Cell reselection method, device and system

Abstract

The embodiments of the present application provide a cell reselection method, apparatus, and system. The method comprises: receiving reselection configuration information from a network device, the reselection configuration information comprising reselection trigger information, the reselection trigger information being used to trigger the execution of measurements for cell reselection, the reselection trigger information comprising reselection time information or reselection trigger indication information; and performing measurements for cell reselection according to the reselection configuration information. The embodiments of the present application introduce reselection configuration information comprising reselection trigger information, and based on the reselection configuration information, provide an implementation method for a terminal device to perform cell reselection in a cell hopping scenario, which helps to avoid situations where the terminal device cannot communicate normally.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a cell reselection method, device, and system. Background Art

[0002] Because traditional terrestrial networks (TN) cannot provide seamless coverage for terminal devices, especially in places where network equipment cannot be deployed, such as the ocean, desert, and air, non-terrestrial network (NTN) systems have been introduced into the fifth generation (5G) system. NTN systems can include satellite communication systems, high altitude platform station (HAPS) communication systems, or other non-terrestrial communication systems. NTN systems provide seamless coverage for terminal devices by deploying network equipment or some of the network equipment functions on satellites, mobile drones, or mobile hot air balloons. NTN systems are also less affected by natural disasters and can improve the reliability of 5G systems.

[0003] Network devices in the NTN system forward signals from connected ground base stations to form corresponding cells on the ground. Because network devices in the NTN system are mobile, the ground base stations they connect to also change. Depending on the ground base station to which the network device is connected, the signal it sends also varies. Consequently, the cell signal forwarded by the network device may change, a phenomenon known as cell hopping.

[0004] In addition, for the TN system, due to energy saving or other reasons, a certain cell is shut down at a certain time or for a certain period of time, causing the signal of the cell to jump. That is, cell hopping also exists in the TN system.

[0005] For the application scenario of cell hopping, how the terminal device performs cell reselection remains to be solved. Summary of the Invention

[0006] The embodiments of the present application provide a cell reselection method, device, and system for implementing cell reselection in a cell hopping scenario.

[0007] In a first aspect, an embodiment of the present application provides a cell reselection method, comprising: receiving reselection configuration information from a network device, the reselection configuration information including reselection trigger information, the reselection trigger information being used to trigger the execution of measurements for cell reselection, the reselection trigger information including reselection time information or reselection trigger indication information; and performing measurements for cell reselection according to the reselection configuration information.

[0008] Based on the above embodiment, reselection configuration information including reselection trigger information is introduced. Based on the reselection configuration information, an implementation method for the terminal device to perform cell reselection in a cell hopping scenario is given, which helps to avoid the situation where the terminal device cannot communicate normally.

[0009] In some possible implementation methods, the reselection trigger information includes reselection trigger time information; and performing measurements for cell reselection based on the reselection configuration information includes: starting to perform measurements for cell reselection when the time indicated by the reselection trigger time information arrives.

[0010] Based on the above embodiment, the time for starting to perform measurement for cell reselection is indicated through the reselection triggering time information.

[0011] In some possible implementation methods, the reselection trigger information includes reselection trigger indication information; and performing measurements for cell reselection based on the reselection configuration information includes: starting to perform measurements for cell reselection at the moment the reselection trigger indication information is acquired.

[0012] Based on the above embodiment, the time for starting to perform measurement for cell reselection is indicated through the reselection trigger indication information.

[0013] In some possible implementation methods, the reselection configuration information also includes reselection target information, which can be used in combination with the reselection trigger information, and the reselection target information is used to indicate information of a target cell for reselection measurement; performing measurement for cell reselection according to the reselection configuration information includes: determining to perform measurement according to the reselection trigger information; if the target cell is measured and the target cell meets the first criterion, reselecting to the target cell.

[0014] Based on the above embodiment, the measurement target is indicated by the reselection target information, thereby reducing unnecessary reselection measurements and saving energy consumption of the terminal device.

[0015] In some possible implementation methods, the reselection configuration information also includes reselection time range information, which can be used in combination with the reselection target information; if the target cell is measured and the target cell meets the first criterion, reselecting to the target cell includes: if the target cell is measured within the time range indicated by the reselection time range information and the target cell meets the first criterion, reselecting to the target cell.

[0016] Based on the above embodiment, by indicating the measurement target through reselection target information, unnecessary reselection measurements can be reduced, thereby saving energy consumption of the terminal device. Furthermore, by indicating the time range for performing reselection, reselection measurements are performed within a limited time range, thereby reducing the number of reselection measurements and further saving energy consumption of the terminal device.

[0017] In some possible implementation methods, the reselection configuration information is carried in a multicast message, a unicast message, downlink control information, a short message, a paging message, or a system message.

[0018] In a second aspect, embodiments of the present application provide a cell reselection method, comprising: receiving non-reselection configuration information and reselection configuration information from a network device; and determining, based on the non-reselection configuration information, whether to perform measurements for cell reselection according to the reselection configuration information. The reselection configuration information includes at least one of reselection trigger information, reselection target information, and reselection time range information.

[0019] Based on the above embodiment, by introducing the non-reselection configuration information, unnecessary cell reselection of some terminal devices is avoided, thereby saving energy consumption of the terminal devices.

[0020] In some possible implementation methods, the non-reselection configuration information includes non-reselection condition information, and the non-reselection condition information includes information of a measurement target cell; based on the non-reselection configuration information, determining whether to perform measurement according to the reselection configuration information for cell reselection includes: if the measurement target cell is measured, determining not to perform measurement according to the reselection configuration information for cell reselection.

[0021] Based on the above embodiment, by giving a measurement target cell, when the measurement target cell is measured, no cell reselection is performed, that is, the current serving cell is retained, thereby reducing unnecessary measurements and energy consumption of the terminal device.

[0022] In some possible implementation methods, the non-reselection condition information also includes a quality threshold; if the measurement target cell is measured, determining not to perform measurement according to the reselection configuration information for cell reselection includes: if the measurement target cell is measured and the quality of the measurement target cell is higher than the quality threshold, determining not to perform measurement according to the reselection configuration information for cell reselection.

[0023] In some possible implementation methods, the non-reselection configuration information includes non-reselection area information; based on the non-reselection configuration information, it is determined whether to perform measurements according to the reselection configuration information to perform cell reselection, including: if the terminal device is located in the area indicated by the non-reselection area information, determining not to perform measurements according to the reselection configuration information to perform cell reselection.

[0024] Based on the above embodiment, by giving non-reselection time zone information, when in the non-reselection time zone, no cell reselection is performed, that is, the terminal stays in the current serving cell, which can reduce unnecessary measurements and reduce energy consumption of the terminal device.

[0025] In some possible implementation methods, the non-reselection configuration information includes non-reselection time range information; based on the non-reselection configuration information, determining whether to perform measurements according to the reselection configuration information for cell reselection includes: determining that within the non-reselection time range, cell measurements for reselection are not performed according to the reselection configuration information.

[0026] Based on the above embodiment, by giving non-reselection time range information, when in the non-reselection time range, no cell reselection is performed, that is, the terminal device stays in the current serving cell, which can reduce unnecessary measurements and reduce energy consumption of the terminal device.

[0027] In some possible implementation methods, after determining not to perform measurements for cell reselection according to the reselection configuration information, no measurements are performed for cell reselection.

[0028] In some possible implementation methods, after determining not to perform measurements for cell reselection based on the reselection configuration information, measurements are performed for cell reselection based on the reselection priority configuration information of the neighboring cells of the serving cell, and the reselection priority configuration information includes dedicated reselection priority configuration information and / or public reselection priority configuration information.

[0029] In some possible implementation methods, after determining to perform measurements for cell reselection according to the reselection configuration information, measurements are performed for cell reselection according to the reselection configuration information.

[0030] In some possible implementation methods, the reselection configuration information includes reselection trigger information, where the reselection trigger information is used to trigger measurement to perform cell reselection, and the reselection trigger information includes reselection trigger time information or reselection trigger indication information.

[0031] In some possible implementation methods, the reselection trigger information includes reselection trigger time information; and performing measurements for cell reselection based on the reselection configuration information includes: starting to perform measurements for cell reselection when the time indicated by the reselection trigger time information arrives.

[0032] In some possible implementation methods, the reselection trigger information includes reselection trigger indication information; and performing measurements for cell reselection based on the reselection configuration information includes: starting to perform measurements for cell reselection at the moment the reselection trigger indication information is acquired.

[0033] In some possible implementation methods, the reselection configuration information also includes reselection target information, and the reselection target information is used to indicate information of a target cell to be measured after the reselection is triggered; performing measurement for cell reselection according to the reselection configuration information includes: determining to perform measurement according to the reselection trigger information; if the target cell is measured and the target cell meets the first criterion, reselecting to the target cell.

[0034] In some possible implementation methods, the reselection configuration information also includes reselection time range information; if the target cell is measured and the target cell meets the first criterion, reselecting to the target cell includes: if the target cell is measured within the time range indicated by the reselection time range information and the target cell meets the first criterion, reselecting to the target cell.

[0035] In some possible implementation methods, the above reselection configuration information and non-reselection configuration information may be carried in a multicast message, a unicast message, downlink control information, a short message, a paging message, or a system message.

[0036] In a third aspect, an embodiment of the present application provides a cell reselection method, comprising: receiving cell reselection indication information of a serving cell from a network device, the cell reselection indication information being used to indicate that the serving cell is a hopping cell; performing cell measurement according to the cell reselection indication information, and obtaining at least one candidate cell that meets a first criterion; determining to reselect and reside in a target cell, the target cell being a non-hopping cell among the at least one candidate cell, and the target cell being a suitable cell.

[0037] Based on the above embodiment, before a cell hopping occurs, the network device instructs the terminal device to reselect to another non-hopping cell or remain in the current serving cell. This helps to avoid the impact of cell hopping on the terminal device's services, ensuring the terminal device's service experience. It also helps to avoid increased energy consumption of the terminal device caused by unnecessary reselection.

[0038] In some possible implementation methods, the cell reselection indication information is carried in a multicast message, a unicast message, downlink control information, a short message, a paging message, or a system message.

[0039] In a fourth aspect, an embodiment of the present application provides a cell reselection method, comprising: determining reselection configuration information, the reselection configuration information including one or more of reselection trigger information, reselection target information, reselection time range information, and cell reselection indication information, the reselection trigger information being used to trigger the execution of measurements for cell reselection, the reselection trigger information including reselection trigger time information or reselection trigger indication information, the reselection target information being used to indicate information of a target cell for reselection measurement, the reselection time range information being used to indicate a time range for measuring the target cell, and the small reselection indication information being used to indicate that the service cell of the terminal device is a hopping cell; and sending the reselection configuration information to the terminal device, the reselection configuration information being used by the terminal device to perform measurements for cell reselection.

[0040] Based on the above embodiment, by introducing reselection configuration information, the terminal device in the cell hopping scenario can perform cell reselection, avoiding the abnormal situation of being out of service area, and also reducing unnecessary reselection measurements and saving energy consumption of the terminal device.

[0041] In some possible implementation methods, non-reselection configuration information can also be sent to the terminal device, and the non-reselection configuration information is used by the terminal device to determine whether to perform measurements based on the reselection configuration information to perform cell reselection. The non-reselection configuration information includes one or more of non-reselection condition information, quality threshold, non-reselection area information, and non-reselection time range information. The non-reselection condition information includes information on the target cell to be measured.

[0042] In a fifth aspect, an embodiment of the present application provides a communication device, which may be a terminal device or a chip for a terminal device. The device has the function of implementing the above-mentioned first aspect, or the second aspect, or the third aspect, or the various embodiments of the first aspect, or the various embodiments of the second aspect, or the various embodiments of the third aspect. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

[0043] In a sixth aspect, embodiments of the present application provide a communications device, which may be a network device or a chip for a network device. The device has the functions of implementing the fourth aspect or each embodiment of the fourth aspect. The functions may be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

[0044] In the seventh aspect, an embodiment of the present application provides a communication device, comprising a processor and a memory; the memory is used to store computer-executable instructions, and when the device is running, the processor executes the computer-executable instructions stored in the memory to enable the device to perform the methods of the above-mentioned first to fourth aspects, or the embodiments of the first to fourth aspects.

[0045] In an eighth aspect, an embodiment of the present application provides a communication device, comprising a unit or means for executing each step of the above-mentioned first to fourth aspects, or each embodiment of the first to fourth aspects.

[0046] In a ninth aspect, an embodiment of the present application provides a communication device, comprising a processor and an interface circuit, wherein the processor is configured to communicate with other devices or modules via the interface circuit and execute the methods of the first to fourth aspects, or the embodiments of the first to fourth aspects, described above. The processor may include one or more. Optionally, the device may further include a memory, which may be configured to store instructions and / or data.

[0047] In a tenth aspect, an embodiment of the present application provides a communication device, comprising a processor, configured to be connected to a memory and configured to call a program stored in the memory to execute the method of the first to fourth aspects, or each embodiment of the first to fourth aspects, described above. The memory may be located within or outside the device. The processor may include one or more processors.

[0048] In the eleventh aspect, an embodiment of the present application further provides a computer-readable storage medium, in which instructions are stored. When the computer-readable storage medium is run on a computer, the methods described in the above-mentioned first to fourth aspects, or the embodiments of the first to fourth aspects, are executed.

[0049] In the twelfth aspect, an embodiment of the present application further provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method described in the above-mentioned first to fourth aspects, or the embodiments of the first to fourth aspects.

[0050] In the thirteenth aspect, an embodiment of the present application further provides a chip system, comprising: a processor for executing the method described in the above-mentioned first to fourth aspects, or each embodiment of the first to fourth aspects.

[0051] In a fourteenth aspect, an embodiment of the present application further provides a communication system, comprising: a terminal device and a network device. The network device is configured to send reselection configuration information to the terminal device, the reselection configuration information including reselection trigger information, the reselection trigger information being used to trigger execution of measurements for cell reselection, the reselection trigger information including reselection time information or reselection trigger indication information. The terminal device is configured to perform measurements for cell reselection based on the reselection configuration information.

[0052] In a fifteenth aspect, an embodiment of the present application further provides a communication system, comprising: a terminal device and a network device. The network device is configured to send reselection configuration information and non-reselection configuration information to the terminal device, the reselection configuration information including reselection trigger information, the reselection trigger information being used to trigger execution of measurements for cell reselection, the reselection trigger information including reselection time information or reselection trigger indication information. The terminal device is configured to determine, based on the non-reselection configuration information, whether to execute measurements for cell reselection based on the reselection configuration information.

[0053] In a sixteenth aspect, an embodiment of the present application provides a cell reselection system, comprising: a terminal device and a network device. The network device is configured to send cell reselection indication information of a serving cell of the terminal device to the terminal device, wherein the cell reselection indication information is used to indicate that the serving cell is a hopping cell. The terminal device is configured to perform cell measurement based on the cell reselection indication information, and obtain at least one candidate cell that meets a first criterion; determine to reselect and reside in a target cell, wherein the target cell is a non-hopping cell among the at least one candidate cell, and the target cell is a suitable cell.

[0054] In the seventeenth aspect, an embodiment of the present application also provides a communication method, including: a network device sends reselection configuration information to a terminal device, the reselection configuration information includes reselection trigger information, the reselection trigger information is used to trigger the execution of measurements for cell reselection, the reselection trigger information includes reselection time information or reselection trigger indication information; the terminal device performs measurements for cell reselection according to the reselection configuration information.

[0055] In the eighteenth aspect, an embodiment of the present application also provides a communication method, including: a network device sends reselection configuration information and non-reselection configuration information to a terminal device, the reselection configuration information includes reselection trigger information, the reselection trigger information is used to trigger the execution of measurements for cell reselection, and the reselection trigger information includes reselection time information or reselection trigger indication information; the terminal device determines whether to perform measurements for cell reselection based on the reselection configuration information based on the non-reselection configuration information.

[0056] In a nineteenth aspect, an embodiment of the present application provides a cell reselection method, comprising: a network device sending cell reselection indication information of a serving cell of the terminal device to a terminal device, the cell reselection indication information being used to indicate that the serving cell is a hopping cell. The terminal device performs cell measurement based on the cell reselection indication information, and obtains at least one candidate cell that meets a first criterion. The terminal device determines to reselect and camp on a target cell, the target cell being a non-hopping cell among the at least one candidate cell, and the target cell being a suitable cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 A schematic diagram of a network architecture applicable to this application;

[0058] Figure 2A This is an example diagram of cell hopping under satellite;

[0059] Figure 2B This is another example diagram of cell hopping under satellite;

[0060] Figure 3 A schematic diagram of a cell reselection method provided in an embodiment of the present application;

[0061] Figure 4 A schematic diagram of another cell reselection method provided in an embodiment of the present application;

[0062] Figure 5 A schematic diagram of another cell reselection method provided in an embodiment of the present application;

[0063] Figure 6 A schematic diagram of another cell reselection method provided in an embodiment of the present application;

[0064] Figure 7 A schematic diagram of a communication device provided in an embodiment of the present application;

[0065] Figure 8 A schematic diagram of another communication device provided in an embodiment of the present application;

[0066] Figure 9 A schematic diagram of a terminal device provided in an embodiment of the present application;

[0067] Figure 10 A schematic diagram of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0068] like Figure 1The figure shows a schematic diagram of a network architecture applicable to embodiments of the present application, including terminal devices and network devices. The network devices are deployed in an NTN system, such as on satellites, mobile drones, or mobile hot air balloons. The terminal devices communicate with the network devices via wireless interfaces.

[0069] A terminal device is a device with wireless transceiver capabilities that can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; on water (such as ships); or in the air (such as airplanes, balloons, and satellites). The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in smart grids, a wireless terminal in transportation safety, a wireless terminal in smart cities, a wireless terminal in smart homes, or a user equipment (UE).

[0070] A network device is a device in a wireless network, such as a radio access network (RAN) node that connects a terminal device to the wireless network. Currently, some examples of RAN nodes include: gNB, transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved Node B, or home Node B, HNB), base band unit (BBU), wireless fidelity (W') access point (AP), integrated access and backhaul (iAB), etc. In a network structure, a network device may include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node. In one network architecture, the centralized unit (CU) node can be divided into a control plane (CU-CP) and a user plane (CU-UP). The CU-CP is responsible for control plane functions, primarily including Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP)-C. PDCP-C is responsible for control plane data encryption, integrity protection, and data transmission. The CU-UP is responsible for user plane functions, primarily including Service Data Adaptation Protocol (SDAP) and PDCP-U. SDAP is responsible for processing core network data and mapping flows to bearers. PDCP-U is responsible for data plane encryption, integrity protection, header compression, sequence number maintenance, and data transmission. The CU-CP and CU-UP are connected via the E1 interface. The CU-CP represents the CU's connection to the core network via the Ng interface. It connects to the DU via F1-C (control plane). The CU-UP connects to the DU via F1-U (user plane). Alternatively, the PDCP-C may also reside in the CU-UP.

[0071] The network equipment in the embodiments of the present application can be a network equipment of an NTN system (such as a satellite communication system, a high-altitude platform communication system, or other non-terrestrial communication system), or it can be a network equipment of a TN system. For ease of explanation, the embodiments of the present application will be described later using the example of a network equipment deployed on a satellite. Furthermore, for ease of description, the embodiments of the present application will replace "network equipment on a satellite" with "satellite" for description. That is, the communication between a terminal device and a satellite involved in the embodiments of the present application later actually refers to the communication between the terminal device and the network equipment on the satellite. This is described here uniformly and will not be repeated later.

[0072] According to the satellite altitude, that is, the satellite orbit height, satellite systems can be divided into the following three categories:

[0073] 1) Geostationary-Earth Orbit (GEO) satellites: Also known as geostationary satellites, these satellites move at the same speed as the Earth's rotational system, remaining stationary relative to the Earth. Consequently, the cells of GEO satellites are also stationary. GEO satellite cells offer large coverage areas, with a cell diameter of, for example, 500 kilometers.

[0074] 2) Low-Earth Orbit (LEO) satellites: Satellites move relatively fast relative to the ground, at approximately 7 km / s, so the service coverage area provided by LEO satellites also moves accordingly.

[0075] 3) Medium-orbit satellite: a satellite between high orbit and low orbit.

[0076] The satellites involved in the embodiments of the present application may be low-orbit satellites, and may also be extended to medium-orbit satellites or other mobile network devices. For ease of description, the embodiments of the present application are referred to as satellites in the following.

[0077] When satellites provide service coverage areas, there are generally two forms.

[0078] The first form is transparent forwarding, in which a satellite forwards cell information from a terrestrial network device (such as a base station; the following examples assume that the terrestrial network device is a terrestrial base station). In this transparent forwarding mode, the satellite cell can be fixed on the ground or move with the satellite. A fixed satellite cell means that its ground coverage is fixed. Specifically, it can be fixed for a period of time or permanently fixed. The satellite cell moves with the satellite; that is, when the satellite moves, the cell it generates also moves on the ground. If the satellite remains connected to the original base station during movement, one possible scenario is that the cell of the original base station follows the satellite for a while (i.e., maintains a connection for a period of time). When the satellite connects to a new base station, the satellite forwards the cell information of the new base station. In this transparent forwarding mode, the satellite receives signals from the terrestrial base station and forwards them to the ground. Although the satellite is constantly in motion, the position of the terrestrial base station remains unchanged. Therefore, although the cell information of the terrestrial base station forwarded by the satellite will move with the satellite's movement, the cell's movement range is always around the base station.

[0079] In a possible design, a cell may be identified by a physical cell identifier (PCI) and a frequency, or a cell global identifier (CGI).

[0080] The second form is the regenerative form, that is, the satellite can generate cell information by itself. For example, in this form, the satellite can include network devices with similar functions such as DU, base station or IAB. In the regenerative form, the satellite cell can be fixed on the ground or move with the movement of the satellite. The satellite cell is fixed on the ground, which means that the coverage of the satellite cell on the ground is fixed. Specifically, it can be fixed for a period of time or permanently fixed. The satellite cell moves with the movement of the satellite, that is, when the satellite moves, the cell it generates also moves on the ground. When the satellite moves, one possible implementation method is that the cell it generates also moves on the ground. That is, the network equipment on the satellite does not dynamically adjust the beam direction, and the beam generated by the network equipment on the satellite moves on the ground as the satellite moves.

[0081] Generally, when a satellite moves, a new satellite will be moved in to ensure the best possible continuous coverage. The coverage area of the new satellite can be the same as or different from the previous satellite. Understandably, due to differences in satellite orbital orientation, beam transmission direction, and beam transmission capabilities, the ground coverage areas of two satellites may not be exactly the same.

[0082] For the first type of satellite (i.e., a transparent forwarding satellite), since the satellite is mobile, it forms a corresponding cell by forwarding signals from its connected ground base station to the ground. Depending on the ground base station to which the satellite is connected, the signal sent by the satellite varies, resulting in possible hopping in the cell signal forwarded by the satellite. There are two types of hopping, which are described below.

[0083] In hopping mode 1, a satellite can simultaneously connect to multiple (or more than one) ground base stations. When a satellite hops from connecting to base station 1 to base station 2, it transmits the cell signals of both base stations 1 and 2 for a period of time. However, at a certain point, the satellite no longer forwards the cell signal of base station 1, meaning that the cell signal of base station 1 suddenly disappears from the original coverage area. In this embodiment of the present application, the cell of base station 1 can be referred to as the "hopping cell."

[0084] In hopping mode 2, a satellite connects to only one ground base station at a time. When a satellite hops from base station 1 to base station 2, it immediately forwards the cell signal of base station 2 after connecting to base station 2, disconnecting from base station 1 and no longer forwarding the cell signal of base station 1. This means that the cell signal of base station 1 suddenly disappears from the satellite's original coverage area, while the cell signal of base station 2 suddenly reappears. In this embodiment of the present application, the cell of base station 1 can be referred to as the "hopping cell."

[0085] "Cell hopping" can be understood as a dynamic cell, that is, after a certain moment or for a period of time, the cell's signal does not exist or disappears in a certain area. Optionally, the original coverage area of the cell can be provided with communication by the new cell.

[0086] The embodiments of this application use the NTN system as an example. It is understood that the embodiments of this application are also applicable to the TN system. For example, in the TN system, for energy saving or other reasons, a cell is shut down at a certain time or for a certain period of time. The shut down cell can also be considered a "hopping cell."

[0087] No matter how the satellite cell information changes, the cell information corresponding to some areas may not change. Figure 2A The figure shows an example of cell hopping under a satellite. This example assumes that satellite 1 and satellite 2 only support forwarding the cell signal of one base station. In the figure, the satellite moves from left to right.

[0088] At time T1: Satellite 1 is connected to base station 1 and forwards the signal of cell 1 of base station 1; Satellite 2 is connected to base station 2 and forwards the signal of cell 2 of base station 2; Satellite 3 is connected to base station 3 and forwards the signal of cell 3 of base station 3.

[0089] At time T2 (a moment before cell hopping is about to occur): satellite 1 is connected to base station 1 and forwards the signal of cell 1 of base station 1; satellite 2 is connected to base station 2 and forwards the signal of cell 2 of base station 2; satellite 3 is connected to base station 3 and forwards the signal of cell 3 of base station 3.

[0090] At time T2, compared with time T1, the cell moves with the movement of the satellite, but cell hopping has not occurred yet.

[0091] As the satellite moves to the right, satellite 1 will disconnect from base station 1 and jump to connect with base station 2. Satellite 2 will disconnect from base station 2 and jump to connect with base station 3.

[0092] At time T3 (the moment when cell hopping occurs or a certain moment after the hopping occurs): Satellite 0 is connected to base station 1 and forwards the signal of cell 1 of base station 1; Satellite 1 is connected to base station 2 and forwards the signal of cell 2 of base station 2; Satellite 2 is connected to base station 3 and forwards the signal of cell 3 of base station 3.

[0093] from Figure 2A As can be seen in the figure, the area covered by cells 1 and 2 before the hopping is now covered by cells 2 and 3 after the hopping. That is, satellite 1 switches from connecting to base station 1 and forwarding the signal of cell 1 of base station 1 to connecting to base station 2 and forwarding the signal of cell 2 of base station 2. Satellite 2 switches from connecting to base station 2 and forwarding the signal of cell 2 of base station 2 to connecting to base station 3 and forwarding the signal of cell 3 of base station 3.

[0094] Moreover, when there is an overlapping coverage area between cell 1 and cell 2 before the hopping (for example, at time T2), the signal of cell 2 always exists in the area before and after the hopping. Figure 2A At time T2, UE1 is in the overlapping coverage area of cell 1 and cell 2, and the signals of cell 1 and cell 2 exist in this area. At time T3, due to the movement of the satellite, assuming that UE1 has not moved or has not moved out of the above overlapping coverage area, UE1 will be in the overlapping coverage area of cell 2 and cell 3, and the signals of cell 2 and cell 3 exist in this area. Therefore, it can be seen that the signal of cell 2 always exists in the overlapping coverage area before and after the hopping. For UEs in the overlapping coverage area (such as Figure 2A If UE1 reselects to cell 3 after the hopping, it will need to reselect from cell 3 back to cell 2 as the satellite continues to move. This will cause the UE to frequently change its camped cell, increasing UE energy consumption.

[0095] In summary, for the application scenario of cell hopping, how the UE performs cell reselection is a problem to be solved by the embodiments of the present application.

[0096] like Figure 3As shown, an embodiment of the present application provides a cell reselection method. This method can be applied to cell hopping scenarios. On the UE side, the method can be performed by the UE, or a component for the UE (such as a chip or circuit, etc.). On the network side, the method can be performed by a network device (which can be a RAN device, a DU, or a CU), or a component for the network device (such as a chip or circuit, etc.). For ease of explanation, the following description takes the UE and the network device performing the method as an example.

[0097] The method comprises the following steps:

[0098] Step 301: The network device sends reselection configuration information to the UE.

[0099] Accordingly, the UE may receive the reselection configuration information.

[0100] When the network device is deployed on a satellite, taking transparent forwarding as an example, the network device may receive the reselection configuration information from the base station of the TN and forward it to the UE.

[0101] The reselection configuration information includes configuration information for reselection. The reselection configuration information may include at least one of reselection trigger information and reselection target information. Optionally, the reselection configuration information may also include reselection time range information.

[0102] Optionally, the reselection configuration information may be carried in any of a system message, a paging message, a multicast message, a unicast message, a short message, or a downlink control message. The reselection trigger information is used to trigger the UE to perform measurements for cell reselection. That is, when the reselection trigger information is satisfied, the UE performs measurements for cell reselection regardless of whether the quality of the UE's serving cell meets the reselection conditions. The reselection trigger information may include reselection trigger time information or reselection trigger indication information.

[0103] The reselection trigger time information is used to instruct the UE to immediately perform measurements to perform a cell reselection process when the reselection trigger time arrives. The above-mentioned "reselection trigger time information" can be expressed in a variety of ways. For example, the reselection trigger time information can be an absolute time (such as universal time coordinated, UTC, global positioning system (GPS) clock, network broadcast system frame number (SFN systemframe number, SFN) and other time information at least one); and / or, the reselection trigger time information can be a relative time (such as GPS clock count offset, relative SFN offset with reference to network broadcast SFN and other time information at least one). As an implementation method, when the reselection trigger time information includes absolute time and relative time, the UE can determine the reselection trigger time based on the above-mentioned absolute time and relative time.

[0104] The reselection trigger indication information is used to instruct the UE to immediately perform measurements for cell reselection. The reselection trigger indication information may also be referred to as a reselection trigger command or a reselection trigger instruction. For example, the UE may be triggered to immediately perform measurements for cell reselection by at least one bit of information. As an implementation method, the UE may immediately perform measurements according to the reselection priority configuration information of the neighboring cells of the serving cell based on the reselection trigger indication information. The reselection priority configuration information may include, for example, one or more of the frequency information, the frequency priority information, and the PCI information under the frequency. The neighboring cells of the serving cell include one or more of the same-frequency neighboring cells, different-frequency neighboring cells, and different-system neighboring cells. The reselection priority configuration information may include dedicated reselection priority configuration information and / or public reselection priority configuration information. The reselection priority configuration information sent through dedicated signaling may be referred to as dedicated reselection priority configuration information, and the reselection priority configuration information sent through system messages may be referred to as public reselection priority configuration information. It can be understood that in an embodiment of the present application, the reselection configuration information and the reselection priority configuration information can be sent to the UE through different messages or through different signaling processes, or the reselection configuration information can also be sent to the UE through one message together with the reselection priority configuration information.

[0105] It is understood that the aforementioned "UE performing measurements" may include the UE performing at least one of measurements on its own cell, intra-frequency measurements, inter-frequency measurements, and inter-system measurements. Alternatively, "UE performing measurements" may be understood as the UE performing measurements for cell reselection. Optionally, as a possible approach, the UE may perform measurements on the serving cell periodically. Furthermore, "UE not performing measurements" may be understood as the UE not performing measurements for cell reselection.

[0106] The reselection target information is used to indicate information about the target cell for reselection measurement; alternatively, the reselection target information is used to trigger the UE to perform measurements based on the target cell information for cell reselection. The reselection target information may be the frequency of the target cell, or the frequency and physical cell identifier of the target cell. Optionally, the reselection target information may also be used to indicate that the target cell has the highest priority. It is understood that when the reselection target information exists, "UE performs measurements" may at least include "UE performs measurements based on the target cell information."

[0107] The reselection time range information is used to indicate that within the time range, the UE can perform measurements based on the reselection trigger information and / or the reselection target information to perform cell reselection. The reselection time range information may include a time length, or a start time information and a time length, or a start time information and an end time information, or an end time information. At other times except for the reselection time range information, the UE may ignore the reselection trigger information and / or the reselection target information. For example, the UE may perform measurements based on the reselection priority configuration information described above to perform cell reselection. In other words, the reselection time range information limits the effective time of the reselection trigger information and / or the reselection target information. Within the time range indicated by the reselection time range information, the reselection trigger information and / or the reselection target information is valid, and outside the time range indicated by the reselection time range information, the reselection trigger information and / or the reselection target information is invalid. For example, the UE may ignore the reselection trigger information and / or the reselection target information. In one possible manner, when the reselection trigger information and / or the reselection target information is invalid, the UE performs measurements according to normal procedures or rules to perform cell reselection (that is, the UE performs a traditional cell reselection procedure). The traditional cell reselection procedure, for example, refers to the corresponding sections in TS38.304 v15.4.0 or TS36.304 v15.4.0.

[0108] Step 302: The UE performs measurements for cell reselection according to the reselection configuration information.

[0109] Taking the example that the reselection configuration information at least includes reselection target information (such as the frequency of the target cell, or the frequency and physical cell identifier of the target cell), the UE can measure the target cell according to the reselection target information to perform cell reselection. That is, when the reselection target information exists, the UE can only perform measurement according to the reselection target information, that is, it can ignore the reselection priority configuration information. If the UE measures the target cell indicated by the reselection target information, or the UE measures the target cell indicated by the reselection target information and the quality of the target cell meets the first quality condition, the UE performs cell reselection to the target cell. If the UE cannot measure the target cell indicated by the reselection target information, or the UE measures the target cell indicated by the reselection target information but the quality of the target cell does not meet the first quality condition, the UE will not be able to perform cell reselection to the target cell. In this case, the UE can perform cell reselection according to the reselection priority configuration information. That is, in this case, the UE performs measurement according to the normal process or rules to perform cell reselection.

[0110] In an embodiment of the present application, the quality of a cell (such as the target cell mentioned above) includes at least one of received signal code power (RSCP), reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), signal-to-noise ratio (SNR), signal to interference plus noise ratio (SINR), reference signal strength indication (RSSI) or other signal qualities. The quality of a cell can be at the cell level, beam level, synchronization signal / physical broadcast channel block level, numerology level, slicing level, or bandwidth part (BWP) level. The downlink signal quality may be obtained by measuring at least one of a downlink synchronization channel, a channel-state information reference signal (CSI) reference signal (CSI-RS), a demodulation reference signal (DMRS), a cell-specific reference signal (CRS), a synchronization signal (SS), a synchronization signal / physical broadcast channel block (SS / PBCH Block), or other downlink signals. Corresponding to the quality of the cell, the cell quality reference threshold may include at least one of an RSCP threshold, an RSRP threshold, an RSRQ threshold, an SNR threshold, an SINR threshold, an RSSI threshold, or other quality thresholds.

[0111] A beam can be understood as a spatial resource, and can refer to a transmit or receive precoding vector with energy transmission directionality. In addition, the transmit or receive precoding vector can be identified by index information, and the index information can correspond to the resource identifier (identity, ID) of the configured terminal. For example, the index information can correspond to the identifier or resource of the configured CSI-RS; it can also be the identifier or resource of the corresponding configured SSB; it can also be the identifier or resource of the corresponding configured uplink sounding reference signal (SRS). Optionally, the index information can also be index information explicitly or implicitly carried by the signal or channel carried by the beam. The energy transmission directionality can refer to the precoding processing of the signal to be transmitted by the precoding vector, the signal after the precoding processing has a certain spatial directionality, and the signal received after the precoding processing by the precoding vector has better receiving power, such as meeting the receiving demodulation signal-to-noise ratio; the energy transmission directionality can also refer to the different receiving powers of the same signal sent from different spatial positions received by the precoding vector.

[0112] Alternatively, the reselection target information may also be used to indicate that the target cell has the highest priority, the highest quality ranking, or the best quality. In one possible implementation, when the UE measures the target cell, the UE reselects to the target cell; or, when the UE determines that the quality of the target cell is the best, the UE reselects to the target cell. In other words, based on the reselection target information, the UE determines that the target cell should be reselected first, and therefore, when the target cell is measured, reselects to the target cell.

[0113] It can be understood that in the embodiment of the present application, the cell with the “best quality” can be the cell with the largest ranking value or the highest ranking among the candidate cells, or can be the cell with the largest number of good beams (such as beams with a beam quality exceeding a certain threshold) among the second cells. The second cells include the cell with the largest ranking value, and the cell whose ranking value is within a certain range (such as x dB, where x is configurable) from the maximum ranking value. The ranking value can be understood as a quality result determined based on the measured quality of the cell.

[0114] Taking the example where the reselection configuration information at least includes the reselection time range information, the UE can start the timer based on the reselection time range information. For example, if the reselection time range information includes the time length, the UE can start the timer after receiving the reselection configuration information, or start the timer when the reselection trigger time arrives. Therefore, the effective time range of the timer is: from the timer start time to the timer start time + the time length. For another example, if the reselection time range information includes the start time information and the end time information, the UE starts the timer at the time indicated by the start time information and stops the timer at the time indicated by the end time information. Therefore, the effective time range of the timer is: from the start time information to the end time information.

[0115] For example, if the reselection configuration information includes at least reselection triggering time information, when the time indicated by the reselection triggering time information arrives, the UE immediately performs measurement to perform the cell reselection process.

[0116] For example, the reselection configuration information includes at least reselection trigger time information and reselection time range information. The reselection time range information indicates a time length. When the time indicated by the reselection trigger time information arrives, the UE starts a timer and sets the time length of the timer to the time length indicated by the reselection time range information. When the timer starts, the UE immediately performs measurements for cell reselection. When the timer stops, the UE may determine whether to perform measurements for cell reselection based on the quality of the serving cell.

[0117] As an implementation method, during the timer running time, the UE may perform cell reselection according to the reselection configuration information. During the timer running time, if the UE reselects to other cells, the UE may stop the timer. If the timer expires and the UE does not reselect to other cells, optionally, the UE may perform cell reselection according to the reselection priority configuration information described above. At this time, optionally, the UE may delete the above reselection configuration information. As another implementation method, if the reselection configuration information includes reselection target information, the UE may perform measurements according to the reselection target information in priority during the timer running time. If the UE reselects to the target cell indicated by the reselection target information, the UE stops the timer; if the UE cannot reselect to the above target cell during the timer running time, the UE may perform measurements according to the reselection priority configuration information described above. As another implementation method, during the timer running time, the UE performs cell reselection according to both the reselection target information and the reselection priority configuration information described above. For example, when the UE measures multiple candidate cells for reselection, if the target cell indicated by the reselection target information is included, the UE reselects to the target cell; or the UE believes that the quality of the target cell is the best, so the UE reselects to the target cell; or the UE reselects to the cell with the best quality. As another implementation method, during the timer running time, the UE only performs measurements based on the target cell indicated by the reselection target information. If the UE cannot reselect the target cell during the timer running time, the UE can perform measurements according to the reselection priority configuration information described above after the timer expires. As another implementation method, if the reselection configuration information does not include the reselection target information, the UE can perform measurements according to the reselection priority configuration information described above during the timer running time to perform cell reselection, that is, regardless of whether the quality of the UE's serving cell meets the reselection conditions, the UE performs measurements according to the reselection priority configuration information described above during the timer running time.

[0118] As an implementation manner, when the UE performs cell reselection to another cell, the UE may discard the above reselection configuration information.

[0119] As a specific implementation, the reselection configuration information includes reselection trigger time information, reselection target information and reselection time range information, and the network device is a network device on a satellite in a transparent forwarding form. Figure 2A At a certain moment before time T2, base station 2 determines that the reselection configuration information includes:

[0120] Reselection trigger time information: T2;

[0121] Reselection target information: the frequency of cell 3 and the PCI of cell 3;

[0122] Reselect time range information: time period information, taking the length of the time period from T2 to T3 as an example.

[0123] Base station 2 sends the reselection configuration information to the UEs (including UE1 and UE2) in cell 2. For example, base station 2 can send the reselection configuration information to the UEs via network equipment on satellite 2 connected to it. UE1 and UE2 perform operations related to cell reselection based on the reselection configuration information.

[0124] For example, network equipment or base station 2 on satellite 2 sends the above reselection configuration information to UE at any time before time T2. For example, when time T2 arrives, UE1 and UE2 measure the quality of cell 3 based solely on the reselection target information within the time range from T2 to T3, and the quality of cell 3 meets the first criterion. UE1 and UE2 then reselect to cell 3.

[0125] For another example, due to signal obstruction or other reasons, UE1 does not measure the quality of cell 3 in the time period from T2 to T3, then UE1 can perform measurements according to the reselection priority configuration information in the time period from T2 to T3, and can also perform measurements according to the reselection priority configuration information outside the time period from T2 to T3. In one possible implementation, UE1 performing measurements according to the reselection priority configuration information can be to determine the target cell for reselection according to the cell reselection mechanism in the prior art (for example, refer to the relevant description in 3GPP TS38.304 v15.4.0). For example, if UE1 measures multiple cells that meet the quality conditions, UE1 can perform cell reselection according to the frequency priority, such as trying to reselect to the cell with the best quality among the cells with the highest frequency priority. The frequency priority here is an example of reselection priority configuration information.

[0126] Based on the above embodiments, reselection configuration information including reselection trigger information is introduced. Based on this reselection configuration information, a method for implementing cell reselection for a UE in a cell hopping scenario is provided, which helps prevent situations where the UE cannot communicate normally. Furthermore, when the reselection configuration information includes reselection target information, unnecessary reselection measurements can be reduced, saving UE energy consumption. When the reselection configuration information includes reselection time range information, the number of reselection measurements can be reduced, further saving UE energy consumption.

[0127] like Figure 4As shown, an embodiment of the present application provides another cell reselection method. This method can be applied to a scenario where a hop is triggered, or to a scenario after a hop occurs. On the UE side, the method can be performed by the UE, or a component for the UE (such as a chip or circuit, etc.). On the network side, the method can be performed by a network device (which can be a RAN device, a DU, or a CU), or a component for a network device (such as a chip or circuit, etc.). For ease of explanation, the following description takes the UE and the network device performing the method as an example.

[0128] The method comprises the following steps:

[0129] Step 401: The network device sends reselection configuration information and non-reselection configuration information to the UE.

[0130] Accordingly, the UE may receive the reselection configuration information and the non-reselection configuration information.

[0131] The reselection configuration information includes at least one of reselection trigger information, reselection target information, and reselection time range information. Figure 3 Related description of the corresponding embodiment: When the network device is deployed on a satellite, taking transparent forwarding as an example, the network device may receive the reselection configuration information from the base station of the TN and forward it to the UE.

[0132] It is understandable that the reselection configuration information and the non-reselection configuration information can be carried in the same message or in different messages. Optionally, the reselection configuration information and the non-reselection configuration information can be carried in any of system messages, paging messages, multicast messages, unicast messages, short messages, and downlink control messages.

[0133] The specific implementation of reselecting configuration information can be referred to Figure 3 The description of the corresponding embodiments will not be repeated here.

[0134] The non-reselection configuration information includes at least one of non-reselection condition information and non-reselection area information. Optionally, the non-reselection configuration information may also include non-reselection time range information. It is understood that the non-reselection configuration information may also be referred to as reselection configuration deactivation information.

[0135] If the UE determines that it meets the non-reselection configuration information, the UE may not perform measurement according to the reselection configuration information. For example, the UE may continue to reside in the current serving cell, that is, the serving cell remains unchanged.

[0136] Alternatively, if the reselection configuration information includes reselection target information and the non-reselection configuration information is satisfied, the UE may not perform measurements based on the reselection target information. Alternatively, the UE may perform measurements based on the reselection priority configuration information described above to perform cell reselection.

[0137] The non-reselection condition information is used to instruct the UE not to perform measurements based on the reselection configuration information when the non-reselection condition information is met. The non-reselection condition information may include information about the measurement target cell, or information about the measurement target cell and a quality threshold. The measurement target cell information may include a frequency, a frequency and a physical cell identifier, or a CGI. It will be understood that when the non-reselection condition information includes information about the measurement target cell, "UE performing measurements" may at least include "UE performing measurements based on the measurement target cell information."

[0138] The non-reselection area information is used to indicate an area where the UE determines that it does not need to perform measurements according to the reselection configuration information. The non-reselection area information may include a longitude and / or latitude range, or other area range information.

[0139] The non-reselection time range information is used to indicate the time range in which the UE determines that it does not need to perform measurements according to the reselection configuration information. That is, within the time range indicated by the non-reselection time range information, the UE does not perform measurements according to the reselection configuration information. The non-reselection time range information may include the latest time information for not performing measurements according to the reselection configuration information, or the deadline information for not performing measurements according to the reselection configuration information. The latest time information for not performing measurements according to the reselection configuration information or the deadline information for not performing measurements according to the reselection configuration information may be the reselection trigger time information, or a moment after the reselection trigger time information. Alternatively, the latest time determined by the non-reselection time range information is the end time determined by the reselection time range information, or a moment after the end time determined by the reselection time range information. Alternatively, as another possible implementation method, the non-reselection time range information is Figure 3 The reselection time range information in the corresponding embodiment. Figure 3 As a possible implementation, the non-reselection time range information may be predefined as the reselection triggering time information, that is, the time range indicated by the non-reselection time range information is the same as the time range indicated by the reselection triggering time information.

[0140] Step 402: The UE determines, based on the non-reselection configuration information, whether to perform measurement according to the reselection configuration information for cell reselection.

[0141] As an implementation method, the non-reselection configuration information includes at least the information of the measurement target cell, or the information of the measurement target cell and the quality threshold. The network device can determine the information of the measurement target cell in the non-reselection condition information based on the satellite's trajectory and the information of the adjacent cells. Optionally, the quality threshold can also be predefined, that is, the reselection configuration information can not carry the quality threshold. As an example, refer to Figure 2A The network device sends non-reselection condition information to the UE in cell 2 of satellite 2, including the frequency and PCI of cell 1. If the UE determines that it can measure cell 1, it does not perform measurements based on the reselection configuration information. For example, if UE1 can measure cell 1 before the cell hop, it does not perform measurements based on the reselection configuration information after the cell hop. This means that UE1 remains in cell 2, and its serving cell remains cell 2. Alternatively, if the quality of cell 1 measured by the UE exceeds the quality threshold, the UE does not perform reselection.

[0142] As another possible implementation, the non-reselection configuration information includes at least non-reselection area information. If the UE can determine that it is in the non-reselection area, the UE does not perform measurements according to the reselection configuration information. The UE can determine that it is in the non-reselection area based on the location information determined by its positioning capability, or it can determine that it is in the non-reselection area based on the location information received from the network device. As an example, refer to Figure 2A The longitude and / or latitude range indicated by the non-reselection area information sent by the network device to the UE of cell 2 of satellite 2 includes Figure 2A The UE1 determines that it is in the overlapping coverage area A, and then determines not to perform measurement according to the reselection configuration information after the cell hopping occurs.

[0143] As another possible implementation, assuming that the no-reselection configuration information includes at least no-reselection time range information, the UE can start a timer based on the no-reselection time range information. For example, if the no-reselection time range information includes a time length, the UE can start the timer after receiving the no-reselection configuration information. Therefore, the effective time range of the timer is from the timer start time to the timer start time + the time length. For another example, if the no-reselection time range information includes start time information and end time information, the UE can start the timer at the time indicated by the start time information and stop the timer at the time indicated by the end time information. Therefore, the effective time range of the timer is from the start time information to the end time information. For another example, if the no-reselection time range information includes a deadline for not performing measurements based on the reselection configuration information, the UE can start the timer after receiving the no-reselection configuration information. Therefore, the effective time range of the timer is from the timer start time to the time indicated by the deadline for not performing measurements based on the reselection configuration information. During the timer's running time, the UE may not perform measurements based on the reselection configuration information. Optionally, during the timer's running time, the UE may not perform measurements. It should be understood that "measurements" here refer to measurements other than measurements of the cell. Alternatively, during the timer running time, the UE simply does not perform measurement according to the reselection configuration information. Optionally, the UE may perform measurement according to the reselection priority configuration information described above to perform cell reselection.

[0144] As a specific embodiment, the terminal device receives the reselection configuration information and the non-reselection configuration information sent by the network device as an example, and the network device is a satellite in the form of base station transparent forwarding as an example for description. Figure 2A At a certain moment before time T2, base station 2 determines not to reselect configuration information and reselect configuration information.

[0145] The non-reselection configuration information includes:

[0146] 1) Measurement target cell information: the frequency of cell 1 and the PCI of cell 1;

[0147] 2) Quality threshold: Q1;

[0148] 3) Do not reselect time range information: the deadline information is T3.

[0149] The reselection configuration information includes:

[0150] 1) Reselection trigger time information: T2;

[0151] 2) Reselection target information: the frequency of cell 3 and the PCI of cell 3;

[0152] 3) Reselect time range information: T2 to T3.

[0153] Base station 2 sends the reselection configuration information and the non-reselection configuration information to the UEs (including UE1 and UE2) in cell 2. For example, base station 2 can send the reselection configuration information and the non-reselection configuration information to the UEs via a network device on satellite 2 connected thereto. For example, the network device on satellite 2 or base station 2 can send the reselection configuration information and the non-reselection configuration information to the UEs at any time before time T2.

[0154] UE1 and UE2 first determine whether to perform cell reselection according to the above non-reselection configuration information.

[0155] For example, based on the aforementioned non-reselection configuration information, UE1 determines that it can measure the frequency of cell 1 and the PCI of cell 1, and that the quality of cell 1 is greater than the quality threshold (Q1). UE1 then determines that it meets the conditions for the non-reselection configuration information, i.e., it does not need to perform measurements based on the reselection configuration information after T2. Therefore, when time T2 arrives, UE1 remains in cell 2. Although the satellite it is connected to changes from satellite 2 to satellite 1, from the UE's perspective, UE1 still resides in cell 2. Therefore, for this UE1, the cell reselection operation in step 403 will not be performed before time T3, or within the time range from T2 to T3. Alternatively, UE1 may perform measurements based on the reselection priority configuration information described above before T3.

[0156] Step 403: The UE performs measurement for cell reselection according to the reselection configuration information.

[0157] This step is optional.

[0158] For a certain UE, when the above step 402 determines that the UE does not meet the non-reselection configuration information, step 403 is executed.

[0159] The implementation method of the UE performing measurement to perform cell reselection according to the reselection configuration information can refer to the aforementioned Figure 3 The description of step 302 of the corresponding embodiment will not be repeated here.

[0160] Optionally, as another implementation method, for a certain UE, when the above step 402 determines that the UE does not meet the non-reselection configuration information, the UE may also perform measurements according to the reselection configuration information and the reselection priority configuration information to perform cell reselection.

[0161] Based on the above embodiments, by introducing the non-reselection configuration information, unnecessary cell reselection for some UEs is avoided, thereby saving UE energy consumption. Furthermore, by introducing the reselection configuration information, UEs in satellite scenarios can perform cell reselection, reducing unnecessary reselection measurements and further saving UE energy consumption.

[0162] like Figure 5 As shown, an embodiment of the present application provides another cell / area reselection method. This method can be applied to a scenario where a hop is triggered, or to a scenario after a hop occurs. On the UE side, the method can be executed by the UE, or a component for the UE (such as a chip or circuit, etc.). On the network side, the method can be executed by a network device (which can be a RAN device, a DU, or a CU), or a component for a network device (such as a chip or circuit, etc.). For ease of explanation, the following takes the UE and the network device executing this method as an example.

[0163] The method comprises the following steps:

[0164] Step 501: The network device sends non-reselection configuration information to the UE.

[0165] Accordingly, the UE may receive non-reselection configuration information.

[0166] Step 502: The UE determines whether to perform measurement for cell reselection according to the non-reselection configuration information.

[0167] When the UE meets the non-reselection configuration information, the UE determines not to perform measurement for cell reselection.

[0168] When the UE does not meet the non-reselection configuration information, the UE determines to perform measurements for cell reselection. Optionally, measurements can be performed according to the reselection priority configuration information for cell reselection. For the specific implementation method of the UE performing measurements for cell reselection according to the reselection priority configuration information, please refer to Figure 4 The relevant description of the corresponding embodiments will not be repeated here.

[0169] It should be noted that Figure 4 For various different implementations of the non-reselection configuration information carrying content in the corresponding embodiment, please refer to Figure 4 The corresponding implementation of not reselecting the configuration information in the corresponding embodiment will not be described in detail here. Figure 5 The non-reselection configuration information in the corresponding embodiment can be Figure 4 The non-reselection configuration information in the corresponding embodiment is the same, so Figure 5 In the corresponding embodiment, various different implementation methods for determining whether the non-reselection configuration information is satisfied can be referred to. Figure 4 The corresponding description of the corresponding embodiment.

[0170] Figure 4 The corresponding embodiments and Figure 5 The main differences between the corresponding embodiments are: Figure 4In the corresponding embodiment, when the UE satisfies the non-reselection configuration information, the UE determines not to perform measurements for cell reselection according to the reselection configuration information, but may perform measurements for cell reselection according to the reselection priority configuration information or not perform reselection. When the UE does not satisfy the non-reselection configuration information, the UE determines to perform measurements for cell reselection according to the reselection configuration information, or to perform measurements for cell reselection according to the reselection configuration information and the reselection priority configuration information. Figure 5 In a corresponding embodiment, when the UE satisfies the non-reselection configuration information, the UE determines not to perform measurements for cell reselection. When the UE does not satisfy the non-reselection configuration information, the UE determines to perform measurements for cell reselection, for example, performing measurements for cell reselection based on the reselection priority configuration information. Based on the above embodiment, by introducing the non-reselection configuration information, unnecessary cell reselection for some UEs is avoided, thereby saving UE energy consumption. Optionally, by introducing the reselection priority configuration information, UEs in satellite scenarios can perform cell reselection, reducing unnecessary reselection measurements and further saving UE energy consumption.

[0171] like Figure 6 As shown, an embodiment of the present application provides another cell reselection method. This method can be applied to a scenario before cell hopping occurs. On the UE side, the method can be performed by the UE, or a component for the UE (such as a chip or circuit, etc.). On the network side, the method can be performed by a network device (which can be a RAN device, a DU, or a CU), or a component for the network device (such as a chip or circuit, etc.). For ease of explanation, the following description takes the UE and the network device performing this method as an example.

[0172] The method comprises the following steps:

[0173] Step 601: The network device sends cell reselection indication information to the UE.

[0174] Correspondingly, the UE may receive the cell reselection indication information.

[0175] The cell reselection indication information is used to instruct the UE to immediately reselect a cell, or to instruct the UE to immediately perform measurements for cell reselection, or to instruct the UE to set the priority of the frequency of the current serving cell to the lowest, or to instruct the UE to set the priority of the current serving cell to the lowest, or to indicate that the current serving cell of the UE will hop, or to indicate that the current serving cell is a hopping cell.

[0176] For example, one implementation method for a UE to determine whether a cell is a "hopping cell" is that when the network device sends cell reselection indication information to the UE, it indicates that the cell is a "hopping cell"; when the network device does not send cell reselection indication information to the UE, the cell is a "non-hopping cell." Alternatively, the network device sends cell reselection indication information to the UE, and different values of the cell reselection indication information indicate that the cell is a "hopping cell" or a "non-hopping cell."

[0177] The cell reselection indication information may be carried via a multicast message, a unicast message, a downlink control message, a short message, a paging message, or a system message.

[0178] In step 602, the UE determines to reselect and camp on a target cell, where the target cell is a non-hopping cell among candidate cells whose measured cell quality meets a first criterion, and the target cell is a suitable cell.

[0179] The method for the UE to determine whether a cell is a hopping cell may be, for example, that the UE reads a system message sent by the cell. If the system message sent by the cell carries cell reselection indication information (or the carried cell reselection indication information indicates that the cell is a hopping cell), it indicates that the cell is a hopping cell. The implementation and function of the cell reselection indication information are similar to those of the cell reselection indication information in step 601 above, and are not further described.

[0180] Among them, the method for the UE to determine whether a certain cell is a suitable cell may be, for example: the UE determines whether a certain cell is a suitable cell based on whether the UE is a subscriber of the network identifier to which the cell belongs and whether the status of the cell is "access restricted" or "access prohibited". As a possible implementation method, first, the UE determines that the UE is a subscriber of the network identifier to which the cell belongs based on a system message sent by the cell; secondly, if the UE determines that the status of the cell is not "access restricted" or "access prohibited" based on the system message sent by the cell, the UE may determine that the cell is a suitable cell; if the UE determines that the status of the cell is "access restricted" or "access prohibited" based on the system message sent by the cell, the UE may determine that the cell is not a suitable cell.

[0181] As an example, an implementation manner in which the UE determines the target cell from the candidate cells in the above step 602 is given below, including part or all of the following steps A to C.

[0182] In step A, the UE determines a first cell among candidate cells whose cell quality meets a first criterion.

[0183] The first cell refers to the cell with the best quality among the candidate cells. The "best quality" cell can be the cell with the highest ranking value among the candidate cells, or can also be the cell with the largest number of good beams (e.g., beams with a beam quality exceeding a certain threshold) among the second cells. The second cells include the cell with the highest ranking value among the candidate cells, and the cell whose ranking value differs from the highest ranking value by a certain range (e.g., x dB, where x is configurable).

[0184] Optionally, the candidate cells do not include the current serving cell of the UE.

[0185] Optionally, if the candidate cells include the current serving cell, the UE sets the priority of the current serving cell to the lowest according to the cell reselection indication information, or it can be understood that the ranking value of the current serving cell is ranked last.

[0186] In step B, the UE attempts to reselect the first cell.

[0187] The UE attempts to reselect the first cell, which can be understood as attempting to reselect to the first cell, but the result of the reselection may be success or failure.

[0188] The UE performs a process of reselecting the first cell, for example, which may be:

[0189] 1) If the first cell is not a hopping cell or is not a suitable cell, it is determined that the first cell will not be reselected, that is, the reselection fails, and the process goes to step C.

[0190] 2) If the first cell is a non-hopping cell and is a suitable cell, the UE can reselect and camp on the first cell, i.e., the reselection is successful and the process ends. At this point, the first cell can be called the target cell.

[0191] In step C, the UE sets the ranking of the first cell to the lowest, or sets the priority of the first cell to the lowest.

[0192] That is, in step C, the first cell that was originally ranked first in the candidate cell ranking is moved to the last position in the ranking.

[0193] As another implementation method, in step C, the UE may also move the first cell that was originally ranked at the top of the candidate cell ranking to the middle position of the ranking, that is, to a position between the first and the last cell.

[0194] After step C, the ranking of the cells in the candidate cells changes, and then the process goes to step A. That is, the process continues to select the first cell based on the latest ranking result until a cell in the candidate cells is successfully reselected, or all cells in the candidate cells cannot be reselected successfully.

[0195] Optionally, if all cells among the candidate cells cannot be reselected successfully, the UE may camp on the current serving cell.

[0196] As an implementation method, in the above step C, the UE can exclude the current first cell among the candidate cells, or the current first cell among the candidate cells and other cells (which can be called third cells) that are at the same frequency as the current first cell from the candidate cells. Alternatively, the UE can exclude the current first cell among the candidate cells, or the current first cell and the third cell among the candidate cells from the candidate cells for a period of time (for example, a maximum of 300 seconds), that is, within this time period, the current first cell, or the current first cell and the third cell do not participate in the selection of the first cell in the subsequent steps, that is, within this time period, the UE does not select the current first cell, or any of the current first cell and the third cell, as the first cell in the next round of selection.

[0197] The following describes this with two examples.

[0198] Example 1

[0199] Combine Figure 2A As an example, at any time before time T2, UE1 receives a cell reselection indication message from the serving cell (i.e., cell 2) via satellite 2. Based on this cell reselection indication message, UE1 determines that cell 2 will transition, triggering UE1 to execute the cell reselection process. For example, if UE1 measures cell 1 and cell 2, UE1 ranks them and sets cell 2's ranking to the lowest, resulting in the ranking result: cell 1 > cell 2.

[0200] UE1 then reads the system message sent by cell 1 (cell 1 can be called the first cell in this case). Since cell 1 is a hopping cell, the system message carries cell reselection indication information. UE1 determines that cell 1 is a hopping cell by reading the system message from cell 1. Therefore, UE1 determines that it is camping on the current serving cell, cell 2. Specifically, if the UE determines that all measured cells (cell 1 and cell 2) are hopping cells, the UE determines that it is camping on the current serving cell.

[0201] Example 2

[0202] Combine Figure 2B As another example, at any time before time T2, UE1 receives a cell reselection indication message from the serving cell (i.e., cell 2) via satellite 2. Based on this cell reselection indication message, UE1 determines that cell 2 will transition, triggering UE1 to execute the cell reselection process. For example, if UE1 measures cells 1, 2, and 5, UE1 ranks cells 1, 2, and 5 and sets cell 2 to the lowest ranking. For example, the resulting ranking is: cell 1 > cell 5 > cell 2.

[0203] UE1 then reads the system message sent by cell 1 (cell 1 can be called the first cell at this time). Assuming that cell 1 is a hopping cell, the system message carries cell reselection indication information. UE1 determines that cell 1 is a hopping cell by reading the system message of cell 1. At this point, regardless of whether cell 1 is a suitable cell, UE1 will set cell 1's ranking to the lowest. Alternatively, since cell 1 is a hopping cell, there is no need to confirm whether cell 1 is a suitable cell. UE1 will set cell 1's ranking to the lowest, resulting in the new ranking result being: cell 5 > cell 2 > cell 1.

[0204] Then, UE1 reads the system message of cell 5 (cell 5 can be called the first cell at this time). For example, the system message of cell 5 does not carry cell reselection indication information (that is, cell 5 is a non-hopping cell), and the status of cell 5 is not "access restricted" or "access prohibited" (that is, cell 5 is a suitable cell), so UE1 determines to stay in cell 5.

[0205] Based on the above embodiment, before cell hopping occurs, the network device instructs the UE to reselect to another non-hopping cell or stay in the current serving cell, which helps to avoid the impact of cell hopping on the UE's services, ensures the UE's service experience, and helps avoid unnecessary reselection and the resulting increase in UE energy consumption.

[0206] It should be noted that the present embodiment is described using the NTN system as an example, and the present embodiment can also be applied to the TN system, which is not limited in the present embodiment.

[0207] It is understood that in the embodiments of the present application, the terminal device and / or the network device may perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, the various steps may be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all of the operations in the embodiments of the present application need to be performed.

[0208] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0209] It should be noted that the above Figure 3 The corresponding embodiments to Figure 6 The corresponding embodiments can be implemented in combination with each other. For example, you can first execute Figure 6 In the corresponding embodiment, if the UE executes Figure 6 The corresponding embodiment does not complete the cell reselection, that is, the cells measured by the UE are all hopping cells, so the UE stays in the current serving cell. Figure 3 The corresponding embodiment, or Figure 4 The corresponding embodiment, or Figure 5 In the corresponding embodiment, the UE then determines whether to attempt to perform cell measurement for cell reselection. For example, the UE may first perform Figure 4 The corresponding embodiment, or Figure 5 In the corresponding embodiment, if Figure 4 or Figure 5 In the corresponding embodiment, the UE performs measurement according to the reselection priority configuration information, which can be combined with Figure 6 The corresponding embodiment is implemented, that is, the UE performs measurement according to the reselection priority configuration information, and if there is a target cell (ie, a non-hopping cell with the best quality) among the measured candidate cells, it attempts to reselect to the target cell.

[0210] It should be noted that in the embodiments of the present application, when the network device includes a CU and a DU, the CU may send any information in any of the above embodiments to the DU. For example, taking the example of sending non-reselection configuration information and / or reselection configuration information and / or cell reselection indication information via system messages, the CU sends at least one of the above information to the DU, which then sends it to the terminal device via the DU.

[0211] Alternatively, when the network device includes a CU and a DU, the DU may send non-reselection configuration information and / or reselection configuration information and / or cell reselection indication information and / or hopping indication information to the CU, and the hopping indication information is used by the CU to determine that the cell under the DU will hop. Optionally, the DU may also send information about the cell under the DU to the CU. The cell information here may include at least one of a cell identifier, a cell frequency, a physical cell identifier, and a cell global identifier. For example, any of the above information may be sent through at least one of an interface establishment request message, an interface establishment response message, a configuration update message, and a configuration update confirmation message. Taking the example of the DU sending at least one of non-reselection configuration information, reselection configuration information, and cell reselection indication information to the CU, the CU may encode the system message or system message block based on the above information received from the DU, or the CU may determine the switching target based on the above information received from the DU, so that the CU can switch the UE to other network devices in a timely manner. Optionally, when the CU switches the UE to other network devices, it may also indicate that the switching reason is "satellite movement" or "cell hopping". Taking the example of DU sending hopping indication information and information of the first cell under DU to CU, CU can determine that the first cell will hop, so CU will configure the UE under the first cell to perform measurement or switching to ensure the service experience of the UE under the first cell.

[0212] Optionally, the network device in any of the above embodiments (hereinafter referred to as the first network device) may also send non-reselection configuration information and / or reselection configuration information and / or cell reselection indication information and / or hopping indication information to other network devices (hereinafter referred to as the second network device) (directly (through the interface between the base station and the base station, such as the X2, Xn interface) or indirectly (through the interface between the base station and the core network device, such as the S1 or NG interface). Optionally, the first network device may also send information about the first cell under the first network device to the second network device. For example, the above information may be sent through at least one of the following messages: X2 / Xn interface establishment request message, X2 / Xn interface establishment response message, node configuration update message, node configuration update confirmation message, handover request (handover request or handover required) message, handover request confirmation message, handover command message. Through the above interaction mechanism, the second network device can determine that the first cell under the first network device will hop, so that the second network device can determine whether to avoid the UE under the second network device from reselecting or switching to the first network device.

[0213] It is understandable that in the embodiment of the present application, the terminal device and / or the network device can perform some or all of the steps in the embodiment of the present application, and these steps or operations are only examples. The embodiment of the present application can also perform other operations or variations of various operations. In addition, each step can be performed in the different orders presented in the embodiment of the present application, and it is possible not to perform all the operations in the embodiment of the present application. In each embodiment of the present application, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment according to their inherent logical relationship.

[0214] It can be understood that in the above method embodiments, the method implemented by the terminal device can also be implemented by components that can be used for the terminal device (such as chips or circuits), and the method implemented by the network device can also be implemented by components that can be used for the network device (such as chips or circuits). The embodiments of the present application do not limit this.

[0215] Figure 7 The following is a possible exemplary block diagram of a communication device involved in an embodiment of the present application. The communication device 700 can exist in the form of software or hardware. The communication device 700 may include a receiving unit 710 and a reselection unit 720. The receiving unit 710 is configured to support communication between the communication device 700 and other network entities or other modules in the communication device 700. Optionally, the communication device 700 may also include a storage unit, which may be configured to store instructions and / or data. The reselection unit 720 may read the instructions and / or data in the storage unit to enable the communication device 700 to implement the corresponding method.

[0216] In one possible manner, when the reselection unit 720 is integrated into a processing unit, the processing unit may be a processor or a controller, such as a general-purpose central processing unit (CPU), a general-purpose processor, a digital signal processing (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It may implement or execute the various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the embodiments of the present application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The receiving unit 710 may be a communication interface, a receiver or a receiving circuit, etc., wherein the communication interface is a general term, and in a specific implementation, the communication interface may include at least one interface.

[0217] The communication device 700 may be used to perform Figure 3 and / or Figure 4 and / or Figure 5 and / or Figure 6 The terminal device of the corresponding embodiment can also be used to execute Figure 3 and / or Figure 4 and / or Figure 5 and / or Figure 6 The chip corresponding to the steps of the terminal device in the corresponding embodiment. For example, when the reselection unit 720 is integrated into a processing unit, the processing unit may be, for example, a processor, and the receiving unit 710 may be, for example, a receiver including a radio frequency circuit. For another example, when the reselection unit 720 is integrated into a processing unit, the processing unit may be, for example, a processor, and the receiving unit 710 may be, for example, an input interface, a pin, or a circuit.

[0218] In one embodiment:

[0219] The receiving unit 710 is used to receive reselection configuration information from a network device, where the reselection configuration information includes reselection trigger information, where the reselection trigger information is used to trigger the execution of measurements for cell reselection, and the reselection trigger information includes reselection time information or reselection trigger indication information; the reselection unit 720 is used to perform measurements for cell reselection based on the reselection configuration information.

[0220] In some possible implementation methods, the reselection trigger information includes reselection trigger time information; the reselection unit 720 is specifically configured to start performing measurements to perform cell reselection when the time indicated by the reselection trigger time information arrives.

[0221] In some possible implementation methods, the reselection trigger information includes reselection trigger indication information; the reselection unit 720 is specifically configured to start performing measurements to perform cell reselection when the reselection trigger indication information is acquired.

[0222] In some possible implementation methods, the reselection configuration information also includes reselection target information, and the reselection target information is used to indicate information of a target cell for reselection measurement; the reselection unit 720 is specifically used to determine to perform measurement based on the reselection trigger information; if the target cell is measured and the target cell meets the first criterion, the target cell is reselected.

[0223] In some possible implementation methods, the reselection configuration information also includes reselection time range information; the reselection unit 720 is used to reselect the target cell if the target cell is measured and the target cell meets the first criterion, including: if the target cell is measured within the time range indicated by the reselection time range information and the target cell meets the first criterion, reselecting the target cell.

[0224] In yet another embodiment:

[0225] The receiving unit 710 is configured to receive non-reselection configuration information and reselection configuration information from a network device; the reselection unit 720 is configured to determine, based on the non-reselection configuration information, whether to perform measurement based on the reselection configuration information to perform cell reselection.

[0226] In some possible implementation methods, the non-reselection configuration information includes non-reselection condition information, and the non-reselection condition information includes information of the measurement target cell; the reselection unit 720 is specifically used to determine not to perform measurement according to the reselection configuration information to perform cell reselection if the measurement target cell is measured.

[0227] In some possible implementation methods, the non-reselection condition information also includes a quality threshold; the reselection unit 720 is specifically configured to determine not to perform measurement according to the reselection configuration information for cell reselection if the measurement target cell is measured and the quality of the measurement target cell is higher than the quality threshold.

[0228] In some possible implementation methods, the non-reselection configuration information includes non-reselection area information; the reselection unit 720 is specifically used to determine not to perform measurements according to the reselection configuration information for cell reselection if the terminal device is located in the area indicated by the non-reselection area information.

[0229] In some possible implementation methods, the non-reselection configuration information includes non-reselection time range information; the reselection unit 720 is specifically configured to determine not to perform cell measurement for reselection according to the reselection configuration information within the non-reselection time range.

[0230] In some possible implementation methods, the reselecting unit 720 is further configured to not perform measurement for cell reselection after determining not to perform measurement for cell reselection according to the reselection configuration information.

[0231] In some possible implementation methods, the reselection unit 720 is further used to perform measurements for cell reselection based on the reselection priority configuration information of the neighboring cells of the serving cell after determining not to perform measurements for cell reselection based on the reselection configuration information, wherein the reselection priority configuration information includes dedicated reselection priority configuration information and / or public reselection priority configuration information.

[0232] In some possible implementation methods, the reselecting unit 720 is further configured to, after determining to perform measurement according to the reselection configuration information for cell reselection, perform measurement according to the reselection configuration information for cell reselection.

[0233] In some possible implementation methods, the reselection configuration information includes reselection trigger information, where the reselection trigger information is used to trigger measurement to perform cell reselection, and the reselection trigger information includes reselection trigger time information or reselection trigger indication information.

[0234] In some possible implementation methods, the reselection trigger information includes reselection trigger time information; the reselection unit 720 is used to perform measurements for cell reselection based on the reselection configuration information, including: starting to perform measurements for cell reselection when the time indicated by the reselection trigger time information arrives.

[0235] In some possible implementation methods, the reselection trigger information includes reselection trigger indication information; the reselection unit 720 is used to perform measurements for cell reselection based on the reselection configuration information, including: starting to perform measurements for cell reselection at the moment of obtaining the reselection trigger indication information.

[0236] In some possible implementation methods, the reselection configuration information further includes reselection target information, where the reselection target information is used to indicate information of a target cell measured after the reselection is triggered;

[0237] The reselection unit 720 is used to perform measurements for cell reselection according to the reselection configuration information, including: determining to perform measurements according to the reselection trigger information; if the target cell is measured and the target cell meets the first criterion, reselecting to the target cell.

[0238] In some possible implementation methods, the reselection configuration information also includes reselection time range information; the reselection unit 720 is used to reselect the target cell if the target cell is measured and the target cell meets the first criterion, including: if the target cell is measured within the time range indicated by the reselection time range information and the target cell meets the first criterion, reselecting the target cell.

[0239] In yet another embodiment:

[0240] A receiving unit 710 is configured to receive cell reselection indication information of a serving cell from a network device, where the cell reselection indication information is used to indicate that the serving cell is a hopping cell;

[0241] The reselection unit 720 is configured to perform cell measurement according to the cell reselection indication information, and obtain at least one candidate cell that meets the first criterion; determine to reselect and reside in a target cell, where the target cell is a non-hopping cell in the at least one candidate cell, and the target cell is a suitable cell.

[0242] In some possible implementation methods, the cell reselection indication information is carried in a short message, a paging message, or a system message.

[0243] Figure 7 The device shown is a specific beneficial effect of the method for performing cell reselection, which can be referred to above. Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 The relevant descriptions in the method embodiments shown are not repeated here. It is understandable that the units in the embodiments of the present application can also be called modules. The above units or modules can exist independently or be integrated together.

[0244] Figure 8The following is a possible exemplary block diagram of a communication device involved in an embodiment of the present application. The communication device 800 can exist in the form of software or hardware. The communication device 800 may include a determining unit 810 and a sending unit 820. The sending unit 820 is configured to support communication between the communication device 800 and other network entities or other modules in the communication device 800. Optionally, the communication device 800 may also include a storage unit, which may be configured to store instructions and / or data. The determining unit 810 may read the instructions and / or data in the storage unit to enable the communication device 800 to implement the corresponding method.

[0245] In one possible embodiment, when the determination unit 810 is integrated into a processing unit, the processing unit may be a processor or a controller, such as a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It may implement or execute the various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the embodiments of the present application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The sending unit 820 may be a communication interface, a transmitter or a transmitting circuit, etc., wherein the communication interface is a general term. In a specific implementation, the communication interface may include at least one interface.

[0246] The communication device 800 may be used to perform Figure 3 and / or Figure 4 and / or Figure 5 and / or Figure 6 The network device of the corresponding embodiment can also be used to perform Figure 3 and / or Figure 4 and / or Figure 5 and / or Figure 6 The chip corresponding to the steps of the network device in the corresponding embodiment. For example, when the determination unit 810 is integrated into a processing unit, the processing unit may be, for example, a processor, and the sending unit 820 may be, for example, a transmitter including a radio frequency circuit. For another example, when the determination unit 810 is integrated into a processing unit, the processing unit may be, for example, a processor, and the sending unit 820 may be, for example, an output interface, a pin, or a circuit.

[0247] In one embodiment:

[0248] Determining unit 810 is configured to determine reselection configuration information, the reselection configuration information including one or more of reselection trigger information, reselection target information, and reselection time range information. The reselection trigger information is used to trigger the execution of measurements for cell reselection. The reselection trigger information includes reselection trigger time information or reselection trigger indication information. The reselection target information indicates information about a target cell for reselection measurement, and the reselection time range information indicates a time range for measuring the target cell. Transmitting unit 820 is configured to transmit the reselection configuration information to a terminal device, the reselection configuration information being used by the terminal device to execute measurements for cell reselection.

[0249] In some possible implementation methods, the sending unit 820 is also used to send non-reselection configuration information to the terminal device, and the non-reselection configuration information is used by the terminal device to determine whether to perform measurement according to the reselection configuration information to perform cell reselection. The non-reselection configuration information includes one or more of non-reselection condition information, quality threshold, non-reselection area information, and non-reselection time range information. The non-reselection condition information includes information of the measurement target cell.

[0250] Figure 8 For specific beneficial effects of the method for performing cell reselection by the device shown in FIG. Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 The relevant descriptions in the method embodiments shown are not repeated here. It is understandable that the units in the embodiments of the present application can also be called modules. The above units or modules can exist independently or be integrated together.

[0251] refer to Figure 9 , which is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. The terminal device is used to implement the operations of the terminal device in the above embodiment. Figure 9 As shown, the terminal device includes an antenna 910, a radio frequency device 920, and a signal processing unit 930. Antenna 910 is connected to radio frequency device 920. In the downlink direction, radio frequency device 920 receives information sent by network devices via antenna 910 and sends the information to signal processing unit 930 for processing. In the uplink direction, signal processing unit 930 processes the terminal device information and sends it to radio frequency device 920. Radio frequency device 920 then processes the terminal device information and sends it to the network device via antenna 910.

[0252] The signal processing unit 930 is used to process data at various communication protocol layers. While the signal processing unit 930 may be a subsystem of the terminal device, the terminal device may also include other subsystems, such as a central processing subsystem for processing the terminal device's operating system and application layers; or a peripheral subsystem for connecting to other devices. The signal processing unit 930 may be a separate chip. Optionally, the aforementioned devices may be located within the signal processing unit 930.

[0253] The signal processing section 930 may include one or more processing elements 931, for example, a main control CPU and other integrated circuits, as well as an interface circuit 933. Furthermore, the signal processing section 930 may also include a storage element 932. The storage element 932 is used to store data and programs. The program used to execute the method performed by the terminal device in the above method may or may not be stored in the storage element 932. For example, it may be stored in a memory outside of the signal processing section 930. During use, the signal processing section 930 loads the program into a cache for use. The interface circuit 933 is used to communicate with other devices. The above device may be located in the signal processing section 930. The signal processing section 930 may be implemented as a chip including at least one processing element and an interface circuit. The processing element is used to execute each step of any of the methods performed by the terminal device, and the interface circuit is used to communicate with other devices. In one implementation, the unit that implements each step of the above method may be implemented in the form of a processing element scheduler. For example, the device includes a processing element and a storage element, and the processing element calls the program stored in the storage element to execute the method performed by the terminal device in the above method embodiment. The storage element may be a storage element on the same chip as the processing element, ie, an on-chip storage element.

[0254] In another implementation, the program for executing the method executed by the terminal device in the above method can be stored in a memory element on a different chip from the processing element, i.e., an off-chip memory element. In this case, the processing element calls or loads the program from the off-chip memory element to the on-chip memory element to call and execute the method executed by the terminal device in the above method embodiment.

[0255] In another implementation, the unit of the terminal device that implements each step of the above method may be configured as one or more processing elements, which are provided on the signal processing portion 930. The processing elements here may be integrated circuits, such as one or more ASICs, one or more DSPs, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits may be integrated together to form a chip.

[0256] The units implementing the various steps of the above method can be integrated together and implemented in the form of a system-on-a-chip (SOC), and the SOC chip is used to implement the above method. The chip can integrate at least one processing element and a storage element, and the processing element calls the program stored in the storage element to implement the above method executed by the terminal device; or, the chip can integrate at least one integrated circuit to implement the above method executed by the terminal device; or, the above implementation methods can be combined, with the functions of some units being implemented by the processing element calling the program, and the functions of some units being implemented by the integrated circuit.

[0257] As can be seen, the above apparatus may include at least one processing element and an interface circuit, wherein the at least one processing element is configured to execute any of the methods provided in the above method embodiments. The processing element may execute some or all of the steps executed by the terminal device in a first manner, namely, by calling a program stored in a storage element; or in a second manner, namely, by executing some or all of the steps executed by the terminal device through the hardware integrated logic circuit in the processor element in combination with instructions. Of course, the first and second manners may also be combined to execute some or all of the steps executed by the terminal device.

[0258] The processing element herein, as described above, may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as one or more ASICs, one or more microprocessors (DSPs), one or more FPGAs, or a combination of at least two of these integrated circuit forms. The storage element may be a single memory or a collective term for multiple storage elements.

[0259] Figure 9 For the specific beneficial effects of the method for performing cell reselection by the terminal device shown in FIG. Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 The relevant descriptions in the method embodiments shown are not repeated here. It is understandable that the units in the embodiments of the present application can also be called modules. The above units or modules can exist independently or be integrated together.

[0260] refer to Figure 10 , is a schematic diagram of the structure of a network device provided in an embodiment of the present application. The network device is used to implement the operations of the network device in the above embodiment. Figure 10As shown, the network device includes an antenna 1010, a radio frequency device 1020, and a baseband device 1030. Antenna 1010 is connected to radio frequency device 1020. In the uplink direction, radio frequency device 1020 receives information sent by terminal devices via antenna 1010 and sends the information sent by the terminal devices to baseband device 1030 for processing. In the downlink direction, baseband device 1030 processes the information sent by the terminal devices and sends it to radio frequency device 1020. Radio frequency device 1020 then processes the information sent by the terminal devices and sends it to the terminal devices via antenna 1010.

[0261] The baseband device 1030 may include one or more processing elements 1031, such as a main control CPU and other integrated circuits, and an interface 1033. Furthermore, the baseband device 1030 may also include a storage element 1032 for storing programs and data; an interface 1033 for exchanging information with the radio frequency device 1020, such as a common public radio interface (CPRI). The above-mentioned apparatus for a network device may be located in the baseband device 1030. For example, the above-mentioned apparatus for a network device may be a chip on the baseband device 1030, the chip including at least one processing element and an interface circuit, wherein the processing element is used to execute each step of any of the methods performed by the above-mentioned network device, and the interface circuit is used to communicate with other devices. In one implementation, the unit for implementing each step of the above-mentioned method in the network device may be implemented in the form of a processing element scheduler. For example, the apparatus for a network device includes a processing element and a storage element, and the processing element calls a program stored in the storage element to execute the method performed by the network device in the above-mentioned method embodiment. The storage element may be a storage element on the same chip as the processing element, ie, an on-chip storage element, or a storage element on a different chip from the processing element, ie, an off-chip storage element.

[0262] In another implementation, the unit of the network device that implements each step of the above method may be configured as one or more processing elements, which are provided on the baseband device. The processing elements here may be integrated circuits, such as one or more ASICs, one or more DSPs, one or more FPGAs, or a combination of these integrated circuits. These integrated circuits may be integrated together to form a chip.

[0263] The units that implement the various steps of the above method in the network device can be integrated together and implemented in the form of a SOC. For example, the baseband device includes this SOC chip to implement the above method. The chip can integrate at least one processing element and a storage element, and the processing element can call the program stored in the storage element to implement the above method performed by the network device; alternatively, the chip can integrate at least one integrated circuit to implement the above method performed by the network device; or, a combination of the above implementation methods can be used, with the functions of some units implemented by the processing element calling the program, and the functions of some units implemented by the integrated circuit.

[0264] As can be seen, the above-mentioned apparatus for a network device may include at least one processing element and an interface circuit, wherein the at least one processing element is used to execute any of the methods performed by the network device provided in the above method embodiments. The processing element may execute some or all of the steps performed by the network device in a first manner: by calling a program stored in a storage element; or in a second manner: by executing some or all of the steps performed by the network device through the hardware integrated logic circuit in the processor element in combination with instructions. Of course, the first and second manners may also be combined to execute some or all of the steps performed by the above-mentioned network device.

[0265] The processing element herein, as described above, may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as one or more ASICs, one or more microprocessors (DSPs), one or more FPGAs, or a combination of at least two of these integrated circuit forms. The storage element may be a single memory or a collective term for multiple storage elements.

[0266] Figure 10 For specific beneficial effects of the method for performing cell reselection by the network device shown in FIG. Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 The relevant descriptions in the method embodiments shown are not repeated here. It is understandable that the units in the embodiments of the present application can also be called modules. The above units or modules can exist independently or be integrated together.

[0267] An embodiment of the present application also provides a communication system, which includes the terminal device in any of the above method embodiments and the network device in the embodiment.

[0268] Those skilled in the art will understand that the various numerical numbers such as the first and second involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application, and also represent the order of precedence. "And / or" describes the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one" refers to one or more. At least two refers to two or more. "At least one", "any one" or similar expressions refer to any combination of these items, including any combination of single items (individuals) or plural items (individuals). For example, at least one item (individual, kind) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple. "Multiple" refers to two or more, and other quantifiers are similar.

[0269] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

[0270] The various illustrative logic units and circuits described in the embodiments of the present application can be implemented or operated by a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or the design of any combination thereof. The general-purpose processor can be a microprocessor, alternatively, the general-purpose processor can also be any traditional processor, controller, microcontroller or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration to implement.

[0271] The steps of the methods or algorithms described in the embodiments of the present application can be directly embedded in hardware, software units executed by a processor, or a combination of the two. The software units can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. Exemplarily, the storage medium can be connected to the processor so that the processor can read information from the storage medium and write information to the storage medium. Alternatively, the storage medium can also be integrated into the processor. The processor and storage medium can be provided in an ASIC, which can be provided in a terminal. Alternatively, the processor and storage medium can also be provided in different components in the terminal.

[0272] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0273] Although the embodiments of the present application have been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the embodiments of the present application. Accordingly, this specification and the drawings are merely illustrative of the embodiments of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the embodiments of the present application. Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the embodiments of the present application are also intended to include these changes and variations.

Claims

1. A cell reselection method, applied to a cell hopping scenario, characterized in that: include: receiving reselection configuration information from a network device, the reselection configuration information including reselection trigger information, reselection time range information, and reselection target information, the reselection trigger information being used to trigger execution of measurements for cell reselection, the reselection trigger information including reselection trigger time information or reselection trigger indication information, the reselection trigger time information being used to instruct the terminal device to immediately execute measurements for cell reselection when the reselection trigger time arrives, the reselection trigger indication information being used to instruct the terminal device to immediately execute measurements for cell reselection, the reselection target information being used to indicate information of a target cell for reselection measurement, and the reselection time range information being used to indicate a time range for measuring the target cell; When the time indicated by the reselection trigger time information arrives or when the reselection trigger indication information is obtained, start performing measurements to perform cell reselection; If the target cell is measured within the time range indicated by the reselection time range information and the target cell meets a first criterion, the target cell is reselected.

2. A cell reselection method, applied to a cell hopping scenario, characterized in that: include: Determine reselection configuration information, the reselection configuration information including reselection trigger information, reselection target information, and reselection time range information, the reselection trigger information is used to trigger the execution of measurements for cell reselection, the reselection trigger information includes reselection trigger time information or reselection trigger indication information, the reselection trigger time information is used to instruct the terminal device to immediately perform measurements for cell reselection when the reselection trigger time arrives, the reselection trigger indication information is used to instruct the terminal device to immediately perform measurements for cell reselection, the reselection target information is used to indicate information of a target cell for reselection measurement, and the reselection time range information is used to indicate a time range for measuring the target cell; The reselection configuration information is sent to the terminal device, where the reselection configuration information is used by the terminal device to perform measurement for cell reselection.

3. The method according to claim 2, wherein Also includes: Sending non-reselection configuration information to the terminal device, wherein the non-reselection configuration information is used by the terminal device to determine whether to perform measurement according to the reselection configuration information to perform cell reselection, the non-reselection configuration information includes one or more of non-reselection condition information, quality threshold, non-reselection area information, and non-reselection time range information, and the non-reselection condition information includes information of the measurement target cell.

4. A communication device, characterized in that: include: A processor, configured to call a program in a memory to execute the method according to claim 1.

5. A communication device, characterized in that: include: A processor, configured to call a program in a memory to execute the method according to claim 2 or 3.

6. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a program, and when the program is called by a processor, the method according to any one of claims 1 to 3 is executed.

7. A computer program product, characterized in that When the program is called by a processor, the method according to any one of claims 1 to 3 is executed.

8. A cell reselection system, applied to a cell hopping scenario, characterized in that: Including terminal equipment and network equipment; The network device is configured to send reselection configuration information to the terminal device, the reselection configuration information including reselection trigger information, reselection time range information, and reselection target information, the reselection trigger information being used to trigger execution of measurements for cell reselection, the reselection trigger information including reselection trigger time information or reselection trigger indication information, the reselection trigger time information being used to instruct the terminal device to immediately execute measurements for cell reselection when the reselection trigger time arrives, the reselection trigger indication information being used to instruct the terminal device to immediately execute measurements for cell reselection, and the reselection target information being used to indicate information of a target cell for reselection measurement; The terminal device is configured to start performing measurements to perform cell reselection when the time indicated by the reselection trigger time information arrives or when the reselection trigger indication information is acquired; If the target cell is measured within the time range indicated by the reselection time range information and the target cell meets a first criterion, the target cell is reselected.

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