CN106162766B

CN106162766B - Cell reselection method, device and terminal

Info

Publication number: CN106162766B
Application number: CN201510185769.XA
Authority: CN
Inventors: 余媛芳; 杜忠达; 黄河
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-04-17
Filing date: 2015-04-17
Publication date: 2021-02-09
Anticipated expiration: 2035-04-17
Also published as: WO2016165267A1; CN106162766A

Abstract

The invention discloses a cell reselection method.A terminal determines cell reselection signal offset according to a randomization algorithm, and utilizes the cell reselection signal offset to carry out cell reselection measurement and/or cell reselection judgment processing; the invention also discloses a cell reselection device and a terminal.

Description

Cell reselection method, device and terminal

Technical Field

The present invention relates to wireless communication technologies, and in particular, to a cell reselection method, apparatus and terminal.

Background

Long Term Evolution (LTE) is a wireless communication 4G technology established by The 3rd Generation Partnership Project (3 GPP) organization. With the wide deployment of the LTE, the method attracts the influx of a large number of intelligent terminals, and more LTE terminals can be expected to reside and perform services in the network; to meet the rapidly increasing number of users and the traffic demand, deploying multiple carriers in a network for offloading of users and traffic is a common solution adopted by operators. For load balancing of a connected terminal, the terminal may be distributed to different cells of different carriers through mechanisms such as load information interaction, dual linking, handover, and redirection, however, an existing LTE idle cell reselection mechanism may destroy a connected load balancing policy and cause potential problems, including:

1) the existing common cell reselection mechanism based on different frequency priorities may cause all idle state terminals to concentrate on a highest priority carrier, and may cause a load of a high priority carrier to rapidly increase or overload, thereby affecting system performance and user experience, as shown in fig. 1, a frequency 1 of a cell 1 is a high priority, and is currently in a heavy load state, but the idle state terminals may still reselect the cell 1;

2) the existing common cell reselection mechanism based on the same frequency priority may still cause a large number of terminals with similar positions to inrush the same carrier, which causes the carrier load to increase or overload rapidly, thereby affecting system performance and user experience, as shown in fig. 2, the frequency priorities of a cell 1, a cell 2, and a cell 3 are the same, but a large number of terminals with similar positions may inrush the cell 3 with light load at the same time;

3) the existing common cell reselection mechanism based on the same frequency priority needs to coordinate reselection parameters among cells, otherwise ping-pong of cell reselection may be caused, which results in increased power consumption of a terminal and reduced user experience;

4) the cell reselection mechanism based on the special priority cannot adapt to the characteristics of time-varying service load of carriers and terminal position-varying service load, so that reasonable distribution of terminals among carriers cannot be realized; the signaling load from dynamically updating the dedicated priorities may also affect system performance.

Different cell types can coexist in an LTE network and constitute a heterogeneous network, which will be a typical network existence form of LTE deployment. In a scenario where multiple cell types coexist, in consideration of the diversity and the small coverage of the load conditions of small cells, blindly directing a terminal to a small cell may cause that the terminal cannot be accessed or power consumption increases, thereby affecting user experience; on the other hand, using small cells as much as possible is also the first intention of operators to deploy small cells. However, the existing LTE idle cell reselection mechanism has difficulty in well controlling the idle terminal camping in the small cell, as shown in fig. 3, for example: once the priority of the frequency to which a small cell such as cell 3 belongs is increased or the frequency or cell offset of cell 3 is set to a value that tends to cause a terminal to reselect to cell 3 (e.g., the offset is set to a negative value), all terminals in the coverage area may reselect to cell 3, potentially causing access problems and affecting the traffic experience in subsequent connection states, etc.

Disclosure of Invention

In order to solve the existing technical problems, the invention mainly provides a cell reselection method, a cell reselection device and a terminal.

The technical scheme of the invention is realized as follows:

the invention provides a cell reselection method, which comprises the following steps:

and the terminal determines the cell reselection signal offset according to a randomization algorithm, and measures the cell reselection and/or judges the cell reselection by utilizing the cell reselection signal offset.

The present invention also provides a cell reselection apparatus, comprising: the signal offset determining module and the executing module; wherein,

a signal offset determining module for determining a cell reselection signal offset according to a randomization algorithm;

and the execution module is used for carrying out cell reselection measurement and/or cell reselection judgment processing by utilizing the cell reselection signal offset.

The invention also provides a terminal which comprises the cell reselection device.

The invention provides a cell reselection method, a device and a terminal, wherein the terminal determines a cell reselection signal bias according to a randomization algorithm, and performs cell reselection measurement and/or cell reselection judgment processing by using the cell reselection signal bias; therefore, the problem that the terminal concentrates on a certain specific carrier or cell in an idle state cell reselection mechanism in the prior art can be avoided, more balanced idle state cell distribution is realized, ping-pong of cell reselection can not be caused, and the increase of power consumption of the terminal and the reduction of user experience are avoided.

Drawings

Fig. 1 is a schematic diagram illustrating a conventional cell reselection mechanism based on different frequency priorities;

fig. 2 is a schematic diagram illustrating a conventional cell reselection mechanism based on the same frequency priority;

fig. 3 is a schematic diagram of a reselection mechanism of an existing LTE idle cell for a small cell;

fig. 4 is a schematic diagram illustrating a conventional process of cell reselection with higher frequency priority;

fig. 5 is a schematic diagram illustrating a conventional cell reselection to the same frequency priority;

fig. 6 is a schematic diagram illustrating a conventional cell reselection with lower frequency priority;

fig. 7 is a flowchart illustrating a cell reselection method according to an embodiment of the present invention;

fig. 8 is a diagram illustrating the result of a cell reselection apparatus according to an embodiment of the present invention;

fig. 9 is a schematic diagram illustrating a process of cell reselection for higher frequency priority according to an embodiment of the present invention;

fig. 10 is a schematic diagram illustrating another process of reselecting a cell with higher frequency priority according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating a process of cell reselection for the same frequency priority according to an embodiment of the present invention;

fig. 12 is a schematic diagram illustrating another cell reselection for the same frequency priority according to an embodiment of the present invention;

fig. 13 is a schematic diagram illustrating a process of cell reselection for a lower frequency priority according to an embodiment of the present invention;

fig. 14 is a schematic diagram illustrating another cell reselection with lower frequency priority according to an embodiment of the present invention;

fig. 15 is an exemplary diagram of cell reselection for lower frequency priority according to an embodiment of the present invention;

fig. 16 is a diagram illustrating a situation after a cell reselection for a lower frequency priority according to an embodiment of the present invention.

Detailed Description

Fig. 4 is a schematic diagram illustrating a prior art process of cell reselection with higher frequency priority, including:

step 101: the terminal judges whether the signal parameter of the serving cell is greater than a first threshold, if so, the step 103 is executed; if not, executing step 102; the first threshold represents a threshold value for starting pilot frequency measurement;

step 102: the terminal determines that the serving cell signal parameter is less than or equal to a first threshold, and executes step 103;

step 103: judging whether a non-service cell with the frequency priority greater than that of the service cell exists, if so, executing step 104; here, if the step 102 is executed to this step, the cell on the frequency point with the low frequency priority and the same frequency priority is measured, but the measurement is not considered in the present embodiment.

Step 104: measuring the signal parameters of the non-serving cell, and measuring the signal parameters of the serving cell in different periods under the two conditions that the signal parameters of the serving cell are greater than or equal to a first threshold;

the signal parameter may be a cell signal strength, such as a cell reselection received power value calculated from a Reference Signal Received Power (RSRP), or a cell signal quality, such as a cell reselection signal quality value calculated from a Reference Signal Received Quality (RSRQ), or a cell signal to noise ratio.

Step 105: and determining that the signal parameter of the non-service cell is greater than a third signal threshold and meets other conditions of cell reselection, and reselecting the non-service cell, wherein the third signal threshold represents a signal threshold for reselecting the different-frequency adjacent cell with higher frequency priority. The other conditions may refer to the specification of the 3GPP specification, such as that the terminal residence time in the serving cell exceeds a specified time duration.

Fig. 5 is a schematic flowchart of cell reselection for the same frequency priority in the prior art, including:

step 201: the terminal judges whether the serving cell signal parameter is greater than a first threshold, if so, the step 206 is executed; if not, go to step 202;

step 202: the terminal determines that the serving cell signal parameter is less than or equal to a first threshold, and executes step 103;

step 203: measuring signal parameters of a serving cell and a non-serving cell with the same frequency priority according to a specified period to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell;

step 204: sequencing the serving cell and the non-serving cell according to the first measurement result and the third measurement result;

step 205: if the third measurement result is larger than the first measurement result and meets other conditions of cell reselection, reselecting the non-service cell, and ending the process; if the third measurement result is less than the first measurement result, step 207 is performed. The other conditions may refer to the specification of the 3GPP specification, such as that the terminal residence time in the serving cell exceeds a specified time duration.

Step 206: determining that no non-serving cell exists with a frequency priority greater than a frequency priority of the serving cell;

step 207: and continuing to reside in the serving cell.

Fig. 6 is a schematic diagram illustrating a prior art process of cell reselection with lower frequency priority, including:

step 301: the terminal judges whether the serving cell signal parameter is greater than a first threshold, if so, the step 305 is executed; if not, go to step 302;

step 302: the terminal determines that the serving cell signal parameter is less than or equal to a first threshold, and executes step 303;

step 303: determining that a frequency point with lower frequency priority exists, and measuring signal parameters of a non-service cell on the frequency point with the lower frequency priority according to a specified period;

step 304: determining that the signal parameter of the non-serving cell is greater than a fifth signal threshold, the signal parameter of the serving cell is less than a seventh signal threshold, and other conditions of cell reselection are met, reselecting the non-serving cell, and ending the process; if the above condition is not satisfied, go to step 306; the fifth signal threshold represents a signal threshold for reselecting the different-frequency adjacent cell with lower frequency priority; the seventh signal threshold characterizes a signal threshold of a serving cell in inter-frequency cell reselection with a lower frequency priority. The other conditions may refer to the specification of the 3GPP specification, such as that the terminal residence time in the serving cell exceeds a specified time duration.

Step 305: determining that no non-serving cell exists with a frequency priority greater than a frequency priority of the serving cell;

step 306: and continuing to reside in the serving cell.

In the embodiment of the invention, the terminal determines the cell reselection signal offset according to a randomization algorithm, and the cell reselection measurement and/or the cell reselection judgment processing are/is carried out by utilizing the cell reselection signal offset.

The invention is further described in detail below with reference to the figures and the specific embodiments.

An embodiment of the present invention implements a cell reselection method, as shown in fig. 7, where the method includes the following steps:

step 401: the terminal determines the cell reselection signal offset according to a randomization algorithm;

specifically, the terminal obtains a value range of cell reselection signal offset from the base station through broadcasting or unicasting, calculates a random number, and determines the cell reselection signal offset according to the value range and the random number; or,

a terminal obtains cell reselection signal bias and corresponding bias probability from a base station through broadcasting or unicasting, calculates a random number, and determines to use the cell reselection signal bias according to the bias probability and the random number;

the cell reselection signal biasing comprises: a first signal offset, and/or a second signal offset, and/or a third signal offset, and/or a fourth signal offset; wherein,

the first signal offset is used for correcting a first threshold, namely the first signal offset is added with the first threshold to obtain a corrected second threshold, and the second threshold is used for judging the start of the pilot frequency cell reselection measurement; the first threshold represents a threshold value for starting pilot frequency measurement;

and/or the first signal offset is used for correcting a first measurement result, that is, the first signal offset is added with the first measurement result to obtain a corrected second measurement result, and the second measurement result is used for performing the judgment of the pilot frequency cell reselection with the same frequency priority; the first measurement result represents the measurement result of the serving cell selected by the pilot frequency cell reselection with the same frequency priority;

and/or the first signal offset is used for correcting a seventh signal threshold, that is, the seventh signal threshold is added to the first signal offset to obtain an eighth corrected signal threshold, and the eighth signal threshold is used for performing the judgment of the pilot frequency cell reselection with lower frequency priority; the seventh signal threshold represents the signal threshold of the serving cell in the pilot cell reselection with lower frequency priority;

and/or the second signal offset is used for correcting a third measurement result, that is, the second signal offset is added with the third measurement result to obtain a corrected fourth measurement result, and the fourth measurement result is used for performing the judgment of the pilot frequency cell reselection with the same frequency priority; the third measurement result represents the measurement result of the non-service cell selected by the pilot frequency cell reselection with the same frequency priority; wherein the second signal bias comprises one or a combination of: and configuring the second signal offset according to the cell, and configuring the second signal offset according to the frequency point to which the cell belongs, wherein if a plurality of non-serving cells exist, each non-serving cell can independently configure the second signal offset.

And/or the third signal offset is used for correcting a third signal threshold, that is, the third signal offset is added with the third signal threshold to obtain a corrected fourth signal threshold, and the fourth signal threshold is used for judging the pilot frequency cell reselection with higher frequency priority; the third signal threshold represents a signal threshold for reselecting the different-frequency adjacent cell with higher frequency priority; wherein the third signal offset comprises one or a combination of: and the third signal offset configured according to the cell and the third signal offset configured according to the frequency point to which the cell belongs, wherein if a plurality of different-frequency adjacent cells exist, each different-frequency adjacent cell can be independently configured with the third signal offset.

And/or the fourth signal offset is used for correcting a fifth signal threshold, that is, the fourth signal offset is added with the fifth signal threshold to obtain a corrected sixth signal threshold, and the sixth signal threshold is used for performing the judgment of the pilot frequency cell reselection with lower frequency priority; the fifth signal threshold represents a signal threshold for reselecting the different-frequency adjacent cell with lower frequency priority; wherein the fourth signal offset comprises one or a combination of: and a fourth signal offset configured according to the cell and a fourth signal offset configured according to the frequency point to which the cell belongs, wherein if a plurality of different-frequency adjacent cells exist, each different-frequency adjacent cell can be independently configured with the fourth signal offset.

Step 402: and the terminal performs cell reselection measurement and/or cell reselection judgment processing by using the cell reselection signal bias.

Specifically, in one embodiment, the terminal determines the first signal offset and/or the third signal offset according to a randomization algorithm; and/or, correcting the first threshold according to the first signal offset to obtain a corrected second threshold; and/or correcting the third signal threshold according to the third signal offset to obtain a corrected fourth signal threshold.

In this embodiment, when the terminal can obtain the second threshold and the fourth threshold, the terminal performs cell reselection operation using the second threshold and the fourth threshold; when the terminal cannot obtain the second threshold or the fourth threshold, the terminal performs cell reselection operation, such as cell reselection measurement, cell reselection decision, and the like, using the corresponding first threshold or third threshold.

The terminal compares the signal parameter of the serving cell with the second threshold, when the signal parameter of the serving cell is greater than the second threshold, if a non-serving cell with the frequency priority greater than that of the serving cell exists, the signal parameter of the non-serving cell is measured according to a first period, the signal parameter of the non-serving cell is determined to be greater than a fourth signal threshold, other conditions of cell reselection are met, and the non-serving cell is reselected; or,

the terminal compares the signal parameter of the serving cell with the second threshold, when the signal parameter of the serving cell is greater than the second threshold, if a non-serving cell with the frequency priority greater than that of the serving cell exists, the signal parameter of the non-serving cell is measured according to a first period, the signal parameter of the non-serving cell is determined to be greater than a third signal threshold, other conditions of cell reselection are met, and the non-serving cell is reselected; or,

and the terminal compares the signal parameter of the serving cell with the first threshold, measures the signal parameter of the non-serving cell according to a first period if the non-serving cell with the frequency priority higher than that of the serving cell exists when the signal parameter of the serving cell is higher than the first threshold, determines that the signal parameter of the non-serving cell is higher than a fourth signal threshold and meets other conditions of cell reselection, and reselects the non-serving cell.

Preferably, in the embodiment, the terminal compares the signal parameter of the serving cell with a second threshold, and when the signal parameter of the serving cell is smaller than or equal to the second threshold, if a non-serving cell with a frequency priority greater than that of the serving cell exists, the signal parameter of the non-serving cell is measured according to a second period, it is determined that the signal parameter of the non-serving cell is greater than a fourth signal threshold and meets other conditions of cell reselection, and the non-serving cell is reselected; or,

the terminal compares the signal parameter of the serving cell with the second threshold, when the signal parameter of the serving cell is smaller than or equal to the second threshold, if a non-serving cell with the frequency priority larger than that of the serving cell exists, the signal parameter of the non-serving cell is measured according to a second period, the signal parameter of the non-serving cell is determined to be larger than a third signal threshold and meet other conditions of cell reselection, and the non-serving cell is reselected; or,

and the terminal compares the signal parameter of the serving cell with the first threshold, measures the signal parameter of the non-serving cell according to a second period if the non-serving cell with the frequency priority higher than that of the serving cell exists when the signal parameter of the serving cell is smaller than or equal to the first threshold, determines that the signal parameter of the non-serving cell is larger than a fourth signal threshold and meets other conditions of cell reselection, and reselects the non-serving cell.

In one embodiment, the terminal determines the first signal offset and/or the second signal offset according to a randomization algorithm; and/or correcting the first threshold according to the first signal offset to obtain a corrected second threshold.

In this embodiment, when the terminal is capable of obtaining the second threshold, and/or the first signal offset, and/or the second signal offset, the terminal performs a cell reselection operation using the first threshold, and/or the second measurement result, and/or the fourth measurement result; and when the second threshold, the first signal offset and/or the second signal offset cannot be obtained, the terminal performs cell reselection operation by using the corresponding first threshold, the first measurement result and/or the third measurement result.

The terminal compares the signal parameters of the serving cell with the second threshold, measures the signal parameters of the serving cell and the non-serving cell with the same frequency priority according to a third period when the signal parameters of the serving cell are less than or equal to the second threshold to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell, corrects the first measurement result according to the first signal offset to obtain a corrected second measurement result, corrects the third measurement result according to the second signal offset to obtain a corrected fourth measurement result, determines that the fourth measurement result is greater than the second measurement result and meets other conditions of cell reselection, and reselects the non-serving cell; or,

the terminal compares the signal parameters of the serving cell with the second threshold, measures the signal parameters of the serving cell and the non-serving cell with the same frequency priority according to a third period when the signal parameters of the serving cell are less than or equal to the second threshold to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell, corrects the first measurement result according to the first signal offset to obtain a corrected second measurement result, determines that the third measurement result is greater than the second measurement result and meets other conditions of cell reselection, and reselects the non-serving cell; or,

the terminal compares the signal parameter of the serving cell with the first threshold, measures the signal parameter of the serving cell and the signal parameter of the non-serving cell with the same frequency priority according to a third period when the signal parameter of the serving cell is smaller than or equal to the first threshold to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell, corrects the third measurement result according to the second signal bias to obtain a corrected fourth measurement result, determines that the fourth measurement result is larger than the first measurement result and meets other conditions of cell reselection, and reselects the non-serving cell.

In the embodiment, when there are multiple non-serving cells, the fourth measurement result of the first non-serving cell is preferentially determined to be greater than the second measurement result and meet other conditions of cell reselection according to the fourth measurement results of the non-serving cells sorted from high to low, and the non-serving cell ranked in the first position is reselected; or when a plurality of non-service cells exist, determining that the fourth measurement result of the first non-service cell is greater than the first measurement result and meets other conditions of cell reselection according to the high-to-low ranking of the fourth measurement results of the non-service cells, and reselecting the non-service cell ranked at the first position; or when a plurality of non-service cells exist, determining that the third measurement result of the first non-service cell is greater than the second measurement result and meets other conditions of cell reselection according to the third measurement results of the non-service cells sorted from high to low, and reselecting the non-service cell ranked at the first position.

In one embodiment, the terminal determines the first signal offset and/or the fourth signal offset according to a randomization algorithm; and/or, correcting the first threshold according to the first signal offset to obtain a corrected second threshold; and/or, correcting the seventh signal threshold according to the first signal offset to obtain a corrected eighth signal threshold; and/or correcting the fifth signal threshold according to the fourth signal offset to obtain a corrected sixth signal threshold. In this embodiment, when the terminal is capable of obtaining the second threshold, and/or the sixth threshold, and/or the eighth threshold, the terminal performs a cell reselection operation using the second threshold, and/or the sixth threshold, and/or the eighth threshold; and when the terminal cannot obtain the second threshold, and/or the sixth threshold, and/or the eighth threshold, performing cell reselection operation by using the corresponding first threshold, and/or the fifth threshold, and/or the seventh threshold.

The terminal compares the signal parameter of the serving cell with the second threshold, measures the signal parameter of the non-serving cell with lower frequency priority according to a fourth period when the signal parameter of the serving cell is less than or equal to the second threshold, determines that the signal parameter of the non-serving cell is greater than the sixth signal threshold, the signal parameter of the serving cell is less than the eighth signal threshold, meets other conditions of cell reselection, and reselects the non-serving cell; or,

the terminal compares the signal parameter of the serving cell with the second threshold, measures the signal parameter of the non-serving cell with lower frequency priority according to a fourth period when the signal parameter of the serving cell is less than or equal to the second threshold, determines that the signal parameter of the non-serving cell is greater than the fifth signal threshold, the signal parameter of the serving cell is less than the eighth signal threshold, meets other conditions of cell reselection, and reselects the non-serving cell; or,

the terminal compares the signal parameter of the serving cell with the first threshold, measures the signal parameter of the non-serving cell with lower frequency priority according to a fourth period when the signal parameter of the serving cell is less than or equal to the first threshold, determines that the signal parameter of the non-serving cell is greater than the sixth signal threshold, the signal parameter of the serving cell is less than the eighth signal threshold, meets other conditions of cell reselection, and reselects the non-serving cell; or,

the terminal compares the signal parameter of the serving cell with the first threshold, measures the signal parameter of the non-serving cell with lower frequency priority according to a fourth period when the signal parameter of the serving cell is less than or equal to the first threshold, determines that the signal parameter of the non-serving cell is greater than the sixth signal threshold, the signal parameter of the serving cell is less than the seventh signal threshold, meets other conditions of cell reselection, and reselects the non-serving cell; or,

and comparing the signal parameter of the serving cell with the second threshold, when the signal parameter of the serving cell is less than or equal to the second threshold, measuring the signal parameter of the non-serving cell with lower frequency priority according to a fourth period, determining that the signal parameter of the non-serving cell is greater than the fifth signal threshold, the signal parameter of the serving cell is less than the seventh signal threshold, and other conditions of cell reselection are met, and reselecting the non-serving cell.

Here, the first period and the second period may have different values, and the second period, the third period, and the fourth period may have the same value or different values.

Based on the method of the embodiment of the present invention, an embodiment of the present invention further provides a cell reselection apparatus, as shown in fig. 8, where the apparatus includes: a signal offset determining module 11 and an executing module 12; wherein,

a signal offset determining module 11, configured to determine a cell reselection signal offset according to a randomization algorithm;

and an executing module 12, configured to perform cell reselection measurement and/or cell reselection decision processing by using the cell reselection signal offset.

Specifically, the signal offset determining module 11 obtains a value range of cell reselection signal offset from a base station, for example, through broadcasting or unicasting, calculates a random number, and determines the cell reselection signal offset according to the value range and the random number; or,

the signal bias determining module 11 obtains a cell reselection signal bias and a corresponding bias probability from a base station, for example, through broadcasting or unicasting, calculates a random number, and determines to use the cell reselection signal bias according to the bias probability and the random number;

In an embodiment, the signal offset determining module 11 is specifically configured to determine the first signal offset and/or the third signal offset according to a randomization algorithm; and/or, correcting the first threshold according to the first signal offset to obtain a corrected second threshold; and/or correcting the third signal threshold according to the third signal offset to obtain a corrected fourth signal threshold.

Correspondingly, the executing module 12 is specifically configured to compare the signal parameter of the serving cell with a second threshold, and when the signal parameter of the serving cell is greater than the second threshold, if a non-serving cell with a frequency priority greater than the frequency priority of the serving cell exists, measure the signal parameter of the non-serving cell according to a first period, determine that the signal parameter of the non-serving cell is greater than a fourth signal threshold, and meet other conditions of cell reselection, and reselect to the non-serving cell;

or,

comparing the signal parameter of the serving cell with a second threshold, when the signal parameter of the serving cell is greater than the second threshold, if a non-serving cell with a frequency priority greater than that of the serving cell exists, measuring the signal parameter of the non-serving cell according to a first period, determining that the signal parameter of the non-serving cell is greater than a third signal threshold and meets other conditions of cell reselection, and reselecting the non-serving cell; or,

and comparing the signal parameter of the serving cell with the first threshold, when the signal parameter of the serving cell is greater than the first threshold, if a non-serving cell with the frequency priority greater than that of the serving cell exists, measuring the signal parameter of the non-serving cell according to a first period, determining that the signal parameter of the non-serving cell is greater than a fourth signal threshold, meeting other conditions of cell reselection, and reselecting the non-serving cell.

Or,

the execution module 12 is specifically configured to compare the signal parameter of the serving cell with a second threshold, and when the signal parameter of the serving cell is smaller than or equal to the second threshold, if a non-serving cell with a frequency priority greater than the frequency priority of the serving cell exists, measure the signal parameter of the non-serving cell according to a second period, determine that the signal parameter of the non-serving cell is greater than a fourth signal threshold and meets other conditions of cell reselection, and reselect the non-serving cell; or,

comparing the signal parameter of the serving cell with a second threshold, when the signal parameter of the serving cell is smaller than or equal to the second threshold, if a non-serving cell with a frequency priority greater than that of the serving cell exists, measuring the signal parameter of the non-serving cell according to a second period, determining that the signal parameter of the non-serving cell is greater than a third signal threshold and meets other conditions of cell reselection, and reselecting the non-serving cell; or,

and comparing the signal parameter of the serving cell with the first threshold, when the signal parameter of the serving cell is smaller than or equal to the first threshold, if a non-serving cell with the frequency priority larger than that of the serving cell exists, measuring the signal parameter of the non-serving cell according to a second period, determining that the signal parameter of the non-serving cell is larger than a fourth signal threshold and meets other conditions of cell reselection, and reselecting the non-serving cell.

In an embodiment, the signal offset determining module 11 is specifically configured to determine a first signal offset and/or a second signal offset according to a randomization algorithm, and/or correct a first threshold according to the first signal offset to obtain a corrected second threshold.

Correspondingly, the executing module 12 is specifically configured to compare the signal parameter of the serving cell with the second threshold, measure the signal parameter of the serving cell and the signal parameter of the non-serving cell having the same frequency priority according to a third period when the signal parameter of the serving cell is less than or equal to the second threshold, obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell, correct the first measurement result according to the first signal offset, obtain a corrected second measurement result, correct the third measurement result according to the second signal offset, obtain a corrected fourth measurement result, determine that the fourth measurement result is greater than the second measurement result, and meet other conditions of cell reselection, and reselect the non-serving cell; or,

comparing the signal parameters of the serving cell with the second threshold, when the signal parameters of the serving cell are less than or equal to the second threshold, measuring the signal parameters of the serving cell and the non-serving cell with the same frequency priority according to a third period to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell, correcting the first measurement result according to the first signal offset to obtain a corrected second measurement result, determining that the third measurement result is greater than the second measurement result and meets other conditions of cell reselection, and reselecting the non-serving cell; or,

and comparing the signal parameters of the serving cell with the first threshold, when the signal parameters of the serving cell are less than or equal to the first threshold, measuring the signal parameters of the serving cell and the non-serving cell with the same frequency priority according to a third period to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell, correcting the third measurement result according to the second signal offset to obtain a corrected fourth measurement result, determining that the fourth measurement result is greater than the first measurement result and meets other conditions of cell reselection, and reselecting the non-serving cell.

In this embodiment, the executing module 12 is further configured to determine that the fourth measurement result of the first non-serving cell is greater than the second measurement result and meets other conditions of cell reselection according to a high-to-low ranking of the fourth measurement results of the non-serving cells when there are multiple non-serving cells, and reselect to the first non-serving cell; or

When a plurality of non-service cells exist, according to the ranking of the fourth measurement result of each non-service cell from high to low, the fourth measurement result of the first non-service cell is determined to be larger than the first measurement result and meet other conditions of cell reselection, and the non-service cell ranked at the first position is reselected; or

And when a plurality of non-service cells exist, determining that the third measurement result of the first non-service cell is greater than the second measurement result and meets other conditions of cell reselection according to the third measurement results of the non-service cells sorted from high to low, and reselecting the non-service cell ranked at the first position.

In an embodiment, the signal offset determining module 11 is specifically configured to determine the first signal offset and/or the fourth signal offset according to a randomization algorithm; and/or, correcting the first threshold according to the first signal offset to obtain a corrected second threshold; and/or, correcting the seventh signal threshold according to the first signal offset to obtain a corrected eighth signal threshold; and/or correcting the fifth signal threshold according to the fourth signal offset to obtain a corrected sixth signal threshold.

Correspondingly, the executing module 12 is specifically configured to compare the signal parameter of the serving cell with the second threshold, measure the signal parameter of the non-serving cell with a lower frequency priority according to a fourth cycle when the signal parameter of the serving cell is less than or equal to the second threshold, determine that the signal parameter of the non-serving cell is greater than the sixth signal threshold, the signal parameter of the serving cell is less than the eighth signal threshold, and meet other conditions of cell reselection, and reselect the non-serving cell; or,

comparing the signal parameter of the serving cell with the second threshold, when the signal parameter of the serving cell is less than or equal to the second threshold, measuring the signal parameter of the non-serving cell with lower frequency priority according to a fourth period, determining that the signal parameter of the non-serving cell is greater than the fifth signal threshold, the signal parameter of the serving cell is less than the eighth signal threshold, and other conditions of cell reselection are met, and reselecting the non-serving cell; or,

comparing the signal parameter of the serving cell with the first threshold, when the signal parameter of the serving cell is smaller than or equal to the first threshold, measuring the signal parameter of the non-serving cell with lower frequency priority according to a fourth period, determining that the signal parameter of the non-serving cell is larger than the sixth signal threshold, the signal parameter of the serving cell is smaller than the eighth signal threshold, and other conditions of cell reselection are met, and reselecting the non-serving cell; or,

comparing the signal parameter of the serving cell with the first threshold, when the signal parameter of the serving cell is smaller than or equal to the first threshold, measuring the signal parameter of the non-serving cell with lower frequency priority according to a fourth period, determining that the signal parameter of the non-serving cell is larger than the sixth signal threshold, the signal parameter of the serving cell is smaller than the seventh signal threshold, and other conditions of cell reselection are met, and reselecting the non-serving cell; or,

In addition, in another embodiment of the present invention, a terminal is provided, where the terminal includes the above cell reselection apparatus.

The present invention will be described in detail below with reference to specific scenarios.

Fig. 9 is a schematic flowchart of a cell reselection with higher frequency priority according to an embodiment of the present invention, including:

step 501: the terminal obtains the value range of the cell reselection signal offset of each cell used for the pilot frequency cell reselection from the base station;

step 502: the terminal determines a first signal bias and a third signal bias according to the value range and the random number, wherein the value range obtained by the terminal can be two values of a minimum value and a maximum value, or only one value, when the value range obtained by the terminal is one value, the value range is between 0 and the value, the value can be a positive value or a negative value, for example, if the value range obtained by the terminal is 5, the value of the bias can be in a range of [0,5 ]; if the offset range obtained by the terminal is-5, the offset value can be in the range of [ -5,0 ]; the specification of the cell reselection signal offset value range in other embodiments is also similar, and will not be described in detail below.

For example: the terminal generates a random number random between [0,1], the value range of the first signal offset is [ A, B ], the value range of the third signal offset is [ C, D ], the determined first signal offset can be [ A + (B-A) random ], and the determined third signal offset can be [ C + (D-C) random ]; alternatively, if the range of the first signal offset is B and the range of the third signal offset is D, the determined first signal offset may be B × random and the determined third signal offset may be D × random.

Step 503: the terminal judges whether the serving cell signal parameter is greater than a second threshold (a first threshold + a first signal offset), if so, executes step 505; if not, go to step 504;

step 504: the terminal determines that the serving cell signal parameter is less than or equal to a second threshold, and executes step 505;

step 505: judging that a non-serving cell with a frequency priority greater than that of the serving cell exists, and executing step 506;

step 506: measuring the signal parameters of the non-serving cell, and measuring the signal parameters of the serving cell in different periods under the two conditions that the signal parameters of the serving cell are greater than or less than or equal to a second threshold;

Step 507: and determining that the signal parameter of the non-serving cell is greater than a fourth signal threshold (a third signal threshold + a third signal offset) and meets other conditions of cell reselection, and reselecting the non-serving cell.

Fig. 10 is a schematic flowchart of another embodiment of cell reselection with higher frequency priority, including:

step 601: the terminal obtains a first signal bias and a third signal bias of each cell for the pilot frequency cell reselection and corresponding bias probabilities from a base station;

step 602: the terminal determines to use the first signal bias and the third signal bias according to the bias probability and the random number;

specifically, the terminal generates a random number random between [0,1], determines whether the random number is less than the bias probability p, and if the random number random is less than the bias probability p, the terminal may determine the first signal bias and the third signal bias in one of the following manners:

the first method is as follows: determining a first signal offset as a first signal offset corresponding to the offset probability obtained from the base station; determining a third signal offset as a third signal offset corresponding to the offset probability obtained from the base station;

the second method comprises the following steps: determining a first signal bias as a first signal bias corresponding to the bias probability p obtained from the base station; determining a third signal bias as a third signal bias corresponding to the bias probability p obtained from the base station;

the third method comprises the following steps: determining a first signal offset as a first signal offset corresponding to the offset probability obtained from the base station, the random number random; and determining a third signal offset as the random number random corresponding to the offset probability obtained from the base station.

It should be noted that, in an embodiment, it may also be determined whether the random number random is greater than the offset probability p, and if the random number random is greater than the offset probability p, the terminal may also determine the first signal offset and the third signal offset in one of the manners described above.

Step 603: the terminal judges whether the serving cell signal parameter is greater than a second threshold (a first threshold + a first signal offset), if so, step 605 is executed; if not, go to step 604;

step 604: the terminal determines that the serving cell signal parameter is less than or equal to a second threshold, and executes step 605;

step 605: judging that a non-service cell with the frequency priority greater than that of the service cell exists, and executing step 606;

step 606: measuring the signal parameters of the non-serving cell, and measuring the signal parameters of the serving cell in different periods under the two conditions that the signal parameters of the serving cell are greater than or less than or equal to a second threshold;

Step 607: and determining that the signal parameter of the non-serving cell is greater than a fourth signal threshold (a third signal threshold + a third signal offset) and meets other conditions of cell reselection, and reselecting the non-serving cell.

Fig. 11 is a schematic flowchart of cell reselection for the same frequency priority according to an embodiment of the present invention, including:

step 701: the terminal obtains the value range of the cell reselection signal offset of each cell used for the pilot frequency cell reselection from the base station;

step 702: the terminal determines a first signal bias and a second signal bias according to the value range and the random number;

for example: the terminal generates a random number random between [0,1], the first signal offset has a value range of [ A, B ], the second signal offset has a value range of [ E, F ], and then the first signal offset is determined to be [ A + (B-A) random ], and the second signal offset is determined to be [ E + (F-E) random ].

Step 703: the terminal determines whether the serving cell signal parameter is greater than a second threshold (first threshold + first signal offset), and if so, performs step 708; if not, go to step 704;

step 704: the terminal determines that the serving cell signal parameter is less than or equal to a second threshold, and executes step 705;

step 705: measuring signal parameters of a serving cell and a non-serving cell with the same frequency priority according to a specified period to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell;

step 706: ordering the serving cells and the non-serving cells according to the second measurement result (the first measurement result + the first signal offset) and the fourth measurement result (the third measurement result + the second signal offset);

step 707: if the fourth measurement result is greater than the second measurement result and meets other conditions of cell reselection, reselecting the non-serving cell, and ending the process; if the fourth measurement result is smaller than the second measurement result, go to step 709.

Step 708: determining that no non-serving cell exists with a frequency priority greater than a frequency priority of the serving cell;

step 709: and continuing to reside in the serving cell.

Fig. 12 is a schematic flowchart of another cell reselection to the same frequency priority according to an embodiment of the present invention, including:

step 801: a terminal obtains a first signal bias and a second signal bias of each cell for reselecting the pilot frequency cell and corresponding bias probability from a base station;

step 802: the terminal determines to use the first signal bias and the second signal bias according to the bias probability and the random number;

specifically, the terminal generates a random number random between [0,1], determines whether the random number is less than the bias probability p, and if the random number random is less than the bias probability p, the terminal may determine the first signal bias and the second signal bias in one of the following manners:

the first method is as follows: determining a first signal offset as a first signal offset corresponding to the offset probability obtained from the base station; determining a second signal offset as a second signal offset corresponding to the offset probability obtained from the base station;

the second method comprises the following steps: determining a first signal bias as a first signal bias corresponding to the bias probability p obtained from the base station; determining a second signal bias as a second signal bias corresponding to the bias probability p obtained from the base station;

the third method comprises the following steps: determining a first signal offset as a first signal offset corresponding to the offset probability obtained from the base station, the random number random; and determining a second signal offset as a second signal offset corresponding to the offset probability obtained from the base station.

Step 803: the terminal judges whether the serving cell signal parameter is greater than a second threshold (a first threshold + a first signal offset), if so, step 808 is executed; if not, go to step 804;

step 804: the terminal determines that the serving cell signal parameter is less than or equal to the second threshold, and executes step 805;

step 805: measuring signal parameters of a serving cell and a non-serving cell with the same frequency priority according to a specified period to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell;

step 806: ordering the serving cells and the non-serving cells according to the second measurement result (the first measurement result + the first signal offset) and the fourth measurement result (the third measurement result + the second signal offset);

step 807: if the fourth measurement result is greater than the second measurement result and meets other conditions of cell reselection, reselecting the non-serving cell, and ending the process; if the fourth measurement result is less than the second measurement result, step 809 is performed.

Step 808: determining that no non-serving cell exists with a frequency priority greater than a frequency priority of the serving cell;

step 809: and continuing to reside in the serving cell.

Fig. 13 is a schematic flowchart of cell reselection with lower frequency priority according to an embodiment of the present invention, including:

step 901: the terminal obtains the value range of the cell reselection signal offset of each cell used for the pilot frequency cell reselection from the base station;

step 902: the terminal determines a first signal bias and a fourth signal bias according to the value range and the random number;

for example: the terminal generates a random number random between [0,1], the first signal offset has a value range of [ A, B ], the fourth signal offset has a value range of [ G, H ], and then the first signal offset is determined to be [ A + (B-A) random ], and the fourth signal offset is determined to be [ G + (H-G) random ].

Step 903: the terminal judges whether the serving cell signal parameter is greater than a second threshold (the first threshold + the first signal offset), if so, step 907 is executed; if not, go to step 904;

step 904: the terminal determines that the serving cell signal parameter is less than or equal to a second threshold, and executes step 905;

step 905: determining that a frequency point with lower frequency priority exists, and measuring signal parameters of a non-service cell on the frequency point with the lower frequency priority according to a specified period;

step 906: determining that the signal parameter of the non-serving cell is greater than a sixth signal threshold (a fifth signal threshold + a fourth signal offset), the signal parameter of the serving cell is less than an eighth signal threshold (a seventh signal threshold + a first signal offset), and other conditions of cell reselection are met, reselecting the non-serving cell, and ending the process; if the above condition is not satisfied, go to step 908; the fifth signal threshold represents a signal threshold for reselecting the different-frequency adjacent cell with lower frequency priority; the seventh signal threshold characterizes a signal threshold of a serving cell in inter-frequency cell reselection with a lower frequency priority.

Step 907: determining that no non-serving cell exists with a frequency priority greater than a frequency priority of the serving cell;

step 908: and continuing to reside in the serving cell.

Fig. 14 is a schematic flowchart of another cell reselection with lower frequency priority according to an embodiment of the present invention, including:

step 1001: the terminal obtains a first signal bias and a fourth signal bias of each cell for the pilot frequency cell reselection and corresponding bias probabilities from a base station;

step 1002: the terminal determines to use the first signal bias and the fourth signal bias according to the bias probability and the random number;

specifically, the terminal generates a random number random between [0,1], determines whether the random number is less than the bias probability p, and if the random number random is less than the bias probability p, the terminal may determine the first signal bias and the fourth signal bias in one of the following manners:

the first method is as follows: determining a first signal offset as a first signal offset corresponding to the offset probability obtained from the base station; determining a fourth signal offset as a fourth signal offset corresponding to the offset probability obtained from the base station;

the second method comprises the following steps: determining a first signal bias as a first signal bias corresponding to the bias probability p obtained from the base station; determining a fourth signal bias as a fourth signal bias corresponding to the bias probability obtained from the base station;

the third method comprises the following steps: determining a first signal offset as a first signal offset corresponding to the offset probability obtained from the base station, the random number random; and determining a fourth signal offset as a fourth signal offset corresponding to the offset probability obtained from the base station.

Step 1003: the terminal judges whether the serving cell signal parameter is greater than a second threshold (a first threshold + a first signal offset), if so, step 1007 is executed; if not, go to step 1004;

step 1004: the terminal determines that the serving cell signal parameter is less than or equal to the second threshold, and executes step 1005;

step 1005: determining that a frequency point with lower frequency priority exists, and measuring signal parameters of a non-service cell on the frequency point with the lower frequency priority according to a specified period;

step 1006: determining that the signal parameter of the non-serving cell is greater than a sixth signal threshold (a fifth signal threshold + a fourth signal offset), the signal parameter of the serving cell is less than an eighth signal threshold (a seventh signal threshold + a first signal offset), and other conditions of cell reselection are met, reselecting the non-serving cell, and ending the process; if the above condition is not satisfied, go to step 1008; the fifth signal threshold represents a signal threshold for reselecting the different-frequency adjacent cell with lower frequency priority; the seventh signal threshold characterizes a signal threshold of a serving cell in inter-frequency cell reselection with a lower frequency priority.

Step 1007: determining that no non-serving cell exists with a frequency priority greater than a frequency priority of the serving cell;

step 1008: and continuing to reside in the serving cell.

It should be noted that the embodiments described in fig. 9 to 14 are directed to cell reselection, and the same applies to the case of frequency point reselection, and the processing in frequency point reselection is consistent with the processing procedure of cell reselection.

A lower frequency priority cell reselection is exemplified below.

As shown in fig. 15, frequency 1 of cell (cell)1 is high priority, serving cells of User Equipment (UE)1, UE2, UE3, and UE4 are already currently in a heavy load state, frequency 2 of cell 2 is medium priority, currently under medium load, frequency 3 of cell 3 is low priority, and currently under light load; the cell reselection signal offset ranges and threshold values configured by the base station for each cell are shown in table 1:

TABLE 1

In this embodiment, only the cell reselection reception power value Srxlev is considered, and actually, the cell reselection signal quality value Squal or the cell signal-to-noise ratio may also be used, as shown in table 2:

TABLE 2

Wherein each UE generates the offset1 according to a randomization method_cell,UEFor example, the UE generates a [0,1]]Random number random, offset1 between_cell,UE＝offset1_cell*random，offset4_cell,UE＝offset4_cell*random。

Existing mechanisms (UE1 and UE 2):

for UE1 and UE2, (Srxlev)_{UE1/UE2,cell1}＝12)>(first threshold 10), according to existing mechanisms, UE1 and UE2 may not initiate measurements on lower priority frequency 2/cell 2 and frequency 3/cell 3, and remain on cell 1.

Method one of the invention (UE 1):

for UE1, according to the method of the present invention, (Srxlev)_UE1，cell1＝12)<(first threshold + offset1_cell1,UE1) 10+ 5-15, the UE1 initiates measurements on lower priority frequency 2/cell 2 and frequency 3/cell 3. Wherein, the UE1 generates the offset1 according to a randomization method_cell1,UE1，offset4_cell2,UE1And offset4_cell3,UE1。

For cell 2, the UE1 makes a cell reselection decision according to the following conditions:

1)(Srxlev_UE1，cell2＝12)>(fifth signal threshold + fourth signal offset) ═ 8+ (-4)) -4;

2)(Srxlev_UE1，cell1＝12)<(seventh signal threshold + first signal offset) ═ 15;

3) other conditions for cell reselection as specified in the protocol;

the UE1 reselects to cell 2.

Method one of the invention (UE 2):

for UE2, according to the method of the present invention, (Srxlev)_UE2，cell1＝12)>(first threshold + offset1_cell1,UE2) 10+ 1-11, the UE2 does not initiate measurements on lower priority frequencies 2/cell 2 and 3/cell 3.

Existing mechanism (UE 3):

for UE3, (Srxlev)_UE3,cell1＝7)<The first threshold of 10), the UE3 may initiate measurements on lower priority frequency 2/cell 2 and frequency 3/cell 3 in accordance with existing mechanisms.

However, for cell 2, (Srxlev)_UE3,cell2＝7)<(fifth signal threshold of 8), the UE3 cannot reselect to cell 2 according to the existing mechanism.

For cell 3, (Srxlev)_UE3,cell3＝7)<(fifth threshold of 8), the UE3 also cannot reselect to cell 3 according to the existing mechanism.

Method one of the invention (UE 3):

for UE3, according to the method of the present invention, (Srxlev)_UE3，cell1＝7)<(first threshold + offset1_cell1,UE3) The UE3 may still initiate measurements on lower priority frequencies 2/cell 2 and 3/cell 3, 18.

For cell 2, the UE3 makes a cell reselection decision according to the following conditions:

1)(Srxlev_UE3，cell2＝7)>(fifth signal threshold + fourth signal offset) ═ 8+ (-5)) -3;

2)(Srxlev_UE3，cell2＝7)<(seventh signal threshold + first signal offset) ═ 15;

3) other conditions for cell reselection as specified in the protocol;

the UE3 reselects to cell 2.

Existing mechanism (UE 4):

for UE4, (Srxlev)_UE4,cell1＝4)<(first threshold 10), the UE4 may initiate measurements on lower priority frequency 2/cell 2 and frequency 3/cell 3 as per the existing mechanism.

However, for cell 2, (Srxlev)_UE4,cell2＝4)<(fifth signal threshold of 8), the UE4 cannot reselect to cell 2 according to the existing mechanism.

For cell 3, (Srxlev)_UE4,cell3＝4)<(fifth signal threshold of 8), the UE4 cannot reselect to cell 3 according to the existing mechanism.

Method one of the invention (UE 4):

for UE4, according to the method of the present invention, (Srxlev)_UE4，cell1＝4)<(first threshold + offset1_cell1,UE4) The UE4 may still initiate measurements on lower priority frequencies 2/cell 2 and 3/cell 3, 15.

For cell 2, the UE4 makes a cell reselection decision according to the following conditions:

(Srxlev_UE4，cell24 (fifth signal threshold + fourth signal offset) ═ 8+ (-4)) -4;

then UE4 cannot reselect to cell 2 and UE4 further determines cell 3;

for cell 3, the UE4 makes a cell reselection decision according to the following conditions:

1)(Srxlev_UE4，cell3＝4)>(fifth signal threshold + fourth signal offset) ═ 8+ (-7)) ═ 1;

2)(Srxlev_UE4，cell2＝4)<(seventh signal threshold + first signal offset) ═ 15;

3) other conditions for cell reselection as specified in the protocol;

the UE4 reselects to cell 3.

Through the above process, a more balanced UE distribution as shown in fig. 16 can be achieved, thereby achieving:

1) the UE is not concentrated in the cell 1 with high frequency priority, and the UE is distributed in each cell;

2) terminals (UE1 and UE2) with the same signal conditions may also camp on different cells;

3) the UE is allowed to camp on a cell of a low priority frequency bin.

Method two of the invention

The UE determines the signal offset it uses in the following manner and performs cell reselection related operations in the manner of method one.

As shown in table 3, the base station provides only one probability p that applies to all signal offsets.

TABLE 3

The signal offsets used by UE1 and UE2 are shown in table 4.

TABLE 4

Table 5 shows the probabilities provided by the base station for each signal offset:

TABLE 5

The signal offsets used by UE1 and UE2 are shown in table 6:

TABLE 6

Assume that the first and fourth signal offsets determined by UE1 and UE2, and the measured RSRP of each cell, as per the above method, are shown in table 7:

TABLE 7

UE1 and UE2 may generate the same cell reselection procedure as the method of the present invention.

In summary, in the embodiment of the present invention, the terminal determines the cell reselection signal offset according to the randomization algorithm, so that the problem that the terminal is concentrated on a specific carrier or a cell in an idle-state cell reselection mechanism can be avoided, more balanced idle-state cell distribution is achieved, ping-pong of cell reselection is not caused, and increase in power consumption of the terminal and reduction in user experience are avoided.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.

Claims

1. A method of cell reselection, the method comprising:

the terminal determines the cell reselection signal offset according to a randomization algorithm, and measures the cell reselection and/or judges the cell reselection by utilizing the cell reselection signal offset;

the terminal determining the cell reselection signal offset according to the randomization algorithm comprises:

the terminal obtains a value range of cell reselection signal bias, calculates a random number, and determines the cell reselection signal bias according to the value range and the random number; or

the terminal obtains cell reselection signal bias and corresponding bias probability, calculates a random number, and determines the cell reselection signal bias according to the bias probability and the random number;

the cell reselection signal biasing comprises: a first signal offset, and/or a second signal offset, wherein,

the first signal bias is used for correcting a first measurement result to obtain a corrected second measurement result, and the second measurement result is used for judging the reselection of the pilot frequency cells with the same frequency priority; the first measurement result represents the measurement result of the serving cell selected by the pilot frequency cell reselection with the same frequency priority;

and/or the second signal offset is used for correcting a third measurement result to obtain a corrected fourth measurement result, and the fourth measurement result is used for judging the reselection of the pilot frequency cells with the same frequency priority; the third measurement result represents the measurement result of the non-serving cell selected by the pilot frequency cell reselection with the same frequency priority.

2. The method of claim 1, wherein the first signal offset is used to modify a first threshold to obtain a modified second threshold, and the second threshold is used to make a decision for starting inter-frequency cell reselection measurement; the first threshold represents a threshold for starting pilot frequency measurement.

3. The method of claim 1, wherein the first signal offset is used to modify a seventh signal threshold to obtain an eighth modified signal threshold, and wherein the eighth signal threshold is used to make a decision for inter-frequency cell reselection with lower frequency priority; the seventh signal threshold characterizes a signal threshold of a serving cell in inter-frequency cell reselection with a lower frequency priority.

4. The method according to any one of claims 1 to 3, wherein the cell reselection signal offset comprises a third signal offset, and the third signal offset is used to modify a third signal threshold to obtain a modified fourth signal threshold, and the fourth signal threshold is used to perform a decision on inter-frequency cell reselection with higher frequency priority; and the third signal threshold represents a signal threshold for reselecting the different-frequency adjacent cell with higher frequency priority.

5. The method according to any one of claims 1 to 3, wherein the cell reselection signal offset comprises a fourth signal offset, and the fourth signal offset is used to modify a fifth signal threshold to obtain a modified sixth signal threshold, and the sixth signal threshold is used to perform a pilot cell reselection decision with a lower frequency priority; and the fifth signal threshold represents a signal threshold for reselecting the different-frequency adjacent cell with lower frequency priority.

6. The method of claim 4, wherein the terminal determining the cell reselection signal offset according to a randomization algorithm comprises:

the terminal determines a first signal offset and/or a third signal offset according to a randomization algorithm; and/or

Correcting the first threshold according to the first signal offset to obtain a corrected second threshold; and/or correcting the third signal threshold according to the third signal offset to obtain a corrected fourth signal threshold.

7. The method according to claim 6, wherein the measurement of cell reselection and/or the decision process of cell reselection using the cell reselection signal offset comprises:

comparing the signal parameter of the serving cell with a second threshold, when the signal parameter of the serving cell is greater than the second threshold, if a non-serving cell with a frequency priority greater than that of the serving cell exists, measuring the signal parameter of the non-serving cell according to a first period, determining that the signal parameter of the non-serving cell is greater than a fourth signal threshold and meets the conditions specified by 3GPP specifications of cell reselection, and reselecting the non-serving cell; or,

comparing the signal parameter of the serving cell with a second threshold, when the signal parameter of the serving cell is greater than the second threshold, if a non-serving cell with a frequency priority greater than that of the serving cell exists, measuring the signal parameter of the non-serving cell according to a first period, determining that the signal parameter of the non-serving cell is greater than a third signal threshold and meets the conditions specified by 3GPP specifications of cell reselection, and reselecting the non-serving cell; or,

and comparing the signal parameter of the serving cell with the first threshold, when the signal parameter of the serving cell is greater than the first threshold, if a non-serving cell with the frequency priority greater than that of the serving cell exists, measuring the signal parameter of the non-serving cell according to a first period, determining that the signal parameter of the non-serving cell is greater than a fourth signal threshold and meets the condition specified by the 3GPP specification of cell reselection, and reselecting the non-serving cell.

8. The method according to claim 6, wherein the measurement of cell reselection and/or the decision process of cell reselection using the cell reselection signal offset comprises:

comparing the signal parameter of the serving cell with a second threshold, when the signal parameter of the serving cell is smaller than or equal to the second threshold, if a non-serving cell with a frequency priority greater than that of the serving cell exists, measuring the signal parameter of the non-serving cell according to a second period, determining that the signal parameter of the non-serving cell is greater than a fourth signal threshold and meets the condition specified by the 3GPP specification of cell reselection, and reselecting the non-serving cell; or,

comparing the signal parameter of the serving cell with a second threshold, when the signal parameter of the serving cell is smaller than or equal to the second threshold, if a non-serving cell with a frequency priority greater than that of the serving cell exists, measuring the signal parameter of the non-serving cell according to a second period, determining that the signal parameter of the non-serving cell is greater than a third signal threshold and meets the condition specified by the 3GPP specification of cell reselection, and reselecting the non-serving cell; or,

and comparing the signal parameter of the serving cell with the first threshold, when the signal parameter of the serving cell is smaller than or equal to the first threshold, if a non-serving cell with the frequency priority larger than that of the serving cell exists, measuring the signal parameter of the non-serving cell according to a second period, determining that the signal parameter of the non-serving cell is larger than a fourth signal threshold and meets the condition specified by the 3GPP specification of cell reselection, and reselecting the non-serving cell.

9. The method of any of claims 1-3, wherein the terminal determining the cell reselection signal offset according to a randomization algorithm comprises:

the terminal determines a first signal offset and/or a second signal offset according to a randomization algorithm; and/or

And correcting the first threshold according to the first signal offset to obtain a corrected second threshold.

10. The method according to claim 9, wherein the measurement of cell reselection and/or the decision process of cell reselection using the cell reselection signal offset comprises:

comparing the signal parameters of the serving cell with the second threshold, when the signal parameters of the serving cell are less than or equal to the second threshold, measuring the signal parameters of the serving cell and the non-serving cell with the same frequency priority according to a third period to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell, correcting the first measurement result according to the first signal offset to obtain a corrected second measurement result, correcting the third measurement result according to the second signal offset to obtain a corrected fourth measurement result, determining that the fourth measurement result is greater than the second measurement result and meets the conditions specified by the 3GPP specification of cell reselection, and reselecting the non-serving cell; or,

comparing the signal parameters of the serving cell with the second threshold, when the signal parameters of the serving cell are less than or equal to the second threshold, measuring the signal parameters of the serving cell and the non-serving cell with the same frequency priority according to a third period to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell, correcting the first measurement result according to the first signal offset to obtain a corrected second measurement result, determining that the third measurement result is greater than the second measurement result and meets the conditions specified by the 3GPP specification of cell reselection, and reselecting the non-serving cell; or,

and comparing the signal parameters of the serving cell with the first threshold, when the signal parameters of the serving cell are less than or equal to the first threshold, measuring the signal parameters of the serving cell and the non-serving cell with the same frequency priority according to a third period to obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell, correcting the third measurement result according to the second signal offset to obtain a corrected fourth measurement result, determining that the fourth measurement result is greater than the first measurement result and meets the conditions specified by the 3GPP specification of cell reselection, and reselecting the non-serving cell.

11. The method of claim 10, further comprising:

when a plurality of non-service cells exist, according to the ranking of the fourth measurement result of each non-service cell from high to low, the fourth measurement result of the first non-service cell is determined to be larger than the second measurement result and meets the conditions specified by the 3GPP specification of cell reselection, and the non-service cell ranked at the first position is reselected; or

When a plurality of non-service cells exist, according to the ranking of the fourth measurement result of each non-service cell from high to low, the fourth measurement result of the first non-service cell is determined to be larger than the first measurement result and meets the conditions specified by the 3GPP specification of cell reselection, and the non-service cell ranked at the first position is reselected; or

And when a plurality of non-service cells exist, according to the third measurement results of the non-service cells sorted from high to low, determining that the third measurement result of the first non-service cell is greater than the second measurement result and meets the conditions specified by the 3GPP specification for cell reselection, and reselecting the non-service cell ranked at the first position.

12. The method of claim 5, wherein the terminal determining the cell reselection signal offset according to a randomization algorithm comprises:

the terminal determines a first signal offset and/or a fourth signal offset according to a randomization algorithm; and/or

Correcting the first threshold according to the first signal offset to obtain a corrected second threshold; and/or, correcting the seventh signal threshold according to the first signal offset to obtain a corrected eighth signal threshold; and/or correcting the fifth signal threshold according to the fourth signal offset to obtain a corrected sixth signal threshold.

13. The method according to claim 12, wherein the measurement of cell reselection and/or the decision process of cell reselection using the cell reselection signal offset comprises:

comparing the signal parameter of the serving cell with the second threshold, when the signal parameter of the serving cell is less than or equal to the second threshold, measuring the signal parameter of the non-serving cell with lower frequency priority according to a fourth period, determining that the signal parameter of the non-serving cell is greater than the sixth signal threshold, the signal parameter of the serving cell is less than the eighth signal threshold, and the condition specified by the 3GPP specification of cell reselection is met, and reselecting the non-serving cell; or,

comparing the signal parameter of the serving cell with the second threshold, when the signal parameter of the serving cell is less than or equal to the second threshold, measuring the signal parameter of the non-serving cell with lower frequency priority according to a fourth period, determining that the signal parameter of the non-serving cell is greater than the fifth signal threshold, the signal parameter of the serving cell is less than the eighth signal threshold, and the condition specified by the 3GPP specification of cell reselection is met, and reselecting the non-serving cell; or,

comparing the signal parameter of the serving cell with the first threshold, when the signal parameter of the serving cell is smaller than or equal to the first threshold, measuring the signal parameter of the non-serving cell with lower frequency priority according to a fourth period, determining that the signal parameter of the non-serving cell is larger than the sixth signal threshold, the signal parameter of the serving cell is smaller than the eighth signal threshold, and the condition specified by the 3GPP specification of cell reselection is met, and reselecting the non-serving cell; or,

comparing the signal parameter of the serving cell with the first threshold, when the signal parameter of the serving cell is smaller than or equal to the first threshold, measuring the signal parameter of the non-serving cell with lower frequency priority according to a fourth period, determining that the signal parameter of the non-serving cell is larger than the sixth signal threshold, the signal parameter of the serving cell is smaller than the seventh signal threshold and meets the conditions specified by the 3GPP specification of cell reselection, and reselecting the non-serving cell; or,

and comparing the signal parameter of the serving cell with the second threshold, when the signal parameter of the serving cell is less than or equal to the second threshold, measuring the signal parameter of the non-serving cell with lower frequency priority according to a fourth period, determining that the signal parameter of the non-serving cell is greater than the fifth signal threshold, the signal parameter of the serving cell is less than the seventh signal threshold and meets the conditions specified by the 3GPP specification of cell reselection, and reselecting the non-serving cell.

14. A cell reselection apparatus, comprising: the signal offset determining module and the executing module; wherein,

the execution module is used for carrying out cell reselection measurement and/or cell reselection judgment processing by utilizing the cell reselection signal bias;

the signal offset determining module is specifically configured to obtain a value range of cell reselection signal offset, calculate a random number, and determine the cell reselection signal offset according to the value range and the random number; or

The signal offset determining module is specifically configured to obtain a cell reselection signal offset and a corresponding offset probability, calculate a random number, and determine the cell reselection signal offset according to the offset probability and the random number;

15. The apparatus of claim 14, wherein the first signal offset is used to modify a first threshold to obtain a modified second threshold, and the second threshold is used to make a decision for starting inter-frequency cell reselection measurement; the first threshold represents a threshold for starting pilot frequency measurement.

16. The apparatus of claim 14, wherein the first signal offset is configured to modify a seventh signal threshold to obtain an eighth modified signal threshold, and wherein the eighth signal threshold is configured to perform a decision for inter-frequency cell reselection with lower frequency priority; the seventh signal threshold characterizes a signal threshold of a serving cell in inter-frequency cell reselection with a lower frequency priority.

17. The apparatus according to any one of claims 14 to 16, wherein the cell reselection signal offset comprises a third signal offset, and the third signal offset is used to modify a third signal threshold to obtain a modified fourth signal threshold, and the fourth signal threshold is used to make a decision on inter-frequency cell reselection with higher frequency priority; and the third signal threshold represents a signal threshold for reselecting the different-frequency adjacent cell with higher frequency priority.

18. The apparatus according to any one of claims 14 to 16, wherein the cell reselection signal offset comprises a fourth signal offset, and the fourth signal offset is used to modify a fifth signal threshold to obtain a modified sixth signal threshold, and the sixth signal threshold is used to make a decision on inter-frequency cell reselection with lower frequency priority; and the fifth signal threshold represents a signal threshold for reselecting the different-frequency adjacent cell with lower frequency priority.

19. The apparatus according to claim 17, wherein the signal offset determining module is specifically configured to determine the first signal offset and/or the third signal offset according to a randomization algorithm; and/or, correcting the first threshold according to the first signal offset to obtain a corrected second threshold; and/or correcting the third signal threshold according to the third signal offset to obtain a corrected fourth signal threshold.

20. The apparatus of claim 19, wherein the performing module is specifically configured to compare the serving cell signal parameter with a second threshold, and when the serving cell signal parameter is greater than the second threshold, if there is a non-serving cell with a frequency priority greater than that of the serving cell, measure the signal parameter of the non-serving cell according to a first period, determine that the signal parameter of the non-serving cell is greater than a fourth signal threshold and meets a condition specified by a 3GPP specification for cell reselection, and reselect to the non-serving cell;

or,

21. The apparatus of claim 19, wherein the performing module is specifically configured to compare the serving cell signal parameter with a second threshold, and when the serving cell signal parameter is smaller than or equal to the second threshold, if there is a non-serving cell with a frequency priority greater than the frequency priority of the serving cell, measure the signal parameter of the non-serving cell according to a second period, determine that the signal parameter of the non-serving cell is greater than a fourth signal threshold and meets a condition specified by a 3GPP specification for cell reselection, and reselect to the non-serving cell; or,

22. The apparatus according to any of the claims 14 to 16, wherein the signal offset determining module is specifically configured to determine the first signal offset and/or the second signal offset according to a randomization algorithm; and/or correcting the first threshold according to the first signal offset to obtain a corrected second threshold.

23. The apparatus of claim 22, wherein the execution module is specifically configured to compare signal parameters of a serving cell with a second threshold, measure signal parameters of a serving cell and a non-serving cell with the same frequency priority according to a third period when the signal parameter of the serving cell is smaller than or equal to the second threshold, obtain a first measurement result of the serving cell and a third measurement result of the non-serving cell, correct the first measurement result according to the first signal offset, obtain a corrected second measurement result, correct the third measurement result according to the second signal offset, obtain a corrected fourth measurement result, determine that the fourth measurement result is greater than the second measurement result and meets a condition specified by a 3GPP specification for cell reselection, and reselect the non-serving cell; or,

24. The apparatus of claim 23, wherein the performing module is further configured to determine, when there are multiple non-serving cells, that the fourth measurement result of the first non-serving cell is greater than the second measurement result and meets a condition specified by a 3GPP specification for cell reselection according to a high-to-low ranking of the fourth measurement results of the non-serving cells, and reselect to the first non-serving cell; or

25. The apparatus according to claim 18, wherein the signal offset determining module is configured to determine the first signal offset and/or the fourth signal offset according to a randomization algorithm; and/or, correcting the first threshold according to the first signal offset to obtain a corrected second threshold; and/or, correcting the seventh signal threshold according to the first signal offset to obtain a corrected eighth signal threshold; and/or correcting the fifth signal threshold according to the fourth signal offset to obtain a corrected sixth signal threshold.

26. The apparatus of claim 25, wherein the performing module is specifically configured to compare the serving cell signal parameter with a second threshold, measure a signal parameter of a non-serving cell with a lower frequency priority according to a fourth cycle when the serving cell signal parameter is smaller than or equal to the second threshold, determine that the signal parameter of the non-serving cell is greater than the sixth signal threshold, the serving cell signal parameter is smaller than the eighth signal threshold, and meet a condition specified by a 3GPP specification for cell reselection, and reselect to the non-serving cell; or,

27. A terminal, characterized in that it comprises an arrangement according to any of claims 14 to 26.