CN114651479B - Methods, devices, communication equipment and storage media for accessing cells - Google Patents

Abstract

Embodiments of the present disclosure provide a method for accessing a cell, wherein the method is applied to a terminal and includes: in response to the terminal being located in an occlusion area of the cell, adjusting parameters for the terminal to select the access cell; wherein, the terminal selects the access cell parameters, including: cell selection and reselection parameters, and/or cell handover parameters.

Description

Methods, devices, communication equipment and storage media for accessing cells

Technical field

The present disclosure relates to the field of wireless communication technology but is not limited to the field of wireless communication technology, and in particular, to a method, device, communication equipment and storage medium for accessing a cell.

Background technique

In the fifth generation mobile communication technology (5G) New Radio (NR, New Radio), terminals can perform cell selection and reselection based on the S criterion and the R criterion. In New Radio (NR) version 16 (R16, Release), a conditional handover (CHO) mechanism is introduced, and the terminal can perform cell switching based on conditional handover (CHO).

In complex wireless communication scenarios, tall obstructions on the ground (such as mountains, tall buildings, etc.) will block the signals sent by the base station to some areas on the ground, which will affect the terminal's cell selection and reselection, as well as conditional handover (CHO). affect.

Contents of the invention

The embodiments of the present disclosure disclose a method, device, communication equipment and storage medium for accessing a cell.

According to a first aspect of an embodiment of the present disclosure, a method for accessing a cell is provided, wherein, applied to a terminal, the method includes:

In response to the terminal being located in the blocking area of the cell, adjusting the parameters for the terminal to select the access cell; wherein the parameters for the terminal to select the access cell include: parameters for cell selection and reselection, and/or parameters for cell switching. .

In one embodiment, in response to the terminal being located in the blocking area of the cell, adjusting the parameters of the cell selected by the terminal to access the cell includes:

In response to the terminal being located in the blocking area of the serving cell, adjusting the parameter selection of the access cell selected by the terminal to the parameter value of the adjacent cell;

and / or,

In response to the terminal being located in the blocking area of the adjacent cell, adjusting the parameter selection of the access cell selected by the terminal to the parameter value of the neighboring cell corresponding to the blocking area.

In one embodiment, the access cell is a non-terrestrial network (NTN) cell.

In one embodiment, adjusting the parameters for the terminal to select an access cell includes:

In response to the terminal being in a Radio Resource Control (RRC) idle state, the parameters of the cell selection and reselection are adjusted.

In one embodiment, the parameters of cell selection and reselection include at least one of the following:

The duration for which the reselection criteria are met;

Cell selection reception value S _relex ;

Cell selection quality value S _qual ;

R value of R criterion;

The reference distance between the terminal and adjacent cells;

The reference distance between the terminal and the satellite corresponding to the adjacent cell;

The reference distance between the terminal and the serving cell;

The reference distance between the terminal and the satellite corresponding to the serving cell.

In one embodiment, adjusting the parameters for the terminal to select an access cell includes:

In response to the terminal being in a radio resource control (RRC) connected state, the parameters of the cell handover are adjusted.

In one embodiment, the cell handover parameters include:

Parameters based on conditional switching (CHO).

In one embodiment, the parameters based on conditional handover (CHO) include at least one of the following:

Reference signal received power (RSRP);

Reference signal reception quality (RSRQ);

The reference distance between the terminal and adjacent cells;

The reference distance between the terminal and the satellite corresponding to the adjacent cell;

The reference distance between the terminal and the serving cell;

The reference distance between the terminal and the satellite corresponding to the serving cell;

Waiting time before switching to adjacent cell;

The time point of switching to the adjacent cell;

Timing advance (TA) value;

The elevation angle of the terminal relative to the satellite;

The triggering time (TTT) of conditional switching (CHO).

In one embodiment, the method further includes:

Send a measurement report to the network device; wherein the measurement report carries indication information, the indication information indicates that the terminal is located in the blocking area of the cell, and is used for the network device to determine the location to which the terminal switches. community.

In one embodiment, the method further includes:

Obtain information about obstructions;

According to the information of the obstruction, it is determined whether the terminal is located in the obstruction area of the cell.

In one embodiment, the information of the obstruction includes at least one of the following: location information of the obstruction, altitude information of the obstruction, and shape information of the obstruction.

In one embodiment, obtaining information about obstructions includes:

Determine the information of the obstruction based on pre-stored three-dimensional map information;

or,

Receive information about the obstruction broadcast by the network device.

In one embodiment, the method further includes:

In response to the distance between the terminal and the obstruction being within a distance threshold range, it is determined whether the terminal is located in the obstruction area of the cell; wherein the distance threshold is determined based on the information of the obstruction.

In one embodiment, adjusting the parameters for the terminal to select an access cell includes:

The parameter value of the parameter for the terminal to select an access cell is increased or decreased by an offset.

In one embodiment, an offset configuration message sent by a network device is received; wherein the offset configuration message carries the offset.

In one embodiment, the method further includes:

The offset is determined based on the location information of the terminal, the location information of the satellite, and the information of the obstruction.

In one embodiment, determining the offset based on the location of the terminal, satellite position information, and obstruction information includes:

The offset is determined based on the mapping relationship between the terminal location information, the satellite location information, the obstruction information, and the offset.

In one embodiment, the method further includes:

Receive a configuration message carrying the mapping relationship sent by the network device.

In one embodiment, the method further includes:

Obtain the ephemeris information of the satellite;

The position information of the satellite is determined based on the ephemeris information.

In one embodiment, obtaining the ephemeris information of the satellite includes:

Receive the ephemeris information broadcast by the network device;

or,

The ephemeris information is determined based on the identity identification (ID) and preconfiguration information of the satellite; wherein the identity identification (ID) is sent by a network device; the preconfiguration information includes the satellite information of at least one satellite. calendar information.

According to a second aspect of an embodiment of the present disclosure, a device for accessing a cell is provided, which is applied in a terminal, and the device includes an adjustment module, wherein,

The adjustment module is configured to: in response to the terminal being located in the blocking area of the cell, adjust the parameters for the terminal to select to access the cell; wherein the parameters for the terminal to select to access the cell include: cell selection and reselection. parameters, and/or cell handover parameters.

In one embodiment, the adjustment module is further configured to:

In response to the terminal being located in the blocking area of the serving cell, adjusting the parameter selection of the access cell selected by the terminal to the parameter value of the adjacent cell;

and / or,

In response to the terminal being located in the blocking area of the adjacent cell, adjusting the parameter selection of the access cell selected by the terminal to the parameter value of the neighboring cell corresponding to the blocking area.

According to a third aspect of an embodiment of the present disclosure, a communication device is provided, and the communication device includes:

processor;

memory for storing instructions executable by the processor;

Wherein, the processor is configured to implement the method described in any embodiment of the present disclosure when running the executable instructions.

According to a fourth aspect of an embodiment of the present disclosure, a computer storage medium is provided. The computer storage medium stores a computer executable program. When the executable program is executed by a processor, the method described in any embodiment of the present disclosure is implemented.

In the embodiment of the present disclosure, in response to the terminal being located in the blocking area of the cell, the parameters for the terminal to select to access the cell are adjusted; wherein the parameters for the terminal to select to access the cell include: parameters for cell selection and reselection, and /or cell handover parameters. In this way, when the terminal performs cell selection and reselection, and/or cell handover, if the terminal is located in the occlusion area of the cell, the parameters of cell selection and reselection, and/or the parameters of cell handover will be adjusted in time. Compared with using the same cell selection and reselection parameters, and/or cell handover parameters in any area of the cell, the cell selection and reselection parameters, and/or cell handover parameters can be better adapted. The wireless communication environment of the area where the terminal is located can reliably realize cell selection and reselection, and/or cell switching.

Description of the drawings

Figure 1 is a schematic structural diagram of a wireless communication system.

Figure 2 is a schematic diagram of a wireless communication scenario according to an exemplary embodiment.

Figure 3 is a schematic diagram of a wireless communication scenario according to an exemplary embodiment.

Figure 4 is a schematic flowchart of a method of accessing a cell according to an exemplary embodiment.

FIG. 5 is a schematic diagram of an occlusion area according to an exemplary embodiment.

Figure 6 is a flowchart of a method of accessing a cell according to an exemplary embodiment.

Figure 7 is a flow chart of a method of accessing a cell according to an exemplary embodiment.

Figure 8 is a flowchart of a method of accessing a cell according to an exemplary embodiment.

Figure 9 is a flowchart of a method for accessing a cell according to an exemplary embodiment.

Figure 10 is a flow chart of a method of accessing a cell according to an exemplary embodiment.

Figure 11 is a flow chart of a method of accessing a cell according to an exemplary embodiment.

Figure 12 is a flow chart of a method of accessing a cell according to an exemplary embodiment.

Figure 13 is a schematic diagram of a device for accessing a cell according to an exemplary embodiment.

Figure 14 is a block diagram of a base station according to an exemplary embodiment.

Detailed ways

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

The terminology used in the embodiments of the present disclosure is for the purpose of describing specific embodiments only and is not intended to limit the embodiments of the present disclosure. As used in the embodiments of the present disclosure and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be called second information, and similarly, the second information may also be called first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "when" or "in response to determining."

For the purpose of simplicity and ease of understanding, this article uses the terms "greater than" or "less than" when characterizing the size relationship. However, those skilled in the art can understand that the term “greater than” also encompasses the meaning of “greater than or equal to”, and “less than” also encompasses the meaning of “less than or equal to”.

Please refer to FIG. 1 , which shows a schematic structural diagram of a wireless communication system provided by an embodiment of the present disclosure. As shown in Figure 1, the wireless communication system is a communication system based on cellular mobile communication technology. The wireless communication system may include several user equipments 110 and several base stations 120.

Where user equipment 110 may be a device that provides voice and/or data connectivity to a user. The user equipment 110 may communicate with one or more core networks via a Radio Access Network (RAN). The user equipment 110 may be an Internet of Things user equipment, such as a sensor device, a mobile phone (or a “cellular” phone). ) and computers with IoT user equipment, which may be, for example, fixed, portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted devices. For example, station (STA), subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), remote station (remote station), access point, remote user equipment ( remote terminal), access terminal, user terminal, user agent, user device, or user equipment. Alternatively, the user equipment 110 may also be equipment of an unmanned aerial vehicle. Alternatively, the user equipment 110 may also be a vehicle-mounted device, for example, it may be an on-board computer with a wireless communication function, or a wireless user equipment connected to an external on-board computer. Alternatively, the user equipment 110 may also be a roadside device, for example, it may be a streetlight, a signal light or other roadside device with a wireless communication function.

The base station 120 may be a network-side device in a wireless communication system. Wherein, the wireless communication system may be the 4th generation mobile communication technology (the 4th generation mobile communication, 4G) system, also known as the Long Term Evolution (LTE) system; or the wireless communication system may also be a 5G system, Also called new air interface system or 5G NR system. Alternatively, the wireless communication system may also be a next-generation system of the 5G system. Among them, the access network in the 5G system can be called NG-RAN (New Generation-Radio Access Network).

The base station 120 may be an evolved base station (eNB) used in the 4G system. Alternatively, the base station 120 may also be a base station (gNB) that adopts a centralized distributed architecture in the 5G system. When the base station 120 adopts a centralized distributed architecture, it usually includes a centralized unit (central unit, CU) and at least two distributed units (distributed unit, DU). The centralized unit is provided with a protocol stack including a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control protocol (Radio Link Control, RLC) layer, and a Media Access Control (Media Access Control, MAC) layer; distributed The unit is provided with a physical (Physical, PHY) layer protocol stack, and the embodiment of the present disclosure does not limit the specific implementation of the base station 120.

A wireless connection may be established between the base station 120 and the user equipment 110 through a wireless air interface. In different implementations, the wireless air interface is a wireless air interface based on the fourth generation mobile communication network technology (4G) standard; or the wireless air interface is a wireless air interface based on the fifth generation mobile communication network technology (5G) standard, such as The wireless air interface is a new air interface; alternatively, the wireless air interface may also be a wireless air interface based on the next generation mobile communication network technology standard of 5G.

In some embodiments, an E2E (End to End, end-to-end) connection can also be established between the user equipments 110 . For example, V2V (vehicle to vehicle, vehicle to vehicle) communication, V2I (vehicle to Infrastructure, vehicle to roadside equipment) communication and V2P (vehicle topedestrian, vehicle to person) communication in vehicle networking communication (vehicle to everything, V2X), etc. Scenes.

Here, the above user equipment can be considered as the terminal equipment of the following embodiments.

In some embodiments, the above-mentioned wireless communication system may also include a network management device 130.

Several base stations 120 are connected to the network management device 130 respectively. The network management device 130 may be a core network device in a wireless communication system. For example, the network management device 130 may be a mobility management entity (Mobility Management Entity) in an evolved packet core network (Evolved Packet Core, EPC). MME). Alternatively, the network management device can also be other core network devices, such as Serving GateWay (SGW), Public Data Network GateWay (PGW), Policy and Charging Rules functional unit (Policy and Charging Rules) Function, PCRF) or Home Subscriber Server (HomeSubscriber Server, HSS), etc. The embodiment of the present disclosure does not limit the implementation form of the network management device 130.

In order to better understand the technical solution described in any embodiment of the present disclosure, first, a wireless communication scenario is described through an embodiment.

In the fifth generation mobile communication technology (5G) system, non-terrestrial networks (NTN, Non-terrestrial Networks) are introduced. Please refer to Figure 2 and Figure 3, which are schematic diagrams of the near-far effect on the received signal strength of terminals in different scenarios. Among them, Figure 2 is a schematic diagram of the received signal strength of a terminal in a terrestrial network (TN, Terrestrial Network) wireless communication scenario. The terrestrial network (TN) includes terrestrial network base stations and terminals. Figure 3 is a schematic diagram of the received signal strength of a terminal in a non-terrestrial network (NTN) wireless communication scenario. The non-terrestrial network (NTN) includes non-terrestrial network base stations and terminals.

In a terrestrial network (TN) system, the terminal can determine whether the terminal is in a terrestrial network based on the obvious difference in the reference signal receiving power (RSRP, Reference Signal Receiving Power) or the reference signal receiving quality (RSRQ, ReferenceSignal Receiving Quality) between the cell center and the cell edge. The edge of the neighborhood. However, in non-terrestrial networks (NTN), the cell radius is large, the terminal is at the center or edge of the cell, the difference between the terminal's reference signal received power (RSRP) and reference signal received quality (RSRQ) is small, the near-far effect is not obvious, and the cell A large radius results in a large overlapping area of cells, which is prone to "ping-pong" switching. Here, "ping-pong" switching means switching back and forth between different cells.

In the fifth generation mobile communication technology (5G) New Radio (NR), the terminal performs cell selection or reselection based on the S criterion and the R criterion.

Among them, the S criterion is:

Srxlev>0 and Squal>0;

Among them, Srxlev is the cell selection reception value; Squal is the cell selection quality value. The terminal needs to satisfy the S criterion for cell selection or reselection.

Among them, the R criterion is:

Rs=Qmeas.s+Qhyst-Qoffset _temp ;

Rn=Qmeas.n-Qoffset-Qoffset _temp ;

Among them, Rs is the R value of the serving cell; Rn is the R value of the adjacent cell; Qmeas.s is the reference signal received power (RSRP) measurement value of the serving cell; Qmeas.n is the reference signal received power (RSRP) of the adjacent cell. ) measured value; Qhyst is the cell reselection hysteresis value; Qoffset _temp is the temporary offset value; Qoffset is the offset value. The specific parameters are described in Table 1:

Table I

For non-terrestrial networks (NTN), the near-far effect is not obvious. Cell reselection based only on Reference Signal Received Power (RSRP) and/or Reference Signal Received Quality (RSRQ) may cause the terminal to reselect back and forth between the two cells, which is unreliable. Location information and ephemeris information can be used As auxiliary information for cell reselection.

In New Radio (NR) version 16 (R16), the conditional handover (CHO) mechanism is introduced to improve the robustness of handover. When one or more conditional handover (CHO) triggering conditions are met, the terminal performs conditional handover (CHO). The terminal starts evaluating the trigger condition after receiving the conditional handover (CHO) configuration and stops evaluating the trigger condition after performing the handover. According to the characteristics of non-terrestrial networks (NTN), applying the conditional handover (CHO) mechanism to non-terrestrial networks (NTN) can effectively reduce the probability of handover failure and improve the robustness of non-terrestrial network (NTN) systems. Since the conditional handover (CHO) in version 16 (R16) is triggered based on measurement events (such as A3 and A5, etc.), but the near-far effect is not obvious in non-terrestrial networks (NTN), it may be difficult for the terminal to distinguish better signals based on this. community.

In order to reduce "ping-pong" handovers between cells, in addition to triggering handovers based on measurement results, auxiliary information such as the terminal's location information and/or satellite ephemeris information can also be used to perform handovers. Therefore, TR38.821 proposes 5 optional conditional handover (CHO) triggering methods suitable for non-terrestrial networks (NTN), namely: measurement-based triggering, location-based triggering, time/timer-based triggering, Triggering based on timing advance (TA, Timing advance) value and triggering based on the elevation angle between the serving cell and the target cell. Measurement events supported in the New Radio (NR) system include: A1, A2, A3, A4, A5, A6, B1 and B2.

Although the above technical solution can adapt to some characteristics of non-terrestrial networks (NTN), it does not consider that when the satellite signal is affected by obstructions, since the signal sent by the base station is blocked by obstructions, cell selection and reselection, and cell switching are not considered. problems faced. Here, cell selection and reselection include at least one of cell selection performed by the terminal when starting and cell reselection performed after starting.

As shown in Figure 4, this embodiment provides a method for accessing a cell. When applied to a terminal, the method includes:

Step 41: In response to the terminal being located in the shielding area of the cell, adjust the parameters for the terminal to select the access cell; wherein, the parameters for the terminal to select the access cell include: parameters for cell selection and reselection, and/or parameters for cell switching.

Here, the terminal may be, but is not limited to, a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, RoadSide Unit), a smart home terminal, an industrial sensing device and/or a medical device, etc.

Here, the cell where the terminal is located may be a terrestrial network (TN) and/or a non-terrestrial network (NTN) cell.

In one embodiment, the cell selected and reselected by the terminal, and/or the cell to which the terminal is handed over may be a cell of a terrestrial network (TN).

In one embodiment, the cell selected and reselected by the terminal, and/or the cell to which the terminal is handed over may be a non-terrestrial network (NTN) cell.

Here, the parameters of cell selection and reselection are parameters used by the terminal when performing cell selection or cell reselection. For example, the duration that satisfies the reselection criterion, the cell selection reception value S _relex , the cell selection quality value S _qual and the R value of the R criterion, etc.

Here, the cell switching parameters are parameters used by the terminal when performing cell switching. For example, reference signal received power (RSRP), reference signal received quality (RSRQ), reference distance between the terminal and the adjacent cell, and reference distance between the terminal and the satellite corresponding to the adjacent cell.

In one embodiment, the obstruction area may be an area where signals sent by the base station are blocked by obstructions. Here, the base station may be a base station in the air or a base station on the ground. It should be noted that the base station in any embodiment of the present disclosure can also be replaced by a network device. Here, the network device may be a device with part or all base station functions.

Please refer to Figure 5, taking a non-terrestrial network (NTN) as an example. Here, the base station can be a base station on the ground, and the satellite forwards the signal of this base station to the terminal. After the signal forwarded by the satellite is blocked by obstructions, an obstruction area will be formed on the ground. In Figure 5, the second terminal is located in the occlusion area, and the first terminal and the third terminal are not located in the occlusion area.

In one embodiment, the base station may be a base station in a non-terrestrial network (NTN) or a base station in a terrestrial network (TN).

In one embodiment, the same base station can belong to both a non-terrestrial network (NTN) and a terrestrial network (TN).

In one embodiment, the base station of the non-terrestrial network (NTN) may be installed on a satellite or on the ground.

In one embodiment, the base station can send the signal to the satellite through the ground station, and the satellite forwards the signal to the terminal after receiving the signal. It should be noted that satellites play the role of relaying signals during signal transmission.

In one embodiment, the terminal can obtain distance information d between the terminal and the obstruction. When the value of d is less than the set distance threshold D, the terminal starts to determine whether the terminal is located in the occlusion area. For example, when the terminal is approaching an obstruction, it will continuously detect the distance between the terminal and the obstruction. When the distance between the terminal and the obstruction is less than the set distance threshold, it will start to determine whether the terminal is located in the obstruction area. process.

In one embodiment, the distance threshold D may be determined based on information about the obstruction. Here, the information about the obstruction may be the position information of the obstruction, the altitude information of the obstruction, and/or the shape information of the obstruction, etc. For example, when the altitude of the obstruction is greater than the altitude threshold, the distance threshold can be set to be greater than A. In this way, the setting of the distance threshold can be flexibly adapted to the information of the occlusion object. Here, the shape information of the occluder can be information such as height, width, and outline.

In one embodiment, the distance threshold D may be configured by the network for the terminal.

In one embodiment, the base station sends a radio resource control (RRC) message carrying the distance threshold D to the terminal.

In one embodiment, if the distance between the terminal and the blocking object is less than the distance threshold D, it can be determined that the terminal is located in the blocking area. If the distance between the terminal and the blocking object is greater than the distance threshold D, it can be determined that the terminal is not located in the blocking area.

In one embodiment, if the distance between the terminal and the obstruction is less than the distance threshold A, it is determined that the terminal is located in the obstruction area. If the distance between the terminal and the obstruction is greater than the distance threshold A, it is determined that the terminal is not located in the obstruction area. Here, the distance threshold A is determined based on the position of the satellite and the information about the obstruction. Here, the information of the obstruction may be the location information of the obstruction, the altitude information of the obstruction, and/or the shape information of the obstruction. Here, the distance threshold A is smaller than the distance threshold D.

In one embodiment, when the information of the obstruction is the same and the satellite's operating altitude is greater than the altitude threshold, the distance threshold can be set to be greater than the distance E. In one embodiment, the distance threshold may be a threshold that triggers the terminal to turn on the detection method to determine whether the terminal is located in the blocking area. For example, when the distance between the terminal and the obstruction is less than the distance threshold, the terminal is triggered to turn on the detection method to determine whether the terminal is located in the blocking area. . In one embodiment, after the terminal is turned on, the detection to determine whether the terminal is located in the obstruction area is always enabled. When the distance between the terminal and the obstruction is less than the distance threshold, it is determined that the terminal is in the obstruction area. In one embodiment, when the satellite is at different positions, the area of the obstruction area corresponding to the obstruction is different. The position height of the satellite is less than the height threshold, and the area of the obstruction area corresponding to the obstruction is greater than the area threshold. The position height of the satellite is greater than the height threshold, and the area of the obstruction area corresponding to the obstruction is less than the area threshold. In this way, the terminal can determine the obstruction area based on the satellite's position and obstruction information.

In one embodiment, the position of the satellite may be determined by the terminal based on ephemeris information sent by the satellite. For example, the satellite may send ephemeris information to the terminal periodically or based on event triggers.

In one embodiment, adjusting the parameters for the terminal to select the access cell may be to increase or decrease the parameter value of the parameter for the terminal to select the access cell.

In one embodiment, when the parameter is a parameter for cell selection and reselection, the parameters for cell selection and reselection include at least one of the following:

The duration for which the reselection criteria are met;

Cell selection reception value S _relex ;

Cell selection quality value S _qual ;

R value of R criterion;

The reference distance between the terminal and adjacent cells;

The reference distance between the terminal and the satellite corresponding to the adjacent cell;

The reference distance between the terminal and the serving cell;

The reference distance between the terminal and the satellite corresponding to the serving cell.

Here, the parameters for cell selection and reselection are parameters for the terminal to perform cell selection and reselection. Wherein, the parameters for cell selection and reselection include at least one of the parameters for cell selection and the parameters for cell reselection.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to increase or decrease the parameter value of the cell selection and reselection parameters. Here, using the adjusted parameter values of cell selection and reselection parameters for cell selection and reselection can reduce the terminal cost compared to using the parameter values of cell selection and reselection parameters before adjustment for cell selection and reselection. The probability of selecting the cell corresponding to the occlusion area can reduce the probability that the terminal reselects the adjacent cell corresponding to the occlusion area of the adjacent cell or can increase the probability that the terminal in the occlusion area of the serving cell reselects to another cell. Here, other cells may be neighboring cells. Here, the blocking area of the serving cell is the area where the signal of the serving cell is blocked. The blocking area of the adjacent cell is the area where the signal of the adjacent cell is blocked.

Here, reducing the probability that the terminal selects the cell corresponding to the occlusion area may increase the difficulty for the terminal to select this cell.

Here, reducing the probability that the terminal reselects the adjacent cell corresponding to the occlusion area of the adjacent cell may be to increase the difficulty of the terminal reselecting the adjacent cell.

Here, increasing the probability that a terminal that is in the blocking area of the serving cell reselects to other cells can reduce the difficulty of reselecting the terminal to other cells.

Here, the duration that satisfies the reselection criterion can be that when the terminal performs cell reselection, after satisfying the reselection criterion, it needs to pass the duration corresponding to the duration that satisfies the reselection criterion before it can reselect and meet the reselection criteria. Conditional neighborhood.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to increase the duration that satisfies the reselection criteria. Here, when the duration for satisfying the reselection criterion is increased, it will increase the difficulty for the terminal to reselect a cell.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to reduce the duration for satisfying the reselection criterion. Here, when the duration for satisfying the reselection criterion is reduced, the difficulty for the terminal to reselect a cell will be reduced.

In one embodiment, in response to the terminal being located in the blocking area of the serving cell, the duration for satisfying the reselection criteria can be reduced, the difficulty of the terminal reselecting the cell can be reduced, and rapid reselection can be achieved. In this way, it is easier for the terminal to reselect a cell with more stable communication quality.

In one embodiment, in response to the terminal being located in an occluded area of a neighboring cell, the duration for satisfying the criteria for reselection to the neighboring cell may be increased and the difficulty of reselecting the terminal to the neighboring cell may be increased. In this way, the situation of the terminal reselecting to a neighboring cell with unstable wireless communication quality can be effectively reduced, making the wireless communication quality of the reselected neighboring cell more stable. It should be noted that in this disclosure, adjacent cells may also be called adjacent cells.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to increase the cell selection reception value S _relex . Here, when the cell selection reception value S _relex is increased, the difficulty for the terminal to select and reselect this cell will be reduced.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to reduce the cell selection reception value S _relex . Here, when the cell selection reception value S _relex is reduced, it will increase the difficulty for the terminal to select and reselect this cell.

In one embodiment, in response to the terminal being located in the blocking area of the serving cell, the cell selection reception value S _relex of the adjacent cell can be increased to reduce the difficulty of the terminal reselecting to the adjacent cell and achieve fast reselection. In this way, it is easier for the terminal to reselect a neighboring cell with more stable communication quality.

In one embodiment, in response to the terminal being located in an occlusion area of a neighboring cell, the neighboring cell selection reception value S _relex may be reduced to increase the difficulty for the terminal to reselect to the neighboring cell. In this way, the situation where the terminal is reselected to a cell with unstable wireless communication quality can be effectively reduced, making the wireless communication quality of the reselected cell more stable.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to increase the cell selection quality value S _qual . Here, when the cell selection quality value S _qual is increased, the difficulty for the terminal to select and reselect this cell will be reduced.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to reduce the cell selection quality value S _qual . Here, when the cell selection quality value S _qual is reduced, it will increase the difficulty for the terminal to select and reselect this cell.

In one embodiment, in response to the terminal being located in the blocking area of the serving cell, the cell selection quality value S _qual of the adjacent cell can be increased to reduce the difficulty of the terminal reselecting to the adjacent cell and achieve fast reselection. In this way, it is easier for the terminal to reselect a neighboring cell with more stable communication quality.

In one embodiment, in response to the terminal being located in an occlusion area of a neighboring cell, the cell selection quality value S _qual of the neighboring cell may be reduced to increase the difficulty for the terminal to reselect to the neighboring cell. In this way, the situation where the terminal is reselected to a cell with unstable wireless communication quality can be effectively reduced, making the wireless communication quality of the reselected cell more stable.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to increase the R value of the R criterion. Here, when the R value of the R criterion is increased, it will reduce the difficulty for the terminal to reselect a cell corresponding to this R value.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to reduce the R value of the R criterion. Here, when the R value of the R criterion is reduced, it will increase the difficulty for the terminal to reselect a cell corresponding to this R value.

In one embodiment, in response to the terminal being located in the blocking area of the serving cell, the R value of the R criterion of the adjacent cell can be increased to reduce the difficulty of reselection of the terminal to the adjacent cell and achieve rapid reselection. In this way, it is easier for the terminal to reselect a cell with more stable communication quality.

In one embodiment, in response to the terminal being located in an occlusion area of a neighboring cell, the R value of the R criterion corresponding to the neighboring cell can be reduced to increase the difficulty of the terminal reselecting to the neighboring cell. In this way, the situation where the terminal is reselected to a cell with unstable wireless communication quality can be reduced, making the wireless communication quality of the reselected cell more stable.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to increase the reference distance between the terminal and the adjacent cell. Here, when the reference distance between the terminal and the neighboring cell is increased, the difficulty of the terminal reselecting to the neighboring cell will be reduced. It should be noted that the reference distance between the terminal and the adjacent cell is the set distance threshold. It is used for comparison with the actual measured distance. For example, when the actual measured distance is less than the distance threshold, the adjacent cell can be reselected.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to reduce the reference distance between the terminal and neighboring cells. Here, when the reference distance between the terminal and the neighboring cell is reduced, it will increase the difficulty for the terminal to reselect to the neighboring cell.

In one embodiment, in response to the terminal being located in the blocking area of the serving cell, the reference distance between the terminal and the adjacent cell can be increased to reduce the difficulty of cell reselection for the terminal and achieve rapid reselection. In this way, it is easier for the terminal to reselect a cell with more stable communication quality.

In one embodiment, in response to the terminal being located in an occluded area of a neighboring cell, the reference distance between the terminal and the neighboring cell may be reduced to increase the difficulty of reselection of the terminal to the neighboring cell. In this way, the situation where the terminal is reselected to a cell with unstable wireless communication quality can be reduced, making the wireless communication quality of the reselected cell more stable.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to increase the reference distance between the terminal and the satellite corresponding to the adjacent cell. Here, when the reference distance between the terminal and the satellite corresponding to the adjacent cell is increased, the difficulty of the terminal reselecting to the adjacent cell will be reduced. It should be noted that the reference distance between the terminal and the satellite corresponding to the adjacent cell is the set distance threshold. It is used for comparison with the actual measured distance. For example, when the actual measured distance is less than the distance threshold, the adjacent cell can be reselected.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to reduce the reference distance between the terminal and the satellite corresponding to the adjacent cell. Here, when the reference distance between the terminal and the satellite corresponding to the adjacent cell is reduced, it will increase the difficulty for the terminal to reselect to the adjacent cell.

In one embodiment, in response to the terminal being located in the blocking area of the serving cell, the reference distance between the terminal and the satellite corresponding to the adjacent cell can be increased to reduce the difficulty of the terminal reselecting a cell and achieve rapid reselection. In this way, it is easier for the terminal to reselect a cell with more stable communication quality.

In one embodiment, in response to the terminal being located in an occluded area of a neighboring cell, the reference distance between the terminal and the satellite corresponding to the neighboring cell can be reduced, thereby increasing the difficulty of the terminal reselecting to the neighboring cell. In this way, the situation where the terminal is reselected to a cell with unstable wireless communication quality can be reduced, making the wireless communication quality of the reselected cell more stable.

In one embodiment, the adjustment may be to increase or decrease the parameter value based on the current parameter value according to a preset step size. Here, the parameter value can be adjusted according to a preset step size. Here, the preset step size may be configured by the base station to the terminal. After receiving the preset step size configured by the base station to the terminal, the terminal increases or decreases the parameter value according to the preset step size.

In one embodiment, when the parameters of the cell selected by the terminal to access are parameters of cell handover, the parameters of cell handover may include at least one of the following:

Reference signal received power (RSRP);

Reference signal reception quality (RSRQ);

The reference distance between the terminal and adjacent cells;

The reference distance between the terminal and the satellite corresponding to the adjacent cell;

The reference distance between the terminal and the serving cell;

The reference distance between the terminal and the satellite corresponding to the serving cell;

Waiting time before switching to adjacent cells;

The time point of switching to the adjacent cell;

Timing advance (TA) value;

The elevation angle of the terminal relative to the satellite;

The triggering duration (TTT, Time To Trigger) of conditional switching (CHO).

Here, the above-mentioned cell handover parameters are parameters for cell handover. The parameters for performing cell switching may be parameters for performing cell switching based on conditional handover (CHO).

In one embodiment, adjusting the parameters of the cell selected by the terminal to access may be to increase or decrease the parameter value of the cell handover parameter. Here, using the adjusted parameter values of the cell handover parameters to perform cell handover, compared with using the parameter values of the cell handover parameters before the adjustment to perform cell handover, can reduce the adjacent occlusion area corresponding to the adjacent cell when the terminal switches to the adjacent cell. The probability of a cell or increasing the probability that a terminal that is in the blocking area of the serving cell switches to another cell. Here, other cells may be neighboring cells. Here, the blocking area of the serving cell is the area where the signal of the serving cell is blocked. The blocking area of the adjacent cell is the area where the signal of the adjacent cell is blocked.

Here, reducing the probability of the terminal switching to the neighboring cell corresponding to the occlusion area of the neighboring cell may be to increase the difficulty of the terminal switching to the neighboring cell.

Here, increasing the probability that a terminal that is in the blocking area of the serving cell switches to other cells can reduce the difficulty of the terminal switching to other cells.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to increase the reference signal received power (RSRP) of the serving cell. Here, when the reference signal received power (RSRP) of the serving cell is increased, it will increase the difficulty for the terminal to switch cells.

In one embodiment, adjusting the parameter for the terminal to select an access cell may be to reduce the reference signal received power (RSRP) of the serving cell. Here, when the reference signal received power (RSRP) of the serving cell is reduced, it will reduce the difficulty for the terminal to switch cells.

In one embodiment, in response to the terminal being located in the blocking area of the serving cell, the reference signal received power (RSRP) of the serving cell can be reduced, thereby reducing the difficulty for the terminal to switch cells and achieving fast switching. In this way, the terminal can more easily switch to a cell with more stable communication quality.

In one embodiment, in response to the terminal being located in an obstruction area of a neighboring cell, the reference signal received power (RSRP) of the serving cell may be increased to increase the difficulty for the terminal to switch cells. In this way, the situation of the terminal switching to a cell with unstable communication quality can be reduced, making the wireless communication quality of the switched cell more stable.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to increase the reference signal received power (RSRP) of the adjacent cell. Here, when the reference signal received power (RSRP) of the adjacent cell is increased, it will reduce the difficulty for the terminal to switch to the adjacent cell.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to reduce the reference signal received power (RSRP) of the adjacent cell. Here, when the reference signal received power (RSRP) of the adjacent cell is reduced, it will increase the difficulty for the terminal to switch to the adjacent cell.

In one embodiment, in response to the terminal being located in the blocking area of the serving cell, the reference signal received power (RSRP) of the adjacent cell can be increased to reduce the difficulty of the terminal switching cells and achieve fast switching. In this way, the terminal can more easily switch to a cell with more stable communication quality.

In one embodiment, in response to the terminal being located in an obstruction area of a neighboring cell, the reference signal received power (RSRP) of the neighboring cell may be reduced to increase the difficulty for the terminal to switch to the neighboring cell.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to increase the reference distance between the terminal and the adjacent cell. Here, when the reference distance between the terminal and the neighboring cell is increased, it will reduce the difficulty for the terminal to switch to the neighboring cell. It should be noted that the reference distance between the terminal and the adjacent cell is the set distance threshold. It is used for comparison with the actual measured distance. For example, when the actual measured distance is less than the distance threshold, you can switch to the neighboring cell.

In one embodiment, adjusting the parameters for the terminal to select an access cell may be to reduce the reference distance between the terminal and neighboring cells. Here, when the reference distance between the terminal and the neighboring cell is reduced, it will increase the difficulty for the terminal to switch to the neighboring cell.

In one embodiment, in response to the terminal being located in the blocking area of the serving cell, the reference distance between the terminal and the adjacent cell can be increased to reduce the difficulty of the terminal switching cells and achieve fast switching. In this way, the terminal can more easily switch to a cell with more stable communication quality.

In one embodiment, in response to the terminal being located in an occluded area of a neighboring cell, the reference distance between the terminal and the neighboring cell may be reduced, thereby increasing the difficulty for the terminal to switch to the neighboring cell. In this way, the situation of the terminal switching to a cell with unstable communication quality can be reduced, making the wireless communication quality of the cell after switching more stable.

In the embodiment of the present disclosure, when performing cell selection and reselection, and/or cell handover, if the terminal is located in the occlusion area of the cell, the parameters of cell selection and reselection, and/or the parameters of cell handover will be adjusted in time. Compared with using the same cell selection and reselection parameters, and/or cell handover parameters in any area of the cell, the cell selection and reselection parameters, and/or cell handover parameters can be better adapted. The wireless communication environment of the area where the terminal is located reliably realizes cell selection and reselection, and/or cell handover.

As shown in Figure 6, this embodiment provides a method for accessing a cell. The method also includes:

Step 61: In response to the terminal being located in the blocking area of the cell, adjust the parameters for the terminal to select the access cell, including:

In response to the terminal being located in the blocking area of the serving cell, adjusting the parameter selection of the terminal to access the cell to the parameter value of the adjacent cell;

and / or,

In response to the terminal being located in the blocking area of the adjacent cell, the parameter selection of the access cell selected by the terminal is adjusted to the parameter value of the neighboring cell corresponding to the blocking area.

In one embodiment, in response to the terminal being located within the blocking area of the serving cell, the neighboring cells may be all cells adjacent to the serving cell.

In one embodiment, in response to the terminal being located in the blocking area of the neighboring cell, the neighboring cell is the neighboring cell to which the blocking area belongs.

In one embodiment, adjusting parameter selection to the parameter value of the neighboring cell may be adjusting the parameter value of the selection and reselection parameter of the neighboring cell to one of the following:

The duration for which the reselection criteria are met;

Cell selection reception value S _relex ;

Cell selection quality value S _qual ;

R value of R criterion;

The reference distance between the terminal and adjacent cells;

The reference distance between the terminal and the satellite corresponding to the adjacent cell;

The reference distance between the terminal and the serving cell;

The reference distance between the terminal and the satellite corresponding to the serving cell.

In one embodiment, adjusting the parameter value of the parameter selected to the adjacent cell may be adjusting the parameter value of the handover cell selected to one of the following adjacent cells:

Reference signal received power (RSRP);

Reference signal reception quality (RSRQ);

The reference distance between the terminal and adjacent cells;

The reference distance between the terminal and the satellite corresponding to the adjacent cell;

The reference distance between the terminal and the serving cell;

The reference distance between the terminal and the satellite corresponding to the serving cell;

Waiting time before switching to adjacent cells;

The time point of switching to the adjacent cell;

Timing advance (TA) value;

The elevation angle of the terminal relative to the satellite;

The triggering time (TTT) of conditional switching (CHO).

In one embodiment, adjusting the parameter value of the adjacent cell corresponding to the occlusion area may be adjusted to the parameter value of one of the following selection and reselection parameters of the adjacent cell corresponding to the occlusion area:

The duration for which the reselection criteria are met;

Cell selection reception value S _relex ;

Cell selection quality value S _qual ;

R value of R criterion;

The reference distance between the terminal and adjacent cells;

The reference distance between the terminal and the satellite corresponding to the adjacent cell;

The reference distance between the terminal and the serving cell;

The reference distance between the terminal and the satellite corresponding to the serving cell.

In one embodiment, adjusting the parameter value of the adjacent cell corresponding to the occlusion area may be adjusted to the parameter value of one of the following parameters of the handover cell of the adjacent cell corresponding to the occlusion area:

Reference signal received power (RSRP);

Reference signal reception quality (RSRQ);

The reference distance between the terminal and adjacent cells;

The reference distance between the terminal and the satellite corresponding to the adjacent cell;

The reference distance between the terminal and the serving cell;

The reference distance between the terminal and the satellite corresponding to the serving cell;

Waiting time before switching to adjacent cells;

The time point of switching to the adjacent cell;

Timing advance (TA) value;

The elevation angle of the terminal relative to the satellite;

The triggering time (TTT) of conditional switching (CHO).

As shown in Figure 7, this embodiment provides a method for accessing a cell. Step 41 is to adjust the parameters for the terminal to select the access cell, including:

Step 71: In response to the terminal being in the radio resource control (RRC) idle state, adjust the parameters of cell selection and reselection.

Here, the parameter values of cell selection and reselection parameters may be increased or decreased.

As shown in Figure 8, this embodiment provides a method for accessing a cell. Step 41 is to adjust the parameters for the terminal to select the access cell, including:

Step 81: In response to the terminal being in the (RRC) connected state, adjust the parameters of the cell handover.

Here, the parameter values of cell selection and reselection parameters may be increased or decreased.

In one embodiment, cell handover parameters include:

Parameters based on conditional switching (CHO).

As shown in Figure 9, this embodiment provides a method for accessing a cell. The method also includes:

Step 91: Send a measurement report to the network device; the measurement report carries indication information. The indication information indicates that the terminal is located in the blocking area of the cell, and is used by the network device to determine the cell to which the terminal switches.

In one embodiment, the network device may be a base station.

In one embodiment, when a terminal in a radio resource control (RRC) connected state determines that the terminal is located in a blocking area, and if the terminal is in a blocking area of a neighboring cell, the measurement report carries indication information indicating that the neighboring cell signal is affected.

In one embodiment, when a terminal in a radio resource control (RRC) connected state determines that it is located in a blocking area, and if the terminal is in a blocking area of a serving cell, the measurement report carries indication information indicating that the serving cell signal is affected.

In one embodiment, if the network determines to use the non-conditional handover (CHO) mode to perform handover, it determines the cell to perform handover based on the measurement report reported by the terminal and indication information indicating that the serving cell and/or neighbor cell signals are affected.

As shown in Figure 10, this embodiment provides a method for accessing a cell. The method also includes:

Step 101. Obtain information about obstructions;

Step 102: Determine whether the terminal is located in the obstruction area of the cell according to the information of the obstruction.

In one embodiment, the information of the obstruction includes at least one of the following: location information of the obstruction, altitude information of the obstruction, and shape information of the obstruction. Here, the shape information of the occluder can be information such as height, width, and outline.

In one embodiment, obtaining information about obstructions includes:

Determine the information of the obstruction based on the pre-stored three-dimensional map information;

or,

Receives information about obstructions broadcast by network devices.

Here, the network device may be a base station.

In one embodiment, in response to the distance between the terminal and the obstruction being within a distance threshold range, it is determined whether the terminal is located in the obstruction area of the cell; wherein the distance threshold is determined based on information about the obstruction.

In one embodiment, the terminal can obtain distance information d between the terminal and the obstruction. When the value of d is less than the set distance threshold D, the terminal starts to determine whether the terminal is located in the occlusion area.

In one embodiment, the distance threshold D may be determined based on information about the obstruction. Here, the information of the obstruction may be the location information of the obstruction, the altitude information of the obstruction, and/or the shape information of the obstruction.

In one embodiment, the distance threshold D may be configured by the network for the terminal. In one embodiment, the base station sends a radio resource control (RRC) message carrying the distance threshold D to the terminal.

In one embodiment, if the distance between the terminal and the blocking object is less than the distance threshold D, it can be determined that the terminal is located in the blocking area. If the distance between the terminal and the blocking object is greater than the distance threshold D, it can be determined that the terminal is not located in the blocking area.

In one embodiment, if the distance between the terminal and the obstruction is less than the distance threshold A, it is determined that the terminal is located in the obstruction area. If the distance between the terminal and the obstruction is greater than the distance threshold A, it is determined that the terminal is not located in the obstruction area. Here, the distance threshold A is determined based on the position of the satellite and the information about the obstruction. Here, the information of the obstruction may be the location information of the obstruction, the altitude information of the obstruction, and/or the shape information of the obstruction. Here, the distance threshold A is smaller than the distance threshold D.

In one embodiment, if the distance between the terminal and the blocking object is less than the distance threshold A and the terminal is located within the preset direction interval of the blocking object, it is determined that the terminal is located in the blocking area; otherwise, it is determined that the terminal is not located in the blocking area. Here, the preset direction interval of the obstruction refers to the area range set with the obstruction as the center and the reference direction as the reference. Here, the reference direction may be any one of east, south, west, and north. For example, please refer to Figure 5 again. The default direction interval range is [M, N], where M and N can be represented by east by north, north by east, north by west, west by north, east by south, south by east. , expressed as the α angle of south by west or west by south. Here, the distance threshold A and the preset direction interval may be determined based on the satellite position and obstruction information. Here, the information of the obstruction may be the location information of the obstruction, the altitude information of the obstruction, and/or the shape information of the obstruction. Here, the distance threshold A is smaller than the distance threshold D.

As shown in Figure 11, this embodiment provides a method for accessing a cell. Step 41 is to adjust the parameters for the terminal to select the access cell, including:

Step 111: Increase or decrease the parameter value of the parameter for the terminal to select an access cell by an offset.

In one embodiment, the terminal receives an offset configuration message sent by the network device; wherein the offset configuration message carries the offset.

In one embodiment, a radio resource control (RRC) message carrying an offset configuration message sent by the network device may be received.

In one embodiment, the network device can determine the offset according to the channel transmission environment. Here, since the offset is configured by the network device for the terminal, the terminal can adjust the offset according to the channel transmission environment, allowing the terminal to choose to access the cell. The parameter value adjustment of the parameters is more reasonable.

In one embodiment, the offset is determined based on information about the terminal's location, satellite location information, and obstruction information. In one embodiment, the offset is determined based on the location of the terminal, satellite position information, and obstruction information, including:

The offset is determined based on the mapping relationship between the location information of the terminal, the location information of the satellite, the information of the obstruction and the offset.

In one embodiment, the method further includes:

Receive configuration messages carrying mapping relationships sent by network devices.

Here, the network device may be a base station.

As shown in Figure 12, this embodiment provides a method for accessing a cell. The method also includes:

Step 121. Obtain the ephemeris information of the satellite;

Step 122: Determine the position information of the satellite based on the ephemeris information.

In one embodiment, obtaining satellite ephemeris information includes:

Receive ephemeris information broadcast by network devices;

or,

The ephemeris information is determined based on the satellite's identity identification (ID) and preconfiguration information; wherein the identity identification (ID) is sent by the base station; and the preconfiguration information includes the ephemeris information of at least one satellite.

Here, the network device may be a base station.

In order to better understand any embodiment of the present disclosure, further description is provided through the following exemplary embodiments:

Example 1:

Step a1. The terminal in the radio resource control (RRC) idle state obtains the following information through the system broadcast message: ephemeris information corresponding to the satellites of the serving cell and adjacent cells, obstruction information, and distance parameters corresponding to the obstruction D0 = { D0 ₁ ,…,D0 _n ,…}, obtain the offset Toffset _shadow related to time, the offset Qoffset _shadow related to signal quality, and the offset Doffset _shadow related to distance; here, the terminal may reselect There are three adjacent cells, namely neighbor A, neighbor B and neighbor C.

Step a2: The distance between the terminal and the obstruction n is less than D0 _n , and the terminal begins to periodically determine whether the terminal is located in the obstruction area based on the terminal's location, ephemeris information, and obstruction information.

Step a3: The terminal determines that the terminal is located in the blocking area of adjacent area A, then:

In one embodiment, the duration requirement for reselection to neighboring cell A is set to: T _reselection +Toffset _shadow ; here, T _reselection is the reselection monitoring time;

or,

In one embodiment, the calculation of S _relex and S _qual of neighboring cell A is set to:

S _relex =Q _rxlevmeam -(Q _rxlexmin +Q _{rxlexminoffset} )-P _compensation -Qoffset _temp -Qoffset _shadow ;

S _qual =Q _qualmeam -(Q _qualmin +Q _{qualminoffset} )-Qoffset _temp -Qoffset _shadow ;

Among them, Srxlev is the cell selection reception value; Squal is the cell selection quality value; Q _rxlevmeam is the RSRP value of the measured cell; Q _rxlexmin is the lowest reception level; Q _{rxlexminoffset} is the lowest reception level offset; P _compensation is the maximum terminal uplink The maximum value between the difference between the usable transmit power minus the maximum radio frequency output power of the terminal and 0; Qoffset _temp is the temporary offset value; Q _qualmeam measures the RSRQ value of the cell; Q _qualmin is the minimum received signal quality; Q _{qualminoffset} is the minimum Received signal reception quality offset value;

or,

In one embodiment, the calculation of the R value R _n of neighboring area A is set to:

Rn=Q _meas.n -Qoffset-Qoffset _temp -Qoffset _shadow ; where, Qmeas.n is the reference signal received power (RSRP) measurement value of the adjacent cell; Qoffset _temp is the temporary offset value;

or,

In one embodiment, if a possible condition for accessing neighboring cell A is that the distance between the terminal and the center of neighboring cell A is D<Dth, then D=actually measured D+DOffset _shadow . Among them, D is the distance between the terminal and the center of neighboring cell A; Dth is the distance threshold between the terminal and the center of neighboring cell A.

Here, the above solution makes it more difficult for the terminal to reselect to neighboring cell A. In this way, the wireless communication quality after reselection is more stable.

Example 2:

Step b1. The terminal in the radio resource control (RRC) idle state obtains the following information through the system broadcast message: ephemeris information corresponding to the satellites of the serving cell and neighboring cells, obstruction information, and distance parameters corresponding to the obstruction D0 = { D0 ₁ ,…,D0 _n ,…}, obtain the offset Toffset _shadow related to time, the offset Qoffset _shadow related to signal quality, and the offset Doffset _shadow related to distance.

Step b2: When the distance between the terminal and the obstruction n is less than D0 _n , the terminal begins to periodically determine whether the terminal is located in the obstruction area based on the terminal's location, ephemeris information, and obstruction information.

Step b3: The UE finds that it is located in the affected area of the serving cell satellite signal, then

In one embodiment, the duration requirement of the reselected neighboring cell is set to: T _reselection -Toffset _shadow , and the time for the terminal to stay in this cell can be less than 1s; here, T _reselection is the reselection monitoring time;

or,

In one embodiment, the calculation of S _relex and S _qual of this serving cell is set to:

S _relex =Q _rxlevmeam -(Q _rxlexmin +Q _{rxlexminoffset} )-P _compensation -Qoffset _temp -Qoffset _shadow ;

S _qual =Q _qualmeam -(Q _qualmin +Q _{qualminoffset} )-Qoffset _temp -Qoffset _shadow ;

Among them, Srxlev is the cell selection reception value; Squal is the cell selection quality value; Q _rxlevmeam is the RSRP value of the measured cell; Q _rxlexmin is the lowest reception level; Q _{rxlexminoffset} is the lowest reception level offset; P _compensation is the maximum terminal uplink The maximum value between the difference between the usable transmit power minus the maximum radio frequency output power of the terminal and 0; Qoffset _temp is the temporary offset value; Q _qualmeam measures the RSRQ value of the cell; Q _qualmin is the minimum received signal quality; Q _{qualminoffset} is the minimum Received signal reception quality offset value;

or,

In one embodiment, the calculation of the R value _Rs of this serving cell is set to:

R _s =Q _meas.s -Qoffset-Qoffset _temp -Qoffset _shadow ; where Qmeas.s is the reference signal received power (RSRP) measurement value of the serving cell; Qoffset _temp is the temporary offset value;

or

In one embodiment, if a condition for accessing a neighboring cell is that the distance between the terminal and the center of the neighboring cell is D<Dth, then when the serving cell signal is blocked, D=actually measured D-DOffset _shadow . Among them, D is the distance between the terminal and the center of the adjacent cell; Dth is the distance threshold between the terminal and the center of the adjacent cell.

In this way, the above solution reduces the difficulty for the terminal to reselect to a new cell. In this way, it is easier for the terminal to reselect a cell with more stable communication quality.

Example 3:

Step c1. The terminal in radio resource control (RRC) obtains the following information through the system broadcast message: ephemeris information corresponding to the satellites of the serving cell and neighboring cells, obstruction information, and distance parameters corresponding to the obstruction D0 = {D0 ₁ ,…,D0 _n ,…}, obtain the offset Toffset _shadow related to time, the offset Qoffset _shadow related to signal quality, and the offset Doffset _shadow related to distance.

Step c2: The terminal receives the conditional handover (CHO) condition configured by the network. There are three candidate target neighbor cells, namely neighbor cell A, neighbor cell B, and neighbor cell C;

Step c3: The distance between the terminal and the obstruction n is less than D0 _n , and the terminal begins to periodically determine whether the terminal is located in the obstruction area based on the terminal's location, ephemeris information, and obstruction information.

Step c4. The terminal finds that the terminal is located in the blocking area of neighboring cell A, then:

Step c5: Adjust the conditional handover (CHO) triggering condition parameters corresponding to neighboring cell A, as follows:

In one embodiment, the measurement-based conditional handover (CHO) trigger condition configured by the network, then the RSRP/RSRQ corresponding to neighbor cell A used to determine whether this condition is true is:

RSRP=actually measured RSRP-Qoffset _shadow ;

or,

RSRQ=actually measured RSRQ-Qoffset _shadow ;

or,

In one embodiment, the location-based conditional handover (CHO) trigger condition configured by the network, then the distance D between the terminal and the center of neighboring cell A used to determine whether this condition is true is:

D=actually measured D+Doffset _shadow ;

or,

In one embodiment, the network configures a conditional handover (CHO) trigger condition based on time or timer, then the time setting or timer duration for handover to this neighboring cell is updated to the original configuration parameters of the base station plus the offset value Toffset _shadow ;

or,

In one embodiment, the network configures a conditional handover (CHO) triggering condition based on a timing advance (TA) value or an elevation angle, which is similar to a conditional handover (CHO) triggered based on time and location;

or,

In one embodiment, adjusting the duration requirement for the CHO trigger condition corresponding to neighboring cell A to be met, then:

New trigger duration requirement = original trigger duration requirement + Toffset _shadow ;

Here, the above solution makes it more difficult for the terminal to switch to neighboring cell A. In this way, the wireless communication quality after reselection is more stable.

Example 4:

Step d1. The terminal in the radio resource control (RRC) connected state obtains the following information through the system broadcast message: ephemeris information corresponding to the satellites of the serving cell and adjacent cells, obstruction information, and distance parameters corresponding to the obstruction D0={ D0 ₁ ,…,D0 _n ,…}, obtain the offset Toffset _shadow related to time, the offset Qoffset _shadow related to signal quality, and the offset Doffset _shadow related to distance.

Step d2: The terminal receives the conditional switching (CHO) condition of the network configuration;

Step d3: The distance between the terminal and the obstruction n is less than D0 _n , and the terminal begins to periodically determine whether the terminal is located in the obstruction area based on the terminal's location, ephemeris information, and obstruction information.

Step d4: The terminal determines that the terminal is located in the blocking area of the serving cell, then:

Step d5: Adjust the condition switching (CHO) trigger condition parameters as follows:

In one embodiment, the network configures a measurement-based conditional handover (CHO) trigger condition, and the RSRP/RSRQ corresponding to the serving cell used to determine whether this condition is true is:

RSRP=actually measured RSRP-Qoffset _shadow ;

RSRQ=actually measured RSRQ-Qoffset _shadow ;

or,

In one embodiment, the location-based conditional handover (CHO) trigger condition configured by the network, then the distance D between the terminal and the center of the serving cell used to determine whether this condition is true is:

D=actually measured D+Doffset _shadow ;

or,

In one embodiment, the network configures a conditional handover (CHO) trigger condition based on time or timer, then the time setting or timer duration for handover to the candidate target cell is updated to the original configuration parameter of the base station minus the offset value Toffset _shadow ;

or,

In one embodiment, the network configures a conditional handover (CHO) triggering condition based on a timing advance (TA) value or an elevation angle, which is similar to a conditional handover (CHO) triggered based on time and location;

or,

In one embodiment, adjusting the duration requirement for conditional switching (CHO) triggering conditions to be met is as follows:

New trigger duration requirement = original trigger duration requirement - Toffset _shadow ;

Here, the above technical solution reduces the difficulty for the terminal to switch to a new cell. In this way, it is easier for the terminal to reselect a cell with more stable communication quality.

As shown in Figure 13, this embodiment provides a device for accessing a cell, wherein, when used in a terminal, the device includes an adjustment module 131, where,

The adjustment module 131 is configured to: in response to the terminal being located in the shielding area of the cell, adjust the parameters for the terminal to select the access cell; wherein the parameters for the terminal to select the access cell include: parameters for cell selection and reselection, and/or Cell handover parameters.

In one embodiment, the adjustment module 131 is also configured to:

In response to the terminal being located in the blocking area of the serving cell, adjusting the parameter selection of the terminal to access the cell to the parameter value of the adjacent cell;

and / or,

In response to the terminal being located in the blocking area of the adjacent cell, the parameter selection of the access cell selected by the terminal is adjusted to the parameter value of the neighboring cell corresponding to the blocking area.

Regarding the devices in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

An embodiment of the present disclosure provides a communication device. The communication device includes:

processor;

Memory used to store instructions executable by the processor;

Wherein, the processor is configured to: when executing executable instructions, implement the method applied to any embodiment of the present disclosure.

The processor may include various types of storage media, which are non-transitory computer storage media that can continue to memorize information stored on the communication device after the communication device is powered off.

The processor can be connected to the memory through a bus, etc., and is used to read the executable program stored in the memory.

An embodiment of the present disclosure also provides a computer storage medium, wherein the computer storage medium stores a computer executable program, and when the executable program is executed by a processor, the method of any embodiment of the present disclosure is implemented.

Regarding the devices in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

As shown in Figure 14, an embodiment of the present disclosure shows the structure of a base station. For example, the base station 900 may be provided as a network side device. 14, base station 900 includes a processing component 922, which further includes one or more processors, and memory resources represented by memory 932 for storing instructions, such as application programs, executable by processing component 922. The application program stored in memory 932 may include one or more modules, each corresponding to a set of instructions. In addition, the processing component 922 is configured to execute instructions to perform any of the foregoing methods applied to the base station.

Base station 900 may also include a power supply component 926 configured to perform power management of base station 900, a wired or wireless network interface 950 configured to connect base station 900 to a network, and an input/output (I/O) interface 958. Base station 900 may operate based on an operating system stored in memory 932, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™ or the like.

Other embodiments of the invention will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common common sense or customary technical means in the technical field that are not disclosed in the present disclosure. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It is to be understood that the present invention is not limited to the precise construction described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (21)

1. A method of accessing a cell, wherein, applied to a terminal, the method includes: Determine the offset according to the information about the location of the terminal, the position information of the satellite and the information of the obstruction; In response to the terminal being located in the shielding area of the cell, adjusting the parameters for the terminal to select to access the cell; the adjusting the parameters for the terminal to select to access the cell includes: increasing the parameter value of the parameter for the terminal to select to access the cell. or reduce one of said offsets; Wherein, the parameters for the terminal to select an access cell include: parameters for cell selection and reselection, and/or parameters for cell handover; the access cell is a non-terrestrial network NTN cell. 2. The method according to claim 1, wherein, in response to the terminal being located in the blocking area of the cell, adjusting the parameters of the terminal selected to access the cell includes: In response to the terminal being located in the blocking area of the serving cell, adjusting the parameter selection of the access cell selected by the terminal to the parameter value of the adjacent cell; and / or, In response to the terminal being located in the blocking area of the adjacent cell, adjusting the parameter selection of the access cell selected by the terminal to the parameter value of the neighboring cell corresponding to the blocking area. 3. The method according to claim 1, wherein the adjusting parameters for the terminal to select an access cell includes: In response to the terminal being in the radio resource control RRC idle state, the parameters of the cell selection and reselection are adjusted. 4. The method according to claim 3, wherein the parameters of cell selection and reselection include at least one of the following: The duration for which the reselection criteria are met; Cell selection reception value S _relex ; Cell selection quality value S _qual ; R value of R criterion; The reference distance between the terminal and adjacent cells; The reference distance between the terminal and the satellite corresponding to the adjacent cell; The reference distance between the terminal and the serving cell; The reference distance between the terminal and the satellite corresponding to the serving cell. 5. The method according to claim 1, wherein the adjusting parameters for the terminal to select an access cell includes: In response to the terminal being in the RRC connected state, the parameters of the cell handover are adjusted. 6. The method according to claim 5, wherein the cell switching parameters include: Switch parameters of CHO based on conditions. 7. The method according to claim 6, wherein the parameters of switching CHO based on conditions include at least one of the following: Reference signal received power RSRP; Reference signal reception quality RSRQ; The reference distance between the terminal and adjacent cells; The reference distance between the terminal and the satellite corresponding to the adjacent cell; The reference distance between the terminal and the serving cell; The reference distance between the terminal and the satellite corresponding to the serving cell; Waiting time before switching to neighboring cells; The time point of switching to the adjacent cell; Timing advance TA value; The elevation angle of the terminal relative to the satellite; The triggering time of CHO is TTT. 8. The method according to claim 5, wherein the method further includes: Send a measurement report to the network device; wherein the measurement report carries indication information, the indication information indicates that the terminal is located in the blocking area of the cell, and is used for the network device to determine the location to which the terminal switches. community. 9. The method according to claim 1, wherein the method further includes: Obtain information about obstructions; According to the information of the obstruction, it is determined whether the terminal is located in the obstruction area of the cell. 10. The method according to claim 9, wherein the information of the obstruction includes at least one of the following: location information of the obstruction, altitude information of the obstruction, and shape information of the obstruction. 11. The method according to claim 9, wherein said obtaining information about obstructions includes: Determine the information of the obstruction based on pre-stored three-dimensional map information; or, Receive information about the obstruction broadcast by the network device. 12. The method according to claim 9, wherein the method further includes: In response to the distance between the terminal and the obstruction being within a distance threshold range, it is determined whether the terminal is located in the obstruction area of the cell; wherein the distance threshold is determined based on the information of the obstruction. 13. The method according to claim 1, wherein the method further comprises: Receive an offset configuration message sent by a network device; wherein the offset configuration message carries the offset. 14. The method according to claim 1, wherein determining the offset based on the location of the terminal, satellite position information and obstruction information includes: The offset is determined based on the mapping relationship between the terminal location information, the satellite location information, the obstruction information, and the offset. 15. The method according to claim 14, wherein the method further includes: Receive a configuration message carrying the mapping relationship sent by the network device. 16. The method according to claim 1, wherein the method further comprises: Obtain the ephemeris information of the satellite; The position information of the satellite is determined based on the ephemeris information. 17. The method according to claim 16, wherein said obtaining the ephemeris information of the satellite includes: Receive the ephemeris information broadcast by the network device; or, The ephemeris information is determined based on the identification ID and preconfiguration information of the satellite; wherein the ID is sent by a network device; and the preconfiguration information includes ephemeris information of at least one satellite. 18. A device for accessing a cell, which is used in a terminal, and the device includes an adjustment module, wherein, The adjustment module is configured to: determine the offset based on the information about the location of the terminal, the location information of the satellite, and the information about the obstruction; and adjust the terminal selection access in response to the terminal being located in the obstruction area of the cell. Parameters of the cell; the adjustment of the parameters of the cell selected by the terminal to access includes: increasing or decreasing the parameter value of the parameter of the cell selected by the terminal to access by the offset; wherein, the parameter of the cell selected by the terminal to access is Cell parameters include: cell selection and reselection parameters, and/or cell handover parameters; the access cell is a non-terrestrial network NTN cell. 19. The device according to claim 18, wherein the adjustment module is further configured to: In response to the terminal being located in the blocking area of the serving cell, adjusting the parameter selection of the access cell selected by the terminal to the parameter value of the adjacent cell; and / or, In response to the terminal being located in the blocking area of the adjacent cell, adjusting the parameter selection of the access cell selected by the terminal to the parameter value of the neighboring cell corresponding to the blocking area. 20. A communication device, including: antenna; memory; A processor, respectively connected to the antenna and the memory, configured to control the transmission and reception of the antenna by executing computer-executable instructions stored on the memory, and capable of implementing the method provided in any one of claims 1 to 17 . 21. A computer storage medium, which stores computer-executable instructions. The computer-executable instructions, after being executed by a processor, can implement the method provided in any one of claims 1 to 17.