A cell selection method and apparatus

Abstract

Embodiments of the present application provide a cell selection method and device. The method comprises: a communication device obtaining polarization priority information of one or more cells, performing cell measurement on the one or more cells according to the obtained polarization priority information when a cell measurement condition is met, and determining a camping cell according to measurement results of the one or more cells. The technical solution provided by the present application adds the dimension of polarization direction in cell selection, optimizes the existing cell selection strategy, and ensures that the terminal determines a more suitable camping cell.

Description

[0001] This application is a divisional application of the application No. 202010631577.8 filed on July 3, 2020, with the title of "A cell selection method and device". TECHNICAL FIELD

[0002] The present application relates to the technical field of communication, in particular to a cell selection method and device. BACKGROUND

[0003] Non-terrestrial networks (NTN) such as satellite communication have the advantages of global coverage, long-distance transmission, flexible networking, easy deployment, and no restriction by geographical conditions, which can provide services for fixed terminals and various mobile terminals. Since the traditional ground network cannot provide seamless coverage, especially in places such as the sea, desert, and air where base stations cannot be deployed, non-terrestrial networks are introduced into communication networks such as the fifth generation (5G) system, which provides seamless coverage for terminal devices by deploying base stations or part of the base station functions on high-altitude platforms or satellites, and high-altitude platforms or satellites are less affected by natural disasters, which can improve the reliability of the 5G system.

[0004] In non-terrestrial networks based on satellites, a satellite covers the ground through different beams to form a satellite cell. At the same time, a terminal device can be covered by multiple satellite cells, and the terminal device needs to be camped in a certain cell through cell selection or cell reselection.

[0005] However, a large number of tests and practices have found that based on the traditional satellite cell selection or reselection mechanism (wherein the traditional satellite cell reselection mechanism is basically the same as the cell selection or cell reselection mechanism of the 5G network), the terminal device is often difficult to camp in a suitable cell. SUMMARY

[0006] Embodiments of the present application provide a cell selection method and device to ensure that the terminal device determines a more suitable camping cell, achieves load balancing, and thus guarantees better communication effect.

[0007] In a first aspect, the present application provides a cell selection method, which can include: a communication device obtaining polarization priority information of one or more cells; when a cell measurement condition is met, performing cell measurement on the one or more cells according to the polarization priority information; and determining a camping cell according to the measurement results of the one or more cells.

[0008] The cell selection method provided in the first aspect of the present application comprises the following steps: a communication device acquires polarization priority information of a cell; and the communication device performs cell measurement according to the acquired polarization priority information of the cell to determine a camping cell. In the cell selection method, the polarization priority is considered in cell selection or reselection decision, the dimension of polarization direction is added, the existing cell selection strategy is optimized, and a more suitable camping cell can be determined by the communication device.

[0009] In a possible implementation, the cell measurement condition comprises one or more of the following: the communication device is in an initial access state or a connected state; or, there is a neighboring cell whose cell priority is higher than a serving cell of the communication device; or, the serving cell of the communication device meets a cell measurement starting threshold.

[0010] The initial access state refers to a state in which the communication device is powered on and has not yet camped on a cell. When the communication device is in an idle state or an inactive state, the cell measurement condition is related to the cell priority of a neighboring cell and the signal quality of a current serving cell. When the communication device is in a connected state, the terminal continuously performs measurement.

[0011] In a possible implementation, the cell measurement according to the polarization priority information comprises: the polarization priority information is used to indicate the priority of two polarization directions corresponding to a cell; and the communication device selects a polarization direction with high priority to perform cell measurement according to the polarization priority information.

[0012] After the communication device acquires the polarization priority information, the communication device performs cell measurement in the polarization direction with high priority to obtain a measurement result. It should be noted that the polarization priority information of a cell is determined according to the load and power consumption of different polarization directions in the cell. The load balancing in different polarization directions can be achieved by selecting a polarization direction with high priority to perform measurement and selecting a camping cell.

[0013] In a possible implementation, the camping cell is determined according to the measurement result of one or more cells, which comprises: the communication device acquires a cell measurement parameter set of the one or more cells; and the camping cell is determined according to the measurement result of the one or more cells and the cell measurement parameter set of the one or more cells.

[0014] The cell measurement parameter set comprises parameters such as R-criterion calculation parameters, a threshold of a high cell priority, and a threshold of a low cell priority. The cell measurement parameter set is determined by a cell according to the load, consumption, and throughput rate of the cell. The measurement result of the cell is related to the polarization priority, which is determined according to the load and consumption of different polarization directions in the cell. The camping cell can be selected from different neighboring cells and the polarization direction can be selected more appropriately by combining the measurement result of the cell and the cell measurement parameter set, so that the load balancing is achieved.

[0015] In a possible implementation, the determining of the camping cell according to the measurement results of the one or more cells and the cell measurement parameter set of the one or more cells comprises: obtaining an R value of each of the one or more cells according to the measurement result of the each of the one or more cells and the cell measurement parameter set corresponding to the each of the one or more cells; and determining the camping cell according to the size of the R values of the one or more cells.

[0016] For the same-cell priority cell, the R criterion is used to determine the camping cell, and the greater the R value is, the higher the signal quality in the cell is. Through the above criterion, a neighbor cell with better communication quality than the current serving cell can be selected as the camping cell.

[0017] In a possible implementation, the R value of the camping cell is greater than or equal to the R value of the serving cell.

[0018] The greater the R value is, the higher the signal quality in the cell is. By ensuring that the R value of the camping cell is greater than or equal to the R value of the serving cell, the terminal can be camped in a cell with higher signal reception power and / or signal quality, thereby providing communication quality.

[0019] In a possible implementation, the camping cell is selected according to the size of the R values of the one or more cells, comprising: selecting the cell with the highest R value as the camping cell.

[0020] After the priority of the polarization direction is considered in cell measurement, the cell with the highest R value is selected as the camping cell, which can enable the terminal to camp in a more suitable cell while ensuring load balancing of different polarization directions.

[0021] In a possible implementation, the communication apparatus obtains the polarization priority information of the one or more cells from a broadcast message, or obtains the polarization priority information of the one or more cells from a unicast message. Specifically, the polarization priority information is obtained from a broadcast message when the communication apparatus is in an idle state or an inactive state, and is obtained from a unicast message, i.e., a UE-specific message, when the communication apparatus is in a connected state.

[0022] In a possible implementation, the polarization priority information is carried in a system information block (SIB).

[0023] In the existing protocol, the cell priority information and the cell measurement parameter set are carried in the SIB and are delivered to the communication apparatus through broadcast, and therefore, the polarization priority information is also carried in the SIB, which is easy to be compatible with the existing protocol and only needs to be simply modified from the existing signaling.

[0024] In a possible implementation, the polarization priority information is used to indicate the polarization direction with high priority, and specifically, the polarization priority information comprises an identifier corresponding to the left-handed polarization or an identifier corresponding to the right-handed polarization.

[0025] For example, if the priority of the RHCP is higher, the system message carries the cellReselectionRHCPPriority or other identifier corresponding to the RHCP, for example, the network device and the communication device can agree in advance that "1" represents the RHCP, and "1" is carried. Through the above method, the polarization priority can be represented by only 1 bit, which can save bit overhead.

[0026] In a second aspect, the present application provides a cell selection method, comprising: a network device sending a first message to a communication device, the first message containing polarization priority information, wherein the polarization priority information is used to measure a cell to obtain a cell measurement result when a cell measurement condition is met, and the cell measurement result is used to select a camping cell of the communication device.

[0027] In the cell selection method provided by the second aspect of the present application, the network device sends a broadcast message carrying the polarization priority information to the communication device. The communication device determines the camping cell according to the polarization priority information, that is, the dimension of the polarization direction is added to the existing cell selection or reselection strategy, which optimizes the existing cell selection strategy and ensures that the communication device determines a more suitable camping cell.

[0028] In a possible implementation, the polarization priority information is used for cell measurement to obtain a cell measurement result, and specifically includes: the polarization priority information is used to indicate the priority of two polarization directions corresponding to the cell, wherein the polarization direction with high priority is used for cell measurement.

[0029] It should be noted that the polarization priority information of the cell is determined by the load, power consumption, etc. in different polarization directions in the cell, and selecting the polarization direction with high priority for cell measurement and selecting the camping cell can achieve load balancing in different polarization directions.

[0030] In a possible implementation, the first message further includes a set of cell measurement parameters; the set of cell measurement parameters is used to determine the camping cell of the terminal device together with the cell measurement result.

[0031] The set of cell measurement parameters includes R criterion calculation parameters, thresholds of high cell priority, and thresholds of low cell priority, etc. The set of cell measurement parameters is determined by the cell according to the cell load, consumption, throughput, etc. The measurement result of the cell is related to the polarization priority, and the polarization priority is determined according to the load, consumption, etc. in different polarization directions in the cell. Combining the cell measurement result and the set of cell measurement parameters to determine the camping cell can select a more suitable camping cell and polarization direction from different neighboring cells, and achieve load balancing.

[0032] In a possible implementation, the cell measurement parameter set is used to determine the camping cell of the terminal device together with the cell measurement result, and the cell measurement parameter set and the cell measurement result are specifically used to obtain an R value, which is used to select the camping cell of the communication device.

[0033] For a cell with a cell priority, the R criterion is used to determine the camping cell, and the greater the R value, the higher the signal quality in the cell. By calculating the R value from the R criterion calculation parameter included in the cell measurement parameter set and the cell measurement result and finding the camping cell, a neighbor cell with better communication quality than the current serving cell can be selected as the camping cell.

[0034] In a possible implementation, the first message is a broadcast message, or the first message is a unicast message. When the terminal is in an idle state or an inactive state, the first message sent by the network device is a broadcast message; when the terminal is in a connected state, the first message sent by the network device is a unicast message, that is, a UE-specific message.

[0035] In a possible implementation, the polarization priority information is carried in a system information block (SIB).

[0036] In the existing protocol, the cell priority information and the cell measurement parameter set are carried in the SIB and delivered to the communication device through broadcast, and therefore, the polarization priority information is also carried in the SIB, which is easy to be compatible with the existing protocol and only needs to be simply modified from the existing signaling.

[0037] In a possible implementation, the polarization priority information is used to indicate a polarization direction with a high priority, and specifically, the polarization priority information includes an identifier corresponding to a left-hand circular polarization or an identifier corresponding to a right-hand circular polarization.

[0038] For example, if the priority of the LHCP is higher, the system message carries the cellReselectionLHCPPriority or an identifier corresponding to the LHCP, for example, the network device and the communication device can be previously agreed that “0” represents the LHCP, and “0” is carried. Through the foregoing method, the polarization priority can be represented by only 1 bit, and bit overhead can be saved.

[0039] In a third aspect, the embodiments of the present application further provide a communication apparatus, which can be used in the communication apparatus of the first aspect. The communication apparatus can be a terminal device, or a device (for example, a chip, or a chip system, or a circuit) in the terminal device, or a device capable of being used with the terminal device. In a possible implementation, the communication apparatus can include a module or a unit corresponding to each of the methods / operations / steps / actions described in the first aspect. The module or the unit can be a hardware circuit, or software, or a combination of hardware circuit and software. In a possible implementation, the communication apparatus can include a processing unit and a transceiver unit. The processing unit can be configured to invoke the transceiver unit to perform the functions of receiving and / or transmitting. Exemplarily,

[0040] The transceiver unit is configured to acquire polarization priority information of one or more cells. The processing unit is configured to perform cell measurement on the one or more cells according to the polarization priority information when a cell measurement condition is met, and determine a camping cell according to measurement results of the one or more cells.

[0041] In a possible implementation, the cell measurement condition includes one or more of the following: the communication apparatus is in an initial access state or a connected state; or, there is a neighboring cell whose cell priority is higher than a serving cell of the communication apparatus; or, the serving cell of the communication apparatus meets a cell measurement start threshold.

[0042] In a possible implementation, the processing unit is configured to perform cell measurement according to the polarization priority information, including: the polarization priority information is used to indicate priorities of two polarization directions corresponding to a cell, and the processing unit is specifically configured to select a polarization direction with a higher priority to perform cell measurement according to the polarization priority information.

[0043] In a possible implementation, the processing unit is configured to determine the camping cell according to the measurement results of the one or more cells, including: the processing unit is further configured to acquire a cell measurement parameter set of the one or more cells, and determine the camping cell according to the measurement results of the one or more cells and the cell measurement parameter set of the one or more cells.

[0044] In a possible implementation, the processing unit is configured to determine the camping cell according to the measurement results of the one or more cells and the cell measurement parameter set of the one or more cells, including: the processing unit is specifically configured to obtain an R value of each cell in the one or more cells according to the measurement result of the each cell and a cell measurement parameter set corresponding to the each cell, and determine the camping cell according to sizes of the R values of the one or more cells.

[0045] In a possible implementation, the R value of the camping cell is greater than or equal to the R value of the serving cell.

[0046] In a possible implementation, the processing unit is configured to select the camping cell according to the magnitude of the R value of the one or more cells, including that the processing unit is specifically configured to select the cell with the highest R value as the camping cell.

[0047] In a possible implementation, the processing unit obtains the polarization priority information of the one or more cells from a broadcast message; or the processing unit obtains the polarization priority information of the one or more cells from a unicast message.

[0048] In a possible implementation, the polarization priority information is carried in a system information block (SIB).

[0049] In a possible implementation, the polarization priority information is used to indicate a polarization direction with high priority, and specifically, the polarization priority information includes an identifier corresponding to a left-handed polarization or an identifier corresponding to a right-handed polarization.

[0050] It should be noted that the beneficial effects of the various implementation manners of the communication apparatus provided in the third aspect of the embodiments of the present application are the same as those of the cell selection method described in the first aspect, which will not be repeated here.

[0051] In the fourth aspect, the embodiments of the present application further provide a communication apparatus, which can be used in the network device of the second aspect, and can be the network device, a device (for example, a chip, or a chip system, or a circuit) in the network device, or a device capable of matching the network device. In a possible implementation, the communication apparatus can include a module or unit corresponding to each of the methods / operations / steps / actions described in the second aspect, which can be a hardware circuit, or software, or a combination of hardware circuit and software. In a possible implementation, the communication apparatus can include a processing unit and a transceiver unit. The processing unit is configured to invoke the transceiver unit to perform the functions of receiving and / or transmitting. Exemplarily:

[0052] The processing unit is configured to determine polarization priority information, and the transceiver unit is configured to send a first message containing the polarization priority information to the communication apparatus, where the polarization priority information is used to measure a cell to obtain a cell measurement result when a cell measurement condition is met, and the cell measurement result is used to select a camping cell of the communication apparatus.

[0053] In a possible implementation, the polarization priority information is used for cell measurement to obtain a cell measurement result, and specifically includes that the polarization priority information is used to indicate the priority of two polarization directions corresponding to a cell, and the polarization direction with high priority is used for cell measurement.

[0054] In a possible implementation, the first message further comprises a cell measurement parameter set; the cell measurement parameter set is used to determine a camping cell of the terminal device together with the cell measurement result.

[0055] In a possible implementation, the cell measurement parameter set is used to determine the camping cell of the terminal device together with the cell measurement result, including: the cell measurement parameter set and the cell measurement result are specifically used to obtain an R value; the R value is used to select the camping cell of the terminal device.

[0056] In a possible implementation, the first message is a broadcast message; or the first message is a unicast message.

[0057] In a possible implementation, the polarization priority information is carried in a system information block (SIB).

[0058] In a possible implementation, the polarization priority information is used to indicate a polarization direction with high priority, and specifically, the polarization priority information comprises an identifier corresponding to a left-handed polarization or an identifier corresponding to a right-handed polarization.

[0059] It should be noted that the beneficial effects of the various implementation manners of the communication apparatus provided in the fourth aspect of the embodiments of the present application can refer to the beneficial effects of the cell selection method described in the fourth aspect, which will not be described here again.

[0060] In the fifth aspect, the embodiments of the present application further provide a communication apparatus, comprising a processor configured to execute computer programs or executable instructions stored in a memory, when the computer programs or executable instructions are executed, the apparatus executes the method in the first aspect and the various possible implementation manners of the first aspect.

[0061] In a possible implementation, the processor and the memory are integrated together;

[0062] In another possible implementation, the memory is located outside the communication apparatus.

[0063] The communication apparatus further comprises a communication interface, which is used for the communication apparatus to communicate with other devices, for example, to send or receive data and / or signals. Exemplarily, the communication interface can be a transceiver, a circuit, a bus, a module or other types of communication interfaces.

[0064] In the sixth aspect, the embodiments of the present application further provide a communication apparatus, comprising a processor configured to execute computer programs or executable instructions stored in a memory, when the computer programs or executable instructions are executed, the apparatus executes the method in the second aspect and the various possible implementation manners of the second aspect.

[0065] In a possible implementation, the processor and the memory are integrated together.

[0066] In another possible implementation, the memory is located outside the communication apparatus.

[0067] The communication apparatus further includes a communication interface, configured to perform communication, for example, transmission or reception of data and / or signals, with other devices. For example, the communication interface can be a transceiver, a circuit, a bus, a module or other types of communication interfaces.

[0068] In a seventh aspect, an embodiment of the present application further provides a communication apparatus, including an input / output interface and a logic circuit. The input / output interface is configured to input or output signals or data. The input / output interface is specifically configured to acquire polarization priority information of one or more cells; and the input / output interface is further configured to output measurement results of the one or more cells. The logic circuit is configured to perform the method in the first aspect and any possible implementation thereof to determine a camped cell.

[0069] In an eighth aspect, an embodiment of the present application further provides a communication apparatus, including an input / output interface and a logic circuit. The logic circuit is configured to perform the method in the second aspect and any possible implementation thereof to determine a first message, in which polarization priority information is carried. The input / output interface is configured to output the first message including the polarization priority information. The input / output interface is further configured to acquire cell measurement results.

[0070] In a ninth aspect, an embodiment of the present application further provides a computer readable storage medium, which stores a computer program, wherein the computer program is executed by a processor, so that some or all of the steps of the method in the first aspect and any possible implementation thereof, the second aspect and any possible implementation thereof are performed.

[0071] In a tenth aspect, an embodiment of the present application further provides a computer program product including executable instructions, which, when executed on a user equipment, cause some or all of the steps of the method in the first aspect and any possible implementation thereof, the second aspect and any possible implementation thereof to be performed.

[0072] In an eleventh aspect, an embodiment of the present application further provides a chip system, which includes a processor and can further include a memory, and is configured to implement the method in the first aspect and any possible implementation thereof, the second aspect and any possible implementation thereof. The chip system can be composed of a chip, or can include a chip and other discrete devices. BRIEF DESCRIPTION OF DRAWINGS

[0073] Some of the drawings involved in the embodiments of the present application will be described below.

[0074] Figure 1 is a schematic diagram of a communication system provided by an embodiment of the present application.

[0075] Figure 2 is an application scenario provided by an embodiment of the present application.

[0076] Figure 3 is a flowchart of a cell selection method provided by an embodiment of the present application.

[0077] Figure 4A is a signaling schematic diagram of a system message SIB2 containing polarization priority provided by an embodiment of the present application.

[0078] Figure 4B is a signaling schematic diagram of a system message SIB3 containing polarization priority provided by an embodiment of the present application.

[0079] Figure 4C is a signaling schematic diagram of a system message SIB4 containing polarization priority provided by an embodiment of the present application.

[0080] Figure 5 is an interaction schematic diagram of a cell selection method provided by an embodiment of the present application.

[0081] Figure 6 is an interaction schematic diagram of a cell switching method provided by an embodiment of the present application.

[0082] Figure 7 is a structural schematic diagram of a communication apparatus provided by an embodiment of the present application.

[0083] Figure 8 is a structural schematic diagram of another communication apparatus provided by an embodiment of the present application.

[0084] Figure 9 is a structural schematic diagram of still another communication apparatus provided by an embodiment of the present application. DETAILED DESCRIPTION

[0085] The present application provides a cell selection method and apparatus to optimize existing cell selection / cell reselection strategy and determine a more suitable camped cell. The method and apparatus are based on the same application concept, and the implementation of the apparatus and the method can be referred to each other since the principles of the method and the apparatus to solve the problem are similar, and the repeated parts will not be described again.

[0086] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0087] The term “and / or” in this document is only used to describe associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The terms “first” and “second” in the specification and claims of the embodiments of the present application are used to distinguish different objects, and are not used to describe the specific order of the objects. For example, the first network device and the second network device are used to distinguish different network devices, and are not used to describe the specific order of the target objects. In the embodiments of the present application, the words “exemplary” or “for example” are used to mean an example, illustration, or description. Any embodiment or design scheme described as “exemplary” or “for example” in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words “exemplary” or “for example” are used in the sense of presenting related concepts in a concrete manner. In the description of the embodiments of the present application, unless otherwise specified, the meaning of “a plurality of” is two or more. For example, a plurality of processing units means two or more processing units; a plurality of systems means two or more systems.

[0088] The technical solutions of the present application can be applied to satellite communication systems, high altitude platform station (HAPS) communication, and non-terrestrial network (NTN) systems. The satellite communication system can be integrated with a traditional mobile communication system. For example, the mobile communication system can be a 4th generation (4G) communication system, such as a long term evolution (LTE) system, a worldwide interoperability for microwave access (WiMAX) communication system, a 5th generation (5G) communication system, such as a new radio (NR) system, and a future mobile communication system, etc.

[0089] Referring to Figure 1 , Figure 1 An example of a communication system suitable for use with the embodiments of the present application is shown in FIG. 1. As shown in FIG. 1, the communication system includes a base station 100, a terminal 200, and a core network 300. Figure 1The access point employs multiple beams to cover a service area, and different beams can communicate through one or more of time division, frequency division, and space division. The access point is not limited to a satellite base station or a ground base station. The access point can be deployed on a high-altitude platform or a satellite. The satellite can be a non-geostationary earth orbit (NGEO) satellite or a geostationary earth orbit (GEO) satellite. The satellite mentioned in the embodiments of the present application can also be a satellite base station or a network side device carried on a satellite.

[0090] The access point can be an evolutional Node B (eNB or eNodeB) in LTE, or a base station in a 5G network or a future evolved public land mobile network (PLMN), a broadband network gateway (BNG), a convergence switch, or a non-3rd generation partnership project (3GPP) access device, etc., which is not specifically limited in the embodiments of the present application. Optionally, the base station in the embodiments of the present application can include various forms of base stations, such as a macro base station, a micro base station (also referred to as a small station), a relay station, an access point, a next-generation base station (gNodeB, gNB), a transmitting and receiving point (TRP), a transmitting point (TP), a mobile switching center, and a device-to-device (D2D), vehicle-to-everything (V2X), machine-to-machine (M2M) communication device that assumes a base station function, etc., which is not specifically limited in the embodiments of the present application.

[0091] An access point can communicate with a core network device to provide communication services to a terminal device. The core network device is, for example, a device in a 5G network core network (CN). The core network provides an interface to a data network as a bearer network, and provides a user equipment (UE) with communication connection, authentication, management, policy control, and completion of bearer for data services. The CN further includes, for example, an access and mobility management network element (Access and Mobility Management Function, AMF), a session management network element (Session Management Function, SMF), an authentication server network element (Authentication Server Function, AUSF), a policy control node (Policy control Function, PCF), a user plane function network element (User Plane Function, UPF), and the like.

[0092] The communication apparatus mentioned in the embodiments of the present application can be a terminal device, including various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem having a wireless communication function, and can specifically refer to a user equipment (UE), an access terminal, a subscriber unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The terminal device can also be a satellite phone, a cellular phone, a smartphone, a wireless data card, a wireless modem, a machine type communication device, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with a wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a terminal device in a 5G network or a future communication network, and the like, without limitation of the present application.

[0093] Referring to Figure 2 , Figure 2 An application scenario suitable for the embodiments of the present application is shown, specifically a network application architecture of 3GPP members integrating satellite communication and 5G technology. It should be noted that the application architecture is not a limitation of the present application. The communication method provided by the embodiments of the present application can also be applied to other scenarios of integration of ground communication systems and satellite communication. The ground mobile terminal accesses the network through the 5G new air interface, the satellite acts as a 5G base station, and is connected to the ground core network through a wireless link. At the same time, there is a wireless link between the satellites to complete the signaling interaction and user data transmission between base stations. Figure 2 The various network elements in and their interface descriptions are as follows:

[0094] Terminal device: a mobile device supporting 5G new air interface, which can access the satellite network through the air interface and initiate calls, online services, etc. For example, various terminal devices as described above, which are not repeated here.

[0095] 5G base station: mainly provides wireless access services, schedules wireless resources to access terminals, provides reliable wireless transmission protocols and data encryption protocols, etc.

[0096] 5G core network: user access control, mobility management, session management, user security authentication, billing, etc. It is composed of multiple functional units and can be divided into control plane and data plane functional entities. Access and mobility management unit (AMF) is responsible for user access management, security authentication, and mobility management. User plane unit (UPF) is responsible for managing user plane data transmission, traffic statistics, and other functions.

[0097] Ground station: responsible for forwarding signaling and service data between satellite base station and 5G core network.

[0098] 5G new air interface: wireless link between terminal and base station.

[0099] Xn interface: interface between 5G base stations, mainly used for handover signaling interaction, etc.

[0100] NG interface: interface between 5G base station and 5G core network, mainly interacting with core network non-access layer (non-access stratum, NAS) signaling, etc. And user service data.

[0101] In order to understand the embodiments of the present application, first introduce the cell selection and cell reselection mechanism of the traditional ground network.

[0102] 1) Cell selection (cell selection)

[0103] After the terminal device is powered on, it first selects a suitable PLMN and performs cell selection on the PLMN. Cell selection is divided into two types: initial cell selection and cell selection based on stored cell information. Cell selection is divided into four steps: frequency scanning, cell search, system message decoding, and camping.

[0104] During initial cell selection, a frequency scan is performed first, followed by cell search. Specifically, the terminal scans all radio frequency channels based on its supported NR bands, searching for the strongest cell at each frequency. Cell selection based on stored cell information directly searches for cells using the stored frequency information. The terminal device obtains the cell with the best coverage through cell search and simultaneously acquires its physical cell identifier. After the cell search is complete, the terminal device reads the cell system message, measures the cell's signal strength and signal quality, and determines whether the cell meets the camping conditions.

[0105] Cell dwelling conditions are determined using the S criterion. A cell is allowed to dwell when the S value Srxlev > 0 and Squal > 0.

[0106] Srxlev=Qrxlevmeas–(Qrxlevmin+Qrxlevminoffset)-Pcompensation-Qoffsettemp

[0107] Squal=Qqualmeas–(Qqualmin+Qqualminoffset)–Qoffsettemp

[0108] Where Qrxlevmeas is the reference signal received power (RSRP) value of the measured cell;

[0109] Qrxlevmin is the minimum RSRP (Received Strength Per Second) requirement in the cell, which is obtained from the broadcast message;

[0110] Qrxlevminoffset is the offset value from the minimum access level to prevent ping-pong reselection;

[0111] Pcompensation is the compensation value = MAX(Pemax-Pumax,0), which is the configured value. The difference between Pcompensation and the actual uplink transmission power of the terminal is the larger of 0 and MAX(Pemax-Pumax,0).

[0112] Qqualmin = q-QualMin(SIB2), where q-QualMin(SIB2) is carried in system information block (SIB)2. If SIB3 is configured with q-QualMinOffsetCell, then Qqualmin = q-QualMin(SIB2) + q-QualMinOffsetCell(SIB3).

[0113] Qoffsettemp is a temporary offset value that is announced in a system broadcast.

[0114] 2) cell reselection

[0115] In order to obtain better network service, terminal device performs cell reselection in idle state or inactive state. Cell reselection is divided into the following steps: (1) measuring the current serving cell and the neighbor cell according to the measurement start condition; (2) judging whether the neighbor cell meets the reselection criterion; (3) if yes, starting reselection, receiving the system message of the new cell, and camping on the new cell if there is no reception restriction; if no, staying in the current serving cell.

[0116] The cell measurement start condition is related to the cell priority and the signal quality of the current serving cell. As shown in Table 1, the cell reselection scenario can be divided into intra-frequency cell reselection and inter-frequency / inter-system cell reselection.

[0117] Table 1

[0118]

[0119] In the intra-frequency cell reselection, when the S value of the serving cell is less than or equal to a given threshold S_intrasearch (intra-frequency measurement threshold), the intra-frequency measurement needs to be started, otherwise the UE can choose to stop the measurement. In the actual network, in order to save energy consumption, the UE usually stops the measurement when S>S_intrasearch. After obtaining the measurement result, the terminal sorts the candidate cells based on the R criterion, and selects the optimal cell for camping.

[0120] The R criterion is that an R (Rank) value is calculated for each neighbor cell and the current serving cell according to the cell signal quality, and then the R values are sorted according to the size, the R value is greater than that of the current serving cell, the reselection criterion is met, there are multiple ones that meet the criterion, and the best one is selected. If the R criterion is continuously met for more than TreselectionRAT, and the terminal stays in the current serving cell for more than 1s, the reselection to the cell is started. TreselectionRAT represents the time interval of cell reselection.

[0121] The R value of the current serving cell can be calculated by the following formula:

[0122] Rs=Qmeas,s+Q hyst –Qoffsettemp

[0123] The R value of the neighbor cell can be calculated by the following formula:

[0124] Rn=Qmeas,n-Qoffset-Qoffsettemp

[0125] Where Qmeas,s represents the signal quality of the current serving cell, obtained through cell measurements, specifically the RSRP value of the serving cell; Qmeas,n represents the signal quality of neighboring cells, obtained through cell measurements, specifically the RSRP value of the neighboring cells; Q hyst The reselection hysteresis value of the current serving cell is obtained from the system. The larger this value, the larger the boundary of the serving cell, and the more difficult it is to reselect to a neighboring cell. Qoffset is a parameter for calculating the R criterion, obtained from system messages. During intra-frequency reselection, this value is taken as Qoffset. cell When reselecting from different frequencies, this value is taken as Qoffset. Cell +Qoffset Freq Qoffsettemp is also a parameter for calculating the R criterion, obtained from system messages. hyst The values ​​of the R criteria calculation parameters such as Qoffset, Qoffsettemp, etc. are all greater than or equal to zero.

[0126] Inter-frequency / inter-system cell reselection must be differentiated according to priority. For high-priority cells, the terminal needs to continuously perform measurements, and reselect to that cell when the S-value of the high-priority cell exceeds a corresponding threshold. For cells of equal or lower priority, when the S-value of the serving cell exceeds a given threshold S_nonintrasearch (inter-frequency / inter-system measurement threshold), intra-frequency measurement must be enabled; otherwise, the UE can choose to disable measurement. After obtaining the measurement results, the terminal selects the optimal cell for camping based on the cell reselection criteria corresponding to different priority relationships. For high-priority cells, within TreselectionRAT, the S-value of the high-priority cell must exceed a preset threshold (Thresh). X,HighQ Or Thresh X,HighP If the terminal remains in the current serving cell for more than 1 second, a reselection to that cell will be initiated. For low-priority cells, if the serving cell S value within TreselectionRAT is less than a preset threshold (Thresh...), the terminal will be considered a low-priority cell. Serving,LowQ Or Thresh Serving,LowP And the S-value of the low-priority cell is greater than the preset threshold (Thresh). X,LowQ Or Thresh X,LowP If the terminal remains in the current serving cell for more than 1 second, a reselection to that cell will be initiated.

[0127] Different from the ground communication system, the satellite communication system usually adopts polarization multiplexing, such as left-hand circular polarization (LHCP) or right-hand circular polarization (RHCP), or horizontal polarization or vertical polarization, or other orthogonal polarizations, different satellite cells adopt different polarization modes for signal transmission, so as to improve the spectral efficiency. The loads in different polarization directions of the same satellite can be different.

[0128] If the satellite communication adopts the same mechanism as the traditional ground network cell selection or cell reselection mechanism, the terminal can be difficult to camp on a more suitable cell many times. To solve the above problem, the polarization multiplexing mode is introduced in the NTN cell, the physical dimension of cell selection is increased, and the optimized cell selection strategy is realized by indicating the polarization direction. The cell selection and cell reselection strategy provided in the embodiment of the application considers the dimension of the polarization direction in addition to the cell priority and the cell signal quality, and can comprehensively determine a more suitable camping cell and ensure load balancing in different polarization directions.

[0129] Referring to Figure 3 , Figure 3 A flowchart of the cell selection and cell reselection strategy provided in the embodiment of the application is shown. In the embodiment, the network device broadcasts polarization priority information, which is used for reference by the user when making a decision on cell selection or cell reselection, so as to comprehensively determine a more suitable camping cell.

[0130] First of all, it should be pointed out that the communication device described in the application can be the terminal of the foregoing various types, and hereinafter the terminal is taken as an example for description.

[0131] S301, obtain polarization priority information.

[0132] The terminal obtains the polarization priority information. The polarization priority information is used to indicate the priority of two or more polarization directions corresponding to the cell.

[0133] The network device sends a first message to the terminal, and the first message carries the polarization priority information. Correspondingly, the terminal receives the first message sent by the network device.

[0134] Possibly, the first message is a broadcast message, or the first message is a unicast message. Specifically, when the terminal is in an idle state (idle), an inactive state (inactive), the first message can be a broadcast message; when the terminal is in a connected state (connected), the first message can be a unicast message.

[0135] In a possible implementation, the network device delivers polarization priority information of one or more cells through a first message, and the terminal receives the first message sent by the network device and acquires the polarization priority information from the first message.

[0136] The polarization priority information of one or more cells delivered by the network device can include polarization priority information of the current cell and polarization priority information of adjacent cells. Possibly, the polarization priority information is bound to the cell identifier.

[0137] Possibly, the polarization priority information can be carried in a system information block (SIB). In consideration of compatibility with existing protocols, the existing signaling can be simply modified. Taking system information SIB2, SIB3 and SIB4 in NR as examples: SIB2 contains cell reselection information related to the serving cell; SIB3 contains information about the serving frequency and the intra-frequency adjacent cell related to cell reselection; and SIB4 contains information about other NR frequencies and inter-frequency adjacent cells related to cell reselection.

[0138] As shown in FIG. 2, the cell reselection serving frequency information cellReselectionServingFreqInfo in SIB2 can also carry the priority of the two polarization directions, and the priorities of the left-hand circular polarization and the right-hand circular polarization are indicated by the cellReselectionLHCPPriority field and the cellReselectionRHCPPriority field respectively (the part marked by the dashed box in the figure). Figure 4A

[0139] As shown in FIG. 3, the intra-frequency cell reselection information IntraFreqCellReselectionInfo in SIB3 can carry the priority of the two polarization directions, and the priorities of the left-hand circular polarization and the right-hand circular polarization are indicated by the cellReselectionLHCPPriority field and the cellReselectionRHCPPriority field respectively (the part marked by the dashed box in the figure). Figure 4B

[0140] As shown in FIG. 4, the inter-frequency carrier frequency information InterFreqCarrierFreqInfo in SIB4 can carry the priority of the two polarization directions, and the priorities of the left-hand circular polarization and the right-hand circular polarization are indicated by the cellReselectionLHCPPriority field and the cellReselectionRHCPPriority field respectively (the part marked by the dashed box in the figure). Figure 4C

[0141] ​​​In a possible implementation, the polarization priority information corresponding to the LHCP and the RHCP is carried in the system message simultaneously, and the polarization direction with a higher value is the polarization direction with a higher priority. For example, if cellReselectionLHCPPriority=0 and cellReselectionRHCPPriority=1, it indicates that the RHCP is the polarization direction with a higher priority.

[0142] In another possible implementation, the polarization priority information is used to indicate the polarization direction with a higher priority, and specifically, the polarization priority information includes an identifier corresponding to the LHCP or an identifier corresponding to the RHCP. For example, if the RHCP corresponds to a higher priority, the system message carries cellReselectionRHCPPriority or another identifier corresponding to the RHCP, and does not carry an identifier corresponding to another polarization direction. For another example, the network device and the terminal can agree in advance that "1" represents the RHCP and "0" represents the LHCP, and if the RHCP corresponds to a higher priority, the value of the bit corresponding to the polarization priority is 1, and if the LHCP corresponds to a higher priority, the value of the bit corresponding to the polarization priority is 0. Alternatively, "1" can represent the LHCP and "0" represents the RHCP, which is not limited in this application. In this possible implementation, only 1 bit is needed to represent the polarization priority, which can reduce the bit overhead.

[0143] It should be noted that the polarization priority information of a cell is determined by the load and power consumption in different polarization directions in the cell, and different manufacturers can use different algorithms to determine the cell priority. For example, if the load in the LHCP direction of a cell is larger and the load in the RHCP direction is smaller, the RHCP with a smaller load is used as the polarization direction with a higher priority, so as to achieve load balancing.

[0144] S302, when the cell measurement condition is met, performing cell measurement according to the polarization priority information.

[0145] Specifically, when the cell measurement condition is met, the terminal selects the polarization direction with a higher polarization priority on the measurement port to perform cell measurement according to the polarization priority information obtained from the first message.

[0146] In a possible implementation, the terminal selects the polarization direction with a higher polarization priority of each of one or more cells to perform cell measurement according to the polarization priority information of the one or more cells obtained from the first message, to obtain cell measurement results of the one or more cells.

[0147] The cell measurement condition includes one or more of the following: the terminal is in an initial access state or a connected state; or there is a neighbor cell with a cell priority higher than a current serving cell of the terminal; or the serving cell of the terminal satisfies a cell measurement starting threshold. It should be noted that the initial access state refers to a state in which the terminal has just been powered on and has not camped on a cell. At this time, the terminal performs cell search through frequency sweeping or based on stored cell information, acquires a cell with the best coverage, synchronizes to the cell, and acquires a physical cell identifier; after the cell search is completed, the terminal device decodes a cell system message to acquire polarization priority information of the cell and other cell selection related parameters, and performs cell measurement according to the polarization priority information.

[0148] When the terminal is in the connected state, cell measurement is continuously performed, and the terminal periodically reports the measurement result to the network device or reports the measurement result to the network device under an event triggering condition.

[0149] When the terminal is in the idle state or the inactive state, if there is a neighbor cell with a cell priority higher than the current serving cell, measurement is unconditionally started. The cell priority information can be acquired from a system message SIB issued by the current serving cell. For example, the cell priority information can be represented by cellReselectionPriority carried in the SIB message, and the value range is an integer from 0 to 7. The larger the parameter value is, the higher the cell priority is. The cell priority can be determined by cell load, power consumption, etc. Possibly, different manufacturers can use different algorithms to determine the cell priority, which is not limited in the present application.

[0150] When the terminal is in the idle state, and the cell priority of the neighbor cell is equal to or lower than the current serving cell, if the current serving cell satisfies the cell measurement starting threshold, cell measurement is performed. For example, for a same-frequency cell, when the S value of the current serving cell is less than or equal to the same-frequency measurement threshold (S_IntraSearch), the terminal performs cell measurement according to the polarization priority information; for a different-frequency or different-system cell, when the S value of the current serving cell is less than or equal to the different-frequency measurement threshold (S_nonIntraSearch), the terminal performs cell measurement according to the polarization priority information. Specifically, when the neighbor cell is a same-priority same-frequency cell, Srxlev of the current serving cell = <SIntraSearchP and Squal = <SIntraSearchQ, the terminal performs cell measurement according to the polarization priority information; when the neighbor cell is a same-priority different-frequency / different-system cell or a low-priority different-frequency / different-system cell, Srxlev of the current serving cell = <SnonIntraSearchP and Squal = <SnonIntraSearchQ, the terminal performs cell measurement according to the polarization priority information.

[0151] In one possible implementation, for an intra-frequency cell, when the S value of the current serving cell is less than an intra-frequency measurement threshold (S_IntraSearch), the terminal performs cell measurement according to the polarization priority information, and when the S value of the current serving cell is equal to S_IntraSearch, the terminal does not perform cell measurement; for an inter-frequency or inter-system cell, when the S value of the current serving cell is less than an inter-frequency measurement threshold (S_nonIntraSearch), the terminal performs cell measurement according to the polarization priority information, and when the S value of the current serving cell is equal to S_nonIntraSearch, the terminal does not perform cell measurement.

[0152] It should be noted that all boundary conditions (for example, the case where the S value is equal to the measurement threshold) involved in the embodiments of the present application can be handled in the above manner. For example, when the S value is in a boundary condition, the terminal can perform cell measurement or can not perform cell measurement. The calculation method of the S value is described above and will not be repeated here.

[0153] S303, determining a camping cell according to the measurement result.

[0154] The first message sent by the network device also carries a set of cell measurement parameters. Possibly, the set of cell measurement parameters includes R criterion calculation parameters, a high-priority cell S value preset threshold, a low-priority cell S value preset threshold, and the like. The R criterion calculation parameters include: a current serving cell reselection hysteresis value Q Hyst , a bias value Q offset , a temporary bias value Q offsettemp , and the like; the high-priority cell S value preset threshold includes: Thresh X,HighQ and / or Thresh X,HighP ; and the low-priority cell S value preset threshold includes: Thresh X,LowQ and / or ThreshX,LowP.

[0155] The terminal determines a camping cell according to the cell measurement result and the set of cell measurement parameters.

[0156] In one possible implementation, the terminal obtains a set of cell measurement parameters of one or more cells, and determines a camping cell according to the cell measurement result of the one or more cells and the set of cell measurement parameters.

[0157] When the neighbor cell is an intra-frequency cell or an inter-frequency same-priority cell, the terminal obtains an R value of each of the one or more cells according to the measurement result of each of the one or more cells and the set of cell measurement parameters corresponding to each of the one or more cells, and determines a camping cell according to the size of the R value of the one or more cells.

[0158] For example, the R value of the current serving cell can be obtained according to the signal quality Qmeas,s and a reselection hysteresis value Q of the current serving cell included in the cell parameter set hyst and R criterion calculation parameter Qoffsettemp included in the cell parameter set. For details, please refer to the foregoing, which will not be repeated here.

[0159] The terminal determines the camping cell according to the size of the R value of one or more cells, wherein the R value of the camping cell is greater than or equal to the R value of the current serving cell, and specifically includes: the terminal selects a neighbor cell with a first R value greater than or equal to the R value of the current serving cell as the camping cell; or the terminal selects a cell with the largest R value as the camping cell; or the terminal selects a cell with the largest RSRP from the neighbor cells with an R value greater than the R value of the current serving cell as the camping cell.

[0160] In a possible implementation, when the R value of the neighbor cell is equal to the R value of the current serving cell, the neighbor cell is determined as the camping cell. In this possible implementation, the terminal can camp in the neighbor cell in advance, reducing the subsequent cell switching caused by satellite movement.

[0161] In another possible implementation, when the R value of the neighbor cell is equal to the R value of the current serving cell, the terminal continues to camp in the current serving cell. In this possible implementation, the terminal does not change the current camping cell, which can reduce the number of camping cell switching and avoid frequent cell reselection.

[0162] When the neighbor cell is a high-priority cell, the terminal obtains the S value of each cell according to the measurement result of one or more cells and the cell measurement parameter set corresponding to each cell, and compares the S value with a preset threshold of the high-priority cell in the cell measurement parameter set to determine the camping cell. The S value of the camping cell should be greater than the preset threshold. Specifically, when there are multiple cells with an S value greater than the preset threshold, the cell with the largest S value is selected as the camping cell. Possibly, the S value of the camping cell can be equal to the preset threshold of the high-priority cell.

[0163] For example, the S value can be Srxlev and / or Squal. For details of the specific calculation method of Srxlev and Squal, please refer to the foregoing, which will not be repeated here. Comparing the S value with the preset threshold of the high-priority cell in the cell measurement parameter set specifically includes: comparing Srxlev with the threshold value Thresh X,HighQ in the cell measurement parameter set, and / or comparing Squal with the threshold value Thresh X,HighP in the cell measurement parameter set.

[0164] When the neighbor cell is a low-priority cell, the terminal obtains an S value of each cell according to the measurement result of one or more cells and the cell measurement parameter set corresponding to each cell, and compares the S value with a low-priority preset threshold in the cell measurement parameter set to determine the camping cell. Specifically, when the S value of the serving cell is less than the preset threshold and the S value of the neighbor cell is greater than the low-priority preset threshold, the neighbor cell is selected as the camping cell. When there are multiple cells with S values greater than the preset threshold, the cell with the largest S value is selected as the camping cell. Possibly, the S value of the camping cell can be equal to the low-priority preset threshold.

[0165] For example, the S value can be Srxlev and / or Squal. The specific calculation of Srxlev and Squal is described above and will not be repeated here. Comparing the S value with the low-priority preset threshold in the cell measurement parameter set specifically includes: comparing Srxlev with the threshold value Thresh X,LowQ in the cell measurement parameter set, and / or comparing Squal with the threshold value Thresh X,LowP in the cell measurement parameter set.

[0166] Figure 3 In the cell selection strategy shown in the figure, the terminal obtains the polarization priority information sent by the network, and selects the polarization direction with high priority to perform cell measurement according to the polarization priority information, so as to determine the camping cell. Through the indication of the priority of the polarization direction, the network ensures that the terminal selects a more suitable camping cell in combination with different polarization directions, so as to realize load balancing in different polarization directions.

[0167] Referring to Figure 5 , Figure 5 This embodiment provides an interaction diagram of the cell selection and cell reselection strategy. In this embodiment, the network device sends different cell measurement parameter sets for different polarization directions of the same cell, and the terminal calculates the corresponding threshold value according to the cell measurement parameter set corresponding to each polarization direction, and comprehensively decides a more suitable camping cell and its polarization direction in combination with the cell measurement result.

[0168] S501, the network device broadcasts a system message, and correspondingly, the terminal receives the system message broadcast by the network device. The system message includes cell measurement parameter sets corresponding to different polarization directions.

[0169] The cell measurement parameter set corresponding to different polarization directions includes R criterion calculation parameters corresponding to different polarization directions, a high-priority cell S value preset threshold, a low-priority cell S value preset threshold, and the like. The cell measurement parameter set corresponding to different polarization directions can also include other parameters, which are not limited in the present application.

[0170] The R criterion is used to determine the camping cell, and details are described above and will not be repeated here.

[0171] For example, the S value can be Srxlev and / or Squal, and specific calculation methods of Srxlev and Squal are described above and will not be repeated here.

[0172] The R criterion calculation parameters include: the current serving cell reselection hysteresis value Qhyst, the offset value Qoffset, the temporary offset value Qoffsettemp, and the like. For example, the R criterion calculation parameters corresponding to the LHCP can be represented as Qhyst, Qoffset, and Qoffsettemp, respectively; and the R criterion calculation parameters corresponding to the RHCP can be represented as Qhyst, Qoffset, and Qoffsettemp, respectively. Hyst Hyst_LHCP _LHCP _LHCP Hyst_RHCP _RHCP _RHCP

[0173] The high cell priority S value preset threshold includes Thresh X,HighQ and / or Thresh X,HighP . For example, the high cell priority S value preset threshold corresponding to the LHCP can be represented as Thresh X_LHCP,HighQ and / or Thresh X_LHCP,HighP ; and the high cell priority S value preset threshold corresponding to the RHCP can be represented as Thresh X_RHCP,HighQ and / or Thresh X_RHCP,HighP .

[0174] The low cell priority S value preset threshold includes Thresh X,LowQ and / or Thresh X,LowP . For example, the low cell priority S value preset threshold corresponding to the LHCP can be represented as Thresh X_LHCP,LowQ and / or Thresh X_LHCP,LowP ; and the low cell priority S value preset threshold corresponding to the RHCP can be represented as Thresh X_RHCP,LowQ and / or Thresh X_RHCP,LowP . It should be noted that other ways of representing various parameters corresponding to different polarization directions can also be used, and the present application does not make any limitation.

[0175] ​​​​​​​It should be noted that the cell priority information can be obtained from the system information SIB sent by the current serving cell. For example, the cell priority information can be represented by cellReselectionPriority carried in the SIB message, which is an integer ranging from 0 to 7. The larger the parameter value, the higher the cell priority. The cell priority can be determined by the cell load, power consumption, etc. Possibly, different manufacturers can use different algorithms to determine the cell priority, which is not limited in the present application.

[0176] In a possible implementation, the network device broadcasts a set of measurement parameters corresponding to different polarization directions of each of one or more cells, and correspondingly, the terminal receives the set of measurement parameters corresponding to different polarization directions of each of one or more cells broadcast by the network device.

[0177] It should be noted that the cell measurement parameters corresponding to different polarization directions of the cell are determined by the load and power consumption in different polarization directions of the cell. Different manufacturers can use different algorithms to determine the cell priority. For example, if the load in the LHCP direction of a cell is larger and the load in the RHCP direction is smaller, the bias value corresponding to the LHCP direction can be increased, such as Qoffset _LHCP , Qoffsettemp _LHCP , and the bias value corresponding to the RHCP direction can be reduced, such as Qoffset _RHCP , Qoffsettemp _RHCP , so as to balance the load in different polarization directions.

[0178] S502, when the cell measurement condition is met, performing cell measurement.

[0179] The cell measurement condition includes one or more of the following: the terminal is in an initial access state or a connected state; or there is a neighboring cell with a higher cell priority than the current serving cell of the terminal; or the serving cell of the communication device meets a cell measurement start threshold. For details, please refer to the content described in S302, which will not be repeated here.

[0180] When the cell measurement condition is met, the terminal performs cell measurement and obtains a cell measurement result.

[0181] In a possible implementation, the terminal measures one or more cells and obtains a measurement result corresponding to the one or more cells.

[0182] S503, determining a camping cell according to the cell measurement result and the set of cell measurement parameters.

[0183] After obtaining the cell measurement results, the terminal determines the cell to camp on based on these results and the set of cell measurement parameters corresponding to different polarization directions obtained from the broadcast message. Specifically, the terminal calculates the threshold corresponding to each polarization direction based on the cell measurement results and the set of cell measurement parameters corresponding to each polarization direction, and determines the cell to camp on and the polarization direction based on the threshold.

[0184] In one possible implementation, the terminal obtains a set of measurement parameters corresponding to different polarization directions of each cell in one or more cells, and determines the cell to be camped and its corresponding polarization direction based on the set of measurement parameters corresponding to different polarization directions of each cell in one or more cells and the measurement results of each cell in the one or more cells.

[0185] When neighboring cells are co-frequency cells or inter-frequency cells with the same priority, the terminal obtains the R value of each cell based on the measurement results of each cell in one or more cells, as well as the set of cell measurement parameters corresponding to different polarization directions of each cell; and determines the stationary cell and the corresponding polarization direction based on the magnitude of the R value of one or more cells in different polarization directions.

[0186] For example, when determining the serving cell by obtaining two R values ​​corresponding to LHCP and RHCP for each cell, the R value of the serving cell is compared with the R value of the neighboring cell with the higher polarization direction to determine the serving cell.

[0187] The R value in the LHCP direction of the current serving cell can be determined based on the signal quality Q of the current serving cell obtained from cell measurements. meas,s And the reselection hysteresis value Q corresponding to the LHCP direction of the current serving cell, which is included in the cell parameter set. Hyst_LHCP And the R criterion calculates the parameter Qoffsettemp _LHCP The R value in the RHCP direction of the current serving cell can be obtained from the signal quality Q of the current serving cell obtained by cell measurement. meas,s And the reselection hysteresis value Q corresponding to the RHCP direction of the current serving cell, contained in the cell parameter set. Hyst_RHCP And the R criterion calculates the parameter Qoffsettemp _RHCP The R value corresponding to the LHCP of the neighboring cell can be obtained from the signal quality Q of the neighboring cell obtained through cell measurement. meas,n And the R criterion calculation parameter Qoffset included in the cell parameter set. _LHCP and Qoffsettemp _LHCP The R value corresponding to the RHCP of a neighboring cell can be obtained based on the signal quality Q of the neighboring cell obtained through cell measurements. meas,n And the R criterion calculation parameter Qoffset included in the cell parameter set. _RHCPand Qoffsettemp _RHCP The specific calculation method can be referred to the foregoing, and will not be described here again.

[0188] The R value of the camping cell should be greater than or equal to the R value of the current serving cell. Specifically, the terminal selects the cell with the largest R value as the camping cell, and takes the polarization direction corresponding to the cell measurement parameter set used to obtain the R value as the polarization direction of the camping cell; or the terminal selects the cell with the largest RSRP from the neighboring cells with R values greater than or equal to the R value of the current serving cell as the camping cell, and takes the polarization direction corresponding to the cell measurement parameter set used to obtain the R value as the polarization direction of the camping cell; or the terminal selects the first neighboring cell with the R value greater than the R value of the current serving cell as the camping cell, and takes the polarization direction corresponding to the cell measurement parameter set used to obtain the R value as the polarization direction of the camping cell. Possibly, if the two R values of the first neighboring cell with the R value greater than the R value of the current serving cell are both greater than the R value of the serving cell, the polarization direction corresponding to the higher R value is taken as the polarization direction of the camping cell.

[0189] In a possible implementation, when the R value of the neighboring cell is equal to the R value of the current serving cell, the neighboring cell is determined as the camping cell, and the polarization direction corresponding to the R value is taken as the polarization direction of the camping cell; in another possible implementation, when the R value of the neighboring cell is equal to the R value of the current serving cell, the terminal continues to camp in the current serving cell. When the neighboring cell is a high-priority cell, the terminal obtains the S value corresponding to each polarization direction of each cell according to the measurement result of one or more cells and the cell measurement parameter set corresponding to each polarization direction of each cell, and compares the S value with a preset threshold corresponding to the different polarization directions of the high-priority cell in the cell measurement parameter set to determine the camping cell. The S value of the camping cell should be greater than the preset threshold. Specifically, when there are multiple cells with S values greater than the preset threshold, the cell with the largest S value is selected as the camping cell. Possibly, the S value of the camping cell can be equal to the preset threshold.

[0190] For example, two S values corresponding to LHCP and RHCP respectively are obtained for each cell, which are compared with the preset threshold of the high-priority cell corresponding to the different polarization directions in the cell measurement parameter set to determine the camping cell. For example, the S value can be Srxlev and / or Squal, and the specific calculation method of Srxlev and Squal can be referred to the foregoing, and will not be described here again. Comparing the S value with the preset threshold of the high-priority cell corresponding to the different polarization directions in the cell measurement parameter set specifically includes: comparing Srxlev corresponding to LHCP with the threshold value Thresh X_LHCP,HighQ in the cell measurement parameter set, and / or comparing Squal with the threshold value Thresh X_LHCP,HighPcomparing, and / or, Squal corresponding to the LHCP with a threshold value Thresh X_RHCP,HighQ comparing, and / or, Squal corresponding to the LHCP with a threshold value Thresh X_RHCP,HighP comparing.

[0191] When the neighbor cell is a low-priority cell, the terminal obtains S values corresponding to different polarization directions of one or more cells according to the measurement results of the one or more cells and the cell measurement parameter sets corresponding to different polarization directions of each cell, and compares the S values with preset thresholds corresponding to different polarization directions in the cell measurement parameter set to determine a camping cell. Specifically, when the S value of the serving cell is less than the preset threshold and the S value of the neighbor cell is greater than the preset threshold of the low-priority cell, the neighbor cell is selected as the camping cell. When there are multiple cells with S values greater than the preset threshold, the cell with the largest S value is selected as the camping cell. When the S value of the neighbor cell is equal to the preset threshold of the low-priority cell, the neighbor cell can be selected as the camping cell, or the terminal continues to camp on the current serving cell.

[0192] For example, two S values corresponding to the LHCP and RHCP of the serving cell are obtained, and are compared with the preset threshold. When the S values corresponding to the two polarization directions are both less than the preset threshold, S values corresponding to the LHCP and RHCP of the neighbor cell are obtained, and are compared with the preset threshold of the low-priority cell corresponding to different polarization directions to determine the camping cell. The S value can be Srxlev and / or Squal. The specific calculation method of Srxlev and Squal is described above, and will not be described here. Comparing the S value with the preset threshold of the low-priority cell in the cell measurement parameter set specifically includes: comparing Srxlev corresponding to the LHCP with a threshold value Thresh X_LHCP,LowQ comparing, and / or, Squal corresponding to the LHCP with a threshold value Thresh X_LHCP,LowP comparing, and / or, Squal corresponding to the LHCP with a threshold value Thresh X_RHCP,LowQ comparing, and / or, Squal corresponding to the LHCP with a threshold value Thresh X_RHCP,LowP comparing.

[0193] Figure 5 In the cell selection strategy shown in the figure, the network device issues different cell measurement parameter values for different polarization directions, so as to affect the determination of a more suitable camping cell and polarization direction when the terminal performs cell selection or reselection, and achieve load balancing of different polarization directions.

[0194] Referring to Figure 6 , Figure 6 An interaction diagram of a cell handover method provided by an embodiment of the present application. In this embodiment, when handover is triggered, the source network device sends indication information of the polarization direction of the target cell to the terminal, so that the terminal decides to access and reside in the specified polarization direction of the target cell according to the indication, thereby achieving load balancing in different polarization directions.

[0195] S601, measurement control and reporting

[0196] When the terminal is in a connected state, the first network device (such as a source gNB in Figure 6 ) sends measurement control information to the terminal, and correspondingly, the terminal receives the measurement control information issued by the first network device. The measurement control information is used to indicate the related configuration of measurement control.

[0197] The measurement control information is a unicast message, i.e., a UE-specific message.

[0198] In a possible implementation, the measurement control information includes polarization priority information.

[0199] In a possible implementation, the polarization priority information includes polarization priority information corresponding to LHCP and RHCP, and the priority information corresponding to different polarization directions has different values. Possibly, a high value indicates high priority, or a low value indicates low priority.

[0200] In another possible implementation, the polarization priority information is used to indicate the polarization direction with high priority. Specifically, the polarization priority information includes an identifier corresponding to LHCP or an identifier corresponding to RHCP. Alternatively, the network device and the terminal can be pre-agreed that “1” represents RHCP and “0” represents LHCP. If the priority of RHCP is higher, the value of the bit corresponding to the polarization priority is 1, and if the priority of LHCP is higher, the value of the bit corresponding to the polarization priority is 0. Alternatively, “1” can represent LHCP and “0” can represent RHCP, which is not limited in the present application.

[0201] In a possible implementation, the network device issues the measurement control information through RRC signaling. For example, the measurement control information is issued through an RRC connection reconfiguration (RRC Connection Reconfiguration) message.

[0202] After the terminal obtains the measurement control information, the terminal performs cell measurement according to the related configuration indicated by the measurement control information. This includes that the terminal performs cell measurement in the polarization direction with high polarization priority.

[0203] The terminal performs cell measurement, specifically, the terminal measures RSRP, reference signal received quality (RSRQ) or signal to interference plus noise ratio (SINR) of the current cell and neighboring cells.

[0204] When the measurement reporting condition is met, the terminal reports the measurement result to the first network device through an event, and correspondingly, the first network device receives the measurement result. The measurement reporting condition is the same as that in the prior art, and will not be described here.

[0205] S602, handover decision.

[0206] The first network device evaluates the measurement result reported by the terminal and decides whether to trigger handover.

[0207] S603, handover request.

[0208] If the result of the handover decision is to perform cell handover, a handover request is sent to the second network device (such as the target gNB in the first network device), and correspondingly, the second network device receives the handover request sent by the first network device. Figure 6

[0209] S604, admission control.

[0210] The second network device performs admission control and radio resource configuration after receiving the handover request.

[0211] S605, handover request confirmation.

[0212] After the second network device completes admission and radio resource configuration, a handover request confirmation message is fed back to the first network device, and correspondingly, the first network device receives the handover request confirmation message sent by the second network device.

[0213] S606, trigger handover.

[0214] The first network device triggers handover after receiving the handover request confirmation message sent by the second network device.

[0215] During the triggering of handover, the first network device sends a handover instruction to the terminal, and correspondingly, the terminal receives the handover instruction sent by the first network device. The handover instruction contains information related to the terminal accessing the second network device.

[0216] ​In a possible implementation, in a polarization multiplexing scenario, the switching instruction contains indication information of a polarization direction of a target cell accessed by the terminal. The terminal determines, according to the indication information, that the terminal should access and camp on a specified polarization direction of the target cell in the cell switching. For example, if the indication information indicates LHCP, the terminal accesses and camps on a left-hand circular polarization direction of the target cell, and if the indication information indicates RHCP, the terminal accesses and camps on a right-hand circular polarization direction of the target cell.

[0217] It should be noted that the polarization direction indicated in the switching instruction is determined according to load, power consumption and the like of different polarization directions of the target cell.

[0218] In a possible implementation, the indication information is carried in an RRC message. The indication information can also be carried in other UE-specific messages, which are not limited in the present application.

[0219] The switching instruction also contains an identifier of the target cell, a C-RNTI (Cell Access Radio Network Temporary Identifier) of the terminal, a random access resource and the like. The switching instruction can also contain other information, which is not limited in the present application.

[0220] S607, performing cell switching.

[0221] After the first network device triggers the cell switching, the cell switching is performed, and the specific process is similar to an existing cell switching process. For example, the terminal separates from a source cell and establishes synchronization with a target cell; the first network device sends user data to the second network device, and the user data includes both buffered user data and user data being transmitted; the second network device buffers the user data; and the terminal establishes synchronization with the target cell and completes the cell switching process.

[0222] In the above embodiments, the polarization priority information is carried in the measurement control information sent by the network device, and / or the polarization direction of the target cell is indicated to the terminal in the cell switching process, so that the different load balancing effect is achieved.

[0223] The above describes the method embodiments provided by the present application. In the embodiments, the dimension of the polarization direction is added to the cell selection strategy, the physical dimension of the cell selection is increased, the existing cell selection and reselection strategy is optimized, and a more suitable camping cell can be determined by the terminal.

[0224] To implement the functions in the methods provided in the embodiments of the present application, the terminal device and the network device can each include a hardware structure and / or a software module, and the functions are implemented in the form of hardware structure, software module, or hardware structure plus software module. Whether a certain function in the above functions is implemented in the form of hardware structure, software module, or hardware structure plus software module depends on specific application and design constraints of the technical solutions.

[0225] As shown in Figure 7 Based on the same technical concept, the embodiments of the present application also provide a communication apparatus 700. The communication apparatus 700 can be a terminal device or a network device, or an apparatus in the terminal device or the network device, or an apparatus that can be used in matching with the terminal device or the network device. In a possible implementation, the communication apparatus 700 can include a module or unit corresponding to each of the methods / operations / steps / actions performed by the terminal in the above method embodiments, which can be a hardware circuit, or software, or a combination of hardware circuit and software. In a possible implementation, the communication apparatus 700 can include a processing unit 710 and a transceiver unit 720. The processing unit 710 can be configured to invoke the transceiver unit 720 to perform the functions of receiving and / or transmitting.

[0226] When the communication apparatus 700 is used to perform the operations performed by the terminal, the transceiver unit 720 is configured to acquire polarization priority information of one or more cells, and the processing unit 710 is configured to perform cell measurement on the one or more cells according to the polarization priority information when a cell measurement condition is met, and determine a camping cell according to measurement results of the one or more cells.

[0227] When the communication apparatus 700 is used to perform the operations performed by the network device, the processing unit 710 is configured to determine polarization priority information, and the transceiver unit 720 is configured to send a first message containing the polarization priority information to the terminal, the polarization priority information being used to measure a cell to obtain a cell measurement result when a cell measurement condition is met, and the cell measurement result being used to select a camping cell of the communication apparatus.

[0228] The transceiver unit 720 is further configured to perform other receiving or transmitting steps or operations performed by the terminal and the network device in the above method embodiments. The processing unit 710 can be further configured to perform other corresponding steps or operations performed by the terminal and the network device in the above method embodiments, except for the receiving and transmitting, which will not be described here one by one.

[0229] The division of the modules in the embodiments of the present application is illustrative, and is merely a logical function division. Actual implementation can have another division manner. In addition, each function module or unit in each embodiment of the present application can be integrated in one processor, or can be a separate physical existence, or two or more modules or units can be integrated in one module or unit. The integrated module or unit can be realized in the form of hardware or in the form of a software function module.

[0230] participate Figure 8 The embodiments of the present application also provide a communication apparatus 800 for implementing the functions of the terminal device and the network device in the above method. The communication apparatus can be a terminal device, a network device, an apparatus in a terminal device or a network device, or an apparatus capable of being used in matching with a terminal device or a network device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. The communication apparatus 800 includes at least one processor 810 for implementing the functions of the terminal device and the network device in the method provided by the embodiments of the present application. The communication apparatus 800 can also include a communication interface 820. In the embodiments of the present application, the communication interface can be a transceiver, a circuit, a bus, a module or other types of communication interfaces, for communicating with other devices through a transmission medium. For example, the communication interface 820 is used for the apparatus in the communication apparatus 800 to communicate with other devices.

[0231] The processor 810 can perform the functions performed by the processing unit 710 in the communication apparatus 700; and the communication interface 820 can be used to perform the functions performed by the transceiver unit 720 in the communication apparatus 700.

[0232] When the communication apparatus 800 is used to perform the operations performed by the terminal, the communication interface 820 is used to acquire polarization priority information of one or more cells; and the processor 810 is used to perform cell measurement on the one or more cells according to the polarization priority information when a cell measurement condition is met, and determine a camping cell according to measurement results of the one or more cells.

[0233] When the communication apparatus 800 is used to perform the operations performed by the network device, the processor 810 is used to determine polarization priority information; and the communication interface 820 is used to send a first message containing the polarization priority information to a terminal, the polarization priority information being used to measure a cell to obtain a cell measurement result when a cell measurement condition is met; and the cell measurement result being used to select a camping cell of the communication apparatus.

[0234] The communication interface 820 is also used to execute other receiving or sending steps or operations performed by the terminal or network device in the above method embodiments. The processor 810 can also be used to execute other corresponding steps or operations performed by the terminal or network device in the above method embodiments, other than receiving and sending, which will not be described in detail here.

[0235] The communication device 800 may further include at least one memory 830 for storing program instructions and / or data. The memory 830 is coupled to the processor 810. The coupling in this embodiment is an indirect coupling or communication connection between devices, units, or modules, and may be electrical, mechanical, or other forms, for information exchange between devices, units, or modules. The processor 820 may operate in conjunction with the memory 830. The processor 810 may execute program instructions stored in the memory 830. In one possible implementation, at least one of the at least one memory may be integrated with the processor. In another possible implementation, the memory 830 is located outside the communication device 800.

[0236] This application embodiment does not limit the specific connection medium between the communication interface 820, the processor 810, and the memory 830. This application embodiment... Figure 8 The memory 830, processor 810, and communication interface 820 are connected via a bus 840. Figure 8 The connections between other components are shown in bold and are for illustrative purposes only, not as limiting information. The bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, Figure 8 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0237] In this embodiment, the processor 810 can be one or more central processing units (CPUs). When the processor 810 is a CPU, it can be a single-core CPU or a multi-core CPU. The processor 810 can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in this embodiment. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in this embodiment can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0238] The memory 830 in the embodiments of the present application can include, but is not limited to, a non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), a random access memory (RAM), an erasable programmable ROM (EPROM), a read-only memory (ROM), a compact disc read-only memory (CD-ROM), and the like. The memory is any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto. The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, used for storing program instructions and / or data. The memory 820 is used for related instructions and data.

[0239] participate Figure 9 The embodiments of the present application also provide a device 900 for realizing the functions of the terminal device and the network device in the above method. The device 900 can be a communication device or a chip in a communication device. The communication device includes:

[0240] at least one input / output interface 910 and a logic circuit 920. The input / output interface 910 can be an input / output circuit. The logic circuit 920 can be a signal processor, a chip, or other integrated circuits capable of realizing the method of the present application.

[0241] The at least one input / output interface 910 is used for input or output of signals or data. For example, when the device is a terminal or is used for a terminal, the input / output interface 910 is used to obtain a first message carrying polarization priority information and / or a set of cell measurement parameters. For another example, as shown in the method in the above embodiment, the input / output interface 910 is also used to output a cell measurement result to report the measurement result to a first network device. Figure 6 For example, when the device is a network device or is used for a network device, the input / output interface 910 is used to send a first message carrying polarization priority information and / or a set of cell measurement parameters to a terminal. For another example, as shown in the method in the above embodiment, the input / output interface 910 is also used to obtain a cell measurement result reported by a terminal. Figure 6 For another example, as shown in the method in the above embodiment, the input / output interface 910 is also used to obtain a cell measurement result reported by a terminal.

[0242] The logic circuit 920 is used to execute part or all steps of any method provided in the embodiments of the present application. The logic circuit can realize the functions of the processing unit 710 in the device 700 and the processor 810 in the device 800.

[0243] When the communication apparatus is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the method embodiments. The terminal device chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, and the information is sent by the network device to the terminal device; or the terminal device chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal device, and the information is sent by the terminal device to the network device.

[0244] When the communication apparatus is a chip applied to a network device, the network device chip implements the functions of the network device in the method embodiments. The network device chip receives information from other modules (such as a radio frequency module or an antenna) in the network device, and the information is sent by the terminal device to the network device; or the network device chip sends information to other modules (such as a radio frequency module or an antenna) in the network device, and the information is sent by the network device to the terminal device.

[0245] Based on the same idea as the above method embodiments, the embodiments of the present application also provide a computer readable storage medium, which stores a computer program, and the computer program is executed by hardware (such as a processor) to implement part or all steps of any method executed by any apparatus in the embodiments of the present application.

[0246] Based on the same idea as the above method embodiments, the embodiments of the present application also provide a computer program product including instructions, which, when executed on a computer, cause the computer to perform part or all steps of any method in the above aspects.

[0247] Based on the same idea as the above method embodiments, the present application also provides a chip or a chip system. The chip can include a processor. The chip can also include a memory (or a storage module) and / or a transceiver (or a communication module), or the chip is coupled with the memory (or the storage module) and / or the transceiver (or the communication module). The transceiver (or the communication module) can be used to support wired and / or wireless communication of the chip, and the memory (or the storage module) can be used to store a program, and the processor invoking the program can be used to implement operations performed by a terminal or a network device in the above method embodiments and any possible implementation manner of the method embodiments. The chip system can include the above chip, or can include the above chip and other discrete devices, such as the memory (or the storage module) and / or the transceiver (or the communication module).

[0248] Based on the same idea as the above method embodiments, the application further provides a communication system, which can include the above terminal and / or network device. The communication system can be used to implement the operations performed by the terminal or the network device in the above method embodiments or any possible implementation manner of the method embodiments. For example, the communication system can have the structure as shown in Figure 1 or Figure 2 .

[0249] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. 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 one website, computer, server, or data center to another website, computer, server, or data center through wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media sets. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as optical disk), or semiconductor media (such as solid-state disk), etc. In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0250] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0251] In several embodiments provided in the application, it should be understood that the disclosed apparatus can also be implemented by other means. For example, the apparatus embodiments described above are only schematic, and the division of the units is only a logical function division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the indirect coupling or direct coupling or communication connection between the units or components shown or discussed can be through some interfaces, indirect coupling or communication connection of the units or components, which can be electrical or other forms.

[0252] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e. may be located in one place, or may also be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the scheme of the embodiment.

[0253] The integrated units, if implemented in the form of software function units and sold or used as independent products, can be stored in a computer readable storage medium. Based on such understanding, the technical scheme of the present application essentially or the part that contributes to the prior art or the whole or part of the technical scheme can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present application.

[0254] The above is only some specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make other changes and modifications to these embodiments within the technical scope disclosed in the present application. Therefore, the appended claims are intended to include the above embodiments and any changes and modifications falling within the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that, include Receive measurement control information, which includes an identifier corresponding to left-hand circular polarization or a identifier corresponding to right-hand circular polarization; The measurement results are obtained by performing cell measurements based on the aforementioned measurement control information; The measurement results shall be reported when the conditions for a measurement report are met; Receive a handover command, the handover command being used to perform cell handover, the handover command including polarization direction indication information of the target cell; as well as Cell handover is performed according to the handover command.

2. The method according to claim 1, characterized in that, The polarization direction of the target cell includes at least one of the following: left-hand circular polarization and right-hand circular polarization.

3. The method according to claim 1 or 2, characterized in that, The polarization direction indication information of the target cell is carried in the radio resource control message.

4. The method according to any one of claims 1-3, characterized in that, The measurement and control information is carried in the radio resource control signaling.

5. The method according to any one of claims 1-4, characterized in that, The measurement control information is a user-specific (UE-specific) message.

6. The method according to any one of claims 1-5, characterized in that, The switching command is triggered in response to the measurement result.

7. The method according to any one of claims 1-6, characterized in that, The handover instruction also includes at least one of the following pieces of information related to the terminal accessing the target cell: The target cell identifier, the terminal's temporary cell wireless network identifier, or random access resources.

8. A communication method, characterized in that, include Send measurement control information, which includes an identifier corresponding to left-hand circular polarization or a identifier corresponding to right-hand circular polarization; Receive measurement results; the measurement results are obtained from cell measurements performed based on the measurement control information; as well as A handover command is sent to perform cell handover, and the handover command includes indication information of the polarization direction of the target cell.

9. The method according to claim 8, characterized in that, The polarization direction of the target cell includes at least one of the following: left-hand circular polarization and right-hand circular polarization.

10. The method according to claim 8 or 9, characterized in that, The polarization direction indication information of the target cell is carried in the radio resource control message.

11. The method according to any one of claims 8-10, characterized in that, The measurement and control information is carried in the radio resource control signaling.

12. The method according to any one of claims 8-11, characterized in that, The measurement control information is a user-specific (UE-specific) message.

13. The method according to any one of claims 8-12, characterized in that, The method further includes: Based on the measurement results, a cell handover will be performed. Send a handover request to the network equipment in the target cell, and receive a confirmation message for the handover request; The sending of the switching instruction includes: sending the switching instruction after receiving the confirmation message of the switching request.

14. The method according to any one of claims 8-13, characterized in that, The handover instruction also includes at least one of the following pieces of information related to the terminal accessing the target cell: The identifier of the target cell, the temporary identifier of the terminal's cell wireless network, or random access resources.

15. A communication device, characterized in that, Includes modules or units for performing the method as described in any one of claims 1 to 7.

16. A communication device, characterized in that, Includes modules or units for performing the method as described in any one of claims 8 to 14.

17. A communication device, characterized in that, Includes a processor for executing a computer program, which, when executed, causes the communication device to perform the method as described in any one of claims 1 to 7.

18. The communication device according to claim 17, characterized in that, It also includes a memory for storing the computer program.

19. A communication device, characterized in that, Includes a processor for executing a computer program, which, when executed, causes the communication device to perform the method as described in any one of claims 8 to 14.

20. The communication device according to claim 19, characterized in that, It also includes a memory for storing the computer program.

21. A computer-readable storage medium, characterized in that, A computer program is stored that, when run on a computer, causes the method of any one of claims 1 to 7 to be performed, or causes the method of any one of claims 8 to 14 to be performed.

22. A computer program product containing instructions, characterized in that, When it is run on a computer, it causes the method of any one of claims 1 to 7 to be performed, or causes the method of any one of claims 8 to 14 to be performed.

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