CN117425185A - PLMN reselection method and system based on cell power consumption - Google Patents

Abstract

The invention discloses a PLMN reselection method and a PLMN reselection system based on cell power consumption, wherein the method comprises the following steps: acquiring standby power consumption of a terminal in a current service cell; constructing an LPPLMN list; when the standby power consumption is continuously greater than the first THRESHOLD value THRESHOLD within a certain rated time period _scell Triggering PLMN background searching based on the LPPLMN list; and performing PLMN reselection based on the PLMN background search result. The invention can reduce standby power consumption, and can reduce the perception of clients by the background PLMN searching process when no suitable cell is found and the context of the service cell is still reserved.

Description

PLMN reselection method and system based on cell power consumption

Technical Field

The invention belongs to the field of mobile communication, and particularly relates to a PLMN reselection method and system based on cell power consumption.

Background

After the idle state, the standard 3GPP TS36.304 defines that the LTE terminal triggers cell reselection through monitoring the measured values of the serving cell and the neighbor cells so as to ensure the reliability and the continuity of the service. The neighbor cells may include co-frequency, inter-frequency, and inter-system cells. The flow of the LTE network for measuring the neighbor cells is as follows:

1. the terminal reads the system broadcast message, acquires the measurement threshold SIntraSearch (Release 9 or more version also considers SIntraSearch p and SIntraSearch q): the same frequency measurement start threshold, snonIntraSearch (Release 9 above versions SnonIntraSearch p and SnonIntraSearch q): different frequency/different system measurement starting threshold and service carrier frequency, candidate frequency point reselection priority, definition of reselection priority: 0-7, wherein the priority of all cells under the same frequency is the same, and the higher the value is, the higher the priority is;

2. the terminal measures the current serving cell RSRP result and calculates Srxlev (Release 9 version RSRQ result and calculates square), and the system parameters of network broadcasting, namely SIntraSearch (Release 9 version above also considers SIntraSearch P and SIntraSearch Q), snoneIntraSearch (Release 9 version above SnoneIntraSearch P and SnoneIntraSearch Q), and compares the determined measurement behaviors;

for services when the priority indicated by the system message is higher than the candidate frequency points of the serving cell, the UE always performs measurement on the candidate frequency points with high priority;

for the same frequency/same priority cell, if the serving cell is less than or equal to the SIntraSearch (the same frequency measurement start threshold, release9 version, square < = SIntraSearch q or Srxlev < = snonlin search p), the UE performs measurement, otherwise does not perform measurement;

when the system message indicates that the priority is lower than the cell, if the S value of the serving cell is less than or equal to snonlmasearch (inter-frequency/inter-system measurement start threshold, release9 version, srxlev < = snonlmasearchp or square < = snonlmasearchq), performing measurement, otherwise not measuring;

if the snonltrasearch parameter is not broadcast in the system message, the UE starts inter-frequency cell measurement.

If the SINTRASearch parameter is not broadcast in the system message, the UE starts the same frequency cell measurement.

If SnonIntraSearchP, snonIntraSearchQ, SIntraSearchP, SIntraSearchQ is provided in the system message, replacing Sintrasearch and Snonintersearch configurations to be used as threshold configurations;

if the RRC Release carries the configuration of the cell reselection priorities, measuring the candidate frequency points according to the new configuration priorities;

after the idle state DRX of the serving cell is determined, according to the measurement criterion, the better the serving cell signal is, the less neighbor cell measurement is performed, even the neighbor cell is not required to be measured, and the standby power consumption is lower;

the 3gpp ts23.251 standard defines two cellular network sharing scenarios, one being MOCN: multi-Operator Core Network, one RAN being connectable to a plurality of operator network nodes. The RAN may be co-constructed by a plurality of operators, or one of the operators may be constructed separately while the other operators lease the RAN network of that operator. The other is GWCN Gateway Core Network, which refers to shared RAN and partial network (VMSC/SGSN). The MVNO is Mobile Virtual Network Operator, and provides a network operation mode based on a network sharing technology, and the MVNO realizes virtual network operation mainly by renting networks of other operators and independently constructing a small number of network nodes (such as all or part of networks, service networks, charging systems and the like), thereby realizing quick network construction and quick operation. The MVNO has an own issued SIM/USIM card, the card issued by the MVNO is inserted, and the actual network selection process is to access to the shared operator network signed by the MVNO in a roaming mode, so that the networking requirement of own clients is met.

The 3gpp ts23.122 standard defines a division of terminal PLMN selection into an automatic mode and a manual mode, in the automatic mode, PLMN selection is arranged according to RPLMN > EHPLMN > HPLMN > UPLMN > OPLMN > other PLMN signals high quality random arrangement > other PLMN signals poor condition, other PLMNs except other PLMNs are terminal startup and read from a SIM card, RPLMN is stored in an EFloc file and is a PLMN registered before last startup, register PLMN, wherein EHPLMN and HPLMN are PLMNs similar to operators, there may be a plurality of PLMNs and user-controlled PLMN lists, and OPLMN is an operator-controlled PLMN list. In order to better control the terminal to select a subscribed roaming network, the MVNO or the terminal user generally embeds the subscribed PLMN into the UPLMN/OPLMN of the SIM/USIM card, and updates the problem through OTA upgrade of the card, so as to control roaming operators, such as two operators a, B subscribed; operator a may be preferred by controlling the order a > B before and after the OPLMN list. In addition, in roaming scenario, if the selected PLMN has a higher priority PLMN (generally two PLMNs with the same country code MCC), the selected PLMN searches for a higher priority PLMN network regularly, and the timed period is also read out from the SIM/USIM card, for example, the a priority is higher than the B, and is in the UPLMN/OPLMN list, but B is also in the RPLMN, so after starting up, the process of searching for a PLMN regularly is started, and if there is an a PLMN in the actual network, the selected PLMN is reselected and registered in the a PLMN.

Definition of existing standards shortcomings to MVNO screening: the above-mentioned PLMN is generally set by the factory along with the SIM card, and then can be configured by the signaling mode OTA upgrade card defined by the protocol standard, the above-mentioned method can customize the PLMN which is preferably registered according to the cost of the package, but lacks the PLMN priority sequence of UPLMN/OPLMN along with changing the network state of the actual operation Shang Bu, especially in the fixed place of the Internet of things, the long-line terminal (LTE catM, cat0, cat1, cat4 terminal) sometimes considers standby power consumption instead of the package, but according to the standard solidification preferred PLMN process, if the signal of the PLMN cell arranged in front is worse, the neighbor cell measurement is more, the idle standby power consumption is large, and the standby time is also reduced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a PLMN reselection method based on cell power consumption, which comprises the following steps:

step S101, standby power consumption of a terminal in a current service cell is obtained;

step S103, constructing an LPPLMN list;

step S105, when the standby power consumption is continuously greater than the first THRESHOLD within a certain rated period _scell Triggering PLMN background searching based on the LPPLMN list;

and step S107, performing PLMN reselection based on the PLMN background search result.

Wherein, before the step S101, the method further comprises:

the terminal is started up, enters an automatic mode, performs PLMN selection, cell selection and registers a serving cell.

Wherein, the step S101 includes:

reading a system broadcast message;

acquiring a same-frequency measurement starting threshold, a different-frequency/different-system measurement starting threshold and a service carrier frequency, and reselecting the priority of a candidate frequency point;

measuring the current serving cells RSRP and RSRQ;

calculating Srxlev, square based on the RSRP, RSRQ;

and calculating the number of detected and measured cells in unit time based on the Srxlev and the square.

Wherein the detected and measured cell at least comprises: the method comprises the steps of measuring a serving cell, measuring a high-priority serving cell, detecting a same frequency point, measuring a same frequency cell, detecting a different frequency point, measuring a different frequency cell, detecting a different system UTRAN frequency point, measuring a different system UTRAN cell and measuring a different system GREAN frequency point.

In the step S105, the PLMN background search based on the LPPLMN list includes:

updating the LPPLMN list sequence, and updating the PLMN of the current service cell to the final position;

blocking the high priority PLMN search flow;

performing LPPLMN cell background searching based on the LPPLMN list;

triggering a new PLMN reselection flow when the new PLMN is switched, and updating the PLMN to a first position in a UPLMN/OPLMN list;

before deleting, the position is at UPLMN/OPLMN, and stored in SIM/USIM card;

and recovering the high-priority PLMN search state.

Wherein when the new PLMN is satisfied, triggering a new PLMN reselection procedure, including:

and triggering a new PLMN reselection flow when the cell power consumption of the LPPLMN searched in the current background is lower than the current service cell power consumption.

Wherein when the N is _{DesLPPLMNCell} Less than N _{DesRegisterCell} Triggering a new PLMN reselection flow;

wherein N is _{DesRegisterCell} Representing a currently registered serving cell, which computes N _{DesRegisterCell} ＝N _{DesMeasrueAll} +H _RegisterCell ；

N _{DesLPPLMNCell} Indicating current context search LPPLMN cell, which computes N _{DesLPPLMNCell} ＝N _{DesMeasrueAll} +H _LPPLMNCell ；

N _{DesMeasrueAll} Indicating all cell quantized values possibly measured in idle state under the expected current serving cell;

H _RegisterCell a positive weight value representing the current serving cell;

H _LPPLMNCell a negative weighting value representing the current serving cell;

H _RegisterCell and H _LPPLMNCell Is tested by the actual test. And if the PLMN of the current serving cell is in the UPLMN/OPLMN list, adding the PLMN containing the serving cell MCC in the UPLMN/OPLMN list into the LPPLMN list, and placing the PLMN of the current serving cell in the first position of the LPPLMN.

Wherein the LPPLMN cell context search includes a centralized search and an LPPLMN priority search.

The invention also provides a PLMN reselection system based on cell power consumption, which comprises:

the acquisition module is used for acquiring standby power consumption of the terminal in the current service cell;

a building module for building an LPPLMN list;

a triggering module for continuously exceeding a first THRESHOLD when the standby power consumption is greater than a certain rated time period _scell Triggering PLMN background searching based on the LPPLMN list;

and the reselection module is used for performing PLMN reselection based on the PLMN background search result.

Compared with the prior art, the invention can reduce standby power consumption, and can reduce the perception of clients by the background PLMN searching process when no suitable cell is found and the context of the service cell is still reserved.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

fig. 1 is a flowchart illustrating a PLMN reselection method based on cell power consumption according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating an entire idle mode according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two.

It should be understood that although the terms first, second, third, etc. may be used to describe … … in embodiments of the present invention, these … … should not be limited to these terms. These terms are only used to distinguish … …. For example, the first … … may also be referred to as the second … …, and similarly the second … … may also be referred to as the first … …, without departing from the scope of embodiments of the present invention.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or device comprising such element.

Alternative embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Embodiment 1,

As shown in fig. 1, the invention discloses a PLMN reselection method based on cell power consumption, which comprises the following steps:

step S101, standby power consumption of a terminal in a current service cell is obtained;

step S103, constructing an LPPLMN list;

step S105, when the standby power consumption is continuously greater than the first THRESHOLD within a certain rated period _scell Triggering PLMN background searching based on the LPPLMN list;

and step S107, performing PLMN reselection based on the PLMN background search result.

Embodiment II,

The invention provides a PLMN reselection method based on cell power consumption, which comprises the following steps:

step S101, standby power consumption of a terminal in a current service cell is obtained;

step S103, constructing an LPPLMN list;

step S105, when the standby power consumption is continued within a certain rated periodIs greater than a first THRESHOLD value THRESHOLD _scell Triggering PLMN background searching based on the LPPLMN list;

and step S107, performing PLMN reselection based on the PLMN background search result.

Wherein, before the step S101, the method further comprises:

the terminal is started up, enters an automatic mode, performs PLMN selection, cell selection and registers a serving cell.

Wherein, the step S101 includes:

reading a system broadcast message;

acquiring a same-frequency measurement starting threshold, a different-frequency/different-system measurement starting threshold and a service carrier frequency, and reselecting the priority of a candidate frequency point;

measuring the current serving cells RSRP and RSRQ;

calculating Srxlev, square based on the RSRP, RSRQ;

and calculating the number of detected and measured cells in unit time based on the Srxlev and the square.

Wherein the detected and measured cell at least comprises: the method comprises the steps of measuring a serving cell, measuring a high-priority serving cell, detecting a same frequency point, measuring a same frequency cell, detecting a different frequency point, measuring a different frequency cell, detecting a different system UTRAN frequency point, measuring a different system UTRAN cell and measuring a different system GREAN frequency point.

In the step S105, the PLMN background search based on the LPPLMN list includes:

updating the LPPLMN list sequence, and updating the PLMN of the current service cell to the final position;

blocking the high priority PLMN search flow;

performing LPPLMN cell background searching based on the LPPLMN list;

triggering a new PLMN reselection flow when the new PLMN is switched, and updating the PLMN to a first position in a UPLMN/OPLMN list;

before deleting, the position is at UPLMN/OPLMN, and stored in SIM/USIM card;

and recovering the high-priority PLMN search state.

Wherein when the new PLMN is satisfied, triggering a new PLMN reselection procedure, including:

and triggering a new PLMN reselection flow when the cell power consumption of the LPPLMN searched in the current background is lower than the current service cell power consumption.

Wherein when the N is _{DesLPPLMNCell} In N _{DesRegisterCell} Triggering a new PLMN reselection flow;

wherein N is _{DesRegisterCell} Representing a currently registered serving cell, which computes N _{DesRegisterCell} ＝N _{DesMeasrueAll} +H _RegisterCell ；

N _{DesLPPLMNCell} Indicating current context search LPPLMN cell, which computes N _{DesLPPLMNCell} ＝N _{DesMeasrueAll} +H _LPPLMNCell ；

N _{DesMeasrueAll} Indicating all cell quantized values possibly measured in idle state under the expected current serving cell;

H _RegisterCell a positive weight value representing the current serving cell;

H _LPPLMNCell a negative weighting value representing the current serving cell;

H _RegisterCell and H _LPPLMNCell Is tested by the actual test.

And if the PLMN of the current serving cell is in the UPLMN/OPLMN list, adding the PLMN containing the serving cell MCC in the UPLMN/OPLMN list into the LPPLMN list, and placing the PLMN of the current serving cell in the first position of the LPPLMN.

Wherein the LPPLMN cell context search includes a centralized search and an LPPLMN priority search.

The invention also provides a PLMN reselection system based on cell power consumption, which comprises:

the acquisition module is used for acquiring standby power consumption of the terminal in the current service cell;

a building module for building an LPPLMN list;

a triggering module for generating a trigger signal when the standby power consumption is continuously greater than a certain rated time periodFirst THRESHOLD value THRESHOLD _scell Triggering PLMN background searching based on the LPPLMN list;

and the reselection module is used for performing PLMN reselection based on the PLMN background search result.

Third embodiment,

1. And the terminal is started up and in an automatic mode, PLMN selection is carried out, cell selection is carried out, and a service cell is registered.

2. Defining an empty LPPLMN list, if the serving cell PLMN is in the UPLMN/OPLMN list, updating the PLMN in the UPLMN/OPLMN list, which is the same as the MCC of the serving cell, into the LPPLMN list, and updating the current serving cell PLMN into the LPPLMN first position.

Wherein UPLMN (User Controlled PLMN ): the terminal selects PLMN when the user selects the network manually, and the USIM card stores the PLMN; OPLMN (Operator Controlled PLMN operator controlled PLMN): when the operator burns the card, the operator PLMN which has signed a roaming agreement with the operator is used as OPLMN to write into the USIM card as the suggestion of the following user to select the network.

3. Calculating the power consumption measurement value of the current serving cell if the time T is successful in registering the cell _scell Later, the measured value is greater than the THRESHOLD _scell Triggering PLMN background searching process, searching PLMN from LPPLMN list, otherwise, keeping working current service cell. Srxlev and Squal are cell Rx level and quality values, respectively, in dB, with other parameters received by the UE through the broadcasted SIB.

Wherein Srxlev = Qrxlevmeas-Qrxlevmin;

Squal＝Qqualmeas-Qqualmin：

srxlev and Squal are cell Rx level and quality values, respectively, in dB, with other parameters received by the UE through the broadcasted SIB.

Power consumption measurement calculation flow: the terminal reads a system broadcast message, acquires a same-frequency measurement starting threshold, an inter-frequency/inter-system measurement starting threshold and a service carrier frequency, reselects a priority level of a candidate frequency point, calculates Srxlev by measuring a current serving cell RSRP result, calculates a square by measuring an RSRQ result, calculates the number of detected and measured cells in unit time, and comprises the steps of measuring the serving cell, measuring a high-priority serving cell, detecting an inter-frequency point, measuring the same-frequency cell, detecting the inter-frequency point, measuring the inter-frequency cell, detecting the inter-system UTRAN frequency point, measuring the inter-system UTRAN cell and measuring the inter-system GREAN frequency point.

Since the measurement period per unit time and the DRX of the serving cell are related to different access networks. Therefore, two processes of measuring a cell are performed, tuning is performed to a corresponding frequency point detection cell, if the detected cell meets the minimum measurement requirement, the corresponding cell is measured later, and a plurality of cells are measured on one frequency point; typically, a detection period detects a frequency point cell signal, and a measurement period measures all cells under a frequency point.

The object value is detected and measured in a unit time:

N _MeasrueAll ＝N _Scell +N _HighPriCell +N _{IntraEutranCell} +N _{InterEutranCell} +N _UtranCell +N _GeranCell ；

N _MeasrueAll the method includes the steps that the terminal needs to detect and measure the serving cell in unit time of the serving cell, and the same frequency, different frequency/different system frequency points and the number of the cells;

N _Scell representing the unit time measurement number of the serving cell;

T _drx DRX configuration value ranges (0.32 s,0.64s,1.28s,2.56 s) indicating idle state of serving cell

N _HighPriCell Representing the number of the detection and measurement needed in the unit time of the high priority cell;

N _{HighPriNeiCell} indicating the number of cells which are detected to meet the measurement of all high priority;

N _layers representing all high priority pilot frequenciesThe number of different system frequency points;

T _{higher_priority_search} representing the period of detection of all high-priority different frequencies/different system frequency points; w (W) _{Detect_HighPriFreq} Indicating that the power consumption of the measuring and detecting consumption terminals is different in general case relative to the specific gravity measurement, and W is currently taken _{Detect_HighPriFreq} ＝1；

P _highpri Indicating whether there is high priority frequency point configuration, there is a value of 1, there is no value of 0

N _{IntraEutranCell} The number of the same-frequency cells needing to be detected and measured in unit time is represented;

T _{detect，EUTRAN_Intra} the same-frequency measurement period is represented, DRX is different, the value is also different, and the value range (1.28 s,2.56 s) is configured;

N _IntraNeiCell indicating the number of all the cells meeting the measurement of the same frequency by detection;

T _{detect，EUTRAN_Intra} the same frequency detection period is represented, DRX is different, the value is also different, and the value range (11.52 s,17.92s,32s and 58.88 s) is configured;

W _{Detect_Intra} indicating that the power consumption of the measuring and detecting consumption terminals is different in general case relative to the specific gravity measurement, and W is currently taken _{Detect_Intra} ＝1；

P _intra Indicating that the same frequency cell condition is satisfied, the value 1 exists, and the value 0 does not exist.

N _{InterEutranCell} The number of different frequency cells needing to be detected and measured in unit time is represented;

T _{measure，EUTRAN_Inter} representing different frequency measurement periods, DRX is different in value, and a value range (1.28 s,2.56 s) is configured;

K _{EUTRAN_InteCarrier} indicating that the number of different frequencies of the measurement cell is detected, wherein the value of the number is less than or equal to the value of SIB5 configuration;

N _InterNeiCell the small indication detects the number of all cells meeting the measurement of the same frequency;

T _{detect，EUTRAN_Inter} representing different frequency detection periods, DRX is different, the values are also different, and the value ranges (11.52 s,17.92s,32s and 58.88 s) are configured; w (W) _{Detect_Intra} Indicating that the power consumption of the measuring and detecting consumption terminals is different in general case relative to the specific gravity measurement, and W is currently taken _{Detect_Intra} ＝1；

P _intra Indicating that the measurement pilot frequency cell condition is satisfied, the value 1 exists, and the value 0 does not exist.

N _UtranCell Indicating the number of UTRAN (including TDSCDMA and WCDMA) cells needing to be detected and measured in unit time;

T _{measure，UTRAN} indicating UTRAN (including TDSCDMA and WCDMA) measurement period, DRX is different and its value is also different;

U _{UTRAN_Carrier} the number of frequency points of the detection existence measurement cell is represented, and the value of the frequency points is less than or equal to the value of SIB configuration;

N _{UTRAN_NeiCell} indicating that the detection meets the requirement of measuring the number of all UTRAN cells;

T _{detect，UTRA} indicating UTRAN (including TDSCDMA and WCDMA) sounding periods, DRX is different for different values;

W _{Detect_UTRAN} indicating that the power consumption of the measuring and detecting consumption terminals is different in general case relative to the specific gravity measurement, and W is currently taken _{Detect_UTRAN} ＝1；

P _utran Indicating that the cell condition of the UTRAN system is satisfied, the value 1 exists, and the value 0 does not exist.

N _GERANCell Representing the number of GERAN (including GSM/GPRS/EDGE) cells needing to be detected and measured in unit time;

T _{measure，GSM} representing a GERAN measurement period, the DRX being different and its value being different;

G _{Gsm_Carrier} the number of frequency points of the detection existence measurement cell is represented, and the value of the frequency points is less than or equal to the value of SIB configuration;

N _GsmNeiCell indicating the number of all GSM cells which are detected and satisfied with measurement;

P _geran indicating that the condition of measuring the cell of the GERAN system is satisfied, the value 1 exists, and the value 0 does not exist.

If the SIB3 message of the system only carries S _IntraSearch And S is _{nonIntraSearch} And S is _rxlev ＞S _IntraSearch ，

Or alternatively

If the system SIB3 message carries S _IntraSearch And S is _rxlev ＞S _IntraSearchP And S is _qual ＞S _IntraSearchQ ，

Then N _MeasrueAll ＝N _Scell +N _HighPriCell

If the SIB3 message of the system only carries S _IntraSearch And S is _{nonIntraSearch} And S is _rxlev ≤S _IntraSearch And S is _rxlev ＞S _{nonIntraSearch} ，

Or alternatively

If the system SIB3 message carries S _IntraSearch And S is _{nonIntraSearch} Different combinations, i.e. serving cell signal conditions require detection and measurement of co-frequency/high priority cells, do not satisfy detection and measurement of inter-frequency/inter-system cells,

if satisfy S _rxlev ≤S _IntraSearchP Or S _qual ≤S _IntraSearchQ And S is _rxlev ＞S _{nonIntraSearchP} And S is _qual ＞S _{nonIntraSearchQ} ，

Then

N _MeasrueAll ＝N _Scell +N _HighPriCell +N _{IntraEutranCell} 。

If the SIB3 message of the system only carries S _IntraSearch And S is _{nonIntraSearch} And S is _rxlev ≤S _IntraSearch And S is _rxlev ≤S _{nonIntraSearch}

Or alternatively

If the system SIB3 message carries S _IntraSearch And S is _{nonIntraSearch} Different combinations, i.e. serving cell signal conditions need to detect and measure co-frequency/high priority cells, also inter-frequency/inter-system cells,

if satisfy S _rxlev ≤S _IntraSearchP Or S _qual ≤S _IntraSearchQ And S is _rxlev ≤S _{nonIntraSearchP} Or S _qual ≤S _{nonIntraSearchQ} ，

Then

N _MeasrueAll ＝N _Scell +N _HighPriCell +N _{IntraEutranCell} +N _{InterEutranCell} +N _UtranCell +N _GeranCell 。

4. PLMN context search procedure

If P (N) _MeasrueAll )＞THRESHOLD _scell And reaching the registration cell success time T _scell And if the cell searched in the background meets the requirement of switching a new PLMN, triggering a new PLMN reselection flow, updating the PLMN to the first position in the UPLMN/OPLMN list, deleting the previous position in the UPLMN/OPLMN, saving the current position in the SIM/USIM card, and restoring the high-priority PLMN search state.

In a certain embodiment, a lower comparison calculation method for comparing the measured power consumption of two cells first considers the power consumption influencing factors of the idle state cell:

1) The idle state DRX of the detected cell has a relation, and the larger the DRX is, the lower the power consumption is;

2) Comparing the current Srxlev and square of the measured cell with the same-frequency measurement threshold and the different-frequency/different-system measurement threshold, if the signal is lower to trigger the same-frequency, the different-frequency/different-system measurement is used for searching PLMN cells due to the background, the situation that the actual neighbor cells cannot be measured in a gap way is not possible, the different-frequency/different-system frequency points are measured by the configuration of the system message, and generally, the more the frequency points are, the more the number of the large-probability cells is.

3) The higher the priority of different frequency/different system frequency point configuration, the more frequency points are, the more the number of the large probability cells is.

The general calculation formula is as follows:

N _{DesMeasrueAll} ＝N _DesScell +N _{DesHighPriCell} +N _{DesIntraEutranCell} +N _{DesInterEutranCell} +N _DesUtranCell +N _DesGeranCell

N _{DesMeasrueAll} indicating all cell quantized values that may be measured in idle state in the hope of registering the cell;

N _DesScell a serving cell indicating a desired measurement registration;

N _DesScell indicating that all inter-frequency/inter-system cells of high priority are desired to be measured;

N _{DesIntraEutranCell} indicating that the same frequency cell is expected to be measured;

N _{DesInterEutranCell} indicating that a measurement of inter-frequency cells is desired;

N _DesUtranCell indicating a desire to measure UTRAN system cells;

N _DesGeranCell indicating that GERAN system cells are desired to be measured.

N for serving cell _{DesMeasrueAll} As a result of the calculation, a value H is added _RegisterCell The cells searched by the LPPLMN background need to be subtracted by a value H _LPPLMNCell Under the condition of equivalent cell power consumption, PLMN reselection does not occur, and the two values are given through actual tests, so that the current cell is kept as far as possible in the cell with equivalent power consumption, and ping-pong is avoided.

Definition N _{DesRegisterCell} Representing a currently registered serving cell, which computes N _{DesRegisterCell} ＝N _{DesMeasrueAll} +H _RegisterCell

Definition N _{DesLPPLMNCell} Indicating current context search LPPLMN cell, which computes N _{DesLPPLMNCell} ＝N _{DesMeasrueAll} +H _LPPLMNCell 。

Wherein H is _RegisterCell The positive weight is expressed to the current service cell, the N value of the current service cell is the same, the current service cell is reserved without triggering reselection, and the ping-pong PLMN reselection effect of the service cell and the to-be-selected cell is reduced;

H _LPPLMNCell and a negative weight is expressed for the cell to be selected, the N value of the cell is the same, the cell is reserved in the serving cell, the reselection is not triggered, and the ping-pong PLMN reselection effect of the serving cell and the cell to be selected is reduced.

Comparing the two, and confirming the cell with smaller power consumption.

In another embodiment, the background search LPPLMN cell method is determined by two methods, centralized search and LPPLMN priority search:

1) Concentrated search: based on all PLMNs in the LPPLMN list, carrying out full-band search supported by a terminal capacity range, counting all the measuring thresholds, measuring frequency points and the like of the same frequency, different frequencies and different systems which can calculate Srxlev, square, and uniformly comparing the number of cells to be measured to obtain an optimal cell;

the optimal cell takes Min { N } _{DesLPPLMNCell_0} …N _{DesLPPLMNCell_i} …N _{DesLPPLMNCell_max-1} ，N _{DesRegisterCell} Cell of } condition, N _{DesLPPLMNCell_i} The value range i is that the PLMN code in the LPPMN corresponds to lppmn= { plmn_0, plmn_1, …, plmn_max }, according to the previous specification plmn_max = current registered cell PLMN,

if PLMN in LPPLMN does not have cell after full frequency band searching, N thereof _{DesLPPLMNCell} 65535 is taken.

2) Searching according to the LPPLMN priority sequence, and sequentially searching LPPMN= { PLMN_0, PLMN_1, … and PLMN_max } PLMN at n-type DRX intervals.

If the PLMN cannot be searched, N thereof _{DesLPPLMNCell} Taking 65535;

if the currently searched PLMN cell, N thereof _{DesLPPLMNCell} If the absolute value VGC is better than the absolute value VGC, stopping searching, for example, DRX=2.56 s, no high priority cell exists, and Srxlev and Squal do not reach the same frequency, different frequency/different system threshold;

otherwise, the optimal cell takes Min { N } _{DesLPPLMNCell_0} ...N _{DesLPPLMNCell_i} …N _{DesLPPLMNCell_max-1} ，N _{DesRegisterCell} Cell of } condition, N _{DesLPPLMNCell_i} The value range i is that the PLMN number corresponds to lppmn= { plmn_0, plmn_1, …, plmn_max }, and plmn_max = current registered cell PLMN according to the previous specification.

Example IV

As shown in fig. 1, the present invention further provides a PLMN reselection system based on cell power consumption, which includes:

the acquisition module is used for acquiring standby power consumption of the terminal in the current service cell;

a building module for building an LPPLMN list;

trigger module for use inWhen the standby power consumption is continuously greater than the first THRESHOLD value THRESHOLD within a certain rated time period _scell Triggering PLMN background searching based on the LPPLMN list;

and the reselection module is used for performing PLMN reselection based on the PLMN background search result.

Fourth embodiment,

The disclosed embodiments provide a non-transitory computer storage medium storing computer executable instructions that perform the method steps described in the embodiments above.

It should be noted that the computer readable medium described in the present disclosure may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this disclosure, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present disclosure, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, fiber optic cables, RF (radio frequency), and the like, or any suitable combination of the foregoing.

The computer readable medium may be contained in the electronic device; or may exist alone without being incorporated into the electronic device.

Computer program code for carrying out operations of the present disclosure may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any kind of network, including a local Area Network (AN) or a Wide Area Network (WAN), or can be connected to AN external computer (for example, through the Internet using AN Internet service provider).

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The units involved in the embodiments of the present disclosure may be implemented by means of software, or may be implemented by means of hardware. Wherein the names of the units do not constitute a limitation of the units themselves in some cases.

The foregoing description of the preferred embodiments of the present invention has been presented for purposes of clarity and understanding, and is not intended to limit the invention to the particular embodiments disclosed, but is intended to cover all modifications, alternatives, and improvements within the spirit and scope of the invention as outlined by the appended claims.

Claims (10)

1. A PLMN reselection method based on cell power consumption comprises the following steps:

step S101, standby power consumption of a terminal in a current service cell is obtained;

step S103, constructing an LPPLMN list;

step S105, when the standby power consumption is continuously greater than the first THRESHOLD within a certain rated period _scell Triggering PLMN background searching based on the LPPLMN list;

and step S107, performing PLMN reselection based on the PLMN background search result.

2. The method of claim 1, wherein prior to said step S101, further comprising:

the terminal is started up, enters an automatic mode, performs PLMN selection, cell selection and registers a serving cell.

3. The method of claim 1, wherein said step S101 comprises:

reading a system broadcast message;

acquiring a same-frequency measurement starting threshold, a different-frequency/different-system measurement starting threshold and a service carrier frequency, and reselecting the priority of a candidate frequency point;

measuring the current serving cells RSRP and RSRQ;

calculating Srxlev, square based on the RSRP, RSRQ;

and calculating the number of detected and measured cells in unit time based on the Srxlev and the square.

4. A method as claimed in claim 3, wherein the detected and measured cells comprise at least: the method comprises the steps of measuring a serving cell, measuring a high-priority serving cell, detecting a same frequency point, measuring a same frequency cell, detecting a different frequency point, measuring a different frequency cell, detecting a different system UTRAN frequency point, measuring a different system UTRAN cell and measuring a different system GREAN frequency point.

5. The method of claim 1, wherein in the step S105, the PLMN context search based on the LPPLMN list includes:

updating the LPPLMN list sequence, and updating the PLMN of the current service cell to the final position;

blocking the high priority PLMN search flow;

performing LPPLMN cell background searching based on the LPPLMN list;

triggering a new PLMN reselection flow when the new PLMN is switched, and updating the PLMN to a first position in a UPLMN/OPLMN list;

before deleting, the position is at UPLMN/OPLMN, and stored in SIM/USIM card;

and recovering the high-priority PLMN search state.

6. The method of claim 5, wherein said triggering a new PLMN reselection procedure when a handoff of a new PLMN is satisfied comprises:

when the cell power consumption of the LPPLMN searched in the current background is lower than the current service cell power consumption, triggering a new PLMN reselection flow.

7. The method of claim 6, wherein

When said N is _{DesLPPLMNCell} Less than N _{DesReglsterCell} When triggeringA new PLMN reselection procedure;

wherein N is _{DesReglsterCell} Representing a currently registered serving cell, which computes N _{DesReglsterCell} ＝N _{DesMeasreuAll} +H _RegisterCell ；

N _{DesLPPLMNCell} Indicating current context search LPPLMN cell, which computes N _{DesLPPLMNCell} ＝N _{DesMeasrueAll} +H _LPPLMNCell ；

N _{DesMeasrueAll} Indicating all cell quantized values possibly measured in idle state under the expected current serving cell;

H _RegisterCell a positive weight value representing the current serving cell;

H _LPPLMNCell a negative weighting value representing the current serving cell;

H _RegisterCell and H _LPPLMNCell Is tested by the actual test.

8. The method of claim 1, wherein if the PLMN of the current serving cell is in a UPLMN/OPLMN list, adding a PLMN in the UPLMN/OPLMN list containing a serving cell MCC to the LPPLMN list, and placing the PLMN of the current serving cell in the LPPLMN first location.

9. The method of claim 1, wherein the LPPLMN cell context search comprises a centralized search and an LPPLMN priority search.

10. A PLMN reselection system based on cell power consumption, comprising:

the acquisition module is used for acquiring standby power consumption of the terminal in the current service cell;

a building module for building an LPPLMN list;

a triggering module for continuously exceeding a first THRESHOLD when the standby power consumption is greater than a certain rated time period _scell Triggering PLMN background searching based on the LPPLMN list;

and the reselection module is used for performing PLMN reselection based on the PLMN background search result.