CN111294787B - User Equipment (UE) positioning method and device - Google Patents

User Equipment (UE) positioning method and device Download PDF

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Publication number
CN111294787B
CN111294787B CN201811504865.6A CN201811504865A CN111294787B CN 111294787 B CN111294787 B CN 111294787B CN 201811504865 A CN201811504865 A CN 201811504865A CN 111294787 B CN111294787 B CN 111294787B
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ssb
cell
base station
cells
virtual
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CN111294787A (en
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雷超琴
李数林
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/183—Processing at user equipment or user record carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure

Abstract

Disclosed herein are a method and apparatus for locating User Equipment (UE), including: the base station receives a random access preamble message sent by the UE on a Physical Random Access Channel (PRACH) resource; wherein the PRACH resource corresponds to a synchronization signal/physical broadcast channel block (SSB) of a cell to which the UE belongs; and the base station acquires the home cell of the UE in the virtual cell according to the PRACH resource of the random access preamble message sent by the UE, the corresponding relation between the PRACH resource and the SSB and the corresponding relation between the SSB and the cell in the virtual cell. According to the embodiment of the invention, the acquisition of the UE home cell in the virtual cell is realized, so that when the base station needs to schedule the UE to transmit and receive uplink and downlink data, the targeted transmission and reception of the message are realized, and the waste of resources is avoided.

Description

User Equipment (UE) positioning method and device
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method and a device for positioning User Equipment (UE).
Background
The cell virtualization technology is a technology for changing the traditional cell design concept, combining a plurality of access sites with small coverage areas into a virtual cell in control and taking the plurality of access sites as resources of the virtual cell for scheduling.
However, the virtual cell exists in a form of one cell from the outside, so when the UE belonging to a certain cell in the virtual cells sends information to the base station, the base station can only know the virtual cell in which the UE is located, but cannot know the cell actually attributed to the UE in the virtual cells, and therefore when the base station needs to schedule the UE to send and receive uplink and downlink data, the base station can only send and receive data of the UE to all cells in the virtual cells, thereby wasting resources.
Disclosure of Invention
In order to solve the technical problems, the embodiments of the present invention provide a UE positioning method and apparatus, which can determine an actual home cell of a UE in a virtual cell, so as to avoid resource waste caused by non-targeted messaging.
In order to achieve the purpose of the embodiment of the present invention, the embodiment of the present invention provides a UE positioning method, including:
a base station receives a random access preamble message sent by the UE on a physical random access channel (Physical Random Access Channel, PRACH) resource; wherein the PRACH resource corresponds to a synchronization signal/physical broadcast channel block (Synchronous signal/Physical Broadcast Channelblock, SSB) of the UE home cell;
and the base station acquires the home cell of the UE in the virtual cell according to the PRACH resource of the random access preamble message sent by the UE, the corresponding relation between the PRACH resource and the SSB and the corresponding relation between the SSB and the cell in the virtual cell.
The embodiment of the invention also provides a UE positioning method, which comprises the following steps:
the UE detects SSB information;
the UE acquires PRACH resources of a self-attributing cell according to the detected SSB information;
and the UE sends a random access preamble message to a base station on the PRACH resource of the self-attributive cell.
The embodiment of the invention also provides a UE positioning device, which comprises: a first memory and a first processor, wherein the first memory has stored therein the following instructions executable by the first processor:
receiving a random access preamble message sent by UE on PRACH resources; wherein, the PRACH resource corresponds to SSB of the cell to which the UE belongs;
and acquiring the home cell of the UE in the virtual cell according to the PRACH resource of the random access preamble message sent by the UE, the corresponding relation between the PRACH resource and the SSB and the corresponding relation between the SSB and the cell in the virtual cell.
The embodiment of the invention also provides a UE positioning device, which comprises: a second memory and a second processor, wherein the second memory has stored therein the following instructions executable by the second processor:
detecting SSB information;
acquiring PRACH resources of the cell to which the UE belongs according to the detected SSB information;
and the sending module is used for sending the random access preamble message to the base station on the PRACH resource of the cell to which the UE belongs.
The base station acquires the attribution cell of the UE in the virtual cell according to the PRACH resource of the random access preamble message sent by the UE, so that the acquisition of the attribution cell of the UE in the virtual cell is realized, and when the base station needs to schedule the UE to transmit and receive uplink and downlink data, the targeted transmission and reception of the message are realized, and the waste of resources is avoided.
Additional features and advantages of embodiments of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of embodiments of the invention. The objectives and other advantages of embodiments of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the technical aspects of embodiments of the invention, and are incorporated in and constitute a part of this specification, illustrate and not limit the technical aspects of embodiments of the invention.
Fig. 1 is a flow chart of a UE positioning method according to an embodiment of the present invention;
fig. 2 is a flow chart of another UE positioning method according to an embodiment of the present invention;
fig. 3 is a flowchart of another UE positioning method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a UE according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
The steps illustrated in the flowchart of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, while a logical order is depicted in the flowchart, in some cases, the steps depicted or described may be performed in a different order than presented herein.
The embodiment of the invention provides a UE positioning method, as shown in figure 1, which comprises the following steps:
step 101, the base station receives a random access preamble message sent by the UE on the PRACH resource.
Wherein the PRACH resource corresponds to SSB of the cell to which the UE belongs.
It should be noted that the primary synchronization signal (Primary Synchronization Signal, PSS), the secondary synchronization signal (Secondary Synchronization Signal), SSS and the physical broadcast channel (Physical Broadcast Channel, PBCH) together form one SSB (i.e., SS/PBCH block). In the third generation partnership project (3rd Generation Partnership Projec,3Gpp) protocol of the fifth generation mobile communication network (the 5th Generation mobile communication technology,5G), one cell support configuration transmits multiple SSBs, and each SSB may configure a corresponding PRACH resource.
It should be noted that, since the PRACH resource corresponds to the SSB of the cell to which the UE belongs, the base station receives the random access Preamble message sent by the UE on the PRACH resource, that is, the random access Preamble message is sent by the UE on the PRACH resource corresponding to the SSB of the cell to which the UE belongs.
Optionally, before the base station receives the random access preamble message sent by the UE on the PRACH resource, the method further includes:
the base station configures SSBs for all cells in the virtual cell.
The base station configures PRACH resources corresponding to the SSB for all cells in the virtual cells.
Optionally, the base station configures PRACH resources corresponding to SSB for all cells in the virtual cell, including:
the base station configures PRACH resources corresponding to the SSB for all cells in the virtual cell, wherein at least one of the time domain, the frequency domain and the code domain is different.
Step 102, the base station obtains the home cell of the UE in the virtual cell according to the PRACH resource of the random access preamble message sent by the UE, the corresponding relation between the PRACH resource and the SSB and the corresponding relation between the SSB and the cell in the virtual cell.
In one illustrative example, step 102 includes:
and the base station acquires SSB corresponding to the PRACH resource of the random access preamble message sent by the UE in the corresponding relation between the PRACH resource and the SSB.
And the base station acquires a cell corresponding to the acquired SSB from the corresponding relation between the SSB and the cells in the virtual cell as a home cell of the UE in the virtual cell.
In an exemplary embodiment, when the number of cells is greater than the number of configurable SSBs, the base station configures SSBs for all cells in the virtual cell, including:
and the base station configures SSB for all cells in the virtual cells by adopting a mode of multiplexing SSB.
Specifically, when the interference isolation between two or more cells in the virtual cell satisfies a certain condition, the cells may be configured with the same SSB. The interference isolation meeting a certain condition may specifically mean that the distance is greater than a preset distance, and the preset distance may be a distance where signal interference caused by the interference isolation itself to the counterpart is lower than a preset interference value.
According to the UE positioning method provided by the embodiment of the invention, the base station acquires the attribution cell of the UE in the virtual cell according to the PRACH resource of the random access preamble message sent by the UE, so that the acquisition of the attribution cell of the UE in the virtual cell is realized, and when the base station needs to schedule the UE to transmit and receive uplink and downlink data, the targeted transmission and reception of the message are realized, and the waste of resources is avoided.
The embodiment of the invention provides a UE positioning method, as shown in fig. 2, which comprises the following steps:
step 201, the UE detects SSB information.
Step 202, the UE acquires PRACH resources of the self-home cell according to the detected SSB information.
Step 203, the UE sends a random access preamble message to the base station on the PRACH resource of its own home cell.
According to the UE positioning method provided by the embodiment of the invention, the UE sends the random access preamble message to the base station on the PRACH resource of the self-attributing cell, so that the base station acquires the attributing cell of the UE in the virtual cell according to the PRACH resource of the random access preamble message sent by the UE, the acquisition of the UE attributing cell in the virtual cell is realized, and when the base station needs to schedule the UE to transmit and receive uplink and downlink data, the targeted transmission and reception of the message are realized, and the waste of resources is avoided.
The embodiment of the invention also provides a UE positioning method, which comprises the following steps:
step 1, configuring different SSBs for N transmission points belonging to one virtual cell, and configuring PRACH resources corresponding to each SSB, wherein in a 5G protocol, the number of configurable SSBs supported by different frequency bands is different, and the maximum number of configurable SSBs can be supported and configured, where N is the number of transmission points contained in one virtual cell, and if the value of N is greater than the number of configurable SSBs, the SSBs can be multiplexed, and a specific multiplexing method may be: as long as the interference isolation between the transmitting points meets a certain condition, the two transmitting points can configure the same SSB, wherein the PRACH resource configuration requires different time domains, frequency domains or code domains corresponding to the PRACH resources corresponding to different SSBs.
Step 2, the UE detects the SSB and sends an access Preamble message on PRACH resources corresponding to the detected SSB.
And 3, the base station determines the SSB corresponding to the UE according to the Preamble resource sent by the UE, so as to determine a sending point corresponding to the SSB, wherein the sending point is the sending point to which the UE belongs.
The embodiment of the invention also provides a UE positioning method, as shown in figure 3, comprising the following steps:
step 301, the base station configures different SSBs for 2 transmission points in a virtual cell, and assumes that transmission point 1 configures SSB1, transmission point 2 configures SSB2, and configures PRACH resources corresponding to each SSB, and assumes that SSB1 corresponds to 0-31 of a Preamble sequence, and SSB2 corresponds to 32-63 of the Preamble sequence.
Step 302, the UE detects the SSB2, and knows that the PRACH resource corresponding to the SSB2 is 32-63 of the Preamble sequence, and the UE adopts any one sequence of the 32-63 of the Preamble sequence to send the access Preamble message.
Step 303, the base station determines that SSB corresponding to the UE is SSB2 and the transmission point corresponding to SSB2 is transmission point 2 according to the Preamble sequence sent by the UE belonging to 32-63, thereby determining that transmission point 2 is the transmission point to which the UE belongs.
The embodiment of the invention also provides a base station, as shown in fig. 4, including:
a receiving module 41, configured to receive a random access preamble message sent by a UE on a PRACH resource; wherein the PRACH resource corresponds to SSB of the cell to which the UE belongs.
The first processing module 42 is configured to obtain a home cell of the UE in the virtual cell according to a PRACH resource of the UE sending the random access preamble message, a correspondence between the PRACH resource and the SSB, and a correspondence between the SSB and the cell in the virtual cell.
Optionally, the first processing module 42 is further configured to:
SSBs are configured for all cells in the virtual cell.
And configuring PRACH resources corresponding to the SSB for all cells in the virtual cells.
Optionally, the first processing module 42 is specifically configured to configure PRACH resources corresponding to SSB for all cells in the virtual cell, where at least one of time domain, frequency domain and code domain is different.
Optionally, the first processing module 42 is specifically configured to:
and acquiring SSB corresponding to the PRACH resource of the random access preamble message sent by the UE in the corresponding relation between the PRACH resource and the SSB.
And acquiring a cell corresponding to the acquired SSB from the corresponding relation between the SSB and the cells in the virtual cell as a home cell of the UE in the virtual cell.
Optionally, when the number of cells is greater than the number of configurable SSBs, the first processing module 42 is specifically configured to configure SSBs for all cells in the virtual cell by multiplexing SSBs.
According to the base station provided by the embodiment of the invention, the home cell of the UE in the virtual cell is obtained according to the PRACH resource of the random access preamble message sent by the UE, so that the acquisition of the home cell of the UE in the virtual cell is realized, and when the base station needs to schedule the UE to transmit and receive uplink and downlink data, the targeted transmission and reception of the message are realized, and the waste of resources is avoided.
In practical applications, the receiving module 41 and the first processing module 42 are implemented by a central processing unit (Central Processing Unit, CPU), a microprocessor (Micro Processor Unit, MPU), a digital signal processor (Digital Signal Processor, DSP), or a field programmable gate array (Field Programmable Gate Array, FPGA) in the base station.
The embodiment of the invention also provides a UE, as shown in fig. 5, including:
and a second processing module 51, configured to detect SSB information.
The second processing module 51 is further configured to obtain PRACH resources of the UE home cell according to the detected SSB information.
A sending module 52, configured to send a random access preamble message to the base station on PRACH resources of the UE home cell.
The embodiment of the invention provides the UE, and the random access preamble message is sent to the base station on the PRACH resource of the self-attributing cell, so that the base station acquires the attributing cell of the UE in the virtual cell according to the PRACH resource of the PRACH message sent by the UE, thereby realizing the acquisition of the attributing cell of the UE in the virtual cell, and realizing the targeted receiving and sending of the message and avoiding the waste of resources when the base station needs to schedule the UE to send and receive uplink and downlink data.
In practical application, the second processing module 51 and the sending module 52 are located in CPU, MPU, DSP or FPGA in the UE.
The embodiment of the invention also provides a UE positioning device, which comprises: a first memory and a first processor, wherein the first memory has stored therein the following instructions executable by the first processor:
receiving a random access preamble message sent by UE on PRACH resources; wherein the PRACH resource corresponds to SSB of the cell to which the UE belongs.
And acquiring the home cell of the UE in the virtual cell according to the PRACH resource of the random access preamble message sent by the UE, the corresponding relation between the PRACH resource and the SSB and the corresponding relation between the SSB and the cell in the virtual cell.
Optionally, the first memory further has stored therein instructions executable by the first processor to:
SSBs are configured for all cells in the virtual cell.
And configuring PRACH resources corresponding to the SSB for all cells in the virtual cells.
Optionally, the first memory has stored therein the following instructions executable by the first processor:
and configuring PRACH resources which correspond to the SSB and are different in at least one of time domain, frequency domain and code domain for all cells in the virtual cells.
Optionally, the first memory has stored therein the following instructions executable by the first processor:
and acquiring SSB corresponding to the PRACH resource of the random access preamble message sent by the UE in the corresponding relation between the PRACH resource and the SSB.
And acquiring a cell corresponding to the acquired SSB from the corresponding relation between the SSB and the cells in the virtual cell as a home cell of the UE in the virtual cell.
Optionally, when the number of cells is greater than the number of configurable SSBs, the first memory has stored therein the following instructions executable by the first processor:
and the base station configures SSB for all cells in the virtual cells by adopting a mode of multiplexing SSB.
The embodiment of the invention also provides a UE positioning device, which comprises: a second memory and a second processor, wherein the second memory has stored therein the following instructions executable by the second processor:
and detecting information of the SSB.
And acquiring PRACH resources of the cell to which the UE belongs according to the detected SSB information.
And sending the random access preamble message to the base station on PRACH resources of the cell to which the UE belongs.
The embodiment of the invention also provides a computer readable storage medium, wherein the storage medium is stored with computer executable instructions for executing the following steps:
receiving a random access preamble message sent by UE on PRACH resources; wherein the PRACH resource corresponds to SSB of the cell to which the UE belongs.
And acquiring the home cell of the UE in the virtual cell according to the PRACH resource of the random access preamble message sent by the UE, the corresponding relation between the PRACH resource and the SSB and the corresponding relation between the SSB and the cell in the virtual cell.
Optionally, the computer-executable instructions further perform the steps of:
SSBs are configured for all cells in the virtual cell.
And configuring PRACH resources corresponding to the SSB for all cells in the virtual cells.
Optionally, the computer-executable instructions specifically perform the steps of:
and configuring PRACH resources which correspond to the SSB and are different in at least one of time domain, frequency domain and code domain for all cells in the virtual cells.
Optionally, the computer-executable instructions specifically perform the steps of:
and acquiring SSB corresponding to the PRACH resource of the random access preamble message sent by the UE in the corresponding relation between the PRACH resource and the SSB.
And acquiring a cell corresponding to the acquired SSB from the corresponding relation between the SSB and the cells in the virtual cell as a home cell of the UE in the virtual cell.
Optionally, when the number of cells is greater than the number of configurable SSBs, the computer-executable instructions specifically perform the steps of:
and the base station configures SSB for all cells in the virtual cells by adopting a mode of multiplexing SSB.
The embodiment of the invention also provides a computer readable storage medium, wherein the storage medium is stored with computer executable instructions for executing the following steps:
and detecting information of the SSB.
And acquiring PRACH resources of the cell to which the UE belongs according to the detected SSB information.
And sending the random access preamble message to the base station on PRACH resources of the cell to which the UE belongs.
Although the embodiments of the present invention are described above, the embodiments are merely used for facilitating understanding of the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the embodiments of the invention, but the scope of the embodiments of the invention is defined by the appended claims.

Claims (9)

1. A user equipment, UE, positioning method comprising:
the base station receives a random access preamble message sent by the UE on a physical random access channel PRACH resource; wherein, the PRACH resource corresponds to a synchronous signal/physical broadcast channel block SSB of the cell to which the UE belongs;
the base station acquires a home cell of the UE in a virtual cell according to PRACH resources, corresponding relation between PRACH resources and SSB and corresponding relation between SSB and the cell in the virtual cell, wherein the PRACH resources of the random access preamble message are sent by the UE;
the obtaining the home cell of the UE in the virtual cell comprises the following steps:
the base station acquires SSB corresponding to the PRACH resource of the random access preamble message sent by the UE in the corresponding relation between the PRACH resource and the SSB;
and the base station acquires a cell corresponding to the acquired SSB from the corresponding relation between the SSB and the cells in the virtual cell, and takes the cell as a home cell of the UE in the virtual cell.
2. The UE positioning method according to claim 1, wherein before the base station receives the random access preamble message sent by the UE on the PRACH resource, the base station further comprises:
the base station configures SSB for all cells in the virtual cell, and establishes a corresponding relation between the SSB and the cells in the virtual cell;
the base station configures PRACH resources corresponding to the SSB for all cells in the virtual cells, and establishes a corresponding relation between the PRACH resources and the SSB.
3. The UE positioning method according to claim 2, wherein the base station configures PRACH resources corresponding to SSB for all cells in the virtual cell, comprising:
the base station configures PRACH resources which correspond to the SSB and are different in at least one of time domain, frequency domain and code domain for all cells in the virtual cell.
4. The UE positioning method according to claim 2, wherein when the number of cells is greater than the number of configurable SSBs, the base station configures SSBs for all cells in the virtual cell, comprising:
and the base station configures SSB for all cells in the virtual cells by adopting a mode of multiplexing SSB.
5. A UE positioning method, comprising:
the UE detects SSB information;
the UE acquires PRACH resources of a self-attributing cell according to the detected SSB information;
the UE sends a random access preamble message to a base station on PRACH resources of the self-attributing cell, so that the base station obtains the attributing cell of the UE in the virtual cell according to the PRACH resources, the corresponding relation between the PRACH resources and SSB and the corresponding relation between the SSB and the cell in the virtual cell, which are sent by the UE;
the obtaining the home cell of the UE in the virtual cell comprises the following steps:
the base station acquires SSB corresponding to the PRACH resource of the random access preamble message sent by the UE in the corresponding relation between the PRACH resource and the SSB;
and the base station acquires a cell corresponding to the acquired SSB from the corresponding relation between the SSB and the cells in the virtual cell, and takes the cell as a home cell of the UE in the virtual cell.
6. A UE positioning device, comprising: a first memory and a first processor, wherein the first memory has stored therein the following instructions executable by the first processor:
receiving a random access preamble message sent by UE on PRACH resources; wherein, the PRACH resource corresponds to SSB of the cell to which the UE belongs;
acquiring a home cell of the UE in a virtual cell according to PRACH resources of the random access preamble message sent by the UE, the corresponding relation between the PRACH resources and SSB and the corresponding relation between the SSB and the cell in the virtual cell;
the first memory has stored therein, in particular, the following instructions executable by the first processor:
acquiring SSB corresponding to PRACH resources of the random access preamble message sent by the UE in the corresponding relation between the PRACH resources and the SSB;
and acquiring a cell corresponding to the acquired SSB from the corresponding relation between the SSB and the cells in the virtual cell as a home cell of the UE in the virtual cell.
7. The UE positioning device of claim 6, wherein the first memory further has stored therein instructions executable by the first processor to:
configuring SSB for all cells in the virtual cell;
and configuring PRACH resources corresponding to the SSB for all cells in the virtual cells.
8. The UE positioning device of claim 6, wherein the first memory has stored therein the following instructions executable by the first processor:
and configuring PRACH resources which correspond to the SSB and are different in at least one of time domain, frequency domain and code domain for all cells in the virtual cell.
9. A UE positioning device, comprising: a second memory and a second processor, wherein the second memory has stored therein the following instructions executable by the second processor:
detecting SSB information;
acquiring PRACH resources of the cell to which the UE belongs according to the detected SSB information;
transmitting a random access preamble message to a base station on PRACH resources of a cell to which the UE belongs, so that the base station acquires the cell to which the UE belongs in a virtual cell according to the PRACH resources, the corresponding relation between the PRACH resources and SSB and the corresponding relation between the SSB and the cell in the virtual cell, wherein the PRACH resources of the random access preamble message are transmitted by the UE;
the obtaining the home cell of the UE in the virtual cell comprises the following steps:
the base station acquires SSB corresponding to the PRACH resource of the random access preamble message sent by the UE in the corresponding relation between the PRACH resource and the SSB;
and the base station acquires a cell corresponding to the acquired SSB from the corresponding relation between the SSB and the cells in the virtual cell, and takes the cell as a home cell of the UE in the virtual cell.
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