CN110831084B

CN110831084B - Cell reselection method and terminal

Info

Publication number: CN110831084B
Application number: CN201810911423.7A
Authority: CN
Inventors: 梁敬; 陈力
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2021-09-07
Anticipated expiration: 2038-08-10
Also published as: CN110831084A

Abstract

The invention discloses a cell reselection method, a terminal and network equipment, wherein the method comprises the following steps: correcting the priority of the adjacent cell to obtain a target priority; and executing a cell reselection process according to the target priority and the reselection condition reselected to the adjacent cell. The embodiment of the invention can correct the priority of the adjacent cell, and determine whether the adjacent cell is reselected according to the corrected target priority and the reselection condition of the reselected adjacent cell, thereby ensuring the quality of the reselected cell to meet the resident requirement and avoiding the problem of unstable terminal connection after the cell is reselected.

Description

Cell reselection method and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a cell reselection method and a terminal.

Background

In a mobile communication system, when a terminal initially accesses, since the terminal does not know in advance which Radio Frequency channel (RF channel) is suitable for access, the terminal scans (scan) all RF channels one by one according to the terminal capability to find a suitable (able) cell. In each scanned carrier frequency, the terminal only needs to search the cell with the strongest signal quality, once a suitable cell is found, the cell is selected to access and reside, and the initial cell selection process is stopped, and if the unscanned RF channel still exists at this time, the terminal does not need to scan the unscanned RF channel any more.

When the terminal resides in the serving cell, the terminal may sequentially evaluate whether each frequency point has a suitable reselected neighboring cell based on the priority order of the frequency points provided by the network device, and if it is detected that there is a suitable neighboring cell for reselection, may initiate a reselection process to the cell on the frequency point.

In inter-system cell reselection, the number and value of cell priorities may be different for different systems, for example, fifth generation (5)^thGeneration, 5G) mobile communication system, or New Radio (NR) system, may operate in the high frequency band of 6-100GHZ, and therefore, it needs to rely on multiple beams to ensure coverage of common control channels, even data channels. For 5 operating at different frequenciesThe configurable number of beams of the G NR cells may be different, so that the frequency point priorities of the 5G NR cells may be different from the frequency point priorities of Long Term Evolution (LTE) system messages, and the priority value divisions may also be different. If the priority value is directly compared, the actual priority of the inter-system cell may not be determined, which may cause the problems of poor quality of the reselected cell and unstable terminal connection.

Disclosure of Invention

The embodiment of the invention provides a cell reselection method and a terminal, which aim to solve the problems of poor quality of reselected cells and unstable terminal connection when cells of different systems are reselected.

In a first aspect, an embodiment of the present invention provides a cell reselection method, applied to a terminal side, including:

correcting the priority of the adjacent cell to obtain a target priority;

and executing a cell reselection process according to the target priority and the reselection condition reselected to the adjacent cell.

In a second aspect, an embodiment of the present invention further provides a terminal, including:

the correction module is used for correcting the priority of the adjacent cell to obtain a target priority;

and the reselection module is used for executing a cell reselection process according to the target priority and the reselection condition reselected to the adjacent cell.

In a third aspect, an embodiment of the present invention provides a terminal, where the terminal includes a processor, a memory, and a computer program stored in the memory and running on the processor, and when the computer program is executed by the processor, the steps of the cell reselection method are implemented.

In a fourth aspect, an embodiment of the present invention provides a cell reselection method, applied to a network device side, including:

transmitting reselection information related to cell reselection, wherein the reselection information comprises at least one of:

mapping relationship information for indicating a priority correspondence relationship between the inter-system cells,

priority comparison threshold information, an

Priority adjustment parameter information.

In a fifth aspect, an embodiment of the present invention provides a network device, including:

a transmitting module, configured to transmit reselection information related to cell reselection, wherein the reselection information includes at least one of the following information:

priority comparison threshold information, an

Priority adjustment parameter information.

In a sixth aspect, an embodiment of the present invention provides a network device, where the network device includes a processor, a memory, and a computer program stored in the memory and running on the processor, and the computer program, when executed by the processor, implements the steps of the cell reselection method described above.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the cell reselection method for a terminal or a network device are implemented.

Thus, by adopting the technical scheme, the embodiment of the invention can correct the priority of the adjacent cell, and determine whether to reselect the adjacent cell according to the corrected target priority and the reselection condition of the reselected adjacent cell, so that the quality of the reselected cell can meet the residence requirement, and the problem of unstable terminal connection after cell reselection is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 shows a block diagram of a mobile communication system to which an embodiment of the present invention is applicable;

fig. 2 is a flowchart illustrating a cell reselection method according to an embodiment of the present invention;

fig. 3 is a schematic block diagram of a terminal according to an embodiment of the present invention;

FIG. 4 shows a block diagram of a terminal of an embodiment of the invention;

fig. 5 is a flowchart illustrating a cell reselection method of a network device according to an embodiment of the present invention;

FIG. 6 is a block diagram of a network device according to an embodiment of the present invention;

fig. 7 shows a block diagram of a network device of an embodiment of the invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects.

The techniques described herein are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes the NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.

The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Referring to fig. 1, fig. 1 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a terminal Device or a User Equipment (UE), where the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and the specific type of the terminal 11 is not limited in the embodiment of the present invention. The network device 12 may be a Base Station or a core network, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5G NR NB, etc.), or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), wherein the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, it should be noted that, in the embodiment of the present invention, only the Base Station in the NR system is taken as an example, but does not limit the specific type of base station.

The base stations may communicate with the terminals 11 under the control of a base station controller, which may be part of the core network or some of the base stations in various examples. Some base stations may communicate control information or user data with the core network through a backhaul. In some examples, some of the base stations may communicate with each other, directly or indirectly, over backhaul links, which may be wired or wireless communication links. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multi-carrier transmitter can transmit modulated signals on the multiple carriers simultaneously. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal may be transmitted on a different carrier and may carry control information (e.g., reference signals, control channels, etc.), overhead information, data, and so on.

The base station may communicate wirelessly with the terminal 11 via one or more access point antennas. Each base station may provide communication coverage for a respective coverage area. The coverage area of an access point may be divided into sectors that form only a portion of the coverage area. A wireless communication system may include different types of base stations (e.g., macro, micro, or pico base stations). The base stations may also utilize different radio technologies, such as cellular or WLAN radio access technologies. The base stations may be associated with the same or different access networks or operator deployments. The coverage areas of different base stations (including coverage areas of base stations of the same or different types, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks) may overlap.

The communication links in a wireless communication system may comprise an Uplink for carrying Uplink (UL) transmissions (e.g., from terminal 11 to network device 12) or a Downlink for carrying Downlink (DL) transmissions (e.g., from network device 12 to terminal 11). The UL transmission may also be referred to as reverse link transmission, while the DL transmission may also be referred to as forward link transmission.

As shown in fig. 2, a cell reselection method according to an embodiment of the present invention is applied to a terminal side, and includes the following steps:

step 21: and correcting the priority of the adjacent cell to obtain the target priority.

Because the frequency point priority number and the priority value division of different systems are possibly different, in order to avoid the problem that the divided priorities cannot accurately represent the actual priorities of the cells, the terminal can correct the priorities of the adjacent cells after acquiring the priorities of the adjacent cells so as to obtain the target priorities capable of accurately representing the actual priorities of the adjacent cells. The LTE system and the NR system are taken as exemplary illustrations in the embodiment of the present invention, where frequency point priority upper limits corresponding to NR cells and LTE cells are different, and the frequency point priority upper limit of the NR cell is greater than the frequency point priority upper limit of the LTE cell, for example, the frequency point priority corresponding to the LTE cell is 0 to 7, and the frequency point priority corresponding to the NR cell is 0 to 9. Or, the upper limit of the priority levels of the frequency points corresponding to the NR cell and the LTE cell are the same, but the numerical division of the priority levels of the frequency points corresponding to the NR cell is different from the numerical division of the priority levels of the frequency points corresponding to the LTE cell, for example, the priority levels of the frequency points of the LTE cell only include 8 integers (basic priority information) from 0 to 7, sub-priority information (sub-priority) is also introduced or referred to as sub-priority information, and the values of the sub-priority information are as follows: {0.2,0.4,0.6,0.8}. The frequency point priority of the NR cell includes not only 8 integers from 0 to 7 but also a sub-priority whose value is {0.2, 0.4, 0.6, 0.8}, and the value of the sub-priority information may further include: {0.1,0.3,0.5,0.7,0.9}. In addition, the sub-priority information may further include sub-priorities with different values of granularity, for example, the values of the sub-priority information include: {0.2, 0.4, 0.6, 0.8} or {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9} sub-priority with an equivalent granularity of 0.1, and further the values of the sub-priority information may further include: {0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09} isoparticle size is a sub-optimal level of 0.01.

Where a neighbor cell may be one of the suitable reselection cells, different neighbor cells may be configured with the same or different priorities. Furthermore, the frequency points of different adjacent cells can be configured with the same or different priorities, and different frequency points can also be configured with the same or different priorities. The suitable reselected cell is a cell where the terminal can reside and obtain normal service, and the terminal needs to have an effective Universal Subscriber Identity Module (USIM), and the following conditions are satisfied:

the cell belongs to one of target Public Land Mobile Network (PLMN) identities of terminals, and the target PLMN includes: at least one of a selected PLMN (selected PLMN) of the terminal, a registered PLMN (registered PLMN) of the terminal, and an Equivalent PLMN list (Equivalent PLMN list) of the terminal.

The cell meets a preset cell reselection criterion.

The cell is not barred from attachment or access.

The Tracking Area (TA) broadcast by this cell is not in the Forbidden TA Area list (list of "Forbidden Tracking Areas").

Step 22: and executing a cell reselection process according to the target priority and the reselection condition reselected to the adjacent cell.

Wherein, performing the cell reselection procedure refers to: and the terminal determines whether the target cell can be reselected from the source cell according to the cell-level reselection parameters and the reselection conditions of the reselected neighbor cells, wherein the target cell is one of the neighbor cells. The reselection conditions reselected to the neighboring cells are related to target priorities of the neighboring cells, and the reselection conditions reselected to the neighboring cells may be different for the neighboring cells with different target priorities. And when the terminal detects that the reselection condition of reselecting to the adjacent cell is met, the terminal reselects to the target cell from the source cell.

The source cell (or called as a serving cell or a local cell) may be a cell initially accessed by the terminal, or may be a cell accessed by the terminal in the last cell reselection process. When the source cell is a cell initially accessed by the terminal, the source cell at least meets the following conditions:

the signal quality of the cell meets the preset conditions: the Signal Quality comprises Reference Signal Received Power (RSRP) and/or Reference Signal Received Quality (RSRQ);

the terminal may obtain necessary System Information of the cell, such as a Master Information Block (MIB) and a first System Information Block (System Information Block 1, SIB 1);

a cell access restriction Information Element (cellbar IE) in the system Information of the cell indicates that the cell is not prohibited from attaching or accessing. Wherein the cellbar IE may be in a Barred (Barred) or a non-Barred (notgared) state.

Further, when the source cell is a cell accessed by the terminal in the last cell reselection process, the source cell has various conditions suitable for reselecting the cell.

The implementation manner of step 21 in the embodiment of the present invention includes, but is not limited to, the following manners:

in the first mode, the priority of the adjacent cell is corrected according to reselection information related to cell reselection.

The reselection information may be configured by the network device, for example, the reselection information may be configured by the network device of the source cell where the terminal is located through Radio Resource Control (RRC) signaling and/or system message. The RRC signaling may be an RRC release (RRC release) message or the like. The system message may be SIB2, SIB4 or SIB5, etc. In addition, the reselection information according to the embodiment of the present invention may also be obtained by the terminal from a history reception message, where the history reception message includes, but is not limited to, RRC signaling and/or system message.

Wherein the reselection information comprises at least one of: priority information for indicating the priority of the neighbor cell, mapping relationship information for indicating the priority correspondence between the cells of different systems, priority comparison threshold information, and priority adjustment parameter information.

Wherein the priority information includes: basic priority information; taking the example that the frequency point priorities corresponding to the LTE cell and the NR cell are different from each other, the basic priority information is used to indicate that the frequency point priority corresponding to the LTE cell is an integer from 0 to 7, or indicate that the frequency point priority corresponding to the NR cell is an integer from 0 to 9.

Alternatively, the priority information includes: the device comprises basic priority information and sub-priority information, wherein the value granularity of the sub-priority information is smaller than that of the basic priority. Taking the same upper limit of the priority of the frequency point corresponding to the LTE cell and the NR cell as an example, the basic priority information is used to indicate that the priority of the frequency point corresponding to the LTE cell or the NR cell is an integer from 0 to 7. Further, the sub-priority information may include sub-priority information having a primary-value granularity smaller than the base priority (value granularity of 1), such as sub-priority information indicating that the NR cell corresponds to one of a sub-priority {0.2, 0.4, 0.6, 0.8} or {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9} of a sub-priority having a value granularity of 0.1. Alternatively, the sub-priority information may further include sub-priority information having at least two different levels of value granularity, for example, the sub-priority information may indicate one of a next-best level {0.2, 0.4, 0.6, 0.8} or {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9} of a value granularity of 0.1 corresponding to the NR cell, and one of a next-best level {0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09} of a value granularity of 0.01. It should be noted that, in the embodiment of the present invention, the value granularities 1, 0.1, and 0.01 are merely used as an exemplary illustration, and the value granularities of other decimal value ranges may also be applied in the embodiment of the present invention, and the specific decimal value range of the value granularities may be determined by a protocol convention, network device configuration, or network device and terminal negotiation.

The following embodiment further describes an implementation of the first embodiment with reference to a specific example.

Example one, the reselection information includes mapping relationship information indicating a priority correspondence between the inter-system cells.

When the reselection information includes the mapping relationship information, the step of correcting the priority of the neighboring cell according to the reselection information related to the cell reselection comprises the following steps: determining an equivalent priority corresponding to the priority of the adjacent cell according to the mapping relation information; and modifying the priority of the adjacent cell into an equivalent priority, wherein the modified priority (namely the equivalent priority) is the target priority of the adjacent cell.

The mapping relationship information in the embodiment of the present invention may be a correspondence between a frequency point priority of the NR system and a frequency point priority of the LTE system, and the mapping relationship information may be in a bitmap (bitmap) form.

For example, the terminal may obtain the frequency point priority (i.e., equivalent priority) of the corresponding equivalent LTE system by searching the mapping relationship information for the received frequency point priority of the NR system according to the mapping relationship information, and revise the priority of the NR cell to the equivalent priority.

Example two, the reselection information includes priority adjustment parameter information.

When the reselection information includes priority adjustment information, the step of correcting the priority of the neighboring cell according to the reselection information related to cell reselection includes: and correcting the priority of the adjacent cell according to the priority adjustment information.

The priority adjustment parameter information is used for indicating a priority scaling value, and the terminal can modify the priority of the neighboring cell in the following way: the priority of the neighbor cell is multiplied or divided by a priority scaling value. The priority scaling value may be a preset value or a ratio of highest priorities of the different system cells. If the frequency point priority of the LTE cell is 0 to 7 and the frequency point priority of the NR cell is 0 to 9, when the source cell is the LTE cell and the neighboring cell is the NR cell, the method of correcting the priority of the neighboring cell is as follows: multiplying the priority of the NR cell by 0.8 (namely the priority scaling value is 0.8, which is the upper limit of the frequency point priority value range of the LTE cell divided by the upper limit of the frequency point priority value range of the NR cell); when the source cell is an NR cell and the neighboring cell is an LTE cell, the method of correcting the priority of the neighboring cell is as follows: the priority of the LTE cell is divided by 0.8.

On the other hand, the priority adjustment parameter of the embodiment of the present invention may also be used to indicate a priority module value, and the terminal may modify the priority of the neighboring cell in the following manner: and performing modular operation on the priority of the adjacent cell according to the priority modular value. The priority module value may be agreed by a protocol, or configured by the network device, or determined by negotiation between the network device and the terminal. When the priority module value is configured by the network device, the value thereof may be changed or may be fixed. Preferably, the priority module value may be a ratio of highest priority of the inter-system cells.

If the priority module value is N, the frequency point priority of the LTE cell is 0 to 7, and the frequency point priority of the NR cell is 0 to 9, then when the source cell is the LTE cell and the adjacent cell is the NR cell, the method for correcting the priority of the adjacent cell is as follows: and performing modular operation on the priority of the NR cell according to the N, wherein the operation result is the target priority of the adjacent cell.

Example three, the reselection information includes priority comparison threshold information and priority adjustment parameter information.

And when the priority of the adjacent cell or the source cell is greater than the threshold indicated by the priority comparison threshold information, the terminal corrects the priority of the adjacent cell according to the priority adjustment parameter information. The specific modification can be implemented by referring to the second example, and therefore, the detailed description thereof is omitted here.

Assuming that the source cell is an LTE cell and the neighbor cell is an NR cell, when the priority of the LTE cell is greater than the priority comparison threshold information indication threshold, the priority of the NR cell is modified by the priority adjustment parameter information, such as multiplying the priority of the NR cell by a scaling value. For example, the frequency point priorities of the LTE cells are 0 to 7, the frequency point priorities of the NR cells are 0 to 79, the priority comparison threshold is 4, if the priority of the source cell is less than 4, the priority of the NR cell is not corrected, and if the priority of the source cell is greater than or equal to 5, the priority of the NR cell is multiplied by 0.1 to correct. Or, if the priority of the neighbor cell is 50 and the priority thereof is greater than 4, the priority of the NR cell is multiplied by 0.1 for correction.

And secondly, correcting the priority of the adjacent cell in a normalization processing mode.

The normalization processing method includes, but is not limited to: and dividing the priority of the adjacent cell by the highest priority of the cell of the first system, wherein the first system is the system to which the adjacent cell belongs. For example, the neighbor cell is an NR cell, and the highest cell priority of the NR cell is 7.8, then the target priority after normalization is obtained by dividing the priority of the neighbor cell by 7.8.

In this manner, in addition to normalizing the priorities of the neighboring cells, step 22 further includes: and correcting the priority of the source cell in a normalization processing mode. Specifically, the priority of the source cell is divided by the cell highest priority of the second system, where the second system is the system to which the source cell belongs. For example, the source cell is an LTE cell, and the highest cell priority of the LTE cell is 7, then the priority of the source cell is divided by 7 to obtain the normalized priority. And when the priority of the source cell is compared with that of the adjacent cell, comparing the priority of the source cell after the normalization processing with that of the adjacent cell.

It is to be noted that, the values of the priority, the priority comparison threshold, the priority adjustment parameter, and the highest priority of the cell involved in the embodiment of the present invention may be integers or decimal numbers.

Step 22 in the practice of the present invention may include, but is not limited to: comparing the target priority with the priority of the source cell to obtain a priority comparison result; determining a target reselection condition reselected to the neighboring cell according to the priority comparison result; and when the target reselection condition is met, reselecting the neighbor cell by the source cell.

The target priority of the adjacent cell is determined after the terminal corrects the priority of the adjacent cell, and when the priority of the adjacent cell is compared with that of the source cell, the terminal can also correct the priority of the source cell. For example, the source cell is corrected in priority by using the normalization processing method.

The triggering condition in step 22 is that the residence time of the terminal in the source cell exceeds a preset threshold, for example, 1s, that is, if the residence time of the terminal in the source cell exceeds the preset threshold, the cell reselection process is executed according to the target priority and the reselection condition for reselecting to the neighboring cell.

Further, the terminal needs to select to reselect to the neighboring cells with different frequency point priorities according to the satisfaction conditions of different conditions. The terminal may reselect to a high priority cell, a low priority cell, or a cell of the same priority. The high priority cell (or called high priority frequency point), the same priority cell (or called same priority frequency point), and the low priority cell (or called low priority frequency point) are the result of comparing the priorities of the neighboring cell and the source cell, that is, the result is obtained by comparing the priorities of the neighboring cell received by the terminal from the network equipment side after calculation with the priority of the source cell. If the target priority of the neighbor cell is higher than the priority of the source cell, the neighbor cell is a high-priority cell; if the target priority of the neighbor cell is lower than the priority of the source cell, the neighbor cell is a low-priority cell; and if the target priority of the adjacent cell is the same as the priority of the source cell, the adjacent cell is the cell with the same priority. For example: the source cell of the terminal is an LTE cell and receives the priority of the NR cell; a source cell of the terminal is an NR cell and receives the priority of an LTE cell; or, the terminal receives the priority of the NR cell and the priority of the LTE cell at the same time. And comparing the priority of the terminal source cell with the received priority of the adjacent cell to determine whether the adjacent cell is a high-priority cell, a same-priority cell or a low-priority cell.

Specific implementations of step 22 include, but are not limited to, the following scenarios:

in a first scenario, under the condition that the target priority is lower than the priority of the source cell, if a first parameter of the source cell is lower than a first preset threshold and a second parameter of the neighboring cell exceeds a second preset threshold, the source cell reselects the neighboring cell.

In particular, in this scenario, when the source isThresh corresponding to Squal of cell providing source cell_Serving,LowQIf it is, during the reselection time period Treselection_RATSqual of endogenous cells<Thresh_Serving,LowQAnd Squal of neighbor cell>Thresh_X,LowQOr neighboring cell Srxlev>Thresh_X,LowPAnd reselecting the adjacent cell from the source cell. That is, if thresh is broadcast in the system_Serving,LowQParameter and the terminal has camped on the source cell for more than 1 second, if Treselection is in the time interval Treselection_RATInterior satisfied serving cell Squal<Thresh_{Serving，LowQ}And has cell Squal on low priority NR/LTE frequency points>Thresh_X,LowQAnd the terminal initiates reselection to the adjacent cell on the low-priority frequency point.

Or, when the source cell does not provide the Thresh of the source cell_Serving,LowQIf it is, during the reselection time period Treselection_RATSrxlev of endogenous cell<Thresh_Serving,LowPAnd Srxlev of neighbor cell>Thresh_X,LowPIf so, reselecting the adjacent cell from the source cell; that is, if the system does not broadcast thresh_Serving,LowQParameters, but the terminal has resided in the source cell for more than 1 second and at a time interval Treselection_RATInner satisfied serving cell Srxlev<Thresh_Serving,LowPAnd has a cell Srxlev > Thresh on a low-priority NR/LTE frequency point_X，LowPAnd the terminal initiates reselection to the adjacent cell on the low-priority frequency point.

Where the above parameters are defined as described below, Squal is the cell selection signal quality value and Srxlev is the cell selection received signal level strength value, Thresh_{Serving，LowQ}Is the Squal threshold, Thresh, of the source cell_{Serving，LowP}Srxlev threshold, Thresh, for the source cell_X，LowQIs the Squal threshold, Thresh, of the neighbor cell_X，LowPIs the Srxlev threshold of the neighbor cell.

And in a second scenario, under the condition that the target priority is the same as the priority of the source cell, ranking the source cell and the neighbor cell, and if the ranking of the neighbor cell is higher than that of the source cell, reselecting the neighbor cell from the source cell.

In this scenario, the step of ranking the source cell and the neighboring cell includes: ranking a source cell and a neighbor cell by the following formula;

rating of source cell

Ranking of neighbor cells

Wherein Q is_meas，sReference signal received power, RSRP, measurement for source cell, Q_HystFor the measurement hysteresis of the source cell,

a measurement bias for a source cell; q_meas，nIs the RSRP measurement, Q, of a neighbor cell_offsetIs the first measurement offset of the neighbor cell,

a second measurement offset for a neighbor cell.

And in a third scenario, under the condition that the target priority is higher than the priority of the source cell, if the second parameter of the adjacent cell exceeds a second preset threshold, the source cell reselects the adjacent cell.

Under the scene, when the source cell provides Thresh corresponding to the Squal of the source cell_{Serving，LowQ}If it is, during the reselection time period Treselection_RATSqual > Thresh of inner adjacent cell_X，HighQReselecting the adjacent cell from the source cell; that is, if thresh is broadcast in the system_{Serving，LowQ}Parameters, and the terminal has resided in the current source cell for more than 1 second, if there is a cell on the high priority NR/LTE frequency point that satisfies Treselection in the time interval_RATInternal signal quality Squal > Thresh_X，HighQAnd the terminal initiates reselection to the adjacent cell on the high-priority frequency point.

Or, when the source cell does not provide Thresh of the source cell_{Serving，LowQ}If it is, during the reselection time period Treselection_RATSrxlev & gtThresh of inner adjacent cell_X，HighPIf so, reselecting the adjacent cell from the source cell; that is, if the system does not broadcast thresh_{Serving，LowQ}Parameters, but the terminal already resides in the source cell for more than 1 second, and the cells with high priority frequency points satisfy Treselection in the time interval reselection time period_RATInner Srxlev>Thresh_X,HighPAnd the terminal initiates reselection to the adjacent cell on the high-priority frequency point.

Where the above parameters are explained with reference to the following, Squal is the cell selection signal quality value and Srxlev is the cell selection received signal level strength value, Thresh_Serving,LowQIs the Squal threshold, Thresh, of the source cell_X,HighQIs the Squal threshold, Thresh, of the neighbor cell_X,HighPIs the Srxlev threshold of the neighbor cell.

According to the cell reselection method provided by the embodiment of the invention, the terminal can correct the priority of the adjacent cell, and whether the adjacent cell is reselected is determined according to the corrected target priority and the reselection condition of the reselected adjacent cell, so that the quality of the reselected cell can meet the residence requirement, and the problem of unstable terminal connection after cell reselection is avoided.

The foregoing embodiments respectively describe the cell reselection methods in different scenarios in detail, and the following embodiments further describe the corresponding terminals with reference to the accompanying drawings.

As shown in fig. 3, the terminal 300 according to the embodiment of the present invention can modify the priority of the neighboring cell in the foregoing embodiment to obtain the target priority; the details of the cell reselection process method are executed according to the target priority and the reselection condition of the reselected neighboring cell, and the same effect is achieved, and the terminal 300 specifically includes the following functional modules:

a first correcting module 310, configured to correct the priority of the neighboring cell to obtain a target priority;

a reselection module 320, configured to execute a cell reselection process according to the target priority and a reselection condition reselected to a neighboring cell.

The first modification module 310 includes:

and the first correction submodule is used for correcting the priority of the adjacent cell according to reselection information related to cell reselection.

Wherein the reselection information comprises at least one of:

priority information indicating a priority of a neighbor cell,

priority comparison threshold information, an

Priority adjustment parameter information.

Wherein the priority information includes: basic priority information;

alternatively, the priority information includes: the device comprises basic priority information and sub-priority information, wherein the value granularity of the sub-priority information is smaller than that of the basic priority.

The sub-priority information comprises sub-priority information with at least two different values of granularity.

Wherein, when the reselection information comprises: when the priority compares the threshold information with the priority adjustment parameter information, the first modification submodule includes:

and the first correcting unit is used for correcting the priority of the adjacent cell according to the priority adjusting parameter information when the priority of the adjacent cell or the source cell is greater than the threshold indicated by the priority comparison threshold information.

Wherein, the priority adjustment parameter information is used for indicating the priority zoom value, and the first modification submodule includes:

a second modification unit for multiplying or dividing the priority of the neighbor cell by the priority scaling value.

Wherein the priority scaling value is: presetting a numerical value or a ratio of the highest priority of the different system cells.

Wherein, the priority adjustment parameter information is used for indicating the priority module value, and the first modification submodule includes:

and the third correcting unit is used for performing modular operation on the priority of the adjacent cell according to the priority modular value.

When the reselection information includes the mapping relationship information, the first modification submodule includes:

a determining unit, configured to determine, according to the mapping relationship information, an equivalent priority corresponding to a priority of the neighboring cell;

and the fourth correcting unit is used for correcting the priority of the adjacent cell into the equivalent priority.

Wherein the reselection information is configured by the network device, or the reselection information is obtained from a history reception message.

The first modification module 310 further includes:

and the second correction submodule is used for correcting the priority of the adjacent cell in a normalization processing mode.

Wherein the second correction submodule includes:

and a fifth correcting unit, configured to divide the priority of the neighboring cell by a highest priority of a cell of a first system, where the first system is a system to which the neighboring cell belongs.

Wherein, the terminal 300 further includes:

and the second correction module is used for correcting the priority of the source cell in a normalization processing mode.

Wherein the second correction module comprises:

and the third correction submodule is used for dividing the priority of the source cell by the highest priority of the cell of a second system, wherein the second system is the system to which the source cell belongs.

The reselection module 320 is specifically configured to: and if the residence time in the source cell exceeds a preset threshold, reselecting the neighboring cell from the source cell according to the target priority and the reselection condition of the reselected neighboring cell.

Wherein the reselection module 320 comprises:

the first reselection submodule is used for reselecting the adjacent cell from the source cell if the first parameter of the source cell is lower than a first preset threshold and the second parameter of the adjacent cell exceeds a second preset threshold under the condition that the target priority is lower than the priority of the source cell;

alternatively, the first and second electrodes may be,

the second reselection submodule is used for ranking the source cell and the adjacent cell under the condition that the target priority is the same as the priority of the source cell, and if the ranking of the adjacent cell is higher than that of the source cell, the source cell reselects the adjacent cell;

alternatively, the first and second electrodes may be,

and the third reselection sub-module is used for reselecting the adjacent cell from the source cell if the second parameter of the adjacent cell exceeds a second preset threshold under the condition that the target priority is higher than the priority of the source cell.

Wherein the first reselection submodule comprises:

a first reselection unit, configured to provide Thresh corresponding to Squal of the source cell when the source cell provides the source cell_{Serving，LowQ}If it is, during the reselection time period Treselection_RATSqual < Thresh for endogenous cells_{Serving，LowQ}And neighbor cell Squal > Thresh_X，LowQOr Srxlev > Thresh of adjacent cell_X，LowPReselecting the adjacent cell from the source cell;

alternatively, the first and second electrodes may be,

a second reselection unit for providing Thresh of the source cell when the source cell does not provide the source cell_{Serving，LowQ}If it is, during the reselection time period Treselection_RATSrxlev < Thresh of endogenous cell_{Serving，LowP}And Srxlev > Thresh of adjacent cell_X，LowPReselecting the adjacent cell from the source cell;

wherein Squal is the cell selection signal quality value, Srxlev is the cell selection received signal level strength value, Thresh_{Serving，LowQ}Is the Squal threshold, Thresh, of the source cell_{Serving，LowP}Srxlev threshold, Thresh, for the source cell_X，LowQIs the Squal threshold, Thresh, of the neighbor cell_X，LowPIs the Srxlev threshold of the neighbor cell.

Wherein the second reselection submodule comprises:

the ranking unit is used for ranking the source cell and the adjacent cell through the following formula;

rating of source cell

Ranking of neighbor cells

a measurement bias for a source cell;

Q_meas，nis the RSRP measurement, Q, of a neighbor cell_offsetIs the first measurement offset of the neighbor cell,

a second measurement offset for a neighbor cell.

Wherein the third reselection submodule comprises:

a third reselecting unit for providing Thresh corresponding to Squal of the source cell when the source cell provides the source cell_{Serving，LowQ}If it is, during the reselection time period Treselection_RATSqual > Thresh of inner adjacent cell_X，HighQIf so, reselecting the adjacent cell from the source cell;

alternatively, the first and second electrodes may be,

a fourth reselection unit, configured to reselect the Thresh when the source cell does not provide the source cell_{Serving，LowQ}If it is, during the reselection time period Treselection_RATSrxlev & gtThresh of inner adjacent cell_X，HighPIf so, reselecting the adjacent cell from the source cell;

wherein Squal is the cell selection signal quality value, Srxlev is the cell selection received signal level strength value, Thresh_{Serving，LowQ}Is the Squal threshold, Thresh, of the source cell_X，HighQIs the Squal threshold, Thresh, of the neighbor cell_X，HighPIs the Srxlev threshold of the neighbor cell.

It is worth pointing out that the terminal in the embodiment of the present invention may modify the priority of the neighboring cell, and determine whether to reselect the neighboring cell according to the modified target priority and the reselection condition of the reselected neighboring cell, so as to ensure that the quality of the reselected cell meets the camping requirement, and avoid the problem of unstable terminal connection after cell reselection.

To better achieve the above object, further, fig. 4 is a schematic diagram of a hardware structure of a terminal implementing various embodiments of the present invention, where the terminal 40 includes, but is not limited to: radio frequency unit 41, network module 42, audio output unit 43, input unit 44, sensor 45, display unit 46, user input unit 47, interface unit 48, memory 49, processor 410, and power supply 411. Those skilled in the art will appreciate that the terminal configuration shown in fig. 4 is not intended to be limiting, and that the terminal may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The radio frequency unit 41 is configured to receive and transmit data under the control of the processor 410;

the processor 410 is configured to modify the priority of the neighboring cell to obtain a target priority; executing a cell reselection process according to the target priority and the reselection condition reselected to the adjacent cell;

the terminal of the embodiment of the invention can correct the priority of the adjacent cell, and determines whether the adjacent cell is reselected according to the corrected target priority and the reselection condition of the reselected adjacent cell, so that the quality of the reselected cell can meet the resident requirement, and the problem of unstable terminal connection after cell reselection is avoided.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 41 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 410; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 41 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 41 can also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user via the network module 42, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 43 may convert audio data received by the radio frequency unit 41 or the network module 42 or stored in the memory 49 into an audio signal and output as sound. Also, the audio output unit 43 may also provide audio output related to a specific function performed by the terminal 40 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 43 includes a speaker, a buzzer, a receiver, and the like.

The input unit 44 is for receiving an audio or video signal. The input Unit 44 may include a Graphics Processing Unit (GPU) 441 and a microphone 442, and the Graphics processor 441 processes image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 46. The image frames processed by the graphic processor 441 may be stored in the memory 49 (or other storage medium) or transmitted via the radio frequency unit 41 or the network module 42. The microphone 442 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 41 in case of the phone call mode.

The terminal 40 also includes at least one sensor 45, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 461 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 461 and/or a backlight when the terminal 40 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 45 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 46 is used to display information input by the user or information provided to the user. The Display unit 46 may include a Display panel 461, and the Display panel 461 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 47 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 47 includes a touch panel 471 and other input devices 472. The touch panel 471, also referred to as a touch screen, may collect touch operations by a user (e.g., operations by a user on or near the touch panel 471 using a finger, a stylus, or any other suitable object or accessory). The touch panel 471 can include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 410, receives a command from the processor 410, and executes the command. In addition, the touch panel 471 can be implemented by various types, such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 47 may include other input devices 472 in addition to the touch panel 471. Specifically, the other input devices 472 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 471 can be overlaid on the display panel 461, and when the touch panel 471 detects a touch operation on or near the touch panel 471, the touch panel transmits the touch operation to the processor 410 to determine the type of the touch event, and then the processor 410 provides a corresponding visual output on the display panel 461 according to the type of the touch event. Although the touch panel 471 and the display panel 461 are shown as two separate components in fig. 4, in some embodiments, the touch panel 471 and the display panel 461 may be integrated to implement the input and output functions of the terminal, and are not limited herein.

The interface unit 48 is an interface for connecting an external device to the terminal 40. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 48 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the terminal 40 or may be used to transmit data between the terminal 40 and external devices.

The memory 49 may be used to store software programs as well as various data. The memory 49 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 49 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 410 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 49 and calling data stored in the memory 49, thereby performing overall monitoring of the terminal. Processor 410 may include one or more processing units; preferably, the processor 410 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 410.

The terminal 40 may further include a power supply 411 (e.g., a battery) for supplying power to various components, and preferably, the power supply 411 may be logically connected to the processor 410 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

In addition, the terminal 40 includes some functional modules that are not shown, and are not described in detail herein.

Preferably, an embodiment of the present invention further provides a terminal, which includes a processor 410, a memory 49, and a computer program stored in the memory 49 and capable of running on the processor 410, where the computer program, when executed by the processor 410, implements each process of the above-mentioned cell reselection method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. A terminal may be a wireless terminal or a wired terminal, and a wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (RAN), which may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a User Device or User Equipment (User Equipment), which are not limited herein.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the cell reselection method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

The above embodiment describes the cell reselection method of the present invention from the terminal side, and the following embodiment further describes the cell reselection method on the network device side with reference to the accompanying drawings.

As shown in fig. 5, the cell reselection method according to the embodiment of the present invention is applied to a network device side, and includes the following steps:

step 51: transmitting reselection information related to cell reselection, wherein the reselection information comprises: at least one of mapping relationship information for indicating a priority correspondence between the inter-system cells, priority comparison threshold information, and priority adjustment parameter information.

The network device may configure the reselection information to the terminal via RRC signaling and/or system messages. The RRC signaling may be an RRC release (RRC release) message or the like. The system message may be SIB2, SIB4 or SIB5, etc. The reselection information in the embodiment of the present invention is used to modify the priority of the neighboring cell or the source cell.

Wherein the reselection information further comprises: priority information indicating a priority of a neighbor cell. Wherein, the priority information may include: base priority information. In addition, the priority information may further include: the device comprises basic priority information and sub-priority information, wherein the value granularity of the sub-priority information is smaller than that of the basic priority. Further, the sub-priority information may include sub-priority information having a one-level value granularity smaller than the base priority (value granularity of 1), or the sub-priority information may further include sub-priority information having at least two levels of different values granularities. It is worth pointing out that, in the embodiment of the present invention, the specific decimal numeric value range of the value granularity may be determined by a protocol agreement, network device configuration, or a negotiation between the network device and the terminal.

Further, the mapping relationship information may be a correspondence between the frequency point priority of the NR system and the frequency point priority of the LTE system, and the mapping relationship information may be in the form of a bitmap. The terminal can obtain the frequency point priority (equivalent priority) of the corresponding equivalent LTE system by searching the mapping relation information according to the mapping relation information and the received frequency point priority of the NR system, and revise the priority of the NR cell into the equivalent priority

The priority adjustment parameter information is used for indicating a priority scaling value, or the priority adjustment parameter information is used for indicating a priority modulus value. The terminal can modify the priority of the neighbor cell by multiplying or dividing the priority of the neighbor cell by the priority scaling value. Wherein the priority scaling value is: presetting a numerical value or a ratio of the highest priority of the different system cells. Or, the terminal may also perform a modulo operation on the priority of the neighboring cell according to the priority modulo value to correct the priority of the neighboring cell. The priority module value may be agreed by a protocol, or configured by the network device, or determined by negotiation between the network device and the terminal. When the priority module value is configured by the network device, the value thereof may be changed or may be fixed. Preferably, the priority module value may be a ratio of highest priority of the inter-system cells.

It should be noted that the description and application scenarios of each reselection parameter related in the network device side embodiment can be implemented with reference to the terminal side embodiment, and therefore are not described herein again.

In the cell reselection method of the embodiment of the invention, the network equipment configures the reselection parameters for the terminal for cell reselection, and the reselection parameters are used for correcting the priority of the adjacent cell, so that the terminal can be ensured to perform cell reselection based on accurate reselection conditions, the quality of the reselected cell can be ensured to meet the resident requirement, and the problem of unstable terminal connection after cell reselection is avoided.

The foregoing embodiments respectively describe the cell reselection methods in different scenarios in detail, and the following embodiments further describe the corresponding network devices with reference to the accompanying drawings.

As shown in fig. 6, a network device 600 according to an embodiment of the present invention can implement details of a method for sending reselection information related to cell reselection in the foregoing embodiment, and achieve the same effect, where the reselection information includes: at least one of mapping relationship information for indicating a priority correspondence between the inter-system cells, priority comparison threshold information, and priority adjustment parameter information. The network device 600 specifically includes the following functional modules:

a sending module 610, configured to send reselection information related to cell reselection, wherein the reselection information includes at least one of the following information:

priority comparison threshold information, an

Priority adjustment parameter information.

Wherein the reselection information further comprises: priority information indicating a priority of a neighbor cell.

Wherein the priority information includes: basic priority information;

The priority adjustment parameter information is used for indicating a priority scaling value, or the priority adjustment parameter information is used for indicating a priority modulus value.

It is worth pointing out that the network device in the embodiment of the present invention configures a reselection parameter for the terminal, where the reselection parameter is used to modify the priority of the neighboring cell, so as to ensure that the terminal performs cell reselection based on an accurate reselection condition, ensure that the quality of the reselected cell meets the camping requirement, and avoid the problem of unstable terminal connection after cell reselection.

It should be noted that the division of the modules of the network device and the terminal is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the determining module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the determining module is called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when some of the above modules are implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor that can invoke the program code. As another example, these modules may be integrated together, implemented in the form of a system-on-a-chip (SOC).

To better achieve the above object, an embodiment of the present invention further provides a network device, which includes a processor, a memory, and a computer program stored in the memory and running on the processor, and when the processor executes the computer program, the steps in the cell reselection method described above are implemented. An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the cell reselection method as described above.

Specifically, the embodiment of the invention also provides a network device. As shown in fig. 7, the network device 700 includes: an antenna 71, a radio frequency device 72, a baseband device 73. The antenna 71 is connected to a radio frequency device 72. In the uplink direction, the rf device 72 receives information via the antenna 71 and sends the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes information to be transmitted and transmits the information to the rf device 72, and the rf device 72 processes the received information and transmits the processed information through the antenna 71.

The above-mentioned band processing means may be located in the baseband means 73, and the method performed by the network device in the above embodiment may be implemented in the baseband means 73, where the baseband means 73 includes a processor 74 and a memory 75.

The baseband device 73 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 7, wherein one of the chips, for example, the processor 74, is connected to the memory 75 to call up the program in the memory 75 to perform the network device operation shown in the above method embodiment.

The baseband device 73 may further include a network interface 76, such as a Common Public Radio Interface (CPRI), for exchanging information with the radio frequency device 72.

The processor may be a single processor or a combination of multiple processing elements, for example, the processor may be a CPU, an ASIC, or one or more integrated circuits configured to implement the methods performed by the network devices, for example: one or more microprocessors DSP, or one or more field programmable gate arrays FPGA, or the like. The storage element may be a memory or a combination of a plurality of storage elements.

The memory 75 may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 75 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Specifically, the network device of the embodiment of the present invention further includes: a computer program stored on the memory 75 and executable on the processor 74, the processor 74 calling the computer program in the memory 75 to execute the method performed by each module shown in fig. 6.

In particular, the computer program when invoked by the processor 74 is operable to perform: transmitting reselection information related to cell reselection, wherein the reselection information comprises at least one of:

priority comparison threshold information, an

Priority adjustment parameter information.

The network equipment in the embodiment of the invention configures reselection parameters for the terminal for cell reselection, and the reselection parameters are used for correcting the priority of the adjacent cell, so that the terminal can be ensured to perform cell reselection based on accurate reselection conditions, the quality of the reselected cell can be ensured to meet the resident requirement, and the problem of unstable terminal connection after cell reselection is avoided.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the preferred embodiments of the present invention have been described, 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 following claims.

Claims

1. A cell reselection method is applied to a terminal side, and is characterized by comprising the following steps:

correcting the priority of the adjacent cell to obtain a target priority;

executing a cell reselection process according to the target priority and the reselection condition reselected to the adjacent cell;

the step of correcting the priority of the adjacent cell comprises the following steps:

correcting the priority of the adjacent cell according to reselection information related to cell reselection;

when the reselection information comprises: when the priority compares the threshold information with the priority adjustment parameter information, the step of correcting the priority of the adjacent cell according to the reselection information related to cell reselection comprises the following steps:

and when the priority of the adjacent cell or the source cell is greater than the threshold indicated by the priority comparison threshold information, modifying the priority of the adjacent cell according to the priority adjustment parameter information.

2. The cell reselection method of claim 1, wherein the reselection information further comprises at least one of:

priority information indicating the priority of the neighbor cell,

and mapping relation information used for indicating the priority corresponding relation between the different system cells.

3. The cell reselection method of claim 2, wherein the priority information comprises: basic priority information;

or, the priority information includes: base priority information and sub-priority information, wherein a value granularity of the sub-priority information is less than a value granularity of the base priority.

4. The cell reselection method of claim 3, wherein said sub-priority information comprises sub-priority information having at least two different values of granularity.

5. The cell reselection method of claim 1, wherein the priority adjustment parameter information is used to indicate a priority scaling value, and the step of modifying the priority of the neighboring cell according to the reselection information related to cell reselection comprises:

multiplying or dividing the priority of the neighbor cell by the priority scaling value.

6. The cell reselection method of claim 5, wherein the priority scaling value is: presetting a numerical value or a ratio of the highest priority of the different system cells.

7. The cell reselection method of claim 1, wherein the priority adjustment parameter information is used to indicate a priority module value, and the step of modifying the priority of the neighboring cell according to reselection information related to cell reselection comprises:

and performing modular operation on the priority of the adjacent cell according to the priority modular value.

8. The cell reselection method according to claim 2, wherein when the reselection information includes the mapping relationship information, the step of modifying the priority of the neighboring cell according to the reselection information related to cell reselection comprises:

determining an equivalent priority corresponding to the priority of the adjacent cell according to the mapping relation information;

and modifying the priority of the adjacent cell into the equivalent priority.

9. The cell reselection method of claim 1, wherein the reselection information is configured by a network device or is obtained from a history of received messages.

10. The cell reselection method of claim 1, wherein the step of modifying the priority of the neighbor cell comprises:

and correcting the priority of the adjacent cell in a normalization processing mode.

11. The cell reselection method according to claim 10, wherein the step of modifying the priority of the neighboring cell by a normalization process comprises:

and dividing the priority of the adjacent cell by the highest priority of the cell of a first system, wherein the first system is a system to which the adjacent cell belongs.

12. The cell reselection method of claim 10, wherein before the step of performing the cell reselection procedure according to the target priority and the reselection condition for reselecting to the neighboring cell, the method further comprises:

and correcting the priority of the source cell in a normalization processing mode.

13. The cell reselection method of claim 12, wherein the step of modifying the priority of the source cell by a normalization process comprises:

and dividing the priority of the source cell by the highest priority of a cell of a second system, wherein the second system is a system to which the source cell belongs.

14. The cell reselection method of claim 1, wherein the step of performing the cell reselection procedure according to the target priority and the reselection condition for reselecting to the neighboring cell comprises:

and if the residence time in the source cell exceeds a preset threshold, executing a cell reselection process according to the target priority and the reselection condition reselected to the adjacent cell.

15. The cell reselection method according to claim 1 or 14, wherein the step of performing the cell reselection procedure according to the target priority and the reselection condition for reselecting to the neighboring cell comprises:

if the target priority is lower than the priority of the source cell, if the first parameter of the source cell is lower than a first preset threshold and the second parameter of the adjacent cell exceeds a second preset threshold, the source cell reselects the adjacent cell;

alternatively, the first and second electrodes may be,

under the condition that the target priority is the same as the priority of the source cell, ranking the source cell and the adjacent cell, and if the ranking of the adjacent cell is higher than that of the source cell, reselecting the adjacent cell from the source cell;

alternatively, the first and second electrodes may be,

and if the second parameter of the adjacent cell exceeds a second preset threshold value, the source cell reselects the adjacent cell under the condition that the target priority is higher than the priority of the source cell.

16. A terminal, comprising:

the first correction module is used for correcting the priority of the adjacent cell to obtain a target priority;

a reselection module, configured to execute a cell reselection process according to the target priority and a reselection condition for reselecting the neighboring cell;

wherein, the step of correcting the priority of the adjacent cell comprises the following steps:

17. A terminal, characterized in that the terminal comprises a processor, a memory and a computer program stored on the memory and running on the processor, which computer program, when executed by the processor, carries out the steps of the cell reselection method according to any of claims 1 to 15.

18. A cell reselection method is applied to a network device side, and is characterized by comprising the following steps:

transmitting reselection information related to cell reselection, wherein the reselection information comprises:

priority comparison threshold information, an

Priority adjustment parameter information;

and under the condition that the priority of the adjacent cell or the source cell is greater than the threshold indicated by the priority comparison threshold information, the terminal side corrects the priority of the adjacent cell according to the priority adjustment parameter information.

19. The cell reselection method of claim 18, wherein the reselection information further comprises at least one of:

priority information for indicating a priority of a neighbor cell;

20. The cell reselection method of claim 19, wherein the priority information comprises: basic priority information;

21. The cell reselection method of claim 20, wherein said sub-priority information comprises sub-priority information having at least two different values of granularity.

22. The cell reselection method of claim 18, wherein the priority adjustment parameter information is used to indicate a priority scaling value, or wherein the priority adjustment parameter information is used to indicate a priority modulus value.

23. The cell reselection method of claim 22, wherein the priority scaling value is: presetting a numerical value or a ratio of the highest priority of the different system cells.

24. A network device, comprising:

a sending module, configured to send reselection information related to cell reselection, where the reselection information includes:

priority comparison threshold information, an

Priority adjustment parameter information;

25. The network device of claim 24, wherein the reselection information further comprises at least one of:

priority information for indicating a priority of a neighbor cell;

26. A network device comprising a processor, a memory, and a computer program stored on the memory and running on the processor, the computer program, when executed by the processor, implementing the steps of a cell reselection method as claimed in any of claims 18 to 23.

27. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the cell reselection method according to any of claims 1 to 15 and 18 to 23.