CN110831085A

CN110831085A - Communication method and device

Info

Publication number: CN110831085A
Application number: CN201810912037.XA
Authority: CN
Inventors: 陈磊; 郑黎丽; 李秉肇; 张宏平; 曾清海
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2020-02-21
Anticipated expiration: 2038-08-10
Also published as: CN110831085B

Abstract

The embodiment of the application discloses a communication method and equipment, which are used for avoiding a ping-pong effect and reducing the processing load of terminal equipment. The embodiment of the application provides a communication method, which comprises the following steps: the method comprises the steps that terminal equipment obtains at least one cell selection parameter, wherein the at least one cell selection parameter corresponds to at least one cell respectively; the terminal equipment determines a target cell according to the at least one cell selection parameter; wherein the target cell is a cell of the at least one cell, the target cell satisfying a cell selection criterion.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and device.

Background

A User Equipment (UE) has a plurality of states, including, for example: connected state, idle state, inactive state. The UE in idle state needs to complete the following procedures: public Land Mobile Network (PLMN) selection, cell selection or reselection, location registration, etc. Once the UE completes camping, the UE may read system messages (e.g., may obtain camping, access and reselection related information, location area information, etc.), read paging information, and initiate a connection establishment procedure. The S-criterion is followed for either cell selection or reselection.

When a UE performs cell reselection, the following solutions exist in the prior art: and the UE judges whether the reselection parameters broadcasted by the current service cell meet the S criterion or not, and reselects the target cell when the reselection parameters meet the S criterion. However, such prior art has the following drawbacks: if the UE reselects a target cell according to the reselection parameter, after reading the cell selection parameter of the target cell, if the cell selection parameter does not satisfy the S criterion of the target cell, the UE may be switched back to the original cell, thereby causing ping-pong (ping-pong) effect, causing cell reselection failure of the UE, and increasing the processing load of the UE.

Disclosure of Invention

The embodiment of the application provides a communication method and equipment, which are used for avoiding a ping-pong effect and reducing the processing load of terminal equipment.

In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:

in a first aspect, an embodiment of the present application provides a communication method, including: the method comprises the steps that terminal equipment obtains at least one cell selection parameter, wherein the at least one cell selection parameter corresponds to at least one cell respectively; the terminal equipment determines a target cell according to the at least one cell selection parameter; wherein the target cell is a cell of the at least one cell, the target cell satisfying a cell selection criterion.

In a second aspect, an embodiment of the present application provides a communication method, including: the network equipment configures at least one cell selection parameter, wherein the at least one cell selection parameter respectively corresponds to at least one cell; and the network equipment sends the at least one cell selection parameter to the terminal equipment.

In the embodiment of the present application, a terminal device first obtains at least one cell selection parameter, where the at least one cell selection parameter corresponds to at least one cell, and the terminal device determines a target cell according to the at least one cell selection parameter. The target cell is a cell in the at least one cell, and the target cell meets a cell selection criterion. Since at least one cell selection parameter corresponds to at least one cell in the embodiments of the present application, the cell selection parameter obtained by the terminal device is based on the cell level, and a target cell is determined according to the cell selection parameter configured for each cell, where the target cell is a cell that satisfies a cell selection criterion in the at least one cell. The target cell determined based on the cell selection parameters of the cell level meets the cell selection criterion, and when the terminal device selects or reselects the target cell, the ping-pong effect is not generated, so that the processing load of the terminal device is reduced.

In a possible design of the first aspect, the target cell is a cell of at least one neighboring cell, and the method further includes: and the terminal equipment determines to reselect the cell in the target cell.

The target cell determined by the terminal device is a candidate cell, and then the terminal device may perform cell reselection based on the target cell, and determine to reselect a cell in the target cell. For example, as shown below, when the target cell determined according to the cell selection criterion is multiple cells, a cell that can be reselected can be determined from the multiple target cells according to the cell reselection process, thereby solving the ping-pong effect existing in the cell reselection process in the prior art.

In a possible design of the first aspect or the second aspect, the cell selection parameter includes: a first parameter value and a second parameter value; the first parameter value is a value of the cell selection parameter when the terminal device does not support the auxiliary uplink SUL, and the second parameter value is a value of the cell selection parameter when the terminal device supports the SUL.

Each cell selection parameter of the at least one cell selection parameter may include two parameter values, which are respectively referred to as: the first parameter value and the second parameter value set values of corresponding cell selection parameters according to whether the terminal device supports the SUL, for example, the first parameter value may be Qrxlevmin, and the second parameter value may be qrxlevminssul. As can be seen from the foregoing description, in the embodiment of the present application, the cell selection parameter is at a cell level, and therefore the first parameter value and the second parameter value are also at a cell level.

In a possible design of the first aspect or the second aspect, the determining, by the terminal device, a target cell according to the at least one cell selection parameter includes: the terminal device determines whether the at least one cell meets the cell selection criterion according to the first parameter value, wherein the terminal device does not support the SUL; or, the terminal device determines whether the at least one cell meets the cell selection criterion according to the second parameter value, wherein the terminal device supports the SUL.

The network device may set a value of a corresponding cell selection parameter according to whether the terminal device supports the SUL, for example, the first parameter value may be Qrxlevmin, and the second parameter value may be QrxlevminSUL. As can be seen from the foregoing description, in the embodiment of the present application, the cell selection parameter is at a cell level, and therefore the first parameter value and the second parameter value are also at a cell level. The method comprises the steps that a set of parameters is configured for a cell managed by network equipment, so that a first parameter value and a second parameter value set for a cell level can reflect the parameter condition of the cell, and therefore terminal equipment can determine a target cell according to the first parameter value and the second parameter value set for the cell level.

In a possible design of the first aspect or the second aspect, the cell selection parameter further includes: the SUL frequency points corresponding to the at least one cell respectively; the terminal equipment determines a target cell according to the at least one cell selection parameter, and the method comprises the following steps: the terminal equipment determines whether the at least one cell meets the cell selection criterion by using the first parameter value, wherein the terminal equipment does not support the SUL frequency point of the at least one cell; or, the terminal device determines whether the at least one cell meets the cell selection criterion by using the second parameter value, wherein the terminal device supports the SUL frequency point of the at least one cell.

The network device may set a value of a corresponding cell selection parameter according to whether the terminal device supports the SUL frequency point corresponding to the cell, for example, the first parameter value may be Qrxlevmin, and the second parameter value may be Qrxlevmin SUL. As can be seen from the foregoing description, in the embodiment of the present application, the cell selection parameter is at a cell level, and therefore the first parameter value and the second parameter value are also at a cell level. The method comprises the steps that a set of parameters is configured for a cell managed by network equipment, so that a first parameter value and a second parameter value set for a cell level can reflect the parameter condition of the cell, and therefore terminal equipment can determine a target cell according to the first parameter value and the second parameter value set for the cell level.

In a possible design of the first aspect, the obtaining, by the terminal device, at least one cell selection parameter includes: the terminal equipment acquires a system message of the at least one cell sent by the network equipment, wherein the system message carries cell selection parameters respectively corresponding to the at least one cell; and the terminal equipment acquires the at least one cell selection parameter from the system message.

The network device and the terminal device may transmit information using a system message, for example, at least one cell selection parameter sent by the network device may be carried in the system message, and the terminal device may receive the system message from the network device by sending the at least one cell selection parameter through the system message, and may obtain the at least one cell selection parameter through the system message. Without limitation, other broadcast messages may be used to transmit information between the network device and the terminal device.

In a possible design of the first aspect, the obtaining, by the terminal device, at least one cell selection parameter includes: the terminal equipment receives a system message sent by network equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies; the system message further includes: configuring a cell selection parameter for a first cell, wherein the first cell is a cell in the at least one cell, and the cell selection parameter configured for the first cell is different from a cell selection parameter configured for a frequency in which the first cell is located; and the terminal equipment acquires the at least one cell selection parameter from the system message.

The network device may configure two different types of cell selection parameters, where one of the cell selection parameters is configured for different frequencies, that is, a cell selection parameter of a frequency level, and the other is a cell selection parameter of a cell level, and if the cell selection parameter of the cell level of a certain cell is the same as the cell selection parameter of the frequency level, the system message sent by the network device includes the cell selection parameter of the frequency level, and if the cell selection parameter of the cell level of a certain cell (for example, a first cell) is not the same as the cell selection parameter of the frequency level, the system message sent by the network device includes the cell selection parameter of the frequency level and also includes the cell selection parameter of the cell level. Therefore, the terminal device can receive the system message from the network device, and can acquire the at least one cell selection parameter through the system message. Without limitation, other broadcast messages may be used to transmit information between the network device and the terminal device.

In one possible design of the first aspect, the system message includes: the first SUL frequency point is one of all the SUL frequency points of the first cell, and the first SUL frequency point is different from the SUL frequency point corresponding to the downlink frequency of the first SUL frequency point in advance.

The SUL frequency points of the first cell are corresponding to one or more SUL frequency points in advance, and if the SUL frequency points corresponding to the downlink frequency points of the first SUL frequency points are different from the SUL frequency points corresponding to the downlink frequency points of the first SUL frequency points in advance, the first SUL frequency points need to be carried in the system message, so that after the system message is analyzed by the terminal equipment, all the SUL frequency points of the first cell can be acquired.

In a possible design of the first aspect, the obtaining, by the terminal device, at least one cell selection parameter includes: the terminal equipment receives a system message sent by network equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies and a cell offset value between a local cell where the terminal equipment is located and the at least one cell; the terminal device obtains the cell selection parameters respectively configured for different frequencies and the cell offset value from the system message; and the terminal equipment acquires the at least one cell selection parameter according to the cell selection parameters respectively configured for the different frequencies and the cell offset value.

The network device may configure cell selection parameters, that is, cell selection parameters of a frequency level, for different frequencies, in order to enable the terminal device to obtain the cell selection parameters of the cell level, the network device may further obtain a cell offset value between a local cell where the terminal device is located and at least one cell, where the cell offset value refers to an offset condition between two cells, for example, a cell offset value may be set between a cell a and a cell B, and the offset condition between the cell a and the cell B may be determined by using the cell offset value. The network device carries the cell selection parameter of the frequency level and the cell bias value in the system message, so that the terminal device can restore the cell selection parameter of the frequency level by using the cell selection parameter of the frequency level and the cell bias value. Therefore, the terminal device may receive a system message from the network device, and may obtain the at least one cell selection parameter through the system message. Without limitation, other broadcast messages may be used to transmit information between the network device and the terminal device.

In one possible design of the second aspect, the sending, by the network device, the at least one cell selection parameter to a terminal device includes: the network equipment sends a system message to the terminal equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies; the system message further includes: the method includes configuring cell selection parameters for a first cell, where the first cell is a cell in the at least one cell, and the cell selection parameters configured for the first cell are different from the cell selection parameters configured for a frequency where the first cell is located.

In one possible design of the second aspect, the sending, by the network device, the at least one cell selection parameter to a terminal device includes: the network equipment sends a system message to the terminal equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies and a cell offset value between a local cell where the terminal equipment is located and the at least one cell.

In a possible design of the first aspect or the second aspect, the cell bias value is further used for the terminal device to determine whether the at least one cell satisfies a cell ranking criterion.

When selecting or reselecting a cell, judging whether a target cell meets the cell selection criterion, except considering the cell selection parameter of the neighboring cell of the current service cell, and needing to consider the offset of different cells, in order to reduce the broadcast message overhead, using the Qoffset used for the cell ranking criterion currently in the system broadcast to represent the offset value of the cell, wherein the Qoffset parameter represents the cell offset between a local cell and the neighboring cell with the same frequency (or different frequency) for controlling the difficulty of cell reselection, and the larger the parameter value is, the harder the parameter value is to reselect the neighboring cell.

In a third aspect, an embodiment of the present application provides a terminal device, including: a parameter obtaining module, configured to obtain at least one cell selection parameter, where the at least one cell selection parameter corresponds to at least one cell respectively; a cell determining module, configured to determine a target cell according to the at least one cell selection parameter; wherein the target cell is a cell of the at least one cell, the target cell satisfying a cell selection criterion.

In a fourth aspect, an embodiment of the present application provides a network device, including: a parameter configuration module, configured to configure at least one cell selection parameter, where the at least one cell selection parameter corresponds to at least one cell respectively; a sending module, configured to send the at least one cell selection parameter to a terminal device.

In a possible design of the third aspect or the fourth aspect, the target cell is a cell of at least one neighboring cell, and the cell determining module is configured to determine a cell reselected to the target cell.

In a possible design of the third aspect or the fourth aspect, the cell selection parameter includes: a first parameter value and a second parameter value; the first parameter value is a value of the cell selection parameter when the terminal device does not support the auxiliary uplink SUL, and the second parameter value is a value of the cell selection parameter when the terminal device supports the SUL.

In a possible design of the third aspect or the fourth aspect, the cell determining module is configured to determine whether the at least one cell satisfies the cell selection criterion according to the first parameter value, where the terminal device does not support the SUL; or determining whether the at least one cell meets the cell selection criterion according to the second parameter value, wherein the terminal device supports the SUL.

In a possible design of the third aspect or the fourth aspect, the cell selection parameter further includes: the SUL frequency points corresponding to the at least one cell respectively; the cell determining module is configured to determine whether the at least one cell meets the cell selection criterion using the first parameter value, where the terminal device does not support a SUL frequency point of the at least one cell; or, determining whether the at least one cell meets the cell selection criterion by using the second parameter value, wherein the terminal device supports the SUL frequency point of the at least one cell.

In a possible design of the third aspect, the parameter obtaining module is configured to obtain a system message of the at least one cell sent by a network device, where the system message carries cell selection parameters respectively corresponding to the at least one cell; obtaining the at least one cell selection parameter from the system message.

In a possible design of the third aspect, the parameter obtaining module is configured to receive a system message sent by a network device, where the system message includes cell selection parameters respectively configured for different frequencies; the system message further includes: configuring a cell selection parameter for a first cell, wherein the first cell is a cell in the at least one cell, and the cell selection parameter configured for the first cell is different from a cell selection parameter configured for a frequency in which the first cell is located; obtaining the at least one cell selection parameter from the system message.

In one possible design of the third aspect, the system message includes: the first SUL frequency point is one of all the SUL frequency points of the first cell, and the first SUL frequency point is different from the SUL frequency point corresponding to the downlink frequency of the first SUL frequency point in advance.

In a possible design of the third aspect, the parameter obtaining module is configured to receive a system message sent by a network device, where the system message includes cell selection parameters respectively configured for different frequencies, and a cell offset value between a local cell where the terminal device is located and the at least one cell; acquiring the cell selection parameters respectively configured for different frequencies and the cell offset value from the system message; and acquiring the at least one cell selection parameter according to the cell selection parameters respectively configured for the different frequencies and the cell offset value.

In the third aspect of the present application, the constituent modules of the terminal device may further perform the steps described in the foregoing first aspect and various possible implementations, for details, see the foregoing description of the first aspect and various possible implementations.

In a possible design of the fourth aspect, the sending module is configured to send a system message to the terminal device, where the system message includes cell selection parameters configured for different frequencies respectively; the system message further includes: the method includes configuring cell selection parameters for a first cell, where the first cell is a cell in the at least one cell, and the cell selection parameters configured for the first cell are different from the cell selection parameters configured for a frequency where the first cell is located.

In a possible design of the fourth aspect, the sending module is configured to send a system message to the terminal device, where the system message includes cell selection parameters configured for different frequencies, respectively, and a cell offset value between a local cell where the terminal device is located and the at least one cell.

In a fourth aspect of the present application, the constituent modules of the network device may further perform the steps described in the foregoing second aspect and in various possible implementations, for details, see the foregoing description of the second aspect and in various possible implementations.

In a possible design of the third aspect or the fourth aspect, the cell bias value is further used for the terminal device to determine whether the at least one cell satisfies a cell ranking criterion.

In a fifth aspect, the present invention provides a computer-readable storage medium having stored therein instructions, which, when executed on a computer, cause the computer to perform the method of the first or second aspect.

In a sixth aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first or second aspect.

In a seventh aspect, an embodiment of the present application provides an apparatus, where the apparatus may include an entity such as a terminal device or a network device, and the apparatus includes: a processor. Optionally, the apparatus further comprises a memory. The memory is to store instructions; the processor is configured to execute the instructions in the memory to cause the apparatus to perform the method of any of the preceding first or second aspects.

In an eighth aspect, the present application provides a chip system, which includes a processor, for enabling a terminal device or a network device to implement the functions referred to in the above aspects, for example, to transmit or process data and/or information referred to in the above methods. In one possible design, the system-on-chip further includes a memory for storing necessary program instructions and data for the terminal device or the network device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

Drawings

Fig. 1 is a schematic diagram of a system architecture to which a communication method according to an embodiment of the present invention is applied;

fig. 2 is a schematic flow chart diagram of a communication method according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of another terminal device provided in the embodiment of the present application;

fig. 6 is a schematic structural diagram of another network device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described below with reference to the accompanying drawings.

The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely descriptive of the various embodiments of the application and how objects of the same nature can be distinguished. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical solution of the embodiment of the present application can be applied to a communication system, as shown in fig. 1, the communication system provided in the embodiment of the present application may at least include two communication devices, which are a network device and a terminal device, respectively. The network device may specifically include an Access Point (AP) or a base Station, and the terminal device may specifically include a Station (STA) or a UE. For the specific implementation manner of the communication device, the specific implementation manner may be flexibly selected in combination with the actual application scenario, which is not limited herein.

The technical scheme of the embodiment of the application can be applied to various data processing communication systems, such as: such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other systems. The term "system" may be used interchangeably with "network". CDMA systems may implement wireless technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA may include Wideband CDMA (WCDMA) technology and other CDMA variant technologies. CDMA2000 may cover the Interim Standard (IS) 2000(IS-2000), IS-95 and IS-856 standards. TDMA systems may implement wireless technologies such as global system for mobile communications (GSM). The OFDMA system may implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash OFDMA, etc. UTRA and E-UTRA are UMTS as well as UMTS evolved versions. Various versions of 3GPP in Long Term Evolution (LTE) and LTE-based evolution are new versions of UMTS using E-UTRA. The fifth Generation (5Generation, abbreviated as "5G") communication system, New Radio ("NR"), is the next Generation communication system under study.

In addition, the communication system can also be applied to future-oriented communication technologies, and all the technical solutions provided by the embodiments of the present application are applied. The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

Fig. 1 shows a schematic structural diagram of a possible Radio Access Network (RAN) according to an embodiment of the present application. The RAN may be a base station access system of a 2G network (i.e. the RAN comprises base stations and base station controllers), or may be a base station access system of a 3G network (i.e. the RAN comprises base stations and RNCs), or may be a base station access system of a 4G network (i.e. the RAN comprises enbs and RNCs), or may be a base station access system of a 5G network.

In the embodiment of the present application, a network device is specifically a base station, and a terminal device is specifically a UE. The network device may be any device with a wireless transceiving function, or a chip disposed in a specific device with a wireless transceiving function. The network devices include, but are not limited to: a base station (e.g. a base station BS, a base station NodeB, an evolved base station eNodeB or eNB, a base station gdnodeb or gNB in a fifth generation 5G communication system, a base station in a future communication system, an access node in a WiFi system, a wireless relay node, a wireless backhaul node), etc. The base station may be: macro base stations, micro base stations, pico base stations, small stations, relay stations, etc. A network, or future evolution network, in which multiple base stations may support one or more of the technologies mentioned above. The core network may support a network of one or more of the above mentioned technologies, or a future evolution network. A base station may contain one or more Transmission Receiving Points (TRPs) that are co-sited or non-co-sited. The network device may also be a wireless controller, a Centralized Unit (CU), a Distributed Unit (DU), or the like in a Cloud Radio Access Network (CRAN) scenario. The network device may also be a server, a wearable device, or a vehicle mounted device, etc. The following description will take a network device as an example of a base station. The multiple network devices may be base stations of the same type or different types. The base station may communicate with the terminal devices 1-6, and may also communicate with the terminal devices 1-6 through the relay station. The terminal devices 1-6 may support communication with multiple base stations of different technologies, for example, the terminal devices may support communication with a base station supporting an LTE network, may support communication with a base station supporting a 5G network, and may support dual connectivity with a base station of an LTE network and a base station of a 5G network. Such as a Radio Access Network (RAN) node that accesses the terminal to a wireless network. Currently, some examples of RAN nodes are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In one network configuration, a network device may include a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node.

A terminal device, also called a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), a terminal, etc., is a device for providing voice and/or data connectivity to a user, or a chip disposed in the device, such as a handheld device, a vehicle-mounted device, etc., which has wireless connectivity permission. Currently, some examples of terminal devices are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like.

In the embodiment of the present application, the base station and the UEs 1 to 6 form a communication system, in which the base station transmits one or more of a system message, a RAR message, and a paging message to one or more of the UEs 1 to 6, and the UEs 4 to 6 also form a communication system, in which the UE5 may be implemented as a function of the base station, and the UE5 may transmit one or more of a system message, control information, and a paging message to one or more of the

UEs

4 and 6.

The communication method provided by the embodiment of the application can be suitable for a cell selection process and a cell reselection process. Next, a detailed description will be given of a cell selection procedure provided in an embodiment of the present application.

The process that the UE in the idle state needs to complete includes: public land mobile network selection, cell selection/reselection, location registration, etc. Once camping is completed, the UE may read the system message, read the paging information, and initiate a connection establishment procedure. The cell selection types include initial cell selection and cell selection based on stored information. Whatever the cell selection type, the cell selection principle is followed, for example, the S criterion, and the cell selection is allowed to reside when the S value Srxlev >0 is selected. The S criteria are as follows:

Srxlev＝Qrxlevmeas–(Qrxlevmin+Qrxlevminoffset)-Pcompensation-Qoffsettem。

wherein, Qrxlevmeas is a Reference Signal Receiving Power (RSRP) value of the measurement cell;

the Qrxlevmin is the minimum RSRP receiving intensity requirement in the cell and is obtained from the broadcast message;

qrxlevmoffset is an offset value to the minimum access level value to prevent ping-pong reselection;

pcompensation is a compensation value, and is equal to MAX (Pemax-Pumax,0), i.e. the difference between the configuration value and the actual uplink transmission power of the UE is greater than 0. Herein, Pemax may be regarded as an uplink power threshold, and Pumax may be regarded as the transmission power of the UE, and if the transmission power of the UE is relatively low, a larger Qrxlevmeas is required at this time, and the UE can access the cell.

Qoffsettem is a temporary offset value, which is notified in the system broadcast.

The cell reselection procedure will be described in detail next. Cell reselection (cell reselection) refers to a process in which a UE selects a best cell to provide a service signal by monitoring signal qualities of a neighboring cell and a current cell in an idle mode. And when the signal quality and the level of the adjacent cell meet the S criterion and meet a certain reselection judgment criterion, the terminal is accessed to the cell to reside.

After the UE successfully resides, the cell measurement will be continued. A Radio Resource Control (RRC) layer calculates Srxlev (S criterion) according to an RSRP measurement result, and compares it with Sintrasearch (same frequency measurement start threshold) and Snonintrasearch (different frequency/different system measurement start threshold) as a judgment condition for whether to start neighbor measurement.

The cell reselection measurement criteria are as follows:

1. when the priority indicated by the system message is higher than the serving cell, the UE always performs measurements on these high priority cells;

2. for cells with same frequency/priority, if the serving cell is less than or equal to Sintrasearch (same frequency measurement starting threshold), the UE performs measurement, and the measurement is lower than the non-measurement;

3. when the system message indicates that the priority is lower than the serving cell, if the S value of the serving cell is less than or equal to Snonitras search (pilot frequency/inter-system measurement starting threshold), performing measurement, and the S value is greater than non-measurement;

4. and if the Snonintrasearch parameter is not broadcasted in the system message, the UE starts the inter-frequency cell measurement.

It should be noted that the S value is Srxlev (S criterion) in cell selection, and the formula: Srxlev-Qrxlevmeas- (QrxLevMin + qrxlevminiffset) -Pcompensation-qoffsetem, i.e. the S-criterion-the RSRP value of the measuring cell- { lowest reception level (typically 0-128dbm) + lowest reception level offset (typically 0) } -power offset (typically 0).

The cell reselection criterion is such that if a number of neighbouring cells on the highest priority are eligible, the best cell on the highest priority frequency is selected. For frequency points with the same priority (or the same frequency), a cell sorting criterion for reselecting cells with the same frequency, such as an R criterion, is adopted.

The cell reselection of the high-priority frequency point needs to meet the following conditions:

the time of the UE staying in the original cell exceeds 1 s;

2. the S-value of the high priority frequency cell is greater than a preset threshold (ThreshXHigh: high priority reselection threshold) and the duration exceeds the reselection time parameter T.

The cell reselection of frequency points with the same frequency or priority needs to meet the following conditions:

the time of the UE staying in the original cell exceeds 1 s;

2. the cells without high priority frequency meet the reselection requirement condition;

3. the S value of the same-frequency or same-priority cell is less than or equal to a preset threshold (Sintrasearch: same-frequency measurement starting threshold) and continuously meets the R criterion (Rt > Rs) in the T time.

The cell reselection of the low-priority frequency point needs to meet the following conditions:

1, the time that the UE resides in the original cell exceeds 1 s;

2. cells without high priority (or equal priority) frequencies meet reselection requirements;

3. the S value of the serving cell is less than a preset threshold (threshservlow: serving frequency point low priority reselection threshold), and the S value of the low priority frequency cell is greater than a preset threshold (ThreshXLow: low priority reselection threshold), and the duration exceeds the reselection time parameter value.

Next, a cell reselection priority processing principle is described, where the UE may acquire priority information (common priority) of a frequency point through a broadcast message, or acquire the priority information through an RRC connection release message. If a dedicated priority is provided in the message, the UE will ignore all common priorities. If the priority information of the cell where the UE currently resides is not provided in the system message, the UE sets the priority of the frequency point where the cell is located to be the lowest. And the UE performs cell reselection according to the priority strategy only among the frequency points which appear in the system message and provide the priority.

And the priority of the pilot frequency cell reselection is taken from 0 to 7, wherein 0 represents the lowest priority. In general, the priority of the inter-system 2G is 1, the priority of the 3G is 2, the priority of the 4G is 3(F band: 38400,38404,38350), the priority of the 4G is 5(D band: 37900,38098), and the priority of the 7(E band: 38950,39148).

Next, an example of a cell ranking criterion in the embodiment of the present application is given, such as an R criterion (duration of T time, Rt > Rs). And for cells with the same frequency or different frequencies but the same priority, the UE adopts the R criterion to reselect and sort the cells. The R criterion is that the target cell reselects to the target cell if Rt (target cell) continuously exceeds Rs (serving cell) within a reselection time threshold Treselection time (treselections of same frequency and different frequency may be different).

A serving cell: rs ═ Qmeas, s + Qhyst.

The target cell: rt is Qmeas, t-Qoffset.

Qmeas, s: and measuring the RSRP value of the cell.

Qhyst: a cell reselection hysteresis value.

Reselection delays of cells with the same frequency and priority are used for adjusting reselection difficulty and reducing ping-pong effect; and under the condition that other parameters are fixed, increasing the hysteresis, namely increasing the difficulty of the reselection of the same-frequency cells or different-frequency same-priority cells, and vice versa.

Qmeas, t: RSRP value of the target cell.

Qoffset: cell biasing.

Qoffset this parameter represents the cell offset between the local cell and the adjacent cells of the same frequency (or different frequency). The difficulty degree for controlling cell reselection is larger, and the more difficult the cell reselection is. When the parameter is configured to be not 0dB, the parameter is transmitted in a system message SIB3 (pilot frequency SIB 4); when the parameter is configured to be 0dB and is not transmitted in a system message SIB3 (pilot frequency SIB4), the UE processes according to the value of 0dB in reselection decision.

The larger the parameter setting, the less likely reselection is triggered; the smaller the parameter setting, the easier it is to trigger reselection. Too large or too small of this parameter setting will reduce the access success rate. (for same frequency only cell offset, for pilot frequency also add a pilot frequency offset, usually 0dB or 1 dB). The interface has a value range (+/-: 0,1,2,3,4,5,6,8,10,12,14,16,18,20,22,24) of 1dB, a suggested value of 0dB and a default value of 0 dB.

The inter-frequency/inter-system/different priority reselection procedure will be described next.

Snonintrasearch: the pilot frequency/pilot system measures the start-up threshold.

The parameter represents the inter-frequency/inter-system cell reselection measurement starting threshold. For the pilot frequency/pilot frequency system with the reselection priority greater than the service frequency point, the UE always starts measurement; for the pilot frequency with the reselection priority less than or equal to the service frequency point or the inter-system with the reselection priority less than the service frequency point, when the RRC layer calculates that Srxlev (S criterion) is greater than the value according to the RSRP measurement result, the UE does not need to start inter-frequency/inter-system measurement; when the RRC layer calculates Srxlev (S-criterion) less than or equal to the value according to the RSRP measurement result, the UE needs to start inter-frequency/inter-system measurement.

The interface value range is 0-31, the unit is 2 decibels, the recommended value is 9, the default value is 9, namely Srxlev (S criterion) > 18(9 x 2) dB, namely when the lowest receiving level is minus 128dbm (other is 0), the RSRP value of the UE pilot frequency/inter-system measurement starting threshold is smaller than or equal to minus 110dbm (-128dbm +18dB), namely pilot frequency/inter-system reselection measurement is started.

ThreshXHigh: a high priority reselection threshold.

If the priority of the target cell is higher than that of the current serving cell, and the S value of the target cell continuously exceeds a threshold parameter ThreshXHigh (inter-frequency point high priority reselection threshold) within the time reselection timer, the UE reselects the target cell regardless of the S value of the current cell. The interface value range is 0-31, and the unit is 2 decibels.

2.1 GERAN (2G) proposes a value of 7, and a default value of 7, i.e., when the lowest received level is-128 dbm (and the others are 0), the RSRP is greater than or equal to-114 dbm (-128dbm +14dB), and a high priority cell can be reselected.

2.2 UTRAN (3G) recommendation 6, default 6, i.e. when the lowest received level is-128 dbm (others are 0), RSRP is greater than or equal to-116 dbm (-128dbm +12dB), then a high priority cell can be reselected.

2.3 EUTRAN (4G) recommended value 11, default value 11, i.e. when the lowest received level is-128 dbm (others are 0), RSRP is greater than or equal to-106 dbm (-128dbm +12dB), then the high priority cell can be reselected.

ThrshServerLow: and (4) a service frequency point low priority reselection threshold.

The measurement threshold of the serving cell when the UE reselects a cell with a lower priority is defined, in which case the target cell must also satisfy a certain measurement threshold (threshXLow: low priority reselection threshold).

The interface value range is 0-31, the unit is 2 decibels, the recommended value is 7, the default value is 7, namely Srxlev (S criterion) > 14(7 x 2) dB, namely when the lowest receiving level is minus 128dbm (the others are 0), the service frequency point low priority reselection starting threshold RSRP value is smaller than or equal to minus 114dbm (-128dbm +14dB), namely, the service frequency point low priority reselection preparation is started, and if the target cell meets ThreshXLow priority reselection threshold value, reselection is executed.

ThreshXLow: a low priority reselection threshold.

If the priority of the target cell is lower than that of the current serving cell, the UE reselects to the target cell only if the S value of the serving cell is less than threshservlow (serving frequency point low priority reselection threshold, defined in SIB 3), and the S value of the target cell is greater than threshold parameter ThreshXLow (low priority reselection threshold), and the duration exceeds reselection timer.

The interface value range is 0-31, and the unit is 2 decibels.

4.1 GERAN (2G) recommended value 7, default value 7, Srxlev (S criteria) > 14(7 x 2) dB, i.e. when the lowest reception level is-128 dbm (others are 0), the target cell (2G) low priority reselection start threshold RSRP value is greater than or equal to-114 dbm (-128dbm +14dB) and the high priority serving cell has started low priority reselection measurement, i.e. reselected to this low priority cell.

4.2 UTRAN (3G) recommendation 6, default 6, RSRP greater than or equal to-116 dbm (-128dbm +12dB) and high priority serving cell has initiated a low priority reselection measurement, i.e., reselected to this low priority cell.

4.3 EUTRAN (4G) recommended value 11, default value 11, RSRP value greater than or equal to-106 dbm (-128dbm +22dB) and high priority serving cell has initiated low priority reselection measurement, i.e., reselected to this low priority cell.

Next, an example of an auxiliary Uplink (SUL) in the embodiment of the present application is described, where an NR system is poor in Uplink coverage due to a higher operating frequency and limited Uplink transmission power of a UE, and a SUL technology performs Uplink transmission of NR by using a frequency of LTE. If a cell supports the SUL, parameters related to the SUL will be broadcast in the system broadcast, and in addition, the UE capabilities are different and the frequency point support for the SUL is also different, i.e., the SUL frequency points of some cells are not supported by some UEs.

In the NR system message, a cell broadcasts a cell selection parameter of a current cell, such as Qrxlevmin, qrxlevmjnoffset, and QrxlevminSUL, and when the UE supports the SUL frequency point of the current cell, the QrxlevminSUL is used as an S criterion judgment, otherwise, the Qrxlevmin is used as an S criterion judgment. In addition, the cell may also broadcast cell reselection parameters, including carrier frequency level Qrxlevmin and QrxlevminSUL (carrier frequency level refers to a set of parameters for each carrier frequency, and does not particularly reflect the parameter condition of reselecting the cell), and cell level Qoffset, where Qoffset denotes the cell offset value between the local cell and the neighboring cells with the same frequency (or different frequency).

Referring to fig. 2, a schematic view of an interaction flow between a terminal device and a network device according to an embodiment of the present application is shown, where the communication method according to the embodiment of the present application mainly includes the following steps:

201. the network device configures at least one cell selection parameter, the at least one cell selection parameter corresponding to at least one cell, respectively.

In this embodiment, the network device manages at least one cell, and the network device may configure corresponding cell selection parameters for each cell, where the cell selection parameters at least include parameters for calculating the cell selection criterion when the target cell is determined. For example, the cell selection parameters may include parameters required for S-criteria calculation. In this embodiment, at least one cell selection parameter corresponds to at least one cell, and thus the network device is based on a cell level when configuring the cell selection parameter. That is, the network device may configure corresponding cell selection parameters for at least one cell. For example, in a cell reselection scenario, the network device may configure respective cell selection parameters for at least one neighboring cell, respectively. In a cell selection scenario, the network device may configure corresponding cell selection parameters for at least one serving cell, respectively.

For example, if the network device manages N cells, the network device may configure corresponding cell selection parameters according to the N cells, so as to obtain N cell selection parameters, where the N cell selection parameters are configured for the N cells, and a value of N is a positive integer. For example, the network device manages three cells, which are an a cell, a B cell, and a C cell, the network device may configure a cell selection parameter 1 for the a cell, a cell selection parameter 2 for the B cell, and a cell selection parameter 3 for the C cell.

202. The network device sends at least one cell selection parameter to the terminal device.

In this embodiment, a communication connection is established between the network device and the terminal device, so that after the network device generates at least one cell selection parameter, the network device may send the at least one cell selection parameter to the terminal device, and the terminal device may receive the at least one cell selection parameter through the communication connection. For example, the network device may configure cell selection parameter 1, cell selection parameter 2, and cell selection parameter 3, and the network device may send these 3 cell selection parameters to the terminal device, and then the terminal device may receive the 3 cell selection parameters, where the cell selection parameters are based on the cell level.

In some embodiments of the present application, step 202, the network device sends at least one cell selection parameter to the terminal device, including:

the network equipment sends system information to the terminal equipment, wherein the system information comprises cell selection parameters respectively configured for different frequencies;

the system message further includes: the cell selection parameter configured for the first cell is a cell in at least one cell, and the cell selection parameter configured for the first cell is different from the cell selection parameter configured for the frequency where the first cell is located.

In some embodiments of the present application, the system message sent by the network device includes: the first SUL frequency point is one of all the SUL frequency points of the first cell, and the SUL frequency points corresponding to the downlink frequency where the first SUL frequency point is located are different from the SUL frequency points corresponding to the downlink frequency where the first SUL frequency point is located.

The SUL frequency points of the first cell are corresponding to one or more SUL frequency points in advance, and if the SUL frequency points corresponding to the downlink frequency points of the first SUL frequency points are different from the SUL frequency points corresponding to the downlink frequency points of the first SUL frequency points in advance, the first SUL frequency points need to be carried in the system message, so that after the system message is analyzed by the terminal equipment, all the SUL frequency points of the first cell can be acquired. For example, the system message of the serving cell carries some SUL frequency points fhl corresponding to neighboring cells on the downlink frequency fDL, and if the SUL frequency point fhl 0 of a certain neighboring cell is different from the fhl corresponding to the downlink frequency fDL where the certain neighboring cell is located, the system message of the serving cell also carries the fhl 0 of the neighboring cell.

the network equipment sends a system message to the terminal equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies and a cell offset value between a local cell where the terminal equipment is located and at least one cell.

The network device may configure cell selection parameters, that is, cell selection parameters of a frequency level, for different frequencies, in order to enable the terminal device to obtain the cell selection parameters of the cell level, the network device may further obtain a cell offset value between a local cell where the terminal device is located and at least one cell, where the cell offset value refers to an offset condition between two cells, for example, a cell offset value may be set between a cell a and a cell B, and the offset condition between the cell a and the cell B may be determined by using the cell offset value.

The network device carries the cell selection parameter of the frequency level and the cell bias value in the system message, so that the terminal device can restore the cell selection parameter of the frequency level by using the cell selection parameter of the frequency level and the cell bias value. Therefore, the terminal device may receive a system message from the network device, and may obtain the at least one cell selection parameter through the system message. Without limitation, other broadcast messages may be used to transmit information between the network device and the terminal device.

In some embodiments of the present application, the cell offset value is further used for the terminal device to determine whether at least one cell satisfies the cell ranking criterion.

203. The terminal equipment acquires at least one cell selection parameter, and the at least one cell selection parameter corresponds to at least one cell respectively.

In this embodiment, a communication connection is established between the network device and the terminal device, and the network device may send at least one cell selection parameter to the terminal device, and then the terminal device may receive the at least one cell selection parameter through the communication connection.

For example, the network device may configure cell selection parameter 1, cell selection parameter 2, and cell selection parameter 3, and the network device may send these 3 cell selection parameters to the terminal device, and then the terminal device may receive the 3 cell selection parameters, where the cell selection parameters are based on the cell level.

In some embodiments of the present application, the cell selection parameters include: a first parameter value and a second parameter value;

the first parameter value is a value of a cell selection parameter when the terminal device does not support the auxiliary uplink SUL, and the second parameter value is a value of the cell selection parameter when the terminal device supports the SUL.

In some embodiments of the present application, the step 203 of the terminal device obtaining at least one cell selection parameter includes:

the method comprises the steps that terminal equipment obtains system information of at least one cell sent by network equipment, and the system information carries cell selection parameters respectively corresponding to the at least one cell;

the terminal equipment acquires at least one cell selection parameter from the system message.

the terminal equipment receives a system message sent by the network equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies;

the system message further includes: the method comprises the steps that cell selection parameters configured for a first cell are different from cell selection parameters configured for the frequency of the first cell, wherein the first cell is at least one cell in one cell;

the terminal equipment receives a system message sent by the network equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies and a cell offset value between a local cell where the terminal equipment is located and at least one cell;

the terminal equipment acquires cell selection parameters respectively configured for different frequencies and cell offset values from the system message;

the terminal equipment acquires at least one cell selection parameter according to the cell selection parameters respectively configured for different frequencies and the cell offset value.

204. And the terminal equipment determines the target cell according to the at least one cell selection parameter. The target cell is a cell in the at least one cell, and the target cell meets a cell selection criterion.

In this embodiment of the present application, at least one cell selection parameter acquired by the terminal device from the network device is allocated and configured by the network device for at least one cell, so that the network device may perform calculation of a cell selection criterion for the cell selection parameter corresponding to each cell to respectively determine whether the at least one cell satisfies the cell selection criterion, that is, the satisfying of the cell selection criterion may be determined as a target cell. And the terminal equipment determines a target cell according to the cell selection parameters configured by each cell, wherein the target cell is a cell which meets the cell selection criterion in at least one cell. The target cell determined based on the cell selection parameters of the cell level meets the cell selection criterion, and when the terminal device selects or reselects the target cell, the ping-pong effect is not generated, so that the processing load of the terminal device is reduced.

Optionally, in some embodiments of the present application, the target cell determined by the terminal device is one or more cells, that is, only when the cell selection parameter corresponding to the cell can meet the requirement of the cell selection criterion, the cell is determined as the target cell.

In some embodiments of the present application, the target cell is a cell in at least one neighboring cell, and the communication method provided in an embodiment of the present application further includes:

the terminal device determines to reselect to a cell among the target cells.

In step 204, the target cell determined by the terminal device is the candidate cell, and then the terminal device may perform cell reselection based on the target cell, and determine to reselect to a cell in the target cell. For example, as shown below, when the target cell determined according to the cell selection criterion is multiple cells, a cell that can be reselected can be determined from the multiple target cells according to the cell reselection process, thereby solving the ping-pong effect existing in the cell reselection process in the prior art.

In some embodiments of the present application, in a case that the cell selection parameter includes a first parameter value and a second parameter value, the step 204 of the terminal device determining the target cell according to at least one cell selection parameter includes:

the terminal equipment determines whether at least one cell meets a cell selection criterion according to the first parameter value, wherein the terminal equipment does not support the SUL; alternatively, the first and second electrodes may be,

and the terminal equipment determines whether at least one cell meets the cell selection criterion according to the second parameter value, wherein the terminal equipment supports the SUL.

For example, in the system message of NR, a cell may broadcast cell selection parameters of a current cell, such as Qrxlevmin and QrxlevminSUL, and when a UE supports a SUL frequency point of the current cell, the QrxlevminSUL is used for S criterion judgment, otherwise, the Qrxlevmin is used for S criterion judgment. In addition, the cell can also broadcast cell reselection parameters including cell level Qrxlevmin and QrxlevminSUL, wherein the cell level means that each cell is configured with a set of cell selection parameters, so that the parameter condition of reselected cells can be accurately reflected. And judging whether at least one cell meets the cell selection criterion according to different parameter values included in the cell selection parameters which can be selected by the terminal equipment according to whether the SUL is supported or not.

In some embodiments of the present application, in the case that the cell selection parameter includes a first parameter value and a second parameter value, the cell selection parameter may further include: and the SUL frequency points respectively correspond to at least one cell. That is, the first parameter value and the second parameter value may also be configured in the cell selection parameter sent by the network device according to whether the terminal device supports the SUL frequency point of the cell. Step 204, the terminal device determines a target cell according to at least one cell selection parameter, including:

the terminal equipment determines whether at least one cell meets a cell selection criterion or not by using the first parameter value, wherein the terminal equipment does not support the SUL frequency point of the at least one cell; alternatively, the first and second electrodes may be,

and the terminal equipment determines whether the at least one cell meets the cell selection criterion by using the second parameter value, wherein the terminal equipment supports the SUL frequency point of the at least one cell.

For example, in the system message of NR, a cell may broadcast cell selection parameters of a current cell, such as Qrxlevmin and QrxlevminSUL, and when a UE supports a SUL frequency point of the current cell, the QrxlevminSUL is used for S criterion judgment, otherwise, the Qrxlevmin is used for S criterion judgment. In addition, the cell can also broadcast cell reselection parameters including cell level Qrxlevmin and QrxlevminSUL, wherein the cell level means that each cell is configured with a set of cell selection parameters, so that the parameter condition of reselected cells can be accurately reflected. And judging whether at least one cell meets the cell selection criterion according to different parameter values included in the cell selection parameters which can be selected by the terminal equipment according to whether the SUL frequency points corresponding to the cells are supported by the terminal equipment.

As can be seen from the foregoing description of the embodiment, the terminal device first obtains at least one cell selection parameter, where the at least one cell selection parameter corresponds to at least one cell, and the terminal device determines the target cell according to the at least one cell selection parameter. The target cell is a cell in the at least one cell, and the target cell meets a cell selection criterion. Since at least one cell selection parameter corresponds to at least one cell in the embodiments of the present application, the cell selection parameter obtained by the terminal device is based on the cell level, and a target cell is determined according to the cell selection parameter configured for each cell, where the target cell is a cell that satisfies a cell selection criterion in the at least one cell. The target cell determined based on the cell selection parameters of the cell level meets the cell selection criterion, and when the terminal device selects or reselects the target cell, the ping-pong effect is not generated, so that the processing load of the terminal device is reduced.

In order to better understand and implement the above-described scheme of the embodiments of the present application, the following description specifically illustrates a corresponding application scenario.

The communication method provided by the embodiment of the application can solve the ping-pong effect problem during cell reselection. It may also be implemented to configure cell selection parameters based on the UE's support capability for the SUL at cell reselection. In the embodiment of the application, when the UE performs cell reselection, the S value of each neighboring cell is determined by using the parameters broadcast by the serving cell, but after a target cell is selected, before the target cell is reselected, the parameters of the target cell are read, the S value is recalculated, and the target cell is reselected only when the S criterion is satisfied. The method comprises the following steps that firstly, UE reads system information of an adjacent cell; secondly, the UE stores the system messages of certain cells or certain parameters in the system messages; thirdly, the UE requests the serving cell for system messages of a certain neighboring cell or certain parameters in the system messages, and the serving cell does not broadcast the messages in an on-demand request manner, that is, if the serving cell does not request the messages. Regardless of the three, the cell selection parameters for the UE to read the neighbor cell may include Qrxlevmin and QrxlevminSUL and two.

When a cell is reselected, considering the SUL frequency point of a target cell, and for UE with SUL capability, before reselecting, whether the SUL frequency point of the target cell is the SUL frequency point that the UE can support needs to be checked. For example, after the UE completes the cell reselection judgment, the UE is required to acquire the relevant information and perform the relevant judgment, and if the current serving cell broadcasts the SUL frequency point information of the neighboring cell, the UE needs to directly consider the cell reselection.

The serving cell broadcasts the minimum signal strength Qrxlevmin at the carrier frequency level of the neighboring cell, and also broadcasts some parameters at the cell level, for example, the serving cell directly broadcasts the cell selection parameters of the neighboring cell, which respectively include the minimum signal strength Qrxlevmin and parameters related to the SUL frequency point, or broadcasts the cell selection parameters different from the carrier frequency level. The serving cell broadcasts offset values of neighboring cells with respect to the carrier level cell selection parameters, which may directly use the Qoffset, and when the Qoffset cannot characterize this offset, a new offset value may be broadcasted. Cell selection parameters need to be exchanged between different cells, and whenever the cell selection parameters change, a neighboring cell needs to be notified through an exchange interface between the cells.

In one embodiment of the present application, the method mainly comprises the following steps:

step 1: and the UE determines the target cell sequence according to the cell reselection.

Step 2: reading system information of the target cell and obtaining Q of the target cell_rxlevmin/Q_rxlevminSUL。

And step 3: using Q if the UE supports SUL_rxlevminSULMaking S criterion judgment, if SUL is not supported, using Q_rxlevminAnd (5) judging the S criterion. The UE judges whether S criteria are met, and if yes, the target cell is reselected; if not, continuing to attempt reselection to the next cell in the cell list. And if no reselection cell meeting the requirement exists finally, indicating that the reselection operation is not executed.

As can be seen from the foregoing illustration, the embodiment of the present application can ensure that the target cell can meet the S criterion after the UE reselects the target cell.

In another embodiment of the present application, the method mainly comprises the following steps:

Step 2: reading system information of the target cell and obtaining Q of the target cell_rxlevmin/Q_rxlevminSULAnd the SUL frequency point of the target cell. The frequency point of the UE supporting the SUL is used for further judging the SUL supported by the UE, and two constraint conditions with different strengths can be seen.

And step 3: UE judges whether to support SUL frequency point of target cell, if soOn-hold use of Q_rxlevminSULMaking S criterion judgment, if not supported, using Q_rxlevminAnd (5) judging the S criterion. The UE judges whether S criterion is met or not, and if yes, the UE reselects the target cell; if not, continuing to attempt reselection to the next cell in the cell list. And if no reselection cell meeting the requirement exists finally, indicating that the reselection operation is not executed.

As can be seen from the foregoing illustration, the embodiment of the present application can ensure that before reselecting a target cell, the UE can know whether to support the SUL frequency point of the target cell.

step 0: the UE stores cell selection parameters of some cells, and the storage method may include the following two methods:

scheme 1:

when the UE determines a target cell based on the parameters broadcast by the serving cell, and finds that the target cell does not satisfy the S criterion after reselecting the target cell, the UE stores the system message of the target cell or some parameters in the system message, wherein the parameters at least comprise parameters for calculating the S value by cell reselection.

Scheme 2:

the UE may store the system message of the cell that was camped on or some parameters in the system message, including at least the parameters used for cell reselection calculation of the S value.

Step 2-a: if the UE stores the cell selection information of the target cell, proceed to step 3.

And step 3: using Q if the UE supports SUL_rxlevminSULMaking S criterion judgment, if SUL is not supported, using Q_rxlevminAnd (5) judging the S criterion. The UE judges whether S criteria are met, and if yes, the target cell is reselected; if not, continuing to attempt reselection to the next cell in the cell list. And if no reselection cell meeting the requirement exists finally, indicating that the reselection operation is not executed. Q_rxlevminSULAnd Q_rxlevminIs selected from the cell stored in step 2-aThe information is obtained.

Step 2-b: if the UE does not store the cell selection message of the target cell, proceed to step 4.

Step 4, the UE may execute the method in the foregoing embodiment, or may directly reselect to the target cell, that is, it is determined that the S criterion is satisfied, that is, it is determined whether the S criterion is satisfied by using the frequency level parameter.

As can be seen from the foregoing illustration, the embodiments of the present application may determine in advance whether the target cell meets the S criterion before reselecting to the target cell.

step 0: the UE stores cell selection parameters of some cells, including SUL frequency point information, and the storage method may include:

scheme 1:

Scheme 2:

Step 2-a: if the cell selection information of the target cell is stored in the UE, the step 3 is performed.

And step 3: UE judges whether to support SUL frequency point of target cell, if so, Q is used_rxlevminSULMaking S criterion judgment, if not supported, using Q_rxlevminAnd (5) judging the S criterion. The UE judges whether S criterion is met or not, and if yes, the UE reselects the target cell; if not, continuing to attempt reselection to the next cell in the cell list. And if no reselection cell meeting the requirement exists finally, indicating that the reselection operation is not executed.

As can be seen from the foregoing illustration, before reselecting a target cell, the UE in the embodiment of the present application can know whether to support the SUL frequency point of the target cell.

In another embodiment of the present application, after deciding the reselected target neighboring cell, the UE requests the serving cell for a system message or some parameters in the system message of the target neighboring cell, where the parameters at least include Q required for cell reselection_rxlevminAnd the UE recalculates the S value, meets the S criterion and reselects the target adjacent cell.

Minimum signal received strength value Q_rxlevminTwo values may be included, which are respectively used for the UE to support the SUL frequency point of the cell, or the UE does not support the SUL frequency point of the cell.

The method mainly comprises the following steps:

Step 2: requesting system information of target adjacent cell from current service cell, the system information contains cell reselection parameter, obtaining Q of target cell_rxlevmin/Q_rxlevminSUL。

As can be seen from the foregoing illustration, the embodiment of the present application ensures that the target cell can satisfy the S criterion after the UE reselects to the target cell.

In another embodiment of the present application, after deciding the reselected target neighboring cell, the SUL-capable UE requests the serving cell for a system message or some parameters in the system message of the target neighboring cell, where the parameters at least include: and when the UE supports the SUL frequency point of the target neighbor cell, reselecting the cell. When the UE does not support the SUL frequency point of the target neighboring cell, optionally, the UE may still reselect the cell when the calculated S value is greater than 0 using the Qrxlevmin value of the Qrxlevmin that is unrelated to the SUL, or may directly consider that the cell is not the reselected target cell. If the cell is not the reselection target cell, the next cell in the cell list is skipped to judge.

The method mainly comprises the following steps:

Step 2: requesting a system message of a target neighbor cell from a current serving cell, wherein the system message comprises cell reselection parameters and supported SUL frequency point information, and acquiring the Q of the target cell_rxlevmin/Q_rxlevminSUL。

And step 3: using Q if the UE supports the frequency point of SUL_rxlevminSULJudging S criteria, if not supporting SUL frequency point, using Q_rxlevminAnd (5) judging the S criterion. The UE judges whether S criteria are met, and if yes, the target cell is reselected; if not, continuing to attempt reselection to the next cell in the cell list. And if no reselection cell meeting the requirement exists finally, indicating that the reselection operation is not executed.

In another embodiment of the present application, the UE may obtain a cell (cell) -level Q of a neighboring cell from a serving cell_rxlevminSpecifically, the serving cell broadcasts a frequency-level neighbor Q_rxlevminIf Q (cell level) of a neighbor cell_rxlevminAnd Q of frequency stage_rxlevminIn contrast, the serving cell will also broadcast the (cell-level) Q of the neighbor cell_rxlevmin。

Cell level Q of a neighboring cell_rxlevminWhen the change occurs, the change needs to pass through the base stationAnd an interface for informing other cells.

Optionally, the minimum signal reception strength value Q_rxlevminTwo values may be included, which are respectively used for the UE to support the SUL frequency point of the cell, or the UE does not support the SUL frequency point of the cell.

The method mainly comprises the following steps:

step 0: the base station needs to broadcast the cell selection parameter Q of the adjacent cell level_rxlevmin/Q_rxlevminSULThere are two methods:

the method comprises the following steps: direct broadcast of Q of all neighbors_rxlevmin/Q_rxlevminSUL。

The method 2 comprises the following steps: q at the broadcast frequency level_rxlevmin/Q_rxlevminSULOn the basis, cell selection parameters of a cell level different from the frequency level are broadcast.

Step 1: and the UE determines the sequencing of the target cells (the cell reselection of the same frequency or the same priority frequency) according to the cell reselection, and the sequencing cells all meet the S criterion.

In addition to the foregoing step 0 and step 1, the following steps may be performed: when the QrxlevminSUL of the neighboring cell changes, other cells need to be notified through the inter-base station interface.

As can be seen from the foregoing illustration, the embodiment of the present application can ensure that the target cell can meet the S criterion after the UE reselects to the target cell.

step 0: the base station needs to broadcast the cell selection parameter Q of the adjacent cell level_rxlevmin/Q_rxlevminSULAnd SUL frequency points, there are two methods:

The method 2 comprises the following steps: q at the broadcast frequency level_rxlevmin/Q_rxlevminSULOn the basis, cell basic cell selection parameters other than frequency level are broadcast.

Step 1: UE determines the target cell sequence (cells with same frequency or same priority frequency) according to cell reselectionReselecting), the sequencing cells all meet the S criterion (whether the SUL frequency points are supported or not needs to be considered, and Q is selected_rxlevmin/Q_rxlevminSUL)。

The method specifically comprises the following schemes:

scheme 1:

frequency level Q for notifying neighbor cells in serving cell system message_rxlevminSULIf Q of a neighbor cell_rxlevminSULAnd the frequency of the frequency stage Q_rxlevminSULThe values are different, the service cell will be Q of the adjacent cell_rxlevminSULThe information is also carried in the broadcast information, which is convenient for the UE supporting the SUL to judge the S criterion. Specifically, Q of the neighboring cell may be carried_rxlevminSULAbsolute value or Q of the neighborhood_rxlevminSULFrequency level Q of frequency of the adjacent region_rxlevminSULThe difference of (a).

Scheme 2:

some downlink frequencies f are carried in the system message of the service cell_DLSUL frequency point f corresponding to upper neighbor cell_ULIf SUL frequency point f of a certain neighboring cell_UL0With its own downlink frequency f_DLUnify corresponding f_ULIf not, the system message of the service cell also carries the f of the neighboring cell_UL0The uniform mapping refers to predefined uplink frequency mapping.

Scheme 3:

signalling of some downlink frequencies f in system messages of a serving cell_DLQ of neighbor cell of (1)_rxlevminSULAnd SUL frequency point f_UL. If Q of a neighbor cell_rxlevminSULAnd the frequency of the frequency stage Q_rxlevminSULThe values are different, the service cell will be Q of the adjacent cell_rxlevminSULThe information is also carried in the broadcast information, and specifically, the Q of the neighboring cell may be carried_rxlevminSULAbsolute value or Q of the neighborhood_rxlevminSULFrequency level Q of frequency of the adjacent region_rxlevminSULThe difference of (a). If SUL frequency point f of a certain neighboring region_UL0With its own downlink frequency f_DLUnify corresponding f_ULIf not, the system message of the service cell also carries the f of the neighboring cell_UL0。

As can be seen from the foregoing illustration, the embodiment of the present application may provide the cell-level SUL information of the neighboring cell to the UE.

In another embodiment of the present application, when performing cell reselection, determining whether a target cell meets S-criteria, except that minimum signal strength of a carrier frequency level of a neighboring cell broadcasted by a current serving cell is considered, and offset of different cells needs to be considered, in order to reduce broadcast message overhead, Qoffset for R-criteria currently already in system broadcast is used to represent the offset, that is, when performing cell reselection, a UE determines that the S-criteria of the target cell is:

Srxlev＝Qrxlevmeas–(Qrxlevmin+Qrxlevminoffset+Qoffset)-Pcompensation-Qoffsettem。

step 0: the base station indicates the use of Qoffset as the S-criteria decision at the time of cell reselection, or provides a new offset for the S-criteria decision.

Step 1-a: judging an S criterion when the base station indicates to use Qoffset as cell reselection, determining the target cell sequencing by the UE according to the cell reselection, wherein the sequencing cells all meet the following S criterion and need to consider whether the SUL frequency point is supported or not, and selecting Q for use_rxlevmin/Q_rxlevminSUL，

Step 1-b: when the base station indicates to use the new offset, the UE determines the target cell sequence (cell reselection of the same frequency or the same priority frequency) according to the cell reselection, and the sequence cells all meet the following S criteria (whether the SUL frequency point is supported or not needs to be considered, and Q is selected for use_rxlevmin/Q_rxlevminSUL)

Srxlev＝Qrxlevmeas–(Qrxlevmin+Qrxlevminoffset+QoffsetNew)-Pcompensation-Qoffsettem。

In addition to the foregoing step 0 and step 1, the following steps may be performed: when the cell selection parameter of the neighboring cell changes, other cells need to be notified through the inter-base station interface.

As can be seen from the foregoing illustration, the embodiments of the present application can utilize existing elements in the system message to avoid the ping-pong effect during cell reselection.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

To facilitate better implementation of the above-described aspects of the embodiments of the present application, the following also provides relevant means for implementing the above-described aspects.

An embodiment of the present application provides a communication device, as shown in fig. 3, a terminal device 300, where the terminal device 300 includes:

a parameter obtaining module 301, configured to obtain at least one cell selection parameter, where the at least one cell selection parameter corresponds to at least one cell respectively;

a cell determining module 302, configured to determine a target cell according to the at least one cell selection parameter;

wherein the target cell is a cell of the at least one cell, the target cell satisfying a cell selection criterion.

An embodiment of the present application provides a communication device, as shown in fig. 4, a network device 400, where the network device 400 includes:

a parameter configuration module 401, configured to configure at least one cell selection parameter, where the at least one cell selection parameter corresponds to at least one cell respectively;

a sending module 402, configured to send the at least one cell selection parameter to a terminal device.

In some embodiments of the present application, the target cell is a cell of at least one neighboring cell, and the cell determining module is configured to determine a cell reselected to the target cell.

In some embodiments of the present application, the cell selection parameter includes: a first parameter value and a second parameter value;

the first parameter value is a value of the cell selection parameter when the terminal device does not support the auxiliary uplink SUL, and the second parameter value is a value of the cell selection parameter when the terminal device supports the SUL.

In some embodiments of the present application, the cell determining module 302 is configured to determine whether the at least one cell satisfies the cell selection criterion according to the first parameter value, wherein the terminal device does not support the SUL; or determining whether the at least one cell meets the cell selection criterion according to the second parameter value, wherein the terminal device supports the SUL.

In some embodiments of the present application, the cell selection parameter further includes: the SUL frequency points corresponding to the at least one cell respectively;

the cell determining module 302 is configured to determine whether the at least one cell meets the cell selection criterion using the first parameter value, where the terminal device does not support a SUL frequency point of the at least one cell; or, determining whether the at least one cell meets the cell selection criterion by using the second parameter value, wherein the terminal device supports the SUL frequency point of the at least one cell.

In some embodiments of the present application, the parameter obtaining module 301 is configured to obtain a system message of the at least one cell, where the system message carries cell selection parameters respectively corresponding to the at least one cell; obtaining the at least one cell selection parameter from the system message.

In some embodiments of the present application, the parameter obtaining module 301 is configured to receive a system message sent by a network device, where the system message includes cell selection parameters respectively configured for different frequencies; the system message further includes: configuring a cell selection parameter for a first cell, wherein the first cell is a cell in the at least one cell, and the cell selection parameter configured for the first cell is different from a cell selection parameter configured for a frequency in which the first cell is located; obtaining the at least one cell selection parameter from the system message.

In some embodiments of the present application, the system message comprises: the first SUL frequency point is one of all the SUL frequency points of the first cell, and the first SUL frequency point is different from the SUL frequency point corresponding to the downlink frequency of the first SUL frequency point in advance.

In some embodiments of the present application, the parameter obtaining module 301 is configured to receive a system message sent by a network device, where the system message includes cell selection parameters respectively configured for different frequencies, and a cell offset value between a local cell where the terminal device is located and the at least one cell; acquiring the cell selection parameters respectively configured for different frequencies and the cell offset value from the system message; and acquiring the at least one cell selection parameter according to the cell selection parameters respectively configured for the different frequencies and the cell offset value.

In some embodiments of the present application, the sending module 402 is configured to send a system message to the terminal device, where the system message includes cell selection parameters configured for different frequencies respectively; the system message further includes: the method includes configuring cell selection parameters for a first cell, where the first cell is a cell in the at least one cell, and the cell selection parameters configured for the first cell are different from the cell selection parameters configured for a frequency where the first cell is located.

In some embodiments of the present application, the sending module 402 is configured to send a system message to the terminal device, where the system message includes cell selection parameters configured for different frequencies respectively, and a cell offset value between a local cell where the terminal device is located and the at least one cell.

In some embodiments of the present application, the cell offset value is further used for the terminal device to determine whether the at least one cell satisfies a cell ranking criterion.

As shown in fig. 5, which is a schematic structural diagram of another device in the embodiment of the present application, the device is a terminal device, and the terminal device may include: a processor 131 (e.g., a CPU), a memory 132, a transmitter 134, and a receiver 133; the sender 134 and the receiver 133 are coupled to the processor 131, and the processor 131 controls the sending action of the sender 134 and the receiving action of the receiver 133. The memory 132 may comprise a high-speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored for performing various processing functions and implementing the method steps of the embodiments of the present application. Optionally, the terminal device related to the embodiment of the present application may further include: one or more of a power supply 135, a communication bus 136, and a communication port 137. The receiver 133 and the transmitter 134 may be integrated in a transceiver of the terminal device, or may be separate transmitting and receiving antennas on the terminal device. The communication bus 136 is used to enable communication connections between the elements. The communication port 137 is used for realizing connection and communication between the terminal device and other peripherals.

In the embodiment of the present application, the memory 132 is used for storing computer executable program codes, and the program codes include instructions; when the processor 131 executes the instruction, the instruction causes the processor 131 to execute the processing action of the terminal device in the foregoing method embodiment, and causes the transmitter 134 to execute the transmitting action of the terminal device in the foregoing method embodiment, which has similar implementation principle and technical effect, and is not described herein again.

As shown in fig. 6, which is a schematic structural diagram of another device in the embodiment of the present application, the device is a network device, and the network device may include: a processor (e.g., CPU)141, a memory 142, a receiver 143, and a transmitter 144; the receiver 143 and the transmitter 144 are coupled to the processor 141, and the processor 141 controls the receiving action of the receiver 143 and the transmitting action of the transmitter 144. The memory 142 may include a high-speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored for performing various processing functions and implementing the method steps of the embodiments of the present application. Optionally, the network device according to the embodiment of the present application may further include: one or more of a power supply 145, a communication bus 146, and a communication port 147. The receiver 143 and the transmitter 144 may be integrated in a transceiver of the network device, or may be separate transmitting and receiving antennas on the network device. The communication bus 146 is used to implement communication connections between the elements. The communication port 147 is used for connection and communication between the network device and other peripherals.

In the embodiment of the present application, the memory 142 is used for storing computer executable program codes, and the program codes include instructions; when the processor 141 executes the instruction, the instruction causes the processor 141 to execute the processing action of the network device in the foregoing method embodiment, and causes the transmitter 144 to execute the transmitting action of the network device in the foregoing method embodiment, which has similar implementation principle and technical effect, and is not described herein again.

In another possible design, when the communication device is a built-in chip of a terminal device or a network device, the chip includes: a processing unit, which may be for example a processor, and a communication unit, which may be for example an input/output interface, a pin or a circuit, etc. The processing unit can execute the computer execution instructions stored by the storage unit to enable the chip in the terminal to execute any one of the wireless communication methods. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the terminal, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like.

The processor mentioned in any of the above may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling execution of a program of the wireless communication method according to the first aspect.

It should be noted that the above-described embodiments of the apparatus are merely schematic, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiments of the apparatus provided in the present application, the connection relationship between the modules indicates that there is a communication connection therebetween, and may be implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus necessary general-purpose hardware, and certainly can also be implemented by special-purpose hardware including special-purpose integrated circuits, special-purpose CPUs, special-purpose memories, special-purpose components and the like. Generally, functions performed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same functions may be various, such as analog circuits, digital circuits, or dedicated circuits. However, for the present application, the implementation of a software program is more preferable. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk of a computer, and includes instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods described in the embodiments of the present application.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Claims

1. A method of communication, comprising:

the method comprises the steps that terminal equipment obtains at least one cell selection parameter, wherein the at least one cell selection parameter corresponds to at least one cell respectively;

the terminal equipment determines a target cell according to the at least one cell selection parameter;

2. A method of communication, comprising:

the network equipment configures at least one cell selection parameter, wherein the at least one cell selection parameter respectively corresponds to at least one cell;

and the network equipment sends the at least one cell selection parameter to the terminal equipment.

3. The method of claim 1, wherein the target cell is a cell of at least one neighboring cell, and wherein the method further comprises:

and the terminal equipment determines to reselect the cell in the target cell.

4. The method according to any of claims 1 to 3, wherein the cell selection parameters comprise: a first parameter value and a second parameter value;

5. The method of claim 4, wherein the determining, by the terminal device, the target cell according to the at least one cell selection parameter comprises:

the terminal device determines whether the at least one cell meets the cell selection criterion according to the first parameter value, wherein the terminal device does not support the SUL; alternatively, the first and second electrodes may be,

and the terminal equipment determines whether the at least one cell meets the cell selection criterion according to the second parameter value, wherein the terminal equipment supports the SUL.

6. The method of claim 4, wherein the cell selection parameter further comprises: the SUL frequency points corresponding to the at least one cell respectively;

the terminal equipment determines a target cell according to the at least one cell selection parameter, and the method comprises the following steps:

the terminal equipment determines whether the at least one cell meets the cell selection criterion by using the first parameter value, wherein the terminal equipment does not support the SUL frequency point of the at least one cell; alternatively, the first and second electrodes may be,

7. The method according to any one of claims 1 and 3 to 6, wherein the obtaining of the at least one cell selection parameter by the terminal device comprises:

the terminal equipment acquires a system message of the at least one cell sent by the network equipment, wherein the system message carries cell selection parameters respectively corresponding to the at least one cell;

and the terminal equipment acquires the at least one cell selection parameter from the system message.

8. The method according to any one of claims 1 and 3 to 6, wherein the obtaining of the at least one cell selection parameter by the terminal device comprises:

the terminal equipment receives a system message sent by network equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies;

the system message further includes: configuring a cell selection parameter for a first cell, wherein the first cell is a cell in the at least one cell, and the cell selection parameter configured for the first cell is different from a cell selection parameter configured for a frequency in which the first cell is located;

9. The method of claim 8, wherein the system message comprises: the first SUL frequency point is one of all the SUL frequency points of the first cell, and the first SUL frequency point is different from the SUL frequency point corresponding to the downlink frequency of the first SUL frequency point in advance.

10. The method according to any one of claims 1 and 3 to 6, wherein the obtaining of the at least one cell selection parameter by the terminal device comprises:

the terminal equipment receives a system message sent by network equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies and a cell offset value between a local cell where the terminal equipment is located and the at least one cell;

the terminal device obtains the cell selection parameters respectively configured for different frequencies and the cell offset value from the system message;

and the terminal equipment acquires the at least one cell selection parameter according to the cell selection parameters respectively configured for the different frequencies and the cell offset value.

11. The method according to any of claims 2 and 4-6, wherein the network device sends the at least one cell selection parameter to a terminal device, comprising:

the network equipment sends a system message to the terminal equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies;

the system message further includes: the method includes configuring cell selection parameters for a first cell, where the first cell is a cell in the at least one cell, and the cell selection parameters configured for the first cell are different from the cell selection parameters configured for a frequency where the first cell is located.

12. The method according to any of claims 2 and 4-6, wherein the network device sends the at least one cell selection parameter to a terminal device, comprising:

the network equipment sends a system message to the terminal equipment, wherein the system message comprises cell selection parameters respectively configured for different frequencies and a cell offset value between a local cell where the terminal equipment is located and the at least one cell.

13. The method of claim 10 or 12, wherein the cell offset value is further used for the terminal device to determine whether the at least one cell satisfies a cell ranking criterion.

14. A terminal device, comprising:

a parameter obtaining module, configured to obtain at least one cell selection parameter, where the at least one cell selection parameter corresponds to at least one cell respectively;

a cell determining module, configured to determine a target cell according to the at least one cell selection parameter;

15. A network device, comprising:

a parameter configuration module, configured to configure at least one cell selection parameter, where the at least one cell selection parameter corresponds to at least one cell respectively;

a sending module, configured to send the at least one cell selection parameter to a terminal device.

16. The apparatus of claim 14, wherein the target cell is a cell of at least one neighboring cell, and wherein the cell determination module is configured to determine a cell to reselect to the target cell.

17. The apparatus according to any of claims 14 to 16, wherein the cell selection parameters comprise: a first parameter value and a second parameter value;

18. The device of claim 17, wherein the cell determining module is configured to determine whether the at least one cell satisfies the cell selection criterion according to the first parameter value, wherein the terminal device does not support the SUL; or determining whether the at least one cell meets the cell selection criterion according to the second parameter value, wherein the terminal device supports the SUL.

19. The apparatus of claim 17, wherein the cell selection parameter further comprises: the SUL frequency points corresponding to the at least one cell respectively;

the cell determining module is configured to determine whether the at least one cell meets the cell selection criterion using the first parameter value, where the terminal device does not support a SUL frequency point of the at least one cell; or, determining whether the at least one cell meets the cell selection criterion by using the second parameter value, wherein the terminal device supports the SUL frequency point of the at least one cell.

20. The device according to any one of claims 14 and 16 to 19, wherein the parameter obtaining module is configured to obtain a system message of the at least one cell sent by a network device, where the system message carries cell selection parameters respectively corresponding to the at least one cell; obtaining the at least one cell selection parameter from the system message.

21. The device according to any one of claims 14 and 16 to 19, wherein the parameter obtaining module is configured to receive a system message sent by a network device, and the system message includes cell selection parameters configured for different frequencies respectively; the system message further includes: configuring a cell selection parameter for a first cell, wherein the first cell is a cell in the at least one cell, and the cell selection parameter configured for the first cell is different from a cell selection parameter configured for a frequency in which the first cell is located; obtaining the at least one cell selection parameter from the system message.

22. The apparatus of claim 21, wherein the system message comprises: the first SUL frequency point is one of all the SUL frequency points of the first cell, and the first SUL frequency point is different from the SUL frequency point corresponding to the downlink frequency of the first SUL frequency point in advance.

23. The device according to any one of claims 14 and 16 to 19, wherein the parameter obtaining module is configured to receive a system message sent by a network device, where the system message includes cell selection parameters configured for different frequencies, respectively, and a cell offset value between a home cell where the terminal device is located and the at least one cell; acquiring the cell selection parameters respectively configured for different frequencies and the cell offset value from the system message; and acquiring the at least one cell selection parameter according to the cell selection parameters respectively configured for the different frequencies and the cell offset value.

24. The device according to any of claims 15 and 17 to 19, wherein the sending module is configured to send a system message to the terminal device, and the system message includes cell selection parameters configured for different frequencies respectively; the system message further includes: the method includes configuring cell selection parameters for a first cell, where the first cell is a cell in the at least one cell, and the cell selection parameters configured for the first cell are different from the cell selection parameters configured for a frequency where the first cell is located.

25. The device according to any of claims 15 and 17 to 19, wherein the sending module is configured to send a system message to the terminal device, and the system message includes cell selection parameters configured for different frequencies respectively, and a cell offset value between a home cell where the terminal device is located and the at least one cell.

26. The apparatus of claim 23 or 25, wherein the cell offset value is further used for the terminal apparatus to determine whether the at least one cell satisfies a cell ranking criterion.

27. An apparatus, comprising a processor; wherein:

the processor, when executing program instructions stored in the memory, implements the method of any of claims 1, 3 to 10.

28. The apparatus of claim 27, further comprising the memory.

29. An apparatus, characterized in that the apparatus comprises a processor, wherein:

the processor, when executing program instructions stored in the memory, implements the method of any of claims 2, 4 to 6, 11 to 13.

30. A computer-readable storage medium comprising instructions which, when executed by one or more processors, implement the method of any one of claims 1-13.