CN112994826A - Cell search method, device and equipment - Google Patents
Cell search method, device and equipment Download PDFInfo
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- CN112994826A CN112994826A CN202110153473.5A CN202110153473A CN112994826A CN 112994826 A CN112994826 A CN 112994826A CN 202110153473 A CN202110153473 A CN 202110153473A CN 112994826 A CN112994826 A CN 112994826A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
- H04J11/0079—Acquisition of downlink reference signals, e.g. detection of cell-ID
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
- H04J11/0093—Neighbour cell search
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the application provides a cell search method, a device and equipment, wherein the method comprises the following steps: receiving synchronization information sent by network equipment, wherein a cell served by the network equipment is a first cell; acquiring the identifier of the first cell according to the synchronization information; and if the time information of the first cell is not obtained, decoding the synchronization information to obtain the time information of the first cell. The efficiency of searching the adjacent cell by the terminal equipment is improved.
Description
Technical Field
The present application relates to the field of communications, and in particular, to a cell search method, apparatus, and device.
Background
When the terminal device searches for the neighboring cell, it needs to determine the identifier of the neighboring cell and the time information of the neighboring cell.
The cell where the UE is located may have one or more neighbor cells, and for a network device of any one neighbor cell, the network device may send multiple beams to the UE, and the UE decodes each beam to obtain the ID and time information of the neighbor cell served by the network device that sent the beam. However, since one network device may transmit multiple beams, the UE may repeatedly decode multiple beams of the neighboring cell, which may result in inefficient UE search for the neighboring cell.
Disclosure of Invention
The embodiment of the application provides a cell searching method, a cell searching device and cell searching equipment, which are used for solving the technical problem that in the prior art, the efficiency of searching a neighboring cell by UE is low.
In a first aspect, an embodiment of the present application provides a cell search method, where the method includes:
receiving synchronization information sent by network equipment, wherein a cell served by the network equipment is a first cell;
acquiring the identifier of the first cell according to the synchronization information;
and if the time information of the first cell is not obtained, decoding the synchronization information to obtain the time information of the first cell.
In one possible embodiment, the synchronization information comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH; acquiring the identifier of the first cell according to the synchronization information, including:
and determining the identifier of the first cell according to the primary synchronization signal PSS and the secondary synchronization signal SSS.
In a possible implementation, decoding the synchronization information to obtain the time information of the first cell includes:
and decoding the physical broadcast channel PBCH to acquire the time information.
In one possible implementation, decoding the physical broadcast channel PBCH to obtain the time information includes:
acquiring a peak value of the secondary synchronization signal SSS;
and decoding the physical broadcast channel PBCH according to the peak value of the secondary synchronization signal SSS so as to acquire the time information.
In a possible implementation manner, if the time information of the first cell is not obtained, performing a decoding process on the synchronization information to obtain the time information of the first cell includes:
acquiring a cell identification set, wherein the cell identification set comprises an identification of a cell acquiring time information;
and if the cell identifier set does not comprise the identifier of the first cell, decoding the synchronization information to acquire the time information of the first cell.
In a possible implementation, after the decoding process is performed on the synchronization information, the method further includes:
adding the identity of the first cell to the set of cell identities.
In a possible implementation manner, if the time information of the first cell is obtained, the synchronization information is not decoded.
In a second aspect, an embodiment of the present application provides a cell search apparatus, where the cell search apparatus includes a receiving module, an obtaining module, and a processing module, where:
the receiving module is used for receiving synchronization information sent by network equipment, wherein a cell served by the network equipment is a first cell;
the acquisition module is used for acquiring the identifier of the first cell according to the synchronization information;
the processing module is configured to, if the time information of the first cell is not obtained, perform decoding processing on the synchronization information to obtain the time information of the first cell.
In a possible implementation manner, the obtaining module is specifically configured to:
and determining the identifier of the first cell according to the primary synchronization signal PSS and the secondary synchronization signal SSS.
In a possible implementation manner, the obtaining module is specifically configured to:
and decoding the physical broadcast channel PBCH to acquire the time information.
In a possible implementation manner, the obtaining module is specifically configured to:
acquiring a peak value of the secondary synchronization signal SSS;
and decoding the physical broadcast channel PBCH according to the peak value of the secondary synchronization signal SSS so as to acquire the time information.
In a possible implementation, the processing module is specifically configured to:
acquiring a cell identification set, wherein the cell identification set comprises an identification of a cell acquiring time information;
and if the cell identifier set does not comprise the identifier of the first cell, decoding the synchronization information to acquire the time information of the first cell.
In a possible implementation, the apparatus further includes an adding module configured to:
adding the identity of the first cell to the set of cell identities.
In a possible implementation manner, if the time information of the first cell is obtained, the synchronization information is not decoded.
In a third aspect, an embodiment of the present application provides a terminal device, including: a transceiver, a processor, a memory;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored by the memory to cause the processor to perform the cell search method of any one of the first aspect.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the computer-readable storage medium is configured to implement the cell search method according to any one of the first aspect.
In a fifth aspect, the invention also provides a computer program product comprising a computer program which, when executed by a processor, performs the steps of the cell search method according to any of the preceding claims.
The embodiment of the application provides a cell search method, a device and equipment, and the cell search method, the device and the equipment receive synchronization information sent by network equipment, wherein a cell served by the network equipment is a first cell, an identifier of the first cell is obtained according to the synchronization information, and if the time information of the first cell is not obtained, the synchronization information is decoded to obtain the time information of the first cell. In the method, before the terminal device decodes the synchronization information, the terminal device may obtain the identifier of the first cell served by the network device according to the synchronization information, and determine whether the time information of the first cell is obtained according to the identifier of the first cell, and when the time information of the first cell is not obtained, the terminal device decodes the synchronization information, so that the terminal device can be prevented from repeatedly decoding a plurality of synchronization information sent by the network device of the same neighboring cell, and the efficiency of the terminal device in searching for the neighboring cell is improved.
Drawings
Fig. 1 is an architecture diagram of a communication system provided in an embodiment of the present application;
fig. 2 is a schematic flowchart of a cell search method according to an embodiment of the present application;
fig. 3 is a schematic diagram of a neighboring cell according to an embodiment of the present application;
fig. 4 is a schematic diagram of receiving synchronization information sent by a network device according to an embodiment of the present application;
fig. 5 is a schematic flowchart of another cell search method according to an embodiment of the present application;
fig. 6 is a schematic process diagram of a cell search method according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a cell search apparatus according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of another cell search apparatus according to an embodiment of the present application;
fig. 9 is a schematic diagram of a hardware structure of a terminal device provided in the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
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.
For ease of understanding, the concepts related to the embodiments of the present application will be explained first.
A network device: the device has a wireless transceiving function. Including but not limited to: an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE), a base station (gbnodeb or gNB) or TRP in a New Radio (NR), a base station in a subsequent evolution system, an access Node in a wireless fidelity (WiFi) system, a wireless relay Node, a wireless backhaul Node, and the like. The base station may be: macro base stations, micro base stations, pico base stations, small stations, relay stations, or balloon stations, etc. Multiple base stations may support the same technology network as mentioned above, or different technologies networks as mentioned above. The base station may contain one or more co-sited or non co-sited TRPs.
The terminal equipment: the device has a wireless transceiving function. The terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a vehicle-mounted terminal device, a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a wearable terminal device, and the like. The terminal device according to the embodiment of the present application may also be referred to as a terminal, a User Equipment (UE), an access terminal device, a vehicle-mounted terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus. The terminal equipment may also be fixed or mobile.
Next, a communication system to which the embodiment of the present application is applied will be described with reference to fig. 1.
Fig. 1 is an architecture diagram of a communication system according to an embodiment of the present application. Referring to fig. 1, the network device 101 and the terminal device 102 are included. The network device 101 may periodically send synchronization information to the terminal device 102, where the synchronization information may be Single Side Band (SSB) information, and the terminal device 102 may determine an ID and time information (timing information) of a cell served by the network device 101 according to the SSB information. When the terminal device 102 leaves the current cell or the network signal of the current cell is poor, the terminal device may switch to another cell according to the ID and time information of the other cell.
In the related art, for a network device of any one neighbor cell, the network device may transmit a plurality of beams, each including synchronization information, to a terminal device. Since the network devices of multiple neighboring cells all send synchronization information to the terminal device, the terminal device needs to decode each synchronization information to obtain the ID and time information of the neighboring cell served by the network device sending the synchronization information. However, since the same neighboring cell may send multiple pieces of synchronization information, the terminal device may repeatedly decode multiple pieces of synchronization information of the neighboring cell, and thus the efficiency of searching for the neighboring cell by the terminal device is low.
The method and the device aim to solve the technical problem that the efficiency of searching the adjacent cell by the terminal device in the related art is low. The embodiment of the present application provides a cell search method, when a terminal device receives synchronization information sent by a network device serving a first cell, the terminal device detects the synchronization information to obtain an identifier of the first cell, and determines whether the terminal device obtains time information of the first cell according to the identifier of the first cell, if the terminal device has obtained the time information of the first cell, it indicates that the terminal device has obtained the time information of the first cell from other synchronization information sent by the network device serving the first cell, and therefore the terminal device does not need to decode the synchronization information, and if the terminal device does not obtain the time information of the first cell, it indicates that the terminal device does not obtain other synchronization information sent by the network device serving the first cell, and therefore, the terminal device decodes the synchronization information, to obtain time information of the first cell. Therefore, before the terminal equipment decodes the synchronous information, the identification of the adjacent cell served by the network equipment sending the synchronous information is obtained through detecting the synchronous information, so that whether the terminal equipment has obtained the time information of the adjacent cell served by the network equipment sending the synchronous information can be accurately determined, the terminal equipment decodes the synchronous information of the adjacent cell which does not obtain the time information, the number of the synchronous information needing to be decoded by the terminal equipment is reduced, and the efficiency of searching the adjacent cell by the terminal equipment is improved.
The technical means shown in the present application will be described in detail below with reference to specific examples. It should be noted that the following embodiments may exist alone or in combination with each other, and description of the same or similar contents is not repeated in different embodiments.
Fig. 2 is a flowchart illustrating a cell search method according to an embodiment of the present application. Referring to fig. 2, the method may include:
s201, receiving the synchronization information sent by the network equipment.
The execution subject of the embodiment of the application may be a terminal device, and may also be a cell search apparatus arranged in the terminal device. Alternatively, the cell search apparatus may be implemented by software, or may be implemented by a combination of software and hardware.
The cell served by the network device includes a first cell. Optionally, the first cell may be a neighboring cell of a cell where the terminal device is currently located, in other words, the neighboring cell of the cell where the terminal device is currently located may include the first cell.
The cell in which the terminal device is currently located may have a plurality of neighboring cells, and the plurality of neighboring cells may serve a plurality of network devices. The process of the terminal device processing any synchronization information sent by any network device is the same, and hereinafter, the process of processing one synchronization information sent by any network device of the terminal device is taken as an example for explanation.
Optionally, the first cell may be determined according to synchronization information sent by the network device serving the neighboring cell. For example, when the terminal device receives the synchronization information sent by the network device, it may determine that the cell served by the network device is the first cell.
Next, with reference to fig. 3, a neighboring cell of the cell in which the terminal device is located will be described in detail.
Fig. 3 is a schematic diagram of a neighboring cell according to an embodiment of the present disclosure. Please refer to fig. 3, which includes a network device a, a network device B, a network device C and a terminal device. The cell served by the network device a is cell a, the cell served by the network device B is cell B, the cell served by the network device C is cell C, and the cell where the terminal device is located is cell D.
Referring to fig. 3, a cell a, a cell B, and a cell C are neighboring cells of a cell D, and a terminal device may search for the neighboring cell of the cell D in the cell D, so that the terminal device may be connected to a network device serving the neighboring cell in time when the terminal device leaves the cell D. For example, when the terminal device is in the cell D, the neighboring cells of the cell D including the cell a, the cell B, and the cell C may be obtained, and when the terminal device leaves the cell D, the terminal device may obtain the network conditions of the cell a, the cell B, and the cell C, and further determine the cells that can be connected.
The synchronization information is used to indicate information of a cell served by the network device. For example, the synchronization information may include an identification of a cell served by the terminal device and time information of the cell. Alternatively, the synchronization information may be Single Side Band (SSB) information. For example, the Synchronization information may include a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a Physical Broadcast Channel (PBCH), and the like.
Optionally, the network device serving the neighboring cell may send a plurality of synchronization information. For example, a network device serving neighbor cell a may transmit 64 pieces of synchronization information, each of which may be transmitted cyclically at intervals.
Next, the process of receiving the synchronization information sent by the network device is described in detail with reference to fig. 4.
Fig. 4 is a schematic diagram of receiving synchronization information sent by a network device according to an embodiment of the present application. Please refer to fig. 4, which includes a network device a, a network device B and a terminal device. The terminal devices may receive SSB information sent by different network devices, respectively. For example, the terminal device may receive the SSB sent by network device a and the SSB sent by network device B. Optionally, the terminal device may receive multiple SSB messages sent by the same network device. For example, the terminal device may receive a plurality of SSB messages sent by the network device a in a loop.
S202, acquiring the identification of the first cell according to the synchronization information.
The identity of the first cell is used to indicate identity information of the first cell. Optionally, the Identifier of the first Cell may be a Physical Cell Identifier (PCI) of the Cell. Optionally, when the synchronization information is an SSB, the synchronization information includes a PSS, an SSS, and a PBCH, and the terminal device may obtain the identifier of the first cell according to a feasible implementation manner as follows: and determining the identification of the first cell according to the PSS and the SSS. For example, when the terminal device receives SSB information sent by a network device serving a first cell, the terminal device may detect PSS in the SSB information to obtain NID2, detect SSS to obtain NID1, and obtain a PCI according to NID1 and NID2, where when acquiring NID1 and NID2, the terminal device does not need to decode PBCH in the SSB.
S203, if the time information of the first cell is not obtained, decoding the synchronization information to obtain the time information of the first cell.
The time information of the first cell may be time-frequency information of the first cell. Since the time domain location and the frequency domain location of the SSB are flexibly variable in 5G, the time information of the cell cannot be determined only by detecting the SSS and the PSS.
Optionally, the time information of the first cell may be obtained according to the following feasible implementation manners: the PBCH is decoded to acquire time information. For example, the terminal device may decode the PBCH to obtain the index information and the field indication of the SSB, and further obtain the time information of the cell served by the network device that sends the SSB according to the index information and the field indication of the SSB. The index information is used to indicate the identification of the SSB sent by the network device. The field indicates a transmission location for determining the SSB. For example, since SSBs on all beams need to be sent within a 5 ms half frame, the half frame indication may indicate within which 5 ms the SSBs are transmitted. Optionally, the time information of the first cell may be acquired according to the index information of the SSB and the field indication.
Optionally, the PBCH may be decoded according to the following feasible implementation: and acquiring a peak value of SSS, and decoding the PBCH according to the peak value of SSS to acquire time information. Wherein, the peak value of SSS is the relevant peak of SSS. For example, in the first time of the SSB in 5G, only PSS signals are present in the frequency domain of the SSB, and PSS detection may be performed, and then the positions of NID2 and SSS may be obtained, the correlation peak of SSS may be detected, NID1 may be obtained, the PCI of the cell may be obtained according to NID1 and NID2, and PBCH may be decoded according to PCI.
Optionally, before performing decoding processing on the synchronization information sent by the network device serving the first cell, the terminal device may determine whether to acquire the time information of the first cell, and if the time information of the first cell is acquired, the terminal device does not perform decoding processing on the synchronization information, and if the time information of the first cell is not acquired, the terminal device performs decoding processing on the synchronization information. Therefore, the number of the synchronous information needing to be decoded by the terminal equipment can be reduced, and the efficiency of searching the adjacent cell by the terminal equipment can be improved.
Optionally, it may be determined whether the terminal device has acquired the time information of the first cell according to a feasible implementation manner as follows: and acquiring a cell identification set, wherein the cell identification set comprises the identification of the cell acquiring the time information. For example, when acquiring the time information of the cell, the terminal device may add the identifier of the cell to the set, so as to obtain a cell identifier set. And if the cell identification set does not comprise the identification of the first cell, decoding the synchronous information to acquire the time information of the first cell. For example, if the identifier of the first cell is the same as any identifier in the cell identifier set, it is determined that the terminal device has acquired the time information of the first cell; and if the identifier of the first cell is different from all the identifiers in the cell identifier set, determining that the terminal equipment does not acquire the time information of the first cell temporarily, and further decoding the synchronous information to acquire the time information of the first cell.
The embodiment of the application provides a cell search method, which receives synchronization information sent by network equipment, wherein a cell served by the network equipment is a first cell, the synchronization information comprises a PSS, a SSS and a PBCH, and an identifier of the first cell is determined according to the PSS and the SSS. The method comprises the steps of obtaining a cell identification set, wherein the cell identification set comprises an identification of a cell for obtaining time information, if the cell identification set does not comprise the identification of a first cell, terminal equipment does not obtain the time information of the first cell, the terminal equipment decodes synchronous information to obtain the time information of the first cell, and if the cell identification set comprises the identification of the first cell, the terminal equipment already obtains the time information of the first cell, and the terminal equipment does not decode the synchronous information. In the method, if the terminal device has acquired the time information of the first cell, it indicates that the terminal device has acquired the time information of the first cell from other synchronization information sent by the network device serving the first cell, and therefore, the terminal device does not need to decode the synchronization information. Therefore, before the terminal equipment decodes the synchronous information, the identification of the adjacent cell served by the network equipment sending the synchronous information is obtained through the detection of the synchronous information, whether the terminal equipment has obtained the time information of the adjacent cell served by the network equipment sending the synchronous information can be accurately determined according to the identification of the adjacent cell, the terminal equipment decodes the synchronous information of the adjacent cell which does not obtain the time information, the number of the synchronous information which needs to be decoded by the terminal equipment is reduced, and the efficiency of searching the adjacent cell by the terminal equipment is improved.
Based on the embodiment shown in fig. 2, the cell search method will be described in detail below with reference to fig. 5.
Fig. 5 is a flowchart illustrating another cell search method according to an embodiment of the present application. Referring to fig. 5, the method may include:
s501, receiving the synchronization information sent by the network equipment.
The cell served by the network device is the first cell.
It should be noted that the execution process of S501 may refer to the execution process of S201, and is not described herein again.
S502, acquiring the identification of the first cell according to the synchronization information.
It should be noted that the execution process of S502 may refer to the execution process of S202, and is not described herein again.
S503, a cell identification set is obtained, wherein the cell identification set comprises the cell identification for obtaining the time information.
Optionally, the cell identity set may be obtained according to the following feasible implementation manners: and the terminal equipment acquires a cell identifier set according to the cell identifier corresponding to the cell which has acquired the time information. For example, the cell where the terminal device acquires the current known time information is cell a, cell B, and cell C, and the cell identifier set includes cell identifiers corresponding to cell a, cell B, and cell C.
S504, if the cell identification set does not include the identification of the first cell, decoding the synchronization information to obtain the time information of the first cell.
If the cell identifier set does not include the identifier of the first cell, it indicates that the terminal device does not receive the synchronization information sent by the network device serving the first cell, and therefore, the terminal device can decode the synchronization information sent by the network device serving the first cell, and further obtain the time information of the first cell. Optionally, because the network device serving the first cell periodically sends the synchronization information, if the cell identifier set includes the identifier of the first cell, it indicates that the terminal device has obtained the time information of the first cell from other synchronization information sent by the network device serving the first cell, and at this time, the terminal device does not decode the synchronization information, so that the number of synchronization information that the terminal device needs to decode is reduced, and the efficiency of the terminal device in searching for the neighboring cell is improved.
And S505, adding the identifier of the first cell into the cell identifier set.
After the terminal device decodes the synchronization information to obtain the time information of the first cell, the terminal device may add the identifier of the first cell to the cell identifier set to obtain a new cell identifier set. Therefore, the synchronous information sent by the terminal equipment to the network equipment serving the same cell can be decoded only once, repeated decoding is avoided, and the efficiency of searching the adjacent cell by the terminal equipment is improved.
The embodiment of the application provides a cell search method, which receives synchronization information sent by a network device, wherein a cell served by the network device is a first cell, and acquires an identifier of the first cell according to the synchronization information. And acquiring a cell identification set, wherein the cell identification set comprises an identification of a cell for acquiring the time information, if the cell identification set does not comprise an identification of the first cell, decoding the synchronization information to acquire the time information of the first cell, and adding the identification of the first cell into the cell identification set. In the method, before the terminal device decodes the synchronization information, the identifier of the neighboring cell served by the network device sending the synchronization information is obtained by detecting the synchronization information, whether the terminal device has obtained the time information of the neighboring cell served by the network device sending the synchronization information is accurately determined according to the identifier of the neighboring cell and the cell identifier set, when the time information of the neighboring cell is not obtained, the terminal device decodes the synchronization information, and after the decoding is successful, the identifier of the cell is added to the cell identifier set, so that the synchronization information sent by the terminal device to the network device serving the same cell can be decoded only once, the number of the synchronization information required to be decoded by the terminal device is reduced, and the efficiency of the terminal device for searching the neighboring cell is improved.
On the basis of any of the above embodiments, the following describes the procedure of the above cell search method in detail by way of example with reference to fig. 6.
Fig. 6 is a process diagram of a cell search method according to an embodiment of the present application. Please refer to fig. 6, which includes a network device a, a network device B, a network device C and a terminal device. The network device a, the network device B and the network device C serve different cells, and the serving cells are neighboring cells of a cell where the terminal device is located.
Referring to fig. 6, the terminal device receives the SSB sent by the network device, and determines the identifier of the neighboring cell served by the network device sending the SSB according to the SSB. For example, the terminal device receives the SSB sent by the network device a, and obtains the identifier of the cell served by the network device a as the cell a according to the SSB sent by the network device a; the terminal equipment receives the SSB sent by the network equipment B and obtains the identification of the cell served by the network equipment B as the cell B according to the SSB sent by the network equipment B; the terminal device receives the SSB sent by the network device C, and obtains the identifier of the cell served by the network device C as the cell a according to the SSB sent by the network device C.
Referring to fig. 6, the terminal device obtains a neighbor cell identity set and a cell identity set. The adjacent cell identification set comprises a cell A, a cell B and a cell C, and the cell identification set comprises the cell A and the cell B. The terminal device can determine that the terminal device has acquired the time information of the cell a and the cell B according to the neighbor cell identifier set and the cell identifier set, so that the terminal device does not decode the SSB information sent by the network device a and the network device B, and the terminal device decodes the SSB sent by the network device C to obtain the time information of the cell C.
After the terminal device decodes the SSB sent by the network device C, the terminal device adds the identifier of the cell C to the cell identifier set, where the cell identifier set includes a cell a, a cell B, and a cell C. Therefore, before the terminal device decodes the SSB information sent by the network device, the SSB information is detected to obtain the identifier of the adjacent cell served by the network device sending the SSB information, whether the terminal device has obtained the time information of the adjacent cell served by the network device sending the SSB information can be accurately determined according to the identifier of the adjacent cell and the cell identifier set, when the time information of the adjacent cell is not obtained, the terminal device decodes the synchronization information, and after the decoding is successful, the identifier of the cell is added into the cell identifier set, so that the terminal device can only decode the synchronization information sent by the network device serving the same cell once, the number of the synchronization information needing to be decoded by the terminal device is reduced, and the efficiency of the terminal device for searching the adjacent cell is improved.
Fig. 7 is a schematic structural diagram of a cell search apparatus according to an embodiment of the present application. The cell search apparatus 10 may be provided in a terminal device. Referring to fig. 7, the cell search apparatus 10 may include a receiving module 11, an obtaining module 12, and a processing module 13, where:
the receiving module 11 is configured to receive synchronization information sent by a network device, where a cell served by the network device is a first cell;
the obtaining module 12 is configured to obtain an identifier of the first cell according to the synchronization information;
the processing module 13 is configured to, if the time information of the first cell is not obtained, perform decoding processing on the synchronization information to obtain the time information of the first cell.
In a possible implementation, the obtaining module 12 is specifically configured to:
and determining the identifier of the first cell according to the primary synchronization signal PSS and the secondary synchronization signal SSS.
In a possible implementation, the obtaining module 12 is specifically configured to:
and decoding the physical broadcast channel PBCH to acquire the time information.
In a possible implementation, the obtaining module 12 is specifically configured to:
acquiring a peak value of the secondary synchronization signal SSS;
and decoding the physical broadcast channel PBCH according to the peak value of the secondary synchronization signal SSS so as to acquire the time information.
In a possible implementation, the processing module 13 is specifically configured to:
acquiring a cell identification set, wherein the cell identification set comprises an identification of a cell acquiring time information;
and if the cell identifier set does not comprise the identifier of the first cell, decoding the synchronization information to acquire the time information of the first cell.
The cell search apparatus provided in the embodiment of the present application may implement the technical solutions shown in the foregoing method embodiments, and the implementation principles and beneficial effects thereof are similar, and are not described herein again.
Fig. 8 is a schematic structural diagram of another cell search apparatus according to an embodiment of the present application. On the basis of the embodiment shown in fig. 7, please refer to fig. 8, the cell search apparatus 10 further includes an adding module 14, where the adding module 14 is configured to:
adding the identity of the first cell to the set of cell identities.
In a possible implementation manner, if the time information of the first cell is obtained, the synchronization information is not decoded.
The cell search apparatus provided in the embodiment of the present application may implement the technical solutions shown in the foregoing method embodiments, and the implementation principles and beneficial effects thereof are similar, and are not described herein again.
The cell search device shown in the embodiment of the present application may be a chip, a hardware module, a processor, and the like. Of course, the cell search apparatus may have other forms, and the embodiment of the present application is not particularly limited thereto.
Fig. 9 is a schematic diagram of a hardware structure of a terminal device provided in the present application. Referring to fig. 9, the terminal device 20 may include: a processor 21 and a memory 22, wherein the processor 21 and the memory 22 may communicate; illustratively, the processor 21 and the memory 22 communicate via a communication bus 23, the memory 22 being configured to store program instructions, and the processor 21 being configured to invoke the program instructions in the memory to perform the cell search method as shown in any of the above-described method embodiments.
Optionally, the terminal device 20 may further comprise a communication interface, which may comprise a transmitter and/or a receiver.
Optionally, the Processor may be a Central Processing Unit (CPU), or may be another general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present application may be embodied directly in a hardware processor, or in a combination of the hardware and software modules in the processor.
A readable storage medium having a computer program stored thereon; the computer program is for implementing a cell search method as described in any of the embodiments above.
An embodiment of the present application provides a computer program product, which includes instructions that, when executed, cause a computer to execute the above cell search method.
All or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The aforementioned program may be stored in a readable memory. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid state disk, magnetic tape (magnetic tape), floppy disk (flexible disk), optical disk (optical disk), and any combination thereof.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processing unit of a general purpose computer, special purpose computer, embedded processor, or other programmable terminal device to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable terminal device, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable terminal equipment to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable terminal device to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.
In the present application, the terms "include" and variations thereof may refer to non-limiting inclusions; the term "or" and variations thereof may mean "and/or". The terms "first," "second," and the like in this application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. In the present application, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Claims (17)
1. A method of cell search, comprising:
receiving synchronization information sent by network equipment, wherein cells served by the network equipment comprise a first cell;
acquiring the identifier of the first cell according to the synchronization information;
and if the time information of the first cell is not obtained, decoding the synchronization information to obtain the time information of the first cell.
2. The method of claim 1, wherein the synchronization information comprises a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH); acquiring the identifier of the first cell according to the synchronization information, including:
and determining the identifier of the first cell according to the primary synchronization signal PSS and the secondary synchronization signal SSS.
3. The method of claim 2, wherein decoding the synchronization information to obtain the time information of the first cell comprises:
and decoding the physical broadcast channel PBCH to acquire the time information.
4. The method of claim 3, wherein decoding the physical broadcast channel PBCH to obtain the time information comprises:
acquiring a peak value of the secondary synchronization signal SSS;
and decoding the physical broadcast channel PBCH according to the peak value of the secondary synchronization signal SSS so as to acquire the time information.
5. The method according to any one of claims 1 to 3, wherein if the time information of the first cell is not obtained, performing a decoding process on the synchronization information to obtain the time information of the first cell comprises:
acquiring a cell identification set, wherein the cell identification set comprises an identification of a cell acquiring time information;
and if the cell identifier set does not comprise the identifier of the first cell, decoding the synchronization information to acquire the time information of the first cell.
6. The method of claim 5, wherein after the decoding process of the synchronization information, the method further comprises:
adding the identity of the first cell to the set of cell identities.
7. The method according to any one of claims 1-6, further comprising:
and if the time information of the first cell is obtained, the synchronous information is not decoded.
8. The cell search device is characterized by comprising a receiving module, an obtaining module and a processing module, wherein:
the receiving module is used for receiving synchronization information sent by network equipment, wherein a cell served by the network equipment is a first cell;
the acquisition module is used for acquiring the identifier of the first cell according to the synchronization information;
the processing module is configured to, if the time information of the first cell is not obtained, perform decoding processing on the synchronization information to obtain the time information of the first cell.
9. The apparatus of claim 8, wherein the synchronization information comprises a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH); the acquisition module is specifically configured to:
and determining the identifier of the first cell according to the primary synchronization signal PSS and the secondary synchronization signal SSS.
10. The apparatus of claim 9, wherein the obtaining module is specifically configured to:
and decoding the physical broadcast channel PBCH to acquire the time information.
11. The apparatus of claim 10, wherein the obtaining module is specifically configured to:
acquiring a peak value of the secondary synchronization signal SSS;
and decoding the physical broadcast channel PBCH according to the peak value of the secondary synchronization signal SSS so as to acquire the time information.
12. The apparatus according to any one of claims 8 to 10, wherein the processing module is specifically configured to:
acquiring a cell identification set, wherein the cell identification set comprises an identification of a cell acquiring time information;
and if the cell identifier set does not comprise the identifier of the first cell, decoding the synchronization information to acquire the time information of the first cell.
13. The apparatus of claim 12, further comprising an add module to:
adding the identity of the first cell to the set of cell identities.
14. The apparatus according to any of claims 8-13, wherein if the time information of the first cell is obtained, the synchronization information is not decoded.
15. A terminal device, comprising: a transceiver, a processor, a memory;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored by the memory to cause the processor to perform the cell search method of any of claims 1 to 7.
16. A computer-readable storage medium having stored thereon computer-executable instructions for implementing the cell search method of any one of claims 1 to 7 when executed by a processor.
17. A computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements a cell search method according to any one of claims 1 to 7.
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| US20180020415A1 (en) * | 2015-03-06 | 2018-01-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and device for improved cell synchronization |
| CN110521146A (en) * | 2017-07-28 | 2019-11-29 | Lg电子株式会社 | Receive the method and its equipment of synchronization signal block |
| CN110557239A (en) * | 2019-08-30 | 2019-12-10 | 北京展讯高科通信技术有限公司 | method and device for determining CRS (cell-specific reference signal) sequence |
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| WO2013005175A1 (en) * | 2011-07-07 | 2013-01-10 | Renesas Mobile Corporation | Improvements to wireless communication systems and methods |
| US20180020415A1 (en) * | 2015-03-06 | 2018-01-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and device for improved cell synchronization |
| CN110521146A (en) * | 2017-07-28 | 2019-11-29 | Lg电子株式会社 | Receive the method and its equipment of synchronization signal block |
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