CN111436092A - Method, terminal and network side equipment for selecting resident cell in unauthorized frequency band - Google Patents

Method, terminal and network side equipment for selecting resident cell in unauthorized frequency band Download PDF

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Publication number
CN111436092A
CN111436092A CN201910026933.0A CN201910026933A CN111436092A CN 111436092 A CN111436092 A CN 111436092A CN 201910026933 A CN201910026933 A CN 201910026933A CN 111436092 A CN111436092 A CN 111436092A
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China
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information
cell
rssi
frequency band
resource pool
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CN201910026933.0A
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CN111436092B (en
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张晓然
胡南
李男
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • 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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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a method, a terminal and network side equipment for selecting a resident cell in an unauthorized frequency band, wherein the method comprises the following steps: acquiring channel occupation information on an unauthorized frequency band; selecting a resident cell from cells on an unauthorized frequency band according to the channel occupation information; in the embodiment of the invention, the terminal selects the more suitable cell for residing by using the channel occupation information as a reference factor in the process of selecting the residing cell in the unauthorized frequency band, so that the accuracy of selecting the residing cell is improved, and the residing efficiency of the cell is improved.

Description

Method, terminal and network side equipment for selecting resident cell in unauthorized frequency band
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a terminal, and a network device for selecting a cell to camp on in an unlicensed frequency band.
Background
The unauthorized frequency band is accessed in a competition mode, a plurality of terminals and base stations can seize a channel on the same frequency resource, the blind idle of the channel needs to be monitored before each transmission, the idle of the channel is confirmed, and the terminals and the base stations working on the unauthorized frequency band can transmit data.
In the prior art, the idle state and the deactivated state only consider cell signal strength and signal quality (such as reference signal received power RSRP and reference signal received quality RSRQ) when the terminal selects a camping cell; in the process that the terminal selects the resident cell, determining a certain cell as the resident cell according to the signal intensity and the signal quality of the cell; however, if the cell has a strong signal, but because the occupancy rate of the channel where the cell is located is very high, both the base station and the terminal are difficult to rob the opportunity to transmit data, the cell is not suitable for residing; therefore, the existing determination method of the camping cell is not accurate enough.
Disclosure of Invention
The embodiment of the invention aims to provide a method, a terminal and network side equipment for selecting a resident cell in an unauthorized frequency band, so as to solve the problem that the resident cell in the unauthorized frequency band is not accurate enough in the prior art.
In order to solve the above problem, an embodiment of the present invention provides a method for selecting a cell to camp on in an unlicensed frequency band, where the method is applied to a terminal, and the method includes:
acquiring channel occupation information on an unauthorized frequency band;
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information.
The acquiring of the channel occupation information on the unlicensed frequency band includes:
the method comprises the steps of measuring the Received Signal Strength Indication (RSSI) of a cell on an unauthorized frequency band, and acquiring channel occupation information on the unauthorized frequency band, wherein the channel occupation information comprises the following steps: at least one of RSSI, channel occupancy, and channel idleness.
The acquiring of the channel occupation information on the unlicensed frequency band includes:
receiving channel occupation information on an unlicensed frequency band sent by a network side device, wherein the channel occupation information comprises: at least one of RSSI, channel occupancy, and channel idleness.
Wherein the method further comprises:
receiving first threshold information for cell camping sent by a network side device, where the first threshold information includes at least one of the following information:
an RSSI threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value for evaluating the channel idle rate;
selecting a resident cell from cells on an unlicensed frequency band according to the channel occupation information, including:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information and the first threshold information.
Wherein the method further comprises:
receiving load information of a cell on an unauthorized frequency band, which is sent by network side equipment;
selecting a resident cell from cells on an unlicensed frequency band according to the channel occupation information and the first threshold information, including:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information, the first threshold information and the load information.
Wherein the method further comprises:
receiving configuration information of RSSI measurement sent by network side equipment;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating resources to be measured in the resource pool;
the measuring the Received Signal Strength Indicator (RSSI) of the cell on the unauthorized frequency band to acquire the channel occupation information on the unauthorized frequency band comprises the following steps:
and measuring according to the configuration information of the RSSI measurement, and acquiring the channel occupation information on the unauthorized frequency band.
Wherein the method further comprises:
receiving second threshold information sent by a network side device, wherein the second threshold information comprises: a range value of signal power;
the method further comprises the following steps:
and performing cell reselection according to at least one of the second threshold information and the channel occupation information on the unlicensed frequency band and the cell measurement result on the unlicensed frequency band.
The embodiment of the invention also provides a method for selecting a resident cell in the unauthorized frequency band, which is applied to network side equipment and comprises the following steps:
transmitting channel occupation information on an unauthorized frequency band to a terminal; alternatively, the first and second electrodes may be,
sending first threshold information for cell camping to a terminal, wherein the first threshold information comprises at least one of the following information:
a Received Signal Strength Indication (RSSI) threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value used to estimate channel idle rate.
Wherein the method further comprises:
and sending the load information of the cell on the unlicensed frequency band to the terminal.
Wherein the method further comprises:
sending configuration information of RSSI measurement to a terminal;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
and resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating the resource to be measured in the resource pool.
Wherein the method further comprises:
sending second threshold information to a terminal, wherein the second threshold information comprises: range values of signal power.
The embodiment of the invention also provides a terminal, which comprises a processor and a transceiver, wherein the processor is used for executing the following processes:
acquiring channel occupation information on an unauthorized frequency band;
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information.
Wherein the processor is further configured to:
the method comprises the steps of measuring the Received Signal Strength Indication (RSSI) of a cell on an unauthorized frequency band, and acquiring channel occupation information on the unauthorized frequency band, wherein the channel occupation information comprises the following steps: at least one of RSSI, channel occupancy, and channel idleness.
Wherein the transceiver is to:
receiving channel occupation information on an unlicensed frequency band sent by a network side device, wherein the channel occupation information comprises: at least one of RSSI, channel occupancy, and channel idleness.
Wherein the transceiver is further configured to:
receiving first threshold information for cell camping sent by a network side device, where the first threshold information includes at least one of the following information:
an RSSI threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value for evaluating the channel idle rate;
the processor is further configured to:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information and the first threshold information.
Wherein the transceiver is further configured to:
receiving load information of a cell on an unauthorized frequency band, which is sent by network side equipment;
the processor is further configured to:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information, the first threshold information and the load information.
Wherein the transceiver is further configured to:
receiving configuration information of RSSI measurement sent by network side equipment;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating resources to be measured in the resource pool;
the processor is further configured to:
and measuring according to the configuration information of the RSSI measurement, and acquiring the channel occupation information on the unauthorized frequency band.
Wherein the transceiver is further configured to:
receiving second threshold information for cell reselection, which is sent by a network side device, wherein the second threshold information includes: a range value of signal power;
the processor is further configured to:
and performing cell reselection according to at least one of the second threshold information and the channel occupation information on the unlicensed frequency band and the cell measurement result on the unlicensed frequency band.
The embodiment of the invention also provides a device for selecting the resident cell in the unauthorized frequency band, which is applied to a terminal and comprises the following steps:
an occupation determining module, configured to obtain channel occupation information on an unlicensed frequency band;
and the cell selection module is used for selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information.
The embodiment of the present invention further provides a network side device, which includes a processor and a transceiver, where the processor is configured to control the transceiver to execute the following processes:
transmitting channel occupation information on an unauthorized frequency band to a terminal; alternatively, the first and second electrodes may be,
sending first threshold information for cell camping to a terminal, wherein the first threshold information comprises at least one of the following information:
a Received Signal Strength Indication (RSSI) threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value used to estimate channel idle rate.
Wherein the transceiver is further configured to:
and sending the load information of the cell on the unlicensed frequency band to the terminal.
Wherein the transceiver is further configured to:
sending configuration information of RSSI measurement to a terminal;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
and resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating the resource to be measured in the resource pool.
Wherein the transceiver is further configured to:
sending second threshold information to a terminal, wherein the second threshold information comprises: range values of signal power.
The embodiment of the invention also provides a device for selecting a resident cell in an unauthorized frequency band, which is applied to network side equipment and comprises the following steps:
the transmitting module is used for transmitting channel occupation information on the unauthorized frequency band to the terminal; or, the apparatus is configured to send first threshold information for cell camping to a terminal, where the first threshold information includes at least one of the following information:
a Received Signal Strength Indication (RSSI) threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value used to estimate channel idle rate.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps in the method for selecting a cell to camp on in an unlicensed frequency band as described above.
The technical scheme of the invention at least has the following beneficial effects:
in the cell residence method, the terminal and the network side device of the unlicensed frequency band, the terminal selects the more suitable cell for residence by using the channel occupation information as a reference factor in the process of selecting the residence cell by the unlicensed frequency band, so that the accuracy of cell residence selection is improved, and the cell residence efficiency is improved.
Drawings
Fig. 1 is a flowchart illustrating steps of a method for selecting a cell to camp on in an unlicensed frequency band according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a second step of the method for selecting a camping cell in an unlicensed frequency band according to the embodiment of the present invention;
fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram illustrating an apparatus for selecting a cell to camp on in an unlicensed frequency band according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;
fig. 6 is a second schematic structural diagram of an apparatus for selecting a camping cell in an unlicensed frequency band according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a method for selecting a cell to camp on in an unlicensed frequency band, which is applied to a terminal, and includes:
and step 11, acquiring channel occupation information on the unauthorized frequency band.
And step 12, selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information.
In this step, the cell on the unlicensed frequency band includes: a serving cell of the terminal and neighbor cells of the serving cell.
In the above embodiment of the present invention, the channel occupancy information on the unlicensed frequency band may indicate the blind idle of the channel; in the embodiment of the invention, in the process of selecting the resident cell by the terminal, because the unauthorized frequency band is accessed in a competition mode, the blind idle of the channel is taken into consideration, namely the blind idle of the channel is taken as a reference factor for residing the cell, so that the terminal in an idle state or a deactivated state selects a more suitable cell for residing.
Further, in the foregoing embodiment of the present invention, step 12 includes:
firstly, judging whether a cell measurement result on an unlicensed frequency band meets a residence condition (the residence condition is the same as that in the prior art and is not described in detail herein); and then, aiming at the cells meeting the resident conditions, selecting resident cells according to the channel occupation information.
Or, modify the existing camping condition, and add the channel occupancy information to the existing camping condition, for example, the modified camping condition includes not only the cell signal strength and the signal quality, but also the channel occupancy information.
Optionally, the cell measurement result at least includes: cell signal strength and signal quality, e.g., reference signal received power, RSRP, and reference signal received quality, RSRQ.
In short, the terminal in the idle state or the deactivated state comprehensively selects the resident cell according to the cell signal strength, the cell signal quality and the channel occupation information, so that the accuracy of selecting the resident cell is improved.
The method for using the channel occupation information by the terminal comprises the following steps: the terminal measures and judges whether the cell measurement result meets the cell residence condition, and the terminal sorts the measurement results of all the cells meeting the residence condition according to a certain rule, for example, the cell with the highest power is highest in ranking; the terminal determines a resident cell according to a certain rule, for example, the terminal resides in a cell with the highest ranking; when the highest-ranking cell is multiple, the cell with the lowest RSSI or the cell with the lowest channel occupancy rate or the cell with the highest channel idle rate is resided.
As an example, step 11 comprises:
the method comprises the steps of measuring the Received Signal Strength Indication (RSSI) of a cell on an unauthorized frequency band, and determining channel occupation information on the unauthorized frequency band, wherein the channel occupation information comprises the following steps: at least one of RSSI, channel occupancy, and channel idleness.
As another example, step 11 includes:
receiving channel occupation information on an unlicensed frequency band sent by a network side device, wherein the channel occupation information comprises: at least one of RSSI, channel occupancy, and channel idleness.
Specifically, the channel occupancy information may be the channel occupancy of one channel or multiple (sub) channels; the occupancy may be characterized by a percentage (e.g., a percentage of samples above a certain RSSI threshold), or the occupancy may be identified by several levels (e.g., 0-5, with 0 being the lowest level, indicating the channel is the least idle; 5 being the highest level, indicating the channel is the least busy). In this case, it is necessary to exchange channel occupancy information between cells, for example, NR base stations through an Xn interface or a core network.
The embodiment of the invention provides at least two schemes, which are respectively as follows:
according to the first scheme, a terminal measures channel occupation information and selects a resident cell according to the measured channel occupation information;
scheme II: the network side equipment sends the channel occupation information, and the terminal selects the resident cell according to the channel occupation information sent by the network side equipment.
For the first solution, the method provided in the embodiment of the present invention further includes:
receiving first threshold information for cell camping sent by a network side device, where the first threshold information includes at least one of the following information:
an RSSI threshold value;
a duty cycle threshold value (in the form of a percentage) and a first RSSI value (dBm) for estimating duty cycle;
a channel idleness threshold value (in the form of a percentage) and a second RSSI value (dBm) for estimating channel idleness;
a duty cycle level and a plurality of RSSI values (dBm) for evaluating the duty cycle level.
Accordingly, step 12 comprises:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information and the first threshold information.
Preferably, the network side device broadcasts the first threshold information of the local cell and the neighboring cell in the system message.
The RSSI threshold value represents an RSSI value required by residing in the cell or residing in the frequency point; the RSSI threshold value may be a total received signal power within a certain measurement bandwidth, or an average of the total received signal power per RE (Resource Element).
The terminal uses the RSSI threshold value: the terminal receives first threshold information in the broadcast message, compares the RSSI measurement result with the RSSI threshold value, considers that the cell can reside or can be used as a reselection candidate after a certain condition is met, and otherwise considers that the cell cannot reside or cannot be used as a reselection candidate cell. For example, when the "RSSI measured by the terminal" is smaller than the "RSSI threshold value", the cell is considered to be camped on or to be a candidate cell for reselection; or when the RSSI measured by the terminal is less than the RSSI threshold value + several offsets, the cell is considered to be camped on or to be a reselection candidate cell.
Preferably, the occupancy threshold represents a percentage of the number of samples higher than the first RSSI value, and a lower occupancy measured by the terminal represents a lower idle channel. The first RSSI value may be the total received signal power within a certain measurement bandwidth, or the total received signal power per RE may be averaged.
The method for using the channel occupancy rate threshold value and the first RSSI value by the terminal comprises the following steps: the terminal receives first threshold information in the broadcast message, the terminal measures RSSI and calculates channel occupancy according to the first RSSI, the terminal compares the calculated channel occupancy with a channel occupancy threshold value, the cell is considered to be a cell which can be resided or can be used as a reselection candidate after a certain condition is met, and otherwise, the cell is considered to be incapable of residing or cannot be used as a reselection candidate cell. For example, when the "occupancy of channel measured by the terminal" is smaller than the "occupancy threshold value", it is considered that the cell may reside or may be a reselection candidate cell.
Preferably, the threshold value of the channel idle rate represents a percentage of the number of samples lower than the second RSSI value, and a higher value of the channel idle rate measured by the terminal represents a more idle channel. The second RSSI value may be the total received signal power within a certain measurement bandwidth, or the total received signal power per RE may be averaged.
The terminal uses the channel idle rate threshold value and the second RSSI value: the terminal receives first threshold information in the broadcast message, the terminal measures RSSI and calculates the channel idle rate according to a second RSSI value, the terminal compares the calculated channel idle rate with a channel idle rate threshold value, the cell is considered to be a cell which can reside or can be used as a reselection candidate after a certain condition is met, and otherwise, the cell is considered to be incapable of residing or cannot be used as a reselection candidate cell. For example, when the "channel idle rate measured by the terminal" is greater than the "channel idle rate threshold value", the cell is considered to be camped on or to be a reselection candidate cell.
It should be noted that, in the above embodiment of the present invention, each threshold value in the first threshold information may be one or more, and if there is one threshold value, the terminal only receives one threshold; if there are more than one, the terminal may receive more than one threshold.
For example, different types of terminals correspond to different thresholds, for example, the thresholds corresponding to an internet of things terminal, an internet of vehicles terminal, and a common handheld terminal are different. The terminal selects a threshold matched with the type of the terminal to judge whether the terminal resides in the cell; as another example, different network slices (network slicing) correspond to different thresholds. The terminal selects the threshold of the network slice matched with the service requirement of the terminal to judge whether the terminal resides in the cell; for another example, different service levels correspond to different thresholds, for example, the terminal determines its own service level, and selects the threshold of the service level matching with its own service level to determine whether to camp in the cell.
Further, for the first solution, the method provided in the embodiment of the present invention further includes:
receiving load information of a cell on an unauthorized frequency band, which is sent by network side equipment; inter-cell interaction load information is required. For example, load information is exchanged between NR base stations through an Xn interface or through a core network.
Correspondingly, the selecting a camping cell from the cells on the unlicensed frequency band according to the channel occupation information and the first threshold information includes:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information, the first threshold information and the load information.
In short, the terminal in the idle state or the deactivated state may not only select the camping cell according to the cell signal strength, the cell signal quality, and the channel occupancy information, but also refer to the load information of the cell to comprehensively select the camping cell, thereby improving the accuracy of selecting the camping cell.
For example, the terminal selects a cell with the minimum RSSI value or the minimum channel occupancy rate or the maximum channel idle rate among cells with the same load as a camping cell; for another example, the terminal selects a cell with the lowest load from a plurality of cells with the smallest RSSI value or the lowest channel occupancy rate or the highest channel idle rate as the camping cell.
Further, for the first solution, the method provided in the embodiment of the present invention further includes:
receiving configuration information of RSSI measurement sent by network side equipment;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information (resource pool) for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of a sub-channel included in the resource pool (for indirectly determining the bandwidth of the resource pool), and a frequency domain position of the resource pool (for example, an offset from an anchor frequency, which may be a cell SSB center frequency point); -content requiring resource pool information interaction between cells, e.g. interaction between NR base stations over an Xn interface or interaction over a core network;
resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating resources to be measured in the resource pool;
correspondingly, the method for measuring the Received Signal Strength Indicator (RSSI) of the cell on the unauthorized frequency band and acquiring the channel occupation information on the unauthorized frequency band comprises the following steps:
and according to the configuration information of the RSSI measurement, the RSSI measurement is carried out, and the channel occupation information on the unauthorized frequency band is obtained.
In the embodiment of the present invention, the frequency domain resource and bandwidth measured by the RSSI in the configuration information of the RSSI measurement may specifically be any one of the following:
the frequency domain resource and bandwidth of the RSSI measurement are the same as the initial BWP (initial fractional bandwidth) of the cell; in this case, resource location and bandwidth of initial BWP interaction between cells are required, for example, NR base stations interact with each other through Xn interface or interact with each other through core network;
the frequency domain resource and bandwidth of the RSSI measurement are the same as the RMSI (remaining minimum system information) of the cell; in this case, the resource location and bandwidth of RMSI need to be interacted between cells, for example, NR base stations interact through an Xn interface or interact through a core network;
the frequency domain resource and bandwidth of RSSI measurement are the same as the carrier bandwidth of the cell; in this case, the carrier position and bandwidth of the inter-cell are needed, for example, the NR base stations interact with each other through an Xn interface or interact with each other through a core network.
It should be noted that, if the network side device does not configure the frequency domain resource and bandwidth of the RSSI measurement, the terminal adopts a default configuration, for example, the same as the synchronization signal block SSB of the cell.
In the embodiment of the present invention, the time domain resource of RSSI measurement in the configuration information of RSSI measurement includes: slots of RSSI measurements and/or symbols of RSSI measurements.
If the network side device does not configure the time domain resource for RSSI measurement, a default configuration is adopted, for example, the default configuration is the same as the SMTC (SSB measurement timing configuration) of the cell, or is fixed for 5 ms. In this case, time domain resources for RSSI measurement interaction between cells are required, for example, NR base stations interact with each other through an Xn interface or interact with each other through a core network.
In the embodiment of the present invention, the resource pool measurement configuration information of RSSI measurement in the configuration information of RSSI measurement is used to instruct the terminal to measure in the whole resource pool, or instruct the terminal to measure in each sub-channel in the resource pool. The content of the measurement configuration information of the resource pool needs to be interacted between the cells, for example, the NR base stations interact through an Xn interface or interact through a core network.
The method for using the resource pool information and the resource pool measurement configuration information by the terminal comprises the following steps: the terminal receives the system information, and the terminal measures the resources in the indicated resource pool, for example, measures the RSSI and/or the channel occupancy and/or the channel vacancy for the whole resource pool, or measures the RSSI and/or the channel occupancy and/or the channel vacancy for each sub-channel in the resource pool.
Further, for the first and second schemes, the method provided by the above embodiment of the present invention further includes:
receiving second threshold information for cell reselection, which is sent by a network side device, wherein the second threshold information includes: a range value of signal power; for example, a cell within this range value may be the highest ranked candidate cell, with the range value being in dB.
The method further comprises the following steps:
and performing cell reselection according to at least one of the second threshold information and the channel occupation information on the unlicensed frequency band and the cell measurement result on the unlicensed frequency band.
The method for the terminal to use the second threshold information comprises the following steps: the terminal receives the second threshold information, and the terminal performs cell measurement and judges whether the cell measurement result meets the cell residence condition; the terminal sorts the measurement results of all cells meeting the residence condition according to a certain rule, for example, the cell with the highest power is highest in ranking; and the terminal judges the cell meeting the second threshold value, for example, the difference between the power of the cell and the power of the highest-ranking cell is smaller than the second threshold value, and the cell is in accordance with the second threshold value. If a plurality of cells meet the second threshold, determining to reselect the cell according to a certain rule, for example, reselecting the cell according to channel quality occupation information on an unlicensed frequency band: reselecting a cell with the minimum RSSI value or the lowest channel occupancy rate or the highest channel idle rate, or reselecting a cell with the minimum load, or reselecting a cell with the minimum RSSI value or the lowest channel occupancy rate or the highest channel idle rate in cells with the same load, or reselecting a cell with the minimum RSSI value or the lowest channel occupancy rate or the lowest channel idle rate in cells with the same load; and if the cells meeting the second threshold value have the same channel occupation information, reselecting the cell with the highest ranking.
In summary, in the embodiments of the present invention, the terminal selects a more suitable cell for camping by the terminal in the idle state or the deactivated state by using the channel occupancy information as a reference factor in the process of selecting the camping cell in the unlicensed frequency band, so as to improve the accuracy of selecting the camping cell and improve the cell camping efficiency.
As shown in fig. 2, an embodiment of the present invention further provides a method for selecting a cell to camp on in an unlicensed frequency band, which is applied to a network side device, and includes:
transmitting channel occupation information on an unauthorized frequency band to a terminal; alternatively, the first and second electrodes may be,
sending first threshold information for cell camping to a terminal, wherein the first threshold information comprises at least one of the following information:
a Received Signal Strength Indication (RSSI) threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value used to estimate channel idle rate.
In the embodiment of the present invention, the cell on the unlicensed frequency band includes: a serving cell of the terminal and neighbor cells of the serving cell.
Specifically, the channel occupancy information may be the channel occupancy of one channel or multiple (sub) channels; the occupancy may be characterized by a percentage (e.g., a percentage of samples above a certain RSSI threshold), or the occupancy may be identified by several levels (e.g., 0-5, with 0 being the lowest level, indicating the channel is the least idle; 5 being the highest level, indicating the channel is the least busy). In this case, it is necessary to exchange channel occupancy information between cells, for example, NR base stations through an Xn interface or a core network.
In the above embodiment of the present invention, the channel occupancy information on the unlicensed frequency band may indicate the blind idle of the channel; in the embodiment of the invention, in the process of selecting the resident cell by the terminal, because the unauthorized frequency band is accessed in a competition mode, the blind idle of the channel is taken into consideration, namely the blind idle of the channel is taken as a reference factor for residing the cell, so that the terminal in an idle state or a deactivated state selects a more suitable cell for residing.
The embodiment of the invention provides at least two schemes, which are respectively as follows:
according to the first scheme, a terminal measures channel occupation information and selects a resident cell according to the measured channel occupation information;
scheme II: the network side equipment sends the channel occupation information, and the terminal selects the resident cell according to the channel occupation information sent by the network side equipment.
Preferably, the network side device broadcasts the first threshold information of the local cell and the neighboring cell in the system message, and the first threshold information is the camping threshold information.
The RSSI threshold value represents an RSSI value required by residing in the cell or residing in the frequency point; the RSSI threshold value may be a total received signal power within a certain measurement bandwidth, or an average of the total received signal power per RE (Resource Element).
The terminal uses the RSSI threshold value: the terminal receives first threshold information in the broadcast message, compares the RSSI measurement result with the RSSI threshold value, considers that the cell can reside or can be used as a reselection candidate after a certain condition is met, and otherwise considers that the cell cannot reside or cannot be used as a reselection candidate cell. For example, when the "RSSI measured by the terminal" is smaller than the "RSSI threshold value", the cell is considered to be camped on or to be a candidate cell for reselection; or when the RSSI measured by the terminal is less than the RSSI threshold value + several offsets, the cell is considered to be camped on or to be a reselection candidate cell.
Preferably, the occupancy threshold represents a percentage of the number of samples higher than the first RSSI value, and a lower occupancy measured by the terminal represents a lower idle channel. The first RSSI value may be the total received signal power within a certain measurement bandwidth, or the total received signal power per RE may be averaged.
The method for using the channel occupancy rate threshold value and the first RSSI value by the terminal comprises the following steps: the terminal receives first threshold information in the broadcast message, the terminal measures RSSI and calculates channel occupancy according to the first RSSI, the terminal compares the calculated channel occupancy with a channel occupancy threshold value, the cell is considered to be a cell which can be resided or can be used as a reselection candidate after a certain condition is met, and otherwise, the cell is considered to be incapable of residing or cannot be used as a reselection candidate cell. For example, when the "occupancy of channel measured by the terminal" is smaller than the "occupancy threshold value", it is considered that the cell may reside or may be a reselection candidate cell.
Preferably, the threshold value of the channel idle rate represents a percentage of the number of samples lower than the second RSSI value, and a higher value of the channel idle rate measured by the terminal represents a more idle channel. The second RSSI value may be the total received signal power within a certain measurement bandwidth, or the total received signal power per RE may be averaged.
The terminal uses the channel idle rate threshold value and the second RSSI value: the terminal receives first threshold information in the broadcast message, the terminal measures RSSI and calculates the channel idle rate according to a second RSSI value, the terminal compares the calculated channel idle rate with a channel idle rate threshold value, the cell is considered to be a cell which can reside or can be used as a reselection candidate after a certain condition is met, and otherwise, the cell is considered to be incapable of residing or cannot be used as a reselection candidate cell. For example, when the "channel idle rate measured by the terminal" is greater than the "channel idle rate threshold value", the cell is considered to be camped on or to be a reselection candidate cell.
It should be noted that, in the above embodiment of the present invention, each threshold value in the first threshold information may be one or more, and if there is one threshold value, the terminal only receives one threshold; if there are more than one, the terminal may receive more than one threshold.
For example, different types of terminals correspond to different thresholds, for example, the thresholds corresponding to an internet of things terminal, an internet of vehicles terminal, and a common handheld terminal are different. The terminal selects a threshold matched with the type of the terminal to judge whether the terminal resides in the cell; as another example, different network slices (network slicing) correspond to different thresholds. The terminal selects the threshold of the network slice matched with the service requirement of the terminal to judge whether the terminal resides in the cell; for another example, different service levels correspond to different thresholds, for example, the terminal determines its own service level, and selects the threshold of the service level matching with its own service level to determine whether to camp in the cell.
Further, for the first solution, the method provided in the embodiment of the present invention further includes:
sending load information of a cell on an unauthorized frequency band to a terminal; inter-cell interaction load information is required. For example, the NR base stations exchange load information through an Xn interface or exchange through a core network.
In short, the terminal in the idle state or the deactivated state may not only select the camping cell according to the cell signal strength, the cell signal quality, and the channel occupancy information, but also refer to the cell load information, thereby improving the accuracy of the method for determining the camping cell.
For example, the terminal selects a cell with the minimum RSSI value or the minimum channel occupancy rate or the maximum channel idle rate among cells with the same load as a camping cell; for another example, the terminal selects a cell with the lowest load from a plurality of cells with the smallest RSSI value or the lowest channel occupancy rate or the highest channel idle rate as the camping cell.
Further, for the first solution, the method provided in the embodiment of the present invention further includes:
sending configuration information of RSSI measurement to a terminal;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
and resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating the resource to be measured in the resource pool.
In the embodiment of the present invention, the frequency domain resource and bandwidth measured by the RSSI in the configuration information of the RSSI measurement may specifically be any one of the following:
the frequency domain resource and bandwidth of the RSSI measurement are the same as the initial BWP (initial fractional bandwidth) of the cell; in this case, resource location and bandwidth of initial BWP interaction between cells are required, for example, NR base stations interact with each other through Xn interface or interact with each other through core network;
the frequency domain resource and bandwidth of the RSSI measurement are the same as the RMSI (remaining minimum system information) of the cell; in this case, the resource location and bandwidth of RMSI need to be interacted between cells, for example, NR base stations interact through an Xn interface or interact through a core network;
the frequency domain resource and bandwidth of RSSI measurement are the same as the carrier bandwidth of the cell; in this case, the carrier position and bandwidth of the inter-cell are needed, for example, the NR base stations interact with each other through an Xn interface or interact with each other through a core network.
It should be noted that, if the network side device does not configure the frequency domain resource and bandwidth of the RSSI measurement, the terminal adopts a default configuration, for example, the same as the synchronization signal block SSB of the cell.
In the embodiment of the present invention, the time domain resource of RSSI measurement in the configuration information of RSSI measurement includes: slots of RSSI measurements and/or symbols of RSSI measurements.
If the network side device does not configure the time domain resource for RSSI measurement, a default configuration is adopted, for example, the default configuration is the same as the SMTC (SSB measurement timing configuration) of the cell, or is fixed for 5 ms. In this case, time domain resources for RSSI measurement interaction between cells are required, for example, NR base stations interact with each other through an Xn interface or interact with each other through a core network.
In the embodiment of the present invention, the resource pool measurement configuration information of RSSI measurement in the configuration information of RSSI measurement is used to instruct the terminal to measure in the whole resource pool, or instruct the terminal to measure in each sub-channel in the resource pool. The content of the measurement configuration information of the resource pool needs to be interacted between the cells, for example, the NR base stations interact through an Xn interface or interact through a core network.
The method for using the resource pool information and the resource pool measurement configuration information by the terminal comprises the following steps: the terminal receives the system information, and the terminal measures the resources in the indicated resource pool, for example, measures the RSSI and/or the channel occupancy and/or the channel vacancy for the whole resource pool, or measures the RSSI and/or the channel occupancy and/or the channel vacancy for each sub-channel in the resource pool.
Further, for the first and second schemes, the method provided by the above embodiment of the present invention further includes:
sending second threshold information for cell reselection to a terminal, wherein the second threshold information comprises: range values of signal power. For example, indicating that the cell within this range value may be the highest ranked candidate cell, the range value being in dB.
In summary, in the embodiments of the present invention, the terminal selects a more suitable cell for camping by the terminal in the idle state or the deactivated state by using the channel occupancy information as a reference factor in the process of selecting the camping cell in the unlicensed frequency band, so as to improve the accuracy of selecting the camping cell and improve the cell camping efficiency.
As shown in fig. 3, an embodiment of the present invention further provides a terminal, which includes a processor 300 and a transceiver 310, and the terminal further includes a user interface 320, where the processor 300 is configured to perform the following processes:
acquiring channel occupation information on an unauthorized frequency band;
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information.
Optionally, in the foregoing embodiment of the present invention, the processor 300 is further configured to:
the method comprises the steps of measuring the Received Signal Strength Indication (RSSI) of a cell on an unauthorized frequency band, and acquiring channel occupation information on the unauthorized frequency band, wherein the channel occupation information comprises the following steps: at least one of RSSI, channel occupancy, and channel idleness.
Optionally, in the foregoing embodiment of the present invention, the transceiver 300 is configured to:
receiving channel occupation information on an unlicensed frequency band sent by a network side device, wherein the channel occupation information comprises: at least one of RSSI, channel occupancy, and channel idleness.
Optionally, in the foregoing embodiment of the present invention, the transceiver 310 is further configured to:
receiving first threshold information for cell camping sent by a network side device, where the first threshold information includes at least one of the following information:
an RSSI threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value for evaluating the channel idle rate;
the processor is further configured to:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information and the first threshold information.
Optionally, in the foregoing embodiment of the present invention, the transceiver 310 is further configured to:
receiving load information of a cell on an unauthorized frequency band, which is sent by network side equipment;
the processor is further configured to:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information, the first threshold information and the load information.
Optionally, in the foregoing embodiment of the present invention, the transceiver 310 is further configured to:
receiving configuration information of RSSI measurement sent by network side equipment;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating resources to be measured in the resource pool;
the processor is further configured to:
and measuring according to the configuration information of the RSSI measurement, and acquiring the channel occupation information on the unauthorized frequency band.
Optionally, in the foregoing embodiment of the present invention, the transceiver 310 is further configured to:
receiving second threshold information for cell reselection, which is sent by a network side device, wherein the second threshold information includes: a range value of signal power;
the processor is further configured to:
and performing cell reselection according to at least one of the second threshold information and the channel occupation information on the unlicensed frequency band and the cell measurement result on the unlicensed frequency band.
In summary, in the embodiments of the present invention, the terminal selects a more suitable cell for camping by the terminal in the idle state or the deactivated state by using the channel occupancy information as a reference factor in the process of selecting the camping cell in the unlicensed frequency band, so as to improve the accuracy of selecting the camping cell and improve the cell camping efficiency.
It should be noted that the terminal provided in the embodiment of the present invention is a terminal capable of executing the method for selecting a cell to camp on in an unlicensed frequency band, and all embodiments of selecting a cell to camp on in an unlicensed frequency band are applicable to the terminal, and can achieve the same or similar beneficial effects.
As shown in fig. 4, an embodiment of the present invention further provides an apparatus for selecting a cell to camp on in an unlicensed frequency band, which is applied to a terminal, and includes:
an occupation determining module 41, configured to obtain channel occupation information on an unlicensed frequency band;
a cell selecting module 42, configured to select a camping cell from cells on the unlicensed frequency band according to the channel occupancy information.
Optionally, in the above embodiment of the present invention, the cell selection module includes:
the first measurement submodule is used for judging whether the cell measurement result on the unauthorized frequency band meets the cell residence condition;
and the first selection submodule is used for selecting the resident cell according to the channel occupation information aiming at the cell meeting the cell resident condition.
Optionally, in the foregoing embodiment of the present invention, the occupancy determining module includes:
a second measurement submodule, configured to perform RSSI measurement on a cell in an unlicensed frequency band, and acquire channel occupancy information in the unlicensed frequency band, where the channel occupancy information includes: at least one of RSSI, channel occupancy, and channel idleness.
Optionally, in the foregoing embodiment of the present invention, the occupancy determining module includes:
the first receiving submodule is configured to receive channel occupancy information on an unlicensed frequency band, where the channel occupancy information includes: at least one of RSSI, channel occupancy, and channel idleness.
Optionally, in the above embodiment of the present invention, the apparatus further includes:
a second receiving module, configured to receive first threshold information for cell camping sent by a network side device, where the first threshold information includes at least one of the following information:
an RSSI threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value for evaluating the channel idle rate;
the cell selection module comprises:
and the second selection submodule is used for selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information and the first threshold information.
Optionally, in the above embodiment of the present invention, the apparatus further includes:
a third receiving module, configured to receive load information of a cell in an unlicensed frequency band, where the load information is sent by a network side device;
the second selection submodule is further configured to:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information, the first threshold information and the load information.
Optionally, in the above embodiment of the present invention, the apparatus further includes:
the fourth receiving submodule is used for receiving configuration information of RSSI measurement sent by the network side equipment;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating resources to be measured in the resource pool;
the second measurement submodule is further to:
and measuring according to the configuration information of the RSSI measurement, and acquiring the channel occupation information on the unauthorized frequency band.
Optionally, in the above embodiment of the present invention, the apparatus further includes:
receiving second threshold information for cell reselection, which is sent by a network side device, wherein the second threshold information includes: a range value of signal power;
the method further comprises the following steps:
and the fifth receiving module is used for performing cell reselection according to at least one of the second threshold information and the channel occupation information on the unlicensed frequency band and the cell measurement result on the unlicensed frequency band.
In summary, in the embodiments of the present invention, the terminal selects a more suitable cell for camping by the terminal in the idle state or the deactivated state by using the channel occupancy information as a reference factor in the process of selecting the camping cell in the unlicensed frequency band, so as to improve the accuracy of selecting the camping cell and improve the cell camping efficiency.
It should be noted that the apparatus for selecting a cell to camp on an unlicensed frequency band according to the embodiments of the present invention is an apparatus capable of performing the method for selecting a cell to camp on an unlicensed frequency band, and all embodiments of the method for selecting a cell to camp on an unlicensed frequency band are applicable to the apparatus and can achieve the same or similar beneficial effects.
As shown in fig. 5, an embodiment of the present invention further provides a network side device, which includes a processor 500 and a transceiver 510, where the processor 500 is configured to control the transceiver 510 to perform the following processes:
transmitting channel occupation information on an unauthorized frequency band to a terminal; alternatively, the first and second electrodes may be,
sending first threshold information for cell camping to a terminal, wherein the first threshold information comprises at least one of the following information:
a Received Signal Strength Indication (RSSI) threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value used to estimate channel idle rate.
Optionally, in the foregoing embodiment of the present invention, the transceiver 510 is further configured to:
and sending the load information of the cell on the unlicensed frequency band to the terminal.
Optionally, in the foregoing embodiment of the present invention, the transceiver 510 is further configured to:
sending configuration information of RSSI measurement to a terminal;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
and resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating the resource to be measured in the resource pool.
Optionally, in the foregoing embodiment of the present invention, the transceiver 510 is further configured to:
sending second threshold information to a terminal, wherein the second threshold information comprises: range values of signal power.
In summary, in the embodiments of the present invention, the terminal selects a more suitable cell for camping by the terminal in the idle state or the deactivated state by using the channel occupancy information as a reference factor in the process of selecting the camping cell in the unlicensed frequency band, so as to improve the accuracy of selecting the camping cell and improve the cell camping efficiency.
It should be noted that the network side device provided in the embodiment of the present invention is a network side device capable of executing the method for selecting a cell to camp on in an unlicensed frequency band, and all embodiments of the method for selecting a cell to camp on in an unlicensed frequency band are applicable to the network side device, and can achieve the same or similar beneficial effects.
As shown in fig. 6, an embodiment of the present invention further provides a device for selecting a cell in an unlicensed frequency band, which is applied to a network side device, and includes:
a sending module 61, configured to send channel occupancy information on an unlicensed frequency band to a terminal; or, the apparatus is configured to send first threshold information for cell camping to a terminal, where the first threshold information includes at least one of the following information:
a Received Signal Strength Indication (RSSI) threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value used to estimate channel idle rate.
Optionally, in the above embodiment of the present invention, the apparatus further includes:
the first sending module is used for sending load information of a cell on an unauthorized frequency band to a terminal.
Optionally, in the above embodiment of the present invention, the apparatus further includes:
the second sending module is used for sending configuration information of RSSI measurement to the terminal;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
and resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating the resource to be measured in the resource pool.
Optionally, in the above embodiment of the present invention, the apparatus further includes:
a third sending module, configured to send second threshold information to the terminal, where the second threshold information includes: range values of signal power.
In summary, in the embodiments of the present invention, the terminal selects a more suitable cell for camping by the terminal in the idle state or the deactivated state by using the channel occupancy information as a reference factor in the process of selecting the camping cell in the unlicensed frequency band, so as to improve the accuracy of selecting the camping cell and improve the cell camping efficiency.
It should be noted that the cell selection device of the unlicensed frequency band provided in the embodiment of the present invention is a device capable of performing cell selection of the unlicensed frequency band, and all embodiments of the cell selection method of the unlicensed frequency band are applicable to the device and can achieve the same or similar beneficial effects.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements each process in the above-mentioned cell selection method for an unlicensed frequency band, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks.
These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
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 (25)

1. A method for selecting a resident cell in an unlicensed frequency band is applied to a terminal, and is characterized by comprising the following steps:
acquiring channel occupation information on an unauthorized frequency band;
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information.
2. The method of claim 1, wherein the obtaining of the channel occupancy information on the unlicensed frequency band comprises:
the method comprises the steps of measuring the Received Signal Strength Indication (RSSI) of a cell on an unauthorized frequency band, and acquiring channel occupation information on the unauthorized frequency band, wherein the channel occupation information comprises the following steps: at least one of RSSI, channel occupancy, and channel idleness.
3. The method of claim 1, wherein the obtaining of the channel occupancy information on the unlicensed frequency band comprises:
receiving channel occupation information on an unlicensed frequency band sent by a network side device, wherein the channel occupation information comprises: at least one of RSSI, channel occupancy, and channel idleness.
4. The method of claim 2, further comprising:
receiving first threshold information for cell camping sent by a network side device, where the first threshold information includes at least one of the following information:
an RSSI threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value for evaluating the channel idle rate;
selecting a resident cell from cells on an unlicensed frequency band according to the channel occupation information, including:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information and the first threshold information.
5. The method of claim 4, further comprising:
receiving load information of a cell on an unauthorized frequency band, which is sent by network side equipment;
selecting a resident cell from cells on an unlicensed frequency band according to the channel occupation information and the first threshold information, including:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information, the first threshold information and the load information.
6. The method of claim 2, further comprising:
receiving configuration information of RSSI measurement sent by network side equipment;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating resources to be measured in the resource pool;
the measuring the Received Signal Strength Indicator (RSSI) of the cell on the unauthorized frequency band to acquire the channel occupation information on the unauthorized frequency band comprises the following steps:
and measuring according to the configuration information of the RSSI measurement, and acquiring the channel occupation information on the unauthorized frequency band.
7. A method according to claim 1, 2 or 3, characterized in that the method further comprises:
receiving second threshold information sent by a network side device, wherein the second threshold information comprises: a range value of signal power;
the method further comprises the following steps:
and performing cell reselection according to at least one of the second threshold information and the channel occupation information on the unlicensed frequency band and the cell measurement result on the unlicensed frequency band.
8. A method for selecting a resident cell in an unlicensed frequency band is applied to network side equipment, and is characterized by comprising the following steps:
transmitting channel occupation information on an unauthorized frequency band to a terminal; alternatively, the first and second electrodes may be,
sending first threshold information for cell camping to a terminal, wherein the first threshold information comprises at least one of the following information:
a Received Signal Strength Indication (RSSI) threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value used to estimate channel idle rate.
9. The method of claim 8, further comprising:
and sending the load information of the cell on the unlicensed frequency band to the terminal.
10. The method of claim 8, further comprising:
sending configuration information of RSSI measurement to a terminal;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
and resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating the resource to be measured in the resource pool.
11. The method of claim 8, further comprising:
sending second threshold information to a terminal, wherein the second threshold information comprises: range values of signal power.
12. A terminal comprising a processor and a transceiver, wherein the processor is configured to perform the following:
acquiring channel occupation information on an unauthorized frequency band;
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information.
13. The terminal of claim 12, wherein the processor is further configured to:
the method comprises the steps of measuring the Received Signal Strength Indication (RSSI) of a cell on an unauthorized frequency band, and acquiring channel occupation information on the unauthorized frequency band, wherein the channel occupation information comprises the following steps: at least one of RSSI, channel occupancy, and channel idleness.
14. The terminal of claim 12, wherein the transceiver is configured to:
receiving channel occupation information on an unlicensed frequency band sent by a network side device, wherein the channel occupation information comprises: at least one of RSSI, channel occupancy, and channel idleness.
15. The terminal of claim 13, wherein the transceiver is further configured to:
receiving first threshold information for cell camping sent by a network side device, where the first threshold information includes at least one of the following information:
an RSSI threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value for evaluating the channel idle rate;
the processor is further configured to:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information and the first threshold information.
16. The terminal of claim 15, wherein the transceiver is further configured to:
receiving load information of a cell on an unauthorized frequency band, which is sent by network side equipment;
the processor is further configured to:
and selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information, the first threshold information and the load information.
17. The terminal of claim 13, wherein the transceiver is further configured to:
receiving configuration information of RSSI measurement sent by network side equipment;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating resources to be measured in the resource pool;
the processor is further configured to:
and measuring according to the configuration information of the RSSI measurement, and acquiring the channel occupation information on the unauthorized frequency band.
18. The terminal according to claim 12, 13 or 14, wherein the transceiver is further configured to:
receiving second threshold information for cell reselection, which is sent by a network side device, wherein the second threshold information includes: a range value of signal power;
the processor is further configured to:
and performing cell reselection according to at least one of the second threshold information and the channel occupation information on the unlicensed frequency band and the cell measurement result on the unlicensed frequency band.
19. An apparatus for selecting a cell to camp on in an unlicensed frequency band, applied to a terminal, comprising:
an occupation determining module, configured to obtain channel occupation information on an unlicensed frequency band;
and the cell selection module is used for selecting a resident cell from the cells on the unauthorized frequency band according to the channel occupation information.
20. A network side device, comprising a processor and a transceiver, wherein the processor is configured to control the transceiver to perform the following processes:
transmitting channel occupation information on an unauthorized frequency band to a terminal; alternatively, the first and second electrodes may be,
sending first threshold information for cell camping to a terminal, wherein the first threshold information comprises at least one of the following information:
a Received Signal Strength Indication (RSSI) threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value used to estimate channel idle rate.
21. The network-side device of claim 20, wherein the transceiver is further configured to:
and sending the load information of the cell on the unlicensed frequency band to the terminal.
22. The network-side device of claim 20, wherein the transceiver is further configured to:
sending configuration information of RSSI measurement to a terminal;
the configuration information of the RSSI measurement comprises at least one of the following information:
frequency domain resources and/or bandwidth of the RRSI measurements;
time domain resources for RSSI measurements;
resource pool information for RSSI measurements, the resource pool information comprising: at least one of resource pool identification information, a bandwidth of the resource pool, a number of sub-channels included in the resource pool, a bandwidth of sub-channels included in the resource pool, and a frequency domain position of the resource pool;
and resource pool measurement configuration information of RSSI measurement, wherein the resource pool measurement configuration information is used for indicating the resource to be measured in the resource pool.
23. The network-side device of claim 20, wherein the transceiver is further configured to:
sending second threshold information to a terminal, wherein the second threshold information comprises: range values of signal power.
24. An apparatus for selecting a cell to camp on in an unlicensed frequency band, applied to a network side device, includes:
the transmitting module is used for transmitting channel occupation information on the unauthorized frequency band to the terminal; or, the apparatus is configured to send first threshold information for cell camping to a terminal, where the first threshold information includes at least one of the following information:
a Received Signal Strength Indication (RSSI) threshold value;
a channel occupancy threshold value and a first RSSI value for estimating channel occupancy;
a channel idle rate threshold value and a second RSSI value used to estimate channel idle rate.
25. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, performs the steps of the method for selecting a cell to camp on in an unlicensed frequency band as claimed in any one of claims 1 to 7; alternatively, the program is executed by a processor to implement the steps in the method for selecting a camping cell in an unlicensed frequency band according to any one of claims 8 to 11.
CN201910026933.0A 2019-01-11 2019-01-11 Method, terminal and network equipment for selecting resident cell in unlicensed frequency band Active CN111436092B (en)

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