CN110831085B - A communication method and device - Google Patents

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

A communication method and device

technical field

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

Background technique

User Equipment (User Equipment, UE) has multiple states, including, for example, a connected state, an idle state, and an inactive state. The UE in the idle state needs to complete the following procedures: public land mobile network (Public Land Mobile Network, PLMN) selection, cell selection or reselection, location registration, and the like. Once the UE completes camping, the UE can read system messages (for example, can obtain camping, access and reselection related information, location area information, etc.), read paging information, and initiate a connection establishment process. During cell selection or reselection, the S criterion must be followed.

When the UE performs cell reselection, there is a solution in the prior art as follows: the UE judges whether the reselection parameter broadcast by the current serving cell satisfies the S criterion, and reselects the target cell when the S criterion is met. However, this prior art has the following defects: if the UE reselects a target cell according to the reselection parameters, after reading the cell selection parameters of the target cell, if the cell selection parameters do not meet the S criterion of the target cell, this When the UE is switched back to the original cell, a ping-pong (ping-pong) effect will be caused, the cell reselection of the UE will fail, and the processing load of the UE will be increased.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a communication method and device, which are used to avoid the ping-pong effect and reduce the processing load of the terminal device.

In order to solve the above-mentioned technical problems, the embodiments of the present application provide the following technical solutions:

In a first aspect, an embodiment of the present application provides a communication method, including: a terminal device acquiring at least one cell selection parameter, the at least one cell selection parameter corresponding to at least one cell respectively; the terminal device selecting according to the at least one cell parameter, and determine a target cell; wherein, the target cell is a cell in the at least one cell, and the target cell satisfies the cell selection criterion.

In a second aspect, an embodiment of the present application provides a communication method, including: a network device configuring at least one cell selection parameter, the at least one cell selection parameter corresponding to at least one cell respectively; the network device sending the at least one cell selection parameter to a terminal device A cell selection parameter.

In this embodiment of the present application, the terminal device first acquires at least one cell selection parameter, the at least one cell selection parameter corresponds to at least one cell respectively, and the terminal device determines the target cell according to the at least one cell selection parameter. The target cell is a cell in at least one cell, and the target cell satisfies the cell selection criterion. Since at least one cell selection parameter in this embodiment of the present application corresponds to at least one cell, the cell selection parameter obtained by the terminal device is based on the cell level, and the target cell is determined according to the cell selection parameter configured for each cell, then the The target cell refers to a cell that satisfies the cell selection criterion in at least one cell. The target cell determined based on the cell selection parameters at the cell level satisfies the cell selection criteria. When the terminal equipment selects or reselects the target cell, the ping-pong effect will not occur, reducing the processing load of the terminal equipment.

In a possible design of the first aspect, the target cell is a cell in at least one adjacent cell, and the method further includes: determining, by the terminal device, to reselect a cell in the target cell.

Wherein, the target cell determined by the terminal device is a candidate cell, and then the terminal device may further perform cell reselection based on the target cell, and the terminal device determines the cell to be reselected in the target cell. An example is as follows, when the target cells determined according to the cell selection criteria are multiple cells, the cells that can be reselected can be determined from the multiple target cells according to the cell reselection process, thereby solving the problem of cell re-selection in the prior art. The ping-pong effect that exists in the selection process.

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

Wherein, each cell selection parameter in the at least one cell selection parameter may include two parameter values, which are respectively referred to as a first parameter value and a second parameter value, and the corresponding cell selection parameters are respectively set according to whether the terminal device supports SUL. For example, the first parameter value may be Qrxlevmin, and the second parameter value may be QrxlevminSUL. Based on the foregoing description, it can be known that the cell selection parameter in the embodiment of the present application is at the cell level, so the first parameter value and the second parameter value are also at the cell level.

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

Wherein, the network device may respectively set the value of the corresponding cell selection parameter according to whether the terminal device supports SUL. For example, the first parameter value may be Qrxlevmin, and the second parameter value may be QrxlevminSUL. Based on the foregoing description, it can be known that the cell selection parameter in the embodiment of the present application is at the cell level, so the first parameter value and the second parameter value are also at the cell level. A set of parameters is configured for the cell managed by the network device, so the first parameter value and the second parameter value set for the cell level can reflect the parameter situation of the cell, so that the terminal device can set the first parameter value and the second parameter value according to the cell level. The parameter value determines the target cell.

In a possible design of the first aspect or the second aspect, the cell selection parameter further includes: SUL frequency points corresponding to the at least one cell respectively; and the terminal device determines, according to the at least one cell selection parameter, a target cell, including: the terminal device uses the first parameter value to determine whether the at least one cell satisfies the cell selection criterion, wherein the terminal device does not support the SUL frequency of the at least one cell; or, The terminal device uses the second parameter value to determine whether the at least one cell satisfies the cell selection criterion, wherein the terminal device supports the SUL frequency of the at least one cell.

Wherein, the network device may respectively set the value of the 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 QrxlevminSUL. Based on the foregoing description, it can be known that the cell selection parameter in the embodiment of the present application is at the cell level, so the first parameter value and the second parameter value are also at the cell level. A set of parameters is configured for the cell managed by the network device, so the first parameter value and the second parameter value set for the cell level can reflect the parameter situation of the cell, so that the terminal device can set the first parameter value and the second parameter value according to the cell level. The parameter value determines the target cell.

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

Wherein, a system message can be used to transmit information between the network device and the terminal device. For example, at least one cell selection parameter sent by the network device can be carried in the system message, and the terminal device can send at least one cell selection parameter through the system message. The network device receives the system message, and can acquire at least one cell selection parameter through the system message. It is not limited that other broadcast messages may also be used to transmit information between the network device and the terminal device.

In a possible design of the first aspect, acquiring at least one cell selection parameter by the terminal device includes: receiving, by the terminal device, a system message sent by a network device, where the system message includes: cells respectively configured for different frequencies selection parameters; the system message further includes: cell selection parameters configured 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 the same as the cell selection parameters configured for the first cell The cell selection parameters of the frequency configuration where the first cell is located are different; the terminal device acquires the at least one cell selection parameter from the system message.

Among them, the network device can configure two different types of cell selection parameters, one of which is a cell selection parameter configured for different frequencies, that is, a cell selection parameter at the frequency level, and the other is a cell selection parameter at the cell level. The cell-level cell selection parameters of the cell are the same as the frequency-level cell selection parameters, and the system message sent by the network device includes the frequency-level cell selection parameters. If the cell-level cell selection parameters of a certain cell (such as the first cell) Different from the cell selection parameter at the frequency level, the system message sent by the network device includes the cell selection parameter at the frequency level and also includes the cell selection parameter at the cell level. Therefore, the terminal device can receive the system message from the network device, and can acquire at least one cell selection parameter through the system message. It is not limited that other broadcast messages may also be used to transmit information between the network device and the terminal device.

In a possible design of the first aspect, the system message includes: a first SUL frequency point, the first SUL frequency point is a SUL frequency point among all SUL frequency points of the first cell, and the first SUL frequency point is a SUL frequency point among all SUL frequency points of the first cell. A SUL frequency is different from the SUL frequency pre-corresponding to the downlink frequency where the first SUL frequency is located.

Wherein, the downlink frequency where the SUL frequency of the first cell is located corresponds to one or more SUL frequencies in advance. If the first SUL frequency is different from the SUL frequency pre-corresponding to the downlink frequency where the first SUL frequency is located, Then, the first SUL frequency point needs to be carried in the system message, so that after parsing the system message, the terminal device can obtain all the SUL frequency points of the first cell.

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

The network device can configure cell selection parameters for different frequencies, that is, the cell selection parameters at the frequency level. In order for the terminal device to obtain the cell selection parameters at the cell level, the network device can also obtain the local cell where the terminal device is located. The cell bias value between at least one cell. The cell bias value refers to the bias between two cells. For example, a cell bias value can be set between cell A and cell B, and the cell bias value can be used to determine The offset situation between cell A and cell B is obtained. The network device carries the cell selection parameters at the frequency level and the cell offset value in the system message, so that the terminal device can restore the cell selection parameters at the cell level from the cell selection parameters at the frequency level and the cell offset value. Therefore, the terminal device can receive the system message from the network device, and can acquire at least one cell selection parameter through the system message. It is not limited that other broadcast messages may also be used to transmit information between the network device and the terminal device.

In a possible design of the second aspect, the sending, by the network device, the at least one cell selection parameter to the terminal device includes: the network device sending a system message to the terminal device, where the system message includes: The cell selection parameters configured for the respective frequencies of the first cell; the system message further includes: cell selection parameters configured for the first cell, the first cell being a cell in the at least one cell, and the cell configured for the first cell The selection parameters are different from the cell selection parameters configured for the frequency in which the first cell is located.

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

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

Among them, during cell selection or reselection, to determine whether a target cell satisfies the cell selection criteria, in addition to considering the cell selection parameters of the neighboring cells of the current serving cell, it is also necessary to consider the offsets of different cells. In order to reduce the broadcast message overhead, use the current The Qoffset used for the cell sorting criterion already broadcasted in the system represents the offset value of this cell. The Qoffset parameter represents the cell offset between the local cell and the same-frequency (or inter-frequency) neighboring cells, which is used to control cell reselection The difficulty level of , the larger the parameter value, the more difficult it is to reselect to this neighborhood.

In a third aspect, an embodiment of the present application provides a terminal device, including: a parameter acquisition module, configured to acquire at least one cell selection parameter, the at least one cell selection parameter corresponding to at least one cell respectively; The at least one cell selection parameter determines a target cell; wherein the target cell is a cell in the at least one cell, and the target cell satisfies the 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 transmit to a terminal The device sends the at least one cell selection parameter.

In a possible design of the third aspect or the fourth aspect, the target cell is a cell in at least one adjacent cell, and the cell determination module is configured to determine a cell to be 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 when the terminal device does not support assisted uplink SUL The value of the cell selection parameter is the value of the cell selection parameter when the terminal device supports the SUL, and the second parameter value is the 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 determination 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 equipment The SUL is not supported; or, whether the at least one cell satisfies the cell selection criterion is determined 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: SUL frequency points corresponding to the at least one cell respectively; the cell determination module is configured to use the first parameter value to determine whether the at least one cell satisfies the cell selection criterion, wherein the terminal device does not support the SUL frequency of the at least one cell; or, use the second parameter value to determine whether the at least one cell satisfies the The cell selection criterion, wherein the terminal equipment supports the SUL frequency points of the at least one cell.

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

In a possible design of the third aspect, the parameter acquisition 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; the system message further includes : the cell selection parameter configured for the first cell, the first cell being a cell in the at least one cell, the cell selection parameter configured for the first cell and the cell configured for the frequency where the first cell is located The selection parameters are different; the at least one cell selection parameter is obtained from the system message.

In a possible design of the third aspect, the system message includes: a first SUL frequency point, the first SUL frequency point is a SUL frequency point among all SUL frequency points of the first cell, the first SUL frequency point A SUL frequency is different from the SUL frequency pre-corresponding to the downlink frequency where the first SUL frequency is located.

In a possible design of the third aspect, the parameter acquisition 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 the location where the terminal device is located. The cell offset value between the local cell and the at least one cell; the cell selection parameters configured for different frequencies and the cell offset value are obtained from the system message; The at least one cell selection parameter is obtained from the cell selection parameters separately configured for different frequencies and the cell offset value.

In the third aspect of the present application, the component modules of the terminal device may also perform the steps described in the foregoing first aspect and various possible implementation manners. For details, please refer to the foregoing first aspect and various possible implementation manners for details. illustrate.

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 cell selection parameter configured for the first cell, the first cell being a cell in the at least one cell, the cell selection parameter configured for the first cell and the cell configured for the frequency where the first cell is located The selection parameters are not the same.

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 the location where the terminal device is located. The cell offset value between the local cell and the at least one cell.

In the fourth aspect of the present application, the component modules of the network device may also perform the steps described in the foregoing second aspect and various possible implementation manners. For details, please refer to the foregoing second aspect and various possible implementation manners for details. illustrate.

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

In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium runs on a computer, the computer executes the first or second aspect described above. Methods.

In a sixth aspect, an embodiment of the present application provides a computer program product containing instructions, which, when executed on a computer, cause the computer to execute the method described in the first or second aspect above.

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 device further includes a memory. The memory is used to store instructions; the processor is used to execute the instructions in the memory, causing the apparatus to perform the method of any of the foregoing first or second aspects.

In an eighth aspect, the present application provides a chip system, the chip system includes a processor for supporting a terminal device or a network device to implement the functions involved in the above aspects, for example, sending or processing the data and data involved in the above method. / or information. In a possible design, the chip system further includes a memory, where the memory is used to store necessary program instructions and data of the terminal device or the network device. The chip system may be composed of chips, or may include chips and other discrete devices.

Description of drawings

1 is a schematic diagram of a system architecture to which a communication method provided by an embodiment of the present application is applied;

FIG. 2 is a schematic block diagram of a flowchart of a communication method provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of the composition and structure of a terminal device according to an embodiment of the present application;

FIG. 4 is a schematic diagram of the composition and structure of a network device according to an embodiment of the present application;

FIG. 5 is a schematic diagram of the composition and structure of another terminal device provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of the composition and structure of another network device according to an embodiment of the present application.

Detailed ways

Embodiments of the present application provide a communication method and device, which are used to avoid the ping-pong effect and reduce the processing load of the terminal device.

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

The terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is only a distinguishing manner adopted when describing objects with the same attributes in the embodiments of the present application. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, product or device comprising a series of elements is not necessarily limited to those elements, but may include no explicit or other units inherent to these processes, methods, products, or devices.

The technical solutions of the embodiments of the present application may be applied to a communication system. As shown in FIG. 1 , the communication system provided by the embodiments 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 (access point, AP) or a base station, and the terminal device may specifically include a station (Station, STA) or a UE. The specific implementation manner of the communication device can be flexibly selected in combination with actual application scenarios, which is not limited here.

The technical solutions of the embodiments of the present application can be applied to various data processing communication systems, for example, code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access ( 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" is interchangeable with "network". The CDMA system 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 variants. CDMA2000 can cover the interim standard (IS) 2000 (IS-2000), IS-95 and IS-856 standards. A TDMA system may implement wireless technologies such as global system for mobile communication (GSM). OFDMA systems can implement technologies such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDMA and other wireless technologies. UTRA and E-UTRA are UMTS and evolved versions of UMTS. Various releases of 3GPP in long term evolution (LTE) and based on LTE evolution are new releases of UMTS using E-UTRA. The fifth generation (5Generation, "5G") communication system and New Radio ("NR" for short) are the next generation communication systems under study.

In addition, the communication system may also be applicable to future-oriented communication technologies, and the technical solutions provided by the embodiments of the present application are all applicable. The system architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. The evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

FIG. 1 shows a schematic structural diagram of a possible radio access network (radio access network, RAN for short) according to an embodiment of the present application. The RAN may be a base station access system of a 2G network (ie, the RAN includes a base station and a base station controller), or may be a base station access system of a 3G network (ie, the RAN includes a base station and an RNC), or may be a 4G network The base station access system of the network (that is, the RAN includes the eNB and the RNC), or may be the base station access system of the 5G network.

In the embodiments of the present application, the network device is specifically a base station as an example, and the terminal device is specifically a UE as an example. The network device may be any device with a wireless transceiver function, or a chip provided in a specific wireless transceiver function device. The network equipment includes but is not limited to: base stations (such as base station BS, base station NodeB, evolved base station eNodeB or eNB, base station gNodeB or gNB in the fifth generation 5G communication system, base station in future communication system, connection in WiFi system. Ingress node, wireless relay node, wireless backhaul node), etc. The base station can be: a macro base station, a micro base station, a pico base station, a small base station, a relay station, and the like. Multiple base stations may support a network of one or more technologies mentioned above, or a future evolution network. The core network may support a network of one or more technologies mentioned above, or a future evolution network. A base station may include one or more co-sited or non-co-sited transmission receiving points (TRPs). The network device may also be a wireless controller, a centralized unit (centralized unit, CU), or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario. The network device can also be a server, a wearable device, or a vehicle-mounted device. The following description takes the network device as the base station as an example. The multiple network devices may be base stations of the same type, or may be base stations of different types. The base station can communicate with the terminal devices 1-6, and can also communicate with the terminal devices 1-6 through the relay station. Terminal devices 1-6 can support communication with multiple base stations of different technologies. For example, terminal devices can support communication with base stations that support LTE networks, can also support communication with base stations that support 5G networks, and can also support base stations that support LTE networks. And the dual connection of the base station of the 5G network. For example, a radio access network (RAN) node that accesses the terminal to the wireless network. At present, some examples of RAN nodes are: gNB, transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B) B, NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit) , BBU), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP) and so on. In a network structure, the network device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a RAN device including a CU node and a DU node.

Terminal equipment, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), terminal, etc., is a device that provides voice and/or data connectivity to users. The device, or a chip provided in the device, for example, a handheld device, a vehicle-mounted device, etc. with a wireless connection function. At present, some examples of terminal devices are: mobile phone (mobile phone), tablet computer, notebook computer, PDA, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) device, augmented Augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart grid wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and the like.

In this embodiment of the present application, the base station and UE1 to UE6 form a communication system, and in this communication system, the base station sends one or more of system messages, RAR messages and paging messages to one or more of UE1 to UE6 In addition, UE4 to UE6 also form a communication system. In this communication system, UE5 can function as a base station, and UE5 can send one or more of system messages, control information and paging messages to UE4 and UE5. One or more UEs in UE6.

The communication methods provided in the embodiments of the present application can be applied to a cell selection process, and can also be applied to a cell reselection process. Next, the cell selection process provided by the embodiments of the present application is first described in detail.

The processes that the UE in the idle state needs to complete include: public land mobile network selection, cell selection/reselection, location registration, and the like. Once camping is complete, the UE can read system messages, read paging information, and initiate a connection establishment procedure. The cell selection types include initial cell selection and cell selection based on stored information. Regardless of the type of cell selection, a cell selection principle, such as the S criterion, is required, and camping is allowed when the S value of cell selection Srxlev>0. The S criterion is as follows:

Srxlev=Qrxlevmeas−(Qrxlevmin+Qrxlevminoffset)−Pcompensation−Qoffsettem.

Wherein, Qrxlevmeas is the reference signal received power (Reference Signal Receiving Power, RSRP) value of the measurement cell;

Qrxlevmin is the minimum RSRP reception strength requirement in the cell, and the Qrxlevmin is obtained from the broadcast message;

Qrxlevminoffset is the offset value of the minimum access level value to prevent ping-pong reselection;

Pcompensation is a compensation value, which is equal to MAX(Pemax-Pumax, 0), that is, the difference between the configuration value and the actual transmission power of the UE, and 0, whichever is greater, takes the larger value. Among them, Pemax can be regarded as an uplink power threshold value, and Pumax can be regarded as the transmit power of the UE. If the transmit power of the UE is relatively small, a larger Qrxlevmeas is required at this time before the UE can access this cell.

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

Next, the cell reselection process will be described in detail. Cell reselection refers to a process in which the UE selects a best cell to provide a service signal by monitoring the signal quality of neighboring cells and the current cell in idle mode. When the signal quality and level of the neighboring cell satisfy the S criterion and satisfy a certain reselection decision criterion, the terminal will access the cell to camp.

After the UE successfully camps on, it will continue to measure the cell. The radio resource control (Radio Resource Control, RRC) layer calculates the Srxlev (S criterion) according to the RSRP measurement result, and compares it with Sintrasearch (same-frequency measurement start threshold) and Snonintrasearch (inter-frequency/different system measurement start threshold), as whether to start Decision condition for 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 the same-frequency/same-priority cell, if the serving cell is less than or equal to the Sintrasearch (same-frequency measurement start threshold), the UE performs measurement, and if the serving cell is lower than or equal to no measurement;

3. When the system message indicates that the priority is lower than that of the serving cell, if the S value of the serving cell is less than or equal to Snonintrasearch (inter-frequency/inter-system measurement start threshold), the measurement is performed, and the measurement is greater than no measurement;

4. If the Snonintrasearch parameter is not broadcast in the system message, the UE enables inter-frequency cell measurement.

It should be noted that the S value is the Srxlev (S criterion) in cell selection, and the formula is: Srxlev=Qrxlevmeas–(QrxLevMin+QrxLevMinOffset)–Pcompensation-Qoffsettem, that is, the S criterion=RSRP value of the measured cell–{minimum reception level (usually 0-128dbm) + minimum receive level offset (usually 0)} - power compensation (usually 0).

The cell reselection criterion is as follows: if multiple neighboring cells on the highest priority meet the conditions, the optimal cell on the highest priority frequency is selected. For frequencies of the same priority (or the same frequency), the cell sorting criterion for reselection of the same frequency cell, such as the R criterion, is adopted.

Cell reselection on high-priority frequencies must meet the following conditions:

1. The UE stays in the original cell for more than 1s;

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

The cell reselection of the same frequency or the same priority frequency must meet the following conditions:

1. The UE stays in the original cell for more than 1s;

2. Cells without high-priority frequencies meet the reselection requirements;

3. The S value of the same-frequency or same-priority cell is less than or equal to a preset threshold (Sintrasearch: intra-frequency measurement start threshold), and the R criterion (Rt>Rs) is continuously satisfied within the T time.

Cell reselection on low-priority frequencies must meet the following conditions:

1. The UE stays in the original cell for more than 1s;

2. Cells without high-priority (or equivalent priority) frequencies meet the reselection requirements;

3. The S value of the serving cell is less than the preset threshold (ThrshServLow: low priority reselection threshold for serving frequency points), and the S value of the low priority frequency cell is greater than the preset threshold (ThrshXLow: low priority reselection threshold) value), and the duration exceeds the reselection time parameter value.

Next, the cell reselection priority processing principle is described. The UE can obtain the priority information (common priority) of the frequency point through a broadcast message, or obtain it through an RRC connection release message. If dedicated priorities are provided in the message, the UE shall ignore all public priorities. If the priority information of the cell the UE is currently camping on is not provided in the system message, the UE will set the priority of the frequency point where the cell is located to the lowest. The UE performs cell reselection according to the priority policy only between the frequency points that appear in the system message and provide the priority.

The priority of inter-frequency cell reselection ranges from 0 to 7, where 0 represents the lowest priority. Usually, the priority of 2G in different systems is 1, 3G is 2, and 4G is 3 (F band: 38400, 38404, 38350), 5 (D band: 37900, 38098), 7 (E band: 38950, 39148).

Next, the cell sorting criterion in the embodiment of the present application is illustrated by an example, for example, the R criterion (continuous within T time, Rt>Rs). For intra-frequency cells or inter-frequency cells but with the same priority, the UE uses the R criterion to reselect and sort the cells. The R criterion is that within the reselection time threshold Treselection (intra-frequency and inter-frequency Treselection may be different), if Rt (target cell) continues to exceed Rs (serving cell), the UE will reselect to the target cell.

Serving cell: Rs=Qmeas,s+Qhyst.

Target cell: Rt=Qmeas,t−Qoffset.

Qmeas,s: measure the RSRP value of the cell.

Qhyst: Cell reselection hysteresis value.

The hysteresis of reselection of cells with the same frequency and the same priority is used to adjust the difficulty of reselection and reduce the ping-pong effect; if other parameters are constant, increase the hysteresis, that is, increase the difficulty of reselection of cells with the same frequency or different frequencies with the same priority ,vice versa.

Qmeas,t: RSRP value of the target cell.

Qoffset: cell offset.

Qoffset This parameter indicates the cell offset between the local cell and the same-frequency (or inter-frequency) neighboring cell. It is used to control the difficulty of cell reselection. The larger the parameter value is, the more difficult it is to reselect to this neighboring cell. When the parameter is configured to be non-0dB, it is sent in the system message SIB3 (inter-frequency SIB4); when the parameter is configured to 0dB, it is not sent in the system message SIB3 (inter-frequency SIB4), and the UE makes a reselection decision according to This value is processed at 0dB.

The larger this parameter is set, the harder it is to trigger the reselection; the smaller the parameter is set, the easier it is to trigger the reselection. If this parameter is set too large or too small, the access success rate will be reduced. (There is only a cell offset for the same frequency, and an inter-frequency frequency offset is added for the different frequency, usually 0dB or 1dB). Interface value range (±: 0, 1, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24), the unit is 1 dB, the recommended value is 0 dB, the default value 0dB.

Next, the inter-frequency/different-system/different-priority reselection process will be described.

1. Snonintrasearch: Inter-frequency/inter-system measurement start threshold.

This parameter indicates the start threshold of inter-frequency/inter-system cell reselection measurement. For inter-frequency/inter-system with reselection priority greater than service frequency, UE always starts measurement; When the Srxlev (S criterion) calculated by the RRC layer according to the RSRP measurement result is greater than this value, the UE does not need to initiate inter-frequency/inter-system measurement; Frequency/Differential System Measurements.

The interface value ranges from 0 to 31, the unit is 2 dB, the recommended value is 9, and the default value is 9, that is, Srxlev (S criterion) > 18 (9*2) dB, that is, when the minimum receiving level is -128dbm (others are 0 ), the UE inter-frequency/inter-system measurement start threshold RSRP value is less than or equal to -110dbm (-128dbm+18dB), that is, inter-frequency/inter-system reselection measurement is started.

2.ThreshXHigh: 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 continues to exceed the threshold parameter ThreshXHigh (inter-frequency high-priority reselection threshold) within the time ReselectionTimer, then the S value of the current cell will not matter. What is the value, the UE will reselect to the target cell. The interface value ranges from 0 to 31, and the unit is 2 dB.

2.1 The recommended value of GERAN (2G) is 7, the default value is 7, that is, when the minimum receiving level is -128dbm (others are 0), the RSRP is greater than or equal to -114dbm (-128dbm+14dB) to be reselected to a high-priority cell .

2.2 The recommended value of UTRAN (3G) is 6, the default value is 6, that is, when the minimum receiving level is -128dbm (others are 0), the RSRP is greater than or equal to -116dbm (-128dbm+12dB) to be reselected to a high-priority cell .

2.3 EUTRAN (4G) recommended value of 11, default value of 11, that is, when the minimum reception level is -128dbm (others are 0), the RSRP is greater than or equal to -106dbm (-128dbm+12dB) to be reselected to a high-priority cell .

3. ThrshServLow: low priority reselection threshold for service frequency points.

Defines the measurement threshold of the serving cell when the UE reselections a cell with a lower priority. In this case, the target cell must also meet a certain measurement threshold (threshXLow: low priority reselection threshold).

The interface value ranges from 0 to 31, the unit is 2 dB, the recommended value is 7, and the default value is 7, that is, Srxlev (S criterion) > 14 (7*2) dB, that is, when the minimum receiving level is -128dbm (others are 0 ), the service frequency low-priority reselection start threshold RSRP value is less than or equal to -114dbm (-128dbm+14dB), that is, the service frequency low-priority reselection preparation is started. If the target cell meets ThreshXLow (low-priority reselection threshold limit), that is, perform reselection.

4.ThreshXLow: low priority reselection threshold.

If the priority of the target cell is lower than that of the current serving cell, then only the S value of the serving cell is less than ThrshServLow (the low priority reselection threshold for service frequency points, defined in SIB3), and the S value of the target cell is greater than the threshold parameter ThreshXLow ( Low-priority reselection threshold), and the UE will reselection to the target cell only after the duration exceeds the ReselectionTimer.

The interface value ranges from 0 to 31, and the unit is 2 dB.

4.1 The recommended value of GERAN (2G) is 7, the default value is 7, that is, Srxlev (S criterion) > 14 (7*2) dB, that is, when the lowest receiving level is -128dbm (others are 0), the target cell (2G) If the low-priority reselection start threshold RSRP value is greater than or equal to -114dbm (-128dbm+14dB) and the high-priority serving cell has started low-priority reselection measurement, the low-priority cell can be reselected.

4.2 The recommended value of UTRAN (3G) is 6, the default value is 6, the RSRP value is greater than or equal to -116dbm (-128dbm+12dB) and the high-priority serving cell has started the low-priority reselection measurement, and the low-priority can be reselected community.

4.3 EUTRAN (4G) recommended value 11, default value 11, RSRP value is greater than or equal to -106dbm (-128dbm+22dB) and the high-priority serving cell has started low-priority reselection measurement, you can reselect to this low-priority community.

Next, the supplementary uplink (SUL) in the embodiment of the present application is illustrated as an example. Due to the high operating frequency of the NR system, the uplink transmission power of the UE is limited, resulting in poor uplink coverage. The SUL technology uses the LTE frequency to perform NR upstream transmission. If a cell supports SUL, the parameters related to SUL will be broadcast in the system broadcast. In addition, the UE has different capabilities, and the frequency support for SUL is also different. That is, the SUL frequency of some cells corresponds to some UEs. unsupported.

In the system message of NR, the cell will broadcast the cell selection parameters of the current cell, such as Qrxlevmin, Qrxlevminoffset, QrxlevminSUL, when the UE supports the SUL frequency of the current cell, use QrxlevminSUL for S criterion judgment, otherwise use Qrxlevmin for S criterion judgment. In addition, the cell also broadcasts cell reselection parameters, including Qrxlevmin and QrxlevminSUL at the carrier level (the carrier level refers to a set of parameters for each carrier frequency, which does not reflect the parameters of the reselection cell very well), and the cell-level Qoffset, Qoffset represents the cell offset value between the local cell and the same-frequency (or inter-frequency) neighboring cell.

Please refer to FIG. 2 , which is a schematic diagram of an interaction flow between a terminal device and a network device provided by an embodiment of the present application. The communication method provided by the embodiment of the present application mainly includes the following steps:

201. The network device configures at least one cell selection parameter, where the at least one cell selection parameter corresponds to at least one cell respectively.

In this embodiment of the present application, the network device manages at least one cell, and the network device can configure corresponding cell selection parameters for each cell, where the cell selection parameters at least include parameters used for calculating cell selection criteria when determining the target cell. For example, the cell selection parameters may include parameters required for the calculation of the S criterion. In this embodiment of the present application, at least one cell selection parameter corresponds to at least one cell, respectively, so the network device configures the cell selection parameter based on the cell level. That is, the network device may configure corresponding cell selection parameters for at least one cell respectively. For example, in a cell reselection scenario, the network device may configure corresponding cell selection parameters for at least one adjacent cell respectively. In the cell selection scenario, the network device may separately configure corresponding cell selection parameters for at least one serving cell.

An example is as follows, if the network device manages N cells, the network device can configure corresponding cell selection parameters according to the N cells, so that N cell selection parameters can be obtained, and the N cell selection parameters are obtained for the N cells. Configured, N is a positive integer. For example, if the network device manages three cells, namely, cell A, cell B, and cell C, the network device can configure cell selection parameter 1 for cell A, cell selection parameter 2 for cell B, and cell selection parameter 2 for cell C. Configure cell selection parameter 3.

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

In this embodiment of the present application, 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 can send at least one cell selection parameter to the terminal device, and the terminal device uses the communication The connection may receive at least one cell selection parameter. For example, the network device can configure cell selection parameter 1, cell selection parameter 2, and cell selection parameter 3. The network device can send these three cell selection parameters to the terminal device, and the terminal device can receive three cell selection parameters. The selection of parameters is based on the cell level.

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

The network device sends 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: a cell selection parameter configured for the first cell, which 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 .

Among them, the network device can configure two different types of cell selection parameters, one of which is a cell selection parameter configured for different frequencies, that is, a cell selection parameter at the frequency level, and the other is a cell selection parameter at the cell level. The cell-level cell selection parameters of the cell are the same as the frequency-level cell selection parameters, and the system message sent by the network device includes the frequency-level cell selection parameters. If the cell-level cell selection parameters of a certain cell (such as the first cell) Different from the cell selection parameter at the frequency level, the system message sent by the network device includes the cell selection parameter at the frequency level and also includes the cell selection parameter at the cell level. Therefore, the terminal device can receive the system message from the network device, and can acquire at least one cell selection parameter through the system message. It is not limited that other broadcast messages may also be used to transmit information between the network device and the terminal device.

In some embodiments of the present application, the system message sent by the network device includes: a first SUL frequency point, the first SUL frequency point is a SUL frequency point among all SUL frequency points in the first cell, and the first SUL frequency point is the same as the first SUL frequency point. The pre-corresponding SUL frequency points of the downlink frequency where a SUL frequency point is located are different.

Wherein, the downlink frequency where the SUL frequency of the first cell is located corresponds to one or more SUL frequencies in advance. If the first SUL frequency is different from the SUL frequency pre-corresponding to the downlink frequency where the first SUL frequency is located, Then, the first SUL frequency point needs to be carried in the system message, so that after parsing the system message, the terminal device can obtain all the SUL frequency points of the first cell. An example is as follows. The system message of the serving cell carries some SUL frequency points fUL corresponding to neighboring cells on the downlink frequency fDL. If the SUL frequency fUL0 of a neighboring cell is different from the fUL corresponding to the downlink frequency fDL where it is located, then The system message of the serving cell also carries the fUL0 of the neighboring cell.

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

The network device sends 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 the local cell where the terminal device is located and at least one cell.

The network device can configure cell selection parameters for different frequencies, that is, the cell selection parameters at the frequency level. In order for the terminal device to obtain the cell selection parameters at the cell level, the network device can also obtain the local cell where the terminal device is located. The cell bias value between at least one cell. The cell bias value refers to the bias between two cells. For example, a cell bias value can be set between cell A and cell B, and the cell bias value can be used to determine The offset situation between cell A and cell B is obtained.

The network device carries the cell selection parameters at the frequency level and the cell offset value in the system message, so that the terminal device can restore the cell selection parameters at the cell level from the cell selection parameters at the frequency level and the cell offset value. Therefore, the terminal device can receive the system message from the network device, and can acquire at least one cell selection parameter through the system message. It is not limited that other broadcast messages may also 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 also used by the terminal device to determine whether at least one cell satisfies the cell ranking criterion.

Among them, during cell selection or reselection, to determine whether a target cell satisfies the cell selection criteria, in addition to considering the cell selection parameters of the neighboring cells of the current serving cell, it is also necessary to consider the offsets of different cells. In order to reduce the broadcast message overhead, use the current The Qoffset used for the cell sorting criterion already broadcasted in the system represents the offset value of this cell. The Qoffset parameter represents the cell offset between the local cell and the same-frequency (or inter-frequency) neighboring cells, which is used to control cell reselection The difficulty level of , the larger the parameter value, the more difficult it is to reselect to this neighborhood.

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

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

For example, the network device can configure cell selection parameter 1, cell selection parameter 2, and cell selection parameter 3. The network device can send these three cell selection parameters to the terminal device, and the terminal device can receive three cell selection parameters. The selection of parameters is based on the cell level.

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

Wherein, each cell selection parameter in the at least one cell selection parameter may include two parameter values, which are respectively referred to as a first parameter value and a second parameter value, and the corresponding cell selection parameters are respectively set according to whether the terminal device supports SUL. For example, the first parameter value may be Qrxlevmin, and the second parameter value may be QrxlevminSUL. Based on the foregoing description, it can be known that the cell selection parameter in the embodiment of the present application is at the cell level, so the first parameter value and the second parameter value are also at the cell level.

In some embodiments of the present application, in step 203, the terminal device acquires at least one cell selection parameter, including:

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

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

Wherein, a system message can be used to transmit information between the network device and the terminal device. For example, at least one cell selection parameter sent by the network device can be carried in the system message, and the terminal device can send at least one cell selection parameter through the system message. The network device receives the system message, and can acquire at least one cell selection parameter through the system message. It is not limited that other broadcast messages may also be used to transmit information between the network device and the terminal device.

In some embodiments of the present application, in step 203, the terminal device acquires at least one cell selection parameter, including:

The terminal device receives a system message sent by the network device, where the system message includes: cell selection parameters configured for different frequencies respectively;

The system message further includes: a cell selection parameter configured for the first cell, which 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 ;

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

Among them, the network device can configure two different types of cell selection parameters, one of which is a cell selection parameter configured for different frequencies, that is, a cell selection parameter at the frequency level, and the other is a cell selection parameter at the cell level. The cell-level cell selection parameters of the cell are the same as the frequency-level cell selection parameters, and the system message sent by the network device includes the frequency-level cell selection parameters. If the cell-level cell selection parameters of a certain cell (such as the first cell) Different from the cell selection parameter at the frequency level, the system message sent by the network device includes the cell selection parameter at the frequency level and also includes the cell selection parameter at the cell level. Therefore, the terminal device can receive the system message from the network device, and can acquire at least one cell selection parameter through the system message. It is not limited that other broadcast messages may also be used to transmit information between the network device and the terminal device.

In some embodiments of the present application, the system message sent by the network device includes: a first SUL frequency point, the first SUL frequency point is a SUL frequency point among all SUL frequency points in the first cell, and the first SUL frequency point is the same as the first SUL frequency point. The pre-corresponding SUL frequency points of the downlink frequency where a SUL frequency point is located are different.

Wherein, the downlink frequency where the SUL frequency of the first cell is located corresponds to one or more SUL frequencies in advance. If the first SUL frequency is different from the SUL frequency pre-corresponding to the downlink frequency where the first SUL frequency is located, Then, the first SUL frequency point needs to be carried in the system message, so that after parsing the system message, the terminal device can obtain all the SUL frequency points of the first cell. An example is as follows. The system message of the serving cell carries some SUL frequency points fUL corresponding to neighboring cells on the downlink frequency fDL. If the SUL frequency fUL0 of a neighboring cell is different from the fUL corresponding to the downlink frequency fDL where it is located, then The system message of the serving cell also carries the fUL0 of the neighboring cell.

In some embodiments of the present application, in step 203, the terminal device acquires at least one cell selection parameter, including:

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

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

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

The network device can configure cell selection parameters for different frequencies, that is, the cell selection parameters at the frequency level. In order for the terminal device to obtain the cell selection parameters at the cell level, the network device can also obtain the local cell where the terminal device is located. The cell bias value between at least one cell. The cell bias value refers to the bias between two cells. For example, a cell bias value can be set between cell A and cell B, and the cell bias value can be used to determine The offset situation between cell A and cell B is obtained.

The network device carries the cell selection parameters at the frequency level and the cell offset value in the system message, so that the terminal device can restore the cell selection parameters at the cell level from the cell selection parameters at the frequency level and the cell offset value. Therefore, the terminal device can receive the system message from the network device, and can acquire at least one cell selection parameter through the system message. It is not limited that other broadcast messages may also 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 also used by the terminal device to determine whether at least one cell satisfies the cell ranking criterion.

Among them, during cell selection or reselection, to determine whether a target cell satisfies the cell selection criteria, in addition to considering the cell selection parameters of the neighboring cells of the current serving cell, it is also necessary to consider the offsets of different cells. In order to reduce the broadcast message overhead, use the current The Qoffset used for the cell sorting criterion already broadcasted in the system represents the offset value of this cell. The Qoffset parameter represents the cell offset between the local cell and the same-frequency (or inter-frequency) neighboring cells, which is used to control cell reselection The difficulty level of , the larger the parameter value, the more difficult it is to reselect to this neighborhood.

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

In this embodiment of the present application, the 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 the network device can perform cell selection with respect to the cell selection parameter corresponding to each cell Criteria are calculated to determine whether at least one cell satisfies the cell selection criteria, that is, the cell selection criteria can be determined as the target cell. The terminal device determines the target cell according to the cell selection parameter configured for each cell, where the target cell refers to a cell that satisfies the cell selection criterion in at least one cell. The target cell determined based on the cell selection parameters at the cell level satisfies the cell selection criteria. When the terminal equipment selects or reselects the target cell, the ping-pong effect will not occur, reducing the processing load of the terminal equipment.

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 requirements of the cell selection criterion, the cell will be determined. for the target area.

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

The terminal device determines which cell to reselect to the target cell.

Wherein, the target cell determined by the terminal device in the above step 204 is a candidate cell, and then the terminal device may further perform cell reselection based on the target cell, and the terminal device determines the cell to be reselected in the target cell. An example is as follows, when the target cells determined according to the cell selection criteria are multiple cells, the cells that can be reselected can be determined from the multiple target cells according to the cell reselection process, thereby solving the problem of cell re-selection in the prior art. The ping-pong effect that exists in the selection process.

In some embodiments of the present application, when the cell selection parameter includes the first parameter value and the second parameter value, step 204, the terminal device determines the target cell according to at least one cell selection parameter, including:

The terminal device determines whether at least one cell satisfies the cell selection criterion according to the first parameter value, wherein the terminal device does not support SUL; or,

The terminal device determines whether at least one cell satisfies the cell selection criterion according to the second parameter value, wherein the terminal device supports SUL.

Wherein, the network device may respectively set the value of the corresponding cell selection parameter according to whether the terminal device supports SUL. For example, the first parameter value may be Qrxlevmin, and the second parameter value may be QrxlevminSUL. Based on the foregoing description, it can be known that the cell selection parameter in the embodiment of the present application is at the cell level, so the first parameter value and the second parameter value are also at the cell level. A set of parameters is configured for the cell managed by the network device, so the first parameter value and the second parameter value set for the cell level can reflect the parameter situation of the cell, so that the terminal device can set the first parameter value and the second parameter value according to the cell level. The parameter value determines the target cell.

An example is as follows, in the system message of NR, the cell will broadcast the cell selection parameters of the current cell, such as Qrxlevmin, QrxlevminSUL, when the UE supports the SUL frequency of the current cell, use QrxlevminSUL as the S criterion, otherwise use Qrxlevmin as the S criterion judge. In addition, the cell also broadcasts cell reselection parameters, including Qrxlevmin and QrxlevminSUL at the cell level. The cell level means that each cell is configured with a set of cell selection parameters, so it can accurately reflect the parameters of the reselection cell. It is judged whether at least one cell satisfies the cell selection criterion according to whether the terminal equipment supports SUL and can select different parameter values included in the cell selection parameter.

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

The terminal device uses the first parameter value to determine whether the at least one cell satisfies the cell selection criterion, wherein the terminal device does not support the SUL frequency points of the at least one cell; or,

The terminal device uses the second parameter value to determine whether the at least one cell satisfies the cell selection criterion, wherein the terminal device supports the SUL frequency points of the at least one cell.

Wherein, the network device may respectively set the value of the 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 QrxlevminSUL. Based on the foregoing description, it can be known that the cell selection parameter in the embodiment of the present application is at the cell level, so the first parameter value and the second parameter value are also at the cell level. A set of parameters is configured for the cell managed by the network device, so the first parameter value and the second parameter value set for the cell level can reflect the parameter situation of the cell, so that the terminal device can set the first parameter value and the second parameter value according to the cell level. The parameter value determines the target cell.

An example is as follows, in the system message of NR, the cell will broadcast the cell selection parameters of the current cell, such as Qrxlevmin, QrxlevminSUL, when the UE supports the SUL frequency of the current cell, use QrxlevminSUL as the S criterion, otherwise use Qrxlevmin as the S criterion judge. In addition, the cell also broadcasts cell reselection parameters, including Qrxlevmin and QrxlevminSUL at the cell level. The cell level means that each cell is configured with a set of cell selection parameters, so it can accurately reflect the parameters of the reselection cell. According to whether the terminal device supports the SUL frequency point corresponding to the cell, different parameter values included in the cell selection parameter can be selected to determine whether at least one cell satisfies the cell selection criterion.

It can be known from the examples of the foregoing embodiments that the terminal device first obtains at least one cell selection parameter, the at least one cell selection parameter corresponds to at least one cell respectively, and the terminal device determines the target cell according to the at least one cell selection parameter. The target cell is a cell in at least one cell, and the target cell satisfies the cell selection criterion. Since at least one cell selection parameter in this embodiment of the present application corresponds to at least one cell, the cell selection parameter obtained by the terminal device is based on the cell level, and the target cell is determined according to the cell selection parameter configured for each cell, then the The target cell refers to a cell that satisfies the cell selection criterion in at least one cell. The target cell determined based on the cell selection parameters at the cell level satisfies the cell selection criteria. When the terminal equipment selects or reselects the target cell, the ping-pong effect will not occur, reducing the processing load of the terminal equipment.

In order to facilitate better understanding and implementation of the above solutions in the embodiments of the present application, specific descriptions are given below by taking corresponding application scenarios as examples.

The communication method provided in the embodiment of the present application can solve the problem of ping-pong effect during cell reselection. It is also possible to configure cell selection parameters based on the UE's support capability for SUL during cell reselection. In the embodiment of the present application, the UE uses the parameters broadcast by the serving cell to determine the S value of each neighboring cell when performing cell reselection, but after selecting a target cell, it reads the parameters of the target cell before reselection to the target cell , recalculate the S value, and reselect the target cell only when the S criterion is satisfied. There are three ways to read the parameters of the target cell. One is that the UE reads the system messages of the neighboring cells; the other is that the UE stores the system messages of some cells or some parameters in the system messages; the third is that the UE requests the serving cell The system messages of a certain neighbor cell or some parameters in the system messages are requested on-demand, that is, the serving cell will not broadcast these messages unless requested. Regardless of which of the above three types, the cell selection parameters for the UE to read the neighbor cell may include Qrxlevmin and QrxlevminSUL and two.

During cell reselection, consider the SUL frequency of the target cell. For UEs with SUL capability, before reselection, check whether the SUL frequency of the target cell is a SUL frequency that the UE can support. For example, the UE is required to obtain relevant information after completing the cell reselection judgment, and then make relevant judgments. Another example is that the current serving cell broadcasts the SUL frequency information of neighboring cells, which needs to be considered directly when performing cell reselection.

In addition to broadcasting the minimum signal strength Qrxlevmin at the carrier frequency level of the neighboring cell, the serving cell also broadcasts some parameters at the cell level. For example, the serving cell directly broadcasts the cell selection parameters of the neighboring cell, including the minimum signal strength Qrxlevmin and SUL frequency points. parameters, another example is to broadcast cell selection parameters different from the carrier frequency level. The serving cell broadcasts the offset values of neighboring cells relative to the carrier-level cell selection parameters. These offset values can directly use Qoffset. When Qoffset cannot represent the offset, a new offset value can be broadcast. The cell selection parameters need to be exchanged between different cells. Whenever the cell selection selection parameters are changed, the adjacent cells need to be notified through the exchange interface between the cells.

In an embodiment of the present application, it mainly includes the following steps:

Step 1: The UE determines the ranking of the target cells according to the cell reselection.

Step 2: Read the system message of the target cell, and obtain Q _rxlevmin /Q _rxlevminSUL of the target cell.

Step 3: If the UE supports SUL, it uses Q _rxlevminSUL to judge the S criterion, and if it does not support SUL, it uses Q _rxlevmin to judge the S criterion. The UE judges whether the S criterion is satisfied, and if it is satisfied, it will reselect the target cell; if it is not satisfied, it will continue to try to reselect the next cell in the cell list. If there is no reselection cell that meets the requirements at the end, it means that the reselection operation is not performed.

It can be seen from the foregoing examples that the embodiment of the present application can ensure that after the UE reselection to the target cell, the target cell can satisfy the S criterion.

In another embodiment of the present application, it mainly includes the following steps:

Step 1: The UE determines the ranking of the target cells according to the cell reselection.

Step 2: Read the system message of the target cell, obtain Q _rxlevmin/ Q _rxlevminSUL of the target cell, and the SUL frequency point of the target cell. The frequency points where the UE supports SUL is a further judgment of the UE supporting SUL, and it can be seen that there are two constraints with different strengths.

Step 3: The UE judges whether the SUL frequency of the target cell is supported, and if so, it uses Q _rxlevminSUL to judge the S criterion, and if not, it uses Q _rxlevmin to judge the S criterion. Next, the UE judges whether the S criterion is satisfied, and if it is satisfied, it reselects the target cell; if not, it continues to try to reselect the next cell in the cell list. If there is no reselection cell that meets the requirements at the end, it means that the reselection operation is not performed.

It can be seen from the foregoing examples that the embodiment of the present application can ensure that the UE can know whether to support the SUL frequency of the target cell before reselection to the target cell.

In another embodiment of the present application, it mainly includes the following steps:

Step 0: The UE stores cell selection parameters of some cells, and the storage methods can include the following two:

plan 1:

When the UE decides a target cell based on the parameters broadcast by the serving cell, and finds that the target cell does not meet the S criterion after reselection to the target cell, the UE stores the system message of the target cell or some parameters in the system message, and these parameters are at least Include parameters for calculating S value for cell reselection.

Scenario 2:

The UE may store the system message of the cell it once camped on or some parameters in the system message, and these parameters at least include parameters used for cell reselection to calculate the S value.

Step 1: The UE determines the ranking of the target cells according to the cell reselection.

Step 2-a: If the UE stores the cell selection information of the target cell, go to Step 3.

Step 3: If the UE supports SUL, it uses Q _rxlevminSUL to judge the S criterion, and if it does not support SUL, it uses Q _rxlevmin to judge the S criterion. The UE judges whether the S criterion is satisfied, and if it is satisfied, it will reselect the target cell; if it is not satisfied, it will continue to try to reselect the next cell in the cell list. If there is no reselection cell that meets the requirements at the end, it means that the reselection operation is not performed. Q _rxlevminSUL and Q _rxlevmin are obtained from the cell selection information stored in step 2-a.

Step 2-b: If the UE does not store the cell selection message of the target cell, go 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, the S criterion can be judged, that is, the frequency level parameter is used to judge whether the S criterion is met.

It can be seen from the foregoing examples that the embodiment of the present application can determine in advance whether the target cell satisfies the S criterion before reselection to the target cell.

In another embodiment of the present application, it mainly includes the following steps:

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

plan 1:

When the UE decides a target cell based on the parameters broadcast by the serving cell, and finds that the target cell does not meet the S criterion after reselection to the target cell, the UE stores the system message of the target cell or some parameters in the system message, and these parameters are at least Include parameters for calculating S value for cell reselection.

Scenario 2:

The UE may store the system message of the cell it once camped on or some parameters in the system message, and these parameters at least include parameters used for cell reselection to calculate the S value.

Step 1: The UE determines the ranking of the target cells according to the cell reselection.

Step 2-a: If the UE stores the cell selection information of the target cell, go to Step 3.

Step 3: The UE judges whether the SUL frequency of the target cell is supported, and if so, it uses Q _rxlevminSUL to judge the S criterion, and if not, it uses Q _rxlevmin to judge the S criterion. Next, the UE judges whether the S criterion is satisfied, and if it is satisfied, it reselects the target cell; if not, it continues to try to reselect the next cell in the cell list. If there is no reselection cell that meets the requirements at the end, it means that the reselection operation is not performed.

Step 2-b: If the UE does not store the cell selection message of the target cell, go 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, the S criterion can be judged, that is, the frequency level parameter is used to judge whether the S criterion is met.

It can be known from the foregoing examples that the UE in this embodiment of the present application can know whether to support the SUL frequency of the target cell before reselecting to the target cell.

In another embodiment of the present application, after determining the target neighbor cell for reselection, the UE requests the serving cell for a system message of the target neighbor cell or some parameters in the system message, and these parameters include at least the parameters required for cell reselection. Q _rxlevmin , the UE recalculates the S value, meets the S criterion, and then reselects to the target neighbor cell.

The minimum received signal strength value Q _rxlevmin may include two values, which are respectively used by the UE to support the SUL frequency of the cell, or the UE to not support the SUL frequency of the cell.

It mainly includes the following steps:

Step 1: The UE determines the ranking of the target cells according to the cell reselection.

Step 2: Request a system message of the target neighbor cell from the current serving cell, where the system message includes cell reselection parameters, and obtain Q _rxlevmin /Q _rxlevminSUL of the target cell.

Step 3: If the UE supports SUL, it uses Q _rxlevminSUL to judge the S criterion, and if it does not support SUL, it uses Q _rxlevmin to judge the S criterion. The UE judges whether the S criterion is satisfied, and if it is satisfied, it will reselect the target cell; if it is not satisfied, it will continue to try to reselect the next cell in the cell list. If there is no reselection cell that meets the requirements at the end, it means that the reselection operation is not performed.

It can be seen from the foregoing examples that the embodiment of the present application ensures that the target cell can satisfy the S criterion after the UE reselection to the target cell.

In another embodiment of the present application, after deciding the target neighbor cell for reselection, the UE with SUL capability requests the serving cell for the system message of the target neighbor cell or some parameters in the system message, and these parameters at least include: SUL Frequency information, when the UE supports the SUL frequency of the target neighboring cell, it will reselect to this cell. When the UE does not support the SUL frequency of the target neighboring cell, optionally, the UE can still reselect the cell when the S value calculated by using the Qrxlevmin value of Qrxlevmin that is independent of SUL is greater than 0, or it can be directly considered that the The cell is not the reselection target cell. Among them, if it is directly considered that it is not the target cell for reselection, the next cell in the cell list will be skipped for judgment.

It mainly includes the following steps:

Step 1: The UE determines the ranking of the target cells according to the cell reselection.

Step 2: Request a system message of the target neighbor cell from the current serving cell, where the system message includes cell reselection parameters and supported SUL frequency point information, and obtains Q _rxlevmin /Q _rxlevminSUL of the target cell.

Step 3: The UE uses Q rxlevminSUL to judge the S criterion if the frequency supports SUL, and uses Q _rxlevmin to _judge the S criterion if the frequency does not support SUL. The UE judges whether the S criterion is satisfied, and if it is satisfied, it will reselect the target cell; if it is not satisfied, it will continue to try to reselect the next cell in the cell list. If there is no reselection cell that meets the requirements at the end, it means that the reselection operation is not performed.

It can be known from the foregoing examples that the UE in this embodiment of the present application can know whether to support the SUL frequency of the target cell before reselecting to the target cell.

In another embodiment of the present application, the UE may obtain the cell-level Q _rxlevmin of the neighboring cell from the serving cell. Specifically, the serving cell will broadcast the frequency-level neighboring cell Q _rxlevmin . The (cell-level) Q _rxlevmin is different from the frequency-level Q _rxlevmin , and the serving cell also broadcasts the (cell-level) Q _rxlevmin of the neighboring cell.

When the cell-level Q _rxlevmin of adjacent cells changes, other cells need to be notified through the inter-base station interface.

Optionally, the minimum received signal strength value Q _rxlevmin may include two values, which are respectively used for the UE supporting the SUL frequency of the cell, or the UE not supporting the SUL frequency of the cell.

It mainly includes the following steps:

Step 0: The base station needs to broadcast the cell-level cell selection parameter Q _rxlevmin /Q _rxlevminSUL of adjacent cells. There are two methods:

Method 1: Directly broadcast Q _rxlevmin /Q _rxlevminSUL of all neighboring cells.

Method 2: On the basis of Q _rxlevmin /Q _rxlevminSUL at the broadcast frequency level, broadcast cell selection parameters at the cell level different from the frequency level.

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

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

It can be seen from the foregoing examples that the embodiments of the present application can ensure that the target cell can satisfy the S criterion after the UE reselection to the target cell.

In another embodiment of the present application, it mainly includes the following steps:

Step 0: The base station needs to broadcast the cell-level cell selection parameters Q _rxlevmin /Q _rxlevminSUL and SUL frequency points of adjacent cells. There are two methods:

Method 1: Directly broadcast Q _rxlevmin /Q _rxlevminSUL of all neighboring cells.

Method 2: On the basis of Q _rxlevmin /Q _rxlevminSUL at the broadcast frequency level, broadcast the basic cell selection parameters of cells different from the frequency level.

Step 1: The UE determines the ranking of the target cells according to the cell reselection (cell reselection of the same frequency or the same priority frequency), and the ranking cells all meet the S criterion (it needs to consider whether the SUL frequency is supported, and choose Q _rxlevmin /Q _rxlevminSUL ) .

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

Specifically, there are the following options:

plan 1:

In the system message of the serving cell, the frequency level Q _rxlevminSUL of the neighboring cell is notified. If the Q rxlevminSUL of a neighboring _{cell is different from the frequency level Q rxlevminSUL of} its frequency, the serving cell also carries the Q _rxlevminSUL information of the neighboring cell in the broadcast information. , which is convenient for UEs supporting SUL to judge the S criterion. Specifically, it may carry the absolute value of Q _rxlevminSUL of the adjacent cell or the difference between the Q _rxlevminSUL of the adjacent cell and the frequency level Q _rxlevminSUL of the frequency where the adjacent cell is located.

Scenario 2:

The serving cell system message carries some SUL frequencies f _UL corresponding to the neighboring cells on the downlink frequency f _DL . If the SUL frequency f _UL0 of a neighboring cell is different from the f _UL corresponding to the downlink frequency f _DL where it is located, then The serving cell system message also carries the f _UL0 of the neighboring cell, and the unified correspondence refers to the predefined uplink frequency correspondence.

Scenario 3:

In the serving cell system message, the Q _rxlevminSUL and SUL frequency points f _UL of some neighboring cells on the downlink frequency f _DL are notified. If the Q _rxlevminSUL of a neighboring cell is different from the frequency level Q _rxlevminSUL of its frequency, the serving cell also carries the Q _rxlevminSUL information of the neighboring cell in the broadcast information. Specifically, it can carry the absolute value of Q _rxlevminSUL of the neighboring cell. Or the difference between the Q _rxlevminSUL of the adjacent cell and the frequency level Q _rxlevminSUL of the frequency where the adjacent cell is located. If the SUL frequency f _UL0 of a neighboring cell is different from the f _UL uniformly corresponding to the downlink frequency f _DL where it is located, the serving cell system message also carries the f _UL0 of the neighboring cell.

It can be known from the foregoing examples that the embodiments of the present application can provide the UE with cell-level SUL information of the neighboring cells.

In another embodiment of the present application, during cell reselection, to determine whether a target cell satisfies the S criterion, in addition to considering the minimum signal strength of the adjacent carrier frequency level broadcast by the current serving cell, it is also necessary to consider the offset of different cells , in order to reduce the broadcast message overhead, the Qoffset for the R criterion that is currently broadcast in the system is used to represent this offset, that is, during cell reselection, the S criterion for the UE to determine the target cell is:

Srxlev=Qrxlevmeas−(Qrxlevmin+Qrxlevminoffset+Qoffset)−Pcompensation−Qoffsettem.

Step 0: The base station instructs to use the Qoffset as the S criterion for judging the cell reselection, or provides a new offset for the S criterion judgment.

Step 1-a: When the base station instructs the use of Qoffset as the cell reselection, the S criterion is judged, and the UE determines the target cell ranking according to the cell reselection. _rxlevmin /Q _rxlevminSUL ,

Srxlev=Qrxlevmeas−(Qrxlevmin+Qrxlevminoffset+Qoffset)−Pcompensation−Qoffsettem.

Step 1-b: When the base station instructs to use a new offset, the UE determines the target cell ranking according to the cell reselection (cell reselection of the same frequency or the same priority frequency), and the ranking cells all meet the following S criteria (SUL frequency points need to be considered) Whether to support, but choose to use Q _rxlevmin /Q _rxlevminSUL )

Srxlev=Qrxlevmeas−(Qrxlevmin+Qrxlevminoffset+QoffsetNew)−Pcompensation−Qoffsettem.

In addition to the foregoing steps 0 and 1, the following steps may also be performed: when the cell selection parameters of adjacent cells change, other cells need to be notified through the inter-base station interface.

It can be seen from the foregoing examples that the embodiment of the present application can use the existing elements in the system message to avoid the ping-pong effect during cell reselection.

It should be noted that, for the sake of simple description, the foregoing method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence. Because in accordance with the present application, certain steps may be performed in other orders or concurrently. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

In order to better implement the above solutions of the embodiments of the present application, related devices for implementing the above solutions are also provided below.

An embodiment of the present application provides a communication device. As shown in FIG. 3 , a terminal device 300 includes:

A parameter acquisition module 301, configured to acquire at least one cell selection parameter, where the at least one cell selection parameter corresponds to at least one cell respectively;

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

Wherein, the target cell is a cell in the at least one cell, and the target cell satisfies a cell selection criterion.

An embodiment of the present application provides a communication device. As shown in FIG. 4 , a network device 400 includes:

A parameter configuration module 401, configured to configure at least one cell selection parameter, the at least one cell selection parameter corresponding to at least one cell respectively;

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

In some embodiments of the present application, the target cell is a cell in at least one adjacent cell, and the cell determination module is configured to determine a cell to be 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 the value of the cell selection parameter when the terminal device does not support assisted uplink SUL, and the second parameter value is the value of the cell selection parameter when the terminal device supports the SUL. value.

In some embodiments of the present application, the cell determination 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 satisfies 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: SUL frequency points corresponding to the at least one cell respectively;

The cell determination module 302, configured to use the first parameter value to determine whether the at least one cell satisfies the cell selection criterion, wherein the terminal device does not support the SUL frequency of the at least one cell; or, Whether the at least one cell satisfies the cell selection criterion is determined using the second parameter value, wherein the terminal device supports the SUL frequency points of the at least one cell.

In some embodiments of the present application, the parameter acquisition module 301 is configured to acquire a system message of the at least one cell sent by a network device, where the system message carries cell selection parameters corresponding to the at least one cell respectively; The at least one cell selection parameter is obtained from the system message.

In some embodiments of the present application, the parameter acquisition module 301 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; the system message further includes: cell selection parameters configured for a first cell, the first cell being a cell in the at least one cell, the cell selection parameters configured for the first cell and the cell selection configured for the frequency where the first cell is located The parameters are not the same; the at least one cell selection parameter is obtained from the system message.

In some embodiments of the present application, the system message includes: a first SUL frequency point, the first SUL frequency point is a SUL frequency point among all SUL frequency points of the first cell, the first SUL frequency point The frequency is different from the SUL frequency pre-corresponding to the downlink frequency where the first SUL frequency is located.

In some embodiments of the present application, the parameter acquisition module 301 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 selection parameter where the terminal device is located. The cell offset value between the local cell and the at least one cell; the cell selection parameters respectively configured for different frequencies and the cell offset value are obtained from the system message; according to the different The at least one cell selection parameter is obtained by the cell selection parameter configured separately for the frequency of the cell 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: cell selection parameters configured for a first cell that is a cell in the at least one cell, the cell selection parameters configured for the first cell and cell selection parameters configured for the frequency where the first cell is located The parameters are not the same.

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 the cell selection parameter where the terminal device is located. A cell offset value between the local cell and the at least one cell.

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

It can be known from the examples of the foregoing embodiments that the terminal device first obtains at least one cell selection parameter, the at least one cell selection parameter corresponds to at least one cell respectively, and the terminal device determines the target cell according to the at least one cell selection parameter. The target cell is a cell in at least one cell, and the target cell satisfies the cell selection criterion. Since at least one cell selection parameter in this embodiment of the present application corresponds to at least one cell, the cell selection parameter obtained by the terminal device is based on the cell level, and the target cell is determined according to the cell selection parameter configured for each cell, then the The target cell refers to a cell that satisfies the cell selection criterion in at least one cell. The target cell determined based on the cell selection parameters at the cell level satisfies the cell selection criteria. When the terminal equipment selects or reselects the target cell, the ping-pong effect will not occur, reducing the processing load of the terminal equipment.

As shown in FIG. 5 , which is a schematic structural diagram of another device according to an embodiment of the application, the device is a terminal device, and the terminal device may include: a processor 131 (for example, a CPU), a memory 132 , a transmitter 134 and a receiver 133 The transmitter 134 and the receiver 133 are coupled to the processor 131, and the processor 131 controls the sending action of the transmitter 134 and the receiving action of the receiver 133. The memory 132 may include a high-speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, and various instructions may be stored in the memory 132 to perform various processing functions and implement the methods of the embodiments of the present application. step. Optionally, the terminal device involved in this 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 the transceiver of the terminal device, or may be separate receiving and transmitting antennas on the terminal device. A communication bus 136 is used to enable communication connections between elements. The above-mentioned communication port 137 is used to realize connection and communication between the terminal device and other peripheral devices.

In this embodiment of the present application, the above-mentioned memory 132 is used to store computer-executable program codes, and the program codes include instructions; when the processor 131 executes the instructions, the instructions cause the processor 131 to perform the processing actions of the terminal device in the above method embodiments, so that the The transmitter 134 performs the sending action of the terminal device in the foregoing method embodiments, and its implementation principle and technical effect are similar, and details are not described herein again.

As shown in FIG. 6 , which is a schematic structural diagram of another device according to an embodiment of the application, the device is a network device, and the network device may include: a processor (for example, a 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 sending 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, and various instructions may be stored in the memory 142 to perform various processing functions and implement the methods of the embodiments of the present application. step. Optionally, the network device involved in this 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 the transceiver of the network device, or may be separate receiving and transmitting antennas on the network device. A communication bus 146 is used to enable communication connections between elements. The above-mentioned communication port 147 is used to implement connection and communication between the network device and other peripheral devices.

In this embodiment of the present application, the above-mentioned memory 142 is used to store computer-executable program codes, and the program codes include instructions; when the processor 141 executes the instructions, the instructions cause the processor 141 to perform the processing actions of the network device in the foregoing method embodiments, so that the The transmitter 144 performs the sending action of the network device in the foregoing method embodiments, and its implementation principle and technical effect are similar, and details are 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 and a communication unit, the processing unit may be, for example, a processor, and the communication unit may be, for example, a Input/output interface, pin or circuit, etc. The processing unit can execute the computer-executed instructions stored in the storage unit, so that the chip in the terminal executes any one of the wireless communication methods described above. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit in the terminal located outside the chip, such as a read-only memory (read only memory). -only memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), etc.

Wherein, 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 of the above The first aspect is an integrated circuit for executing the program of the wireless communication method.

In addition, it should be noted that the device embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be A physical unit, which can be located in one place or distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. In addition, in the drawings of the device embodiments provided in the present application, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement it without creative effort.

From the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary general-purpose hardware. Special components, etc. to achieve. Under normal circumstances, all functions completed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structures used to implement the same function can also be various, such as analog circuits, digital circuits or special circuit, etc. However, a software program implementation is a better implementation in many cases for this application. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that make contributions to the prior art. The computer software products are stored in a readable storage medium, such as a floppy disk of a computer. , U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or CD, etc., including several instructions to make a computer device (which can be A personal computer, a server, or a network device, etc.) executes the methods described in the various embodiments of the present application.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be stored by a computer, or a data storage device such as a server, data center, etc., which includes one or more available media integrated. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), among others.

Claims (28)

1. A method of communication, comprising:

the method comprises the steps that terminal equipment acquires at least one cell selection parameter from network equipment, wherein the at least one cell selection parameter corresponds to at least one cell respectively; the method for acquiring at least one cell selection parameter from a network device by the terminal device 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; the terminal equipment acquires the at least one cell selection parameter from the system message; the system message further includes: a first SUL frequency point, which is an SUL frequency point of all the SUL frequency points of the first cell, and is different from an SUL frequency point corresponding to a downlink frequency of the first SUL frequency point in advance;

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.

2. 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.

3. The method according to claim 1 or 2, wherein the cell selection parameters comprise: 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.

4. The method of claim 3, 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; or,

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.

5. The method of claim 3, 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; or,

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.

6. The method according to claim 1 or 2, wherein the terminal device obtains at least one cell selection parameter, comprising:

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.

7. The method according to claim 1 or 2, wherein the terminal device obtains at least one cell selection parameter, comprising:

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.

8. The method of claim 7, 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.

9. 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; wherein the network device sends the at least one cell selection parameter to a terminal device, and the sending 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: 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; the system message further includes: a first SUL frequency point, which is an SUL frequency point of all the SUL frequency points of the first cell, and is different from an SUL frequency point corresponding to a downlink frequency of the first SUL frequency point in advance;

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

10. The method of claim 9, wherein the cell selection parameter comprises: 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.

11. The method according to claim 9 or 10, 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.

12. The method of claim 11, 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.

13. 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; the parameter acquisition module is used for receiving system messages sent by network equipment, wherein the system messages comprise 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; acquiring the at least one cell selection parameter from the system message; the system message further includes: a first SUL frequency point, which is an SUL frequency point of all the SUL frequency points of the first cell, and is different from an SUL frequency point corresponding to a downlink frequency of the first SUL frequency point in advance;

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.

14. The apparatus of claim 13, 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.

15. The apparatus of claim 13 or 14, wherein the cell selection parameters comprise: 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.

16. The device of claim 15, wherein the cell determination 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.

17. The apparatus of claim 16, 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.

18. The device according to claim 13 or 14, 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.

19. The device according to claim 13 or 14, 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 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.

20. The apparatus of claim 19, 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.

21. 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 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: 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; the system message further includes: a first SUL frequency point, which is an SUL frequency point of all the SUL frequency points of the first cell, and is different from an SUL frequency point corresponding to a downlink frequency of the first SUL frequency point in advance;

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

22. The apparatus of claim 21, wherein the cell selection parameter comprises: 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.

23. The device according to claim 21 or 22, 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 local cell where the terminal device is located and the at least one cell.

24. The apparatus of claim 23, 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.

25. A terminal device, characterized in that the terminal device comprises a processor; wherein:

the processor, when executing program instructions stored in the memory, implements the method of any of claims 1 to 8.

26. The terminal device of claim 25, wherein the terminal device further comprises the memory.

27. A network device, wherein the network device comprises a processor, wherein:

the processor, when executing program instructions stored in the memory, implements the method of any of claims 9 to 12.

28. A computer-readable storage medium comprising instructions which, when executed by one or more processors, implement the method of any one of claims 1-12.

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