CN113170385A - Method and device for searching cell - Google Patents

Method and device for searching cell Download PDF

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Publication number
CN113170385A
CN113170385A CN201980081943.2A CN201980081943A CN113170385A CN 113170385 A CN113170385 A CN 113170385A CN 201980081943 A CN201980081943 A CN 201980081943A CN 113170385 A CN113170385 A CN 113170385A
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frequency
frequency point
supporting
endc
cell
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CN113170385B (en
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匡雅斌
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • 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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  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a cell search method and a cell search device, which can enable a terminal device supporting ENDC to preferentially reside in a cell supporting ENDC, so as to acquire data service by using dual connection of 4G and 5G. The method comprises the following steps: acquiring a frequency sweeping result, wherein the frequency sweeping result comprises a plurality of frequency points; and determining the frequency point supporting ENDC in the frequency sweeping result, and preferentially searching the cell aiming at the frequency point supporting ENDC.

Description

Method and device for searching cell Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for cell search.
Background
According to the third generation partnership project (3 GPP), a 4G base station and a 4G core network are used for a networking mode of 4G and 5G dual connectivity (eNodeB-nodeb dual carrier, ENDC), and the 4G base station is used as an anchor point of a control plane, and the 5G base station is superimposed to perform user plane data transmission. The terminal equipment supporting double connection can simultaneously use the LTE base station and the 5G base station, so that the characteristic of good coverage of an LTE frequency band and the characteristic of rich resources of a 5G frequency spectrum can be fully utilized, and the peak transmission rate of the terminal equipment is improved.
However, the deployment of 5G networks by operators is gradually advancing, and in a relatively long time, the coverage of 4G networks is not reached by 5G base stations, and the wide-range deployment of 5G independent networking (SA) is slower. In the early period of 5G network deployment, a non-independent Networking (NSA) layout is preferably adopted, so that a large number of networks support endec and LTE cells which do not support endec. However, the terminal device may not preferentially camp in the cell supporting the endec to obtain the data service by using the existing cell search process, and the user experience is poor.
Disclosure of Invention
The application provides a cell search method and a cell search device, which can enable terminal equipment supporting ENDC to preferentially reside in a cell supporting ENDC, so that data service is acquired by using 5G and 4G double connection, and user experience can be improved.
In a first aspect, the present application provides a method for cell search, including: acquiring a frequency sweeping result, wherein the frequency sweeping result comprises a plurality of frequency points; and determining the frequency point supporting ENDC in the frequency sweeping result, and preferentially searching the cell aiming at the frequency point supporting ENDC.
By adopting the technical scheme, after the terminal equipment sweeps the frequency to obtain the frequency sweeping result, the judgment processing of whether the frequency points supporting ENDC exist in the frequency sweeping result is added. If the frequency points supporting ENDC and the frequency points not supporting ENDC coexist in the frequency sweeping result, the terminal equipment can preferentially initiate cell search aiming at the frequency points supporting ENDC, so that the probability that the terminal equipment preferentially resides in the cell supporting ENDC can be improved, the UE supporting ENDC can acquire data service by using 5G and 4G double connection, and the user experience is improved.
With reference to the first aspect, in some implementation manners of the first aspect, the preferentially performing cell search for frequency points supporting endec, where the frequency points included in the frequency sweeping result are arranged according to the size of frequency point energy, includes: adjusting the arrangement sequence of the frequency points contained in the frequency sweeping result to enable the frequency point supporting ENDC in the frequency sweeping result to be positioned in front of the frequency sweeping result; and sequentially searching the cells according to the adjusted arrangement sequence of the frequency points in the frequency sweeping result.
In a possible implementation manner, cell search is preferentially performed on frequency points supporting the ENDC, and the frequency points supporting the ENDC in the frequency sweeping results are adjusted to be the forefront of the frequency sweeping results after the frequency sweeping results are obtained, and then cell search is performed according to the sequence of the adjusted frequency points, so that the frequency points supporting the ENDC can be preferentially searched.
With reference to the first aspect, in certain implementations of the first aspect, the method further includes: after the first cell is successfully resided, judging whether a first frequency point of the first cell is contained in a historical frequency point list; and performing association processing on the first frequency point and the identification supporting the ENDC according to the judgment result.
With reference to the first aspect, in some implementation manners of the first aspect, the associating, according to the determination result, the first frequency point and the identifier supporting the endec, includes: when the first frequency point is contained in the historical frequency point list, judging whether the first frequency point is associated with and supports the ENDC identification; when the first frequency point is associated with the identifier supporting the ENDC, clearing the association relation between the first frequency point and the identifier supporting the ENDC; and after determining that the NG base station is successfully added to the LTE base station, establishing an association relation between the first frequency point and the identifier supporting ENDC.
When a terminal device resides in a cell (e.g., a first cell), it is first determined whether a frequency point of the first cell (hereinafter referred to as a first frequency point) is included in a historical frequency point list. And if the first frequency point is already contained in the historical frequency point list, continuously judging whether the first frequency point is associated with the identification supporting ENDC. And if the first frequency point is associated with the identifier supporting the ENDC, clearing the identifier supporting the ENDC, and then re-associating the first frequency point with the identifier supporting the ENDC after the successful addition of the NG base station to the LTE base station is determined in the follow-up process. Therefore, the first frequency point added with the identification supporting ENDC can be ensured to be that the LTE base station successfully adds the NG base station.
It should be noted that, in the present application, whether an identifier of a frequency point and an identifier of supporting the endec are associated may also be understood as whether the frequency point supports the endec. Alternatively, one frequency point is associated with an identifier supporting the endec, that is, the frequency point supports the endec, or the frequency point carries the identifier supporting the endec. Conversely, a frequency point is not associated with an identifier supporting the endec, that is, the frequency point does not support the endec, or when the frequency point does not carry the identifier supporting the endec.
With reference to the first aspect, in some implementation manners of the first aspect, the associating, according to the determination result, the first frequency point and the identifier supporting the endec, includes: when the first frequency point is not contained in the historical frequency point list, adding the first frequency point to the historical frequency point list; and when the LTE base station is determined to be successfully added with the NG base station, associating the first frequency point with the identification supporting ENDC.
When a terminal device resides in a cell (e.g., a first cell), it is first determined whether a frequency point of the first cell (i.e., a first frequency point) is included in a historical frequency point list. And if the first frequency point is not contained in the historical frequency point list, adding the first frequency point to the historical frequency point list. Subsequently, after the UE determines that the LTE base station successfully adds the NG base station, the first frequency point is associated with the identifier supporting the ENDC again. Therefore, the first frequency point added with the identification supporting ENDC can be ensured to be that the LTE base station successfully adds the NG base station.
With reference to the first aspect, in some implementations of the first aspect, the sweep result is obtained in a search phase as follows: a historical frequency point searching stage, a preferred frequency band searching stage or a full frequency band searching stage.
In the embodiment of the present application, the process of adjusting the frequency point supporting the endec to the forefront of the frequency point scanning result is not limited to which stage of the frequency point search. For example, in the historical frequency point searching stage, the preferred frequency band searching stage or the full frequency band searching stage may be adopted.
With reference to the first aspect, in some implementations of the first aspect, the determining a frequency point supporting the endec in the frequency sweeping result includes: determining whether a sweep frequency result contains a historical frequency point supporting ENDC and/or a cloud frequency point supporting ENDC configured by an operator; and determining the historical frequency point supporting the ENDC and/or the cloud frequency point supporting the ENDC configured by the operator in the frequency sweeping result as the frequency point supporting the ENDC.
The terminal equipment determines the frequency points supporting the ENDC in the frequency sweeping result, including determining whether the frequency sweeping result contains historical frequency points associated with the ENDC supporting identifier, and whether the frequency sweeping result contains cloud frequency points supporting the ENDC configured by an operator. And if the frequency points exist, the frequency points are the frequency points supporting ENDC in the frequency sweeping result.
With reference to the first aspect, in some implementations of the first aspect, the frequency sweeping result is obtained by performing frequency sweeping in a preferred frequency band searching stage, and the cell searching in the preferred frequency band stage includes: and adjusting the cloud frequency band supporting ENDC configured by the operator to the front of the preferred frequency band not supporting ENDC, and sequentially carrying out cell search on each frequency band according to the sequence of the adjusted frequency bands.
In this embodiment of the application, when an operator configures not only a preferred frequency band but also a cloud frequency band supporting the endec, the cloud frequency band supporting the endec is arranged before the preferred frequency band not supporting the endec, and the preferred frequency band not supporting the endec is arranged before other frequency bands or frequency points.
With reference to the first aspect, in certain implementations of the first aspect, the first cell belongs to a first non-independent networking, NSA, area, the method further comprising: performing frequency sweeping in a second NSA area for the first time, wherein the obtained frequency sweeping result comprises a first frequency point, and the first frequency point is associated with an identifier supporting ENDC; performing cell search aiming at the first frequency point to search a second cell; and after the second cell is successfully resided, clearing the association relation between the first frequency point and the identifier supporting the ENDC.
When the UE is swept for the first time in the second NSA area after spanning from one NSA area (the first NAS area) to another NSA area (the second NAS area), the UE preferentially tries to search the historical frequency points (for example, the first frequency points) which are kept in the first NAS area and support the ENDC. But as long as the UE successfully resides on the historical frequency point, the UE will clear the association relationship between the historical frequency point and the identity supporting ENDC. And, since the frequency band anchored by 5G is different between the second NSA area and the first NSA area, it is impossible for the LTE base station to successfully add the NG base station. This ensures that the UE will not initiate a search preferentially for the frequency points supporting endec in the first area when sweeping again in the second NSA area.
With reference to the first aspect, in certain implementations of the first aspect, the method further includes: performing cell search again in the second NSA area, and searching a first frequency point and at least one second frequency point; determining that no frequency point supporting ENDC exists in the first frequency point and the at least one second frequency point; and sequencing the first frequency point and the at least one second frequency point according to the energy of the frequency points, and searching cells according to the sequence of the sequenced frequency points.
When the UE initiates the frequency sweep again in the second NSA area, since the frequency point (e.g., the first frequency point) supporting the endec in the first area is no longer associated with the identifier supporting the endec, the UE will not initiate the cell search preferentially for the historical frequency point supporting the endec in the first area. Therefore, if the UE performs cell search again in the second NSA area, if there is no frequency point supporting the endec, the UE initiates cell search according to the energy size order of the frequency points.
In a second aspect, the present application provides an apparatus for cell search, which has the function of implementing the method in the first aspect and any possible implementation manner thereof. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions.
Optionally, the apparatus is a terminal device, or the apparatus is a chip or an integrated circuit.
Optionally, the device may also be a processor or a baseband device.
In a third aspect, the present application provides a terminal device comprising a processor and a memory. The memory is used for storing the computer program, and the processor is used for calling and executing the computer program stored in the memory, so that the terminal device executes the method in the first aspect or any possible implementation manner of the first aspect.
Optionally, the number of the processors is one or more, and the number of the memories is one or more.
Optionally, the terminal device further comprises a communication interface. The communication interface may be a transceiver or an input-output interface.
In a fourth aspect, the present application provides a computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of the first aspect or any possible implementation manner of the first aspect.
In a fifth aspect, the present application provides a chip comprising a processor. The processor is configured to read and execute the computer program stored in the memory to perform the method of the first aspect or any possible implementation manner of the first aspect.
Optionally, the chip further comprises a memory, the memory is connected with the processor through a circuit or a wire, and the memory is used for storing the computer program.
Further optionally, the chip further comprises a communication interface.
In a sixth aspect, the present application further provides a computer program product, which includes computer program code, when the computer program code runs on a computer, the computer is caused to execute the method in the first aspect and any one of the possible implementation manners.
In a seventh aspect, the present application further provides a wireless communication system, including the terminal device in the third aspect.
By adopting the technical scheme, when the terminal equipment initiates the cell search, whether the frequency points supporting ENDC are included in the frequency sweeping result is increased. If the frequency points supporting ENDC and the frequency points not supporting ENDC are in the frequency sweeping result, the terminal equipment can preferentially search the cell aiming at the frequency points supporting ENDC, so that the probability that the terminal equipment preferentially resides in the cell supporting ENDC can be effectively improved, the UE supporting ENDC can acquire data service by using 5G and 4G double connection, and the user experience is improved.
Drawings
Fig. 1 is an architecture diagram of an endec networking.
Fig. 2 is a schematic diagram of each stage of a network searching process of LTE.
Fig. 3 is a flowchart of LTE network searching.
Fig. 4 is an illustration of a UE maintaining a support endec flag after successful camping.
Fig. 5 is a schematic diagram of a cell search procedure provided in the present application.
Fig. 6 (a) and (b) are schematic flow charts of methods of cell search provided herein.
Fig. 7 is a schematic diagram of a network searching process when a UE crosses an NSA.
Fig. 8 is a schematic block diagram of an apparatus 500 for cell search provided in the present application.
Fig. 9 is a schematic structural diagram of a terminal device 1000 provided in the present application.
Detailed Description
The technical solution in the present application will be described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is an architecture diagram of an endec networking. As shown in fig. 1, after the UE camps on the LTE cell and enters the connected state, the LTE base station as the primary node determines whether to add the NR base station as the secondary node, so that the UE supporting 5G can use dual LTE and NR connections at the same time, thereby increasing the transmission rate.
It should be understood that 5G is also referred to as New Radio (NR). For example, a 5G network presented herein is also referred to as an NR network, and a 5G base station is also referred to as an NR base station.
The cell search (or, also called network search) of LTE is triggered by a non-access stratum (NAS) of the terminal device. The NAS issues a search type to a radio resource control layer (RRC). The RRC determines parameters to be delivered to a physical layer (PHY) according to the received search type, and the PHY performs cell search.
Hereinafter, NAS of LTE is referred to as LNAS, RRC of LTE is referred to as LRRC, and PHY of LTE is referred to as LPHY.
Referring to fig. 2, fig. 2 is a schematic diagram of stages of cell search for LTE. As shown in fig. 2, currently, the cell search types triggered by LNAS include three types, namely historical frequency point search, preferred frequency band search, and full frequency band search. Among them, the preferred band search is also called pref-band search, and the full band search is also called full band search. The sequence of cell search by the UE is a historical frequency point search stage, and the preferred frequency band search stage is entered under the condition that the UE does not reside successfully after the historical frequency point search. And entering a full-band searching phase when the preferred frequency band searching does not reside successfully. If the searching in the three stages fails, other modes can be adopted for cell searching, if the terminal equipment does not reside successfully, a new round of cell searching is started, and the historical frequency point searching stage is continued to be started.
Referring to fig. 3, fig. 3 is a detailed flowchart of LTE cell search. As shown in fig. 3, in the cell search flow of LTE, the search at each stage is explained as follows.
(1) Searching historical frequency points: frequency points where the UE has successfully camped previously (i.e., historical frequency points) are preferentially searched. Since the position of the UE does not change much in a short time, the historical frequency points are preferentially searched, and it is considered that a cell where the UE successfully resides before can be searched with a high probability.
(2) Preferred frequency band (pref-band) search: the operator may pre-configure some preferred frequency bands for the UE. The operator uses these preferred bands, and the LTE cell success rate, which is equivalent to instructing the UE to search preferentially for which bands in the current area, is relatively high. Therefore, in the preferred frequency band searching phase, the UE preferentially searches for the cells of the preferred frequency bands configured by the operator.
(3) Full band (full band) search: and the UE searches on the frequency bands in turn according to all LTE frequency bands supported by the UE. In general, full band searches are initiated only if neither of the first two types of searches were successful. The full band search is relatively long.
If the above three types of search are failed, the terminal device can also switch to other search modes for searching. And if the terminal equipment does not successfully reside after searching in other modes, the terminal equipment returns to the three search types of the LTE and starts a new round of search.
As can be seen from the cell search procedure of LTE shown in fig. 3, when a large number of 4G and 5G networks coexist, even if the terminal device supports the 5G capability, it is impossible to preferentially search for an LTE cell supporting endec.
The technical solution of the present application is described below.
According to the technical scheme, each stage of the LTE cell search process is reserved, and records for supporting ENDC of the historical frequency points and judgment of cloud frequency points configured by an operator and supporting ENDC are added on the basis. And the terminal equipment preferentially tries to support the LTE cell of the ENDC in the network searching stage.
It should be understood that the frequency points configured by the operator to support the endec are referred to as cloud frequency points.
In detail, the technical scheme of the application mainly adds the following two parts:
1. the historical frequency points support maintenance of the identity of the endec.
Specifically, the general principle of maintaining the identification that the historical frequency points support the endec is as follows:
(1) and after the UE successfully resides in the cell, adding the frequency point of the resident cell into the historical frequency point list.
(2) After the UE successfully resides in each time, if the frequency point of the resident cell is the historical frequency point and is marked as supporting ENDC, the UE firstly clears the identification of the frequency point supporting ENDC. After the LTE base station successfully adds a Next Generation (NG) base station, the UE adds an identifier supporting the endec to the frequency point.
In this embodiment of the present application, alternatively, the UE adds an identifier supporting the endec to one frequency point, that is, the UE associates the frequency point with the identifier supporting the endec, or the UE marks the frequency point as the frequency point supporting the endec. Conversely, if the UE clears the association relationship between a frequency point and the identifier supporting the endec, that is, the UE clears the identifier supporting the endec carried by the frequency point, or the UE marks the frequency point as a frequency point that does not support endec.
Referring to fig. 4, fig. 4 is a diagram illustrating an identity of a UE maintaining a camped cell supporting an endec after successful camping. As shown in fig. 4, after the UE successfully camps on the cell, it is first determined whether the frequency point of the camped cell is already included in the historical frequency point list. If the frequency point of the residential cell is already contained in the historical frequency point list, the UE judges whether the frequency point of the residential cell is marked as supporting ENDC (or whether the frequency point of the residential cell carries an identifier supporting ENDC). And if the frequency point of the resident cell is marked to support the ENDC, the UE clears the identification that the frequency point of the resident cell supports the ENDC. And then, the UE judges whether the LTE base station successfully adds the NG base station.
After the UE successfully resides in the cell, if the frequency point of the resident cell is determined not to be contained in the historical frequency point list, the UE adds the frequency point of the resident cell into the historical frequency point list. And then, the UE judges whether the LTE base station successfully adds the NG base station.
And if the UE determines that the LTE base station successfully adds the NG base station, the UE adds an ENDC supporting identifier for the frequency point of the resident cell in the historical frequency point list.
2. And the UE adds judgment processing on the historical frequency points supporting the ENDC and the cloud information supporting the ENDC in the cell searching process.
Here, the cloud information supporting the endec includes a cloud frequency point supporting the endec and a cloud frequency band supporting the endec. Similar to the concept of cloud frequency points introduced above, a cloud frequency band refers to a preferred frequency band configured by an operator.
The operator can configure cloud frequency points supporting ENDC, and also can configure cloud frequency points not supporting ENDC. Similarly, an operator may configure a cloud frequency band supporting the endec, and may also configure a cloud frequency point not supporting the endec.
The following describes, with reference to fig. 5, a principle of determining and processing a history frequency point supporting the endec and a cloud frequency point supporting the endec by the UE in a search process.
Referring to fig. 5, fig. 5 is a schematic diagram of a cell search process provided in the present application.
(1) And searching the historical frequency points and the cloud frequency points in a historical frequency point searching stage. And sequencing the frequency points in the frequency sweeping result according to the energy size, and adjusting the historical frequency points supporting ENDC or the cloud frequency points supporting ENDC in the frequency sweeping result to the forefront of the frequency sweeping result. And the UE initiates cell search for each frequency point in sequence according to the adjusted arrangement sequence of each frequency point.
It can be understood that, since the historical frequency points supporting the endic or the cloud frequency points supporting the endic in the frequency sweeping result are adjusted to the forefront of the frequency sweeping result, the UE preferentially performs cell search on the historical frequency points supporting the endic and/or the cloud frequency points supporting the endic. And if the cell search of the historical frequency points supporting the ENDC and the cloud frequency points supporting the ENDC fails, then performing cell search on the rest frequency points in the frequency sweeping result.
(2) In the preferred frequency band searching stage, a round of historical frequency point searching is performed according to the searching principle in the historical frequency point searching stage described in the above (1). And if the historical frequency point search fails, the preferred frequency band search is carried out. When searching the preferred frequency band, if the sweep frequency result contains the historical frequency points supporting the ENDC or the cloud frequency points supporting the ENDC, the frequency points supporting the ENDC are preferentially subjected to cell search according to the frequency point sequence (which is sequenced according to the energy of the frequency points) reported by the physical layer. After the cell search of the frequency points supporting the ENDC fails, the cell search of the rest frequency points is initiated. And if the frequency sweeping result does not contain the frequency points supporting ENDC, initiating cell search for the frequency points in the frequency sweeping result in sequence.
(3) In the full-band searching stage, historical frequency points and cloud frequency points are searched for one round of historical frequency point according to the searching principle of the historical frequency point searching stage described in the step (1). And if the historical frequency point search fails, performing full-band search. When searching the full frequency band, if the sweep frequency result contains the historical frequency points supporting the ENDC or the cloud frequency points supporting the ENDC, the frequency points are preferentially subjected to cell search according to the frequency point sequence (which is sequenced according to the energy of the frequency points) reported by the physical layer. Otherwise, initiating cell search for the rest frequency points.
The following describes a cell search process performed by UE based on the maintenance history frequency point supported identities of the endec and the processing principle of the UE at each network search stage.
Referring to fig. 6, (a) and (b) of fig. 6 are schematic flow charts of methods of cell search provided herein. Fig. 6 (a) shows a history frequency point search stage and a preferred frequency band search stage, and (b) shows a full frequency band search stage.
In the embodiment shown in fig. 6, it is assumed that an operator configures a cloud point supporting endec. Meanwhile, the preferred frequency band refers to a frequency band configured by an operator but not supporting the endec.
See the historical frequency point search stage and the preferred frequency band search stage shown in fig. 6 (a).
1. And a historical frequency point searching stage.
(1) Assuming that an LTE cell (hereinafter referred to as cell 1) exists in the environment, the frequency point (hereinafter referred to as f) of the cell 1 is stored in the history frequency point list1) And f1 carries an identification of support for ENDC. Alternatively, f1 does not belong to the historical frequency point list, but f1The cloud frequency points which are configured by an operator and support ENDC.
(2) Suppose that another LTE cell (denoted as cell 2) exists in the environment, and the frequency point (denoted as f hereinafter) of cell 22) Contained in the historical frequency point list, but f2Does not carry an identification supporting ENDC, and f2Nor belong to frequency points supporting endec configured by the operator.
(3) Cell 2 has a stronger signal than cell 1, and both cell 1 and cell 2 belong to cells where the UE can camp.
And the LNAS of the UE issues a network searching request and a network searching type indication to the LRRC, wherein the network searching type indication is specifically historical frequency point searching. After the LRRC receives the instruction of searching the historical frequency points, all the currently stored historical frequency points are issued to the LPHY, and the LPHY performs Received Signal Strength Indication (RSSI) frequency sweeping on the historical frequency points once. And the LPHY reports the frequency sweeping result to the LRRC, and the frequency sweeping result comprises the searched RSSI and the corresponding frequency point number which are returned to the LRRC. And the frequency points in the frequency sweeping result are sequenced according to the RSSI of each frequency point. According to the above assumptions, the scanning result reported by the LPHY includes the frequency point f1And f2And the respective RSSI. Since cell 2 has a stronger signal than cell 1, i.e. f2RSSI of is greater than f1RSSI of, therefore, reported at the LPHYIn the coarse scanning result of (2), f1Is arranged at f2And then.
The LRRC determines whether the frequency sweeping result (also referred to as a coarse sweeping result) contains a historical frequency point supporting the endec or a cloud frequency point supporting the endec configured by an operator. If the frequency points exist, the frequency points (including historical frequency points and cloud frequency points) supporting the ENDC are adjusted to the forefront of the frequency sweeping result. For example, LRRC judges f1RSSI of less than f2RSSI of (1), but due to f1Belonging to frequency points supporting ENDC, LRRC will convert f1Is adjusted to f2Before (c) is performed. In other words, LRRC selects LPHY priority issue f1Cell search of (1).
Of course, if there are multiple frequency points supporting the endec, the frequency points supporting the endec may be sorted according to the RSSI.
The LPHY preferentially initiates cell search for frequency points supporting endec. If f is1The cell is successfully resided and the network searching is finished.
And if f1If the cell residence fails and the network searching in the historical frequency point searching stage fails, the preferred frequency band searching stage is entered.
2. The frequency band search phase is preferred.
As described above, the preferred frequency band described in the embodiment of fig. 6 refers to a preferred frequency band that does not support endec.
(1) Suppose there is an LTE cell (hereinafter referred to as cell 3) in the environment, and the frequency point of cell 3 is f3。f 3Has been included in the list of historical frequency points and f3Carrying an identification of supporting the ENDC. Or, frequency point f3Not included in the historical frequency point list, but f3The cloud frequency points which are configured by an operator and support ENDC.
(2) Suppose that another LTE cell (hereinafter referred to as cell 4) exists in the environment, and the frequency point of cell 4 is f4。f 4Contained in the list of historical frequency points but not carrying an identification of supporting ENDC, f4And also does not belong to the cloud frequency points supporting ENDC configured by the operator.
(3) Cell 4 is stronger in signal than cell 3, and both cell 3 and cell 4 belong to cells where the UE can camp.
Before searching the preferred frequency band, the UE first performs a historical frequency point search (see the description of the previous stage), and enters the preferred frequency band search stage when the historical frequency point search fails again.
After the preferred frequency band search starts, the UE initiates a cell search for the operator configured preferred frequency band. Specifically, the LPHY sequence initiates a coarse sweep of the preferred frequency band. The LPHY sends the frequency sweeping result to the LRRC, and the rough scanning result contains the searched RSSI and the frequency point of the RSSI. The frequency points contained in the frequency sweeping result are sequenced according to the RSSI of each frequency point. According to the above assumptions, the frequency sweep result includes f3And f4And a respective corresponding RSSI. Since cell 4 has a stronger signal than cell 3, i.e., f4RSSI of is greater than f3RSSI of (c). Thus, in the sweep result, f4Is arranged at f3Before (c) is performed.
The LRRC judges whether the frequency sweeping result contains the historical frequency points supporting the ENDC or the cloud frequency points supporting the ENDC configured by the operator. If so, the frequency points supporting ENDC are arranged to the forefront of the frequency sweeping result. For example, LRRC judges f3Belonging to historical frequency points supporting ENDC, or f3Belong to the cloud frequency point supporting ENDC configured by the operator even if f3RSSI of (1) is less than RSSI of f4, LRRC will still be f3Is adjusted to f4Before (c) is performed. Therefore, LRRC selects to preferentially issue the frequency point f to LPHY3Cell search of (1).
If f is3If the cell is successfully resided, the network searching process is ended. If f is3If the cell residence fails and the network searching in the preferred frequency band stage fails, the full-frequency band network searching stage is entered.
See the full band search phase shown in (b) of fig. 6.
3. And (5) a full-band searching stage.
(1) Suppose there is one LTE cell in the environment (hereinafter referred to asCell 5), the frequency point of cell 5 is f5。f 5Contained in the list of historical frequency points, and f5Carrying an identification of supporting the ENDC. Or, frequency point f5Not included in the historical frequency point list, but f5The cloud frequency points which are configured by an operator and support ENDC.
(2) Assuming that another LTE cell (hereinafter referred to as cell 6) exists in the environment, the frequency point of cell 6 is f6。f 6Contained in the list of historical frequency points, but does not carry an identification of supporting endec. And, frequency point f6And the cloud frequency points which are configured by the operator and support the ENDC are not included.
(3) Cell 6 has a stronger signal than cell 5 and both cell 5 and cell 6 belong to the cells where it can camp.
Before entering full-band search, one-time historical frequency point search is carried out, and when the search fails again, a full-band network searching stage is entered.
After the full-band search is started, the LRRC issues the frequency bands supported by the UE to the LPHY. The LPHY sequence initiates a coarse sweep of these bands. And the LPHY sends the frequency sweeping result to the LRRC, and the frequency sweeping result contains the searched RSSI and the frequency point of the RSSI. The frequency sweeping results reported by the LPHY are sorted according to the RSSI of each frequency point. According to the assumption, the frequency sweep result contains f5And f6And the respective RSSI. Since cell 6 has a stronger signal than cell 5, i.e., f6RSSI of is greater than f5RSSI of (c). Thus, in the coarse scanning result, f6Is arranged at f5Before (c) is performed.
The LRRC judges whether the frequency sweeping result contains the historical frequency points supporting the ENDC or the cloud frequency points supporting the ENDC. If present, LRRC adjusts these ENDC-capable frequency bins to the forefront of the sweep result. For example, LRRC judges f5Belonging to historical frequency points supporting ENDC, or f5The cloud frequency points support ENDC. Even if f5RSSI of less than f6With RSSI, LRRC still selects direction f5Is adjusted to f6Of (3), i.e. LRRC selectionPreferentially issuing frequency point f to LPHY5Cell search of (1).
If f is5If the network searching is successful, the network searching process is ended. If f is5The network searching fails, and the full-band network searching fails, and the UE may also perform network searching in other modes. If the cell is not successfully resided, the UE starts a new round of cell search.
Fig. 6 above is a detailed process of cell search provided in the present application.
By adopting the technical scheme, the terminal equipment adds the judgment processing of whether the historical frequency point supports ENDC and whether the cloud frequency point configured by an operator supports ENDC in the process of cell search. If a cell supporting ENDC and a cell not supporting ENDC coexist in the environment, the terminal equipment can preferentially search the cell for the historical frequency point supporting ENDC and the cloud frequency point supporting ENDC, so that the probability that the terminal equipment preferentially resides in the cell supporting ENDC can be effectively improved, the UE supporting ENDC can acquire data service by using 5G and 4G double connection, and the user experience is improved.
In another embodiment, assuming that the operator only configures the cloud frequency band supporting the endec, compared with the cloud frequency points configured by the operator to support the endec in fig. 6, the stages of the cell search will be different as follows:
1. in the historical frequency point searching stage.
After the LRRC receives the frequency sweeping results reported by the LPHY (the frequency sweeping results are sorted according to the RSSI (received signal strength indicator) of each frequency point), only whether the frequency sweeping results contain the historical frequency points supporting ENDC (enhanced noise immunity) is judged. And if so, adjusting the historical frequency points supporting the ENDC to the forefront of the frequency sweeping result.
Optionally, if there are multiple historical frequency points supporting the endec, the multiple frequency points supporting the endec are sorted according to the RSSI.
The LRRC preferentially issues the cell search of the historical frequency points supporting ENDC to the LPHY.
2. In the preferred frequency band search phase.
(1) The LRRC ranks the operator configured cloud bands supporting the endec to the forefront of all cloud bands (i.e., operator configured preferred bands), and then the LRRC issues the band rough scan in sequence.
(2) And after the LRRC receives the frequency sweeping result reported by the LPHY, only judging whether historical frequency points supporting ENDC exist in the cloud frequency points contained in the frequency sweeping result. If the ENDC supporting historical frequency points exist, the ENDC supporting historical frequency points are arranged to the forefront of the frequency sweeping result.
The LRRC preferentially issues the cell search of the historical frequency points supporting ENDC to the LPHY.
3. In the full-band search stage:
and after the LRRC receives the frequency sweeping result reported by the LPHY, only judging whether the frequency points contained in the frequency sweeping result have the historical frequency points supporting ENDC. If the ENDC supporting historical frequency points exist, the ENDC supporting historical frequency points are arranged to the forefront of the frequency sweeping result.
The LRRC preferentially issues the cell search of the historical frequency points supporting ENDC to the LPHY.
The processing principle and other steps of the UE in each search phase are the same as (a) and (b) in fig. 6, and are not described herein again.
Furthermore, the present application contemplates that one deployment strategy for the endec may be: in the NSA scenario, the mobile network side anchors 5G to a fixed LTE band (LTE band), but does not anchor to all LTE bands. But in different NSA regions, the 5G anchored LTE band is different. Then, after a historical frequency point supporting the endec reaches a new NSA area, the endec may not be supported any more, and therefore the UE needs to update the information whether the stored historical frequency point supports endec.
The above-introduced maintenance principle that the historical frequency points support the identities of the endecs can ensure that the UE preferentially selects the LTE cell supporting endec when the NSA area is crossed.
The network searching process after the UE moves from one NSA to another NSA is described below with reference to fig. 7.
Referring to fig. 7, fig. 7 is a schematic diagram of a network searching process when a UE crosses an NSA.
Firstly, assuming a scene, in the area A, the LPHY of the UE searches the available frequency point f7And to f7And carrying out cell search to search a cell 7. LRRC of UE will f7And adding the frequency points into a historical frequency point list. Subsequently, if the NG base station is successfully added to the LTE base station, the LRRC is f7An identity supporting the ENDC is added.
In the case that the UE re-initiates network searching for some reason, such as signal interruption or shutdown and restart, the UE may move to the area B. However, the UE cannot know the change of the NSA area. And the UE initiates the first network searching in the area B according to the normal network searching process. Due to f7Stored in the historical frequency point list, therefore, the LRRC of the UE will preferentially issue f to LPHY7Cell search of (1). LPHY preferred pair f7And carrying out cell search to search the cell 8. Thereafter, the UE successfully camps on cell 8.
According to the maintenance principle of the identification supporting ENDC of the historical frequency point provided by fig. 4, once the UE successfully resides in one frequency point, the identification supporting ENDC of the frequency point is removed.
Therefore, after the UE successfully camps on the cell 8, the LRRC of the UE will clear the identifier of f7 supporting the endec in the historical frequency point list.
Subsequently, if the LTE base station successfully adds the NG base station, the LRRC will add the identity supporting the endec to f7 again. However, as already described above, since the frequency bands anchored by 5G are not the same in area B and area a, it is not possible for the LTE base station to successfully add an NG base station after the UE camps on cell 8. Thus, in region B, f7And may not be relabeled as supporting endec.
When UE initiates network searching again in the area B, if the historical frequency point f is scanned7And f8Due to f7There is no identification of ENDC support, so the priority pair f will not appear7The cell search is performed.
And the UE firstly clears the identification which supports ENDC and is carried by the historical frequency points after finishing cell residence each time. Subsequently, if the LTE base station successfully adds the NG base station, the identifier supporting ENDC is added to the historical frequency point again, and the fact that the identifier supporting ENDC of the historical frequency point is marked after the NG base station is successfully added can be ensured.
After the UE crosses from one NSA area (first NAS area) to another NSA area (second NAS area), although a network search is performed in the second NSA area for the first time, the UE still preferentially tries to search the historical frequency points supporting the endec stored in the first NAS area, but as long as the historical frequency points are successfully camped, the UE will remove the identifier of the historical frequency points supporting the endec. Moreover, since the frequency band anchored by 5G is different between the second NSA area and the first NSA area, it is ensured that the LTE base station does not successfully add an NG base station. Therefore, the UE initiating a search for the network again in the second NSA area will not initiate a search preferentially for the historic frequency points supporting the endec in the first area.
The method of cell search of the present application is explained in detail above.
By adopting the technical scheme, the terminal equipment adds the judgment processing of whether the historical frequency point supports ENDC and whether the cloud frequency point configured by an operator supports ENDC in the process of cell search. If a cell supporting ENDC and a cell not supporting ENDC coexist in the environment, the terminal equipment can preferentially search the cell for the historical frequency point supporting ENDC and the cloud frequency point supporting ENDC, so that the probability that the terminal equipment preferentially resides in the cell supporting ENDC can be effectively improved, the UE supporting ENDC can acquire data service by using 5G and 4G double connection, and the user experience can be improved.
The method for cell search provided in the present application is described in detail above with reference to fig. 1 to 7. The following describes an apparatus for cell search provided in the present application.
Referring to fig. 8, fig. 8 is a schematic block diagram of an apparatus 500 for cell search provided in the present application. As shown in fig. 8, the apparatus 500 includes a processing unit 510 and a transceiving unit 520.
The processing unit 510 is configured to obtain a frequency sweeping result, and determine a frequency point supporting the endec in the frequency sweeping result, where the frequency sweeping result includes multiple frequency points;
a transceiver unit 520, configured to preferentially perform cell search for the frequency points supporting the endec.
In an embodiment, the frequency points included in the frequency sweeping result are arranged according to the size of the frequency point energy, and the processing unit 510 is specifically configured to adjust the arrangement order of the frequency points included in the frequency sweeping result, so that the frequency point supporting the endec in the frequency sweeping result is located in front of the frequency sweeping result; the transceiver 520 is specifically configured to perform cell search in sequence according to the adjusted arrangement order of the frequency points.
In an embodiment, the processing unit 510 is further configured to, after the apparatus successfully camps on the first cell, determine whether the first frequency point of the first cell is included in the historical frequency point list, and perform association processing on the first frequency point and the identifier supporting the endec according to a determination result.
Optionally, the processing unit 510 is specifically configured to, when the first frequency point is included in the historical frequency point list, determine whether the first frequency point is associated with an identifier supporting the endec; when the first frequency point is associated with the identifier supporting the ENDC, clearing the association relation between the first frequency point and the identifier supporting the ENDC; and when the LTE base station is determined to be successfully added with the NG base station, associating the first frequency point with the identification supporting ENDC.
Optionally, the processing unit 510 is specifically configured to, when the first frequency point is not included in the historical frequency point list, add the first frequency point to the historical frequency point list; and when the LTE base station is determined to be successfully added with the NG base station, associating the first frequency point with the identification supporting ENDC.
Optionally, the processing unit 510 is specifically configured to determine whether a historical frequency point carrying an identifier that supports the endec exists in the frequency sweeping result, and/or a cloud frequency point configured by an operator and supporting the endec exists, and determine, as the frequency point supporting the endec, the historical frequency point carrying the identifier that supports the endec among the historical frequency points and/or the cloud frequency point configured by the operator and supporting the endec.
Optionally, the processing unit 510 is specifically configured to adjust the cloud frequency band configured by the operator and supporting the endec to a position before the preferred frequency band not supporting the endec, and the transceiver unit 520 is configured to sequentially perform cell search on each frequency band according to the sequence of the adjusted frequency bands.
Optionally, the transceiver unit 520 is further configured to perform frequency sweeping in the second NSA area for the first time, where an obtained frequency sweeping result includes a first frequency point, and the first frequency point carries an identifier supporting the endec; performing cell search aiming at the first frequency point to search a second cell; and the processing unit 510 is further configured to clear the association relationship between the first frequency point and the identifier supporting the endec after the apparatus successfully camps on the second cell.
Optionally, the transceiver unit 520 is further configured to perform frequency sweeping again in the second NSA area, where the obtained frequency sweeping result includes the first frequency point and at least one second frequency point; the processing unit 510 is further configured to determine that no frequency point supporting the endec exists in the first frequency point and the at least one second frequency point; and the transceiver unit 520 is further configured to perform cell search on the first frequency point and the at least one second frequency point according to the energy of the frequency points from large to small.
In one embodiment, the apparatus 500 may be a chip or an integrated circuit.
The chip described in this embodiment of the present application may be a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Microcontroller (MCU), a Programmable Logic Device (PLD), or other integrated chips.
In this case, the processing unit 510 may be a processor. The transceiving unit 520 may be a communication interface or transceiving circuit.
Optionally, the communication interface comprises an input output interface. The transceiver circuitry may include receive circuitry and transmit circuitry.
In another embodiment, the apparatus 500 may correspond to a terminal device in each method embodiment of cell search provided in the present application. The apparatus 500 includes respective units for implementing corresponding operations and/or processes performed by the terminal device in the respective method embodiments. In this case, the processing unit 510 may be a processor. The transceiving unit 520 may be a transceiver.
Alternatively, the transceiver may include a receiver and a transmitter, having both the function of transmitting and receiving signals.
Alternatively, the processing unit 510 may also be a processing device, and the functions of the processing device may be partially or completely implemented by software.
In one implementation, the functionality of the processing means may be implemented partly or wholly in software. At this time, the processing device may include a memory and a processor. The memory is used for storing computer programs, and the processor reads and executes the computer programs stored in the memory so as to execute the steps internally realized by the terminal equipment in each method embodiment.
In another implementation, a processing device includes a processor. The memory for storing the computer program is located outside the processing device and the processor is connected to the memory by means of circuits/wires to read and execute the computer program stored in the memory.
In yet another implementation, the functions of the processing device may all be implemented in hardware. At this time, the processing device may include an input interface circuit, a logic circuit, and an output interface circuit. The input interface circuit is used for acquiring a frequency sweeping result; and the logic circuit is used for determining whether the frequency points supporting ENDC exist in the frequency sweeping result. The output interface circuit is used for outputting the judgment result of the logic circuit.
Specifically, when the logic circuit determines that the frequency point supporting ENDC exists in the frequency sweeping result, the logic circuit outputs the frequency point supporting ENDC to the output interface circuit, and the frequency point supporting ENDC is output by the output interface circuit.
The present application further provides a terminal device 1000, which is described below with reference to fig. 9.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a terminal device 1000 provided in the present application. As shown in fig. 9, the terminal device 1000 includes an antenna 1101, a radio frequency device 1102, and a baseband device 1103. An antenna 1101 is connected to the radio frequency device 1102. In the uplink direction, the baseband device 1103 generates a signal to be sent to the network side, and sends the signal to the rf device 1102, and the rf device 1102 transmits the signal through the antenna 1101. In the downlink direction, the rf device 1102 receives a signal from the network side through the antenna 1101, and sends the received signal to the baseband device 1103 for processing.
In particular, the baseband device 1103 may include one or more processing units 11031. In addition, the baseband apparatus 1103 may further include a storage unit 11032 and a communication interface 11033. The storage unit 11032 is used to store programs and data. The communication interface 11033 is used to exchange information with the radio frequency device 1102. The communication interface 11033 may be an input-output interface or an input-output circuit.
Alternatively, memory unit 11032 may be on the same chip as processing unit 11031, i.e., an on-chip memory unit, or on a different chip than processing unit 11031, i.e., an off-chip memory unit.
Terminal device 1000 in the foregoing apparatus embodiment may completely correspond to the terminal device in the method embodiment, and corresponding units included in terminal device 1000 are used to execute corresponding operations and/or processes executed by the terminal device in the method embodiment.
For example, the processing unit 510 shown in fig. 8 may be implemented by the baseband device 1103 shown in fig. 9, and the transceiving unit 520 may be implemented by the radio frequency device 1102 shown in fig. 9.
Furthermore, the present application provides a computer-readable storage medium having stored thereon computer instructions, which, when executed on a computer, cause the computer to perform the respective operations and/or processes of any of the method embodiments.
The present application also provides a computer program product comprising computer program code to, when run on a computer, cause the computer to perform the respective operations and/or processes of any of the method embodiments of the present application.
The application also provides a chip comprising a processor. The processor is used for calling and running the computer program stored in the memory so as to execute the corresponding operation and/or processing of any method embodiment of the application.
Optionally, the chip further comprises a memory, the memory being connected to the processor. The processor is used for reading and executing the computer program in the memory.
Further optionally, the chip further comprises a communication interface, and the processor is connected to the communication interface. The communication interface is used for receiving signals and/or data needing to be processed, and the processor acquires the signals and/or data from the communication interface and processes the signals and/or data.
Optionally, the communication interface may be an input-output interface, and may specifically include an input interface and an output interface. Alternatively, the communication interface may be a transceiver circuit, and may specifically include a receiving circuit and a transmitting circuit.
The memory and the storage referred to in the above embodiments may be physically separate units, or the memory and the processor may be integrated together.
In the above embodiments, the processor may be a Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs according to the present disclosure. For example, the processor may be a digital signal processor device, a microprocessor device, an analog-to-digital converter, a digital-to-analog converter, or the like. The processor may distribute the functions of control and signal processing of the terminal device or the network device among these devices according to their respective functions. Further, the processor may have the functionality to operate one or more software programs, which may be stored in the memory. The functions of the processor can be realized by hardware, and can also be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.
The memory may be a read-only memory (ROM), other types of static storage devices that may store static information and instructions, a Random Access Memory (RAM), or other types of dynamic storage devices that may store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, etc.
In the embodiment of the present application, "and/or" describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The elements described as separate components may or may not be physically separate. The components displayed as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units can be selected according to actual needs to implement the technical solution of the present embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (22)

  1. A method of cell search, comprising:
    acquiring a frequency sweeping result, wherein the frequency sweeping result comprises a plurality of frequency points;
    and determining the frequency point supporting ENDC in the frequency sweeping result, and preferentially searching the cell aiming at the frequency point supporting ENDC.
  2. The method of claim 1, wherein a plurality of frequency points included in the sweep result are arranged according to the energy of the frequency points, and the preferentially performing cell search for the frequency points supporting the endec comprises:
    adjusting the arrangement sequence of the frequency points contained in the frequency sweeping result to enable the frequency point supporting ENDC in the frequency sweeping result to be positioned in front of the frequency sweeping result;
    and carrying out cell search in sequence according to the adjusted arrangement sequence of the frequency points.
  3. The method according to claim 1 or 2, characterized in that the method further comprises:
    after the first cell is successfully resided, judging whether a first frequency point of the first cell is contained in a historical frequency point list or not;
    and performing association processing on the first frequency point and the identification supporting ENDC according to the judgment result.
  4. The method of claim 3, wherein the associating the first frequency point and the identifier supporting ENDC according to the determination result includes:
    when the first frequency point is contained in a historical frequency point list, judging whether the first frequency point is associated with the ENDC supporting identifier;
    when the first frequency point is associated with the identifier supporting ENDC, clearing the association relation between the first frequency point and the identifier supporting ENDC;
    and after determining that the NG base station is successfully added to the LTE base station, establishing an association relation between the first frequency point and the identifier supporting the ENDC.
  5. The method of claim 3, wherein the associating the first frequency point and the identifier supporting ENDC according to the determination result includes:
    when the first frequency point is not contained in a historical frequency point list, adding the first frequency point to the historical frequency point list;
    and associating the first frequency point with the identifier supporting ENDC after the LTE base station is determined to be successfully added with the NG base station.
  6. Method according to any of claims 1-5, characterized in that the sweep results are obtained in the following search phase:
    a historical frequency point searching stage, a preferred frequency band searching stage or a full frequency band searching stage.
  7. The method according to any one of claims 1 to 6, wherein the determining the frequency points supporting ENDC in the frequency sweep result comprises:
    determining whether the frequency sweeping result contains a historical frequency point supporting ENDC and/or a cloud frequency point supporting ENDC configured by an operator;
    and determining the historical frequency point supporting the ENDC and/or the cloud frequency point supporting the ENDC configured by the operator contained in the frequency sweeping result as the frequency point supporting the ENDC.
  8. The method according to claim 6 or 7, wherein the frequency sweeping result is obtained by performing frequency sweeping in a preferred frequency band searching stage, and the performing cell search in the preferred frequency band stage comprises:
    and adjusting the cloud frequency band supporting ENDC configured by the operator to the front of the preferred frequency band not supporting ENDC, and sequentially carrying out cell search on each frequency band according to the sequence of the adjusted frequency bands.
  9. The method according to any of claims 4-8, wherein the first cell belongs to a first non-standalone networking, NSA, area, the method further comprising:
    performing frequency sweeping in a second NSA area for the first time, wherein the obtained frequency sweeping result comprises the first frequency point, and the first frequency point is associated with the identifier supporting ENDC;
    performing cell search aiming at the first frequency point to search a second cell;
    and after the second cell is successfully resided, clearing the association relation between the first frequency point and the identifier supporting ENDC.
  10. The method of claim 9, further comprising:
    performing frequency sweeping again in the second NSA area, wherein the obtained frequency sweeping result comprises the first frequency point and at least one second frequency point;
    determining that no frequency point supporting ENDC exists in the first frequency point and the at least one second frequency point;
    and performing cell search on the first frequency point and the at least one second frequency point according to the sequence of the energy of the frequency points from large to small.
  11. An apparatus for cell search, comprising:
    the frequency sweeping device comprises a processing unit, a frequency sweeping unit and a frequency selecting unit, wherein the processing unit is used for acquiring a frequency sweeping result and determining frequency points supporting ENDC in the frequency sweeping result, and the frequency sweeping result comprises a plurality of frequency points;
    and the transceiver unit is used for preferentially searching the cell aiming at the frequency points supporting ENDC.
  12. The apparatus of claim 11, wherein the frequency points included in the frequency sweeping result are arranged according to the energy of the frequency points,
    the processing unit is specifically configured to adjust an arrangement order of frequency points included in the frequency sweeping result, so that the frequency point supporting the endec in the frequency sweeping result is located in front of the frequency sweeping result;
    the transceiver unit is specifically configured to perform cell search in sequence according to the adjusted arrangement order of the frequency points.
  13. The apparatus according to claim 11 or 12, wherein the processing unit is further configured to:
    after the device successfully resides in a first cell, judging whether a first frequency point of the first cell is contained in a historical frequency point list, and performing association processing on the first frequency point and an identifier supporting ENDC according to a judgment result.
  14. The apparatus according to claim 13, wherein the processing unit is specifically configured to:
    when the first frequency point is contained in the historical frequency point list, judging whether the first frequency point is associated with an identifier supporting ENDC;
    when the first frequency point is associated with the identifier supporting ENDC, clearing the association relation between the first frequency point and the identifier supporting ENDC;
    and when the fact that the NG base station is successfully added to the LTE base station is determined, associating the first frequency point with the ENDC supporting identifier.
  15. The apparatus according to claim 13, wherein the processing unit is specifically configured to:
    when the first frequency point is not contained in the historical frequency point list, adding the first frequency point to the historical frequency point list;
    and associating the first frequency point with the identifier supporting ENDC after the LTE base station is determined to be successfully added with the NG base station.
  16. An apparatus as claimed in any one of claims 11 to 15, wherein the sweep results are obtained during a search phase comprising:
    a historical frequency point searching stage, a preferred frequency band searching stage or a full frequency band searching stage.
  17. The apparatus according to any one of claims 11-16, wherein the processing unit is specifically configured to:
    determining whether the frequency sweeping result contains a historical frequency point supporting ENDC and/or a cloud frequency point supporting ENDC configured by an operator;
    and determining the historical frequency point supporting the ENDC and/or the cloud frequency point supporting the ENDC configured by the operator contained in the frequency sweeping result as the frequency point supporting the ENDC.
  18. The apparatus according to claim 16 or 17, wherein the frequency sweeping result is obtained by performing frequency sweeping in a preferred frequency band searching stage, and the processing unit is configured to adjust an operator configured cloud frequency band supporting endec to a time before a preferred frequency band not supporting endec, and perform cell search on each frequency band in sequence according to the sequence of the adjusted frequency bands.
  19. The apparatus according to any of claims 14-18, wherein the first cell belongs to a first non-standalone networking, NSA, area, and wherein the transceiver unit is further configured to:
    performing frequency sweeping in a second NSA area for the first time, wherein the obtained frequency sweeping result comprises the first frequency point, and the first frequency point is associated with the identifier supporting ENDC;
    performing cell search aiming at the first frequency point to search a second cell;
    and the processing unit is further configured to clear an association relationship between the first frequency point and the identifier supporting the endec when the apparatus successfully camps on the second cell.
  20. The apparatus according to claim 19, wherein the transceiver unit is further configured to perform frequency sweeping again in the second NSA area, and an obtained frequency sweeping result includes the first frequency point and at least one second frequency point;
    the processing unit is further configured to determine that no frequency point supporting the endec exists in the first frequency point and the at least one second frequency point;
    the transceiver unit is further configured to perform cell search on the first frequency point and the at least one second frequency point according to a descending order of energy of the frequency points.
  21. A computer-readable storage medium, in which a computer program is stored which, when executed on a computer, causes the computer to carry out the method according to any one of claims 1-10.
  22. A chip comprising a memory for storing a computer program and a processor for reading and executing the computer program stored in the memory to perform the method of any one of claims 1 to 10.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113556800A (en) * 2021-09-23 2021-10-26 芯翼信息科技(上海)有限公司 Method, apparatus, medium, and device for searching network
CN113613294A (en) * 2021-07-28 2021-11-05 西安广和通无线软件有限公司 Network access method, device, terminal equipment and storage medium
CN114173361A (en) * 2021-12-13 2022-03-11 展讯通信（上海）有限公司 5G network searching method, device and terminal
CN114928865A (en) * 2022-05-12 2022-08-19 拉扎斯网络科技（上海）有限公司 Network switching method and device of cabinet taking router

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022160984A1 (en) * 2021-02-01 2022-08-04 华为技术有限公司 Method and apparatus for searching for cell
CN113993185A (en) * 2021-09-22 2022-01-28 深圳市广和通无线股份有限公司 Network searching method, network searching device, communication equipment and computer readable storage medium
CN113873598B (en) * 2021-10-15 2024-04-12 迈普通信技术股份有限公司 Network switching method, device, network equipment and storage medium
CN115052327B (en) * 2022-03-16 2023-10-20 北京小米移动软件有限公司 Network control method, device and storage medium
CN115002877A (en) * 2022-06-21 2022-09-02 维沃移动通信有限公司 Network searching method and device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102316551A (en) * 2010-06-29 2012-01-11 中兴通讯股份有限公司 Method and mobile terminal for achieving rapid frequency scanning
CN102355712A (en) * 2011-10-11 2012-02-15 中兴通讯股份有限公司 Method for accelerating searching speed of public land mobile network and device
CN105792249A (en) * 2014-12-26 2016-07-20 联芯科技有限公司 Web search ranking method and system
WO2017020591A1 (en) * 2015-08-03 2017-02-09 深圳市中兴微电子技术有限公司 Method of implementing continuous reception in enhanced multimedia broadcast multicast service and terminal utilizing same
US20190069226A1 (en) * 2017-08-24 2019-02-28 Qualcomm Incorporated Techniques and apparatuses for mobile network searching in multiple radio access technologies

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4534695B2 (en) * 2004-09-28 2010-09-01 日本電気株式会社 Mobile communication terminal device and frequency detection method thereof
CN103546940A (en) * 2012-07-17 2014-01-29 电信科学技术研究院 Method and device for searching cells in sensing system
CN106332231B (en) * 2015-06-29 2019-12-03 展讯通信（上海）有限公司 Mobile terminal small region search method and device
US11191016B2 (en) * 2016-08-11 2021-11-30 Samsung Electronics Co., Ltd. Service-based cell selection and reselection control method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102316551A (en) * 2010-06-29 2012-01-11 中兴通讯股份有限公司 Method and mobile terminal for achieving rapid frequency scanning
CN102355712A (en) * 2011-10-11 2012-02-15 中兴通讯股份有限公司 Method for accelerating searching speed of public land mobile network and device
CN105792249A (en) * 2014-12-26 2016-07-20 联芯科技有限公司 Web search ranking method and system
WO2017020591A1 (en) * 2015-08-03 2017-02-09 深圳市中兴微电子技术有限公司 Method of implementing continuous reception in enhanced multimedia broadcast multicast service and terminal utilizing same
US20190069226A1 (en) * 2017-08-24 2019-02-28 Qualcomm Incorporated Techniques and apparatuses for mobile network searching in multiple radio access technologies

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113613294A (en) * 2021-07-28 2021-11-05 西安广和通无线软件有限公司 Network access method, device, terminal equipment and storage medium
CN113556800A (en) * 2021-09-23 2021-10-26 芯翼信息科技(上海)有限公司 Method, apparatus, medium, and device for searching network
CN113556800B (en) * 2021-09-23 2022-01-07 芯翼信息科技(上海)有限公司 Method, apparatus, medium, and device for searching network
CN114173361A (en) * 2021-12-13 2022-03-11 展讯通信（上海）有限公司 5G network searching method, device and terminal
CN114928865A (en) * 2022-05-12 2022-08-19 拉扎斯网络科技（上海）有限公司 Network switching method and device of cabinet taking router
CN114928865B (en) * 2022-05-12 2024-05-10 拉扎斯网络科技（上海）有限公司 Network switching method and device for meal taking cabinet router

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