CN110602751A - Cell reselection method and device, and user terminal - Google Patents
Cell reselection method and device, and user terminal Download PDFInfo
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- CN110602751A CN110602751A CN201810605619.3A CN201810605619A CN110602751A CN 110602751 A CN110602751 A CN 110602751A CN 201810605619 A CN201810605619 A CN 201810605619A CN 110602751 A CN110602751 A CN 110602751A
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- cell
- candidate
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- reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0094—Definition of hand-off measurement parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/165—Performing reselection for specific purposes for reducing network power consumption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The disclosure provides a cell reselection method and device and a user terminal. The cell reselection device detects the signal intensity of the current cell, acquires the signal intensity of the adjacent cells under the condition that the signal intensity of the current cell is smaller than the reselection threshold, selects the adjacent cell with the optimal signal intensity as a candidate cell from the adjacent cells with the signal intensity larger than the candidate threshold, detects the cell type of the candidate cell, and switches from the current cell to the candidate cell under the condition that the cell type of the candidate cell is a specified type. The method and the device can avoid the condition that the terminal is off-line and re-searched, effectively reduce the reselection time delay of the terminal, and also effectively reduce the power consumption of the terminal.
Description
Technical Field
The present disclosure relates to the field of communications, and in particular, to a cell reselection method and apparatus, and a user terminal.
Background
The eMTC (Enhanced Machine Type Communication) technology is evolved based on an LTE (Long Term Evolution) protocol. The eMTC and LTE share most resources such as broadcast channels, synchronization signals, reference signals, and the like. Because the eMTC is more suitable for the communication between objects, the eMTC is widely applied to the field of the Internet of things.
Disclosure of Invention
The inventor finds that the eMTC terminal can acquire the neighboring cell information and measure the neighboring cell information after the current cell signal is reduced to the reselection threshold so as to reselect the cell with better signal. In the existing network environment, a large number of LTE cells which do not support eMTC may exist around the eMTC cell, and the eMTC cell is not distinguished from the LTE cell by the neighbor cell information acquired by the eMTC terminal, so that the eMTC terminal is susceptible to interference from the LTE cell which does not support eMTC when reselecting. For example, after initiating a reselection procedure, the eMTC terminal finds that the selected cell is an LTE cell that does not support eMTC, and in this case, stops the reselection procedure, and accesses the peripheral eMTC cell by re-sweeping after the network is disconnected. This significantly increases reselection latency and power consumption of the eMTC terminal.
To this end, the present disclosure provides a cell reselection scheme that avoids the problem of off-network re-search.
In accordance with an aspect of one or more embodiments of the present disclosure, there is provided a cell reselection method including: detecting the signal intensity of the current cell; under the condition that the signal intensity of the current cell is smaller than a reselection threshold, acquiring the signal intensity of an adjacent cell; selecting a neighbor cell with the optimal signal strength as a candidate cell from neighbor cells with the signal strength greater than a candidate threshold; detecting the cell type of the candidate cell; and switching to the candidate cell from the current cell under the condition that the cell type of the candidate cell is the specified type.
In some embodiments, in the event that the cell type of the candidate cell is not a specified type, relinquishing the candidate cell to continue camping on the current cell; then the step of acquiring the signal strength of the neighbor cell is performed.
In some embodiments, in the absence of a neighbor cell having a signal strength greater than a candidate threshold, continuing to camp on the current cell; then the step of acquiring the signal strength of the neighbor cell is performed.
In some embodiments, the specified type is enhanced machine-type communication, eMTC.
In some embodiments, detecting the cell type of the candidate cell comprises: and detecting the cell type of the candidate cell by using the information of the main system information block MIB of the candidate cell.
In accordance with another aspect of one or more embodiments of the present disclosure, there is provided a cell reselection apparatus including: a signal detection module configured to detect a current cell signal strength; the information acquisition module is configured to acquire the signal strength of the adjacent cell under the condition that the signal strength of the current cell is smaller than the reselection threshold; a candidate cell selection module configured to select a neighbor cell with the best signal strength as a candidate cell from neighbor cells with signal strength greater than a candidate threshold; a cell type detection module configured to detect a cell type of a candidate cell; and the reselection control module is configured to switch from the current cell to the candidate cell under the condition that the cell type of the candidate cell is a specified type.
In some embodiments, the reselection control module is further configured to drop the candidate cell to continue camping on the current cell if the cell type of the candidate cell is not the specified type, and then instruct the information acquisition module to perform an operation of acquiring the signal strength of the neighbor cell.
In some embodiments, the reselection control module is further configured to continue camping in the current cell in the absence of a neighbor cell having a signal strength greater than the candidate threshold, and then instruct the information acquisition module to perform an operation of acquiring the signal strength of the neighbor cell.
In some embodiments, the specified type is enhanced machine-type communication, eMTC.
In some embodiments, the cell type detection module is configured to detect the cell type of the candidate cell using primary system information block, MIB, information of the candidate cell.
In accordance with another aspect of one or more embodiments of the present disclosure, there is provided a cell reselection apparatus including: a memory configured to store instructions; a processor coupled to the memory, the processor configured to perform a method according to any of the embodiments described above based on instructions stored in the memory.
According to another aspect of one or more embodiments of the present disclosure, there is provided a user equipment including the cell reselection apparatus according to any of the embodiments described above.
According to another aspect of one or more embodiments of the present disclosure, there is provided a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, which when executed by a processor, implement a method as described above in relation to any one of the embodiments.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is an exemplary flow chart of a cell reselection method according to an embodiment of the present disclosure;
fig. 2 is an exemplary flow chart of a cell reselection method according to another embodiment of the present disclosure;
fig. 3 is an exemplary block diagram of a cell reselection apparatus according to one embodiment of the present disclosure;
fig. 4 is an exemplary block diagram of a cell reselection apparatus according to another embodiment of the present disclosure;
fig. 5 is an exemplary block diagram of a user terminal according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is an exemplary flowchart of a cell reselection method according to an embodiment of the present disclosure. In some embodiments, the method steps of the present embodiment may be performed by a cell reselection device.
In step 101, the signal strength of the current cell is detected.
In some embodiments, the RSRP (Reference Signal Receiving Power) of the current cell may be detected.
In step 102, under the condition that the signal strength of the current cell is smaller than the reselection threshold, the signal strength of the neighboring cell is collected.
In some embodiments, the neighbor Information is acquired by using SIB (System Information Block). For example, the neighbor cell information is obtained by using SIB4 and SIB 5. The RSRP of the neighbor cell is obtained by measuring the dedicated reference signals of the neighbor cell.
In step 103, of the neighboring cells with signal strength greater than the candidate threshold, the neighboring cell with the best signal strength is selected as the candidate cell.
That is, the neighboring cell with the strongest signal is used as the candidate cell.
In step 104, the cell type of the candidate cell is detected.
In some embodiments, the cell type of the candidate cell is detected using MIB (Master Information Block) Information of the candidate cell.
In step 105, in case the cell type of the candidate cell is a specified type, handover is made from the current cell to the candidate cell.
In some embodiments, the specified type is eMTC.
In the cell reselection method provided in the foregoing embodiment of the present disclosure, before initiating a reselection procedure, the cell type of the candidate cell is detected, and only when the candidate cell is of a designated type, the corresponding reselection procedure is executed. Therefore, the condition that the terminal is off-line and re-searched can be avoided, the reselection time delay of the terminal is effectively reduced, and the power consumption of the terminal can be effectively reduced.
Fig. 2 is an exemplary flowchart of a cell reselection method according to another embodiment of the disclosure. In some embodiments, the method steps of the present embodiment may be performed by a cell reselection device.
In step 201, the signal strength of the current cell is detected.
In some embodiments, the RSRP (Reference Signal Receiving Power) of the current cell may be detected.
In step 202, the signal strength of the neighboring cell is collected under the condition that the signal strength of the current cell is smaller than the reselection threshold.
In some embodiments, the neighbor Information is acquired by using SIB (System Information Block). For example, the neighbor cell information is obtained by using SIB4 and SIB 5. The RSRP of the neighbor cell is obtained by measuring the dedicated reference signals of the neighbor cell.
In step 203, it is determined whether there is a neighbor cell with a signal strength greater than the candidate threshold.
If there is a neighboring cell with a signal strength greater than the candidate threshold, go to step 204; if there is no neighboring cell with a signal strength greater than the candidate threshold, step 202 is performed.
If no adjacent cell with the signal strength larger than the candidate threshold exists, the signal quality of the current adjacent cell is poor. In this case, the terminal may continue to camp on the current cell and may detect whether there is a suitable neighbor cell through a loop process.
In step 204, of the neighbor cells with signal strength greater than the candidate threshold, the neighbor cell with the best signal strength is selected as the candidate cell.
In step 205, the cell type of the candidate cell is detected.
In some embodiments, the cell type of the candidate cell is detected using MIB information of the candidate cell.
In step 206, it is determined whether the cell type of the candidate cell is a specified type.
If the cell type of the candidate cell is the designated type, execute step 207; if the cell type of the candidate cell is not the specified type, step 208 is performed.
In step 207, handover is made from the current cell to the candidate cell.
In step 208, the candidate cell is dropped to continue camping on the current cell. Step 202 is then performed.
For example, if the candidate cell is an LTE cell and is not the specified eMTC cell, the terminal abandons the candidate cell and continues to camp on the current cell. While through a round-robin process to select the appropriate eMTC cell.
Fig. 3 is an exemplary block diagram of a cell reselection apparatus according to an embodiment of the present disclosure. As shown in fig. 3, the cell reselection apparatus includes a signal detection module 31, an information collection module 32, a candidate cell selection module 33, a cell type detection module 34, and a reselection control module 35.
The signal detection module 31 is configured to detect the current cell signal strength.
In some embodiments, the RSRP of the current cell may be detected.
The information acquisition module 32 is configured to acquire the signal strength of the neighbor cell if the current cell signal strength is less than the reselection threshold.
The candidate cell selection module 33 is configured to select a neighbor cell having the best signal strength as the candidate cell among neighbor cells having signal strengths greater than the candidate threshold.
The cell type detection module 34 is configured to detect the cell type of the candidate cell.
In some embodiments, the cell type of the candidate cell is detected using MIB information of the candidate cell.
The reselection control module 35 is configured to switch from the current cell to the candidate cell if the cell type of the candidate cell is a specified type.
In some embodiments, the specified type is eMTC.
In the cell reselection device provided in the foregoing embodiment of the present disclosure, before initiating a reselection procedure, the cell type of the candidate cell is detected, and only when the candidate cell is of a specified type, the corresponding reselection procedure is executed. Therefore, the condition that the terminal is off-line and re-searched can be avoided, the reselection time delay of the terminal is effectively reduced, and the power consumption of the terminal can be effectively reduced.
In some embodiments, the reselection control module 35 is further configured to drop the candidate cell to continue camping on the current cell if the cell type of the candidate cell is not the specified type, and then instruct the information acquisition module 32 to perform an operation of acquiring the signal strength of the neighbor cell.
For example, if the candidate cell is an LTE cell and is not the specified eMTC cell, the terminal abandons the candidate cell and continues to camp on the current cell. While through a round-robin process to select the appropriate eMTC cell.
In some embodiments, the reselection control module 35 is further configured to continue camping on the current cell in the absence of a neighboring cell having a signal strength greater than the candidate threshold, and then instruct the information acquisition module 32 to perform an operation of acquiring the signal strength of the neighboring cell.
If no adjacent cell with the signal strength larger than the candidate threshold exists, the signal quality of the current adjacent cell is poor. In this case, the terminal may continue to camp on the current cell and may detect whether there is a suitable neighbor cell through a loop process.
Fig. 4 is an exemplary block diagram of a cell reselection apparatus according to another embodiment of the present disclosure. As shown in fig. 4, the application identification management means includes a memory 41 and a processor 42.
The memory 41 is used for storing instructions, the processor 42 is coupled to the memory 41, and the processor 42 is configured to execute the method according to any one of the embodiments in fig. 1 or fig. 2 based on the instructions stored in the memory.
As shown in fig. 4, the cell reselection apparatus further includes a communication interface 43 for information interaction with other devices. Meanwhile, the device also comprises a bus 44, and the processor 42, the communication interface 43 and the memory 41 are communicated with each other through the bus 44.
The memory 41 may comprise a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 41 may also be a memory array. The storage 41 may also be partitioned, and the blocks may be combined into virtual volumes according to certain rules.
Further, the processor 42 may be a central processing unit CPU, or may be an application specific integrated circuit ASIC, or one or more integrated circuits configured to implement embodiments of the present disclosure.
The present disclosure also relates to a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the instructions, when executed by a processor, implement a method according to any one of the embodiments shown in fig. 1 or fig. 2.
Fig. 5 is an exemplary block diagram of a user terminal according to an embodiment of the present disclosure. As shown in fig. 5, the user terminal 51 is provided with a cell reselection device 52. The cell reselection device 52 is the cell reselection device according to any one of the embodiments shown in fig. 3 or fig. 4.
In some embodiments, the user terminal 51 is an eMTC terminal.
In some embodiments, the functional unit modules described above may be implemented as a general purpose Processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable Logic device, discrete gate or transistor Logic, discrete hardware components, or any suitable combination thereof for performing the functions described in this disclosure.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The description of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (13)
1. A method of cell reselection, comprising:
detecting the signal intensity of the current cell;
under the condition that the signal intensity of the current cell is smaller than a reselection threshold, acquiring the signal intensity of an adjacent cell;
selecting a neighbor cell with the optimal signal strength as a candidate cell from neighbor cells with the signal strength greater than a candidate threshold;
detecting the cell type of the candidate cell;
and switching to the candidate cell from the current cell under the condition that the cell type of the candidate cell is a specified type.
2. The method of claim 1, further comprising:
in the case that the cell type of the candidate cell is not a specified type, abandoning the candidate cell to continue to reside in the current cell;
then the step of acquiring the signal strength of the neighbor cell is performed.
3. The method of claim 1, further comprising:
continuing to camp in the current cell in the absence of a neighbor cell having a signal strength greater than a candidate threshold;
then the step of acquiring the signal strength of the neighbor cell is performed.
4. The method of claim 1, wherein,
the specified type is enhanced machine type communication (eMTC).
5. The method of any of claims 1-4, detecting the cell type of the candidate cell comprising:
and detecting the cell type of the candidate cell by using the information of the main system information block MIB of the candidate cell.
6. A cell reselection apparatus comprising:
a signal detection module configured to detect a current cell signal strength;
the information acquisition module is configured to acquire the signal strength of the adjacent cell under the condition that the signal strength of the current cell is smaller than the reselection threshold;
a candidate cell selection module configured to select a neighbor cell with the best signal strength as a candidate cell from neighbor cells with signal strength greater than a candidate threshold;
a cell type detection module configured to detect a cell type of the candidate cell;
a reselection control module configured to switch from the current cell to the candidate cell if the cell type of the candidate cell is a specified type.
7. The apparatus of claim 6, wherein,
the reselection control module is further configured to abandon the candidate cell to continue to reside in the current cell and then instruct the information acquisition module to perform an operation of acquiring the signal strength of a neighbor cell, in a case where the cell type of the candidate cell is not a specified type.
8. The apparatus of claim 6, wherein,
the reselection control module is further configured to continue to camp in the current cell in the absence of a neighboring cell having a signal strength greater than the candidate threshold, and then instruct the information acquisition module to perform an operation of acquiring the signal strength of the neighboring cell.
9. The apparatus of claim 6, wherein,
the specified type is enhanced machine type communication (eMTC).
10. The apparatus of any one of claims 6-9,
the cell type detection module is configured to detect the cell type of the candidate cell using the primary system information block, MIB, information of the candidate cell.
11. A cell reselection apparatus comprising:
a memory configured to store instructions;
a processor coupled to the memory, the processor configured to perform implementing the method of any of claims 1-5 based on instructions stored by the memory.
12. A user terminal comprising the cell reselection apparatus of any of claims 6-11.
13. A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 1-5.
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Application publication date: 20191220 |