CN104469861B - Cell selection method, device and terminal - Google Patents
Cell selection method, device and terminal Download PDFInfo
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- CN104469861B CN104469861B CN201310439995.7A CN201310439995A CN104469861B CN 104469861 B CN104469861 B CN 104469861B CN 201310439995 A CN201310439995 A CN 201310439995A CN 104469861 B CN104469861 B CN 104469861B
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Abstract
The embodiment of the invention provides a cell selection method, a cell selection device and a cell selection terminal. The method comprises the following steps: when cell selection is carried out from at least two cells, obtaining respective load high-low characteristic values of the at least two cells, wherein the smaller the load high-low characteristic value is, the lower the cell load is; for each cell of the at least two cells, determining the cell selection priority value of each cell according to a cell selection priority value calculation function, and the load characteristic value and the current signal strength estimation value of each cell, wherein the larger the cell selection priority value is, the higher the cell selection priority is; and selecting the cell with the largest cell priority value from the at least two cells as a target serving cell. The embodiment of the invention improves the flexibility of terminal cell selection.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a cell selection method, apparatus, and terminal.
Background
Long Term Evolution (LTE) technology as a next generation wireless communication technology standard has greatly improved network speed compared with the past communication technology, but if too many users are accessed by one cell, the users in the current cell cannot experience the advantages of the LTE network well. The phenomenon of unbalanced load distribution in the LTE cell not only reduces network capacity but also affects the quality of service for the user. The reasons directly promote the birth of a Mobile Load Balancing (MLB) technology, and maximize the total network capacity while ensuring the service quality of users.
Currently, in the existing MLB technology, a cell base station sets appropriate cell handover and cell selection/reselection and redirection parameters on the basis of sensing the load level of a neighboring cell, so that an active or idle user is handed over from a high-load cell or resides in a suitable low-load neighboring cell. Or when the load of the current cell is heavier, the service quality of the user with lower priority is reduced, and the service quality of the user with high priority is preferentially ensured. That is, the control right of the current MLB technology is on the network side, and the terminal can only passively accept the arrangement on the network side, and cannot flexibly operate according to the cell load condition.
Disclosure of Invention
In view of this, embodiments of the present invention provide a cell selection method, a device and a terminal, so as to support the terminal to perform cell selection according to a cell load condition, and improve flexibility of cell selection of the terminal.
In order to solve the above technical problem, an embodiment of the present invention provides the following solutions:
the embodiment of the invention provides a cell selection method for a terminal, which comprises the following steps:
when cell selection is carried out from at least two cells, obtaining respective load high-low characteristic values of the at least two cells, wherein the smaller the load high-low characteristic value is, the lower the cell load is;
for each cell of the at least two cells, determining the cell selection priority value of each cell according to a cell selection priority value calculation function, and the load characteristic value and the current signal strength estimation value of each cell, wherein the larger the cell selection priority value is, the higher the cell selection priority is;
and selecting the cell with the largest cell priority value from the at least two cells as a target serving cell.
Preferably, for the step of obtaining the characteristic values of the load of each of the at least two cells when performing cell selection from the at least two cells, the characteristic value of the load of any one of the at least two cells is generated as follows:
when a control signaling sent by a network side is received in the time period of any cell residence, judging whether the control signaling is a load balancing related control signaling or not, and acquiring a first judgment result;
and when the first judgment result is yes, updating the load high-low characteristic value of any cell according to a first load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is increased.
Preferably, the updating the load characteristic value of any cell according to the first load characteristic value updating strategy so that the load characteristic value of any cell is increased includes:
judging whether the delay time interval of the time of the terminal for receiving the load balancing related control signaling relative to the starting time of the time period is smaller than a preset time interval or not, and acquiring a second judgment result;
when the second judgment result is yes, updating the load characteristic value of any cell according to the first load characteristic value updating strategy, so that the load characteristic value of any cell is increased;
and when the second judgment result is negative, updating the load high-low characteristic value of any cell according to a second load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is reduced.
Preferably, the cell preference value calculation function is an increasing function of the current signal strength estimation value and/or a decreasing function of the load high and low characteristic values.
Preferably, the cell selection priority value calculation function is: cell preferred level value = current signal strength estimated value-load high-low characteristic value × preset coefficient.
An embodiment of the present invention further provides a cell selection apparatus, for a terminal, including:
an obtaining module, configured to obtain respective load high-low characteristic values of at least two cells when cell selection is performed in the at least two cells, where a smaller load high-low characteristic value indicates a lower cell load;
a determining module, configured to determine, for each of the at least two cells, a cell selection priority value of each cell according to a cell selection priority value calculation function, and the load characteristic value and the current signal strength estimation value of each cell, where a larger cell selection priority value indicates a higher cell selection priority;
and the selecting module is used for selecting the cell with the largest cell priority value from the at least two cells as the target serving cell.
Preferably, for the obtaining module, the characteristic value of load of any one of the at least two cells is generated as follows:
when a control signaling sent by a network side is received in the time period of any cell residence, judging whether the control signaling is a load balancing related control signaling or not, and acquiring a first judgment result;
and when the first judgment result is yes, updating the load high-low characteristic value of any cell according to a first load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is increased.
Preferably, the updating the load characteristic value of any cell according to the first load characteristic value updating strategy so that the load characteristic value of any cell is increased includes:
judging whether the delay time interval of the time of the terminal for receiving the load balancing related control signaling relative to the starting time of the time period is smaller than a preset time interval or not, and acquiring a second judgment result;
when the second judgment result is yes, updating the load characteristic value of any cell according to the first load characteristic value updating strategy, so that the load characteristic value of any cell is increased;
and when the second judgment result is negative, updating the load high-low characteristic value of any cell according to a second load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is reduced.
Preferably, the cell preference value calculation function is an increasing function of the current signal strength estimation value and/or a decreasing function of the load high and low characteristic values.
Preferably, the cell selection priority value calculation function is: cell preferred level value = current signal strength estimated value-load high-low characteristic value × preset coefficient.
The embodiment of the invention also provides a terminal comprising the cell selection device.
From the above, it can be seen that the embodiments of the present invention have at least the following beneficial effects:
the cell load high-low condition is indicated through the load high-low characteristic value, the cell selection priority value is indicated through the cell selection priority value, and a functional relation is established for the load high-low characteristic value, the current signal strength estimation value and the cell selection priority value of each cell through a cell selection priority value calculation function, so that the terminal is supported to perform cell selection according to the cell load condition, and the flexibility of terminal cell selection is improved.
Drawings
Fig. 1 is a flowchart illustrating steps of a cell selection method according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a preferred embodiment of the present invention;
FIG. 3 is a diagram illustrating a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a flowchart illustrating steps of a cell selection method according to an embodiment of the present invention, and referring to fig. 1, the embodiment of the present invention provides a cell selection method, including the following steps:
101, when selecting a cell from at least two cells, obtaining respective load high and low characteristic values of the at least two cells, wherein the smaller the load high and low characteristic values are, the lower the cell load is;
102, for each cell of the at least two cells, determining a cell selection priority value of each cell according to a cell selection priority value calculation function, and a load characteristic value and a current signal strength estimation value of each cell, wherein the larger the cell selection priority value is, the higher the cell selection priority is;
step 103, selecting the cell with the largest cell preference value from the at least two cells as the target serving cell.
The method is used for the terminal.
Therefore, by the mode, the cell load high-low conditions are indicated by the load high-low characteristic values, the cell selection priority value is indicated by the cell selection priority value, and the functional relationship is established for the load high-low characteristic values, the current signal strength estimation value and the cell selection priority value of each cell by the cell selection priority value calculation function, so that the terminal is supported to perform cell selection according to the cell load conditions, and the flexibility of terminal cell selection is improved.
The current signal strength estimation value is, for example: current signal strength estimate = current RSRP value QrxlevmeasMinimum reception strength Q of- (current RSRP)rxlevminOffset value Q of minimum received Strength of + Current RSRPrxlevminoffset) -a compensation value Pcompensation.
In the embodiment of the present invention, there may be:
for the step of obtaining the characteristic values of the load of each of the at least two cells when the cell selection is performed from the at least two cells, the characteristic values of the load of any one of the at least two cells are generated as follows:
when a control signaling sent by a network side is received in the time period of any cell residence, judging whether the control signaling is a load balancing related control signaling or not, and acquiring a first judgment result;
and when the first judgment result is yes, updating the load high-low characteristic value of any cell according to a first load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is increased.
The load balancing related control signaling is, for example: RRC release (rrcreate) signaling carrying TAU (Tracking Area Update) Load Balancing requirement cause (Load Balancing TAU Required) cell.
The first load high-low characteristic value updating strategy comprises the following steps: increasing a first preset value, such as 1, to the load characteristic value of any cell; or, the load height characteristic value of any cell is multiplied; and so on.
Considering that for the case that the terminal leaves after a certain cell resides for a long time, it is sporadic that the terminal leaves the cell due to load balancing, if the cell is re-accessed, the network side has less possibility to perform load balancing related operation for the terminal, so that the terminal may still obtain better service. In view of this, there may be:
the updating the load characteristic value of any cell according to the first load characteristic value updating strategy so that the load characteristic value of any cell is increased comprises:
judging whether the delay time interval of the time of the terminal for receiving the load balancing related control signaling relative to the starting time of the time period is smaller than a preset time interval or not, and acquiring a second judgment result;
when the second judgment result is yes, updating the load characteristic value of any cell according to the first load characteristic value updating strategy, so that the load characteristic value of any cell is increased;
and when the second judgment result is negative, updating the load high-low characteristic value of any cell according to a second load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is reduced.
The preset time interval is, for example: selected within the range of 30 minutes to 1 hour.
The second load high-low characteristic value updating strategy comprises the following steps: reducing the load height characteristic value of any cell by a second preset value, wherein the second preset value is, for example, 1, and the second preset value may be the same as or different from the first preset value; or reducing the load high-low characteristic value of any cell to zero; and so on.
In the embodiment of the present invention, the cell selection priority value calculation function may be an increasing function of the current signal strength estimation value and/or a decreasing function of the load level characteristic value.
Here, the cell selection priority value calculation function being an increasing function of the current signal strength estimation value means: under the condition that the values of other parameters and independent variables of the function except the current signal strength estimated value are unchanged, the value of the function is increased along with the increase of the current signal strength estimated value. This is advantageous in maintaining compatibility with existing cell selection mechanisms.
The cell preference value calculation function is a subtraction function of the load high and low characteristic values, and the cell preference value calculation function is as follows: under the condition that the values of other parameters and independent variables of the function except the characteristic values of the load height are unchanged, the value of the function is increased along with the reduction of the characteristic values of the load height. Therefore, when the current signal strength estimated values of the at least two cells are the same, the terminal selects the cell with the minimum load characteristic value as the target serving cell, so that the possibility that the terminal selects the cell with low load is increased, and the possibility that the terminal is subjected to priority reduction, switching, cell selection/reselection or redirection due to the fact that the load of the cell selected for access is high is reduced.
The cell selection priority value calculation function may be, for example: the cell preference value = current signal strength estimated value-current load high-low characteristic value x preset coefficient. Of course, it will be understood by those skilled in the art that the cell preference value calculation function may be defined as a function satisfying the "increasing function of the current signal strength estimate, and/or the decreasing function of the load level indicator".
In order to more clearly illustrate the embodiments of the present invention, the following provides preferred embodiments of the present invention.
The preferred embodiment provides a terminal and a method for accessing a network according to a network load condition, and realizes a method and a technology for accessing the network according to the network condition. Specifically, the preferred embodiment provides a terminal and a method related to load balancing in an LTE network. The general description of the preferred embodiment is as follows:
the preferred embodiment provides a method for a terminal to record whether a certain cell is a high-load cell:
when a terminal user works in a certain LTE network cell, if the service quality of the current terminal is reduced due to the overweight load of the cell or the current terminal is transferred to other cells through operations such as reselection, switching, redirection and the like, the terminal marks the current cell as a high-load cell.
The preferred embodiment provides a method for cell selection of a mobile terminal according to LTE network conditions, comprising:
when a terminal user accesses a cell or prepares to perform operations such as reselection, switching, redirection and the like, whether a target cell is a high-load cell is used as a standard for cell selection, and a cell with good signal strength and non-high load is preferentially selected.
According to an aspect of the present preferred embodiment, there is provided a method for recording whether a current serving cell is a high-load cell, including that a terminal determines whether a current cell is overloaded within a certain time and determines whether to record the current cell as the high-load cell according to a residence time of the current cell.
The recording of whether the load of the current cell is too high may include detecting a cause of load balancing, and recording and determining the cell residence time.
The detecting whether the cell is overloaded may include whether the terminal receives a Load Balancing related signaling (for example, when the terminal releases from the current cell RRC link, the cause value of rrcreate is Load Balancing taurrequired), and whether the current cell is recorded as the Load Balancing cell is determined according to the value of the timer T in the storage unit.
The recording as the load balancing cell may include that the terminal receives the load balancing related signaling and records that the current cell is the load balancing cell when the residence time of the current cell is less than a certain time, and adds 1 to the value of n in the storage unit.
The storage unit can comprise a timer storage unit and a load balancing storage unit, and the timer storage unit records the working time of the terminal in the current cell by using a case; the load balancing storage unit is used for recording the times of load balancing of the terminal in the cell.
According to an aspect of the present preferred embodiment, a method for deciding whether to access the cell according to a network load condition is provided, which includes that a terminal ranks cells existing in a current network according to a certain criterion, and selects an optimal cell for access.
The cell sorting according to a certain criterion may include that the terminal detects the signal strength of the current network cell (including but not limited to detection of RSRP values), sorts S values of the detected cells, and selects an optimal cell for registration.
The cell ranking criterion includes an extended S criterion, the original S criterion being: srxlev = Qrxlevmeas–(Qrxlevmin+Qrxlevminoffset) Pcompensation, i.e. the measured cell RSRP value detected by the terminal minus the minimum received strength of RSRP in the cell plus and minus an offset value. The extended S criteria may be: srxlev1= Srxlev-Mmlb, i.e. subtracting a load balancing bias value on the original S criterion.
The load balancing offset value may be an offset value calculated according to the number of load balancing times n (e.g., Mmlb =0.05n, where 0.05 is an example of a preset coefficient, and a specific coefficient may be fine-tuned). The load balancing times of a certain cell can be the total times of receiving the load balancing related signaling by the cell within a certain time, or can be the total times of receiving the load balancing related signaling by the cell within a certain time, and if the time interval between the receiving time of the load balancing related signaling and the time of accessing the cell is less than the set time interval after accessing the cell each time, the load balancing times are increased by a certain set value; otherwise, subtracting a certain set value from the load balancing times or clearing.
The cell sorting criterion may include sorting S values Srxlev1 of a current environmental cell, where the extended S criterion Srxlev1A = SrxlevA-Mmlb of the cell a, and the extended S criterion Srxlev1B = SrxlevB of the cell B, and when selecting, the sizes of Srxlev1A and rxlev1B need to be determined, and a large cell needs to be selected for access.
Further, the load balancing reasons recorded in the working process of the terminal include but are not limited to RRC released, and the relationship between the load balancing bias Mmlb and n is not limited to a linear proportional relationship, and may be specifically adjusted according to the actual conditions of the network.
Referring to FIG. 2, the preferred embodiment is described in more detail below by providing a preferred embodiment of the preferred embodiment:
after the UE is started, network search is carried out, the searched cells are sorted according to the expanded S criterion, the cell with the maximum Srxlev1 is selected for registration, a timer T is started for timing, and service use is carried out.
The network side issues an RRCrelease message to the UE in the using process of the user to indicate the UE to release RRC link;
after receiving the rrcrease message, the UE determines whether RRC link release indicated by the rrcrease message is initiated due to Load Balancing, that is, detects whether the rrcrease message carries a Load Balancing TAU Required cell, if the RRC link release indicated by the rrcrease message is initiated due to Load Balancing, determines whether a time duration of a timer is less than a set value (for example, one hour), and if the time duration is less than the set value, increases the value n in the storage unit by 1; and if the value is not less than the set value, controlling the timer to stop timing, setting the timing time to zero, and clearing the n value in the storage unit corresponding to the current cell.
Then, the UE completes the RRC link release action according to the RRCrelease message, redirects to other cells or keeps the RRC idle state or carries out cell selection again according to the expansion S rule.
If the UE subsequently accesses a certain cell, the timer is controlled to restart from zero.
As can be seen from fig. 3, when SrxlevA of the cell a is higher than SrxlevB of the cell B but the cell a has a higher load, such as 100, the terminal has performed multiple load balancing in the cell a, such as n =2, and the cell B has 10 loads that have not performed load balancing, and the extended S criterion Srxlev1A is smaller than Srxlev1B, so that the terminal can correctly recognize that the cell B can better ensure the service quality of the user and select to register to the cell B.
Currently, in the existing MLB technology, a cell base station sets appropriate cell handover and cell selection/reselection and redirection parameters on the basis of sensing the load level of a neighboring cell, so that an active or idle user is handed over from a high-load cell or resides in a suitable low-load neighboring cell. Or when the load of the current cell is heavier, the service quality of the user with lower priority is reduced, and the service quality of the user with high priority is preferentially ensured. The above process is completely determined by the network side of the base station, and the terminal has no initiative, that is, the terminal does not know whether the current network is overloaded before accessing a cell, and also does not know whether the service quality of the terminal can be ensured; in addition, because the actions such as switching and redirection between cells due to load balancing require exchanging load information, coordinating parameters, etc. between different cells, the signaling overhead of the network is also increased.
In view of the above problems, the present preferred embodiment aims to provide a specific method for a mobile terminal to actively select a cell according to a network load condition: the terminal records whether the service quality is reduced or switched/redirected to other cells in a certain cell for load balancing reasons, and if so, records the current cell as a load multi-cell;
when a terminal is ready to access a cell, cell selection is carried out according to the conditions of cell signal strength and the like, and whether the cell is a load multi-cell or not is used as a measurement parameter; preferentially selecting a cell with relatively good signal and low load so as to meet the high-quality service requirement of a user; the method and the device avoid the situation that a plurality of users access the same high-signal cell at the same time and the service requirements of the users cannot be guaranteed, and improve the user experience.
An embodiment of the present invention further provides a cell selection apparatus, including:
an obtaining module, configured to obtain respective load high-low characteristic values of at least two cells when cell selection is performed in the at least two cells, where a smaller load high-low characteristic value indicates a lower cell load;
a determining module, configured to determine, for each of the at least two cells, a cell selection priority value of each cell according to a cell selection priority value calculation function, and the load characteristic value and the current signal strength estimation value of each cell, where a larger cell selection priority value indicates a higher cell selection priority;
and the selecting module is used for selecting the cell with the largest cell priority value from the at least two cells as the target serving cell.
The device is used for the terminal.
Therefore, by the mode, the cell load high-low conditions are indicated by the load high-low characteristic values, the cell selection priority value is indicated by the cell selection priority value, and the functional relationship is established for the load high-low characteristic values, the current signal strength estimation value and the cell selection priority value of each cell by the cell selection priority value calculation function, so that the terminal is supported to perform cell selection according to the cell load conditions, and the flexibility of terminal cell selection is improved.
Among them, there may be:
for the obtaining module, the load characteristic value of any one of the at least two cells is generated as follows:
when a control signaling sent by a network side is received in the time period of any cell residence, judging whether the control signaling is a load balancing related control signaling or not, and acquiring a first judgment result;
and when the first judgment result is yes, updating the load high-low characteristic value of any cell according to a first load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is increased.
Wherein the updating the load characteristic value of any cell according to the first load characteristic value updating policy so that the load characteristic value of any cell is increased may include:
judging whether the delay time interval of the time of the terminal for receiving the load balancing related control signaling relative to the starting time of the time period is smaller than a preset time interval or not, and acquiring a second judgment result;
when the second judgment result is yes, updating the load characteristic value of any cell according to the first load characteristic value updating strategy, so that the load characteristic value of any cell is increased;
and when the second judgment result is negative, updating the load high-low characteristic value of any cell according to a second load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is reduced.
Furthermore, the cell preference value calculation function may be an increasing function of the current signal strength estimate and/or a decreasing function of the load level indicator.
Wherein the cell selection priority value calculation function may be: cell preferred level value = current signal strength estimated value-load high-low characteristic value × preset coefficient.
The embodiment of the invention also provides a terminal, which comprises the cell selection device. The terminal is, for example: LTE UE.
The foregoing is merely an example of the embodiments of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the embodiments of the present invention, and these modifications and decorations should also be regarded as the protection scope of the embodiments of the present invention.
Claims (11)
1. A cell selection method for a terminal, comprising:
when cell selection is carried out from at least two cells, obtaining respective load high-low characteristic values of the at least two cells, wherein the smaller the load high-low characteristic value is, the lower the cell load is;
for each cell of the at least two cells, determining the cell selection priority value of each cell according to a cell selection priority value calculation function, and the load characteristic value and the current signal strength estimation value of each cell, wherein the larger the cell selection priority value is, the higher the cell selection priority is;
selecting a cell with the largest cell priority value from the at least two cells as a target serving cell;
the terminal records whether the at least two cells are high-load cells or not, and obtains respective load high-low characteristic values of the at least two cells according to the recorded result;
the terminal records whether the at least two cells are high-load cells or not through the following modes:
recording whether the service quality of the at least two cells is reduced or switched to other cells for load balancing reasons or not, and recording the times of load balancing of the terminal in the at least two cells;
and determining whether to record the at least two cells as high-load cells according to the recorded load balancing times.
2. The method of claim 1, wherein for the step of obtaining the characteristic load value of each of the at least two cells when performing cell selection from the at least two cells, the characteristic load value of any one of the at least two cells is generated by:
when a control signaling sent by a network side is received in the time period of any cell residence, judging whether the control signaling is a load balancing related control signaling or not, and acquiring a first judgment result;
and when the first judgment result is yes, updating the load high-low characteristic value of any cell according to a first load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is increased.
3. The method of claim 2, wherein the updating the load high-low characteristic value of the any cell according to the first load high-low characteristic value updating strategy so that the load high-low characteristic value of the any cell is increased comprises:
judging whether the delay time interval of the time of the terminal for receiving the load balancing related control signaling relative to the starting time of the time period is smaller than a preset time interval or not, and acquiring a second judgment result;
when the second judgment result is yes, updating the load characteristic value of any cell according to the first load characteristic value updating strategy, so that the load characteristic value of any cell is increased;
and when the second judgment result is negative, updating the load high-low characteristic value of any cell according to a second load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is reduced.
4. The method according to claim 1, wherein the cell selection priority value calculation function is an increasing function of the current signal strength estimate and/or a decreasing function of the load level indicator.
5. The method of claim 4, wherein the cell selection priority value calculation function is: and the cell preferred priority value is the current signal strength estimated value-load high and low characteristic value multiplied by a preset coefficient.
6. A cell selection apparatus for a terminal, comprising:
an obtaining module, configured to obtain respective load high-low characteristic values of at least two cells when cell selection is performed in the at least two cells, where a smaller load high-low characteristic value indicates a lower cell load;
a determining module, configured to determine, for each of the at least two cells, a cell selection priority value of each cell according to a cell selection priority value calculation function, and the load characteristic value and the current signal strength estimation value of each cell, where a larger cell selection priority value indicates a higher cell selection priority;
a selecting module, configured to select a cell with a largest cell priority value from the at least two cells as a target serving cell;
the terminal records whether the at least two cells are high-load cells or not, and obtains respective load high-low characteristic values of the at least two cells according to the recorded result
The terminal records whether the at least two cells are high-load cells or not through the following modes:
recording whether the service quality of the at least two cells is reduced or switched to other cells for load balancing reasons or not, and recording the times of load balancing of the terminal in the at least two cells;
and determining whether to record the at least two cells as high-load cells according to the recorded load balancing times.
7. The apparatus of claim 6, wherein for the obtaining module, the characteristic load level of any of the at least two cells is generated by:
when a control signaling sent by a network side is received in the time period of any cell residence, judging whether the control signaling is a load balancing related control signaling or not, and acquiring a first judgment result;
and when the first judgment result is yes, updating the load high-low characteristic value of any cell according to a first load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is increased.
8. The apparatus of claim 7, wherein the updating the load high-low characteristic value of the any cell according to the first load high-low characteristic value updating strategy such that the load high-low characteristic value of the any cell is increased comprises:
judging whether the delay time interval of the time of the terminal for receiving the load balancing related control signaling relative to the starting time of the time period is smaller than a preset time interval or not, and acquiring a second judgment result;
when the second judgment result is yes, updating the load characteristic value of any cell according to the first load characteristic value updating strategy, so that the load characteristic value of any cell is increased;
and when the second judgment result is negative, updating the load high-low characteristic value of any cell according to a second load high-low characteristic value updating strategy, so that the load high-low characteristic value of any cell is reduced.
9. The apparatus according to claim 6, wherein the cell selection priority value calculation function is an increasing function of the current signal strength estimate and/or a decreasing function of the load level indicator.
10. The apparatus of claim 9, wherein the cell selection priority value calculation function is: and the cell preferred priority value is the current signal strength estimated value-load high and low characteristic value multiplied by a preset coefficient.
11. A terminal, characterised in that it comprises a cell selection apparatus according to any one of claims 6 to 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310439995.7A CN104469861B (en) | 2013-09-24 | 2013-09-24 | Cell selection method, device and terminal |
| PCT/CN2013/090088 WO2014134953A1 (en) | 2013-09-24 | 2013-12-20 | Cell selection method and device, and terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310439995.7A CN104469861B (en) | 2013-09-24 | 2013-09-24 | Cell selection method, device and terminal |
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| CN104469861A CN104469861A (en) | 2015-03-25 |
| CN104469861B true CN104469861B (en) | 2019-12-24 |
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| CN201310439995.7A Active CN104469861B (en) | 2013-09-24 | 2013-09-24 | Cell selection method, device and terminal |
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| US9854591B2 (en) * | 2015-04-09 | 2017-12-26 | Intel IP Corporation | Device, system and method of cell specific probability load balancing |
| CN106612526A (en) * | 2015-10-21 | 2017-05-03 | 中兴通讯股份有限公司 | Cell reselection method and device |
| CN109005574B (en) * | 2018-07-28 | 2021-08-06 | 努比亚技术有限公司 | Cell selection method, mobile terminal and computer readable storage medium |
| CN111526541B (en) * | 2019-02-02 | 2023-06-02 | 大唐移动通信设备有限公司 | Method and equipment for switching cells |
| CN111556533B (en) * | 2020-05-15 | 2023-07-18 | Oppo广东移动通信有限公司 | Cell residence control method and related equipment |
| CN111885674A (en) * | 2020-06-30 | 2020-11-03 | 广东小天才科技有限公司 | Cell selection method, lightweight terminal and network equipment |
| US11991625B2 (en) | 2021-06-30 | 2024-05-21 | Qualcomm Incorporated | Cell selection using multiple factors |
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