Cell selection method and related device

Abstract

The invention discloses a cell selection method and a related device, which are applied to the technical field of mobile communication, a first CDRX cell is selected from CDRX cells under the condition that a first condition is met by establishing radio resource control (RRC) connection with a first cell and entering a connection state, and the first CDRX cell is used as a cell accessed after the RRC connection is released. The CDRX cell can reduce the power consumption of the terminal equipment, so that the terminal equipment can be ensured to access the CDRX cell and the power consumption of the terminal equipment can be reduced by selecting the first CDRX cell as the access cell after the RRC connection is released, and the first condition comprises that the terminal equipment is in a standby state and a limited activity range in a connection state, so that the terminal equipment can be ensured to access the CDRX cell and the power consumption of the terminal equipment can be reduced. The limited activity range is the geographical range of which the area does not exceed the preset threshold value, so that the access to the CDRX cell does not influence the use of the user, and excessive power consumption is not brought by executing the scheme.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mobile communication technology, and in particular to a cell selection method and related apparatus. BACKGROUND

[0002] With the rapid development of mobile communication technology, the requirement for the endurance of terminal devices is increasing.

[0003] Connected Discontinuous Reception (CDRX) in the connected state is an effective energy-saving technology standardized by 3GPP, which can make the terminal device enter a low-power mode when there is a connection but no data transmission. However, since there are still cells without CDRX function, the terminal device not in a cell with CDRX function still has a high energy consumption problem. SUMMARY

[0004] In view of the above problems, the present application provides a cell selection method and related apparatus to achieve the purpose of reducing energy consumption.

[0005] The specific scheme is as follows:

[0006] The first aspect of the present application provides a cell selection method, comprising:

[0007] establishing a radio resource control (RRC) connection with a first cell to enter a connected state;

[0008] selecting a first CDRX cell from CDRX cells under the condition that a first condition is met, the first CDRX cell being a cell accessed after the RRC connection is released, and the first condition including being in a standby state and a limited activity range in the connected state, the limited activity range being a geographical range with an area not exceeding a preset threshold.

[0009] In some implementations, the selecting a first CDRX cell from CDRX cells includes:

[0010] selecting the first CDRX cell from the CDRX cells based on a period, a measurement parameter, and a number of radio link failures of the CDRX cells.

[0011] In some implementations, the period includes a long period and a short period, and the weight of the long period is greater than the weight of the short period.

[0012] In some implementations, the selecting a first CDRX cell from CDRX cells includes:

[0013] selecting the first CDRX cell from the CDRX cells based on at least one of a period of the CDRX cell and a received signal strength.

[0014] In some implementations, after the selecting the first CDRX cell from the discontinuous reception CDRX cells, further comprising:

[0015] releasing the restriction of the first CDRX cell as a cell accessed after the RRC connection is released, in a case where a second condition is met, the second condition comprising at least one of a preset time being reached, a non-standby state, a network signal strength being deteriorated, a data path connectivity being deteriorated, and the limited active range being exceeded.

[0016] In some implementations, before the selecting the first CDRX cell from the discontinuous reception CDRX cells, further comprising:

[0017] acquiring a CDRX cell list containing information of the CDRX cells, in a case where a third condition is met, the third condition comprising at least one of the CDRX cell list being absent, the CDRX cell list being present and all cells contained in the CDRX cell list being failed to be accessed, and an instruction of acquiring the CDRX cell list being received.

[0018] In some implementations, before the selecting the first CDRX cell from the discontinuous reception CDRX cells, further comprising:

[0019] acquiring the limited active range, in a case where a fourth condition is met, the fourth condition comprising at least one of an active range being absent, the active range being present and a location represented by acquired location information being out of the active range, and an instruction of acquiring the limited active range being received.

[0020] In some implementations, after the selecting the first CDRX cell from the discontinuous reception CDRX cells, further comprising:

[0021] releasing an RRC connection with the first cell;

[0022] accessing the first CDRX cell and establishing an RRC connection with the first CDRX cell.

[0023] A second aspect of the present application provides a terminal device, comprising:

[0024] at least one processor and a memory connected with the processor, wherein:

[0025] the memory is configured to store a computer program;

[0026] The processor is configured to execute the computer program to enable the gateway device to implement the cell selection method provided in the first aspect of the present application.

[0027] The third aspect of the present application provides a computer storage medium carrying one or more computer programs, which, when executed by an electronic device, enable the electronic device to implement the cell selection method provided in the first aspect or the second aspect of the present application.

[0028] The fourth aspect of the present application provides a computer program product comprising computer readable instructions which, when executed on an electronic device, cause the electronic device to implement the cell selection method provided in the first aspect of the present application.

[0029] The cell selection method and related apparatus provided by the present application can reduce the power consumption of the terminal device by establishing a radio resource control (RRC) connection with a first cell, entering a connected state, selecting a first discontinuous reception (CDRX) cell from the CDRX cells under the condition that a first condition is met, and accessing the cell after the RRC connection is released. Since the CDRX cell can reduce the power consumption of the terminal device, selecting the first CDRX cell as the cell to access after the RRC connection is released can ensure that the terminal device accesses the CDRX cell while reducing the power consumption of the terminal device. In addition, since the first condition includes being in a standby state and a limited activity range in the connected state, and the limited activity range is a geographical range with an area not exceeding a preset threshold, accessing the CDRX cell will not affect the use of the user, and the present solution will not cause excessive power consumption. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and other features, advantages, and aspects of the present disclosure will become more apparent by describing in detail the following specific embodiments thereof with reference to the attached drawings. Throughout the drawings, the same or similar reference numerals can refer to the same or similar elements. It should be understood that the drawings are schematic and elements and features are not necessarily to scale.

[0031] Figure 1 is a flowchart of a cell selection method provided by an embodiment of the present application;

[0032] Figure 2 is a structural example diagram of a terminal device provided by an embodiment of the present application;

[0033] Figure 3 is a flowchart of another cell selection method provided by an embodiment of the present application;

[0034] Figure 4 is another structural example diagram of a terminal device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described below in conjunction with the accompanying drawings. The terms used in the embodiments section of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0036] The embodiments of the present application are described below in conjunction with the accompanying drawings. The embodiments of the present application are described below in conjunction with the accompanying drawings. The person skilled in the art can know that, with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0037] The terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is only a way of distinguishing the objects with the same attributes in the description of the embodiments of the present application. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, so that the processes, methods, systems, products or equipment containing a series of units do not have to be limited to those units, but can include other units not clearly listed or inherent to these processes, methods, products or equipment.

[0038] The embodiments of the present application provide a method and device, which are applied to a communication system including a network device and a terminal device.

[0039] The communication system to which the embodiments of the present application can be applied can be a second generation (2G) communication system, a third generation (3G) communication system, can be a long term evolution (LTE) system, can also be a fifth generation (5G) communication system, can also be a hybrid architecture of LTE and 5G, can also be a 5G new radio (5G NR) system, and can also be a new communication system in future communication development.

[0040] The terminal device can be various forms, for example, a speakerphone, a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a vehicle-mounted terminal device, a wireless terminal device in self driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home, a wearable terminal device, an Internet of Things terminal device, etc. The terminal device can also be referred to as a user equipment (UE), an access terminal device, a vehicle-mounted terminal device, an industrial control terminal device, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus, etc. The terminal device can also be a fixed terminal device or a mobile terminal device.

[0041] The access network device can be a ground base station or a non-terrestrial network (NTN) device, which can also be referred to as a base station and / or a satellite access node (SAN).

[0042] The base station is any kind of device located at the network side and having a wireless transceiving function, including but not limited to: an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, a base station (gNodeB or gNB) or a transmission receiving point (TRP) in new radio (NR), a base station in subsequent evolution of 3GPP, an access node in a Wi-Fi system, a wireless relay node, a wireless backhaul node, etc. The base station can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc. The base station can include one or more co-sited or non-co-sited TRPs. The base station can also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario. The base station can communicate with the terminal device, or communicate with the terminal device through a relay station.

[0043] The terminal device that needs to be connected to a network, such as a terminal device with intercom function, needs to periodically send a heartbeat packet to a server in a standby state due to reasons such as NAT keep-alive. However, due to the characteristics that the network (such as an LTE network) needs to maintain a connection for at least 10 seconds, the terminal device with intercom function still consumes a large amount of power in the case of user inactivity standby.

[0044] Considering that the overall heartbeat packet process is in the order of hundreds of milliseconds, most of the 10-second connection is a waste of power. Discontinuous reception CDRX in the connected state is an effective energy-saving technology standardized by 3GPP, which can make the terminal enter a low-power mode when there is a connection (connected state) but no data transmission. However, for unknown reasons, network operators have not deployed the CDRX function in all base station cells, that is, there are still cells without the CDRX function.

[0045] The inventors found in the research process that if the terminal device can select a cell with the CDRX function for camping, the power consumption of the terminal device after establishing a radio resource control (RRC) connection with the cell (i.e., in the connected state) can be reduced.

[0046] Based on this, the embodiments of the present application provide a cell selection method and device, aiming at the terminal device in standby state and limited activity range, selecting a cell with CDRX function to access and establish a Radio Resource Control (RRC) connection, so as to reduce the power consumption of the terminal device.

[0047] The cell selection method provided by the embodiments of the present application can be applied to a terminal device. In the case of no special description, the "terminal device" of the embodiments of the present application can refer to the terminal device itself, a component (for example, a processor, a chip, or a chip system) in the terminal device, or a logical module or software capable of realizing all or part of the terminal device functions. The method comprises: entering a connected state by establishing an RRC connection with a first cell; in the case of satisfying a first condition, selecting a first CDRX cell from a discontinuous reception (CDRX) cell, the first CDRX cell being a cell accessed after the RRC connection is released, and the first condition comprising: being in standby state and limited activity range in the connected state, the limited activity range being a geographical range with an area not exceeding a preset threshold.

[0048] The cell selection method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0049] Figure 1 The cell selection method provided by the embodiments of the present application comprises the following steps:

[0050] S101, the terminal device establishes an RRC connection with a first cell, and the terminal device enters a connected state.

[0051] The first cell can be a CDRX cell or can not be a CDRX cell. The CDRX cell refers to a cell with CDRX function.

[0052] S102, the terminal device judges whether a preprocessing condition is satisfied. If yes, a preprocessing procedure is performed; if not, S106 is performed.

[0053] The preprocessing can be understood as obtaining an effective CDRX cell list and a limited activity range.

[0054] The preprocessing condition comprises a condition (i.e., a third condition) for obtaining an effective CDRX cell list and a condition (i.e., a fourth condition) for obtaining an effective limited activity range.

[0055] The condition (i.e., the third condition) for obtaining an effective CDRX cell list comprises at least one of c1-c3:

[0056] c1, there is no CDRX cell list.

[0057] In some implementations, the terminal device judges whether there is a CDRX cell list after starting up, and if not, condition c1 is met. In other implementations, the terminal device judges whether there is a CDRX cell list according to a preset period, and if not, condition c1 is met. Wherein, existence can be understood as existence in the terminal device or existence in the cloud, etc., which means that the terminal device can obtain.

[0058] c2, there is a CDRX cell list and all cells contained in the CDRX cell list are access failures.

[0059] Cell access failure means that there is a cell access failure history record, not an attempt to access a cell, that is, the terminal device is still in an RRC connection state with the first cell, not an attempt to access the cells contained in the CDRX cell list.

[0060] Condition c2 indicates that although there is a CDRX cell list, the cells contained in the CDRX cell list are all invalid cells, that is, cells that cannot be accessed.

[0061] c3, receiving an instruction to obtain a CDRX cell list.

[0062] In some implementations, the user operates based on a pre-configured user interaction interface, and the terminal device receives an instruction to obtain a CDRX cell list triggered by the operation.

[0063] The condition for obtaining a valid limited activity range (i.e., the fourth condition) includes at least one of d1-d3:

[0064] d1, there is no activity range. The activity range refers to the geographical range constituted by the location of the terminal device.

[0065] d2, there is an activity range and the location information indicates that the location is not within the activity range. For example, the terminal device stores an activity range, but at least one time of the terminal device is not within the activity range. Condition d2 indicates that the terminal device does not have a limited activity range.

[0066] d3, receiving an instruction to obtain a limited activity range.

[0067] It can be understood that not meeting the preprocessing condition means that the prerequisite for executing the cell selection mechanism of the present embodiment to reduce the energy consumption of the terminal device is not met, and therefore, the preprocessing process needs to be performed, that is, S103 is executed.

[0068] S103, the terminal device collects the location information of the terminal device and the information of the CDRX cell within a preset time length.

[0069] The preset time length for collecting the location information and the information of the CDRX cell can be the same or different.

[0070] It can be understood that the terminal device can satisfy one of the third condition and the fourth condition, for example, there can be no CDRX cell list, i.e., c1 is satisfied, but d1-d3 is not satisfied, and thus, in S103, the information corresponding to the satisfied condition is collected, such as the information of the CDRX cell, but the location information of the terminal device is not collected.

[0071] In S104, the terminal device determines whether the terminal device is in the limited activity range based on the location information of the terminal device, and if yes, S105 is performed, and if no, the process ends.

[0072] After the collection of the location information of the terminal device ends, it is determined whether the terminal device is in the limited activity range based on the collected location information, for example, a geographical range containing all the collected location information is generated based on the collected location information, and the area of the geographical range does not exceed a preset threshold.

[0073] It can be understood that if the terminal device is not in the limited activity range, it means that the movable range of the terminal device is large, and thus, the use of the following steps can cause a significant increase in the calculation amount, which in turn increases the energy consumption, which is contrary to the original intention of reducing the energy consumption, and thus, the process ends.

[0074] In S105, the terminal device generates a CDRX cell list based on the information of the CDRX cell.

[0075] The collected information of the CDRX cell includes: an identifier (cell Id) of the CDRX cell, a long cycle of the CDRX cell, a short cycle of the CDRX cell, a measurement parameter of the CDRX cell, and a number of radio link failures (RLF).

[0076] In some implementations, an example of the measurement parameter is a received signal strength measured by the terminal device, and the CDRX cell list is generated based on at least one of the received signal strength and the cycle of the CDRX cell, for example: CDRX cells with a received signal strength greater than a preset threshold value are selected as candidate cells, and then the candidate cells are sorted in ascending order of the long cycle length, and for CDRX cells with the same long cycle length, the short cycle length is further sorted in ascending order, to obtain a sequence of the CDRX cells, and the first N CDRX cells in the sequence of the CDRX cells are taken as the CDRX cell list.

[0077] In some implementations, the measurement parameter is an RSRP measured by the terminal device, and the CDRX cell list is generated based on the RSRP of the CDRX cell, the long period, the short period, and the number of RLFs.

[0078] For example, a ratio of a first value and a second value is taken as a score, where the first value is obtained based on the value generated according to the RSRP, the long period, and the short period, and the second value is obtained based on the number of RLFs. In one example, a weight of the long period is greater than a weight of the short period, so as to increase the influence of the long period on the first value, and make the first value closer to the actual situation of the cell. In one example, when the number of RLFs is 0, the second value is set to a preset value, such as 0.5, considering the characteristics of the ratio calculation, and when the number of RLFs is not 0, the second value is the number of RLFs. It can be understood that the first value represents a positive factor of the CDRX cell quality, and the second value represents a negative factor of the CDRX cell quality, and therefore, the score obtained in this way can more comprehensively reflect the quality of the CDRX cell.

[0079] After obtaining the score of each CDRX cell, the CDRX cells are sorted in descending order of the score, to obtain the CDRX cell list.

[0080] S106, the terminal device determines whether to enter the standby state, if yes, S107 is performed, if not, the process is ended or S106 is performed.

[0081] In this embodiment, entering the standby state means that the terminal device enters the standby state, and the standby state can be understood as that the user does not operate, but the terminal device is still in the connected state.

[0082] In some implementations, the standby state includes screen off and sending a heartbeat packet. That is, whether the terminal device is in the standby state is determined by determining whether the screen of the terminal device is off and whether a heartbeat packet is sent.

[0083] The heartbeat packet is an example of a regular small data packet used to trigger network connection, and is not limited thereto.

[0084] It can be understood that, in the standby state, the user does not operate, and therefore, accessing the CDRX cell does not affect the use of the user, and in the non-standby state, the user may operate the terminal device, and therefore, accessing the CDRX cell may affect the use of the user, and therefore, the subsequent steps are not performed.

[0085] In addition to taking the standby state and the priority activity range as the execution condition of the following steps, in some implementations, the power of the terminal device is also taken as one of the execution conditions, such as the remaining power of the terminal device is 30% of the total power, and the terminal device is in the standby state and the priority activity range, then S107 is executed.

[0086] Based on the user interface configuration related parameters, the user can adjust the energy saving strategy according to the own demand, and enhance the applicability of the system and the user satisfaction.

[0087] S107, the terminal device selects a first CDRX cell from the CDRX cell list.

[0088] For example, the first cell in the CDRX cell list is taken as the first CDRX cell.

[0089] It can be understood that S105 can also be executed after S106, and S105 and S107 can be summarized as: selecting a first CDRX cell from the CDRX cell. Based on the foregoing, one way of selecting a first CDRX cell from the CDRX cell is: selecting a first CDRX cell from the CDRX cell based on the period of the CDRX cell, the measurement parameter, and the number of radio link failures, and another way is: selecting a first CDRX cell from the CDRX cell based on at least one of the period of the CDRX cell and the received signal strength.

[0090] Selecting a first CDRX cell from the CDRX cell list, that is, selecting a CDRX cell with better quality based on the state of each CDRX cell, can further improve the success rate of subsequent access to the first CDRX cell, thereby ensuring the energy saving efficiency.

[0091] The selected first CDRX cell is used as a target cell for access after the RRC of the terminal device is released. After the terminal device accesses the first CDRX cell (see S110), if the terminal device is in the standby state and the limited activity range in the connected state, the energy consumption of the terminal device can be reduced.

[0092] In some implementations, in order not to affect the normal use of the terminal device, after the first CDRX cell is selected, whether to remove the restriction that the first CDRX cell is taken as the cell for access after the RRC connection is released is monitored, such as S108-S109.

[0093] S108, the terminal device judges whether the removal condition (i.e., the second condition) is met, if yes, S109 is executed, and if no, S108 is executed.

[0094] The first CDRX cell accessed after the RRC connection is released can be referred to as a locked first CDRX cell, and the release of the restriction that the first CDRX cell is accessed after the RRC connection is released can be referred to as an unlocked first CDRX cell.

[0095] The release condition (the second condition) includes at least one of b1-b5:

[0096] b1, a preset time is reached.

[0097] Before the preset time is reached, the energy consumption of the terminal device needs to be reduced, and after the preset time is reached, the mechanism of reducing the energy consumption of the terminal device based on the first CDRX cell is released. Exemplarily, the preset time is a time configured by a user, such as a certain year, month, day, and hour.

[0098] b2, a non-standby state.

[0099] The non-standby state indicates that the user is likely to use the terminal device, and the CDRX cell can cause the terminal device in use to be unable to normally receive network information, so the locking of the first CDRX cell needs to be released.

[0100] The sensor data is data sensed by a sensor arranged on the terminal device. In some implementations, the non-standby state can be determined based on the sensor data. Exemplarily, the sensor data is pressure sensor data or light intensity sensor data of a pressure sensor or a light intensity sensor arranged on the terminal device. In the case where the user holds the terminal device, the pressure sensor data is greater than a preset pressure threshold, or the light intensity sensor data is less than a preset light intensity threshold, which indicates that the user is using the terminal device, and therefore the terminal device is in a non-standby state.

[0101] b3, network signal strength is deteriorated.

[0102] The network signal strength can be measured by the terminal device. Exemplarily, the network signal strength is measured. If the network signal strength is higher than a preset strength threshold, it indicates that the network signal strength is not deteriorated, otherwise, it indicates that the network signal strength is deteriorated.

[0103] b4, data path connectivity is deteriorated.

[0104] The data path connectivity can be measured by the terminal device by sending a probe packet. Exemplarily, the data path connectivity is measured multiple times. If the number of times of measurement results being connected reaches a preset number threshold, it indicates that the data path connectivity is not deteriorated, otherwise, the data path connectivity is deteriorated.

[0105] b3 and b4 both represent a decrease (deterioration) in network quality. If the network quality of the locked cell deteriorates, greater transmission power is required, and the power saving purpose cannot be achieved. Therefore, in this case, the lock is released, and the terminal device can search for a cell with better quality by itself, thereby facilitating the guarantee of better network quality.

[0106] b5, exceeding the limited activity range.

[0107] Exceeding the limited activity range means that the position of the terminal device exceeds the limited activity range. For example, the position data of the terminal device is collected according to a preset period, and at least one piece of position data represents a position that exceeds the limited activity range.

[0108] As described above, if the moving range of the terminal device exceeds the limited activity range, and the first CDRX cell is still used to reduce power consumption, the calculation amount of the terminal device may be significantly increased, and power consumption may also be increased. Therefore, in the case of b5, the lock on the first CDRX cell is released.

[0109] S109, the terminal device releases the lock on the first CDRX cell.

[0110] The release of the lock can be understood as no longer taking the first CDRX cell as a cell for subsequent access in priority. Instead, the cell access process and the like are performed based on the existing protocol, which will not be described here.

[0111] The above conditions are used to unlock the target cell, and the purpose is to ensure that the network experience of the user during the service activity is not affected while saving power.

[0112] S110, after the RRC connection is released, the terminal device accesses the first CDRX cell and establishes an RRC connection with the first CDRX cell.

[0113] It can be understood that after the terminal device establishes an RRC connection with the first CDRX cell, the terminal device intermittently receives a physical downlink control channel (PDCCH), thereby reducing power consumption.

[0114] It can be understood that S108-S110 do not limit the execution order. For example, S108 is executed after S107, S109 is executed after the release condition is met, and S110 can be executed after the RRC connection is released.

[0115] From Figure 1 As shown in the flowchart, if the terminal device is in the limited activity range and in the standby state in the RRC connected state, the first CDRX cell is selected as a cell to be accessed after the RRC connected state is released, so that after the first CDRX cell is accessed and the RRC connected state is entered, power consumption can be reduced.

[0116] Figure 2 is a structural schematic diagram of a terminal device disclosed by an embodiment of the present application, the terminal device comprising: an application (referred to as AP), a geographic location positioning module (referred to as GLS), a base station information collection and analysis module (referred to as BCA), a state monitoring and decision module (referred to as SMD), and an intelligent locking and unlocking strategy (referred to as ILS).

[0117] Figure 3 is a flowchart of a cell selection method realized by cooperation of various modules shown in the figure, comprising the following steps: Figure 2

[0118] S201, after the terminal device is powered on, the AP judges whether there is an effective CDRX cell list and a limited activity range, if at least one of the effective CDRX cell list and the limited activity range does not exist, S202 is executed, otherwise, S208 is executed.

[0119] The trigger judgment condition of "powering on" is only an example, the AP can also trigger the judgment at a certain judgment period, etc.

[0120] S202, the AP displays a user interface and receives a collection time based on the user interface.

[0121] The user interface is used to guide the user to set the collection time, for example, the user inputs the collection time of 6 hours based on the user interface. The collection time is the time for collecting the CDRX cell list and the limited activity range.

[0122] The collection time of collecting the information of the cell and collecting the location information can be the same or different.

[0123] In some implementations, the AP sets a timer based on the collection time, and the timer sends information of reaching the timing time to the AP after reaching the timing time.

[0124] It can be understood that S202 is an optional step, and the collection time can also not be set by the user, and the AP uses the pre-configured collection time.

[0125] In some implementations, the AP displays the user interface by calling a user interface and setting (referred to as UIS) module, in addition to being used to receive the collection time, the user interface can also display the information of locking the target cell after locking the target cell in the subsequent steps. In addition, the user interface can also receive and display the remaining power which is one of the conditions for locking the target cell customized by the user.

[0126] S203, the AP sends a location information collection request, and correspondingly, the GLS receives the location information collection request. ​

[0127] It can be understood that, in the case where there is no limited activity range, S203 is executed after S202, and in the case where there is a limited activity range, S203 is not executed, and correspondingly, the step of setting the collection time of the location information is not executed.

[0128] S204, the AP sends a cell information collection request, and correspondingly, the BCA receives the cell information collection request.

[0129] It can be understood that, in the case where there is no valid CDRX cell list, S204 is executed after S202, and in the case where there is a valid CDRX cell list, S204 is not executed, and correspondingly, the step of setting the collection time of the information of the cell is not executed.

[0130] The execution order of S203 and S204 is not limited.

[0131] S205, the GLS collects the location information of the terminal device.

[0132] Illustratively, the location information includes location coordinates. The GLS can use GPS, Wi-Fi assisted positioning, and other technologies to achieve real-time geographic positioning of the mobile terminal, thereby obtaining the location information of the terminal device.

[0133] S206, the BCA collects the information of the cell.

[0134] Illustratively, the information of the cell includes: the identification of the cell, the minimum signal strength of the cell, the number of RLFs, and the identification of whether the cell supports CDRX.

[0135] In some implementations, the GLS and the BCA collect the corresponding information at respective periods.

[0136] S207, after the collection time is reached, the AP triggers the GLS and the BCA to report the collected information, and correspondingly, the ILS receives the reported information.

[0137] It can be understood that, here, the collection of location information and the information of the cell is taken as an example, in the case where only the location information or the information of the cell is collected, the AP triggers the GLS or the BCA to report the collected information.

[0138] The ILS receives the reported information, that is, in the case where the GLS collects the location information, the ILS receives the location information collected by the GLS, and in the case where the BCA collects the information of the cell, the ILS receives the information of the cell collected by the BCA.

[0139] S208, the ILS selects a target cell based on the received information.

[0140] The target cell is the selected optimal CDRX cell, i.e., the aforementioned first CDRX cell. The manner of selecting the target cell can refer to S105 and S107. S209, the AP sends state monitoring and decision instructions, and correspondingly, SMD receives the state monitoring and decision instructions.

[0141] S210, SMD monitors the state and position of the terminal device.

[0142] The state refers to the used state of the terminal device, including standby and used (non-standby). The state is indicated by whether the screen is on or off, data transmission, and the like.

[0143] The position refers to the position of the terminal device, which can be understood as that the GLS transmits the position information of the terminal to the SMD.

[0144] S211, SMD determines whether the locking condition is met, if yes, S213 and subsequent steps are executed, if not, S212 is executed.

[0145] The locking condition includes that the terminal device is in a standby state and the position is within a limited activity range.

[0146] S212, SMD sends the unlocking reason, and correspondingly, the AP receives the unlocking reason.

[0147] The unlocking reason is that the terminal device is in a non-standby state, or the position is not within the limited activity range.

[0148] S213, SMD queries the target cell from the ILS.

[0149] S214, SMD locks the target cell.

[0150] S215, SMD sends a locking success notification, and correspondingly, the AP receives the locking success notification.

[0151] S216, after receiving the locking success notification, the AP sends an unlocking monitoring instruction, and correspondingly, the SMD receives the unlocking monitoring instruction.

[0152] S217, SMD determines whether the unlocking condition is met, if yes, S218 is executed, if not, S217 is executed, i.e., continue to monitor whether the unlocking condition is met (not drawn in S217). Figure 3

[0153] S218, SMD sends an unlocking instruction, and correspondingly, the ILS receives the unlocking instruction.

[0154] S219, ILS sends an unlocking confirmation message, and correspondingly, SMD receives the unlocking confirmation message.

[0155] ​S220, the SMD sends a release lock notification, and the AP receives the release lock notification accordingly.

[0156] S221, the AP releases the target cell.

[0157] An alternative process to S216-S220 is as follows:

[0158] S222, the AP receives a user-triggered disable lock request.

[0159] S223, the AP sends a release lock notification, and the SMD receives the release lock notification accordingly.

[0160] S224, the SMD sends a release lock instruction, and the ILS receives the release lock instruction accordingly.

[0161] S225, the ILS sends a release lock confirmation message, and the SMD receives the lock confirmation message accordingly.

[0162] S226, the SMD sends a release lock notification, and the AP receives the release lock notification accordingly.

[0163] It can be understood that if the target cell is not unlocked before the terminal device releases the RRC connection, the terminal device randomly accesses the target cell after releasing the RRC connection, and if the target cell enters the connected state, the energy consumption of the terminal device can be reduced because the target cell is a CDRX cell. If the target cell has been unlocked before the terminal device releases the RRC connection, subsequent processes such as random access are performed according to the existing standard protocol.

[0164] Figure 4 A structural diagram of a terminal device 200 is provided, which includes a bus 201, a processor 202, a communication interface 203, and a memory 204. The processor 202, the memory 204, and the communication interface 203 communicate through the bus 201.

[0165] The bus 201 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0166] The processor 202 can be any one or more of a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor (MP), or a digital signal processor (DSP), etc.

[0167] The memory 204 can include volatile memory, such as random access memory (RAM), and non-volatile memory, such as read-only memory (ROM), a floppy disk drive, a hard disk drive (HDD), or a solid-state drive (SSD).

[0168] The memory 204 can be configured to store codes related to the steps performed by the gateway device according to the embodiments described above. The processor 202 can be configured to implement the functions of the terminal device in the cell selection method according to the embodiments described above by running the codes stored in the memory 204. In an embodiment, the terminal device is a walkie-talkie terminal.

[0169] The embodiments of the present application also provide a terminal device, which includes a connection module and a selection module.

[0170] The connection module is configured to enter a connected state by establishing a radio resource control (RRC) connection with a first cell. The selection module is configured to select a first discontinuous reception (CDRX) cell from the CDRX cells as a cell to access after the RRC connection is released, when a first condition is met. The first condition includes that the terminal device is in a standby state or a limited active range in the connected state. The limited active range is a geographical range with an area not exceeding a preset threshold.

[0171] The embodiments of the present application also provide a computer program product, which includes computer readable instructions. When the computer readable instructions are run on an electronic device, the electronic device can implement any one of the cell selection methods provided by the embodiments of the present application.

[0172] The embodiments of the present application also provide a computer readable storage medium, which carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any one of the cell selection methods provided by the embodiments of the present application.

[0173] In addition, it should be noted that the apparatus embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment. In addition, the connection relationship between the modules in the apparatus embodiments provided in the present application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines.

[0174] Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software and the necessary general hardware, and of course can also be implemented by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. Generally, functions completed by computer programs can be easily implemented by corresponding hardware, and the specific hardware structure for implementing the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better embodiment. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer floppy disk, U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc., including a plurality of instructions to make a computer device (which can be a personal computer, training device, or network device, etc.) execute the methods described in various embodiments of the present application.

[0175] In the above embodiments, all or part can be realized by software, hardware, firmware or any combination thereof. When realized by software, it can be realized in the form of a computer program product in whole or in part.

Claims

1. A cell selection method, characterized in that: include: Entering a connected state by establishing a radio resource control RRC connection with the first cell; When the first condition is met, a first CDRX cell is selected from the discontinuous reception CDRX cells, and the first CDRX cell is used as the cell to be accessed after the RRC connection is released. The first condition includes: being in a standby state and a limited activity range in the connected state, and the limited activity range is a geographical range whose area does not exceed a preset threshold.

2. The method according to claim 1, characterized in that The selecting the first CDRX cell from the discontinuous reception CDRX cells includes: The first CDRX cell is selected from the CDRX cells based on a cycle, a measurement parameter, and a number of radio link failures of the CDRX cells.

3. The method according to claim 2, characterized in that The cycles include a long cycle and a short cycle, and the weight of the long cycle is greater than the weight of the short cycle.

4. The method according to claim 1, wherein The selecting the first CDRX cell from the discontinuous reception CDRX cells includes: The first CDRX cell is selected from the CDRX cells based on at least one of a period and a received signal strength of the CDRX cells.

5. The method according to any one of claims 1 to 4, characterized in that After selecting the first CDRX cell from the discontinuous reception CDRX cells, the method further includes: If the second condition is met, the restriction on using the first CDRX cell as the cell to be accessed after the RRC connection is released is lifted, and the second condition includes: reaching a preset time, non-standby state, network signal strength deterioration, data path connectivity deterioration, and exceeding at least one of the limited activity range.

6. The method according to any one of claims 1 to 4, characterized in that Before selecting the first CDRX cell from the discontinuous reception CDRX cells, the method further includes: When the third condition is met, a CDRX cell list is obtained, and the CDRX cell list contains information about the CDRX cell. The third condition includes: the CDRX cell list does not exist, the CDRX cell list exists and all cells included in the CDRX cell list fail to access, and at least one of an instruction to obtain the CDRX cell list is received.

7. The method according to any one of claims 1 to 4, characterized in that Before selecting the first CDRX cell from the discontinuous reception CDRX cells, the method further includes: The limited activity range is acquired when a fourth condition is satisfied, the fourth condition including at least one of: no activity range exists, an activity range exists and the position indicated by the acquired position information is not within the activity range, and an instruction to acquire the limited activity range is received.

8. The method according to any one of claims 1 to 4, characterized in that After selecting the first CDRX cell from the discontinuous reception CDRX cells, the method further includes: releasing the RRC connection with the first cell; Access the first CDRX cell and establish an RRC connection with the first CDRX cell.

9. A terminal device, characterized in that: include: at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is configured to execute the computer program to enable the gateway terminal to implement the cell selection method according to any one of claims 1 to 8.

10. A computer storage medium carrying one or more computer programs, which, when executed by an electronic device, enables the electronic device to implement the cell selection method according to any one of claims 1 to 8.

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