CN110121179B - Small cell discovery method and device - Google Patents

Small cell discovery method and device Download PDF

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CN110121179B
CN110121179B CN201810114351.3A CN201810114351A CN110121179B CN 110121179 B CN110121179 B CN 110121179B CN 201810114351 A CN201810114351 A CN 201810114351A CN 110121179 B CN110121179 B CN 110121179B
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base station
micro base
fingerprint information
control signaling
target
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CN110121179A (en
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申滨
雷珍珠
纪子超
郑倩
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/32—Hierarchical cell structures
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

The embodiment of the invention discloses a small cell discovery method and a small cell discovery device, which relate to the technical field of communication and aim to reduce the co-frequency interference of a PSS (power system safety system) and an SSS (secondary synchronization signal) in the small cell discovery process. The method comprises the following steps: the macro base station receives first wireless position fingerprint information sent by first User Equipment (UE), wherein the first wireless position fingerprint information is used for indicating the current position of the first UE; under the condition that the first wireless position fingerprint information accords with second wireless position fingerprint information stored in the macro base station, the macro base station sends a first control signaling to a first micro base station corresponding to the second wireless position fingerprint information, the second wireless position fingerprint information is used for indicating that the UE is located in a small cell served by the first micro base station, the first control signaling is used for triggering the first micro base station to send a primary synchronization signal PSS and a secondary synchronization signal SSS, and the PSS and the SSS are used for the first UE to discover the small cell.

Description

Small cell discovery method and device
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a small cell discovery method and a small cell discovery device.
Background
Dense heterogeneous network (Dense HetNet) is one of the key enabling technologies for the fifth generation mobile communication, and plays an important role in improving system spectrum efficiency, energy efficiency, network capacity and data transmission rate. The basic idea of the dense heterogeneous network is to increase the deployment density and number of micro base stations by introducing low-power micro base stations (micro base stations generally refer to base stations or relay nodes with small volume, low transmission power, light weight and supporting less carriers), so as to improve the spectrum reuse rate of the network and improve the overall performance of the network.
In a conventional small cell discovery process, a micro base station providing a service for a small cell usually continuously transmits a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), and a User Equipment (UE) may periodically perform Inter-Frequency Scanning (IFS) to acquire a PSS and an SSS, and acquire a small cell ID providing a service for the micro base station and perform time-Frequency Synchronization according to the PSS and the SSS.
However, in the case of dense deployment of micro base stations, if different micro base stations continuously transmit PSS and SSS on the same frequency domain resource, the PSS and SSS transmitted between multiple adjacent micro base stations may cause co-channel interference, which may cause performance degradation to the process of UE discovering a small cell.
Disclosure of Invention
The embodiment of the invention provides a small cell discovery method and a small cell discovery device, which are used for reducing the co-frequency interference of a PSS (power system safety system) and an SSS (secondary synchronization signal) in the small cell discovery process.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a small cell discovery method, where the method includes:
the macro base station receives first wireless position fingerprint information sent by first User Equipment (UE), wherein the first wireless position fingerprint information is used for indicating the current position of the first UE;
under the condition that the first wireless position fingerprint information accords with second wireless position fingerprint information stored in the macro base station, the macro base station sends a first control signaling to a first micro base station corresponding to the second wireless position fingerprint information, the second wireless position fingerprint information is used for indicating that the UE is located in a small cell served by the first micro base station, the first control signaling is used for triggering the first micro base station to send a primary synchronization signal PSS and a secondary synchronization signal SSS, and the PSS and the SSS are used for the first UE to discover the small cell.
In a second aspect, an embodiment of the present invention provides a small cell discovery method, where the method includes:
a first micro base station receives a first control signaling sent by a macro base station, wherein the first control signaling is used for triggering the first micro base station to send a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) to UE, and the PSS and the SSS are used for the UE to discover a small cell provided with service by the first micro base station;
and the first micro base station sends the PSS and the SSS to the UE according to the first control signaling.
In a third aspect, an embodiment of the present invention provides a small cell discovery method, where the method includes:
the target UE acquires target wireless position fingerprint information and an identifier of a cell served by the target micro base station, wherein the target wireless position fingerprint information and the identifier of the cell served by the target micro base station are acquired after the target UE discovers the target micro base station, the target wireless position fingerprint information is used for indicating the current position of the target UE, the reference signal receiving power RSRP of the target micro base station is greater than or equal to a micro base station with a preset threshold value, and the target wireless position fingerprint information and the identifier of the cell served by the target micro base station are used for a macro base station to establish a fingerprint database;
and the target UE sends the target wireless position fingerprint information and the identification of the cell served by the target micro base station to the macro base station.
In a fourth aspect, an embodiment of the present invention provides a macro base station, where the macro base station includes: the device comprises a receiving module and a first sending module;
the receiving module is used for receiving first wireless position fingerprint information sent by first User Equipment (UE), and the first wireless position fingerprint information is used for indicating the current position of the first UE;
the first sending module is configured to send a first control signaling to a first micro base station corresponding to second wireless location fingerprint information when the first wireless location fingerprint information received by the receiving module conforms to the second wireless location fingerprint information stored in the macro base station, where the second wireless location fingerprint information is used to indicate that the UE is located in a small cell served by the first micro base station, and the first control signaling is used to trigger the first micro base station to send a primary synchronization signal PSS and a secondary synchronization signal SSS, and the PSS and the SSS are used for the first UE to discover the small cell.
In a fifth aspect, an embodiment of the present invention provides a micro base station, where the micro base station includes: the device comprises a first receiving module and a sending module;
a first receiving module, configured to receive a first control signaling sent by a macro base station, where the first control signaling is used to trigger a first micro base station to send a primary synchronization signal PSS and a secondary synchronization signal SSS, and the PSS and the SSS are used for a first UE to discover a small cell served by the first micro base station;
and the sending module is used for the first micro base station to send the PSS and the SSS according to the first control signaling received by the first receiving module.
In a sixth aspect, an embodiment of the present invention provides a UE, where the UE includes: the device comprises an acquisition module and a sending module;
an obtaining module, configured to obtain target wireless location fingerprint information and an identifier of a cell served by a target micro base station, where the target wireless location fingerprint information and the identifier of the cell served by the target micro base station are obtained after a target UE finds the target micro base station, the target wireless location fingerprint information is used to indicate a current location of the target UE, a reference signal received power RSRP of the target micro base station is greater than or equal to a preset threshold value, the target wireless location fingerprint information and the identifier of the cell served by the target micro base station are used by a macro base station to establish a fingerprint database, and the fingerprint database is used by the macro base station when it is determined that first wireless location fingerprint information sent by a first UE conforms to second wireless location fingerprint information in the fingerprint database, sending a first control signaling to a first micro base station corresponding to the second wireless position fingerprint information, wherein the first control signaling is used for triggering the first micro base station to send a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS);
a sending module, configured to send, to the macro base station, the target wireless location fingerprint information obtained by the obtaining module and an identifier of a cell served by the target micro base station
In a seventh aspect, an embodiment of the present invention provides a macro base station, which includes a processor, a memory, and a computer program stored in the memory and being executable on the processor, and when executed by the processor, the computer program implements the steps of the small cell discovery method in the first aspect.
In an eighth aspect, an embodiment of the present invention provides a micro base station, which includes a processor, a memory, and a computer program stored on the memory and operable on the processor, and when executed by the processor, the computer program implements the steps of the small cell discovery method in the second aspect.
In a ninth aspect, an embodiment of the present invention provides a user equipment UE, including a processor, a memory, and a computer program stored on the memory and operable on the processor, where the computer program, when executed by the processor, implements the steps of the small cell discovery method in the third aspect.
In a tenth aspect, embodiments of the present invention provide a computer-readable storage medium on which is stored a computer program which, when executed by a processor, implements the steps of the small cell discovery method as in the first or second or third aspect.
In an eleventh aspect, an embodiment of the present invention provides a wireless communication system, including: a macro base station, a micro base station and User Equipment (UE);
the macro base station comprises a macro base station according to the fourth aspect or a macro base station according to the seventh aspect;
the micro base station comprises the micro base station according to the fifth aspect or the micro base station according to the eighth aspect;
the UE comprises the UE of the sixth aspect or the UE of the ninth aspect.
In the embodiment of the invention, a macro base station receives first wireless position fingerprint information sent by first UE, wherein the first wireless position fingerprint information is used for indicating the current position of the first UE; under the condition that the first wireless location fingerprint information conforms to second wireless location fingerprint information stored in the macro base station, the macro base station sends a first control signaling to a first micro base station corresponding to the second wireless location fingerprint information, the second wireless location fingerprint information is used for indicating that the UE is located in a small cell served by the first micro base station, the first control signaling is used for triggering the first micro base station to send a PSS and an SSS, and the PSS and the SSS are used for enabling the first UE to find the small cell. In this scheme, the UE may obtain first wireless location fingerprint information and send the first wireless location fingerprint information to the macro base station. After receiving the first wireless location fingerprint information, the macro base station may match the first wireless location fingerprint information with second wireless location fingerprint information stored in the macro base station, and when the first wireless location fingerprint information conforms to the second wireless location fingerprint information, the macro base station is used to indicate that the UE is located in a small cell served by the micro base station in combination with the second wireless location fingerprint information, learn that the UE is located in the small cell served by the first micro base station, and send a control signaling to the micro base station to trigger the micro base station to send a PSS and an SSS. The micro base station receives the control signaling and transmits PSS and SSS to enable the UE to discover the small cell through IFS. Therefore, compared with the micro base station which does not stop sending the PSS and the SSS in the prior art, the micro base station determines whether to send the PSS and the SSS according to the control signaling of the macro base station, so that the time for sending the PSS and the SSS is reduced, and the co-frequency interference of the PSS and the SSS in the process of discovering the small cell can be effectively reduced.
Drawings
Fig. 1 is a schematic diagram of a possible network structure of a communication system according to an embodiment of the present invention;
fig. 2 is a flowchart of a small cell discovery method according to an embodiment of the present invention;
fig. 3 is a second flowchart of a small cell discovery method according to an embodiment of the present invention;
fig. 4 is a third flowchart of a small cell discovery method according to an embodiment of the present invention;
fig. 5 is a timing diagram illustrating a small cell discovery method according to an embodiment of the present invention;
fig. 6 is a fourth flowchart of a small cell discovery method according to an embodiment of the present invention;
fig. 7 is a fifth flowchart of a small cell discovery method according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a macro base station according to an embodiment of the present invention;
fig. 9 is a second schematic structural diagram of a macro base station according to an embodiment of the present invention;
fig. 10 is a third schematic structural diagram of a macro base station according to an embodiment of the present invention;
fig. 11 is a fourth schematic structural diagram of a macro base station according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a micro base station according to an embodiment of the present invention;
fig. 13 is a second schematic structural diagram of a micro base station according to an embodiment of the present invention;
fig. 14 is a third schematic structural diagram of a micro base station according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;
fig. 16 is a hardware diagram of a user equipment according to an embodiment of the present invention;
fig. 17 is a hardware schematic diagram of a macro base station according to an embodiment of the present invention;
fig. 18 is a hardware schematic diagram of a micro base station according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and "fourth," etc. in the description and in the claims of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first input, the second input, the third input, the fourth input, etc. are used to distinguish between different inputs, rather than to describe a particular order of inputs.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the description of the embodiments of the present invention, unless otherwise specified, "a plurality" means two or more, for example, a plurality of processing units means two or more processing units; plural elements means two or more elements, and the like.
The embodiment of the invention provides a small cell discovery method, wherein UE (user equipment) can acquire first wireless location fingerprint information and send the first wireless location fingerprint information to a macro base station. After receiving the first wireless location fingerprint information, the macro base station may perform matching search on the first wireless location fingerprint information and second wireless location fingerprint information stored in the macro base station, and when the first wireless location fingerprint information conforms to the second wireless location fingerprint information, the macro base station is used to indicate that the UE is located in a small cell served by the micro base station in combination with the second wireless location fingerprint information, and when knowing that the UE is located in the small cell served by the first micro base station, the macro base station sends a control signaling to the micro base station to trigger the micro base station to send a PSS and an SSS. The micro base station receives the control signaling and transmits PSS and SSS to enable the UE to discover the small cell through IFS. Therefore, compared with the prior art that the micro base station continuously sends the PSS and the SSS, the scheme adopts the mechanism that the micro base station determines whether to send the PSS and the SSS according to the control signaling of the macro base station, so that the time for sending the PSS and the SSS is reduced, and the co-frequency interference of the PSS and the SSS in the process of discovering the small cell can be effectively reduced.
The technical scheme provided by the invention can be applied to various communication systems, such as a 5G communication system, a future evolution system or a plurality of communication convergence systems and the like. The method is particularly suitable for a dense heterogeneous network system (5G) or an LTE system (4G) with a large number of deployed small cells, can effectively inhibit co-frequency interference of reference signals between the small cells, and improves effectiveness and timeliness of discovery of the UE small cells.
Fig. 1 shows a schematic diagram of a possible structure of a communication system according to an embodiment of the present invention. As shown in fig. 1, the communication system includes at least one UE100, one micro base station 200, and one macro base station 300 (only one is shown in fig. 1), and the UE100, the micro base station 200, and the macro base station 300 may communicate with each other (transmit signaling or transmit data), and each macro base station 300 or the micro base station 200 may communicate with one or more UEs 100. In practical applications, the connections between the above devices may be wireless connections, and fig. 1 illustrates the connections between the devices by solid lines for convenience and convenience in visual representation.
The micro base station 200 may be understood as a base station with a small coverage area, a small volume, a light weight, and a low transmission power, compared to the macro base station 300. Specifically, reference may be made to the prior art, and embodiments of the present invention are not limited. The UE100 provided in the embodiment of the present invention may be a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, or a Personal Digital Assistant (PDA), and fig. 1 illustrates that the UE100 is a mobile phone.
Example one
Referring to fig. 2, an embodiment of the present invention provides a small cell discovery method, which may include steps 101 to 111 described below.
Step 101, a first UE acquires first wireless location fingerprint information.
The first UE may be any UE located in a small cell served by the first micro base station and needing small cell discovery. The first wireless location fingerprint information is used to indicate a location where the first UE is currently located. Because there is a difference in the reference signals of the macro base stations received by the UEs located in different geographic locations, a certain characteristic value of the reference signals of N different macro base stations received by the UE located in a certain geographic location may be used as infinite location fingerprint information of the UE located in the certain geographic location. The wireless location fingerprint information includes, but is not limited to, one of Reference Signal Receiving Power (RSRP), Time of Arrival (TOA), Time Difference of Arrival (TDOA), Received Signal Strength (RSS), and angle of Arrival (AOA). The first UE may acquire the wireless location fingerprint information of the first UE through a wireless location fingerprint positioning technology, and the specific wireless location technology may refer to the related art, which is not limited in the embodiment of the present invention.
Illustratively, the UE is in an area within the coverage of a macro cell (macro base station) within which the UE is locatedThe method comprises the steps that downlink reference signals from a plurality of nearby macro base stations can be received, UE selects N macro base stations with RSRP larger than or equal to a first preset threshold value as positioning reference macro base stations through measurement and processing, and N fingerprint characteristic values are obtained, namely wireless position fingerprint information is obtained. The first preset threshold may be any value that satisfies the communication condition, and the second preset threshold is, for example, a value between-90 db and-105 db, which is not limited in the embodiments of the present invention. When the UE moves in the network and does not establish connection with the small cell, the same frequency band detection (frequency band occupied by the macro base station) is periodically carried out, namely the wireless position fingerprint information of the current position is detected, and the detected wireless position fingerprint information F is detecteduAnd sending the information to the macro base station.
Step 102, the first UE sends first wireless position fingerprint information to a macro base station.
Step 103, the macro base station receives the first wireless location fingerprint information sent by the first UE.
And step 104, the macro base station matches the first wireless position fingerprint information with second wireless position fingerprint information stored in the macro base station.
For example, the second wireless location fingerprint information may be wireless location fingerprint information in a fingerprint database.
The fingerprint database may be a pre-established fingerprint database or a dynamically established fingerprint database, for example.
Illustratively, the fingerprint database comprises W fingerprint data blocks, each fingerprint data block is identified as an identification of a small cell served by one micro base station, each fingerprint data block comprises M pieces of wireless location fingerprint information, each piece of wireless location fingerprint information comprises an identification of a macro cell served by N macro base stations and N fingerprint characteristic values, and the identification of the macro cell served by one macro base station corresponds to one fingerprint characteristic value; wherein W, M and N are both positive integers.
For example, an empty fingerprint database (FP database) may be constructed according to the deployment situation of the network (assuming that there are W small cells and N macro cells, and each small cell selects M fingerprint points). Specifically, the fingerprint database includes W fingerprint data blocks (FPblocks), that is, a set of wireless location fingerprint information generated according to a fingerprint point of each small cell is a fingerprint data block, and each fingerprint data block is identified by an ID of the corresponding small cell. Let FPd denote the fingerprint database, FPd { i }, (i ═ 1,2, …, W) denote the fingerprint data blocks corresponding to small cell i. A series of fingerprint points (each fingerprint point represents a small geographic area with the center as the center, and the sum of the geographic areas represented by all the fingerprint points includes the edge area of the small cell) are uniformly selected in the edge coverage area of each micro base station, and the number of the fingerprint points can be set according to the computing capacity and the identification precision supported by the system on the assumption that M fingerprint points are selected for each small cell. At each fingerprint point, there is specific wireless position fingerprint information, and the off-line stage (namely, the stage of establishing a fingerprint database). It should be noted that: generally, when a UE measures infinite location fingerprint information at any point in a small geographic area represented by one fingerprint point, the macro base station selected as a location reference is the same.
The fingerprint database is used for the macro base station to send a first control signaling to a first micro base station corresponding to second wireless position fingerprint information under the condition that the first wireless position fingerprint information sent by the first UE is determined to accord with the second wireless position fingerprint information in the fingerprint database, and the first control signaling is used for triggering the first micro base station to send a primary synchronization signal PSS and a secondary synchronization signal SSS.
In the first scheme, the fingerprint database is a fingerprint database which is established in advance.
Specifically, referring to fig. 3, the method for creating the fingerprint database may include the following steps 201 to 204.
Step 201, target UE located on any fingerprint point acquires target wireless location fingerprint information.
Step 202, the target UE sends the target wireless position fingerprint information to the macro base station.
Step 203, the macro base station receives the target wireless location fingerprint information sent by the target UE.
And step 204, the macro base station stores the fingerprint information of the target wireless position to a corresponding fingerprint data block according to the ID of the small cell where the target UE is located.
For example, the target UE may simultaneously send the ID of the small cell where the target UE is located to the macro base station, and the macro base station may store the target wireless location fingerprint information to the corresponding fingerprint data block according to the ID of the small cell where the target UE is located.
For example, in the process of establishing the fingerprint database, one data block is established, that is, one fingerprint data block is established each time, so that the target wireless location fingerprint information sent by the target UE belongs to the same fingerprint data block at the same time or in the same time period.
Illustratively, the macro base station saves wireless location fingerprint information acquired by the target UE located at the fingerprint point of the small cell i into the fingerprint data block FPd { i }.
Taking TOA as an example of the radio location fingerprint, a fingerprint database shown in table 1 is designed, where each piece of radio location fingerprint information FPi includes radio characteristic quantity values of N (N >3) macro cell base station downlink reference signals and corresponding N macro cell IDs. Wherein MIDi represents the cell ID corresponding to the macro cell i, and TOAm, j represents the j-th position fingerprint characteristic value in the m-th fingerprint item.
TABLE 1 TOA fingerprint database
Figure BDA0001570225800000061
It should be noted that: in the embodiment of the present invention, the above steps 101 to 204 may be executed in a loop until the fingerprint database is built. And after the fingerprint database is established, the wireless position fingerprint information in the fingerprint database can be updated. Specifically, reference may be made to the prior art, and embodiments of the present invention are not limited.
And in the second scheme, the fingerprint database is a dynamically established fingerprint database.
Specifically, referring to fig. 4, in the case that the target UE is in different locations, the macro base station cyclically executes the following method to establish the fingerprint database:
step 301, the target UE acquires the target wireless location fingerprint information and the identity of the small cell served by the target micro base station.
The target micro base station is a micro base station of which the Reference Signal Received Power (RSRP) is greater than or equal to a second preset threshold value in the micro base stations discovered by the target UE. The second preset threshold may be any RSRP value that satisfies a communication condition, and the second preset threshold may be the same as or different from the first preset threshold. For example, the preset threshold may be set to-90 db, i.e., all micro base stations with RSRP greater than or equal to-90 db may be target micro base stations.
The method for discovering the target micro base station by the target UE may be any one of the related arts, and the embodiment of the present invention is not limited. Illustratively, a micro base station providing service for a small cell continuously transmits a PSS and a SSS, and a UE periodically performs IFS to acquire the PSS and the SSS, and acquires an ID of the small cell providing service by the micro base station and performs time-frequency synchronization according to the PSS and the SSS.
For example, the number N of macro base stations used for location reference is set in advance, and then the target UE may measure the TOA values of N macro base stations whose RSRP meets the second preset threshold, that is, obtain N fingerprint feature values, so as to obtain the target wireless location fingerprint information.
Step 302, the target UE sends the target wireless location fingerprint information and the identification of the small cell served by the target micro base station to the macro base station.
Step 303, the macro base station receives the target wireless location fingerprint information sent by the target UE and the identifier of the small cell served by the target micro base station.
And step 304, the macro base station matches the target wireless position fingerprint information with each piece of wireless position fingerprint information stored in the macro base station.
The wireless position fingerprint information stored in the macro base station is the wireless position fingerprint information stored in the database. The macro base station compares the target wireless position fingerprint information with the existing wireless position fingerprint information of the fingerprint database, when the root mean square error delta of the target wireless position fingerprint information and the existing wireless position fingerprint information of the fingerprint database meets the condition that delta is less than or equal to-alpha or delta is greater than or equal to alpha, the target wireless position fingerprint information does not accord with the existing wireless position fingerprint information of the fingerprint database, and when the target wireless position fingerprint information does not meet the condition that delta is less than or equal to-alpha, the macro base station compares the target wireless position fingerprint information with the existing wireless position fingerprint information of the fingerprint databaseWhen the position fingerprint information does not accord with any wireless position fingerprint information existing in the fingerprint database, the target wireless position fingerprint information can be stored in a corresponding fingerprint data block in the fingerprint database; otherwise, the target wireless position fingerprint information accords with the existing wireless position fingerprint information of the fingerprint database, and the target wireless position fingerprint information is discarded. Wherein alpha is not less than beta, beta is 2r/vL，vLFor the electromagnetic wave propagation speed, r is the radius of the circular geographic area within the tolerance range of the matching error, i.e., r is the radius of a small geographic area represented by a fingerprint point and taking the fingerprint point as the center.
In case the target wireless location fingerprint information does not correspond to any wireless location fingerprint information stored in the macro base station, the following step 305 is performed, otherwise the following step 306 is performed.
Step 305, the macro base station stores the fingerprint information of the target wireless position into a fingerprint data block corresponding to the identification of the small cell served by the target micro base station.
And step 306, the macro base station discards the fingerprint information of the target wireless position.
It should be noted that: the fingerprint database established in the present scheme can also refer to table 1. Before the establishment of the fingerprint database is completed, the UE may discover a small cell served by the micro base station according to any small cell discovery method in the prior art, and after the establishment of the fingerprint database is completed, the UE may discover a small cell served by the micro base station according to the small cell discovery method provided in the embodiment of the present invention.
Illustratively, the macro base station fingerprints the first wireless location information FuAnd matching with a fingerprint database (FPd), namely comparing with each piece of wireless position fingerprint information in the fingerprint database one by one. For example, the macro base station fingerprints the first wireless location information FuAnd comparing with the second wireless location fingerprint information. When the root mean square error delta of the first wireless position fingerprint information and the second wireless position fingerprint information meets the condition that beta is more than delta and less than beta, the first wireless position fingerprint information accords with the second wireless position fingerprint information, otherwise, the first wireless position fingerprint information does not accord with the second wireless position fingerprint information. Wherein, beta is a matching mean square error threshold, and beta is 2r/vL，vLFor electromagnetic wave propagation speed, r is the radius of the circular geographic area within the tolerance range of the matching error. Specifically, the root mean square error formula can be referred to as follows:
Figure BDA0001570225800000071
Figure BDA0001570225800000072
wherein FPd { i }*,j*Denotes a fingerprint block
Figure BDA0001570225800000073
Middle j*Bar fingerprint, i.e. cell ID of
Figure BDA0001570225800000074
J < th > corresponding to the small cell of (1)*Bar fingerprint information, Fu(j) Representing the jth fingerprint feature value, FPd { i }, of the current fingerprint information of the UE*,j*Denotes a fingerprint block
Figure BDA0001570225800000075
Middle j*The nth fingerprint feature value of the bar fingerprint. If a piece of second wireless position fingerprint information and first wireless position fingerprint information F fed back by the first UE can be found in the fingerprint databaseuIf the error delta is within the set range-beta < delta < beta, the matching is considered to be successful. The macro base station may determine, according to the fingerprint data block where the second wireless location fingerprint information is located, that the first UE is located in an edge area of a certain small cell, that is, determine a cell ID corresponding to a target small cell (a small cell to be discovered).
Executing step 105 when the first wireless location fingerprint information conforms to second wireless location fingerprint information stored in the macro base station; otherwise, the step 101 is executed.
And 105, the macro base station sends a first control signaling to the first micro base station corresponding to the second wireless position fingerprint information.
The second wireless location fingerprint information is used for indicating that the UE is in a small cell served by the first micro base station, the first control signaling is used for triggering the first micro base station to send a PSS and a SSS to the UE, and the PSS and the SSS are used for the UE to discover the small cell.
For example, with the above example, after the macro base station determines the ID of the target small cell that the first UE needs to discover, the macro base station sends a first control signaling to the first micro base station that provides a service for the small cell, so that the first micro base station sends a PSS and a SSS to the first UE, and the first UE obtains the PSS and the SSS through the IFS to discover the small cell. Here, the first UE may perform IFS periodically. Specifically, the IFS performed by the first UE and the PSS and SSS sent by the first micro base station may refer to the related art, and the embodiment of the present invention is not limited.
And 106, the first micro base station receives a first control signaling sent by the macro base station.
And step 107, the first micro base station sends the PSS and the SSS to the UE according to the first control signaling.
Illustratively, the first micro base station is according to the first control signaling and according to the preset time length TsSending PSS and SSS to UE with preset duration TsGreater than or equal to the duration of one small cell discovery completed by the UE, specifically TsThe embodiments of the present invention are not limited according to actual situations. Therefore, the time for the first micro base station to send the PSS and the SSS is limited, the first UE can be ensured to complete the discovery of the small cell, the PSS and the SSS can be sent to the greatest extent, and the co-frequency interference of the PSS and the SSS between the small cells is reduced.
Exemplarily, fig. 5 is a timing diagram of the present invention, where state 1 is that a micro base station providing services for a small cell does not send a PSS/SSS, state 2 is that the PSS/SSS is sent, and a trigger event is that matching of first radio location fingerprint information of a first UE and second radio location fingerprint information in a fingerprint database is successful.
And 108, the first UE obtains the PSS and the SSS through the IFS and discovers the small cell served by the first micro base station.
And if the first UE successfully discovers the small cell and establishes connection with the corresponding small cell, the first UE stops the same-frequency-band detection. If the first UE fails to find the small cell, the first UE continues to perform the same-frequency-band detection (acquire the wireless location fingerprint information), i.e. returns to perform step 101. Or, when the first UE is disconnected from the small cell, the first UE will continue to perform the same-frequency-band detection, that is, return to step 101.
Therefore, the micro base station can send the PSS/SSS as required, so that the co-frequency interference of the PSS/SSS between small cells is effectively reduced, and the success rate of small cell discovery is improved to a certain extent.
For example, referring to fig. 6, in the case that the first wireless location fingerprint information conforms to the second wireless location fingerprint information stored in the macro base station, and before step 108, the method may further include: steps 109 to 111 described below.
Step 109, the macro base station sends the second control signaling to the first UE.
The second control signaling is used for triggering the first UE to perform the inter-frequency scanning IFS.
That is, the first UE does not periodically perform inter-frequency scanning, but performs IFS when necessary according to the control signaling of the macro base station.
And step 110, the first UE receives a second control signaling sent by the macro base station.
And step 111, the first UE performs IFS according to the second control signaling.
It should be noted that: step 105 to step 107 and step 109 to step 111 are not in sequence, and step 105 to step 107 may be executed first, and then step 109 to step 111 are executed, or step 109 to step 111 may be executed first, and then step 105 to step 107 are executed, or may be executed simultaneously, which is not limited in the embodiment of the present invention.
Illustratively, after receiving the instruction of the macro base station, the first UE immediately performs IFS, and if the IFS is within the preset time period TsAnd completing the discovery of the small cell, and establishing connection with the corresponding small cell, and stopping the detection of the same frequency band by the first UE. If the first UE fails to find the small cell, the first UE continues to perform the same-frequency-band detection (acquire the wireless location fingerprint information), i.e. returns to perform step 101.
Compared with the prior art that the UE carries out IFS blindly and periodically, the IFS process of the UE can be controlled in a very small geographical and time range, so that the times of the UE for executing invalid IFS are greatly reduced and avoided, and the problem of energy consumption efficiency of the UE when the UE carries out small cell discovery is better solved.
For example, in the network, if a micro base station serving a small cell does not establish a connection with any UE (i.e. there is no traffic load in the coverage area of the micro base station), the macro base station sends a control signaling to the micro base station, instructing the micro base station to turn off. On the contrary, when the wireless location fingerprint information of the UE matches the wireless location fingerprint information in the fingerprint data block identified by the small cell ID in the database, if the micro base station serving the small cell is in the off state, the macro base station sends a control command to the micro base station, and requests the micro base station to be turned on.
Exemplarily, referring to fig. 7, before step 101, the small cell discovery method provided in the embodiment of the present invention may further include the following steps 112 to 114; after step 104 and before step 105, the small cell discovery method provided in the embodiment of the present invention may further include the following steps 115 to 117.
And step 112, under the condition that the first micro base station is determined not to be connected with any UE, the macro base station sends a third control signaling to the first micro base station.
The third control signaling is used for triggering the first micro base station to close.
And 113, the first micro base station receives a third control signaling sent by the macro base station.
And step 114, the first micro base station closes the first micro base station according to the third control signaling.
And step 115, under the condition that the first micro base station is determined to be closed, the macro base station sends a second control signaling to the first micro base station.
The second control signaling is used for triggering the first micro base station to start.
And step 116, the first micro base station receives a second control signaling sent by the macro base station.
And step 117, the first micro base station starts the first micro base station according to the second control signaling.
The above steps 112 to 117 may refer to the related art, and the embodiments of the present invention are not limited thereto.
It should be noted that: there is no absolute order relationship between the steps 112-114 and the step 101, and the embodiment of the present invention only exemplifies that the steps 112-114 are executed before the step 101, and actually, the steps 112-114 may also occur after the step 101 or simultaneously with the step 101, and the embodiment of the present invention is not limited.
The embodiment of the invention provides a small cell discovery method, wherein UE (user equipment) can acquire first wireless location fingerprint information and send the first wireless location fingerprint information to a macro base station. After receiving the first wireless location fingerprint information, the macro base station may match the first wireless location fingerprint information with second wireless location fingerprint information stored in the macro base station, and when the first wireless location fingerprint information conforms to the second wireless location fingerprint information, the macro base station is used to indicate that the UE is located in a small cell served by the micro base station in combination with the second wireless location fingerprint information, learn that the UE is located in the small cell served by the first micro base station, and send a control signaling to the micro base station to trigger the micro base station to send a PSS and an SSS. The micro base station receives the control signaling and transmits PSS and SSS to enable the UE to discover the small cell through IFS. Therefore, compared with the prior art that the micro base station continuously sends the PSS and the SSS, the scheme designs a mechanism that the micro base station determines whether to send the PSS and the SSS according to the control signaling of the macro base station, so that the time for sending the PSS and the SSS is reduced, and the co-frequency interference of the PSS and the SSS in the process of discovering the small cell can be effectively reduced.
Example two
As shown in fig. 8, an embodiment of the present invention provides a macro base station 120, where the macro base station 120 includes: a receiving module 121 and a first transmitting module 122;
a receiving module 121, configured to receive first wireless location fingerprint information sent by a first user equipment UE, where the first wireless location fingerprint information is used to indicate a current location of the first UE;
a first sending module 122, configured to send a first control signaling to a first micro base station corresponding to second wireless location fingerprint information when the first wireless location fingerprint information received by the receiving module 121 matches the second wireless location fingerprint information stored in the macro base station, where the second wireless location fingerprint information is used to indicate that the UE is in a small cell served by the first micro base station, and the first control signaling is used to trigger the first micro base station to send a primary synchronization signal PSS and a secondary synchronization signal SSS, where the PSS and the SSS are used for the first UE to discover the small cell.
Optionally, the second wireless location fingerprint information is wireless location fingerprint information in a fingerprint database, the fingerprint database is a pre-established fingerprint database or a dynamically established fingerprint database, the fingerprint database includes W fingerprint data blocks, an identifier of each fingerprint data block is an identifier of a small cell served by one micro base station, each fingerprint data block includes M pieces of wireless location fingerprint information, each piece of wireless location fingerprint information includes an identifier of a macro cell served by N macro base stations and N fingerprint characteristic values, and an identifier of a macro cell served by one macro base station corresponds to one fingerprint characteristic value; wherein W, M and N are both positive integers.
Optionally, with reference to fig. 8, as shown in fig. 9, the macro base station 120 further includes: establishing a fingerprint database module 123;
establishing a fingerprint database module 123, configured to, in the case that the target UE is in different locations, cyclically execute the following methods to establish a fingerprint database: receiving target wireless position fingerprint information sent by target UE and an identification of a small cell served by a target micro base station, wherein the target micro base station is a micro base station of which Reference Signal Received Power (RSRP) is greater than or equal to a preset threshold value in micro base stations discovered by the target UE; and under the condition that the target wireless position fingerprint information does not conform to any wireless position fingerprint information stored in the macro base station, storing the target wireless position fingerprint information into a fingerprint data block corresponding to the identification of the small cell served by the target micro base station.
Optionally, with reference to fig. 9, as shown in fig. 10, the macro base station 120 further includes: a second sending module 124, where the second sending module 124 is configured to send, by the macro base station, a second control signaling to the first micro base station under the condition that it is determined that the first micro base station is turned off before the macro base station sends the first control signaling to the first micro base station corresponding to the second wireless location fingerprint information, and the second control signaling is used to trigger the first micro base station to be turned on.
Optionally, with reference to fig. 10, as shown in fig. 11, the macro base station 120 further includes: a third sending module 125, where the third sending module 125 is configured to send, by the macro base station, a third control signaling to the first micro base station before receiving the first wireless location fingerprint information sent by the first user equipment UE, where the macro base station is determined not to establish a connection with any UE, and the third control signaling is used to trigger the first micro base station to be turned off.
Optionally, the step of receiving, by the receiving module, the first wireless location fingerprint information conforming to the second wireless location fingerprint information includes: the root mean square error delta of the first wireless position fingerprint information and the second wireless position fingerprint information meets the condition that beta is more than delta and less than beta, wherein beta is a matching mean square error threshold, and beta is 2r/vL，vLFor electromagnetic wave propagation speed, r is the radius of the circular geographic area within the tolerance range of the matching error.
The terminal device provided in the embodiment of the present invention can implement each process shown in any one of fig. 2 to 7 in the above method embodiments, and details are not described here again to avoid repetition.
The embodiment of the invention provides a macro base station, wherein the macro base station can be matched with second wireless position fingerprint information stored in the macro base station after receiving the first wireless position fingerprint information, when the first wireless position fingerprint information accords with the second wireless position fingerprint information, the macro base station is combined with the second wireless position fingerprint information to indicate that UE is positioned in a small cell provided with service by a micro base station, the macro base station knows that the UE is positioned in the small cell provided with service by a first micro base station, and the macro base station sends a control signaling to the micro base station to trigger the micro base station to send PSS and SSS. Therefore, compared with the micro base station which does not stop sending the PSS and the SSS in the prior art, the micro base station determines whether to send the PSS and the SSS according to the control signaling of the macro base station, so that the time for sending the PSS and the SSS is reduced, and the co-frequency interference of the PSS and the SSS in the process of discovering the small cell can be effectively reduced.
EXAMPLE III
As shown in fig. 12, an embodiment of the present invention provides a micro base station 130, where the micro base station 130 includes: a first receiving module 131 and a transmitting module 132;
a receiving module 131, configured to receive a first control signaling sent by a macro base station, where the first control signaling is used to trigger a first micro base station to send a primary synchronization signal PSS and a secondary synchronization signal SSS to a UE, and the PSS and the SSS are used for the UE to discover a small cell served by the first micro base station;
a sending module 132, configured to send, by the first micro base station, the PSS and the SSS to the UE according to the first control signaling received by the receiving module 131.
Optionally, the sending module 132 is specifically configured to send, according to the first control signaling, the PSS and the SSS to the UE according to a preset time length, where the preset time length is greater than or equal to a time length for the UE to complete one-time small cell discovery.
Optionally, with reference to fig. 12, as shown in fig. 13, the micro base station 130 further includes: a second receiving module 133 and an opening module 134, where the second receiving module 133 is configured to receive a second control signaling sent by the macro base station before the first micro base station receives the first control signaling sent by the macro base station, and the second control signaling is used to trigger the first micro base station to open; a starting module 134, configured to start the first micro base station according to the second control signaling received by the second receiving module 133.
Optionally, with reference to fig. 13, as shown in fig. 14, the micro base station 130 further includes: a third receiving module 135 and a closing module 136, where the third receiving module 135 is further configured to receive a third control signaling sent by the macro base station, and the third control signaling is used to trigger the first micro base station to close; a closing module 136, configured to close the first micro base station according to the third control signaling received by the third receiving module 135.
The terminal device provided in the embodiment of the present invention can implement each process shown in any one of fig. 2 to 7 in the above method embodiments, and details are not described here again to avoid repetition.
The embodiment of the invention provides a micro base station, wherein the micro base station receives a control signaling sent by the macro base station and sends a PSS (power system state) and a SSS (secondary synchronization signal) under the condition that the macro base station determines that first wireless position fingerprint information accords with second wireless position fingerprint information, so that UE (user equipment) can find a small cell through an IFS (interference rejection service). Therefore, compared with the micro base station which does not stop sending the PSS and the SSS in the prior art, the micro base station determines whether to send the PSS and the SSS according to the control signaling of the macro base station, so that the time for sending the PSS and the SSS is reduced, and the co-frequency interference of the PSS and the SSS in the process of discovering the small cell can be effectively reduced.
Example four
As shown in fig. 15, an embodiment of the present invention provides a UE140, where the UE140 includes: an acquisition module 141 and a sending module 142;
an obtaining module 141, configured to obtain target wireless location fingerprint information and an identifier of a cell served by a target micro base station, where the target wireless location fingerprint information and the identifier of the cell served by the target micro base station are obtained after the target UE finds the target micro base station, the target wireless location fingerprint information is used to indicate a current location of the target UE, the reference signal received power RSRP of the target micro base station is greater than or equal to a preset threshold value, the target wireless location fingerprint information and the identifier of the cell served by the target micro base station are used by a macro base station to establish a fingerprint database, and the fingerprint database is used by the macro base station when it is determined that the first wireless location fingerprint information sent by the first UE matches the second wireless location fingerprint information in the fingerprint database, sending a first control signaling to a first micro base station corresponding to the second wireless position fingerprint information, wherein the first control signaling is used for triggering the first micro base station to send a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS);
a sending module 142, configured to send, to the macro base station, the target wireless location fingerprint information acquired by the acquiring module 141 and an identifier of a cell served by the target micro base station.
Optionally, the fingerprint database includes W fingerprint data blocks, an identifier of each fingerprint data block is an identifier of a small cell served by one micro base station, each fingerprint data block includes M pieces of wireless location fingerprint information, each piece of wireless location fingerprint information includes an identifier of a macro cell served by N macro base stations and N fingerprint feature values, and an identifier of a macro cell served by one macro base station corresponds to one fingerprint feature value; wherein W, M and N are both positive integers.
The terminal device provided in the embodiment of the present invention can implement each process shown in any one of fig. 2 to 7 in the above method embodiments, and details are not described here again to avoid repetition.
The embodiment of the invention provides a UE, which is characterized in that a macro base station establishes a fingerprint database by using target wireless position fingerprint information and an identifier of a cell served by a target micro base station through acquiring the target wireless position fingerprint information and the identifier of the cell served by the target micro base station and sending the target wireless position fingerprint information and the identifier of the cell served by the target micro base station to the macro base station. Therefore, in the process that the UE discovers the small cell, the macro base station can send a control signaling triggering the micro base station to send the PSS and the SSS to the micro base station when the wireless fingerprint position information sent by the UE accords with the wireless fingerprint position information in the fingerprint database. Compared with the prior art that the micro base station continuously sends the PSS and the SSS, the micro base station determines whether to send the PSS and the SSS according to the control signaling of the macro base station, so that the time for sending the PSS and the SSS is shortened, and the co-frequency interference of the PSS and the SSS in the process of discovering the small cell can be effectively reduced.
Fig. 16 is a schematic hardware structure diagram of a user equipment UE implementing various embodiments of the present invention. As shown in fig. 16, the UE100 includes, but is not limited to: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the terminal device configuration shown in fig. 16 does not constitute a limitation of the terminal device, and that the terminal device may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal device, a wearable device, a pedometer, and the like.
Wherein, the processor 110 is configured to obtain target wireless location fingerprint information and an identifier of a cell served by a target micro base station, the target wireless location fingerprint information and the identifier of the cell served by the target micro base station are obtained after the target UE finds the target micro base station, the target wireless location fingerprint information is used to indicate a current location of the target UE, the reference signal received power RSRP of the target micro base station is greater than or equal to a micro base station with a preset threshold, the target wireless location fingerprint information and the identifier of the cell served by the target micro base station are used for the macro base station to establish a fingerprint database, the fingerprint database is used for the macro base station to establish a fingerprint database when the macro base station determines that the first wireless location fingerprint information sent by the first UE conforms to the second wireless location fingerprint information in the fingerprint database, sending a first control signaling to a first micro base station corresponding to the second wireless position fingerprint information, wherein the first control signaling is used for triggering the first micro base station to send a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS); and a radio frequency unit 101, configured to send, to the macro base station, the target wireless location fingerprint information acquired by the processor 110 and an identifier of a cell served by the target micro base station.
The UE provided in the embodiment of the present invention obtains the target wireless location fingerprint information and the identifier of the cell served by the target micro base station, and sends the target wireless location fingerprint information and the identifier of the cell served by the target micro base station to the macro base station, so that the macro base station establishes the fingerprint database by using the target wireless location fingerprint information and the identifier of the cell served by the target micro base station. Therefore, in the process that the UE discovers the small cell, the macro base station can send a control signaling triggering the micro base station to send the PSS and the SSS to the micro base station when the wireless fingerprint position information sent by the UE accords with the wireless fingerprint position information in the fingerprint database. Compared with the prior art that the micro base station continuously sends the PSS and the SSS, the micro base station determines whether to send the PSS and the SSS according to the control signaling of the macro base station, so that the time for sending the PSS and the SSS is shortened, and the co-frequency interference of the PSS and the SSS in the process of discovering the small cell can be effectively reduced.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 101 may be used for receiving and sending signals during a message transmission or call process, and specifically, after receiving downlink data from a base station, the downlink data is processed by the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through a wireless communication system.
The terminal device provides wireless broadband internet access to the user through the network module 102, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the network module 102 or stored in the memory 109 into an audio signal and output as sound. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the terminal device 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 includes a speaker, a buzzer, a receiver, and the like.
The input unit 104 is used to receive an audio or video signal. The input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, and the Graphics processor 1041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the network module 102. The microphone 1042 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode.
The terminal device 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or the backlight when the terminal device 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal device posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 105 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.
The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal device. Specifically, the user input unit 107 includes a touch panel 1071 and other input devices 1072. Touch panel 1071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 1071 (e.g., operations by a user on or near touch panel 1071 using a finger, stylus, or any suitable object or attachment). The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, receives the signaling sent by the processor 110, and executes the signaling. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. Specifically, other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
Further, the touch panel 1071 may be overlaid on the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although in fig. 16, the touch panel 1071 and the display panel 1061 are two independent components to implement the input and output functions of the terminal device, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the terminal device, and is not limited herein.
The interface unit 108 is an interface for connecting an external device to the terminal apparatus 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal apparatus 100 or may be used to transmit data between the terminal apparatus 100 and the external device.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the terminal device, connects various parts of the entire terminal device by using various interfaces and lines, and performs various functions of the terminal device and processes data by running or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the terminal device. Processor 110 may include one or more processing units; alternatively, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The terminal device 100 may further include a power supply 111 (such as a battery) for supplying power to each component, and optionally, the power supply 111 may be logically connected to the processor 110 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.
In addition, the terminal device 100 includes some functional modules that are not shown, and are not described in detail here.
EXAMPLE five
Referring to fig. 17, an embodiment of the present invention further provides a macro base station, which includes a processor 171, a memory 172, and a computer program stored on the memory 172 and capable of running on the processor 171, where the computer program, when executed by the processor 171, implements each process of the small cell discovery method shown in any one of fig. 2 to 7 in the foregoing method embodiments, and can achieve the same technical effect, and is not described herein again to avoid repetition.
It should be noted that the processor 171 may be, for example, a CPU, a general purpose processor, a digital signal processor DSP, an application specific integrated circuit ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The memory 172 may be a storage device or a combination of storage elements, and is used for storing executable program codes or parameters, data, etc. required by the operation of the access network management device. The Memory 172 may include a Random-Access Memory (RAM), or a non-volatile Memory (NVRAM), such as a disk Memory or a Flash Memory.
EXAMPLE six
Referring to fig. 18, an embodiment of the present invention further provides a micro base station, which includes a processor 181, a memory 182, and a computer program stored in the memory 182 and capable of running on the processor 181, where the computer program, when executed by the processor 181, implements each process of the small cell discovery method shown in any one of fig. 2 to 7 in the foregoing method embodiments, and can achieve the same technical effect, and details are not repeated here to avoid repetition.
It should be noted that the processor 181 may be, for example, a CPU, a general purpose processor, a digital signal processor DSP, an application specific integrated circuit ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The memory 182 may be a storage device or a combination of storage elements, and is used for storing executable program codes or parameters, data, etc. required by the operation of the access network management device. The Memory 182 may include a Random-Access Memory (RAM), or a non-volatile Memory (NVRAM), such as a magnetic disk Memory or a Flash Memory.
EXAMPLE seven
An embodiment of the present invention further provides a user equipment UE, which may include the processor 110 shown in fig. 16, the memory 109, and a computer program stored in the memory 109 and operable on the processor 110, where the computer program, when executed by the processor 110, implements each process of the small cell discovery method shown in any one of fig. 2 to 7 in the foregoing method embodiments, and can achieve the same technical effect, and is not described herein again to avoid repetition.
Example eight
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the small cell discovery method shown in any one of fig. 2 to 7 in the foregoing method embodiments, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
Example nine
An embodiment of the present invention further provides a wireless communication system, including: a macro base station, a micro base station and User Equipment (UE);
the macro base station comprises a macro base station as in embodiment two or a macro base station as in embodiment five;
the micro base station comprises the micro base station according to the third embodiment or the micro base station according to the sixth embodiment;
the UE comprises the UE of embodiment four or the UE of embodiment seven.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), and includes signaling for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (24)

1. A small cell discovery method, the method comprising:
a macro base station receives first wireless position fingerprint information sent by first User Equipment (UE), wherein the first wireless position fingerprint information is used for indicating the current position of the first UE;
under the condition that the first wireless location fingerprint information conforms to second wireless location fingerprint information stored in the macro base station, the macro base station sends a first control signaling to a first micro base station corresponding to the second wireless location fingerprint information, the second wireless location fingerprint information is used for indicating that the UE is located in a small cell served by the first micro base station, the first control signaling is used for triggering the first micro base station to send a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), and the PSS and the SSS are used for the first UE to discover the small cell;
before the macro base station sends the first control signaling to the first micro base station corresponding to the second wireless location fingerprint information, the method further includes:
and under the condition that the first micro base station is determined to be closed, the macro base station sends a second control signaling to the first micro base station, wherein the second control signaling is used for triggering the first micro base station to be opened.
2. The method of claim 1, wherein the second radio location fingerprint information is a radio location fingerprint information in a fingerprint database, the fingerprint database is a pre-established fingerprint database or a dynamically established fingerprint database, the fingerprint database comprises W fingerprint data blocks, an identifier of each fingerprint data block is an identifier of a small cell served by one micro base station, each fingerprint data block comprises M radio location fingerprint information, each radio location fingerprint information comprises N identifiers of macro cells served by N macro base stations and N fingerprint feature values, and an identifier of a macro cell served by one macro base station corresponds to one fingerprint feature value;
wherein W, M and N are both positive integers.
3. The method of claim 2, wherein the method of building the fingerprint database comprises:
under the condition that the target UE is in different positions, the macro base station circularly executes the following method to establish the fingerprint database:
the macro base station receives target wireless location fingerprint information sent by the target UE and an identifier of a small cell served by a target micro base station, wherein the target micro base station is a micro base station of which Reference Signal Received Power (RSRP) is greater than or equal to a preset threshold value in the micro base stations discovered by the target UE;
and under the condition that the target wireless position fingerprint information does not conform to any wireless position fingerprint information stored in the macro base station, the macro base station stores the target wireless position fingerprint information into a fingerprint data block corresponding to the identification of the small cell provided with service by the target micro base station.
4. The method of claim 1, wherein before the macro base station receives the first wireless location fingerprint information sent by the first User Equipment (UE), the method further comprises:
and under the condition that the first micro base station is determined not to be connected with any UE, the macro base station sends a third control signaling to the first micro base station, wherein the third control signaling is used for triggering the first micro base station to be closed.
5. The method of any of claims 1-4, wherein the first wireless location fingerprint information being consistent with second wireless location fingerprint information comprises:
the root mean square error delta of the first wireless position fingerprint information and the second wireless position fingerprint information meets the condition that beta is larger than delta and smaller than beta, wherein beta is a matching mean square error threshold, and beta is 2r/vL，vLFor electromagnetic wave propagation speed, r is the radius of the circular geographic area within the tolerance range of the matching error.
6. A small cell discovery method, the method comprising:
a first micro base station receives a first control signaling sent by a macro base station, wherein the first control signaling is used for triggering the first micro base station to send a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) to a UE, and the PSS and the SSS are used for the UE to discover a small cell served by the first micro base station;
the first micro base station sends the PSS and the SSS to the UE according to the first control signaling;
before the first micro base station receives the first control signaling sent by the macro base station, the method further includes:
the first micro base station receives a second control signaling sent by the macro base station, wherein the second control signaling is used for triggering the first micro base station to be started;
and the first micro base station starts the first micro base station according to the second control signaling.
7. The method of claim 6, wherein the first micro base station sends the PSS and the SSS to the UE according to the first control signaling, comprising:
and the first micro base station sends the PSS and the SSS to the UE according to the first control signaling and a preset time length, wherein the preset time length is greater than or equal to the time length for completing the discovery of the small cell by the UE.
8. The method of claim 6, wherein before the first micro base station receives the first control signaling sent by the macro base station, the method further comprises:
the first micro base station receives a third control signaling sent by the macro base station, wherein the third control signaling is used for triggering the first micro base station to close;
and the first micro base station closes the first micro base station according to the third control signaling.
9. A small cell discovery method, the method comprising:
the method comprises the steps that target UE acquires target wireless position fingerprint information and an identification of a cell served by a target micro base station, wherein the target wireless position fingerprint information and the identification of the cell served by the target micro base station are acquired after the target UE discovers the target micro base station, the target wireless position fingerprint information is used for indicating the current position of the target UE, the RSRP of a reference signal of the target micro base station is larger than or equal to a micro base station with a preset threshold value, the target wireless position fingerprint information and the identification of the cell served by the target micro base station are used for establishing a macro base station fingerprint database, and the fingerprint database is used for the macro base station to send a first control signaling to a first micro base station corresponding to second wireless position fingerprint information when the first wireless position fingerprint information sent by the first UE is determined to be in accordance with the second wireless position fingerprint information in the fingerprint database, the first control signaling is used for triggering the first micro base station to send a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) under the condition that the first micro base station is started according to a second control signaling sent by the macro base station, and the second control signaling is used for triggering the first micro base station to be started;
and the target UE sends the target wireless position fingerprint information and the identification of the cell served by the target micro base station to the macro base station.
10. The method of claim 9, wherein the fingerprint database comprises W fingerprint data blocks, each fingerprint data block has an identifier of a small cell served by one micro base station, each fingerprint data block comprises M pieces of wireless location fingerprint information, each piece of wireless location fingerprint information comprises N pieces of identifier of macro cells served by N macro base stations and N pieces of fingerprint feature values, and each identifier of a macro cell served by one macro base station corresponds to one fingerprint feature value;
wherein W, M and N are both positive integers.
11. A macro base station, characterized in that it comprises: the device comprises a receiving module, a first sending module and a second sending module;
the receiving module is configured to receive first wireless location fingerprint information sent by a first User Equipment (UE), where the first wireless location fingerprint information is used to indicate a current location of the first UE;
the first sending module is configured to send a first control signaling to a first micro base station corresponding to second wireless location fingerprint information stored in the macro base station, where the first wireless location fingerprint information received by the receiving module conforms to the second wireless location fingerprint information, the second wireless location fingerprint information is used to indicate that the UE is located in a small cell served by the first micro base station, the first control signaling is used to trigger the first micro base station to send a primary synchronization signal PSS and a secondary synchronization signal SSS, and the PSS and the SSS are used for the first UE to discover the small cell;
the second sending module is configured to send, by the macro base station, a second control signaling to the first micro base station when it is determined that the first micro base station is turned off before the macro base station sends the first control signaling to the first micro base station corresponding to the second wireless location fingerprint information, where the second control signaling is used to trigger the first micro base station to be turned on.
12. The macro base station according to claim 11, wherein the second radio location fingerprint information is radio location fingerprint information in a fingerprint database, the fingerprint database is a pre-established fingerprint database or a dynamically established fingerprint database, the fingerprint database comprises W fingerprint data blocks, an identifier of each fingerprint data block is an identifier of a small cell served by one micro base station, each fingerprint data block comprises M radio location fingerprint information, each radio location fingerprint information comprises N identifiers of macro cells served by N macro base stations and N fingerprint feature values, and an identifier of a macro cell served by one macro base station corresponds to one fingerprint feature value;
wherein W, M and N are both positive integers.
13. A macro base station according to claim 12, wherein the macro base station further comprises: establishing a fingerprint database module;
the fingerprint database establishing module is used for circularly executing the following methods to establish the fingerprint database under the condition that the target UE is at different positions:
receiving target wireless location fingerprint information sent by the target UE and an identifier of a small cell served by a target micro base station, wherein the target micro base station is a micro base station of which Reference Signal Received Power (RSRP) is greater than or equal to a preset threshold value in micro base stations discovered by the target UE;
and under the condition that the target wireless position fingerprint information does not accord with any wireless position fingerprint information stored in the macro base station, storing the target wireless position fingerprint information into a fingerprint data block corresponding to the identification of the small cell served by the target micro base station.
14. A macro base station according to claim 11, wherein the macro base station further comprises: a third sending module;
the third sending module is configured to send, by the macro base station, a third control signaling to the first micro base station when it is determined that the first micro base station is not connected to any UE before receiving first wireless location fingerprint information sent by a first user equipment UE, where the third control signaling is used to trigger the first micro base station to be turned off.
15. A macro base station according to any of claims 11 to 14, wherein the compliance of the first wireless location fingerprint information received by the receiving module with the second wireless location fingerprint information comprises:
the root mean square error delta of the first wireless position fingerprint information and the second wireless position fingerprint information meets the condition that beta is larger than delta and smaller than beta, wherein beta is a matching mean square error threshold, and beta is 2r/vL，vLFor electromagnetic wave propagation speed, r is the radius of the circular geographic area within the tolerance range of the matching error.
16. A micro base station, comprising: the device comprises a first receiving module, a sending module, a second receiving module and an opening module;
the first receiving module is configured to receive a first control signaling sent by a macro base station, where the first control signaling is used to trigger a first micro base station to send a primary synchronization signal PSS and a secondary synchronization signal SSS, and the PSS and the SSS are used for a first UE to discover a small cell served by the first micro base station;
the sending module is configured to send, by the first micro base station, the PSS and the SSS according to the first control signaling received by the first receiving module;
the second receiving module is configured to receive a second control signaling sent by the macro base station before the first micro base station receives the first control signaling sent by the macro base station, where the second control signaling is used to trigger the first micro base station to start;
the starting module is configured to start the first micro base station according to the second control signaling received by the second receiving module.
17. The micro base station of claim 16,
the sending module is specifically configured to send the PSS and the SSS according to a preset duration according to the first control signaling, where the preset duration is greater than or equal to a duration for the UE to complete one-time discovery of the small cell.
18. The micro base station of claim 16, further comprising: a third receiving module and a closing module;
the third receiving module is configured to receive a third control signaling sent by the macro base station before the first micro base station receives the first control signaling sent by the macro base station, where the third control signaling is used to trigger the first micro base station to turn off;
and the closing module is configured to close the first micro base station according to the third control signaling received by the third receiving module.
19. A User Equipment (UE), the UE comprising: the device comprises an acquisition module and a sending module;
the acquiring module is configured to acquire target wireless location fingerprint information and an identifier of a cell served by a target micro base station, where the target wireless location fingerprint information and the identifier of the cell served by the target micro base station are acquired after a target UE finds the target micro base station, the target wireless location fingerprint information is used to indicate a current location of the target UE, the reference signal received power RSRP of the target micro base station is greater than or equal to a preset threshold value, the target wireless location fingerprint information and the identifier of the cell served by the target micro base station are used by a macro base station to establish a fingerprint database, and the fingerprint database is used by the macro base station to send a first control signaling to a first micro base station corresponding to second wireless location fingerprint information when it is determined that the first wireless location fingerprint information sent by the first UE conforms to the second wireless location fingerprint information in the fingerprint database, the first control signaling is used for triggering the first micro base station to send a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) under the condition that the first micro base station is started according to a second control signaling sent by the macro base station, and the second control signaling is used for triggering the first micro base station to be started;
the sending module is configured to send, to the macro base station, the target wireless location fingerprint information acquired by the acquiring module and an identifier of a cell served by the target micro base station.
20. The UE of claim 19, wherein the fingerprint database comprises W fingerprint data blocks, each fingerprint data block identifies a small cell served by one micro base station, each fingerprint data block comprises M pieces of radio location fingerprint information, each piece of radio location fingerprint information comprises N pieces of fingerprint characteristic values and an identification of a macro cell served by N macro base stations, and an identification of a macro cell served by one macro base station corresponds to one fingerprint characteristic value;
wherein W, M and N are both positive integers.
21. A macro base station comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the small cell discovery method of any one of claims 1 to 5.
22. A micro base station comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the small cell discovery method of any one of claims 6 to 8.
23. A user equipment, UE, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the small cell discovery method according to any of claims 9 to 10.
24. A computer readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the small cell discovery method according to any one of claims 1 to 5, or the steps of the small cell discovery method according to any one of claims 6 or 8, or the steps of the small cell discovery method according to claim 9 or 10.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104471991A (en) * 2012-07-12 2015-03-25 高通股份有限公司 Methods and apparatus for power saving in broadcasting carrier information
CN106031243A (en) * 2014-03-28 2016-10-12 英特尔Ip公司 Cell discovery and wake up through device-to-device discovery protocols

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103686683A (en) * 2012-09-14 2014-03-26 中兴通讯股份有限公司 Small cell configuration method and device
US9622170B2 (en) * 2012-11-02 2017-04-11 Blackberry Limited Wireless communication in heterogeneous networks
CN109831813B (en) * 2014-08-21 2020-12-29 上海朗帛通信技术有限公司 Cell search method and device in LAA communication
CN104994550B (en) * 2015-06-23 2018-10-16 北京邮电大学 A kind of unlatching of cell and dormancy method
CN106488540B (en) * 2015-09-01 2019-11-29 华为技术有限公司 A kind of communication means, device and the system of the M2M system based on TDD

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104471991A (en) * 2012-07-12 2015-03-25 高通股份有限公司 Methods and apparatus for power saving in broadcasting carrier information
CN106031243A (en) * 2014-03-28 2016-10-12 英特尔Ip公司 Cell discovery and wake up through device-to-device discovery protocols

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