CN108738141B - Method for configuring physical random access channel parameters, network side equipment and terminal - Google Patents
Method for configuring physical random access channel parameters, network side equipment and terminal Download PDFInfo
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- CN108738141B CN108738141B CN201710265631.XA CN201710265631A CN108738141B CN 108738141 B CN108738141 B CN 108738141B CN 201710265631 A CN201710265631 A CN 201710265631A CN 108738141 B CN108738141 B CN 108738141B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
The embodiment of the invention provides a configuration method of physical random access channel parameters, network side equipment and a terminal; the method of the network side comprises the following steps: and sending physical random access channel parameter list selection threshold list information, physical random access channel parameter list selection threshold information and physical random access channel parameter information. The terminal side method comprises the following steps: and receiving physical random access channel parameter list selection threshold information, physical random access channel parameter list selection threshold information and physical random access channel parameter information sent by a network side. The scheme of the invention can support the configuration of reasonable physical random access channel resource configuration information for terminals with different power grades when the terminals have a plurality of power grades, and meet the normal receiving of the random access request of the terminals under different network coverage.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for configuring physical random access channel parameters, a network side device, and a terminal.
Background
In order to support diversification of terminal types and application scenarios, two kinds of power and the like, namely power class 3(23dBm) and power class 5(20dBm), are defined for an eMTC terminal in the 3GPP specification; three power classes, power class 3(23dBm), power class 5(20dBm), and power class 6(14dBm), are defined for NB-IoT terminals. Different terminal power levels correspond to different terminal maximum transmit powers. Reasonable physical random access channel parameter information needs to be configured for eMTC terminals or NB-IoT terminals with various power levels under different coverage conditions, so that the terminal can select proper physical random access channel parameters according to the power level of the terminal and successfully initiate a random access request.
Disclosure of Invention
The invention provides a method for configuring physical random access channel parameters, network side equipment and a terminal. The method can effectively support the configuration of reasonable physical random access channel resource configuration information for the terminals with different power levels when the terminals have a plurality of power levels, and meet the normal reception of the random access requests of the terminals under different network coverage.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
a method for configuring physical random access channel parameters comprises the following steps:
and the network side sends physical random access channel parameter list selection threshold information, physical random access channel parameter list information and physical random access channel parameter information.
The method for configuring the physical random access channel parameters further comprises the following steps:
and the network side sends the information of the physical random access channel parameter list selection threshold information list.
The physical random access channel parameter list selection threshold list information is used for indicating a terminal to read corresponding physical random access channel parameter list selection threshold information.
The physical random access channel parameter list selection threshold list information is used for indicating a terminal to read physical random access channel parameter list selection threshold information corresponding to the power grade in the physical random access channel parameter list selection threshold list information according to the power grade of the terminal.
Wherein the physical random access channel parameter list selection threshold information includes a set of physical random access channel parameter list selection threshold values, and the number of the physical random access channel parameter list selection threshold values is determined by the number of the coverage enhancement levels.
Wherein the number of the physical random access channel parameter list selection threshold information included in the physical random access channel parameter list selection threshold list information is determined by the number of terminal power classes.
The corresponding relation between the physical random access channel parameter list selection threshold list information and the terminal power level is as follows:
the physical random access channel parameter list selection threshold information contained in the physical random access channel parameter list selection threshold information corresponds to the terminal power level.
Wherein, the physical random access channel parameter list selection threshold information included in the physical random access channel parameter list selection threshold list information sequence corresponds to the terminal power level, and specifically includes:
the Nth physical random access channel parameter list selection threshold information in the physical random access channel parameter list selection threshold list information corresponds to the power level M of the terminal;
reading Nth physical random access channel parameter list selection threshold information in the physical random access channel parameter list selection threshold list information by a terminal with the power level of M;
wherein, the value ranges of N and M are both {1 … maxPower-Class }, and the maxPower-Class is the number of terminal power levels.
Wherein the number of terminal power levels is: a preset number of terminal power classes, or a maximum number of terminal power classes defined in a standard, or a number of terminal power classes actually used by the terminal.
The physical random access channel parameter list selection threshold information is used for indicating a terminal to determine a coverage enhancement level of the terminal according to a measurement value of receiving power of a reference signal or a synchronous signal on a network side and a physical random access channel parameter list selection threshold value contained in the physical random access channel parameter list selection threshold information.
The physical random access channel parameter list information is used for indicating a terminal to read physical random access channel parameter information corresponding to the coverage enhancement grade in the physical random access channel parameter list information according to the determined coverage enhancement grade.
The threshold value is determined by the network side according to the maximum coupling loss between the base station and the terminal allowed by different coverage enhancement levels and the transmission power of the reference signal or the synchronous signal of the network side.
Wherein the threshold value is equal to PRStx-MCLN+Poffset；
Wherein, MCLNMaximum coupling loss value, P, between base station and terminal allowed for network side coverage enhancement level NRStxFor the transmission power value, P, of the network-side reference signal or synchronization signaloffsetA configurable threshold margin.
Wherein, the number of the physical random access channel parameter information is a preset value;
the preset value is equal to the number of coverage enhancement levels;
or, the preset value is equal to the number of coverage enhancement grades multiplied by the number of terminal power grades;
or, the preset value is equal to the number of the physical random access channel parameter list selection threshold values contained in the physical random access channel parameter list selection threshold information plus 1.
Wherein the physical random access channel parameter information includes: the frequency offset sent by the physical random access channel, the starting subframe number sent by the physical random access channel, the maximum trial number of random access requests and/or the pilot code repetition number of the physical random access channel.
The maximum trial times of the random access request and the repetition times of the pilot code of the physical random access channel are determined by the network side according to the coverage enhancement grade of the terminal, or determined by the network side according to the power grade of the terminal and the coverage enhancement grade of the terminal.
The embodiment of the invention also provides a method for selecting the parameter information of the physical random access channel, which comprises the following steps:
the terminal receives the physical random access channel parameter list selection threshold information, the physical random access channel parameter list information and the physical random access channel parameter information sent by the network side.
The method for selecting the physical random access channel parameter information further comprises the following steps:
and the terminal receives the physical random access channel parameter list selection threshold list information sent by the network side.
The method for selecting the physical random access channel parameter information further comprises the following steps:
and the terminal reads the physical random access channel parameter list selection threshold information corresponding to the power grade in the physical random access channel parameter list selection threshold list information according to the power grade of the terminal.
The method for selecting the physical random access channel parameter information further comprises the following steps:
and the terminal determines the coverage enhancement grade of the terminal according to the measured value of the receiving power of the reference signal or the synchronous signal at the network side and the read physical random access channel parameter list selection threshold information.
The method for selecting the physical random access channel parameter information further comprises the following steps:
and the terminal reads a group of physical random access channel parameter list selection threshold values contained in the physical random access channel parameter list selection threshold information, compares the measured value of the receiving power of the reference signal or the synchronous signal at the network side with the physical random access channel parameter list selection threshold values, and determines the coverage enhancement level of the terminal.
The method for selecting the physical random access channel parameter information further comprises the following steps:
if the measured value of the receiving power of the reference signal or the synchronous signal at the network side by the terminal is smaller than the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement level N in the physical random access channel parameter list selection threshold information, the terminal considers that the terminal is in the coverage enhancement level N;
the value range of N is {1 … maxCE-Level }, and maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value.
The method for selecting the physical random access channel parameter information further comprises the following steps:
if the measured value of the receiving power of the reference signal or the synchronous signal at the network side by the terminal is larger than the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement grade M in the physical random access channel parameter list selection threshold information, the terminal considers that the terminal is in the coverage enhancement grade M;
the value range of M is {1 … maxCE-Level }, and maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value.
The method for selecting the physical random access channel parameter information further comprises the following steps:
and the terminal determines the coverage enhancement grade of the terminal according to the power value corresponding to the reference power grade, the power value corresponding to the power grade of the terminal and the threshold information selected by the physical random access channel parameter list.
The method for selecting the physical random access channel parameter information further comprises the following steps:
and the terminal determines the coverage enhancement grade of the terminal according to the maximum transmitting power value of the terminal in the cell, the power value corresponding to the power grade of the terminal and the threshold information selected by the physical random access channel parameter list.
If the measured value of the receiving power of the reference signal or the synchronous signal at the network side by the terminal is smaller than the sum of the selection threshold value of the physical random access channel parameter list corresponding to the coverage enhancement level N in the selection threshold information of the physical random access channel parameter list and the power compensation value, the terminal considers that the terminal is in the coverage enhancement level N;
the value range of N is {1 … maxCE-Level }, and maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value.
If the difference value between the measured value of the receiving power of the reference signal or the synchronous signal at the network side and the power compensation value is smaller than the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement level N in the physical random access channel parameter list selection threshold information, the terminal considers that the terminal is in the coverage enhancement level N;
the value range of N is {1 … maxCE-Level }, and maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value.
If the measured value of the receiving power of the reference signal or the synchronous signal at the network side by the terminal is larger than the sum of the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement level N in the physical random access channel parameter list selection threshold information and the power compensation value, the terminal considers that the terminal is in the coverage enhancement level N;
the value range of N is {1 … maxCE-Level }, and maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value.
If the difference value between the measured value of the receiving power of the reference signal or the synchronous signal at the network side and the power compensation value is larger than the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement level N in the physical random access channel parameter list selection threshold information, the terminal considers that the terminal is in the coverage enhancement level N;
the value range of N is {1 … maxCE-Level }, and maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value.
The method for selecting the physical random access channel parameter information further comprises the following steps:
the power compensation value is equal to the difference value between the power value corresponding to the reference power level and the power value corresponding to the power level of the terminal;
or the power compensation value is equal to the difference between the maximum transmitting power value of the terminal in the cell and the power value corresponding to the power level of the terminal.
The method for selecting the physical random access channel parameter information further comprises the following steps:
and the terminal reads the physical random access channel parameter information corresponding to the coverage enhancement grade in the physical random access channel parameter list information according to the determined coverage enhancement grade.
The method for selecting the physical random access channel parameter information further comprises the following steps:
and the terminal initiates a random access request according to the physical random access channel parameter information.
An embodiment of the present invention further provides a network side device, including:
a sending module, configured to send physical random access channel parameter list selection threshold information, physical random access channel parameter list information, and physical random access channel parameter information; or for sending physical random access channel parameter list selection threshold information, physical random access channel parameter list information, and physical random access channel parameter information.
An embodiment of the present invention further provides a terminal, including:
the receiving module is used for receiving physical random access channel parameter list selection threshold information, physical random access channel parameter list information and physical random access channel parameter information sent by a network side; or the physical random access channel parameter list selection threshold information, the physical random access channel parameter list information and the physical random access channel parameter information are received.
The scheme of the invention at least comprises the following beneficial effects:
the method can effectively support the configuration of reasonable physical random access channel resource configuration information for the terminals with different power levels when the terminals have a plurality of power levels, and meet the normal reception of the random access requests of the terminals under different network coverage.
Drawings
Fig. 1 is a flowchart illustrating a method for selecting physical random access channel parameter information on a terminal side according to a third embodiment of 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 disclosure to those skilled in the art.
First embodiment
A first embodiment of the present invention provides a method for configuring physical random access channel parameters, including:
and the network side sends physical random access channel parameter list selection threshold information, physical random access channel parameter information and physical random access channel parameter list selection threshold list information.
The physical random access channel parameter list selection threshold list information is used for indicating a terminal to read corresponding physical random access channel parameter list selection threshold information.
Further, the physical random access channel parameter list selection threshold list information is also used for instructing the terminal to read the physical random access channel parameter list selection threshold information corresponding to the power class in the physical random access channel parameter list selection threshold list information according to the power class of the terminal.
In the first embodiment, the physical random access channel parameter list selection threshold information is used to instruct the terminal to determine the coverage enhancement level of the terminal according to the measured value of the received power of the reference signal or the synchronization signal on the network side and the threshold value included in the read physical random access channel parameter list selection threshold information;
and the physical random access channel parameter information is used for indicating the terminal to read the resource allocation of the physical random access channel corresponding to the determined coverage enhancement grade according to the determined coverage enhancement grade.
In this first embodiment, the physical random access channel parameter list selection threshold list information is a sequence, the number of first information units included in the sequence is determined by the number of terminal power classes, and the first information units are the physical random access channel parameter list selection threshold information.
The corresponding relation between the physical random access channel parameter list selection threshold list information and the terminal power level is as follows:
and the first information units contained in the physical random access channel parameter list selection threshold list information sequence correspond to the power levels of the terminals one by one.
The method for selecting the power level of the terminal according to the physical random access channel parameter list comprises the following steps:
the Nth first information unit in the physical random access channel parameter list selection threshold list information sequence corresponds to the terminal power level M;
a terminal with the power level of M reads the information corresponding to the Nth first information unit of the physical random access channel parameter list selection threshold list information sequence;
wherein, the value ranges of N and M are both {1 … maxPower-Class }, and maxPower-Class is the number of preset terminal power classes or the number of terminal power classes actually used by the terminal.
In this first embodiment, the physical random access channel parameter list selection threshold list information is a sequence, the first information unit included in the sequence is a sequence, the first information unit sequence includes a set of threshold values, and the number of the threshold values is determined by the number of coverage enhancement levels.
In this first embodiment, the first corresponding manner is that the number of the parameter information of the physical random access channel is equal to the number of coverage enhancement levels, or the first corresponding manner is that the number of the parameter information of the physical random access channel is equal to the number of the coverage enhancement levels supported by the network side at the maximum times the number of the power levels of the terminal, where the second corresponding manner is that the network side device defines corresponding physical random access channel parameters for terminals with different power levels under different coverage enhancement levels.
For example, assuming that the number of power levels of the terminal is 3 and the number of coverage enhancement levels is 3, a first corresponding manner is adopted, and the number of the parameter information of the physical random access channel is 3; and in a second corresponding mode, the number of the physical random access channel parameter information is 9.
When the first corresponding manner is adopted, the corresponding relationship between the physical random access channel parameter information and the coverage enhancement level includes, but is not limited to, the following manners:
the physical random access channel parameter information I corresponds to the coverage enhancement grade I;
the physical random access channel parameter information II corresponds to the coverage enhancement grade II;
and the physical random access channel parameter information III corresponds to the coverage enhancement grade III.
When the second middle correspondence mode is adopted, the correspondence relationship between the physical random access channel parameter information and the terminal power level and the network coverage enhancement level includes, but is not limited to, the following modes:
the first method is as follows:
the second method comprises the following steps:
the third method comprises the following steps:
the method is as follows:
the embodiment of the invention can effectively support the configuration of reasonable physical random access channel resource configuration information for the terminals with different power grades when the terminals have a plurality of power grades, and meet the normal receiving of the random access requests of the terminals under different network coverage.
Second embodiment
The second embodiment of the present invention further provides a method for configuring physical random access channel parameters, including:
and the network side sends physical random access channel parameter list selection threshold information and physical random access channel parameter information.
In this second embodiment, the physical random access channel parameter list selection threshold information is a sequence, where the sequence includes a set of threshold values, and the number of the threshold values is determined by the number of coverage enhancement levels.
In all the above embodiments, the threshold value is determined by the maximum coupling loss between the base station and the terminal allowed by the network side according to different coverage enhancement levels, and the transmission power of the reference signal or the synchronization signal on the network side.
And further, the threshold value is equal to PRStx-MCLN+Poffset(ii) a Wherein, MCLNMaximum coupling loss value, P, between base station and terminal allowed for coverage enhancement level NRStxFor the transmission power value, P, of the network-side reference signal or synchronization signaloffsetA configurable threshold margin.
The physical random access channel parameter list selection threshold information is specifically used for indicating: and the terminal compares the measured value of the receiving power of the reference signal or the synchronous signal at the network side with the threshold value in the physical random access channel parameter list selection threshold information to determine the coverage enhancement level of the terminal.
In the foregoing embodiment, the physical random access channel parameter information includes: the frequency offset sent by the physical random access channel, the starting subframe number sent by the physical random access channel, the maximum trial number of random access requests and/or the pilot code repetition number of the physical random access channel.
The maximum trial number of the random access request and the repetition number of the pilot code of the physical random access channel are determined by the network side according to the coverage enhancement level of the terminal, or determined by the network side according to the power level of the terminal and the coverage enhancement level of the terminal.
The above embodiment of the present invention transmits physical random access channel parameter list selection threshold list information, physical random access channel parameter list selection threshold information, and physical random access channel parameter information through a network side; or sending physical random access channel parameter list selection threshold information and physical random access channel parameter information; the method can effectively support the configuration of reasonable physical random access channel resource configuration information for the terminals with different power levels when the terminals have a plurality of power levels, and meet the normal reception of the random access requests of the terminals under different network coverage.
Third embodiment
A third embodiment of the present invention provides a method for selecting physical random access channel parameter information, including:
The above method may further comprise:
and step 34, the terminal reads the physical random access channel parameter information corresponding to the coverage enhancement grade in the physical random access channel parameter list information according to the determined coverage enhancement grade.
The method for reading the corresponding physical random access channel parameter list selection threshold list information by the terminal according to the maximum transmission power of the terminal comprises the following steps:
the terminal determines the terminal physical random access channel parameter list selection threshold information corresponding to the power grade of the terminal according to the corresponding relation between the physical random access channel parameter list selection threshold information and the terminal power grade contained in the sequence of the physical random access channel parameter list selection threshold information and the power grade of the terminal;
the corresponding relationship between the physical random access channel parameter list selection threshold information contained in the sequence of the physical random access channel parameter list selection threshold list information and the terminal power level comprises:
and the physical random access channel parameter list selection threshold information in the physical random access channel parameter list selection threshold information sequence corresponds to the power grades of the terminals one by one.
Wherein, the determining, by the terminal, the coverage enhancement level at which the terminal is located according to the measurement value of the received power of the reference signal or the synchronization signal at the network side and the read physical random access channel parameter list selection threshold information includes:
and the terminal reads the physical random access channel parameter list selection threshold information, compares the measured value of the receiving power of the reference signal or the synchronous signal at the network side with the threshold value in the physical random access channel parameter list selection threshold information, and determines the network coverage enhancement level of the terminal.
For example, the physical random access channel parameter list selection threshold information is RSRPThresholds1And RSRPThresholds2Respectively corresponding to a coverage enhancement level one threshold and a coverage enhancement level two threshold; the measured value of the terminal on the network side reference signal received power is RSRPmeasureWhen RSRP is greater thanmeasure<RSRPThresholds2If so, the terminal judges that the coverage enhancement level is two; when RSRPmeasure<RSRPThresholds1The terminal judges that the coverage is enhanced and the likeA first stage; otherwise, the terminal judges that the coverage enhancement level is zero.
The above embodiment of the present invention selects threshold list information, physical random access channel parameter list selection threshold information, physical random access channel parameter list information, and physical random access channel parameter information by receiving a physical random access channel parameter list transmitted by a network side; or the sent physical random access channel parameter list selection threshold information, the physical random access channel parameter list information and the physical random access channel parameter information; the method can effectively support the configuration of reasonable physical random access channel resource configuration information for the terminals with different power levels when the terminals have a plurality of power levels, and meet the normal reception of the random access requests of the terminals under different network coverage.
Fourth embodiment
A fourth embodiment of the present invention provides a method for selecting physical random access channel parameter information, including:
and the terminal receives the physical random access channel parameter list selection threshold information and the physical random access channel parameter information sent by the network side.
Further, the method further comprises:
the terminal reads corresponding physical random access channel parameter list selection threshold information according to the power level of the terminal;
the terminal determines the coverage enhancement grade of the terminal according to the measured value of the receiving power of the reference signal or the synchronous signal at the network side and the threshold information selected by the physical random access channel parameter list;
and the terminal reads the physical random access channel parameter information corresponding to the determined coverage enhancement grade according to the determined coverage enhancement grade.
In the third and fourth embodiments, when the measured value of the receiving power of the reference signal or the synchronization signal at the network side by the terminal is smaller than the threshold value in the selection threshold information of the physical random access channel parameter list, the terminal determines that the network coverage enhancement level where the terminal is located is the coverage enhancement level corresponding to the threshold value.
In the third and fourth embodiments described above,
when the measured value of the receiving power of the reference signal or the synchronous signal at the network side by the terminal is larger than the threshold value in the physical random access channel parameter list selection threshold information, the terminal determines the network coverage enhancement grade of the terminal as the coverage enhancement grade corresponding to the threshold value.
In the third and fourth embodiments described above,
when RSRPmeasure<RSRPThresholds2If so, the terminal determines that the coverage enhancement level of the terminal is M3;
when RSRPmeasure<RSRPThresholds1Then the terminal determines that the coverage enhancement level of the terminal is M2; otherwise, the terminal determines that the network coverage enhancement level where the terminal is located is M1;
m1, M2 and M3 are different network coverage enhancement levels from each other;
wherein, RSRPThresholds1And RSRPThresholds2Selecting threshold value and RSRP in threshold information for parameter list of physical random access channelmeasureIs a measurement value of the received power of a terminal for a reference signal or a synchronization signal on the network side.
In the third and fourth embodiments described above,
when RSRPmeasure>RSRPThresholds3If so, the terminal determines that the coverage enhancement level of the terminal is M4;
when RSRPmeasure>RSRPThresholds4The terminal determines that the coverage enhancement level of the terminal is M5; otherwise, the terminal determines that the coverage enhancement level of the terminal is M6;
m4, M5 and M6 are coverage enhancement levels different from each other;
wherein, RSRPThresholds3And RSRPThresholds4Selecting threshold value and RSRP in threshold information for parameter list of physical random access channelmeasureIs a measurement value of the received power of a terminal for a reference signal or a synchronization signal on the network side.
Fifth embodiment
A fifth embodiment of the present invention provides a method for selecting physical random access channel parameter information, including:
the terminal receives the physical random access channel parameter list selection threshold information, the physical random access channel parameter list information and the physical random access channel parameter information sent by the network side.
In one implementation of this embodiment, the method can further include:
and the terminal determines the coverage enhancement level of the terminal according to the measured value of the receiving power of the reference signal or the synchronous signal at the network side and the selection threshold information of the physical random access channel parameter list.
In one implementation of this embodiment, the method can further include:
and the terminal determines the coverage enhancement grade of the terminal according to the power value corresponding to the reference power grade, the power value corresponding to the terminal power grade and the threshold information selected by the physical random access channel parameter list.
In one implementation of this embodiment, the method can further include:
when the measured value of the receiving power of the reference signal or the synchronous signal at the network side by the terminal is smaller than the sum value between the threshold value and the power compensation value in the physical random access channel parameter list selection threshold information, the terminal determines the coverage enhancement grade of the terminal as the coverage enhancement grade corresponding to the threshold value;
or, when the difference between the measured value of the received power of the reference signal or the synchronization signal at the network side and the power compensation value by the terminal is smaller than the threshold value in the selection threshold information of the physical random access channel parameter list, the terminal determines that the coverage enhancement level where the terminal is located is the coverage enhancement level corresponding to the threshold value.
In one implementation of this embodiment, the method can further include:
when the measured value of the receiving power of the reference signal or the synchronous signal at the network side by the terminal is larger than the sum value between the threshold value and the power compensation value in the physical random access channel parameter list selection threshold information, the terminal determines the coverage enhancement grade of the terminal as the coverage enhancement grade corresponding to the threshold value;
or, when the difference between the measured value of the receiving power of the reference signal or the synchronization signal at the network side and the power compensation value by the terminal is greater than the threshold value in the selection threshold information of the physical random access channel parameter list, the terminal determines that the coverage enhancement level where the terminal is located is the coverage enhancement level corresponding to the threshold value.
In one implementation of this embodiment, the method can further include: when RSRPmeasure<RSRPThresholds5+PcompensationIf so, the terminal determines that the network coverage enhancement level of the terminal is M7;
when RSRPmeasure<RSRPThresholds6-PcompensationThe terminal determines that the network coverage enhancement level of the terminal is M8; otherwise, the terminal determines that the network coverage enhancement grade of the terminal is M9;
m7, M8 and M9 are different network coverage enhancement levels from each other;
wherein, RSRPThresholds5And RSRPThresholds6Respectively selecting threshold values and RSRP (reference signal received power) respectively corresponding to coverage enhancement levels M7 and M8 in threshold information for the physical random access channel parameter listmeasureIs a measure of the received power, P, of the terminal for a reference signal or a synchronization signal on the network sidecompensationIs a power compensation value determined by a power value corresponding to the reference power level and a power value corresponding to the terminal power level.
In one implementation of this embodiment, the method can further include:
when RSRPmeasure>RSRPThresholds7+PcompensationIf so, the terminal determines that the coverage enhancement level of the terminal is M10;
when RSRPmeasure>RSRPThresholds8+PcompensationThe terminal determines that the coverage enhancement level of the terminal is M11; otherwise, the terminal determines that the coverage enhancement level of the terminal is M12;
m10, M11 and M12 are coverage enhancement levels different from each other;
wherein, RSRPThresholds7And RSRPThresholds8Respectively selecting threshold values and RSRP (reference signal received power) respectively corresponding to coverage enhancement levels M10 and M11 in threshold information for the physical random access channel parameter listmeasureIs a measure of the received power, P, of the terminal for a reference signal or a synchronization signal on the network sidecompensationIs a power compensation value determined by a power value corresponding to the reference power level and a power value corresponding to the terminal power level.
In one implementation of this embodiment, the method can further include:
the power compensation value is equal to the difference value between the power value corresponding to the reference power level of the terminal and the power value corresponding to the power level;
or the power compensation value is equal to the difference between the power value corresponding to the terminal reference power level and the power value corresponding to the power level, and then an additional compensation value is subtracted.
In the embodiment of the present invention, the method may further include: and the terminal reads the physical random access channel parameter information corresponding to the determined coverage enhancement grade according to the determined coverage enhancement grade.
In all embodiments of the above terminal receiving method of the present invention, the method may further include: and the terminal initiates a random access request according to the physical random access channel parameter information.
The embodiment of the invention can effectively support the configuration of reasonable physical random access channel resource configuration information for the terminals with different power grades when the terminals have a plurality of power grades, and meet the normal receiving of the random access requests of the terminals under different network coverage.
Another embodiment differs from the fifth embodiment mainly in that PcompensationThe manner of definition of (1).
PcompensationThe power compensation value is determined by the maximum uplink power value of the terminal of the cell and the power class of the terminal. Pcompensation＝PEMAX1–PPowerClass。PEMAX1Terminal of local cell for network broadcastHigh uplink power, PPowerClassThe power value corresponding to the power class of the terminal, for example, the maximum transmission power of 14dBm corresponding to the terminal of the power class 6, or the maximum transmission power of 20dBm corresponding to the terminal of the power class 5.
Wherein when RSRPmeasure<RSRPThresholds7+PcompensationIf so, the terminal determines that the network coverage enhancement level of the terminal is M10;
when RSRPmeasure<RSRPThresholds8+PcompensationThe terminal determines that the network coverage enhancement level of the terminal is M11; otherwise, the terminal determines that the network coverage enhancement grade of the terminal is M12;
in one implementation of this embodiment, the method can further include:
Pdeltathe power compensation value is determined by the maximum uplink power of the terminal of the cell and the power class of the terminal. Pdelta＝PEMAX1–PPowerClass，PEMAX1Maximum uplink power value, P, of local cell terminal for network broadcastPowerClassFor the power value corresponding to the power class of the terminal, for example, the maximum transmit power of 14dBm corresponding to the terminal of the power class 6, or the maximum transmit power of 20dBm corresponding to the terminal of the power class 5.
The terminal measures the RSRP of the terminal to the received power of the reference signal at the network sidemeasureMinus PdeltaThen, a corrected RSRP is obtainedmeasureCompensation＝RSRPmeasure-PdeltaComparing with the threshold value contained in the selection threshold information of the physical random access channel parameter list, and determining the coverage enhancement level of the terminal (i.e. if the power value corresponding to the terminal power level is smaller than the maximum transmission power value of the terminal of the local cell broadcasted by the network, then P is determineddeltaIf the RSRP is positive, the RSRP actually measured by the terminal needs to be decreased to select a coverage level more suitable for the low power terminal, i.e. RSRPmeasureCompensation＝RSRPmeasure-Pdelta(ii) a If the terminal is larger than the reference power, PdeltaIf the RSRP is negative, the RSRP actually measured by the terminal needs to be increased to select a more suitable RSRPCoverage level of power terminal, formula is still RSRPmeasureCompensation＝RSRPmeasure-Pdelta)
When RSRPmeasureCompensation<RSRPThresholds9If so, the terminal determines that the network coverage enhancement level of the terminal is M13;
when RSRPmeasureCompensation<RSRPThresholds10If so, the terminal determines that the network coverage enhancement level of the terminal is M14; otherwise, the terminal determines that the network coverage enhancement level of the terminal is M15.
Sixth embodiment
A sixth embodiment of the present invention, corresponding to the first, second, and third embodiments, further provides a network side device, including:
a sending module, configured to send physical random access channel parameter list selection threshold information, physical random access channel parameter list information, and physical random access channel parameter information; or for sending physical random access channel parameter list selection threshold information, physical random access channel parameter list information, and physical random access channel parameter information.
It should be noted that all the implementation methods described above in the first, second, and third embodiments are applicable to the embodiment of the network side device, and the same technical effects can be achieved.
The network side device may be a base station, the sending module of the network side device may be implemented by a transmitter, and the network side device may further include a processor for processing the physical random access channel parameter list selection threshold information, the physical random access channel parameter list information, and the physical random access channel parameter information, and a memory for storing the information.
The embodiment of the invention can effectively support the configuration of reasonable physical random access channel resource configuration information for the terminals with different power grades when the terminals have a plurality of power grades, and meet the normal receiving of the random access requests of the terminals under different network coverage.
Seventh embodiment
Corresponding to the fourth, fifth, and sixth embodiments, a seventh embodiment of the present invention further provides a terminal, including:
the receiving module is used for receiving physical random access channel parameter list selection threshold information, physical random access channel parameter list information and physical random access channel parameter information sent by a network side; or the physical random access channel parameter list selection threshold information, the physical random access channel parameter list information and the physical random access channel parameter information sent by the network side are received.
It should be noted that all the implementation methods described above with respect to the terminal are applicable to the embodiment of the terminal, and the same technical effects can be achieved.
The terminal may be a user equipment, the receiving module of the terminal may be implemented by a receiver, and the terminal may further include a processor for processing the physical random access channel parameter list selection threshold information, the physical random access channel parameter list information, and the physical random access channel parameter information, and a memory for storing the information.
The embodiment of the invention can effectively support the configuration of reasonable physical random access channel resource configuration information for the terminals with different power grades when the terminals have a plurality of power grades, and meet the normal receiving of the random access requests of the terminals under different network coverage.
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 (27)
1. A method for configuring physical random access channel parameters is characterized by comprising the following steps:
a network side sends physical random access channel parameter list information and physical random access channel parameter list selection threshold list information;
the physical random access channel parameter list information is used for indicating a terminal to read physical random access channel parameter information corresponding to the coverage enhancement grade in the physical random access channel parameter list information according to the determined coverage enhancement grade;
the physical random access channel parameter list selection threshold list information is used for indicating a terminal to read physical random access channel parameter list selection threshold information corresponding to the power grade in the physical random access channel parameter list selection threshold list information according to the power grade of the terminal.
2. The method of claim 1, wherein the physical random access channel parameter list selection threshold information comprises a set of physical random access channel parameter list selection threshold values, and the number of the physical random access channel parameter list selection threshold values is determined by the number of coverage enhancement levels.
3. The method of claim 1, wherein the number of physical random access channel parameter list selection threshold information included in the physical random access channel parameter list selection threshold list information is determined by the number of terminal power classes.
4. The method of claim 3, wherein the physical random access channel parameter list selection threshold list information and the terminal power class are associated as follows:
the physical random access channel parameter list selection threshold information contained in the physical random access channel parameter list selection threshold information corresponds to the terminal power level.
5. The method for configuring physical random access channel parameters according to claim 4, wherein the physical random access channel parameter list selection threshold information included in the physical random access channel parameter list selection threshold list information sequence corresponds to a terminal power class, and specifically comprises:
the Nth physical random access channel parameter list selection threshold information in the physical random access channel parameter list selection threshold list information corresponds to the terminal power level M;
reading Nth physical random access channel parameter list selection threshold information in the physical random access channel parameter list selection threshold list information by a terminal with the power level of M;
the value ranges of N and M are {1, 2, …, maxPower-Class }, the maxPower-Class is the number of terminal power levels, and M and N are positive integers.
6. The method of claim 3 or claim 5, wherein the number of terminal power classes is: a preset number of terminal power classes, or a maximum number of terminal power classes defined in a standard, or a number of terminal power classes actually used by the terminal.
7. The method of configuring physical random access channel parameters of claim 1, claim 4 or claim 5,
the physical random access channel parameter list selection threshold information is used for indicating a terminal to determine the coverage enhancement level of the terminal according to the measured value of the receiving power of the reference signal or the synchronous signal sent by the network side and the physical random access channel parameter list selection threshold value contained in the physical random access channel parameter list selection threshold information.
8. The method of claim 2, wherein the physical random access channel parameter list selection threshold is determined by maximum coupling loss between the base station and the terminal allowed by the network side according to different coverage enhancement levels and transmission power of a reference signal or a synchronization signal sent by the network side.
9. The method of claim 8, wherein the threshold value is equal to PRStx-MCLN+Poffset；
Wherein, MCLNMaximum coupling loss value, P, between base station and terminal allowed for network side coverage enhancement level NRStxFor the transmission power value, P, of the network-side reference signal or synchronization signaloffsetIs a configurable threshold margin.
10. The method of claim 1, wherein the number of the physical random access channel parameter messages is a preset value;
the preset value is equal to the number of coverage enhancement levels;
or, the preset value is equal to the number of coverage enhancement grades multiplied by the number of terminal power grades;
or, the preset value is equal to the number of the physical random access channel parameter list selection threshold values contained in the physical random access channel parameter list selection threshold information plus 1.
11. The method of claim 1 or claim 10, wherein the physical random access channel parameter information comprises: the frequency offset sent by the physical random access channel, the starting subframe number sent by the physical random access channel, the maximum trial number of random access requests and/or the pilot code repetition number of the physical random access channel.
12. The method of claim 11, wherein the maximum number of random access request attempts and the number of physical random access channel pilot code repetitions are both determined by a network side according to a coverage enhancement level of a terminal, or determined by the network side according to a terminal power level and a coverage enhancement level of the terminal.
13. A method for selecting physical random access channel parameter information is characterized by comprising the following steps:
a terminal receives physical random access channel parameter list information and physical random access channel parameter list selection threshold list information sent by a network side;
the physical random access channel parameter list information is used for indicating a terminal to read physical random access channel parameter information corresponding to the coverage enhancement grade in the physical random access channel parameter list information according to the determined coverage enhancement grade;
the terminal reads physical random access channel parameter list selection threshold information corresponding to the power grade in the physical random access channel parameter list selection threshold list information according to the power grade of the terminal; or, if the measured value of the receiving power of the reference signal or the synchronization signal sent by the network side by the terminal is smaller than the sum of the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement Level N in the physical random access channel parameter list selection threshold information and the power compensation value, the terminal considers that the terminal is in the coverage enhancement Level N, wherein the value range of N is {1, 2, …, maxCE-Level }, maxCE-Level is the number of the coverage enhancement levels or the maximum coverage Level value, and M and N are positive integers.
14. The method of claim 13, further comprising:
and the terminal determines the coverage enhancement grade of the terminal according to the measured value of the receiving power of the reference signal or the synchronous signal sent by the network side and the read physical random access channel parameter list selection threshold information.
15. The method for selecting physical random access channel parameter information according to claim 14, further comprising:
and the terminal reads a group of physical random access channel parameter list selection threshold values contained in the physical random access channel parameter list selection threshold information, compares the measured value of the receiving power of the reference signal or the synchronous signal sent by the network side with the physical random access channel parameter list selection threshold values, and determines the coverage enhancement level of the terminal.
16. The method for selecting physical random access channel parameter information according to claim 14 or 15, further comprising:
if the measured value of the receiving power of the reference signal or the synchronous signal sent by the network side by the terminal is smaller than the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement level N in the physical random access channel parameter list selection threshold information, the terminal considers that the terminal is in the coverage enhancement level N;
the value range of N is {1, 2, …, maxCE-Level }, maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value, and M and N are positive integers.
17. The method for selecting physical random access channel parameter information according to claim 14 or 15, further comprising:
if the measured value of the receiving power of the reference signal or the synchronous signal sent by the network side by the terminal is larger than the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement grade M in the physical random access channel parameter list selection threshold information, the terminal considers that the terminal is in the coverage enhancement grade M;
the value range of M is {1, 2, …, maxCE-Level }, maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value, and M and N are positive integers.
18. The method for selecting physical random access channel parameter information according to claim 14, further comprising:
and the terminal determines the coverage enhancement grade of the terminal according to the power value corresponding to the reference power grade, the power value corresponding to the power grade of the terminal and the threshold information selected by the physical random access channel parameter list.
19. The method for selecting physical random access channel parameter information according to claim 13 or claim 14, further comprising:
and the terminal determines the coverage enhancement grade of the terminal according to the maximum transmitting power value of the terminal in the cell, the power value corresponding to the power grade of the terminal and the threshold information selected by the physical random access channel parameter list.
20. The method of claim 13, wherein the physical random access channel parameter information is selected from the group consisting of a channel quality indicator,
if the difference value between the measured value of the receiving power of the reference signal or the synchronous signal sent by the network side and the power compensation value is smaller than the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement level N in the physical random access channel parameter list selection threshold information, the terminal considers that the terminal is in the coverage enhancement level N;
the value range of N is {1, 2, …, maxCE-Level }, maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value, and M and N are positive integers.
21. The method of claim 13, wherein the physical random access channel parameter information is selected from the group consisting of a channel quality indicator,
if the measured value of the receiving power of the reference signal or the synchronous signal sent by the network side by the terminal is larger than the sum of the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement level N in the physical random access channel parameter list selection threshold information and the power compensation value, the terminal considers that the terminal is in the coverage enhancement level N;
the value range of N is {1, 2, …, maxCE-Level }, maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value, and M and N are positive integers.
22. The method of claim 13, wherein the physical random access channel parameter information is selected from the group consisting of a channel quality indicator,
if the difference value between the measured value of the receiving power of the reference signal or the synchronous signal sent by the network side and the power compensation value is larger than the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement level N in the physical random access channel parameter list selection threshold information, the terminal considers that the terminal is in the coverage enhancement level N;
the value range of N is {1, 2, …, maxCE-Level }, maxCE-Level is the number of coverage enhancement levels or the maximum coverage Level value, and M and N are positive integers.
23. The method for selecting physical random access channel parameter information according to any one of claims 20 to 22, further comprising:
the power compensation value is equal to the difference value between the power value corresponding to the reference power level and the power value corresponding to the power level of the terminal;
or the power compensation value is equal to the difference between the maximum transmitting power value of the terminal in the cell and the power value corresponding to the power level of the terminal.
24. The method for selecting physical random access channel parameter information according to claim 14, claim 15, or any one of claims 20-22, further comprising:
and the terminal reads the physical random access channel parameter information corresponding to the coverage enhancement grade in the physical random access channel parameter list information according to the determined coverage enhancement grade.
25. The method of claim 23, further comprising:
and the terminal initiates a random access request according to the physical random access channel parameter information.
26. A network-side device, comprising:
a sending module, configured to send physical random access channel parameter list information and physical random access channel parameter list selection threshold list information; the physical random access channel parameter list information is used for indicating a terminal to read physical random access channel parameter information corresponding to the coverage enhancement grade in the physical random access channel parameter list information according to the determined coverage enhancement grade; the physical random access channel parameter list selection threshold list information is used for indicating a terminal to read physical random access channel parameter list selection threshold information corresponding to the power grade in the physical random access channel parameter list selection threshold list information according to the power grade of the terminal.
27. A terminal, comprising:
a receiving module, configured to receive physical random access channel parameter list information and physical random access channel parameter list selection threshold list information;
the physical random access channel parameter list information is used for indicating a terminal to read physical random access channel parameter information corresponding to the coverage enhancement grade in the physical random access channel parameter list information according to the determined coverage enhancement grade;
the physical random access channel parameter list selection threshold list information is used for indicating a terminal to read physical random access channel parameter list selection threshold information corresponding to the power grade in the physical random access channel parameter list selection threshold list information according to the power grade of the terminal; or, if the measured value of the receiving power of the reference signal or the synchronization signal sent by the network side by the terminal is smaller than the sum of the physical random access channel parameter list selection threshold value corresponding to the coverage enhancement Level N in the physical random access channel parameter list selection threshold information and the power compensation value, the terminal considers that the measured value is in the coverage enhancement Level N, wherein the value range of N is {1, 2, …, maxCE-Level }, maxCE-Level is the number of the coverage enhancement levels or the maximum coverage Level value, and M and N are positive integers.
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| PCT/CN2018/078016 WO2018192310A1 (en) | 2017-04-21 | 2018-03-05 | Configuration method for physical random access channel parameters, information selection method for physical random access channel parameters, network side device and terminal |
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| CN109275157B (en) * | 2018-11-28 | 2021-08-17 | 中国联合网络通信集团有限公司 | Configuration parameter optimization method and device for NPRACH (network-defined random Access channel) of base station |
| CN112423371B (en) * | 2019-08-20 | 2022-03-08 | 华为技术有限公司 | Method, system and device for selecting cell |
| CN111201831B (en) * | 2019-11-11 | 2022-02-01 | 北京小米移动软件有限公司 | Random access method and device, terminal and storage medium |
| CN113099532B (en) * | 2020-01-09 | 2023-01-03 | 中国移动通信有限公司研究院 | Method and device for determining coverage enhancement grade |
| WO2022006721A1 (en) * | 2020-07-06 | 2022-01-13 | 北京小米移动软件有限公司 | Communication method, communication apparatus, and storage medium |
| CN114143865A (en) * | 2020-09-04 | 2022-03-04 | 大唐移动通信设备有限公司 | Random access method, terminal and network side equipment |
| EP4207922A4 (en) * | 2020-09-29 | 2023-10-25 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Wireless communication method, terminal device and network device |
| US11251888B1 (en) * | 2020-12-18 | 2022-02-15 | Itron, Inc. | Preserving battery life in poor signal conditions using RF link analysis |
| US11638215B2 (en) | 2020-12-18 | 2023-04-25 | Itron, Inc. | Techniques for preserving battery life in poor signal conditions using cellular protocol information |
| WO2023000273A1 (en) * | 2021-07-22 | 2023-01-26 | Oppo广东移动通信有限公司 | Network access method and apparatus, parameter configuration method and apparatus, and device and storage medium |
| WO2023230974A1 (en) * | 2022-06-02 | 2023-12-07 | Qualcomm Incorporated | Random access procedure based on energy harvesting class |
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