CN111726844B - Cell reselection method, terminal and network equipment - Google Patents
Cell reselection method, terminal and network equipment Download PDFInfo
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- CN111726844B CN111726844B CN201910212530.5A CN201910212530A CN111726844B CN 111726844 B CN111726844 B CN 111726844B CN 201910212530 A CN201910212530 A CN 201910212530A CN 111726844 B CN111726844 B CN 111726844B
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- H—ELECTRICITY
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00837—Determination of triggering parameters for hand-off
- H04W36/008375—Determination of triggering parameters for hand-off based on historical data
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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
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Abstract
The embodiment of the invention provides a cell reselection method, a terminal and network equipment, wherein the cell reselection method comprises the following steps: acquiring service reference information of a terminal; determining whether the terminal can reselect a cell based on a service type according to the service reference information; and when the terminal reselects the cell based on the service type, reselecting the cell according to the received service capability information of the network equipment. The scheme of the invention can ensure that the terminal preferentially reselects the cell suitable for the service requirement.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a cell reselection method, a terminal, and a network device.
Background
Currently, the Unlicensed frequency band (NR in Unlicensed Spectrum, NR-U) and the Non-Terrestrial Network (NTN) are extensions and complements of the 5G NR.
The initial objective of NR-U is to provide access services using NR protocols in unlicensed frequency bands (including 2.4GHz, 3.5GHz, 5GHz, etc.) in order to meet the traffic demands of seamless coverage and high data rate (large bandwidth) in consideration of limited licensed spectrum resources. Due to the unlicensed nature of unlicensed spectrum, mobile network deployment faces two major challenges: the channel occupancy rate is high, the interference is serious, and the quality of an air interface is difficult to guarantee; some countries or regions require channel occupancy monitoring Before any communication is performed in the unlicensed spectrum, that is, LBT (Listen Before Talk) is successful Before communication can be performed. Therefore, the user traffic using the unlicensed band will bear the above-mentioned risk, and its delay and reliability will be affected by the LBT result.
The original intention of the NTN is to deploy a base station to an aerial (more than 8 km) flight platform (balloon, unmanned aerial vehicle, etc.) or a satellite, so that the NTN has the advantages of wide coverage, line of sight propagation, no influence from ground disasters, etc., can be used as an effective supplement of a traditional ground cellular network, and meets the network coverage requirements of remote areas or geographic isolation areas (such as islands, civil airliners, ocean vessels). However, since the base station or the antenna unit is higher from the ground, the one-way delay of air interface propagation can reach 135ms at most, that is, the total maximum air interface propagation delay in a regenerative mode (satellite-mounted gNB) is about 271ms, and the total maximum air interface propagation delay in a bent-pipe mode (satellite-mounted RRH) is about 540ms, which is unacceptable for user services with low delay or high reliability requirements (such as ultra-high reliability, ultra-low delay communication URLLC service).
Compared with the traditional ground cellular cell, the NR-U or NTN cell and the like are difficult to support low-delay or high-reliability user services.
According to the existing 3GPP protocol TS38.304, for inter-frequency (inter-frequency) and inter-system (inter-RAT) cell reselection, frequency priority setting is supported, that is, when a certain frequency band is configured as a high priority, all terminals within the configured range will preferentially reselect to a cell using the frequency band, and a cell reselection criterion with priority is applied:
if the system broadcast contains threshServingHighQ and the UE has resided in the current cell for more than 1 second, the UE reselects to the cell working at the higher priority frequency when the following conditions are met:
1) Certain cell operating at a higher priority frequency at time Treselection RAT Inner Squal>ThreshX ，HighQ (ii) a Otherwise, the UE reselects to a cell operating at a higher priority frequency when the following conditions are met:
1.1 A certain cell operating at a higher priority frequency at time Treselection RAT Inner Srxlev>ThreshX ,HighP And the UE has camped on the current cell for more than 1 second.
If the system broadcast contains threshServingLowQ and the UE has resided in the current cell for more than 1 second, the UE reselects to the cell working at the lower priority frequency when the following conditions are met:
1) Serving cell time Treselection RAT Inner Squal<ThreshServing ,LowQ (ii) a And a cell operating at a lower priority frequency is selected at time Treselection RAT Inner Squal>Thresh X,LowQ ；
Otherwise, the UE reselects to a cell operating at a lower priority frequency when the following conditions are met:
1.1 Time Treselection of serving cell RAT Inner Srxlev<Thresh Serving,LowP (ii) a And a cell operating at a lower priority frequency is selected at time Treselection RAT Inner Srxlev>Thresh X,LowP And the UE has camped on the current cell for more than 1 second.
For the reselection of cells with the same frequency (working in the same frequency band, intra-frequency) or the same frequency priority (working in different frequency bands but configured with the same frequency priority), the reselection sequence is determined by cell-ranking:
serving cell ranking parameter R s ＝Q meas,s +Q hyst -Qoffset temp ；
Neighbor cell ranking parameter R n ＝Q meas,n -Qoffset-Qoffset temp ；
Wherein Q is meas,s And Q meas,n For RSRP measurement quality, Q hyst For the velocity offset, qoffset is the inter-cell offset, qoffset temp A temporary offset amount associated with the RRC connection establishment failure.
It can be seen that for inter-frequency and inter-system cell reselection, the prioritization is at the frequency or cell (with different operating frequencies) level, i.e. all users reselect to a high priority cell without differentiating the user traffic type. For example, when the priority of the unlicensed frequency band is lower than that of the licensed frequency band (or the priority of the frequency band of the NTN cell is lower than that of the frequency band of the terrestrial cell), all users, no matter whether having the URLLC service or not, preferentially reselect to the cell (or the terrestrial cell) of the licensed frequency band, and further occupy the resource of the cell (or the terrestrial cell) of the licensed frequency band when initiating the service; when the priority of the unlicensed frequency band is higher than that of the licensed frequency band (or the priority of the frequency band of the NTN cell is higher than that of the ground cell), all users can preferentially reselect to the NR-U cell (or the NTN cell) no matter whether the users have the URLLC service or not, and the delay and reliability of the URLLC service can be greatly influenced.
For the reselection of the cells with the same frequency or the same frequency priority, the cell sorting only refers to the RSRP quality and the bias factor. For example, if the NTN cell and the ground cell operate in the same frequency band, or the NTN/NR-U cell and the ground cell operate in different frequency bands but are configured with the same frequency priority, all users, regardless of whether having a URLLC service, sort the users according to the same criteria, and reselect from high to low according to the sorting result, the delay and reliability of the URLLC service of the user reselected to the NTN/NR-U cell will be affected.
Disclosure of Invention
The invention provides a cell reselection method, a terminal and network equipment, which are used for ensuring that the terminal preferentially reselects a cell suitable for the service requirement of the terminal.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
a cell reselection method is applied to a terminal, and comprises the following steps:
acquiring service reference information of a terminal;
determining whether the terminal can reselect a cell based on the service type according to the service reference information;
and when the terminal reselects the cell based on the service type, reselecting the cell according to the received service capability information of the network equipment.
Wherein the service reference information includes: at least one of registration information of the terminal, network slice information requested by the terminal along with the request, and service history information of the terminal.
Determining whether the terminal can perform cell reselection based on a service type according to the service reference information, wherein the determining whether the terminal can perform cell reselection based on the service type comprises the following steps:
in the registration information, if the service type used by the terminal for registration is a first predetermined service type, determining that the terminal can reselect the cell based on the service type; or,
in the attachment process of the terminal, if the network slice requested by the terminal is a network slice of a second preset service type, determining that the terminal can reselect a cell based on the service type; or,
and in a preset time period, if the terminal initiates a service of a third preset service type, determining that the terminal can reselect the cell based on the service type.
Wherein the service capability information is indicated using at least one bit.
Wherein, the service capability information is carried in a system message block SIB.
Wherein the system message block comprises: at least one of a system message block SIB1, a system message block SIB2, a system message block SIB3, a system message block SIB4 and a system message block SIB 5.
Wherein the at least one bit indicates at least one of: supporting or not supporting the appointed service type; supporting or not supporting the preset service type;
slice identification supported or unsupported; quality of service, qoS, capabilities supported or unsupported; the cell type is preset.
The cell reselection is performed according to the received service capability information of the network device, and includes:
if the service capability information of a target cell of the network equipment is received, setting the reselection frequency priority of the target cell to be higher than the reselection frequency priority of other cells, and reselecting the target cell according to a different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
The cell reselection is performed according to the received service capability information of the network device, and includes:
if the service capability information of a target cell of the network equipment is received, setting the reselection frequency priority of the target cell to be lower than the reselection frequency priority of other cells, and reselecting the other cells according to a different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
The cell reselection is performed according to the received service capability information of the network device, and includes:
when the cells are sorted, if the service capability information of a target cell of network equipment is received, placing the target cell in front of other cells, and reselecting the target cell according to a common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
The cell reselection is performed according to the received service capability information of the network device, and includes:
when the cells are sorted, if the service capability information of a target cell of network equipment is received, after the target cell is placed in other cells, the other cells are reselected according to a common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
The cell reselection method further comprises the following steps: and if the terminal reselects the cell which does not support the service type of the terminal, determining whether the cell is suitable for residing, and if not, reselecting the next cell according to the reselection frequency priority or the cell sequence in the cell sequence.
Wherein determining whether the cell is suitable for camping comprises:
the terminal carries out listen before talk LBT detection, and if the LBT detection fails, the cell is determined to be not suitable for residing; or, the terminal performs propagation delay detection, and if the propagation delay is greater than a preset threshold, it is determined that the cell is not suitable for residence.
Wherein the service capability information includes: at least one of the service capability information of the local cell and the service capability information of the neighboring cell.
When the service capability information includes service capability information of a plurality of cells in the local cell and the neighboring cell, the service capability information of the plurality of cells is represented by a list.
The embodiment of the invention also provides an information sending method, which is applied to network equipment and comprises the following steps:
and sending the service capability information of the network equipment to a terminal, so that the terminal performs cell reselection according to the received service capability information when the terminal reselects the cell based on the service type.
Wherein the service capability information is indicated using at least one bit.
Wherein, the service capability information is carried in a system message block SIB.
Wherein the system message block comprises: at least one of a system message block SIB1, a system message block SIB2, a system message block SIB3, a system message block SIB4 and a system message block SIB 5.
Wherein the at least one bit indicates at least one of: supporting or not supporting the appointed service type; supporting or not supporting the preset service type; slice identification supported or unsupported;
quality of service, qoS, capabilities supported or unsupported; the cell type is preset.
An embodiment of the present invention further provides a terminal, including:
the transceiver is used for acquiring the service reference information of the terminal;
a processor, configured to determine whether the terminal may reselect a cell based on a service type according to the service reference information;
and the transceiver is also used for carrying out cell reselection according to the received service capability information of the network equipment when the terminal reselects the cell based on the service type.
Wherein the service reference information includes: at least one of registration information of the terminal, network slice information requested by the terminal along with the request, and service history information of the terminal.
Wherein the processor is specifically configured to: in the registration information, if the service type used by the terminal for registration is a first predetermined service type, determining that the terminal can reselect the cell based on the service type; or, in the attachment process of the terminal, if the network slice requested by the terminal is a network slice of a second predetermined service type, determining that the terminal can reselect the cell based on the service type; or, in a preset time period, if the terminal initiates a service of a third predetermined service type, determining that the terminal can reselect the cell based on the service type.
Wherein the service capability information is indicated using at least one bit.
Wherein the at least one bit indicates at least one of: supporting or not supporting the appointed service type; supporting or not supporting the preset service type; slice identification supported or unsupported;
quality of service, qoS, capabilities supported or unsupported; the cell type is preset.
When the transceiver performs cell reselection according to the received service capability information of the network device, the transceiver is specifically configured to: if the service capability information of a target cell of the network equipment is received, setting the reselection frequency priority of the target cell to be higher than the reselection frequency priorities of other cells, and reselecting the target cell according to a different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
When the transceiver performs cell reselection according to the received service capability information of the network device, the transceiver is specifically configured to: if the service capability information of a target cell of the network equipment is received, setting the reselection frequency priority of the target cell to be lower than the reselection frequency priority of other cells, and reselecting the other cells according to a different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
When the transceiver performs cell reselection according to the received service capability information of the network device, the transceiver is specifically configured to: when the cells are sorted, if the service capability information of a target cell of network equipment is received, placing the target cell in front of other cells, and reselecting the target cell according to a common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
When the transceiver performs cell reselection according to the received service capability information of the network device, the transceiver is specifically configured to: when the cells are sorted, if the service capability information of a target cell of network equipment is received, after the target cell is placed in other cells, the other cells are reselected according to a common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
Wherein the transceiver is further configured to: and if the terminal reselects the cell which does not support the service type of the terminal, determining whether the cell is suitable for residing, and if not, reselecting the next cell according to the reselection frequency priority or the cell sequence in the cell sequence.
Wherein, when the transceiver determines whether the cell is suitable for camping, it is specifically configured to: the terminal carries out listen before talk LBT detection, and if the LBT detection fails, the cell is determined to be not suitable for residing; or, the terminal performs propagation delay detection, and if the propagation delay is greater than a preset threshold, it is determined that the cell is not suitable for residence.
An embodiment of the present invention further provides a network device, including: and the transceiver is used for sending the service capability information of the network equipment to the terminal, so that the terminal performs cell reselection according to the received service capability information when the terminal reselects the cell based on the service type.
Wherein the service capability information is indicated using at least one bit.
Wherein the at least one bit indicates at least one of: supporting or not supporting the appointed service type; supporting or not supporting the preset service type;
slice identification supported or unsupported; quality of service, qoS, capabilities supported or unsupported; the cell type is preset.
An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
The scheme of the invention at least comprises the following beneficial effects:
according to the scheme, the service reference information of the terminal is acquired; determining whether the terminal can reselect a cell based on the service type according to the service reference information; and when the terminal reselects the cell based on the service type, the cell is reselected according to the received service capability information of the network equipment. Therefore, the terminal can be preferentially reselected to the cell suitable for the service requirement.
Drawings
Fig. 1 is a flowchart of a cell reselection method according to the present invention.
Fig. 2 is a schematic diagram of the architecture of the terminal according to the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a cell reselection method, which is applied to a terminal, and the method includes:
and 13, when the terminal reselects the cell based on the service type, reselecting the cell according to the received service capability information of the network equipment.
According to the scheme of the invention, the service reference information of the terminal is acquired; determining whether the terminal can reselect a cell based on the service type according to the service reference information; and when the terminal reselects the cell based on the service type, reselecting the cell according to the received service capability information of the network equipment. Therefore, the terminal can be preferentially reselected to the cell suitable for the service requirement.
In an embodiment of the present invention, the step 12 may include at least one of the following steps 121, 122, and 123:
step 121, in the registration information, if the service type used by the terminal for registration is a first predetermined service type, determining that the terminal can reselect the cell based on the service type; for example, the first predetermined service type is URLLC service, and the terminal registered to use a certain service type, for example, V2X terminal registered to use URLLC service;
step 122, in the attachment process of the terminal, if the network slice requested by the terminal is a network slice of a second predetermined service type, determining that the terminal can reselect a cell based on the service type; for example, during the attach process, a network slice of a certain service type, such as a URLLC slice, is requested;
step 123, in a preset time period, if the terminal initiates a service of a third predetermined service type, determining that the terminal can reselect a cell based on the service type; for example, a certain type of service is initiated within a certain time, such as a URLLC service being initiated within a certain time.
In the above embodiments of the present invention, the service capability information uses at least one bit for indication. The at least one bit indicates at least one of: supporting or not supporting the appointed service type; supporting or not supporting the preset service type; slice identification supported or unsupported; quality of service, qoS, capabilities supported or unsupported; the cell type is preset.
The service capability information may be carried in a system message block SIB. The system message block includes: at least one of a system message block SIB1, a system message block SIB2, a system message block SIB3, a system message block SIB4 and a system message block SIB 5.
Here, the network device (base station) broadcast service capability information may be 1-bit information indicating that a certain agreed service type is supported (or not supported), n-bit information indicating what service type is supported (or not supported), n-bit information indicating supported (or not supported) slice identifier (such as S-NSSAI), n-bit information indicating supported (or not supported) QoS capability (such as delay, packet error rate), or n-bit information indicating a special cell type (such as NR-U, NTN cell);
the service capability information may be broadcast in at least one of the following system messages: system message block 1 (SIB 1 for access control), system message block 2 (SIB 2 for reselection common), system message block 3 (SIB 3 for same-frequency reselection), system message block 4 (SIB 4 for inter-frequency reselection), and system message block 5 (SIB 5 for inter-system reselection);
wherein the service capability information includes: at least one of the service capability information of the local cell and the service capability information of the neighboring cell. And when the service capability information comprises the service capability information of a plurality of cells in the cell and the adjacent cell, the service capability information of the plurality of cells is represented by a list.
Here, the service capability information may be used to indicate the cell and may also be used to indicate other neighboring cells; when the service capability information is used to indicate a plurality of cells, it may be in the form of a list (list); and of course is not limited to the form of a list.
In an embodiment of the present invention, the step 13 may include:
step 131, if receiving service capability information of a target cell of a network device, setting a reselection frequency priority of the target cell to be higher than reselection frequency priorities of other cells, and reselecting the target cell according to a pilot frequency or pilot system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
Step 132, if the service capability information of the target cell of the network device is received, setting the reselection frequency priority of the target cell to be lower than the reselection frequency priority of other cells, and reselecting the other cells according to the different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
Step 133, when the cells are sorted, if the service capability information of the target cell of the network device is received, placing the target cell in front of other cells, and reselecting the target cell according to the common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
134, when the cells are sorted, if the service capability information of the target cell of the network equipment is received, placing the target cell in another cell, and reselecting the other cell according to the same-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
Further, in the foregoing embodiment of the present invention, the method may further include: and if the terminal reselects the cell which does not support the service type of the terminal, determining whether the cell is suitable for residing, and if not, reselecting the next cell according to the reselection frequency priority or the cell sequence in the cell sequence.
Wherein determining whether the cell is suitable for camping comprises: the terminal carries out listen before talk LBT detection, and if the LBT detection fails, the cell is determined to be not suitable for residing; or, the terminal performs propagation delay detection, and if the propagation delay is greater than a preset threshold, it is determined that the cell is not suitable for residence.
In the above embodiments of the present invention, a network node (base station) broadcasts service capability information; the terminal judges whether a cell reselection rule based on the service type is applicable or not; if the service capability is applicable, the terminal performs cell reselection based on the service type by referring to the service capability; if reselecting to the cell not supporting its service type, the terminal can perform special detection to determine whether the cell is suitable for residing, and if not, reselecting to the next cis-cell.
When the terminal judges whether the cell reselection rule based on the service type is applicable, the terminal performs the judgment in at least one of the following modes: a terminal registered to use a certain service type, such as a V2X terminal using URLLC service; requesting a network slice of a certain service type in an attachment process, such as a URLLC slice; a certain traffic type, such as URLLC traffic, is initiated within a certain time. And if the identifier is applicable, the terminal performs cell reselection based on the service type by referring to the identifier.
The cell reselection of the terminal based on the service type comprises at least one of the following modes:
1) The reselection frequency priority of the cell with the broadcast service capability information as support is listed as the reselection frequency priority higher than the cell without the broadcast service capability information, and reselection is carried out according to the different frequency or different system cell reselection rule;
2) The broadcast service capability information is a cell reselection frequency priority which is not supported, the cell reselection frequency priority is listed as a cell reselection frequency priority which is lower than the cell without the broadcast service capability information, and reselection is carried out according to a pilot frequency or inter-system cell reselection rule;
3) When the cells are sorted, placing the cells which support the broadcast service capability information in front of the cells which do not broadcast the service capability information, and reselecting according to the cell reselection rule with the same frequency priority;
4) When the cells are sorted, placing the cells with the broadcast service capability information as unsupported behind the cells without the broadcast service capability information, and reselecting according to the cell reselection rule with the same frequency priority;
if reselecting to the cell not supporting its service type, the terminal can perform special detection to determine whether the cell is suitable for residing, and if not, reselecting to the next cis-cell. The special detection may be LBT, which fails and is not suitable for residence; or propagation delay detection, and if the propagation delay is greater than a certain threshold, the terminal is not suitable for residence.
For example, in the above embodiment, in a situation where a terminal with a URLLC service and a network with NR-U cells are deployed, when the service capability information broadcast by the base station adopts n bits to indicate that the type of the special cell is NR-U, the NR-U cell or the common cell broadcasts the NR-U cell identifier of the local cell or the neighboring cell in the system information; the V2X terminal judges that the V2X terminal is suitable for a cell reselection rule based on the service type according to the registered V2X terminal type, the requested URLLC network slice or the previously initiated URLLC service; the V2X terminal sets the working frequency band of the NR-U cell as a low priority according to the received NR-U cell identification, and reselects according to the different frequency or different system cell reselection rule; if reselecting to the NR-U cell, the V2X terminal performs LBT, and if the LBT fails, reselecting to the next cis-cell.
For another example, in a situation where a terminal with a URLLC service and a network with NTN cells are deployed, an NTN cell or a common cell broadcasts an NTN cell identifier of the local cell or a neighboring cell in system information; the V2X terminal judges that the V2X terminal is suitable for a cell reselection rule based on a low-delay and high-reliability service according to the registered V2X terminal type, the requested URLLC network slice or the previously initiated URLLC service; the V2X terminal places the NTN cell in a common cell during cell sequencing according to the received NTN cell identification, and reselects according to the cell reselection rule with the same frequency priority; and if the cell is reselected to the NTN cell, the V2X terminal carries out propagation delay detection, and if the propagation delay is greater than a certain threshold value, the cell is reselected to the next cis-cell.
In the above embodiment of the present invention, the terminal may receive the service capability information broadcast by the network node (base station), and determine whether the cell reselection rule based on the service type is applicable according to the terminal registration information, slice information, or service history information, and the like, and perform cell reselection according to the corresponding rule, and further detect the reselection result, so as to ensure that the user terminal preferentially reselects the cell suitable for the service requirement of the user terminal.
The embodiment of the invention also provides an information sending method, which is applied to network equipment and comprises the following steps: and sending the service capability information of the network equipment to a terminal, so that the terminal performs cell reselection according to the received service capability information when the terminal reselects a cell based on a service type.
Wherein the service capability information is indicated using at least one bit. The service capability information is carried in a system message block SIB. The system message block includes: at least one of a system message block SIB1, a system message block SIB2, a system message block SIB3, a system message block SIB4 and a system message block SIB 5.
Wherein the at least one bit indicates at least one of: supporting or not supporting the appointed service type; supporting or not supporting the preset service type; slice identification supported or unsupported; quality of service, qoS, capabilities supported or unsupported; the cell type is preset.
It should be noted that all the implementations of the terminal-side method described above are applicable to this embodiment, and the same technical effects can be achieved.
As shown in fig. 2, an embodiment of the present invention further provides a terminal 20, including:
a transceiver 21, configured to acquire service reference information of a terminal;
a processor 22, configured to determine whether the terminal can perform cell reselection based on a service type according to the service reference information;
the transceiver 21 is further configured to perform cell reselection according to the received service capability information of the network device when the terminal reselects a cell based on the service type.
Wherein the service reference information includes: at least one of registration information of the terminal, network slice information requested by the terminal along with the request, and service history information of the terminal.
Wherein the processor 22 is specifically configured to: in the registration information, if the service type used by the terminal for registration is a first predetermined service type, determining that the terminal can reselect the cell based on the service type; or, in the attachment process of the terminal, if the network slice requested by the terminal is a network slice of a second predetermined service type, determining that the terminal can reselect the cell based on the service type; or, in a preset time period, if the terminal initiates a service of a third predetermined service type, determining that the terminal can reselect the cell based on the service type.
Wherein the service capability information is indicated using at least one bit.
Wherein the at least one bit indicates at least one of: supporting or not supporting the appointed service type; supporting or not supporting the preset service type; slice identification supported or unsupported;
quality of service, qoS, capabilities supported or unsupported; the cell type is preset.
When the transceiver 21 performs cell reselection according to the received service capability information of the network device, the transceiver is specifically configured to: if the service capability information of a target cell of the network equipment is received, setting the reselection frequency priority of the target cell to be higher than the reselection frequency priority of other cells, and reselecting the target cell according to a different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
When the transceiver 21 performs cell reselection according to the received service capability information of the network device, the method is specifically configured to: if the service capability information of a target cell of the network equipment is received, setting the reselection frequency priority of the target cell to be lower than the reselection frequency priority of other cells, and reselecting the other cells according to a different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
When the transceiver performs cell reselection according to the received service capability information of the network device, the transceiver is specifically configured to: when the cells are sorted, if the service capability information of a target cell of network equipment is received, placing the target cell in front of other cells, and reselecting the target cell according to a common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
When the transceiver performs cell reselection according to the received service capability information of the network device, the transceiver is specifically configured to: when the cells are sorted, if the service capability information of a target cell of network equipment is received, after the target cell is placed in other cells, the other cells are reselected according to a common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
Wherein the transceiver is further configured to: and if the terminal reselects the cell which does not support the service type of the terminal, determining whether the cell is suitable for residing, and if not, reselecting the next cell according to the reselection frequency priority or the cell sequence in the cell sequence.
Wherein, when the transceiver determines whether the cell is suitable for camping, it is specifically configured to: the terminal carries out listen before talk LBT detection, and if the LBT detection fails, the cell is determined to be not suitable for residing; or, the terminal performs propagation delay detection, and if the propagation delay is greater than a preset threshold, it is determined that the cell is not suitable for residence.
It should be noted that the terminal is a terminal corresponding to the method shown in fig. 1, and all implementation manners in the method embodiment are applicable to the embodiment of the terminal, and the same technical effect can be achieved. The terminal may further include: the memory 23, the transceiver 21 and the processor 22, and the transceiver 21 and the memory 23 may be connected through a bus interface, the function of the transceiver 21 may be implemented by the processor 22, and the function of the processor 22 may also be implemented by the transceiver 21.
An embodiment of the present invention further provides a network device, including: and the transceiver is used for sending the service capability information of the network equipment to the terminal, so that the terminal performs cell reselection according to the received service capability information when the terminal reselects the cell based on the service type.
Wherein the service capability information is indicated using at least one bit.
Wherein the at least one bit indicates at least one of: supporting or not supporting the appointed service type; supporting or not supporting the preset service type; slice identification supported or unsupported; quality of service, qoS, capabilities supported or unsupported; the cell type is preset.
It should be noted that the network device is a device corresponding to the method on the network device side, and all implementation manners in the method embodiments are applicable to the embodiment of the network device, and the same technical effect can be achieved. The network device may further include: the processor, the memory, the transceiver and the processor, and the transceiver and the memory can be connected through a bus interface, the function of the transceiver can be realized by the processor, and the function of the processor can also be realized by the transceiver.
An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above. When the communication device is a terminal, all the implementation manners in the above method embodiment for executing the terminal-side method shown in fig. 1 are applicable to the embodiment, and the same technical effect can be achieved. When the communication device is a network device, for example, the method on the network device side is executed, and all implementation manners in the method embodiment are applicable to the embodiment and can achieve the same technical effect.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above. All the implementation manners in the above method embodiment are applicable to this embodiment, and the same technical effect can be achieved.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.
The object of the invention is thus also achieved by a program or a set of programs running on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product containing program code for implementing the method or device. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that such storage media can be any known storage media or any storage media developed in the future. It is also noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (34)
1. A cell reselection method is applied to a terminal, and comprises the following steps:
acquiring service reference information of a terminal;
determining whether the terminal can reselect a cell based on the service type according to the service reference information;
when the terminal reselects the cell based on the service type, reselecting the cell according to the received service capability information of the network equipment;
the service reference information includes: at least one of registration information of the terminal, network slice information requested by the terminal in response to the request, and service history information of the terminal.
2. The cell reselection method of claim 1, wherein determining whether the terminal can perform cell reselection based on a service type according to the service reference information comprises:
in the registration information, if the service type used by the terminal for registration is a first predetermined service type, determining that the terminal can reselect the cell based on the service type; or,
in the attachment process of the terminal, if the network slice requested by the terminal is a network slice of a second preset service type, determining that the terminal can reselect a cell based on the service type; or,
and in a preset time period, if the terminal initiates a service of a third preset service type, determining that the terminal can reselect the cell based on the service type.
3. The cell reselection method of claim 1, wherein said service capability information is indicated using at least one bit.
4. The cell reselection method of claim 3, wherein the service capability information is carried in a System message Block (SIB).
5. The cell reselection method of claim 4, wherein the system message block comprises: at least one of a system message block SIB1, a system message block SIB2, a system message block SIB3, a system message block SIB4 and a system message block SIB 5.
6. The cell reselection method of claim 3, wherein said at least one bit indicates at least one of:
supporting or not supporting the appointed service type;
supporting or not supporting the preset service type;
slice identification supported or unsupported;
quality of service, qoS, capabilities supported or unsupported;
the cell type is preset.
7. The cell reselection method according to claim 6, wherein performing cell reselection according to the received service capability information of the network device comprises:
if the service capability information of a target cell of the network equipment is received, setting the reselection frequency priority of the target cell to be higher than the reselection frequency priorities of other cells, and reselecting the target cell according to a different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
8. The cell reselection method according to claim 6, wherein performing cell reselection according to the received service capability information of the network device comprises:
if the service capability information of a target cell of the network equipment is received, setting the reselection frequency priority of the target cell to be lower than the reselection frequency priority of other cells, and reselecting the other cells according to a different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
9. The cell reselection method according to claim 6, wherein performing cell reselection according to the received service capability information of the network device comprises:
when the cells are sorted, if the service capability information of a target cell of network equipment is received, placing the target cell in front of other cells, and reselecting the target cell according to a common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
10. The cell reselection method according to claim 6, wherein performing cell reselection according to the received service capability information of the network device comprises:
when the cells are sorted, if the service capability information of a target cell of network equipment is received, after the target cell is placed in other cells, the other cells are reselected according to a common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
11. The cell reselection method of any of claims 7 to 10, further comprising:
and if the terminal reselects the cell which does not support the service type of the terminal, determining whether the cell is suitable for residing, and if not, reselecting the next cell according to the reselection frequency priority or the cell sequence in the cell sequence.
12. The cell reselection method of claim 11, wherein determining whether the cell is suitable for camping comprises:
the terminal carries out listen before talk LBT detection, and if the LBT detection fails, the cell is determined to be not suitable for residing; or,
and the terminal detects the propagation delay, and if the propagation delay is greater than a preset threshold value, the cell is determined to be not suitable for residing.
13. The cell reselection method of claim 1, wherein the service capability information comprises: at least one of the service capability information of the local cell and the service capability information of the neighboring cell.
14. The cell reselection method of claim 13, wherein when the service capability information includes service capability information of multiple cells in the current cell and neighboring cells, the service capability information of the multiple cells is represented by a list.
15. A method for sending information, which is applied to a network device, the method comprising:
sending the service capability information of the network equipment to a terminal, and enabling the terminal to determine whether the terminal can reselect the cell based on the service type according to the obtained service reference information of the terminal, and then reselecting the cell according to the received service capability information when the cell based on the service type reselects;
the service reference information includes: at least one of registration information of the terminal, network slice information requested by the terminal in response to the request, and service history information of the terminal.
16. The method of claim 15, wherein the service capability information is indicated by at least one bit.
17. The method of claim 16, wherein the service capability information is carried in a system message block (SIB).
18. The method of transmitting information according to claim 17, wherein the system message block comprises: at least one of a system message block SIB1, a system message block SIB2, a system message block SIB3, a system message block SIB4 and a system message block SIB 5.
19. The method according to claim 16, wherein the at least one bit indicates at least one of:
supporting or not supporting the appointed service type;
supporting or not supporting the preset service type;
slice identification supported or unsupported;
quality of service, qoS, capabilities supported or unsupported;
the cell type is preset.
20. A terminal, comprising:
the transceiver is used for acquiring the service reference information of the terminal;
a processor, configured to determine whether the terminal may reselect a cell based on a service type according to the service reference information;
the transceiver is also used for carrying out cell reselection according to the received service capability information of the network equipment when the terminal reselects the cell based on the service type;
the service reference information includes: at least one of registration information of the terminal, network slice information requested by the terminal along with the request, and service history information of the terminal.
21. The terminal of claim 20, wherein the processor is specifically configured to: in the registration information, if the service type used by the terminal for registration is a first predetermined service type, determining that the terminal can reselect the cell based on the service type; or, in the attachment process of the terminal, if the network slice requested by the terminal is a network slice of a second predetermined service type, determining that the terminal can reselect the cell based on the service type; or, in a preset time period, if the terminal initiates a service of a third predetermined service type, determining that the terminal can reselect the cell based on the service type.
22. The terminal of claim 20, wherein the service capability information is indicated using at least one bit.
23. The terminal of claim 22, wherein the at least one bit indicates at least one of:
supporting or not supporting the appointed service type;
supporting or not supporting the preset service type;
slice identification supported or unsupported;
quality of service, qoS, capabilities supported or unsupported;
the cell type is preset.
24. The terminal according to claim 23, wherein the transceiver, when performing cell reselection according to the received service capability information of the network device, is specifically configured to:
if the service capability information of a target cell of the network equipment is received, setting the reselection frequency priority of the target cell to be higher than the reselection frequency priority of other cells, and reselecting the target cell according to a different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an appointed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
25. The terminal according to claim 23, wherein the transceiver, when performing cell reselection according to the received service capability information of the network device, is specifically configured to:
if the service capability information of a target cell of the network equipment is received, setting the reselection frequency priority of the target cell to be lower than the reselection frequency priority of other cells, and reselecting the other cells according to a different-frequency or different-system cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of the appointed service type, the preset service type, the slice identifier, the QoS capability and the preset cell type.
26. The terminal according to claim 23, wherein the transceiver, when performing cell reselection according to the received service capability information of the network device, is specifically configured to:
when the cells are sorted, if the service capability information of a target cell of network equipment is received, placing the target cell in front of other cells, and reselecting the target cell according to a common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell supports at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
27. The terminal according to claim 23, wherein the transceiver, when performing cell reselection according to the received service capability information of the network device, is specifically configured to:
when the cells are sorted, if the service capability information of a target cell of network equipment is received, after the target cell is placed in other cells, the other cells are reselected according to a common-frequency priority cell reselection rule; the other cells are cells which do not receive the service capability information, and the target cell does not support at least one of an agreed service type, a preset service type, a slice identifier, a QoS capability and a preset cell type.
28. The terminal of any of claims 24 to 27, wherein the transceiver is further configured to:
and if the terminal reselects the cell which does not support the service type of the terminal, determining whether the cell is suitable for residing, and if not, reselecting the next cell according to the reselection frequency priority or the cell sequence in the cell sequence.
29. The terminal of claim 28, wherein the transceiver, when determining whether the cell is suitable for camping, is configured to:
the terminal carries out listen before talk LBT detection, and if the LBT detection fails, the cell is determined to be not suitable for residing; or,
and the terminal detects the propagation delay, and if the propagation delay is greater than a preset threshold value, the cell is determined not to be suitable for residing.
30. A network device, comprising: the transceiver is used for sending the service capability information of the network equipment to a terminal, so that the terminal determines whether the terminal can perform cell reselection based on the service type according to the acquired service reference information of the terminal, and performs cell reselection according to the received service capability information when the terminal performs cell reselection based on the service type;
the service reference information includes: at least one of registration information of the terminal, network slice information requested by the terminal along with the request, and service history information of the terminal.
31. The network device of claim 30, wherein the service capability information is indicated using at least one bit.
32. The network device of claim 31, wherein the at least one bit indicates at least one of:
supporting or not supporting the appointed service type;
supporting or not supporting the preset service type;
slice identification supported or unsupported;
quality of service, qoS, capabilities supported or unsupported;
the cell type is preset.
33. A communication device, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any of claims 1 to 14, or the method of any of claims 15 to 19.
34. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 14 or the method of any one of claims 15 to 19.
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| CN116420385A (en) * | 2020-10-15 | 2023-07-11 | 华为技术有限公司 | Cell selection method and device |
| CN116391391A (en) * | 2020-10-22 | 2023-07-04 | 苹果公司 | Cell selection and reselection criteria for non-terrestrial network (NTN) networks |
| CN116325910A (en) * | 2021-01-08 | 2023-06-23 | Oppo广东移动通信有限公司 | Wireless communication method and terminal device |
| CN115119271A (en) * | 2021-03-23 | 2022-09-27 | 维沃移动通信有限公司 | Cell reselection method, device and terminal |
| CN115734299A (en) * | 2021-08-31 | 2023-03-03 | 展讯通信（上海）有限公司 | Cell reselection method and device and terminal equipment |
| US11792712B2 (en) | 2021-12-23 | 2023-10-17 | T-Mobile Usa, Inc. | Cell reselection priority assignment based on performance triggers |
| CN116033502B (en) * | 2023-02-01 | 2023-11-17 | 上海移远通信技术股份有限公司 | Method and apparatus for wireless communication |
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