CN107404737B - Method, device and system for reselecting MTC terminal cell - Google Patents
Method, device and system for reselecting MTC terminal cell Download PDFInfo
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- CN107404737B CN107404737B CN201610331199.5A CN201610331199A CN107404737B CN 107404737 B CN107404737 B CN 107404737B CN 201610331199 A CN201610331199 A CN 201610331199A CN 107404737 B CN107404737 B CN 107404737B
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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
- H04W36/04—Reselecting a cell layer in multi-layered cells
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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
Abstract
The invention provides a cell reselection method, a cell reselection device and a cell reselection system for an MTC (machine type communication) terminal. The method comprises the following steps: when the MTC terminal resides in an enhanced coverage cell, the network side equipment judges whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around the current cell, and sets a same-frequency neighbor cell indication bit and a different-frequency neighbor cell indication bit in a master information block MIB according to the judgment result, wherein the same-frequency neighbor cell indication bit and the different-frequency neighbor cell indication bit respectively indicate whether the same-frequency cell or the different-frequency cell which normally covers and supports MTC communication exists around the current cell, so that the MTC terminal can reselect the cell according to the same-frequency neighbor cell indication bit and the different-frequency neighbor cell indication bit in the MIB. The invention can avoid the problem that the MTC terminal does not reselect the cell because the MTC terminal does not read the system information related to the cell reselection under the condition of not increasing the power consumption of the MTC terminal.
Description
Technical Field
The invention relates to the technical field of MTC (machine type communication), in particular to a method, a device and a system for reselecting an MTC terminal cell.
Background
With the rapid development of the internet of things, MTC (Machine-Type Communication) is naturally getting more and more attentive as an important component of the internet of things, and 3GPP (3rd Generation partnership project) is dedicated to research on using LTE (Long Term Evolution) network to carry MTC Communication.
MTC communication refers to a communication manner between machines (device to device) without human involvement, and is also called M2M (Machine-to-Machine) communication.
In order to deal with MTC communication, 3GPP has optimized LTE protocol itself to different degrees, and unlike LTE System Information including MIB (Master Information Block) and multiple SIBs (System Information blocks), 3GPP rel.13 standard introduces new System Information MTC-SIB1, MTC-SIB2, MTC-SIB3, MTC-SIB4, MTC-SIB5, MTC-SIB14 to replace SIBs, that is, System Information related to MTC communication includes: MIB and MTC-SIB1, MTC-SIB2, MTC-SIB3, MTC-SIB4, MTC-SIB5 and MTC-SIB14, wherein the MIB comprises a limited number of the most important and most common transmission parameters, the information amount is small, and the MIB is easy to be successfully read by MTC terminals, and the MTC-SIB3, the MTC-SIB4 and the MTC-SIB5 are system information related to cell reselection.
The MTC terminal resides in a proper cell, and after staying for a proper time (1 second), a cell reselection process can be carried out. Through cell reselection, the MTC terminal in the idle mode can be ensured to reside in a proper cell to the maximum extent.
According to the existing protocol, if the MTC terminal resides in a cell which enhances coverage and supports MTC communication, when there is a cell which supports MTC communication and has normal coverage around the cell, the MTC terminal should reselect to the cell. When the MTC terminal reselects a cell, because the system information MTC-SIB3, MTC-SIB4, and MTC-SIB5 related to cell reselection need to be repeatedly received for multiple times in the enhanced coverage cell to be successful, the MTC terminal may not read the system information in consideration of power consumption, and thus, the MTC terminal may select to continuously camp on the current enhanced coverage cell.
In the process of implementing the invention, the inventor finds that at least the following technical problems exist in the prior art:
if the MTC terminal residing in the cell with enhanced coverage does not read the system information related to cell reselection due to power consumption, the MTC terminal will not reselect to a cell supporting MTC communication even if the cell with normal coverage is newly created around the MTC terminal.
Disclosure of Invention
The cell reselection method, the device and the system of the MTC terminal can avoid the problem that the MTC terminal does not reselect the cell because the MTC terminal does not read the system information related to the cell reselection under the condition that the power consumption of the MTC terminal is not increased.
In a first aspect, the present invention provides an MTC terminal cell reselection method, where the method is applied to a network side device, and the method includes:
when the MTC terminal resides in an enhanced coverage cell, judging whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around the current cell;
setting a same-frequency adjacent cell indication bit and a different-frequency adjacent cell indication bit in a master information block MIB according to a judgment result, wherein the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit respectively indicate whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around a current cell, so that the MTC terminal can reselect the cell according to the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit in the MIB.
Optionally, the setting the indication bits of the neighboring cells with the same frequency and the neighboring cells with different frequency in the master information block MIB according to the determination result includes:
if the same-frequency cell which normally covers and supports MTC communication exists around the current cell, indicating the position 1 of the same-frequency adjacent cell in the MIB, and otherwise, setting 0; and if the pilot frequency cell which normally covers and supports MTC communication exists around the current cell, indicating the position 1 of the pilot frequency adjacent cell in the MIB, and otherwise, setting 0.
In a second aspect, the present invention provides a cell reselection method for an MTC terminal, where the method is applied to an MTC terminal, and the method includes:
when the MTC terminal resides in an enhanced coverage cell, reading system information of the current cell;
when system information related to cell reselection is not read, judging whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around the current cell according to a same-frequency adjacent cell indication bit and a different-frequency adjacent cell indication bit in a master information block MIB;
and searching a common-frequency cell or a pilot-frequency cell which normally covers the periphery of the current cell and supports MTC communication according to the judgment result, and reselecting the cell.
Optionally, the determining, according to the indication bits of the same-frequency neighboring cells and the indication bits of the different-frequency neighboring cells in the master information block MIB, whether there is a same-frequency cell or a different-frequency cell that normally covers and supports MTC communication around the current cell includes:
if the indication bit of the same-frequency adjacent cell in the MIB is 1, judging that the same-frequency cell which normally covers and supports MTC communication exists around the current cell; if the indication bit of the same-frequency adjacent cell in the MIB is 0, judging that no normal coverage exists around the current cell and the same-frequency cell supporting MTC communication exists; if the pilot bit of the pilot frequency adjacent cell in the MIB is 1, judging that a pilot frequency cell which normally covers and supports MTC communication exists around the current cell; and if the pilot bit of the pilot frequency adjacent cell in the MIB is 0, judging that no pilot frequency cell which normally covers and supports MTC communication exists around the current cell.
Optionally, the searching for a co-frequency cell or a inter-frequency cell that normally covers around the current cell and supports MTC communication according to the determination result, and performing cell reselection includes:
if the same-frequency cell which normally covers and supports MTC communication exists around the current cell, other cells are continuously searched on the frequency point to which the current cell belongs; if a pilot frequency cell which normally covers and supports MTC communication exists around the current cell, other cells are continuously searched on a frequency point different from the frequency point to which the current cell belongs; if the same-frequency cell and the different-frequency cell which normally cover and support MTC communication exist around the current cell, searching the same-frequency adjacent cell first and then searching the different-frequency adjacent cell; if the surrounding of the current cell does not have the same-frequency cell which normally covers and supports MTC communication, or the different-frequency cell which normally covers and supports MTC communication, the search is not carried out;
and performing cell reselection according to the search result.
In a third aspect, the present invention provides an MTC terminal cell reselection apparatus, where the apparatus is located in a network side device, and the apparatus includes:
the first judging unit is used for judging whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around a current cell when the MTC terminal resides in an enhanced coverage cell;
the first setting unit is used for setting a same-frequency neighbor cell indication bit in a master information block MIB according to a judgment result made by the first judging unit, wherein the same-frequency neighbor cell indication bit indicates whether a normal coverage exists around a current cell and supports MTC communication;
and the second setting unit is used for setting the pilot bit of the pilot frequency adjacent cell in the master information block MIB according to the judgment result made by the first judging unit, wherein the pilot bit of the pilot frequency adjacent cell indicates whether the pilot frequency cell which normally covers and supports MTC communication exists around the current cell.
Optionally, the first setting unit is configured to indicate a position 1 to a co-frequency neighboring cell in the MIB when the first determining unit determines that a co-frequency cell that normally covers and supports MTC communication exists around the current cell, and otherwise set 0 to the position;
the second setting unit is configured to indicate a location 1 to a pilot frequency neighboring cell in the MIB when the first determining unit determines that a pilot frequency cell that normally covers and supports MTC communications exists around the current cell, and set 0 to the neighboring cell if not.
In a fourth aspect, the present invention provides an MTC terminal cell reselection device, where the device is located at an MTC terminal, and the device includes:
a reading unit, configured to read system information of a current cell when the MTC terminal resides in an enhanced coverage cell;
a second judging unit, configured to, when the reading unit does not read system information related to cell reselection, judge whether a same-frequency cell or a different-frequency cell that normally covers and supports MTC communication exists around a current cell according to a same-frequency neighboring cell indicator bit and a different-frequency neighboring cell indicator bit in a master information block MIB;
and the reselection unit is used for searching a common-frequency cell or a pilot-frequency cell which normally covers the periphery of the current cell and supports MTC communication according to the judgment result of the second judgment unit, and performing cell reselection.
Optionally, the second determining unit is configured to determine that there is a normal coverage and an intra-frequency cell supporting MTC communication around the current cell when the intra-frequency neighboring cell indicator in the MIB is 1; when the indication bit of the same-frequency adjacent cell in the MIB is 0, judging that no normal coverage exists around the current cell and the same-frequency cell supporting MTC communication exists; when the pilot bit of the pilot frequency adjacent cell in the MIB is 1, judging that a pilot frequency cell which normally covers and supports MTC communication exists around the current cell; and when the pilot bit of the pilot frequency adjacent cell in the MIB is 0, judging that no pilot frequency cell which normally covers and supports MTC communication exists around the current cell.
Optionally, the reselection unit includes:
the searching subunit is configured to, when the second determining unit determines that a co-frequency cell that normally covers and supports MTC communication exists around the current cell, continue to search for other cells at a frequency point to which the current cell belongs; when the second judging unit judges that a pilot frequency cell which normally covers and supports MTC communication exists around the current cell, other cells are continuously searched on a frequency point different from the frequency point to which the current cell belongs; when the second judgment unit judges that a common-frequency cell and a pilot-frequency cell which normally cover and support MTC communication exist around the current cell at the same time, searching the common-frequency neighboring cell first and then searching the pilot-frequency neighboring cell; when the second judging unit judges that the surrounding of the current cell does not have the same-frequency cell which normally covers and supports MTC communication, or the different-frequency cell which normally covers and supports MTC communication, searching is not carried out;
and the reselection subunit is used for reselecting the cell according to the search result of the search subunit.
In a fifth aspect, the present invention provides a network side device, where the network side device includes the MTC terminal cell reselection apparatus located in the network side device.
In a sixth aspect, the present invention provides an MTC terminal, where the MTC terminal includes the cell reselection device located in the MTC terminal.
In a seventh aspect, the present invention provides an MTC terminal cell reselection system, where the system includes a network side device and an MTC terminal;
the network side equipment is used for judging whether a normal coverage common-frequency cell or a different-frequency cell supporting MTC communication exists around a current cell when the MTC terminal resides in an enhanced coverage cell; setting a same-frequency adjacent cell indication bit and a different-frequency adjacent cell indication bit in a master information block MIB according to a judgment result, wherein the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit respectively indicate whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around a current cell, so that the MTC terminal can reselect the cell according to the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit in the MIB;
the MTC terminal is used for reading the system information of the current cell when the MTC terminal resides in the enhanced coverage cell; when system information related to cell reselection is not read, judging whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around the current cell according to a same-frequency adjacent cell indication bit and a different-frequency adjacent cell indication bit in a master information block MIB; and searching a common-frequency cell or a pilot-frequency cell which normally covers the periphery of the current cell and supports MTC communication according to the judgment result, and reselecting the cell.
According to the method, the device and the system for reselecting the MTC terminal cell, two indicating bits, namely the same-frequency adjacent cell indicating bit and the different-frequency adjacent cell indicating bit, are added in the master information block MIB, the MTC terminal residing in the enhanced coverage cell is informed in time through the two indicating bits, whether the same-frequency cell or the different-frequency cell which normally covers and supports MTC communication exists around the MTC terminal or not is avoided, compared with the prior art, the problem that the MTC terminal does not reselect the cell because the MTC terminal does not read system information related to cell reselection under the condition of not increasing power consumption is solved, and meanwhile, unnecessary searching is avoided.
Drawings
Fig. 1 is a flowchart illustrating an MTC terminal cell reselection method applied to a network side device according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an application of a cell reselection method for an MTC terminal to an MTC terminal according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an MTC terminal cell reselection apparatus located in a network side device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an MTC terminal cell reselection device located at an MTC terminal according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a reselection unit included in a cell reselection device of an MTC terminal located in an MTC terminal according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a cell reselection system of an MTC terminal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides an MTC terminal cell reselection method, which is applied to a network side device, as shown in fig. 1, and the method includes the following steps:
s11, when the MTC terminal resides in the enhanced coverage cell, judging whether a normal coverage cell or a pilot frequency cell supporting MTC communication exists around the current cell;
s12, setting a same-frequency adjacent cell indication bit and a different-frequency adjacent cell indication bit in a master information block MIB according to the judgment result, wherein the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit respectively indicate whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around the current cell, so that the MTC terminal can reselect the cell according to the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit in the MIB.
Specifically, when S11 is executed, the neighboring cells of the current cell may be located in the same base station or may be located in different base stations, and the related information may be obtained through an OAM or X2 interface.
Specifically, when S12 is executed, the network side device may set the intra-frequency neighbor indication bit and the inter-frequency neighbor indication bit in the master information block MIB in the following manner, including:
if the same-frequency cell which normally covers and supports MTC communication exists around the current cell, indicating the position 1 of the same-frequency adjacent cell in the MIB, and otherwise, setting 0; and if the pilot frequency cell which normally covers and supports MTC communication exists around the current cell, indicating the position 1 of the pilot frequency adjacent cell in the MIB, and otherwise, setting 0.
Of course, the setting of the indication bits of the adjacent regions with the same frequency and the adjacent regions with different frequencies is not limited to the above-mentioned manner, and other manners may also be adopted, for example: if the same-frequency cell which normally covers and supports MTC communication exists around the current cell, indicating the position 0 of the same-frequency adjacent cell in the MIB, and otherwise, setting the position 1; and if the pilot frequency cell which normally covers and supports MTC communication exists around the current cell, indicating the position 0 of the pilot frequency adjacent cell in the MIB, and otherwise, setting the position 1. The setting rule of the indication bit of the same-frequency adjacent region and the indication bit of the different-frequency adjacent region can be defined in advance between the network side equipment and the MTC terminal.
An embodiment of the present invention provides a cell reselection method for an MTC terminal, where the method is applied to an MTC terminal, and as shown in fig. 2, the method includes the following steps:
s21, when the MTC terminal resides in the enhanced coverage cell, reading the system information of the current cell;
when the neighboring cell around the MTC terminal changes, the MTC terminal may know the distribution state of the neighboring cell through the MIB and then determine whether reselection is required, and if reselection is required, S21 is executed.
S22, when system information related to cell reselection is not read, judging whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around the current cell according to the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit in the master information block MIB;
when the MTC terminal resides in the enhanced coverage cell, the MTC terminal may choose not to read the system information related to cell reselection but only read the system information related to service establishment because reading the system information is difficult and consumes power.
And S23, searching the co-frequency cell or the inter-frequency cell which normally covers around the current cell and supports MTC communication according to the judgment result, and reselecting the cell.
Optionally, the determining, according to the indication bits of the same-frequency neighboring cells and the indication bits of the different-frequency neighboring cells in the master information block MIB, whether there is a same-frequency cell or a different-frequency cell that normally covers and supports MTC communication around the current cell includes:
if the indication bit of the same-frequency adjacent cell in the MIB is 1, judging that the same-frequency cell which normally covers and supports MTC communication exists around the current cell; if the indication bit of the same-frequency adjacent cell in the MIB is 0, judging that no normal coverage exists around the current cell and the same-frequency cell supporting MTC communication exists; if the pilot bit of the pilot frequency adjacent cell in the MIB is 1, judging that a pilot frequency cell which normally covers and supports MTC communication exists around the current cell; and if the pilot bit of the pilot frequency adjacent cell in the MIB is 0, judging that no pilot frequency cell which normally covers and supports MTC communication exists around the current cell.
Optionally, the searching for a co-frequency cell or a inter-frequency cell that normally covers around the current cell and supports MTC communication according to the determination result, and performing cell reselection includes:
if the same-frequency cell which normally covers and supports MTC communication exists around the current cell, other cells are continuously searched on the frequency point to which the current cell belongs; if a pilot frequency cell which normally covers and supports MTC communication exists around the current cell, other cells are continuously searched on a frequency point different from the frequency point to which the current cell belongs; if the same-frequency cell and the different-frequency cell which normally cover and support MTC communication exist around the current cell, searching the same-frequency adjacent cell first and then searching the different-frequency adjacent cell; if the surrounding of the current cell does not have the same-frequency cell which normally covers and supports MTC communication, or the different-frequency cell which normally covers and supports MTC communication, the search is not carried out;
and performing cell reselection according to the search result.
Specifically, if there is an intra-frequency cell and/or inter-frequency cell that normally covers and supports MTC communication around the current cell, the MTC terminal performs cell reselection in the searched intra-frequency cell and/or inter-frequency cell according to the existing protocol. And if the surrounding of the current cell does not have the same-frequency cell which normally covers and supports MTC communication, or the different-frequency cell which normally covers and supports MTC communication, the MTC terminal continues to reside in the current cell and does not reselect.
The MTC terminal cell reselection method provided by the embodiment of the invention comprises the steps of being applied to network side equipment and being applied to an MTC terminal, and informing the MTC terminal residing in an enhanced coverage cell in time through two indicating bits, namely a same-frequency neighbor cell indicating bit and a different-frequency neighbor cell indicating bit, by adding the two indicating bits in a master information block MIB, whether a normal coverage exists around the MTC terminal and whether the MTC terminal or the same-frequency cell supporting MTC communication exists or not.
An embodiment of the present invention further provides an MTC terminal cell reselection apparatus, where the apparatus is located in a network side device, as shown in fig. 3, the apparatus includes:
a first determining unit 31, configured to determine whether a same-frequency cell or a different-frequency cell that normally covers and supports MTC communication exists around a current cell when the MTC terminal resides in an enhanced coverage cell;
a first setting unit 32, configured to set a same-frequency neighboring cell indication bit in a master information block MIB according to a determination result made by the first determining unit 31, where the same-frequency neighboring cell indication bit indicates whether a normal coverage exists around a current cell and supports MTC communication;
a second setting unit 33, configured to set a pilot bit of a pilot frequency neighboring cell in the master information block MIB according to the determination result made by the first determining unit 31, where the pilot bit of the pilot frequency neighboring cell indicates whether a pilot frequency cell that normally covers and supports MTC communication exists around the current cell.
Optionally, the first setting unit 32 is configured to indicate a position 1 to a co-frequency neighboring cell in the MIB when the first determining unit 31 determines that a co-frequency cell that supports MTC communication and normally covers exists around the current cell, and otherwise set 0 to the co-frequency neighboring cell;
the second setting unit 33 is configured to indicate a location 1 to the pilot frequency neighboring cell in the MIB when the first determining unit 31 determines that the pilot frequency cell that supports MTC communications and normally covers exists around the current cell, and otherwise set 0 to the location.
An embodiment of the present invention further provides a device for reselecting a cell of an MTC terminal, where the device is located at an MTC terminal, and as shown in fig. 4, the device includes:
a reading unit 41, configured to read system information of a current cell when the MTC terminal resides in an enhanced coverage cell;
a second determining unit 42, configured to determine whether a common-frequency cell or a different-frequency cell that normally covers and supports MTC communication exists around a current cell according to a common-frequency neighboring cell indicator bit and a different-frequency neighboring cell indicator bit in a master information block MIB when the reading unit 41 does not read system information related to cell reselection;
a reselecting unit 43, configured to search, according to the determination result of the second determining unit 42, a co-frequency cell or a inter-frequency cell that normally covers around the current cell and supports MTC communication, and perform cell reselection.
Optionally, the second determining unit 42 is configured to determine that there is a normal coverage area around the current cell and a co-frequency cell supporting MTC communication when the co-frequency neighboring cell indicator in the MIB is 1; when the indication bit of the same-frequency adjacent cell in the MIB is 0, judging that no normal coverage exists around the current cell and the same-frequency cell supporting MTC communication exists; when the pilot bit of the pilot frequency adjacent cell in the MIB is 1, judging that a pilot frequency cell which normally covers and supports MTC communication exists around the current cell; and when the pilot bit of the pilot frequency adjacent cell in the MIB is 0, judging that no pilot frequency cell which normally covers and supports MTC communication exists around the current cell.
Optionally, as shown in fig. 5, the reselection unit 43 includes:
a searching subunit 51, configured to, when the second determining unit 42 determines that there is a co-frequency cell that normally covers around the current cell and supports MTC communication, continue to search for other cells at a frequency point to which the current cell belongs; when the second determining unit 42 determines that a pilot frequency cell which normally covers and supports MTC communication exists around the current cell, it continues to search for other cells at a frequency point different from the frequency point to which the current cell belongs; when the second determination unit 42 determines that a common-frequency cell and a pilot-frequency cell which normally cover and support MTC communication simultaneously exist around the current cell, the common-frequency neighboring cell is searched first, and then the pilot-frequency neighboring cell is searched; when the second determining unit 42 determines that there is neither a common-frequency cell that normally covers and supports MTC communication around the current cell, nor a pilot-frequency cell that normally covers and supports MTC communication, no search is performed;
a reselecting subunit 52, configured to perform cell reselection according to the search result of the searching subunit 51.
The MTC terminal cell reselection device provided by the embodiment of the invention comprises a device at a network side and an MTC terminal, wherein two indicating bits, namely a same-frequency adjacent cell indicating bit and a different-frequency adjacent cell indicating bit, are added in a master information block MIB, and the MTC terminal residing in an enhanced coverage cell is informed in time through the two indicating bits, whether a normal coverage exists around the MTC terminal and whether a same-frequency cell or a different-frequency cell supporting MTC communication exists around the MTC terminal.
The embodiment of the invention provides network side equipment, which comprises the MTC terminal cell reselection device positioned in the network side equipment.
The embodiment of the invention provides an MTC terminal, which comprises the MTC terminal cell reselection device positioned in the MTC terminal.
An embodiment of the present invention further provides an MTC terminal cell reselection system, as shown in fig. 6, where the system includes a network side device 61 and an MTC terminal 62;
the network side device 61 is configured to, when the MTC terminal 62 resides in an enhanced coverage cell, determine whether a same-frequency cell or a different-frequency cell that normally covers and supports MTC communication exists around a current cell; setting a same-frequency adjacent cell indication bit and a different-frequency adjacent cell indication bit in a master information block MIB according to a judgment result, wherein the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit respectively indicate whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around a current cell, so that the MTC terminal 62 can reselect the cell according to the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit in the MIB;
the MTC terminal 62 is configured to read system information of a current cell when the MTC terminal 62 resides in an enhanced coverage cell; when system information related to cell reselection is not read, judging whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around the current cell according to a same-frequency adjacent cell indication bit and a different-frequency adjacent cell indication bit in a master information block MIB; and searching a common-frequency cell or a pilot-frequency cell which normally covers the periphery of the current cell and supports MTC communication according to the judgment result, and reselecting the cell.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (13)
1. An MTC terminal cell reselection method is applied to network side equipment, and is characterized in that the method comprises the following steps:
when the MTC terminal resides in an enhanced coverage cell, judging whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around the current cell;
setting a same-frequency adjacent cell indication bit and a different-frequency adjacent cell indication bit in a master information block MIB according to a judgment result, wherein the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit respectively indicate whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around a current cell, so that the MTC terminal can reselect the cell according to the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit in the MIB.
2. The method according to claim 1, wherein the setting the indication bits of the neighboring cells with the same frequency and the indication bits of the neighboring cells with different frequencies in the master information block MIB according to the determination result comprises:
if the same-frequency cell which normally covers and supports MTC communication exists around the current cell, indicating the position 1 of the same-frequency adjacent cell in the MIB, and otherwise, setting 0; and if the pilot frequency cell which normally covers and supports MTC communication exists around the current cell, indicating the position 1 of the pilot frequency adjacent cell in the MIB, and otherwise, setting 0.
3. An MTC terminal cell reselection method is applied to an MTC terminal, and the method comprises the following steps:
when the MTC terminal resides in an enhanced coverage cell, reading system information of the current cell;
when system information MTC-SIB3, MTC-SIB4 and MTC-SIB5 related to cell reselection is not read, whether a common-frequency cell or a pilot-frequency cell which normally covers and supports MTC communication exists around the current cell is judged according to a common-frequency neighbor indication bit and a pilot-frequency neighbor indication bit in a master information block MIB;
and searching a common-frequency cell or a pilot-frequency cell which normally covers the periphery of the current cell and supports MTC communication according to the judgment result, and reselecting the cell.
4. The method according to claim 3, wherein the determining whether there is a normal coverage common-frequency cell or an inter-frequency cell supporting MTC communication around a current cell according to the common-frequency neighbor indication bits and the inter-frequency neighbor indication bits in the master information block MIB comprises:
if the indication bit of the same-frequency adjacent cell in the MIB is 1, judging that the same-frequency cell which normally covers and supports MTC communication exists around the current cell; if the indication bit of the same-frequency adjacent cell in the MIB is 0, judging that no normal coverage exists around the current cell and the same-frequency cell supporting MTC communication exists; if the pilot bit of the pilot frequency adjacent cell in the MIB is 1, judging that a pilot frequency cell which normally covers and supports MTC communication exists around the current cell; and if the pilot bit of the pilot frequency adjacent cell in the MIB is 0, judging that no pilot frequency cell which normally covers and supports MTC communication exists around the current cell.
5. The method according to claim 3 or 4, wherein the searching for the intra-frequency cell or the inter-frequency cell that normally covers around the current cell and supports MTC communication according to the determination result, and the cell reselection comprises:
if the same-frequency cell which normally covers and supports MTC communication exists around the current cell, other cells are continuously searched on the frequency point to which the current cell belongs; if a pilot frequency cell which normally covers and supports MTC communication exists around the current cell, other cells are continuously searched on a frequency point different from the frequency point to which the current cell belongs; if the same-frequency cell and the different-frequency cell which normally cover and support MTC communication exist around the current cell, searching the same-frequency adjacent cell first and then searching the different-frequency adjacent cell; if the surrounding of the current cell does not have the same-frequency cell which normally covers and supports MTC communication, or the different-frequency cell which normally covers and supports MTC communication, the search is not carried out;
and performing cell reselection according to the search result.
6. An MTC terminal cell reselection apparatus, wherein the apparatus is located at a network side device, the apparatus comprising:
the first judging unit is used for judging whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around a current cell when the MTC terminal resides in an enhanced coverage cell;
the first setting unit is used for setting a same-frequency neighbor cell indication bit in a master information block MIB according to a judgment result made by the first judging unit, wherein the same-frequency neighbor cell indication bit indicates whether a normal coverage exists around a current cell and supports MTC communication;
and the second setting unit is used for setting the pilot bit of the pilot frequency adjacent cell in the master information block MIB according to the judgment result made by the first judging unit, wherein the pilot bit of the pilot frequency adjacent cell indicates whether the pilot frequency cell which normally covers and supports MTC communication exists around the current cell.
7. The apparatus according to claim 6, wherein the first setting unit is configured to indicate a location 1 to a co-frequency neighboring cell in an MIB when the first determining unit determines that a co-frequency cell that supports MTC communication and normally covers exists around a current cell, and otherwise set 0 to the neighboring cell;
the second setting unit is configured to indicate a location 1 to a pilot frequency neighboring cell in the MIB when the first determining unit determines that a pilot frequency cell that normally covers and supports MTC communications exists around the current cell, and set 0 to the neighboring cell if not.
8. An MTC terminal cell reselection device, wherein the device is located at an MTC terminal, the device comprising:
a reading unit, configured to read system information of a current cell when the MTC terminal resides in an enhanced coverage cell;
a second judging unit, configured to, when the reading unit does not read system information MTC-SIB3, MTC-SIB4, and MTC-SIB5 related to cell reselection, judge whether there is an intra-frequency cell or an inter-frequency cell that normally covers and supports MTC communication around the current cell according to an intra-frequency neighboring indication bit and an inter-frequency neighboring indication bit in a master information block MIB;
and the reselection unit is used for searching a common-frequency cell or a pilot-frequency cell which normally covers the periphery of the current cell and supports MTC communication according to the judgment result of the second judgment unit, and performing cell reselection.
9. The apparatus according to claim 8, wherein the second determining unit is configured to determine that there is a normal coverage and an intra-frequency cell supporting MTC communication around a current cell when an intra-frequency neighboring cell indicator in the MIB is 1; when the indication bit of the same-frequency adjacent cell in the MIB is 0, judging that no normal coverage exists around the current cell and the same-frequency cell supporting MTC communication exists; when the pilot bit of the pilot frequency adjacent cell in the MIB is 1, judging that a pilot frequency cell which normally covers and supports MTC communication exists around the current cell; and when the pilot bit of the pilot frequency adjacent cell in the MIB is 0, judging that no pilot frequency cell which normally covers and supports MTC communication exists around the current cell.
10. The apparatus according to claim 8 or 9, wherein the reselection unit comprises:
the searching subunit is configured to, when the second determining unit determines that a co-frequency cell that normally covers and supports MTC communication exists around the current cell, continue to search for other cells at a frequency point to which the current cell belongs; when the second judging unit judges that a pilot frequency cell which normally covers and supports MTC communication exists around the current cell, other cells are continuously searched on a frequency point different from the frequency point to which the current cell belongs; when the second judgment unit judges that a common-frequency cell and a pilot-frequency cell which normally cover and support MTC communication exist around the current cell at the same time, searching the common-frequency neighboring cell first and then searching the pilot-frequency neighboring cell; when the second judging unit judges that the surrounding of the current cell does not have the same-frequency cell which normally covers and supports MTC communication, or the different-frequency cell which normally covers and supports MTC communication, searching is not carried out;
and the reselection subunit is used for reselecting the cell according to the search result of the search subunit.
11. A network side device, characterized in that the network side device comprises the MTC terminal cell reselection apparatus according to claim 6 or 7.
12. An MTC terminal, characterized in that the MTC terminal comprises the MTC terminal cell reselection device according to any one of claims 8 to 10.
13. An MTC terminal cell reselection system is characterized in that the system comprises network side equipment and an MTC terminal;
the network side equipment is used for judging whether a normal coverage common-frequency cell or a different-frequency cell supporting MTC communication exists around a current cell when the MTC terminal resides in an enhanced coverage cell; setting a same-frequency adjacent cell indication bit and a different-frequency adjacent cell indication bit in a master information block MIB according to a judgment result, wherein the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit respectively indicate whether a same-frequency cell or a different-frequency cell which normally covers and supports MTC communication exists around a current cell, so that the MTC terminal can reselect the cell according to the same-frequency adjacent cell indication bit and the different-frequency adjacent cell indication bit in the MIB;
the MTC terminal is used for reading the system information of the current cell when the MTC terminal resides in the enhanced coverage cell; when system information MTC-SIB3, MTC-SIB4 and MTC-SIB5 related to cell reselection is not read, whether a common-frequency cell or a pilot-frequency cell which normally covers and supports MTC communication exists around the current cell is judged according to a common-frequency neighbor indication bit and a pilot-frequency neighbor indication bit in a master information block MIB; and searching a common-frequency cell or a pilot-frequency cell which normally covers the periphery of the current cell and supports MTC communication according to the judgment result, and reselecting the cell.
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| CN110602751A (en) * | 2018-06-13 | 2019-12-20 | 中国电信股份有限公司 | Cell reselection method and device, and user terminal |
| CN110740488B (en) * | 2018-07-20 | 2020-10-16 | 维沃移动通信有限公司 | Method for cell selection, user equipment and network side equipment |
| CN111510265B (en) * | 2019-01-31 | 2022-01-14 | 华为技术有限公司 | Message sending and receiving method and device |
| WO2021249068A1 (en) * | 2020-06-11 | 2021-12-16 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and system for detecting a target cell with 5g cell support in 5g nsa mode |
| CN117880901A (en) * | 2022-10-10 | 2024-04-12 | 华为技术有限公司 | Communication method and device |
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| EP2734001A1 (en) * | 2012-11-02 | 2014-05-21 | General Dynamics Broadband Inc | Method and apparatus for communicating in an increased coverage area to a wireless communication unit |
| CN104684035A (en) * | 2013-11-28 | 2015-06-03 | 中国电信股份有限公司 | Cell reelecting method, terminal and system |
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| EP2734001A1 (en) * | 2012-11-02 | 2014-05-21 | General Dynamics Broadband Inc | Method and apparatus for communicating in an increased coverage area to a wireless communication unit |
| CN104684035A (en) * | 2013-11-28 | 2015-06-03 | 中国电信股份有限公司 | Cell reelecting method, terminal and system |
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