CN111866961B - Method and device for reselecting standby cell and computer readable storage medium - Google Patents
Method and device for reselecting standby cell and computer readable storage medium Download PDFInfo
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- CN111866961B CN111866961B CN201910341123.4A CN201910341123A CN111866961B CN 111866961 B CN111866961 B CN 111866961B CN 201910341123 A CN201910341123 A CN 201910341123A CN 111866961 B CN111866961 B CN 111866961B
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000004590 computer program Methods 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 14
- 230000011664 signaling Effects 0.000 claims description 10
- 230000015654 memory Effects 0.000 claims description 7
- 210000004027 cell Anatomy 0.000 description 341
- 210000000678 band cell Anatomy 0.000 description 15
- 101150039363 SIB2 gene Proteins 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the invention provides a standby cell reselection method, a standby cell reselection device and a computer readable storage medium, wherein the method comprises the following steps: receiving indication information, wherein the indication information comprises a standby cell identifier; judging whether the cell needs to be reselected to a standby cell or not; and if the fact that the standby cell needs to be reselected is judged, reselecting the standby cell according to the standby cell identifier.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a method and apparatus for reselecting a standby cell, and a computer readable storage medium.
Background
When the terminal only accesses the unlicensed band (NR in Unlicensed Spectrum, NR-U) cell, if the LBT fails, no information can be sent to the base station, at this time, the LBT may be continuously tried (since the backoff mechanism needs to monitor for a longer period of time, i.e. the probability of success will be smaller under the same channel occupation condition), or the terminal enters the Idle state to reselect to the unlicensed band cell with low channel occupation rate, or to the licensed band cell without LBT.
Currently, for inter-frequency (inter-frequency) and inter-system (inter-RAT) cell reselection, frequency priority setting is supported, i.e. when a certain frequency band is configured as high priority, all terminals within the configured range will reselect preferentially to the cell using that frequency band, and apply the cell reselection criterion with priority. For cell reselection of the same frequency or same frequency priority (operating in different frequency bands but configured with the same frequency priority), the reselection order is determined by cell-ranking.
It can be seen that, for inter-frequency and inter-system cell reselection, the priority is applicable to all terminals, and increasing the priority of a certain cell or the operating frequency thereof will cause all terminals to reselect to the cell preferentially, resulting in load imbalance and congestion; for same frequency cell reselection, cell ordering is equally applicable to all terminals. However, an unlicensed band cell with low channel occupancy or an licensed band cell that does not require LBT cannot independently increase the reselection priority of the cell for certain special needs of the terminal (e.g., LBT has failed, important information needs to be sent).
Disclosure of Invention
At least one embodiment of the present invention provides a method, apparatus, and computer-readable storage medium for reselection of a standby cell, where the method for reselection of a standby cell preferentially reselects to a standby cell (including an unlicensed band cell with a low channel occupancy or an licensed band cell without LBT) based on the standby cell identifier, so as to ensure that an emergency message of a terminal can be sent in time.
According to an aspect of the present invention, at least one embodiment provides a method for reselection of a standby cell, which is applied to a terminal, including:
receiving indication information, wherein the indication information comprises a standby cell identifier;
judging whether the cell needs to be reselected to a standby cell or not;
and if the fact that the standby cell needs to be reselected is judged, reselecting the standby cell according to the standby cell identifier.
Optionally, after the terminal reselects to the standby cell, the method further includes:
and the terminal enters an idle state or a light connection state after the service initiated by the standby cell is completed, and is suitable for the original reselection rule.
Wherein the backup cell identifier is used for indicating whether the own cell is a backup cell.
Optionally, the spare cell identifier is further used to indicate a list of a spare cell or a plurality of spare cells adjacent to the current cell.
Optionally, the backup cell identifier is further configured to indicate parameters for reselection, where the parameters include:
bias factors for inter-frequency and/or inter-system reselection decision conditions; or,
bias factor for common frequency reselection cell ordering.
Wherein the condition for judging that the reselection to the standby cell is needed comprises one or more of the following:
currently, a preset message needs to be sent;
the LBT failure times exceed a preset threshold;
the LBT failure time exceeds a preset threshold.
Wherein the reselecting to the standby cell according to the standby cell identifier comprises:
if the spare cell identification does not indicate the parameter for reselection, reselecting to the spare cell indicated by the spare cell identification, and selecting a spare cell according to the original reselection rule when the spare cell identification is determined to indicate a plurality of spare cells;
and if the standby cell identification indicates the parameters for reselection, selecting a standby cell according to the original reselection rule by adopting the indicated parameters for reselection.
Wherein the entering the idle state or the light connection state includes:
after the service is finished, the device automatically enters an idle state or a light connection state; or,
entering an idle state or a light connection state after receiving the notification of the network node; the notification is sent by the network node when the network node determines that a preset message sent by the terminal is received, and/or determines that transmission of a service flow preset by the terminal is completed, and/or determines that the terminal maintains a connection state for a preset duration in the standby cell.
According to another aspect of the present invention, at least one embodiment also provides a method for standby cell reselection, the method being applied to a network node, comprising:
setting indication information; wherein the indication information comprises a standby cell identifier;
and sending the indication information to judge and reselect to the standby cell by the terminal based on the standby cell identification in the indication information.
Wherein the backup cell identity is further configured to indicate parameters for reselection, the parameters including:
bias factors for inter-frequency and/or inter-system reselection decision conditions; or,
bias factor for common frequency reselection cell ordering.
Wherein the sending the indication information includes:
the indication information is transmitted through broadcasting or dedicated signaling.
Optionally, the method further comprises: when the terminal is determined to meet one or more of the following conditions, notifying the terminal to enter an idle state or a light connection state, and applying the original reselection rule:
determining that a preset message sent by a terminal is received;
determining that the transmission of a service stream preset by a terminal is completed;
and determining that the terminal maintains the connection state for a preset duration in the standby cell.
According to another aspect of the present invention, at least one embodiment also provides a spare cell reselection apparatus, which is applied to a terminal, including:
a receiving module, configured to receive indication information, where the indication information includes a spare cell identifier;
a determining module, configured to determine whether reselection to a standby cell is required;
and the reselection module is used for reselecting the standby cell according to the standby cell identifier when the determination module judges that the standby cell needs to be reselected.
According to another aspect of the present invention, at least one embodiment also provides a standby cell reselection apparatus, which is applied to a network node, comprising:
the setting module is used for setting the indication information; wherein the indication information comprises a standby cell identifier;
and the sending module is used for sending the indication information and is used for judging and reselecting to the standby cell based on the standby cell identification in the indication information by the terminal.
According to another aspect of the present invention, at least one embodiment also provides a spare cell reselection apparatus, including: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to execute the steps of the above method when running the computer program.
According to another aspect of the present invention, at least one embodiment also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the above-described method.
The embodiment of the invention provides a standby cell reselection method, a standby cell reselection device and a computer readable storage medium, wherein a terminal receives indication information, and the indication information comprises a standby cell identifier; judging whether the cell needs to be reselected to a standby cell or not; and if the fact that the standby cell needs to be reselected is judged, reselecting the standby cell according to the standby cell identifier. According to the embodiment of the invention, the terminal served by the unlicensed band cell can reselect to the standby cell (including the unlicensed band cell with low channel occupancy rate or the licensed band cell without LBT) based on the standby cell identification according to the self-needs (the sending needs and/or the LBT conditions), so that the emergency message of the terminal can be sent in time.
Drawings
Fig. 1 is a schematic flow chart of a method for reselecting a standby cell according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a second embodiment of a method for reselecting a standby cell according to the present invention;
fig. 3 is a schematic diagram of a standby cell reselection apparatus according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a second embodiment of a standby cell reselection apparatus according to the present invention;
fig. 5 is a flowchart of a method for reselecting a standby cell according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for reselecting a standby cell according to an embodiment of the present invention;
fig. 7 is a flowchart of a method for reselecting a standby cell according to a second embodiment of the present invention;
fig. 8 is a flowchart of a method for reselecting a standby cell according to a third embodiment of the present invention;
fig. 9 is a flowchart of a method for reselecting a standby cell according to a fourth embodiment of the present invention.
Detailed Description
The invention is described below with reference to the drawings and examples.
The embodiment of the invention provides a standby cell reselection method, as shown in fig. 1, which is applied to a terminal and comprises the following steps:
step 101: receiving indication information, wherein the indication information comprises a standby cell identifier;
step 102: judging whether the cell needs to be reselected to a standby cell or not;
step 103: and if the fact that the standby cell needs to be reselected is judged, reselecting the standby cell according to the standby cell identifier.
Here, the indication information may include at least the spare cell identity. The indication information may be a system message (e.g., SIB2 for NR), or RRC signaling, etc.
According to the embodiment of the invention, the terminal served by the unlicensed band cell can reselect to the standby cell (including the unlicensed band cell with low channel occupancy rate or the licensed band cell without LBT) based on the standby cell identification according to the self-needs (the sending needs and/or the LBT conditions), so that the emergency message of the terminal can be sent in time.
In the embodiment of the present invention, after the terminal reselects to the standby cell, the method further includes:
the terminal enters an idle state or a light connection state after the service initiated by the standby cell is completed, and an original (related technology) reselection rule is applicable. Therefore, after the timely transmission of the emergency message is ensured, the current cell reselection mechanism can be ensured, and the resource waste of the terminal caused by the fact that the terminal continuously executes judgment on whether reselection is needed or not is avoided.
In the embodiment of the invention, the standby cell identifier is used for indicating whether the cell is a standby cell or not.
In one embodiment, the backup cell identity is further used to indicate a list of backup cell or backup cells adjacent to the current cell. Thus, the method and the device can be suitable for the situation that one standby cell or a plurality of standby cells exist in the current cell, and the applicability of the embodiment is improved.
In one embodiment, the spare cell identity is further used to indicate parameters for reselection, the parameters including:
bias factors for inter-frequency and/or inter-system reselection decision conditions; or,
bias factor for common frequency reselection cell ordering.
For example: in one embodiment, the spare cell identity indicates that the own cell is a spare cell and indicates a bias factor for preferred reselection; alternatively, the spare cell identity indicates a list of neighboring spare cells and indicates a bias factor for preferred reselection.
In the embodiment of the present invention, the conditions for determining that reselection to the standby cell is required include one or more of the following:
currently, preset information (for example, IDC indication indicating that self-interference cannot be solved) needs to be sent;
the LBT failure times exceed a preset threshold;
the LBT failure time exceeds a preset threshold.
In an embodiment of the present invention, the reselecting to the standby cell according to the standby cell identifier includes:
if the spare cell identification does not indicate the parameter for reselection, reselecting to the spare cell indicated by the spare cell identification, and selecting a spare cell according to the original reselection rule when the spare cell identification is determined to indicate a plurality of spare cells;
and if the standby cell identification indicates the parameters for reselection, selecting a standby cell according to the original reselection rule by adopting the indicated parameters for reselection.
In the embodiment of the present invention, the entering the idle state or the light connection state includes:
after the service is finished, the device automatically enters an idle state or a light connection state; or,
entering an idle state or a light connection state after receiving the notification of the network node; the notification is sent by the network node when the network node determines that a preset message sent by the terminal is received, and/or determines that transmission of a service flow preset by the terminal is completed, and/or determines that the terminal maintains a connection state for a preset duration in the standby cell.
The embodiment of the invention also provides a standby cell reselection method, as shown in fig. 2, which is applied to a network node and comprises the following steps:
step 201: setting indication information; wherein the indication information comprises a standby cell identifier;
step 202: and sending the indication information to judge and reselect to the standby cell by the terminal based on the standby cell identification in the indication information.
In the embodiment of the invention, the standby cell identifier is used for indicating whether the cell is a standby cell or not.
In one embodiment, the backup cell identity is further used to indicate a list of backup cell or backup cells adjacent to the current cell.
In one embodiment, the spare cell identity is further used to indicate parameters for reselection, including:
bias factors for inter-frequency and/or inter-system reselection decision conditions; or,
bias factor for common frequency reselection cell ordering.
In an embodiment of the present invention, the sending the indication information includes:
the indication information is transmitted through broadcasting or dedicated signaling.
In one embodiment, the method further comprises: when the terminal is determined to meet one or more of the following conditions, notifying the terminal to enter an idle state or a light connection state, and applying the original reselection rule:
determining that a preset message sent by a terminal is received;
determining that the transmission of a service stream preset by a terminal is completed;
and determining that the terminal maintains the connection state for a preset duration in the standby cell.
In order to implement the above method, the embodiment of the present invention further provides a device for reselecting a standby cell, as shown in fig. 3, where the device is applied to a terminal, and includes:
a receiving module 301, configured to receive indication information, where the indication information includes a spare cell identifier;
a determining module 302, configured to determine whether reselection to a standby cell is required;
and the reselection module 303 is configured to reselect to the standby cell according to the standby cell identifier when the determination module determines that reselection to the standby cell is required.
In the embodiment of the present invention, the terminal reselects to the standby cell, and after the service initiated by the standby cell is completed, the reselection module 303 is further configured to make the terminal enter an idle state or a light connection state, and apply the original (related technology described) reselection rule.
In the embodiment of the invention, the standby cell identifier is used for indicating whether the cell is a standby cell or not.
In one embodiment, the backup cell identity is further used to indicate a list of backup cell or backup cells adjacent to the current cell.
In one embodiment, the spare cell identity is further used to indicate parameters for reselection, the parameters including:
bias factors for inter-frequency and/or inter-system reselection decision conditions; or,
bias factor for common frequency reselection cell ordering.
In the embodiment of the present invention, the determining module 302 determines whether the condition of reselecting to the standby cell is needed or not includes one or more of the following:
currently, preset information (for example, IDC indication indicating that self-interference cannot be solved) needs to be sent;
the LBT failure times exceed a preset threshold;
the LBT failure time exceeds a preset threshold.
In the embodiment of the present invention, the reselection module 303 reselects to a spare cell according to the spare cell identifier, including:
if the spare cell identification does not indicate the parameter for reselection, reselecting to the spare cell indicated by the spare cell identification, and selecting a spare cell according to the original reselection rule when the spare cell identification is determined to indicate a plurality of spare cells;
and if the standby cell identification indicates the parameters for reselection, selecting a standby cell according to the original reselection rule by adopting the indicated parameters for reselection.
In the embodiment of the present invention, the reselection module 303 makes the terminal enter an idle state or a light connection state, including:
after the service is finished, enabling the terminal to automatically enter an idle state or a light connection state; or,
after receiving the notification of the network node, enabling the terminal to enter an idle state or a light connection state; the notification is sent by the network node when the network node determines that a preset message sent by the terminal is received, and/or determines that transmission of a service flow preset by the terminal is completed, and/or determines that the terminal maintains a connection state for a preset duration in the standby cell.
The embodiment of the invention also provides a device for reselecting the standby cell, which is applied to the network node and comprises the following steps:
a setting module 401, configured to set indication information; wherein the indication information comprises a standby cell identifier;
and the sending module 402 is configured to send the indication information, and is configured to determine and reselect to a standby cell based on a standby cell identifier in the indication information.
In the embodiment of the invention, the standby cell identifier is used for indicating whether the cell is a standby cell or not.
In one embodiment, the backup cell identity is further used to indicate a list of backup cell or backup cells adjacent to the current cell.
In one embodiment, the spare cell identity is further used to indicate parameters for reselection, including:
bias factors for inter-frequency and/or inter-system reselection decision conditions; or,
bias factor for common frequency reselection cell ordering.
In the embodiment of the present invention, the sending module 402 sends the indication information, including:
the indication information is transmitted through broadcasting or dedicated signaling.
In one embodiment, the sending module 402 is further configured to notify the terminal to enter the idle state or the light connection state when it is determined that the terminal meets one or more of the following conditions, and apply the original reselection rule:
determining that a preset message sent by a terminal is received;
determining that the transmission of a service stream preset by a terminal is completed;
and determining that the terminal maintains the connection state for a preset duration in the standby cell.
The embodiment of the invention also provides a device for reselecting the standby cell, which is applied to the terminal and comprises the following steps: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor, when executing the computer program, performs:
receiving indication information, wherein the indication information comprises a standby cell identifier;
judging whether the cell needs to be reselected to a standby cell or not;
and if the fact that the standby cell needs to be reselected is judged, reselecting the standby cell according to the standby cell identifier.
And after the terminal reselects to the standby cell and the service is completed, the processor is further configured to execute, when executing the computer program:
and enabling the terminal to enter an idle state or a light connection state, and adapting to the original reselection rule.
Wherein the backup cell identifier is used for indicating whether the own cell is a backup cell.
Wherein the backup cell identity is further used to indicate a list of a backup cell or multiple backup cells adjacent to the current cell.
Wherein the backup cell identity is further configured to indicate parameters for reselection, the parameters including:
bias factors for inter-frequency and/or inter-system reselection decision conditions; or,
bias factor for common frequency reselection cell ordering.
The conditions under which the reselection to the standby cell is determined include one or more of:
currently, a preset message needs to be sent;
the LBT failure times exceed a preset threshold;
the LBT failure time exceeds a preset threshold.
The processor is further configured to, when reselecting to a standby cell according to the standby cell identity, execute:
if the spare cell identification does not indicate the parameter for reselection, reselecting to the spare cell indicated by the spare cell identification, and selecting a spare cell according to the original reselection rule when the spare cell identification is determined to indicate a plurality of spare cells;
and if the standby cell identification indicates the parameters for reselection, selecting a standby cell according to the original reselection rule by adopting the indicated parameters for reselection.
The processor is further configured to execute, when the computer program is executed, when the computer program enters an idle state or a light connection state:
after the service is finished, the device automatically enters an idle state or a light connection state; or,
entering an idle state or a light connection state after receiving the notification of the network node; the notification is sent by the network node when the network node determines that a preset message sent by the terminal is received, and/or determines that transmission of a service flow preset by the terminal is completed, and/or determines that the terminal maintains a connection state for a preset duration in the standby cell.
The embodiment of the invention also provides a device for reselecting the standby cell, which is applied to the terminal and comprises the following steps: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor, when executing the computer program, performs:
setting indication information; wherein the indication information comprises a standby cell identifier;
and sending the indication information to judge and reselect to the standby cell by the terminal based on the standby cell identification in the indication information.
Wherein the backup cell identifier is used for indicating whether the own cell is a backup cell.
Wherein the backup cell identity is further used to indicate a list of a backup cell or multiple backup cells adjacent to the current cell.
Wherein the backup cell identity is further configured to indicate parameters for reselection, the parameters including:
bias factors for inter-frequency and/or inter-system reselection decision conditions; or,
bias factor for common frequency reselection cell ordering.
The processor is further configured to, when executing the computer program, perform:
the indication information is transmitted through broadcasting or dedicated signaling.
The processor is further configured to execute, when the computer program is executed:
when the terminal is determined to meet one or more of the following conditions, notifying the terminal to enter an idle state or a light connection state, and applying the original reselection rule:
determining that a preset message sent by a terminal is received;
determining that the transmission of a service stream preset by a terminal is completed;
and determining that the terminal maintains the connection state for a preset duration in the standby cell.
It should be noted that: in the apparatus provided in the above embodiment, when performing the reselection of the standby cell, only the division of each program module is used as an example, in practical application, the process allocation may be performed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the processes described above. In addition, the apparatus provided in the foregoing embodiments and the corresponding method embodiments belong to the same concept, and specific implementation processes of the apparatus and the corresponding method embodiments are detailed in the method embodiments, which are not described herein again.
In an exemplary embodiment, the present invention further provides a computer readable storage medium, which may be FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM; but may be a variety of devices including one or any combination of the above-described memories, such as a mobile phone, computer, tablet device, personal digital assistant, or the like.
The embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs:
receiving indication information, wherein the indication information comprises a standby cell identifier;
judging whether the cell needs to be reselected to a standby cell or not;
and if the fact that the standby cell needs to be reselected is judged, reselecting the standby cell according to the standby cell identifier.
After the terminal reselects to the standby cell and the service is completed, when the computer program is executed by the processor, the method further performs:
and enabling the terminal to enter an idle state or a light connection state, and adapting to the original reselection rule.
Wherein the backup cell identifier is used for indicating whether the own cell is a backup cell.
Wherein the backup cell identity is further used to indicate a list of a backup cell or multiple backup cells adjacent to the current cell.
Wherein the backup cell identity is further configured to indicate parameters for reselection, the parameters including:
bias factors for inter-frequency and/or inter-system reselection decision conditions; or,
bias factor for common frequency reselection cell ordering.
The conditions under which the reselection to the standby cell is determined include one or more of:
currently, a preset message needs to be sent;
the LBT failure times exceed a preset threshold;
the LBT failure time exceeds a preset threshold.
When the standby cell is reselected according to the standby cell identifier, the computer program is executed by the processor and further executes:
if the spare cell identification does not indicate the parameter for reselection, reselecting to the spare cell indicated by the spare cell identification, and selecting a spare cell according to the original reselection rule when the spare cell identification is determined to indicate a plurality of spare cells;
and if the standby cell identification indicates the parameters for reselection, selecting a standby cell according to the original reselection rule by adopting the indicated parameters for reselection.
When the computer program is executed by the processor, the method further performs:
after the service is finished, the device automatically enters an idle state or a light connection state; or,
entering an idle state or a light connection state after receiving the notification of the network node; the notification is sent by the network node when the network node determines that a preset message sent by the terminal is received, and/or determines that transmission of a service flow preset by the terminal is completed, and/or determines that the terminal maintains a connection state for a preset duration in the standby cell.
The embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs:
setting indication information; wherein the indication information comprises a standby cell identifier;
and sending the indication information to judge and reselect to the standby cell by the terminal based on the standby cell identification in the indication information.
Wherein the backup cell identifier is used for indicating whether the own cell is a backup cell.
Wherein the backup cell identity is further used to indicate a list of a backup cell or multiple backup cells adjacent to the current cell.
Wherein the standby cell identity is further configured to indicate parameters for preferred reselection, the parameters including:
bias factors for inter-frequency and/or inter-system reselection decision conditions; or,
bias factor for common frequency reselection cell ordering.
When the instruction information is sent, the computer program is executed by the processor and further executes:
the indication information is transmitted through broadcasting or dedicated signaling.
The computer program, when executed by the processor, further performs:
when the terminal is determined to meet one or more of the following conditions, notifying the terminal to enter an idle state or a light connection state, and applying the original reselection rule:
determining that a preset message sent by a terminal is received;
determining that the transmission of a service stream preset by a terminal is completed;
and determining that the terminal maintains the connection state for a preset duration in the standby cell.
The invention is described below in connection with scene embodiments.
The embodiment proposes a method for reselecting a standby cell, and the flow is shown in fig. 5, and includes:
step 501: the network node (base station) indicates the spare cell identity to the terminal;
here, the spare cell identifier may indicate whether the own cell is a spare cell, or may indicate a list of other neighboring spare cell or multiple spare cells;
optionally, the spare cell identity may also indicate parameters for a preferred reselection;
the parameter for the preferential reselection can be a bias factor for inter-frequency and inter-system reselection decision conditions, and can also be a bias factor for same-frequency reselection cell sequencing.
Here, the spare cell identity may be indicated to the terminal by broadcast or dedicated signaling.
Step 502: the terminal judges whether to reselect to the standby cell preferentially;
here, the terminal makes the determination by one or more of the following:
currently, important messages (such as IDC indication indicating that self-interference cannot be solved) need to be sent;
the LBT failure times exceeds a threshold 1;
the LBT failure time exceeds threshold 2.
Step 503: the terminal reselects to a standby cell preferentially;
if the spare cell identifier does not indicate the parameter for the preferred reselection, the terminal preferably reselects to the spare cell, and when a plurality of spare cells exist, the terminal preferably selects one spare cell according to the existing reselection rule;
if the spare cell identity indicates a parameter for the preferred reselection, the terminal uses the indicated parameter to select a cell according to the existing reselection rule.
Step 504: the terminal enters a connection state and initiates a service in a standby cell;
step 505: after the service is completed, the terminal re-applies the general reselection rule.
Here, the terminal may enter an idle state or a light connection state by itself after the service is completed, and apply a general reselection rule.
In one embodiment, the network node (base station) of the standby cell may determine according to a certain condition, and inform the terminal that the general reselection rule is applicable.
The judging condition may be: the network node (base station) receives the specific message (such as IDC indication) from the terminal, the transmission of the service flow with special QoS requirement of the terminal is completed, and the terminal is kept in the connection state for a certain period of time in the standby cell.
The invention is described below in connection with several specific embodiments.
Example 1
This embodiment indicates for the spare cell that the own cell is a spare cell, as shown in fig. 6, including:
step 601: the spare cell broadcasts a spare cell identity in system information (for example SIB2 of NR), the spare cell identity being used to identify the own cell as a spare cell;
step 602: the terminal receives the system information of the standby cell with the standby cell identifier, and judges that the standby cell needs to be reselected preferentially when important information cannot be sent through the NR-U cell of the current service;
step 603: the terminal takes the standby cell as the highest reselection priority and reselects according to the existing reselection rule;
step 604: the terminal enters a connection state and initiates a service in a standby cell;
step 605: the terminal enters an idle state/light connection state after the service is completed, and a general reselection rule is applied.
Example two
This embodiment indicates a neighbor spare cell list for NR-U cells, as shown in fig. 7, comprising:
step 701: broadcasting adjacent standby cell lists to Idle state (Idle) and Inactive state (Inactive) terminals through system information by NR-U cells; or indicates the neighbor spare cell list to a Connected (Connected) terminal through RRC signaling;
step 702: the terminal receives the adjacent standby cell list, and judges that the important message is required to be reselected to the standby cell when the important message cannot be sent through the NR-U cell of the current service;
step 703: the terminal sets the cells in the adjacent standby cell list as higher priority than other cells, and reselects according to the existing reselection rule;
step 704: the terminal enters a connection state and initiates a service in a standby cell;
step 705: the terminal enters an idle state/light connection state after the service is completed, and a general reselection rule is applied.
Example III
This embodiment indicates for the spare cell that the own cell is a spare cell and indicates a bias factor for preferred reselection, as shown in fig. 8, including:
step 801: the spare cell broadcasts the identity of the own cell as the spare cell in system information (e.g., SIB2 for NR), and a bias factor for preferred reselection;
step 802: the terminal receives the system information with the identification and the bias factor for the preferential reselection of the standby cell, and judges that the preferential reselection is needed to the standby cell when important information cannot be sent through the NR-U cell of the current service;
step 803: the terminal applies a bias factor for the prior reselection for the standby cell and reselects according to the prior reselection rule;
step 804: the terminal enters a connection state and initiates a service in a standby cell;
step 805: the standby cell judges that the terminal service is completed, indicates the terminal to enter an idle state/light connection state, and is applicable to general reselection rules.
Example IV
This embodiment indicates a neighbor list of spare cells for NR-U cells and indicates a bias factor for preferred reselection, as shown in fig. 9, comprising:
step 901: broadcasting adjacent standby cell lists and bias factors for preferential reselection to Idle state (Idle) and Inactive state (Inactive) terminals by NR-U cells through system information; or indicates a neighbor spare cell list to a Connected (Connected) terminal through RRC signaling and a bias factor for preferred reselection;
step 902: the terminal receives the adjacent standby cell list and the bias factor for the preferential reselection, and judges that the preferential reselection is needed to the standby cell when an important message cannot be sent through the NR-U cell of the current service;
step 903: the terminal applies a bias factor for the preferential reselection to the cells in the adjacent standby cell list, and reselects according to the existing reselection rule;
step 904: the terminal enters a connection state and initiates a service in a standby cell;
step 905: the standby cell judges that the terminal service is completed, indicates the terminal to enter an idle state/light connection state, and is applicable to general reselection rules.
According to the embodiment of the invention, the terminal served by the unlicensed band cell can reselect to the standby cell (including the unlicensed band cell with low channel occupancy rate or the licensed band cell without LBT) based on the standby cell identification according to the self-needs (the sending needs and/or the LBT conditions), so that the emergency message of the terminal can be sent in time.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.
Claims (13)
1. A method for reselection of a standby cell, the method being applied to a terminal and comprising:
receiving indication information, wherein the indication information comprises a standby cell identifier; the backup cell identity is used for indicating parameters for reselection, and the parameters comprise: bias factors for inter-frequency and/or inter-system reselection decision conditions; or, a bias factor for same frequency reselection cell ordering; the backup cell identifier is further used for indicating a neighboring backup cell list, wherein the neighboring backup cell list comprises a list of one backup cell or a plurality of backup cells neighboring the current cell;
judging whether the cell needs to be reselected to a standby cell or not;
if the need of reselecting to the standby cell is judged, reselecting to the standby cell according to the standby cell identifier;
wherein the reselecting to the standby cell according to the standby cell identifier includes: and selecting a standby cell according to the original reselection rule by adopting the indicated reselection parameter, wherein the cells in the adjacent standby cell list are applicable to the indicated reselection parameter.
2. The method of claim 1, wherein after the terminal reselects to the standby cell, the method further comprises:
and the terminal enters an idle state or a light connection state after the service initiated by the standby cell is completed, and is suitable for the original reselection rule.
3. The method of claim 1, wherein the backup cell identity is further used to indicate whether the own cell is a backup cell.
4. The method of claim 1, wherein the condition that determines that reselection to a spare cell is required comprises one or more of:
currently, a preset message needs to be sent;
the LBT failure times exceed a preset threshold;
the LBT failure time exceeds a preset threshold.
5. The method of claim 2, wherein the entering an idle state or a light connection state comprises:
after the service is finished, the device automatically enters an idle state or a light connection state; or,
entering an idle state or a light connection state after receiving the notification of the network node; the notification is sent by the network node when the network node determines that a preset message sent by the terminal is received, and/or determines that transmission of a service flow preset by the terminal is completed, and/or determines that the terminal maintains a connection state for a preset duration in the standby cell.
6. A method for reselection of a standby cell, the method being applied to a network node and comprising:
setting indication information; wherein the indication information comprises a standby cell identifier; the backup cell identity is used for indicating parameters for reselection, and the parameters comprise: bias factors for inter-frequency and/or inter-system reselection decision conditions; or, a bias factor for same frequency reselection cell ordering; the backup cell identifier is further used for indicating a neighboring backup cell list, wherein the neighboring backup cell list comprises a list of one backup cell or a plurality of backup cells neighboring the current cell;
and sending the indication information, wherein the terminal is used for judging and reselecting to the standby cell based on the standby cell identification in the indication information, and the reselection to the standby cell comprises the following steps: and selecting a standby cell according to the original reselection rule by adopting the indicated reselection parameter, wherein the cells in the adjacent standby cell list are applicable to the indicated reselection parameter.
7. The method of claim 6, wherein the backup cell identity is further used to indicate whether the cell is a backup cell.
8. The method of claim 6, wherein the transmitting the indication information comprises:
the indication information is transmitted through broadcasting or dedicated signaling.
9. The method of claim 6, wherein the method further comprises: when the terminal is determined to meet one or more of the following conditions, notifying the terminal to enter an idle state or a light connection state, and applying the original reselection rule:
determining that a preset message sent by a terminal is received;
determining that the transmission of a service stream preset by a terminal is completed;
and determining that the terminal maintains the connection state for a preset duration in the standby cell.
10. A standby cell reselection apparatus, the apparatus being applied to a terminal and comprising:
a receiving module, configured to receive indication information, where the indication information includes a spare cell identifier; the backup cell identity is used for indicating parameters for reselection, and the parameters comprise: bias factors for inter-frequency and/or inter-system reselection decision conditions; or, a bias factor for same frequency reselection cell ordering; the backup cell identifier is further used for indicating a neighboring backup cell list, wherein the neighboring backup cell list comprises a list of one backup cell or a plurality of backup cells neighboring the current cell;
a determining module, configured to determine whether reselection to a standby cell is required;
a reselection module, configured to reselect to a standby cell according to the standby cell identifier when the determination module determines that reselection to the standby cell is required;
the reselection module is specifically configured to: and selecting a standby cell according to the original reselection rule by adopting the indicated reselection parameter, wherein the cells in the adjacent standby cell list are applicable to the indicated reselection parameter.
11. A standby cell reselection apparatus, the apparatus being applied to a network node, comprising:
the setting module is used for setting the indication information; wherein the indication information comprises a standby cell identifier; the backup cell identity is used for indicating parameters for reselection, and the parameters comprise: bias factors for inter-frequency and/or inter-system reselection decision conditions; or, a bias factor for same frequency reselection cell ordering; the backup cell identifier is further used for indicating a neighboring backup cell list, wherein the neighboring backup cell list comprises a list of one backup cell or a plurality of backup cells neighboring the current cell;
the sending module is used for sending the indication information, and is used for judging and reselecting to the standby cell based on the standby cell identification in the indication information by the terminal, wherein the reselection to the standby cell comprises the following steps: and selecting a standby cell according to the original reselection rule by adopting the indicated reselection parameter, wherein the cells in the adjacent standby cell list are applicable to the indicated reselection parameter.
12. A standby cell reselection apparatus, the apparatus comprising: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is adapted to perform the steps of the method of any of claims 1-5 or the steps of the method of any of claims 6-9 when the computer program is run.
13. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, realizes the steps of the method according to any one of claims 1-5 or the steps of the method according to any one of claims 6-9.
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| US11259225B2 (en) * | 2015-10-16 | 2022-02-22 | Telefonaktiebolaget Lm Ericsson (Publ) | Apparatus and method for cell frequency change procedure signal timing selection |
| WO2017193282A1 (en) * | 2016-05-10 | 2017-11-16 | 华为技术有限公司 | Uplink information transmission method, base station, and user equipment |
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| CN109392040A (en) * | 2017-08-11 | 2019-02-26 | 展讯通信（上海）有限公司 | The method of user equipment and its progress cell reselection, computer-readable medium |
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