CN115866701A

CN115866701A - Cell reselection method and device and terminal equipment

Info

Publication number: CN115866701A
Application number: CN202211438006.8A
Authority: CN
Inventors: 李松
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-03-28

Abstract

The disclosure relates to a cell reselection method, a cell reselection device and a terminal device, and is applied to the terminal device, wherein the method comprises the following steps: acquiring network configuration information, wherein the network configuration information comprises a neighbor cell list, and the neighbor cell list comprises a plurality of neighbor cells; receiving a system message of each adjacent cell, wherein the system message comprises the transmitting power of the adjacent cell; determining the path loss of each adjacent cell based on the transmitting power of the adjacent cells, and acquiring the theoretical transmitting power of the terminal corresponding to each adjacent cell according to the path loss of each adjacent cell; if the theoretical transmitting power of the terminal is larger than the maximum transmitting power of the terminal, deleting the adjacent cell from the adjacent cell list to obtain an alternative list, wherein the alternative list comprises at least one alternative cell; and controlling the terminal equipment to reside in the alternative cells in the alternative list. The method and the device can enable the terminal equipment to stay in the network to the cell with smaller path loss so as to ensure the successful establishment of the uplink.

Description

Cell reselection method and device and terminal equipment

Technical Field

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

Background

With the continuous development of the internet and electronic technology, terminal devices such as mobile phones and tablet personal computers (PADs) are more and more widely applied in the life of people. After the terminal device resides in the current serving cell, the terminal device may obtain a neighboring cell list in a system message broadcast of the serving cell to detect the signal change conditions of the currently residing serving cell and neighboring cells, so as to perform cell reselection, and ensure that the terminal device resides in a cell with better signal all the time. Therefore, how to better perform cell reselection is an urgent technical problem to be solved.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides a cell reselection method, apparatus and terminal device.

According to a first aspect of the embodiments of the present disclosure, there is provided a cell reselection method, applied to a terminal device, the method including:

acquiring network configuration information, wherein the network configuration information comprises a neighbor cell list, and the neighbor cell list comprises a plurality of neighbor cells;

receiving a system message of each adjacent cell, wherein the system message comprises the transmitting power of the adjacent cell;

determining the path loss of each adjacent cell based on the transmitting power of the adjacent cells, and acquiring the theoretical transmitting power of the terminal corresponding to each adjacent cell according to the path loss of each adjacent cell;

if the theoretical transmitting power of the terminal is larger than the maximum transmitting power of the terminal, deleting the adjacent cell from the adjacent cell list to obtain an alternative list, wherein the alternative list comprises at least one alternative cell;

and controlling the terminal equipment to reside in the alternative cells in the alternative list.

Optionally, determining a path loss of each neighboring cell based on the transmit power of the neighboring cells includes:

and determining the path loss of each adjacent cell based on the transmitting power of each adjacent cell and the receiving power of the corresponding terminal equipment.

Optionally, controlling the terminal device to camp on the candidate cell in the candidate list includes:

and selecting a target cell meeting preset conditions from the alternative list, and controlling the terminal equipment to reside in the target cell.

Optionally, selecting a target cell meeting a preset condition from the candidate list includes:

acquiring the received signal strength, the received signal quality and the uplink signal strength of each alternative cell;

and determining a target reference value of each candidate cell according to the received signal strength, the received signal quality and the uplink signal strength, and taking the candidate cell with the maximum target reference value as the target cell.

Optionally, determining a target reference value of each candidate cell according to the received signal strength, the received signal quality, and the uplink signal strength includes:

respectively carrying out normalization processing on the received signal strength, the received signal quality and the uplink signal strength;

and carrying out weighted summation on the normalized received signal strength, the normalized received signal quality and the normalized uplink signal strength to obtain a target reference value of each candidate cell.

acquiring at least one of the signal strength and the cell priority of each candidate cell;

a target cell is selected from the candidate list based on at least one of the signal strength and the cell priority.

Optionally, obtaining the theoretical transmit power of the terminal corresponding to each neighboring cell according to the path loss of each neighboring cell includes:

and calculating the theoretical transmitting power of the terminal corresponding to each adjacent cell based on the path loss of each adjacent cell, the number of uplink scheduled resource blocks, the expected received signal strength of the network, the path compensation loss factor and the compensation factor of the coding mode.

According to a second aspect of the embodiments of the present disclosure, there is provided a cell reselection apparatus, applied to a terminal device, the apparatus including:

the information acquisition module is configured to acquire network configuration information, wherein the network configuration information comprises a neighbor cell list, and the neighbor cell list comprises a plurality of neighbor cells;

a receiving module configured to receive a system message of each neighboring cell, the system message including a transmission power of the neighboring cell;

the determining module is configured to determine the path loss of each neighboring cell based on the transmitting power of the neighboring cells, and acquire the theoretical transmitting power of the terminal corresponding to each neighboring cell according to the path loss of each neighboring cell;

the terminal comprises a candidate list acquisition module, a neighbor list acquisition module and a neighbor list selection module, wherein the candidate list acquisition module is configured to delete the neighbor cell from a neighbor list to obtain a candidate list if the theoretical transmission power of the terminal is greater than the maximum transmission power of the terminal, and the candidate list comprises at least one candidate cell;

and the control module is configured to control the terminal device to reside in the alternative cells in the alternative list.

According to a third aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the cell reselection method provided by the first aspect of the present disclosure.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a terminal device, including:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to:

receiving a system message of each neighboring cell, wherein the system message comprises the transmitting power of the neighboring cell;

determining the path loss of each neighboring cell based on the transmission power of the neighboring cells, and acquiring the theoretical transmission power of the terminal corresponding to each neighboring cell according to the path loss of each neighboring cell;

and controlling the terminal device to camp on the alternative cell in the alternative list.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

after the network configuration information is obtained, the neighbor list is screened by using the theoretical transmission power of the terminal to obtain an alternative list, so that the accuracy of cell reselection can be improved. Specifically, the network configuration information can be obtained, the network configuration information can include a neighbor cell list, on the basis, system messages of neighbor cells in the neighbor cell list are received, then, the path loss of each neighbor cell is determined based on the transmission power of the neighbor cells in the system messages, the theoretical transmission power of a terminal corresponding to each neighbor cell is obtained according to the path loss of each neighbor cell, if the theoretical transmission power of the terminal is greater than the maximum transmission power of the terminal, the neighbor cells are deleted from the neighbor cell list to obtain an alternative list, and finally, the terminal device is controlled to reside in the alternative cells in the alternative list. Therefore, the terminal equipment can be resided in the cell with smaller path loss, and the successful establishment of the uplink can be further ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 illustrates an application scenario in which a cell reselection method is applied according to some embodiments.

Fig. 2 is a flow chart illustrating a method of cell reselection according to an exemplary embodiment.

Fig. 3 is a flow chart illustrating a method of cell reselection in accordance with another exemplary embodiment.

Fig. 4 is a block diagram illustrating a cell reselection apparatus in accordance with an exemplary embodiment.

FIG. 5 is a block diagram illustrating an apparatus in accordance with an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

At present, after a terminal device resides in a current serving cell, it acquires a neighboring cell list in a system message broadcast of the serving cell to detect the signal change conditions of the currently residing serving cell and neighboring cells, so as to perform cell reselection, and ensure that the terminal device always resides in a cell with better signal. When the terminal equipment reselects the cell, the terminal equipment can preferentially select the cell with good signal quality so as to keep the wireless network of the terminal equipment in the optimal state.

When a terminal device selects a cell in the prior art, the quality of a downlink signal is mainly considered, that is, the terminal device can camp on the cell as long as the received power of a base station is good enough. However, the received power of the base station is good enough, and the uplink data may be normally sent to the network side device without representing that the terminal device resides in the cell, that is, the terminal device is likely to reside in the cell with large path loss, which may further affect the user experience.

In order to solve the above problem, the cell reselection method, apparatus and terminal device provided in the embodiments of the present application can enable the terminal device to reside in a cell with a small path loss, so as to ensure successful establishment of an uplink.

An application environment of the cell reselection method provided in this embodiment is described below, as shown in fig. 1, the application environment 100 may include a terminal device 101, a first network device 102, and a second network device 103, where the terminal device 101, the first network device 102, and the second network device 103 may be connected in a wired or wireless manner.

The terminal 101 may be a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like. Specifically, the terminal device 101 may be a mobile phone (mobile phone), a tablet computer or a computer with a wireless transceiving function, and may also be a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city (smart city), a smart home, a vehicle-mounted terminal, and the like.

The first network-side device 102 and the second network-side device 103 may include an access network device, may also include a core network device, may also include a device (e.g., a server) of a service provider, and the like, without limitation. The first network side device 102 and the second network side device 103 are mainly used for implementing functions of resource scheduling, radio resource management, radio access control, and the like of the terminal device 101. Specifically, the first network-side device 102 and the second network-side device 103 may be any one of a small base station, a wireless access point, a transmission point (TRP), a Transmission Point (TP), and some other access node.

In some embodiments, a cell corresponding to the first network-side device 102 may be referred to as a small-path-loss cell, where the path loss for transmitting uplink data is small when the terminal device 101 resides in the small-path-loss cell, a cell corresponding to the second network-side device 103 may be referred to as a large-path-loss cell, and the path loss for transmitting uplink data is large when the terminal device 101 resides in the large-path-loss cell. The terminal device 101 may be located at a cell edge corresponding to the first network-side device 102 and the second network-side device.

It should be noted that the application environment 100 may include other network-side devices besides the first network-side device 102 and the second network-side device 103.

Fig. 2 is a flowchart illustrating a cell reselection method according to an exemplary embodiment, where the cell reselection method may be applied to the terminal device in fig. 1, as shown in fig. 2, and includes the following steps.

In step S11, network configuration information is acquired.

In this embodiment, the network configuration information may include reselection parameters of a cell, where the reselection parameters of the cell may include parameters such as a neighboring cell list and a reselection threshold, where the neighboring cell list may include multiple neighboring cells. In addition, the terminal device may obtain the network configuration information by obtaining a broadcast message, that is, the network configuration information may be sent to the terminal device by broadcasting.

As an optional manner, the terminal device may detect whether the signal quality of the current located server cell is less than a specified threshold, and if it is determined that the signal quality of the current located cell is less than the specified threshold, the network configuration information may be obtained in this embodiment of the present application. In addition, the terminal device may periodically detect whether the signal quality of the server cell in which it is currently located is less than a specified threshold.

As another optional manner, in the embodiment of the present application, the network configuration information may also be periodically obtained, that is, after the terminal device camps on the current serving cell, it may obtain the network configuration information in a system message broadcast of the serving cell.

As another optional manner, in the embodiment of the present application, it may also be determined whether the terminal device performs a service operation, and if it is determined that the terminal device is not performing the service operation, the present application may obtain the network configuration information. The service operation may include receiving or transmitting service data.

As another optional manner, in this embodiment of the present application, it may also be determined whether the terminal device is located at the edge of the current cell, and if it is determined that the terminal device is located at the edge of the current cell, the network configuration information may be obtained.

The terminal device may acquire the network configuration information when the at least one condition is satisfied. For example, the terminal device may obtain the network configuration information when it is determined that the terminal device is at a cell edge. For another example, the terminal device may also obtain the network configuration information when it is determined that the terminal device is located at a cell edge and the signal quality of the current cell is determined to be less than a specified threshold. How to obtain the network configuration information by combining the plurality of conditions is not specifically limited, and may be selected according to actual situations.

In step S12, a system message of each neighboring cell is received.

It is known from the above description that the network configuration information may include a neighbor cell list, and the neighbor cell list includes a plurality of neighbor cells. After the network configuration information is obtained, the embodiment of the application can receive the system message of each neighboring cell. The system message may include the transmit power of each neighbor cell in the neighbor cell list.

As an optional manner, after obtaining the system message of each neighboring cell, the terminal device may screen the neighboring cells in the neighboring cell list based on the system message. Specifically, the method and the device may determine the path loss of each neighboring cell based on the transmit power of the neighboring cell included in the system message, that is, step S13 is performed.

In step S13, the path loss of each neighboring cell is determined based on the transmission power of the neighboring cells, and the theoretical transmission power of the terminal corresponding to each neighboring cell is obtained according to the path loss of each neighboring cell.

In this embodiment, the path loss of the neighboring cell may be an average power loss of a signal, which is introduced by the transmission distance, the transmission environment, and the like, of the transmitter and the receiver, and is a quantity strongly related to the transmission distance, the transmission environment, the carrier frequency, and the like. In a communication system, path loss can be simply understood as power loss when a signal transmitted by a network side device is transmitted to a terminal device position.

As an optional manner, when determining the path loss of each neighboring cell based on the transmit power of the neighboring cells, the embodiment of the present application may determine the path loss of each neighboring cell based on the transmit power of each neighboring cell and the receive power of the corresponding terminal device. In a specific embodiment, the difference between the transmit power of each neighboring cell and the receive power of the corresponding terminal device may be used as the path loss of the neighboring cell.

As an example, the neighbor cell list includes a neighbor cell a, and the terminal device determines that the transmission power of the neighbor cell a is 10 through a broadcast message sent by the neighbor cell a. In addition, the terminal device determines that the received power of the neighboring cell a corresponding to the terminal device is 5 through measurement. At this time, the path loss of the neighboring cell a can be determined to be the transmission power 10-the received power 5, and the path loss of the neighboring cell a is 5 at this time. The path loss of other cells in the neighbor cell list is similar to the path loss obtaining process of the neighbor cell a, and is not described here again.

As an optional manner, after obtaining the corresponding path loss based on the transmission power of the neighboring cells and the received power of the corresponding terminal device, the embodiment of the present application may obtain the theoretical transmission power of the terminal corresponding to each neighboring cell according to the path loss of each neighboring cell. In other words, the embodiment of the present application may obtain the theoretical transmit power of the terminal device for the neighboring cell based on each path loss.

The terminal theoretical transmission power of the terminal equipment for the neighboring cell refers to power required by the terminal equipment for sending data to the neighboring cell. If the maximum transmitting power of the terminal is less than the theoretical transmitting power of the terminal, the maximum transmitting power is less than the theoretical transmitting power of the terminal, which means that the power of the terminal equipment for sending data can only reach the maximum transmitting power. It can be seen that, at this time, the terminal device cannot send the data to be transmitted to the base station. In order to improve the accuracy of cell reselection and ensure the successful establishment of an uplink, the embodiments of the present application may delete the neighboring cell whose theoretical transmission power of the terminal is greater than or equal to the maximum transmission power from the neighboring cell list, thereby implementing the screening of the neighboring cell list to obtain the alternative list.

As an optional manner, in the embodiment of the present application, it may be sequentially determined whether the theoretical transmit power of the terminal corresponding to each neighboring cell is greater than the path loss of the neighboring cell. If the theoretical transmission power of the terminal of a certain neighboring cell is determined to be greater than the maximum transmission power of the terminal, the neighboring cell can be deleted from the neighboring cell list to obtain an alternative list, and then the step S14 is performed.

In step S14, if the theoretical transmit power of the terminal is greater than the maximum transmit power of the terminal, the neighboring cell is deleted from the neighboring cell list to obtain an alternative list.

In the embodiment of the present application, the maximum transmission power of the terminal may be set before the terminal device leaves a factory, and specifically, the maximum transmission power of the terminal may be determined according to a usage scenario of the terminal device. For example, the maximum transmit power of the terminal may be adjusted according to sar (Specific absorption rate) specifications.

As an optional manner, if it is determined that the theoretical transmit power of the terminal is greater than the maximum transmit power of the terminal, the neighbor cell may be deleted from the neighbor cell list to obtain an alternative list, where the alternative list may include at least one alternative cell. In addition, if it is determined that the theoretical transmit power of the terminal is equal to the maximum transmit power of the terminal, the embodiment of the present application may also delete the neighboring cell from the neighboring cell list, so as to update the neighboring cell list.

Optionally, if it is determined that the theoretical transmit power of the terminal is less than the maximum transmit power of the terminal, the neighbor cell may be retained in a neighbor cell list and used as a candidate cell in the embodiment of the present application.

As an example, there are three neighboring cells in the neighboring cell list, where the three neighboring cells are neighboring cell 1, neighboring cell 2, and neighboring cell 3, and the neighboring cell 1 is deleted from the neighboring cell list by determining that the theoretical transmit power of the terminal knowing the neighboring cell 1 is greater than its corresponding maximum transmit power. In addition, the theoretical transmitting power of the terminal of the adjacent cell 2 is determined to be smaller than the corresponding maximum transmitting power, and the theoretical transmitting power of the terminal of the adjacent cell 3 is also determined to be smaller than the corresponding maximum transmitting power, so that the adjacent cell 2 and the adjacent cell 3 are reserved in the adjacent cell list, and the standby list can be obtained. At this time, the candidate cells included in the candidate list are the neighboring cell 2 and the neighboring cell 3, respectively.

In step S15, the control terminal device camps on the candidate cell in the candidate list.

As an optional manner, after the candidate list is obtained, the embodiment of the application may control the terminal device to camp on the candidate cell in the candidate list. Specifically, in the embodiment of the present application, any one candidate cell may be selected from the candidate list for camping.

Optionally, in the embodiment of the present application, the signal quality of each candidate cell may also be analyzed, and the terminal device is camped to the candidate cell with the best signal quality. Optionally, in the embodiment of the present application, the priority of each candidate cell may also be obtained, and the terminal device is camped to the candidate cell with the highest priority. Specifically, which alternative cell the terminal device resides in is not explicitly limited, and may be selected according to actual situations.

According to the method and the device, after the network configuration information is obtained, the neighbor cell list is screened by using the theoretical transmission power of the terminal to obtain the alternative list, so that the accuracy of cell reselection can be improved. Specifically, the network configuration information can be obtained, the network configuration information can include a neighbor cell list, on the basis, system messages of neighbor cells in the neighbor cell list are received, then, the path loss of each neighbor cell is determined based on the transmission power of the neighbor cells in the system messages, the theoretical transmission power of a terminal corresponding to each neighbor cell is obtained according to the path loss of each neighbor cell, if the theoretical transmission power of the terminal is greater than the maximum transmission power of the terminal, the neighbor cells are deleted from the neighbor cell list to obtain an alternative list, and finally, the terminal device is controlled to reside in the alternative cells in the alternative list. Therefore, the terminal equipment can be resided in the cell with smaller path loss, the successful establishment of the uplink can be ensured, and the use experience of the user can be ensured.

Fig. 3 is a flowchart illustrating a cell reselection method according to an exemplary embodiment, where the cell reselection method may be applied to the terminal device in fig. 1, as shown in fig. 3, and includes the following steps.

In step S21, network configuration information is acquired.

In step S22, a system message of each neighboring cell is received.

The above embodiments of steps S21 to S22 have been described in detail, and are not repeated herein.

In step S23, the path loss of each neighboring cell is determined based on the transmission power of the neighboring cell, and the theoretical transmission power of the terminal corresponding to each neighboring cell is obtained according to the path loss of each neighboring cell.

As an optional manner, after determining the path loss of each neighboring cell based on the transmit power of the neighboring cells, the embodiments of the present application may obtain the theoretical transmit power of the terminal corresponding to each neighboring cell according to the path loss of each neighboring cell. Specifically, in the embodiment of the present application, the theoretical transmit power of the terminal corresponding to each neighboring cell is calculated based on the path loss of each neighboring cell, the number of uplink scheduled resource blocks, the received signal strength expected by the network, the path compensation loss factor, and the compensation factor of the coding mode, where a specific calculation formula of the theoretical transmit power of the terminal is as follows.

Among them, txPower _UE Is the theoretical transmission power, num, of the terminal corresponding to the neighboring cell _RB The number of RBs scheduled for uplink, that is, the number of resource blocks scheduled for uplink, can be maintained at about 3 when the VOLTE service is used;

the expected received signal strength of the network can be kept unchanged in the communication process; α is a path compensation loss factor, and the value may also be kept unchanged in the communication process, and in this embodiment of the present application, the value may be 0.7; pathloss _D1 Path loss for each cell; delta _TF The compensation factor of the coding scheme is that the higher the coding scheme is, the larger the compensation is, that is, the closer the coding scheme is to the base station, the larger the compensation is.

In step S24, if the theoretical transmit power of the terminal is greater than the maximum transmit power of the terminal, the neighbor cell is deleted from the neighbor cell list to obtain an alternative list.

Step S24 and step S14 of the above embodiment are already described in detail, and are not repeated here.

In step S25, a target cell meeting the preset condition is selected from the candidate list, and the terminal device is controlled to camp on the target cell.

As an optional manner, when a target cell meeting a preset condition is selected from the candidate list, the terminal device may obtain the received signal strength, the received signal quality, and the uplink signal strength of each candidate cell. On this basis, in the embodiment of the present application, a target reference value of each candidate cell may be determined according to the received signal strength, the received signal quality, and the uplink signal strength, and the candidate cell with the largest target reference value may be taken as the target cell.

In some embodiments, when determining the target reference value of each candidate cell according to the received signal strength, the received signal quality, and the uplink signal strength, the terminal device may perform normalization processing on the received signal strength, the received signal quality, and the uplink signal strength, respectively. On the basis, the received signal strength, the received signal quality and the uplink signal strength after the normalization processing are subjected to weighted summation to obtain a target reference value of each candidate cell.

In this embodiment, the received signal strength and the received signal quality may be downlink signal strength and downlink signal quality of each cell. When normalization processing is performed on the received signal strength, the received signal quality, and the uplink signal strength, the embodiment of the present application may obtain the maximum received signal strength, the maximum received signal quality, and the maximum uplink signal strength of the received signal strength.

On the basis, normalizing the received signal strength according to the maximum received signal strength; normalizing the received signal quality according to the maximum received signal quality; and normalizing the uplink signal strength according to the maximum uplink signal strength.

As an example, if the received Signal strength (Reference Signal Receiving Power, RSRP) of the cell B is 75, and the maximum received Signal strength corresponding to the cell is 97, normalizing the received Signal strength to obtain a value of 75/97; if the received Signal Quality (Reference Signal Receiving Quality, RSRQ) of the cell B is 15 and the maximum received Signal Quality corresponding to the cell is 34, normalizing the received Signal Quality to obtain a value of 15/34; if the uplink signal strength of the cell B is 19 and the maximum uplink signal strength corresponding to the cell is 23, the uplink signal strength is normalized, and the obtained value is 19/23.

As an optional manner, after normalization processing is performed on the received signal strength, the received signal quality, and the uplink signal strength, respectively, in the embodiment of the present application, weighted summation may be performed on the received signal strength, the received signal quality, and the uplink signal strength after normalization processing, so as to obtain a target reference value of each candidate cell.

The weights of the received signal strength, the received signal quality, and the uplink signal strength may be default, or may be weights corresponding to each cell, that is, weights of the received signal strength, the received signal quality, and the uplink signal strength corresponding to different cells are different. In addition, the weights of the received signal strength, the received signal quality and the uplink signal strength can also be dynamically adjusted according to the actual situation of the cell. For example, if the signal strength at cell a is weaker at a first time, the corresponding weight may be smaller, and if the signal strength at cell a is stronger at a second time, the corresponding weight may be larger.

As a specific embodiment, the formula for performing weighted summation on the normalized received signal strength, received signal quality, and uplink signal strength may be: normalized received signal strength 40% + normalized received signal quality 30% + normalized theoretical uplink signal strength 30%.

As in the above example, the normalized received signal strength, received signal quality, and uplink signal strength of cell a are summed in a weighted manner, and the target reference value of each candidate cell may be 75/97 × 0.4+15/34 × 0.3+ (-19/23) = 0.3=0.19. At this time, the target reference value corresponding to the cell a is 0.19.

As an example, the candidate list includes a candidate cell 1, a candidate cell 2, and a candidate cell 3, and the target reference value 1, the target reference value 2, and the target reference value 3 corresponding to the candidate cell 1, the candidate cell 2, and the candidate cell 3 are obtained through calculation, and it is known through comparison that the target reference value 3 is the largest, so the candidate cell 3 may be used as the target cell. At this time, the terminal device can be controlled to camp on the alternative cell 3.

As another optional way, when a target cell meeting a preset condition is selected from the candidate list, the embodiment of the present application may also obtain at least one of the signal strength and the cell priority of each candidate cell. On the basis, a target cell is selected from the candidate list according to at least one of the signal strength and the cell priority.

As a specific implementation manner, when a target cell meeting a preset condition is selected from the candidate list, the embodiment of the present application may select the candidate cell with the largest signal strength from the candidate list, and use the candidate cell with the largest signal strength as the target cell.

As another specific implementation manner, when a target cell meeting a preset condition is selected from the candidate list, the embodiment of the present application may select a candidate cell with the highest priority from the candidate list, and use the candidate cell with the highest priority as the target cell.

As another specific implementation manner, when a target cell meeting a preset condition is selected from the candidate list, if the candidate cell with the highest priority and the candidate cell with the highest signal strength are not the same cell, the embodiment of the present application may use the candidate cell with the highest priority as the target cell. How to select a target cell meeting the preset condition from the candidate list is not described in detail in the embodiment of the present application, and the selection may be performed according to an actual situation.

According to the embodiment of the application, the neighboring cells meeting the uplink power requirement enter the alternative list through screening, so that the accuracy of cell reselection is ensured, namely, the terminal equipment is prevented from residing in the cell with larger edge path loss, and thus the network experience of a user under a specific condition can be improved. For example, in a location where the downlink signal strength is equivalent, a cell with smaller path loss may be selected in the embodiment of the present application, so that better uplink experience may be obtained.

After the network configuration information is obtained, the neighbor cell list is screened by using the theoretical transmitting power of the terminal to obtain the alternative list, so that the accuracy of cell reselection can be improved. Specifically, the network configuration information may be obtained, where the network configuration information may include a neighbor cell list, on this basis, a system message of each neighbor cell in the neighbor cell list is received, then a path loss of each neighbor cell is determined based on a transmit power of the neighbor cell in the system message, a theoretical transmit power of a terminal corresponding to each neighbor cell is obtained according to the path loss of each neighbor cell, and if the theoretical transmit power of the terminal is greater than a maximum transmit power of the terminal, the neighbor cell is deleted from the neighbor cell list to obtain an alternative list, and finally, the terminal device is controlled to reside in an alternative cell in the alternative list. Therefore, the terminal equipment can be resided in the cell with smaller path loss, the successful establishment of the uplink can be ensured, and the use experience of the user can be ensured. In addition, the target cell is selected from the candidate cells by using the target parameter value, so that the cell reselection can be more accurately realized.

Fig. 4 is a block diagram illustrating a cell reselection apparatus 300 according to an exemplary embodiment, where the cell reselection apparatus 300 may be applied in a terminal device. Referring to fig. 4, the cell reselection apparatus 300 may include an information acquisition module 301, a receiving module 302, a determining module 303, an alternative list acquisition module 304, and a control module 305.

The information obtaining module 301 is configured to obtain network configuration information, where the network configuration information includes a neighbor cell list, and the neighbor cell list includes a plurality of neighbor cells;

the receiving module 302 is configured to receive a system message of each of the neighboring cells, where the system message includes the transmission power of the neighboring cell;

the determining module 303 is configured to determine a path loss of each neighboring cell based on the transmission power of the neighboring cell, and obtain a theoretical terminal transmission power corresponding to each neighboring cell according to the path loss of each neighboring cell;

the candidate list obtaining module 304 is configured to delete the neighboring cell from the neighboring cell list to obtain a candidate list if the theoretical transmit power of the terminal is greater than the maximum transmit power of the terminal, where the candidate list includes at least one candidate cell;

the control module 305 is configured to control the camping of the terminal device to the candidate cell in the candidate list.

In some embodiments, the determining module 303 may be configured to determine the path loss of each of the neighboring cells based on the transmit power of each of the neighboring cells and the receive power of the corresponding terminal device.

In some embodiments, the control module 305 may be configured to select a target cell meeting a preset condition from the candidate list, and control the terminal device to camp on the target cell.

In some embodiments, the control module 305 may include:

a parameter obtaining submodule configured to obtain the received signal strength, the received signal quality and the uplink signal strength of each of the candidate cells;

a reference value determining submodule configured to determine a target reference value of each candidate cell according to the received signal strength, the received signal quality, and the uplink signal strength, and take the candidate cell with the largest target reference value as the target cell.

In some embodiments, the reference value determination submodule is configured to normalize the received signal strength, the received signal quality, and the uplink signal strength respectively; and performing weighted summation on the normalized received signal strength, the normalized received signal quality and the normalized uplink signal strength to obtain the target reference value of each candidate cell.

In some embodiments, the control module 305 may be further configured to obtain at least one of a signal strength and a cell priority of each of the alternative cells; selecting the target cell from the candidate list according to at least one of the signal strength and cell priority.

In some embodiments, the determining module 303 may be further configured to calculate a theoretical transmit power of the terminal corresponding to each of the neighboring cells based on the path loss of each of the neighboring cells, the number of uplink scheduled resource blocks, the received signal strength expected by the network, a path compensation loss factor, and a compensation factor of a coding scheme.

With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.

The present disclosure also provides a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the cell reselection method provided by the present disclosure.

Fig. 5 is a block diagram illustrating an apparatus 800 for cell reselection, in accordance with an example embodiment. For example, the apparatus 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 5, the apparatus 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 806 provide power to the various components of device 800. The power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus 800.

The multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The input/output interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed state of the device 800, the relative positioning of components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration/deceleration of the device 800, and a change in temperature of the device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described cell reselection methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the apparatus 800 to perform the cell reselection method described above is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

The apparatus may be a part of a terminal device, besides a stand-alone terminal device, for example, in an embodiment, the apparatus may be an Integrated Circuit (IC) or a chip, where the IC may be one IC or a set of multiple ICs; the chip may include, but is not limited to, the following categories: a GPU (Graphics Processing Unit), a CPU (Central Processing Unit), an FPGA (Field Programmable Gate Array), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an SOC (System on Chip, SOC, system on Chip, or System on Chip), and the like. The integrated circuit or chip described above may be configured to execute executable instructions (or code) to implement the cell reselection method described above. Where the executable instructions may be stored in the integrated circuit or chip or may be retrieved from another device or apparatus, for example, where the integrated circuit or chip includes a processor, a memory, and an interface for communicating with other devices. The executable instructions may be stored in the memory, and when executed by the processor, implement the cell reselection method described above; alternatively, the integrated circuit or chip may receive executable instructions through the interface and transmit the executable instructions to the processor for execution, so as to implement the cell reselection method described above.

In another exemplary embodiment, a computer program product is also provided, which comprises a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-mentioned cell reselection method when executed by the programmable apparatus.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A cell reselection method is applied to a terminal device, and comprises the following steps:

determining the path loss of each neighboring cell based on the transmitting power of the neighboring cells, and acquiring the theoretical transmitting power of the terminal corresponding to each neighboring cell according to the path loss of each neighboring cell;

2. The cell reselection method of claim 1, wherein the determining the path loss of each of the neighboring cells based on the transmission power of the neighboring cells comprises:

3. The cell reselection method of claim 1, wherein the controlling the terminal device to camp on the candidate cells in the candidate list comprises:

and selecting a target cell meeting preset conditions from the candidate list, and controlling the terminal equipment to reside in the target cell.

4. The cell reselection method according to claim 3, wherein the selecting a target cell meeting a preset condition from the candidate list comprises:

5. The cell reselection method of claim 4, wherein said determining the target reference value of each of the candidate cells according to the received signal strength, the received signal quality, and the uplink signal strength comprises:

and performing weighted summation on the normalized received signal strength, the normalized received signal quality and the normalized uplink signal strength to obtain the target reference value of each candidate cell.

6. The cell reselection method according to claim 3, wherein the selecting a target cell meeting a preset condition from the candidate list comprises:

selecting the target cell from the candidate list according to at least one of the signal strength and cell priority.

7. The cell reselection method according to any one of claims 1 to 6, wherein the obtaining the theoretical transmit power of the terminal corresponding to each of the neighboring cells according to the path loss of each of the neighboring cells includes:

8. A cell reselection apparatus, applied to a terminal device, the apparatus comprising:

a receiving module configured to receive a system message of each of the neighboring cells, where the system message includes a transmit power of the neighboring cell;

the determining module is configured to determine the path loss of each neighboring cell based on the transmitting power of the neighboring cell, and acquire the theoretical transmitting power of the terminal corresponding to each neighboring cell according to the path loss of each neighboring cell;

a candidate list obtaining module configured to delete the neighboring cell from the neighboring cell list to obtain a candidate list if the theoretical transmit power of the terminal is greater than the maximum transmit power of the terminal, where the candidate list includes at least one candidate cell;

a control module configured to control the terminal device to camp on the candidate cell in the candidate list.

9. A terminal device, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to:

10. A computer-readable storage medium, on which computer program instructions are stored, which program instructions, when executed by a processor, carry out the steps of the method according to any one of claims 1 to 7.