Cell selection method, mobility indication method, terminal and network side equipment

Abstract

Provided are a cell selection method, a mobility indication method, a terminal and a network side device, the cell selection method comprising: a terminal receiving first indication information sent by a network side device, the first indication information being used for indicating mobility information of a cell corresponding to the network side device; and the terminal selects a resident cell according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side equipment. In the invention, the terminal can select the resident cell according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side equipment, so that the problem of frequent cell switching caused by the mobility of the network side equipment can be effectively avoided, the increase of signaling overhead and time delay caused by cell switching is reduced, and the system performance is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of wireless communication technology, and in particular to a cell selection method, a mobility indication method, a terminal and a network side device. Background Art

[0002] The 6G micro-area network is a wireless network for short-distance communication. It can be deployed in entities such as production line modules, vehicles, and human bodies. It has the characteristics of low power consumption, ultra-low latency, ultra-high reliability, and ultra-dense deployment. It supports wireless connection instead of wired connection in some communication scenarios. The micro-area network usually consists of a control access point (AP) and one or more terminals (UE). The AP uniformly controls and manages the data transmission of the terminals and has functions similar to base stations. As an important part of the 6G network, the micro-area network is generally within the coverage of the large network and can be controlled and managed by the large network base station. The micro-area network has the characteristics of mobility. Compared with traditional fixed base stations, the micro-area AP also has mobility. For example, in the scenarios of body area network and Internet of Vehicles, the micro-area AP moves with the human body and vehicle. In addition, the micro-area AP can also be carried by drones or robots for local signal enhancement or search and detection.

[0003] In the existing technical solution, when the terminal selects a cell, it will select the cell with the strongest received signal and above the threshold value based on the detected reference signal receiving power (RSRP) of the base station broadcast signal. When the terminal selects a cell, it will only make a judgment based on the RSRP value measured at a certain moment, and the terminal does not know whether the micro-domain AP is stationary or moving. This makes it possible that when the terminal is measuring, the micro-domain AP is closest to the terminal, so the terminal measures that the broadcast signal of the micro-domain AP is the strongest, so the terminal will choose to reside in the micro-domain (cell) with the strongest signal. However, at the next moment, the micro-domain AP immediately moves away from the terminal, and the signal strength drops below the threshold value, resulting in the terminal being unable to successfully send and receive information during the process of initiating random access, or after successful access, triggering frequent switching of the micro-domain AP, and the performance of the micro-domain system is reduced.

[0004] For example, if Figure 1 As shown in the figure, under the unified scheduling of the base station, drones AP1 and AP2 hover on a predetermined orbit to enhance the signal in remote areas. The terminal selects the cell corresponding to the appropriate drone AP and selects the cell corresponding to the drone AP. Figure 1It can be seen that the UE is completely within the coverage of AP1. However, at a certain moment, the UE is closer to AP2 than to AP1, and the UE detects a higher RSRP value of the broadcast signal from AP2. The UE will choose to stay in the cell corresponding to AP2. However, when AP2 moves to the far end, the signal strength between the UE and AP2 drops below the threshold, triggering the terminal to switch cells. Summary of the invention

[0005] The embodiments of the present invention provide a cell selection method, a mobility indication method, a terminal and a network side device, which are used to solve the problem that when an AP has mobility, the existing cell selection method may cause frequent switching of cells and degradation of system performance.

[0006] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0007] In a first aspect, an embodiment of the present invention provides a cell selection method, including:

[0008] The terminal receives first indication information sent by a network side device, where the first indication information is used to indicate mobility information of a cell corresponding to the network side device;

[0009] The terminal selects a cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

[0010] Optionally, the mobility information of the cell corresponding to the network side device is used to indicate whether the cell is in a stationary state or a mobile state;

[0011] The mobility information of the terminal is used to indicate that the terminal is in a stationary state, a low-speed moving state, or a high-speed moving state, wherein in the low-speed moving state, the moving speed of the terminal is less than a preset speed threshold, and in the high-speed moving state, the moving speed of the terminal is greater than the preset speed threshold.

[0012] Optionally, the terminal selects a cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device, including:

[0013] If the terminal is in a stationary state or a low-speed moving state, the terminal preferentially selects a stationary cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device;

[0014] and / or

[0015] If the terminal is in a high-speed moving state, the terminal preferentially selects a cell that remains relatively stationary with the terminal to reside according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

[0016] Optionally, if the terminal is in a stationary state or a low-speed moving state, the terminal preferentially selects a stationary cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device, including:

[0017] The terminal measures a received power of a reference signal of a cell corresponding to a network side device to obtain the received power of the reference signal of the cell;

[0018] The terminal determines a first cell list, where reference signal received powers corresponding to cells in the first cell list are greater than or equal to a first threshold;

[0019] If the terminal is in a stationary state or a low-speed moving state, and there are cells in a stationary state in the first cell list, the terminal selects a cell to reside in from the cells in the stationary state in the first cell list;

[0020] and / or

[0021] If the terminal is in a stationary state or a low-speed moving state, and there is no stationary cell in the first cell list, the terminal determines a second cell list, and the reference signal received power corresponding to the cell in the second cell list is less than the first threshold value and greater than or equal to the second threshold value;

[0022] The terminal selects a cell to camp on based on the second cell list.

[0023] Optionally, the terminal selecting a cell to camp on based on the second cell list includes:

[0024] If there are cells in a stationary state in the second cell list, the terminal selects a cell to camp on from the cells in the stationary state in the second cell list.

[0025] Optionally, the terminal selecting a cell to camp on based on the second cell list includes:

[0026] If there is no cell in a stationary state in the second cell list, the terminal obtains second indication information sent by the cell in the first cell list, where the second indication information is used to indicate current location information and movement track information of a network side device corresponding to the cell; the terminal determines a reference signal received power prediction value curve corresponding to the cell in the first cell list according to the second indication information; and selects a cell in which all predicted values ​​in the reference signal received power prediction value curve are higher than the first threshold value to reside;

[0027] or

[0028] If there is no cell in a stationary state in the second cell list, the terminal obtains second indication information sent by the cell in the second cell list, where the second indication information is used to indicate current location information and movement track information of a network side device corresponding to the cell; the terminal predicts a reference signal received power prediction value curve corresponding to the cell in the second cell list according to the second indication information; and selects a cell where all predicted values ​​in the reference signal received power prediction value curve are higher than the second threshold value to reside;

[0029] or

[0030] If there is no stationary cell in the second cell list, the terminal measures the reference signal reception power of the cell corresponding to the network side device multiple times within the first time window, and selects a cell to reside in which the reference signal reception power obtained from the multiple measurements is higher than the first threshold value or the second threshold value.

[0031] Optionally, if the terminal is in a high-speed mobile state, the terminal preferentially selects a cell that remains relatively stationary with the terminal to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device, including:

[0032] The terminal measures a received power of a reference signal of a cell corresponding to a network side device to obtain the received power of the reference signal of the cell;

[0033] The terminal determines a first cell list, where reference signal received powers corresponding to cells in the first cell list are greater than or equal to a first threshold;

[0034] If the terminal is in a high-speed moving state, and the first cell list contains only cells in a stationary state, the terminal selects a cell to reside in from the first cell list;

[0035] and / or

[0036] If the terminal is in a high-speed mobile state and there is a mobile cell in the first cell list, the terminal measures the received power of the reference signal of the cell corresponding to the network side device multiple times within the second time window, and selects a cell to reside in whose received power of the reference signal obtained by multiple measurements is higher than the first threshold value or the second threshold value, and the second threshold value is less than the first threshold value.

[0037] Optionally, selecting a cell for camping on which the reference signal received powers obtained by multiple measurements are all higher than the first threshold value or the second threshold value includes:

[0038] A cell is selected for residence, in which the reference signal received powers obtained through multiple measurements are all higher than the first threshold value or the second threshold value and the moving direction is not opposite to the moving direction of the terminal.

[0039] In a second aspect, an embodiment of the present invention provides a mobility indication method, including:

[0040] The network side device sends first indication information, where the first indication information is used to indicate mobility information of a cell corresponding to the network side device.

[0041] Optionally, the first indication information is carried by a master information block MIB.

[0042] Optionally, the mobility information of the cell corresponding to the network side device is used to indicate whether the cell is in a stationary state or a mobile state;

[0043] Optionally, the method further comprises:

[0044] The network side device sends second indication information, where the second indication information is used to indicate current location information and movement track information of the network side device corresponding to the cell.

[0045] Optionally, the second indication information is carried via a system information block SIB.

[0046] In a third aspect, an embodiment of the present invention provides a terminal, including:

[0047] A first receiving module, used to receive first indication information sent by a network side device, where the first indication information is used to indicate mobility information of a cell corresponding to the network side device;

[0048] The selection module is used to select a resident cell according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

[0049] In a fourth aspect, an embodiment of the present invention provides a network side device, including:

[0050] The first sending module is used to send first indication information, where the first indication information is used to indicate the mobility information of the cell corresponding to the network side device.

[0051] In a fifth aspect, an embodiment of the present invention provides a terminal, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the cell selection method described in the first aspect are implemented.

[0052] In a sixth aspect, an embodiment of the present invention provides a network side device, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the mobility indication method described in the second aspect above are implemented.

[0053] In the seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the cell selection method as described in the first aspect above are implemented; or, when the computer program is executed by a processor, the steps of the mobility indication method as described in the second aspect above are implemented.

[0054] In the embodiment of the present invention, the terminal can select the cell to reside in according to its own mobility information and the mobility information of the cell corresponding to the network side device, which can effectively avoid the problem of frequent cell switching caused by the mobility of the network side device, reduce the increase of signaling overhead and delay caused by cell switching, and improve system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0056] Figure 1 This is a schematic diagram of the drone AP;

[0057] Figure 2 A schematic diagram of a flow chart of a cell selection method according to an embodiment of the present invention;

[0058] Figure 3 A schematic diagram of a MIB message carrying first indication information according to an embodiment of the present invention;

[0059] Figure 4 A schematic diagram of a method for indicating the time-frequency domain position of a PDSCH carrying a SIB_X message according to an embodiment of the present invention;

[0060] Figure 5A schematic diagram of a flow chart of a mobility indication method according to an embodiment of the present invention;

[0061] Figure 6 This is one of the schematic diagrams of the structure of a terminal according to an embodiment of the present invention;

[0062] Figure 7 This is one of the structural schematic diagrams of a cell according to an embodiment of the present invention;

[0063] Figure 8 This is a second schematic diagram of the structure of a terminal according to an embodiment of the present invention;

[0064] Fig. 9 This is the second structural schematic diagram of a cell according to an embodiment of the present invention. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] Please refer to Figure 2 , an embodiment of the present invention provides a cell selection method, including:

[0067] Step 21: The terminal receives first indication information sent by a network side device, where the first indication information is used to indicate mobility information of a cell corresponding to the network side device;

[0068] In the embodiment of the present invention, there may be multiple network-side devices.

[0069] Step 22: The terminal selects a cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

[0070] The network side device and the cell have a corresponding relationship, and one network side device may correspond to one cell or multiple cells. In the embodiment of the present invention, when the network side device moves, the cell corresponding to the network side device also moves.

[0071] In the embodiment of the present invention, the terminal can select the cell to reside in according to its own mobility information and the mobility information of the cell corresponding to the network side device, which can effectively avoid the problem of frequent cell switching caused by the mobility of the network side device, reduce the increase of signaling overhead and delay caused by cell switching, and improve system performance.

[0072] The cell selection method of the embodiment of the present invention can be applied to a micro-area network, which is usually composed of a control access point (AP) and one or more terminals (UE). The AP performs unified control and management on the data transmission of the terminal and has functions similar to a base station. The above-mentioned network side device is the AP. Of course, it is not excluded that the above-mentioned cell selection method is applied to other scenarios, for example, a scenario where a satellite is used as a base station.

[0073] In the embodiment of the present invention, optionally, the first indication information may be carried in a MIB (Master Information Block) message. A mobility field may be added to the MIB message, and a 1-bit indication field may be used to indicate the mobility of the cell, for example, 0 indicates a stationary state, 1 indicates a mobile state, and the 1-bit indication field may occupy a reserved bit of the MIB message, such as Figure 3 shown.

[0074] In the embodiment of the present invention, optionally, the mobility information of the cell corresponding to the network side device is used to indicate whether the cell is in a stationary state or a mobile state.

[0075] Optionally, the mobility information of the terminal is used to indicate that the terminal is in a stationary state, a low-speed moving state, or a high-speed moving state, wherein in the low-speed moving state, the moving speed of the terminal is less than a preset speed threshold, and in the high-speed moving state, the moving speed of the terminal is greater than the preset speed threshold. When the moving speed of the terminal is equal to the preset speed threshold, the terminal can be classified as being in a low-speed moving state or in a high-speed moving state as needed.

[0076] In the embodiment of the present invention, optionally, the terminal selects a cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device, including:

[0077] If the terminal is in a stationary state or a low-speed moving state, the terminal preferentially selects a stationary cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device;

[0078] and / or

[0079] If the terminal is in a high-speed moving state, the terminal preferentially selects a cell that remains relatively stationary with the terminal to reside according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

[0080] The following describes a method for preferentially selecting a stationary cell to reside in when the terminal is in a stationary state or a low-speed moving state according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

[0081] In the embodiment of the present invention, optionally, if the terminal is in a stationary state or a low-speed moving state, the terminal preferentially selects a stationary cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device, including:

[0082] The terminal measures the received power of a reference signal of a cell corresponding to a network side device to obtain RSRP (Reference Signal Received Power) corresponding to the cell;

[0083] The terminal determines a first cell list, where reference signal received powers corresponding to cells in the first cell list are greater than or equal to a first threshold;

[0084] If the terminal is in a stationary state or a low-speed moving state, and there is a stationary cell in the first cell list, the terminal selects a cell to reside in from the stationary cells in the first cell list; optionally, if there is only one stationary cell in the first cell list, then the stationary cell is selected; if there are multiple stationary cells in the first cell list, the terminal selects the stationary cell with the highest RSRP measurement value from the stationary cells in the first cell list to reside in.

[0085] and / or

[0086] If the terminal is in a stationary state or a low-speed moving state, and there is no stationary cell in the first cell list (that is, only a moving cell), the terminal determines a second cell list, and the reference signal received power corresponding to the cell in the second cell list is less than the first threshold value and greater than or equal to the second threshold value;

[0087] The terminal selects a cell to camp on based on the second cell list.

[0088] In the embodiment of the present invention, optionally, the terminal selects a cell to reside in based on the second cell list, including: if there are cells in a stationary state in the second cell list, the terminal selects a cell to reside in from the cells in a stationary state in the second cell list. Optionally, if there is only one cell in a stationary state in the second cell list, the cell in a stationary state can be selected; if there are multiple cells in a stationary state in the second cell list, the terminal selects a stationary cell with the highest RSRP measurement value from the cells in a stationary state in the second cell list to reside in.

[0089] In the embodiment of the present invention, optionally, the terminal selects a cell to reside in based on the second cell list, including:

[0090] If there are no cells in a stationary state in the second cell list (i.e., only cells in a moving state), the terminal obtains second indication information sent by the cells in the first cell list, where the second indication information is used to indicate current location information and movement track information of a network side device corresponding to the cell; the terminal determines a reference signal received power prediction value curve corresponding to the cells in the first cell list according to the second indication information; and selects a cell whose prediction values ​​in the reference signal received power prediction value curve are all higher than the first threshold value to reside in;

[0091] or

[0092] If there are no cells in a stationary state in the second cell list (i.e., there are only cells in a moving state), the terminal obtains second indication information sent by the cells in the second cell list, the second indication information being used to indicate the current location information and movement trajectory information of the network side device corresponding to the cell; the terminal predicts the reference signal received power prediction value curve corresponding to the cells in the second cell list based on the second indication information; and selects a cell in which the predicted values ​​in the reference signal received power prediction value curve are all higher than the second threshold value to reside; in an embodiment of the present invention, optionally, if there are multiple cells in which the predicted values ​​in the reference signal received power prediction value curve are all higher than the second threshold value, a cell in which the RSRP prediction value curve changes smoothly can be selected from the multiple cells in which the predicted values ​​in the reference signal received power prediction value curve are all higher than the second threshold value to reside (for example, a cell in which the standard deviation calculated from different RSRP prediction values ​​in the third time window is the smallest).

[0093] or

[0094] If there is no cell in a stationary state in the second cell list, the terminal measures the received power of the reference signal of the cell corresponding to the network side device multiple times within the first time window, and selects a cell where the received power of the reference signal obtained by the multiple measurements is higher than the first threshold value or the second threshold value to reside;

[0095] or

[0096] If there is no stationary cell in the second cell list, the terminal measures the reference signal reception power of the cell corresponding to the network side device multiple times within the first time window. If a stationary cell with a reference signal reception power higher than the first threshold value or the second threshold value is measured within the first time window, the terminal terminates the measurement and selects the stationary cell with the reference signal reception power higher than the first threshold value or the second threshold value to reside in; otherwise, the cell with the reference signal reception power obtained by multiple measurements higher than the first threshold value or the second threshold value is selected to reside in.

[0097] In an embodiment of the present invention, optionally, if there are multiple cells whose reference signal received powers are all higher than the first threshold value or the second threshold value, a cell with a smoothly changing RSRP prediction value curve can be selected from the multiple cells whose reference signal received powers are all higher than the first threshold value or the second threshold value to reside in (for example, a cell with the smallest standard deviation calculated from different RSRP prediction values ​​in the third time window).

[0098] This solution is applicable to the scenario where there is no stationary cell in the second cell list, and the cell in the second cell list does not send the second indication information, or the terminal does not have the ability to obtain the second indication information, or the terminal does not obtain the second indication information.

[0099] In the embodiment of the present invention, optionally, the first time window may be configured by the network side or may be customized by the terminal.

[0100] The following describes a method for preferentially selecting a stationary cell to reside in when the terminal is in a high-speed mobile state according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

[0101] In the embodiment of the present invention, optionally, if the terminal is in a high-speed mobile state, the terminal preferentially selects a cell that remains relatively stationary with the terminal to reside according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device, including:

[0102] The terminal measures a received power of a reference signal of a cell corresponding to a network side device to obtain the received power of the reference signal of the cell;

[0103] The terminal determines a first cell list, where reference signal received powers corresponding to cells in the first cell list are greater than or equal to a first threshold;

[0104] If the terminal is in a high-speed mobile state and there are only static cells in the first cell list, the terminal selects a cell to reside in from the first cell list; optionally, if there is only one static cell in the first cell list, the static cell is selected to reside in; if there are multiple static cells in the first cell list, the static cell with the highest RSRP measurement value can be selected to reside in.

[0105] and / or

[0106] If the terminal is in a high-speed mobile state, and there are cells in a mobile state in the first cell list, the terminal measures the reference signal receiving power of the cell corresponding to the network side device multiple times within the second time window, and selects a cell where the reference signal receiving power obtained by multiple measurements is higher than the first threshold value or the second threshold value, and the second threshold value is less than the first threshold value. In an embodiment of the present invention, optionally, if there are multiple cells where the reference signal receiving power obtained by multiple measurements is higher than the first threshold value or the second threshold value, a cell with a smooth RSRP prediction value curve can be selected from the multiple cells where the reference signal receiving power obtained by multiple measurements is higher than the first threshold value or the second threshold value to reside (for example, a cell with the smallest standard deviation calculated from different RSRP prediction values ​​within the second time window). In an embodiment of the present invention, the second time window can be configured by the network side or customized by the terminal.

[0107] In an embodiment of the present invention, in order to avoid a situation where the terminal and the network side device approach each other within the second time window and move away from each other beyond the second time window, optionally, a cell where the reference signal receiving power obtained by multiple measurements is higher than the first threshold value or the second threshold value is selected for residence, including: selecting a cell where the reference signal receiving power obtained by multiple measurements is higher than the first threshold value or the second threshold value and the moving direction is not opposite to the moving direction of the terminal.

[0108] In an embodiment of the present invention, the terminal can perform multiple measurements of the received power of the reference signal of the cell corresponding to the network side device within the second time window to obtain a third cell list, and obtain the second indication information of each cell in the third cell list, and obtain the moving direction angle of the cell in the third cell list and the moving direction angle of the terminal at the current moment according to the position and moving direction of the terminal, as well as the current position information and moving trajectory of the cell in the third cell list, and locate the reverse movement of the cell in the third cell list and the moving direction angle of the terminal with a difference greater than a preset angle, and the cell moving in the reverse direction can be excluded. In this case, the second time window can be set shorter, which can reduce the measurement overhead and delay.

[0109] The second indication information is described in detail below.

[0110] In the embodiment of the present invention, only the cell in the moving state will send the second indication information, and the cell in the stationary state will not send it.

[0111] In an embodiment of the present invention, optionally, the second indication information is used to indicate current location information of a network side device corresponding to the cell and movement track information within a next fixed time window.

[0112] In the embodiment of the present invention, optionally, the reference signal received power prediction value curve corresponding to the cells in the second cell list is a reference signal received power prediction value curve in the next time window.

[0113] For scenarios such as intelligent robot inspections and drones equipped with APs, the moving trajectory of a cell in a mobile state is generally a fixed trajectory planned in advance by the network side.

[0114] In an embodiment of the present invention, optionally, the second indication information may be carried in a SIB (System Information Block) message. Further optionally, AP_Location and AP_Trajectory fields may be added to the SIB message for indication. Among them, the AP_Location field indicates the current location information of the network side device corresponding to the cell; the AP_Trajectory field indicates the movement trajectory information of the cell within the next fixed time window, and the movement trajectory information may be represented by the position coordinates of the cell at different times. The fixed time window is defined as a third time window and may be configured by the network side. In addition, due to the mobility of the cell, the information indicated by the AP_Location and AP_Trajectory fields will be periodically updated according to the changes in the mobile position of the cell.

[0115] The SIB message may be a newly defined type of system message, for example, may be recorded as SIB_X, which belongs to other system message types (OSI). In the embodiment of the present invention, optionally, when the terminal has a need, it may send a request to the network side device to obtain SIB_X information, or the terminal may obtain SIB_X according to the configuration information related to SIB_X in the SIB1 message. Figure 4 As shown, the SIB1 message indicates the time-frequency domain location information of the PDSCH (Physical Downlink Shared Channel) carrying the SIB_X message. That is, the terminal obtains the second indication information sent by the cell can be: the terminal obtains the SIB1 message sent by the cell, obtains the configuration information related to SIB_X in the SIB1; receives the SIB_X message on the PDSCH channel according to the configuration information related to SIB_X, and then obtains the second indication information in the SIB_X message.

[0116] In the embodiment of the present invention, optionally, the reference signal of the cell corresponding to the network side device may be a PBCH-DMRS (Physical Broadcast Channel Demodulation Reference Signal). Further optionally, the reference signal and the first indication information may be sent through the same message.

[0117] In an embodiment of the present invention, optionally, the first threshold value corresponding to the above-mentioned first cell list can be configured by the network side. If RSRP is higher than the first threshold value, it means that the signal strength received by the terminal is high and the link quality is good, which can meet the extreme requirements of data interaction between the terminal and the network side device, such as high-speed, low-latency and high-reliability business data transmission.

[0118] In an embodiment of the present invention, optionally, the second threshold value corresponding to the second cell list can be configured by the network side, and the second threshold value is less than the first threshold value. RSRP higher than the second threshold value indicates that the signal strength received by the terminal is average, the link quality is average, and the basic requirements for data interaction between the terminal and the network side device can be met, such as small data volume, low latency requirements, low reliability, and other business data transmission.

[0119] In the embodiment of the present invention, the terminal may calculate RSRP based on the following method:

[0120] RSRP = transmission power of network-side equipment - transmission path loss PL;

[0121] The calculation formula of the transmission path loss PL in free space is: PL (dB) = 32.5 + 20log (f) + 20log (d), where f is the carrier frequency and d is the distance between the transceiver. Combining the location information of the terminal and the moving trajectory of the cell, the change of the distance d between the terminal and the cell in the third time window can be obtained, thereby obtaining the change of the transmission path loss between the terminal and the cell in the third time window. In an embodiment of the present invention, the location information of the terminal can be a GNSS (Global Navigation Satellite System) position.

[0122] Through the above method, the RSRP prediction value curve of the reference signal sent by the cell received by the terminal in the third time window can be predicted.

[0123] In the embodiment of the present invention, it is assumed that the position of the terminal in a stationary state or a slow moving state will not change significantly in a short time. In view of the short-distance transmission characteristics of the micro-area network, the surrounding environment of the micro-area terminal is generally consistent, and the channel difference does not change much.

[0124] Please refer to Figure 5 The embodiment of the present invention further provides a mobility indication method, comprising:

[0125] Step 51: The network side device sends first indication information, where the first indication information is used to indicate the mobility information of the cell corresponding to the network side device.

[0126] Optionally, the first indication information is carried by a master information block MIB.

[0127] Optionally, the mobility information of the cell corresponding to the network side device is used to indicate whether the cell is in a stationary state or a mobile state.

[0128] Optionally, the mobility indication method further includes: the network side device sending second indication information, where the second indication information is used to indicate current location information and movement track information of the network side device.

[0129] Optionally, the second indication information is carried via a system information block SIB.

[0130] Please refer to Figure 6 The embodiment of the present invention further provides a terminal 60, including:

[0131] A first receiving module 61 is used to receive first indication information sent by a network side device, where the first indication information is used to indicate mobility information of a cell corresponding to the network side device;

[0132] The selection module 62 is used to select a cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

[0133] Optionally, the mobility information of the cell corresponding to the network side device is used to indicate whether the cell is in a stationary state or a mobile state;

[0134] The mobility information of the terminal is used to indicate that the terminal is in a stationary state, a low-speed moving state, or a high-speed moving state, wherein in the low-speed moving state, the moving speed of the terminal is less than a preset speed threshold, and in the high-speed moving state, the moving speed of the terminal is greater than the preset speed threshold.

[0135] Optionally, the selection module 62 includes:

[0136] A first selection submodule, configured to, if the terminal is in a stationary state or a low-speed moving state, preferentially select a stationary cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device;

[0137] and / or

[0138] The second selection submodule is used to preferentially select a cell that is relatively stationary with the terminal to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device if the terminal is in a high-speed moving state.

[0139] Optionally, the first selection submodule is used to measure the reference signal reception power of the cell corresponding to the network side device to obtain the reference signal reception power of the cell; determine a first cell list, the reference signal reception power corresponding to the cells in the first cell list is greater than or equal to a first threshold value; if the terminal is in a stationary state or a low-speed moving state, and there are cells in a stationary state in the first cell list, select a resident cell from the stationary cells in the first cell list; and / or, if the terminal is in a stationary state or a low-speed moving state, and there are no stationary cells in the first cell list, determine a second cell list, the reference signal reception power corresponding to the cells in the second cell list is less than the first threshold value and greater than or equal to the second threshold value; select the resident cell based on the second cell list.

[0140] Optionally, selecting the cell to camp on based on the second cell list includes: if there are cells in a stationary state in the second cell list, selecting the cell to camp on from the cells in a stationary state in the second cell list.

[0141] Optionally, the first selection submodule is used to obtain second indication information sent by the cells in the first cell list if there is no cell in a stationary state in the second cell list, the second indication information is used to indicate the current location information and movement trajectory information of the network side device corresponding to the cell; the terminal determines the reference signal received power prediction value curve corresponding to the cells in the first cell list according to the second indication information; and selects cells in which the predicted values ​​in the reference signal received power prediction value curve are all higher than the first threshold value to reside; or, if there is no cell in a stationary state in the second cell list, obtain the second indication information sent by the cells in the second cell list, the second indication information is used to indicate the current location information and movement trajectory information of the network side device corresponding to the cell; predict the reference signal received power prediction value curve corresponding to the cells in the second cell list according to the second indication information; select cells in which the predicted values ​​in the reference signal received power prediction value curve are all higher than the second threshold value to reside; or, if there is no cell in a stationary state in the second cell list, measure the reference signal received power of the cell corresponding to the network side device multiple times within the first time window, and select cells in which the reference signal received power obtained by the multiple measurements is higher than the first threshold value or the second threshold value to reside.

[0142] Optionally, the second selection submodule is used to measure the reference signal reception power of the cell corresponding to the network side device to obtain the reference signal reception power of the cell; determine a first cell list, the reference signal reception power corresponding to the cells in the first cell list is greater than or equal to a first threshold value; if the terminal is in a high-speed mobile state, and there are only cells in a stationary state in the first cell list, select a cell to reside in from the first cell list; and / or, if the terminal is in a high-speed mobile state, and there are cells in a mobile state in the first cell list, measure the reference signal reception power of the cell corresponding to the network side device multiple times within a second time window, and select a cell in which the reference signal reception power obtained by multiple measurements is higher than the first threshold value or the second threshold value, and the second threshold value is less than the first threshold value.

[0143] Optionally, selecting a cell to reside in, where the reference signal reception power obtained from multiple measurements is higher than the first threshold value or the second threshold value, includes: selecting a cell to reside in, where the reference signal reception power obtained from multiple measurements is higher than the first threshold value or the second threshold value, and the moving direction is not opposite to the moving direction of the terminal.

[0144] Please refer to Figure 7 The embodiment of the present invention further provides a network side device 70, including:

[0145] The first sending module 71 is used to send first indication information, where the first indication information is used to indicate the mobility information of the cell corresponding to the network side device.

[0146] Optionally, the first indication information is carried by a master information block MIB.

[0147] Optionally, the mobility information of the cell corresponding to the network side device is used to indicate whether the cell is in a stationary state or a mobile state.

[0148] Optionally, the network side device 70 further includes:

[0149] The second sending module is used to send second indication information, where the second indication information is used to indicate the current location information and movement track information of the network side device.

[0150] Optionally, the second indication information is carried via a system information block SIB.

[0151] Please refer to Figure 8 The embodiment of the present invention further provides a terminal 80, including a processor 81, a memory 82, and a computer program stored in the memory 82 and executable on the processor 81. When the computer program is executed by the processor 81, each process of the above-mentioned cell selection method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0152] Please refer to Fig. 9 The embodiment of the present invention further provides a network side device 90, including a processor 91, a memory 92, and a computer program stored in the memory 92 and executable on the processor 91. When the computer program is executed by the processor 91, the various processes of the above-mentioned mobility indication method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0153] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each process of the above-mentioned cell selection method or mobility indication method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0154] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0155] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0156] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A cell selection method, characterized in that: include: The terminal receives first indication information sent by a network side device, where the first indication information is used to indicate mobility information of a cell corresponding to the network side device; The terminal selects a cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

2. The method according to claim 1, characterized in that: The mobility information of the cell corresponding to the network side device is used to indicate whether the cell is in a stationary state or a mobile state; The mobility information of the terminal is used to indicate that the terminal is in a stationary state, a low-speed moving state, or a high-speed moving state, wherein in the low-speed moving state, the moving speed of the terminal is less than a preset speed threshold, and in the high-speed moving state, the moving speed of the terminal is greater than the preset speed threshold.

3. The method according to claim 2, characterized in that The terminal selects a cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device, including: If the terminal is in a stationary state or a low-speed moving state, the terminal preferentially selects a stationary cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device; and / or, If the terminal is in a high-speed moving state, the terminal preferentially selects a cell that remains relatively stationary with the terminal to reside according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

4. The method according to claim 3, characterized in that If the terminal is in a stationary state or a low-speed moving state, the terminal preferentially selects a stationary cell to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device, including: The terminal measures a received power of a reference signal of a cell corresponding to the network side device to obtain the received power of the reference signal of the cell; The terminal determines a first cell list, where reference signal received powers corresponding to cells in the first cell list are greater than or equal to a first threshold; If the terminal is in a stationary state or a low-speed moving state, and there are cells in a stationary state in the first cell list, the terminal selects a cell to reside in from the cells in the stationary state in the first cell list; and / or, If the terminal is in a stationary state or a low-speed moving state, and there is no stationary cell in the first cell list, the terminal determines a second cell list, and the reference signal received power corresponding to the cell in the second cell list is less than the first threshold value and greater than or equal to the second threshold value; The terminal selects a cell to camp on based on the second cell list.

5. The method according to claim 4, characterized in that The terminal selecting a cell to camp on based on the second cell list includes: If there are cells in a stationary state in the second cell list, the terminal selects a cell to camp on from the cells in the stationary state in the second cell list.

6. The method according to claim 4, characterized in that The terminal selecting a cell to camp on based on the second cell list includes: If there is no cell in a stationary state in the second cell list, the terminal obtains second indication information sent by the cell in the first cell list, where the second indication information is used to indicate current location information and movement track information of a network side device corresponding to the cell; the terminal determines a reference signal received power prediction value curve corresponding to the cell in the first cell list according to the second indication information; and selects a cell in which all predicted values ​​in the reference signal received power prediction value curve are higher than the first threshold value to reside; or, If there is no cell in a stationary state in the second cell list, the terminal obtains second indication information sent by the cell in the second cell list, where the second indication information is used to indicate current location information and movement track information of a network side device corresponding to the cell; the terminal predicts a reference signal received power prediction value curve corresponding to the cell in the second cell list according to the second indication information; and selects a cell where all predicted values ​​in the reference signal received power prediction value curve are higher than the second threshold value to reside; or, If there is no stationary cell in the second cell list, the terminal measures the reference signal reception power of the cell corresponding to the network side device multiple times within the first time window, and selects a cell to reside in which the reference signal reception power obtained from the multiple measurements is higher than the first threshold value or the second threshold value.

7. The method according to claim 3, characterized in that If the terminal is in a high-speed moving state, the terminal preferentially selects a cell that is relatively stationary with the terminal to reside in according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device, including: The terminal measures a received power of a reference signal of a cell corresponding to the network side device to obtain the received power of the reference signal of the cell; The terminal determines a first cell list, where reference signal received powers corresponding to cells in the first cell list are greater than or equal to a first threshold; If the terminal is in a high-speed moving state, and the first cell list contains only cells in a stationary state, the terminal selects a cell to reside in from the first cell list; and / or, If the terminal is in a high-speed mobile state and there is a mobile cell in the first cell list, the terminal measures the received power of the reference signal of the cell corresponding to the network side device multiple times within the second time window, and selects a cell to reside in whose received power of the reference signal obtained by multiple measurements is higher than the first threshold value or the second threshold value, and the second threshold value is less than the first threshold value.

8. The method according to claim 7, characterized in that Selecting a cell where the reference signal received powers obtained by multiple measurements are all higher than the first threshold value or the second threshold value to reside, includes: A cell is selected for residence, in which the reference signal received powers obtained through multiple measurements are all higher than the first threshold value or the second threshold value and the moving direction is not opposite to the moving direction of the terminal.

9. A mobility indication method, characterized in that: include: The network side device sends first indication information, where the first indication information is used to indicate mobility information of a cell corresponding to the network side device.

10. The method according to claim 9, characterized in that The first indication information is carried by a master information block MIB.

11. The method according to claim 9, characterized in that The mobility information of the cell corresponding to the network side device is used to indicate whether the cell is in a stationary state or a mobile state.

12. The method according to claim 9, characterized in that Also includes: The network side device sends second indication information, where the second indication information is used to indicate current location information and movement track information of the network side device.

13. The method according to claim 12, characterized in that The second indication information is carried by a system information block SIB.

14. A terminal, characterized in that: include: A first receiving module, used to receive first indication information sent by a network side device, where the first indication information is used to indicate mobility information of a cell corresponding to the network side device; The selection module is used to select a resident cell according to the mobility information of the terminal and the mobility information of the cell corresponding to the network side device.

15. A network side device, characterized in that: include: The first sending module is used to send first indication information, where the first indication information is used to indicate the mobility information of the cell corresponding to the network side device.

16. A terminal, characterized in that: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the cell selection method according to any one of claims 1 to 8 are implemented.

17. A network side device, characterized in that: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the mobility indication method according to any one of claims 9 to 13 are implemented.

18. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of the cell selection method as described in any one of claims 1 to 8; or, when the computer program is executed by a processor, the computer program implements the steps of the mobility indication method as described in any one of claims 9 to 13.

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