Cell selection or reselection method and apparatus, and related device

Abstract

The present application belongs to the technical field of communications, and discloses a cell selection or reselection method and apparatus, and a related device. The cell selection or reselection method in an embodiment of the present application comprises: acquiring first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, the first configuration information of each candidate cell comprising configuration information of a first downlink carrier used by a terminal to perform cell selection and / or cell reselection, and the first downlink carrier being one or more downlink carriers capable of providing a camping service among the at least two downlink carriers of the candidate cell.

Description

Cell selection or reselection method, apparatus and related device

[0001] Cross-reference

[0002] The present disclosure claims priority to Chinese Patent Application No. 202411058903.5, filed on August 2, 2024, entitled "Cell selection or reselection method, apparatus and related device", the entire contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the field of communication technology, and particularly relates to a cell selection or reselection method, apparatus and related device. BACKGROUND

[0004] Currently, a cell only has one downlink carrier, and a user equipment (UE) in an idle state or an inactive state performs cell selection based on single downlink carrier wireless signal measurement and / or frequency priority. In the related art, a cell can include multiple downlink carriers, and the multiple downlink carriers are conducive to the base station configuring the UE to use multiple downlink carriers for data transmission, thereby shortening the service data transmission delay. However, the existing cell selection principle defined based on a cell containing only one downlink carrier is not applicable to a cell containing multiple downlink carriers, and there is no related solution in the prior art about how to perform cell selection or reselection based on multiple downlink carriers of a cell. SUMMARY

[0005] Embodiments of the present application provide a cell selection or reselection method, apparatus and related device, which can solve the problem of how to perform cell selection or reselection based on multiple downlink carriers of a cell.

[0006] In a first aspect, a cell selection or reselection method is provided, which is performed by a terminal, and the method comprises:

[0007] obtaining first configuration information of at least one candidate cell, the candidate cell including at least two downlink carriers, the first configuration information of each candidate cell including configuration information of a first downlink carrier for the terminal to perform cell selection and / or cell reselection, the first downlink carrier being one or more downlink carriers capable of providing camping services among the at least two downlink carriers of the candidate cell;

[0008] performing cell selection processing or cell reselection processing based on the first configuration information of the at least one candidate cell.

[0009] In a second aspect, a cell selection or reselection method is provided, which is performed by a network side device, and the method comprises:

[0010] sending first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, the first configuration information of each of the candidate cell comprising configuration information of a first downlink carrier for cell selection and / or cell reselection of the terminal, the first downlink carrier being one or more downlink carriers of the at least two downlink carriers of the candidate cell that can provide camping services.

[0011] In a third aspect, a cell selection or reselection apparatus is provided, comprising:

[0012] a first receiving module configured to acquire first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, the first configuration information of each of the candidate cell comprising configuration information of a first downlink carrier for cell selection and / or cell reselection of the terminal, the first downlink carrier being one or more downlink carriers of the at least two downlink carriers of the candidate cell that can provide camping services;

[0013] a processing module configured to perform cell selection processing or cell reselection processing based on the first configuration information of the at least one candidate cell.

[0014] In a fourth aspect, a cell selection or reselection apparatus is provided, comprising:

[0015] a first sending module configured to send first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, the first configuration information of each of the candidate cell comprising configuration information of a first downlink carrier for cell selection and / or cell reselection of the terminal, the first downlink carrier being one or more downlink carriers of the at least two downlink carriers of the candidate cell that can provide camping services.

[0016] In a fifth aspect, a cell selection or reselection apparatus is provided, the apparatus being configured to perform the steps of the method according to the first aspect, or to implement the steps of the method according to the second aspect.

[0017] In a sixth aspect, a terminal is provided, the terminal comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions being executed by the processor to implement the steps of the method according to the first aspect.

[0018] In a seventh aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is configured to acquire first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, and the first configuration information of each candidate cell comprising configuration information of a first downlink carrier for cell selection and / or cell reselection of the terminal, the first downlink carrier being one or more downlink carriers of the at least two downlink carriers of the candidate cell that can provide camping services; and the processor is configured to perform cell selection or cell reselection based on the first configuration information of the at least one candidate cell.

[0019] In an eighth aspect, a network-side device is provided, comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the second aspect.

[0020] In a ninth aspect, a network-side device is provided, comprising a processor and a communication interface, wherein the communication interface is configured to send first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, and the first configuration information of each candidate cell comprising configuration information of a first downlink carrier for cell selection and / or cell reselection of the terminal, the first downlink carrier being one or more downlink carriers of the at least two downlink carriers of the candidate cell that can provide camping services.

[0021] In a tenth aspect, a readable storage medium is provided, storing programs or instructions executable on a processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the first aspect or the steps of the method according to the second aspect.

[0022] In an eleventh aspect, a wireless communication system is provided, comprising a terminal and a network-side device, the terminal being configured to implement the steps of the method according to the first aspect, and the network-side device being configured to implement the steps of the method according to the second aspect.

[0023] In a twelfth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to run programs or instructions to implement the method according to the first aspect or the method according to the second aspect.

[0024] In a thirteenth aspect, a computer program / program product is provided, stored in a storage medium, and executed by at least one processor to implement the steps of the method according to the first aspect or the second aspect.

[0025] In the embodiments of the present application, the first configuration information of at least one candidate cell is acquired; and the cell selection processing or the cell reselection processing is performed based on the first configuration information of the at least one candidate cell. The first configuration information in the above scheme includes the configuration information of a first downlink carrier used for the terminal to perform the cell selection and / or the cell reselection, and the first downlink carrier is one or more downlink carriers capable of providing the camping service in the at least two downlink carriers of the candidate cell, i.e., the first configuration information is the information configured for the at least two downlink carriers of the candidate cell and used for the terminal to perform the cell selection and / or the cell reselection, so that when the cell selection processing or the cell reselection processing is performed based on the first configuration information, the cell selection processing or the cell reselection processing can be performed based on the suitable downlink carrier configured in the at least two downlink carriers, and the purpose of performing the cell selection or the cell reselection based on the candidate cell including multiple downlink carriers is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0026] FIG. 1 shows a structure diagram of a communication system to which the embodiments of the present application can be applied;

[0027] FIG. 2 shows a schematic diagram of a multi-downlink carrier heterogeneous cell model;

[0028] FIG. 3 shows a multi-downlink carrier homogeneous cell model;

[0029] FIG. 4 shows a flowchart of a cell selection or reselection method according to an embodiment of the present application;

[0030] FIG. 5 shows a flowchart of a cell selection or reselection method according to another embodiment of the present application;

[0031] FIG. 6 shows a module diagram of a cell selection or reselection apparatus according to an embodiment of the present application;

[0032] FIG. 7 shows a module diagram of a cell selection or reselection apparatus according to another embodiment of the present application;

[0033] FIG. 8 shows a structure block diagram of a communication device according to an embodiment of the present application;

[0034] FIG. 9 shows a structure block diagram of a terminal according to an embodiment of the present application;

[0035] FIG. 10 shows a structure block diagram of a network side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0037] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0038] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0039] It is worth noting that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems. th

[0040] ​FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a terminal-side device such as a mobile phone, a Tablet Personal Computer, a Laptop Computer, a notebook computer, a Personal Digital Assistant (PDA), a palmtop computer, a netbook, an Ultra-mobile Personal Computer (UMPC), a Mobile Internet Device (MID), an Augmented Reality (AR) device, a Virtual Reality (VR) device, a robot, a wearable device, a flight vehicle, a Vehicle User Equipment (VUE), a shipboard device, a Pedestrian User Equipment (PUE), a smart home (a home device with a wireless communication function such as a refrigerator, a television, a washing machine, or furniture), a game console, a Personal Computer (PC), a kiosk, or a self-service machine. The wearable device includes a smart watch, a smart bracelet, a smart earphone, smart glasses, smart jewelry (a smart bracelet, a smart necklace, a smart ring, a smart necklace, a smart anklet, a smart necklace, etc.), a smart wristband, smart clothes, etc. The vehicle-mounted device can also be referred to as a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. The access network device can also be referred to as a Radio Access Network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a Wireless Local Area Network (WLAN) Access Point (AP), or a Wireless Fidelity (WiFi) node, etc.The base station can be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a relay station (RBS), a serving base station (SBS), a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home Node B (HNB), a home evolved Node B, a transmit / receive point (TRP), or some other suitable terminology in the art, and is not limited to a particular technical terminology, provided that the same technical effect is achieved. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0041] The core network device can also be referred to as a core network node, a core network function, or a core network network element, etc., which includes but is not limited to at least one of the following: a mobility management entity (MME), an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), a policy control function (PCF), a policy and charging rules function (PCRF), an edge application server discovery function (EASDF), a unified data management (UDM), a unified data repository (UDR), a home subscriber server (HSS), a centralized network configuration (CNC), a network repository function (NRF), a network exposure function (NEF), a local NEF (L-NEF), a binding support function (BSF), an application function (AF), a location management function (LMF), a gateway mobile location center (GMLC), a network data analytics function (NWDAF), etc. It should be noted that only the core network device in the NR system is taken as an example for introduction in the embodiments of the present application, and the specific type of the core network device is not limited. If the name of the core network device mentioned in the embodiments of the present application changes in the subsequent protocol version (for example, 6G), it is also within the protection scope of the present application.

[0042] Optionally, the core network device can be implemented by one or more function modules in one device, or can be implemented by multiple devices jointly, and the embodiments of the present application do not make a specific limitation in this regard. It can be understood that the above function modules can be network elements in a hardware device, can be software function modules running on a dedicated hardware, or can be virtualized function modules instantiated on a platform (for example, a cloud platform).

[0043] In order for those skilled in the art to better understand the embodiments of the present application, the following is first described.

[0044] 1. cell selection criterion;

[0045] In the related art, when performing cell selection, the user equipment (User Equipment, UE) determines that the strength / quality of the wireless signal of a cell meets the condition of being a camping cell as follows:

[0046] Srxlev>0 and Squal>0;

[0047] Wherein, Srxlev=Q rxlevmeas -(Q rxlevmin +Q rxlevminoffset )-P compensation -Qoffset temp ;

[0048] Squal=Q qualmeas -(Q qualmin +Q qualminoffset )-Qoffset temp ;

[0049] Srxlev(dB) is the received signal strength level for cell selection, which is calculated based on the strength measurement value of the cell pilot signal and some pre-configured parameters. The strength measurement value of the cell pilot signal can be the reference signal received power (Reference Signal Received Power, RSRP).

[0050] Squal(dB) is the received signal quality for cell selection, which is calculated based on the signal quality measurement value of the cell and some pre-configured parameters. The signal quality measurement value of the cell can be the reference signal received quality (Reference Signal Received Quality, RSRQ).

[0051] Q rxlevmeas : the signal strength measurement value of the cell, such as RSRP;

[0052] Q rxlevmin : the necessary minimum received signal strength level;

[0053] Q rxlevminoffset : pre-configured signal strength offset;

[0054] P compensation : pre-configured UE maximum transmit power compensation;

[0055] Q qualmeas : signal quality measurement value of the cell;

[0056] Q qualmin : necessary minimum received signal quality;

[0057] Q rxlevminoffset : pre-configured signal quality offset;

[0058] Qoffset temp : pre-configured temporary offset.

[0059] The above judgment criterion is equivalent to:

[0060] Q rxlevmeas > Thres1, wherein Thres1 = (Q rxlevmin + Q rxlevminoffset ) + P compensation + Qoffset temp .

[0061] and Q qualmeas > Thres2, wherein Thres2 = (Q qualmin + Q qualminoffset ) + Qoffset temp .

[0062] 2. Cell reselection;

[0063] The cell reselection includes intra-frequency cell reselection and inter-frequency cell reselection.

[0064] There are two cases for the inter-frequency cell reselection:

[0065] Case 1: reselection to a target cell on a frequency with higher priority than the current cell frequency;

[0066] In a period of time (Treselection RAT ), the signal quality (Squal) of the target cell is higher than a preset threshold (Thresh X, HighQ ), and the time for the UE to camp on the current cell exceeds 1 second, the UE reselects to the target cell.

[0067] Or, in a period of time (Treselection RAT), the signal strength (Srxlev) of the target cell is higher than a preset threshold (Thresh X,HighP , and the UE stays in the current cell for more than 1 second, the UE reselects to the target cell.

[0068] Case 2: reselection to a target cell on a frequency with lower priority than the current cell frequency;

[0069] Only when the signal strength or signal quality of the current serving cell is lower than a preset threshold, the UE is allowed to reselect to a target cell on a frequency with lower priority than the current cell frequency, whose signal strength or signal quality meets the requirements:

[0070] In a period of time (Treselection RAT ), the signal quality of the current cell is lower than a preset threshold (Thresh Serving, LowQ , and the signal quality of the target cell is higher than another preset threshold (Thresh X,LowQ ), and the UE stays in the current cell for more than 1 second, the UE reselects to the target cell;

[0071] Or in a period of time (Treselection RAT ), the signal strength of the current cell is lower than a preset threshold (Thresh Serving, LowP , and the signal quality of the target cell is higher than another preset threshold (Thresh X,LowP ), and the UE stays in the current cell for more than 1 second, the UE reselects to the target cell;

[0072] If there are multiple cells meeting the above cell reselection conditions, the UE determines the priority order of the multiple cells and reselects to the cell with the highest priority. The general principle is that the UE reselects to the cell with the highest priority on the frequency with the highest priority. When there are multiple cells on the frequency with the highest priority meeting the above conditions, the cells are sorted according to signal strength or signal quality, and the cell with the strongest signal strength or the best signal quality is preferentially reselected.

[0073] Intra-frequency cell reselection and inter-frequency cell reselection with the same priority include sorting the candidate cells whose signal strength and signal quality meet the requirements according to signal strength or signal quality, and then reselecting to the cell with the strongest signal strength or the best signal quality. The parameters for cell sorting are as follows: the larger Rs and Rn are, the higher the priority of the candidate cell is.

[0074] R s = Q meas,s + Q hyst - Qoffset temp ;

[0075] R n = Q meas,n - Qoffset temp ;

[0076] wherein, R s : quality evaluation value of the current serving cell;

[0077] R n : quality evaluation value of the neighbor cell;

[0078] Q meas,s : RSRP of the serving cell;

[0079] Q meas,n : RSRP of the neighbor cell;

[0080] Qoffset: pre-configured offset;

[0081] Qoffset temp : pre-configured temporary offset;

[0082] Q hyst： : hysteresis value.

[0083] For all the candidate cells meeting the requirement of cell strength / quality, the UE measures the RSRP value, calculates its Rs or Rn, and sorts the cells according to the descending order of Rs and Rn, and the UE preferentially selects the cell ranked in the front.

[0084] 3. Multi-downlink carrier cell model;

[0085] The multi-downlink carrier cell refers to a cell including multiple downlink carriers and one or more uplink carriers. FIG. 2 and FIG. 3 show two multi-downlink carrier cells.

[0086] FIG. 2 shows a heterogeneous cell model in which a cell includes one low-frequency downlink carrier and multiple high-frequency downlink carriers. The low-frequency downlink carrier can provide macro coverage and be used for transmission of control plane information, and the high-frequency downlink carrier can provide multi-point small-range coverage and be used for providing high-rate data transmission. In order to share the function of small data transmission of various intelligent applications, the high-frequency downlink carrier can also provide camping and radio access services so that the UE can immediately perform data transmission on the high-frequency downlink carrier after establishing a radio connection. This deployment mode can effectively utilize the high-speed data transmission capability of the high-frequency carrier while ensuring the continuity of the control plane.

[0087] FIG. 3 shows a homogeneous cell in which a cell includes multiple downlink carriers, i.e., the multiple downlink carriers have approximately the same coverage.

[0088] The multi-downlink carrier cell is beneficial to network energy management and UE energy management. The network can turn off some downlink carriers of some sites when the traffic is small. The UE can stay in the same cell without reselecting to another cell and receive the system information of another cell. In addition, the multi-downlink carrier cell is beneficial to the base station to quickly configure the UE to use multiple downlink carriers for data transmission, thereby shortening the delay of service data transmission.

[0089] When a cell has multiple downlink carriers, if the UE still selects the serving cell based on the cell selection principle defined by a cell containing only one downlink carrier, that is, only based on the measurement result or frequency priority of one of the downlink carriers to determine the serving cell, and ignores the measurement result or frequency priority of other downlink carriers, it is possible to cause the UE to select / reselect to a non-optimal candidate cell or perform unnecessary cell reselection.

[0090] For example, when the UE selects the serving cell, if a candidate cell includes downlink carrier 1 and downlink carrier 2, the signal quality / strength of the downlink carrier 1 does not meet the camping requirement, and the downlink carrier 2 has good channel quality / high strength and is suitable for camping; if the UE determines the serving cell only according to the measurement result or frequency priority of the downlink carrier 1, the UE will miss the selection of the cell.

[0091] For another example, assuming that the current serving cell (cell 1) of the UE has downlink carrier 1 and downlink carrier 2, the UE currently camps on the downlink carrier 1, and when the UE measures that the downlink carrier 1 has weak signal strength or low signal quality, the UE reselects to cell 2 without considering the signal quality of the downlink carrier 2, it is possible to reselect to cell 2 in the case that the quality of the downlink carrier 2 meets the camping condition. After the UE reselects to cell 2, the UE needs to receive the system message of cell 2 or trigger the Track Area Update (TAU) process, which wastes the power resource of the UE. If the UE triggers the process of sending the system message on demand in cell 2, the cell 2 will send the system message required by the UE, which increases the power consumption of the network device.

[0092] Alternatively, the UE measures that the downlink signal quality / strength of cell 2 meets the camping requirement, and the frequency priority of the downlink carrier of cell 2 is higher than that of the downlink carrier 1. If the UE does not consider the downlink carrier 2 of the current serving cell, and the frequency priority of the downlink carrier 2 of the current cell is not lower than the priority of the downlink carrier of cell 2, the UE will blindly reselect to cell 2. After the UE camps on cell 2, the UE will reselect to cell 1 according to the measurement of the downlink carrier 2 of cell 1, which causes unnecessary cell reselection and increases the power consumption of the UE.

[0093] The cell selection or reselection method provided by the embodiments of the present application will be described in detail in combination with the accompanying drawings and some embodiments and application scenarios.

[0094] As shown in FIG. 4, the embodiment of the present application provides a cell selection or reselection method, which is executed by a terminal, and the method comprises the following steps:

[0095] Step 401: Obtain first configuration information of at least one candidate cell, wherein the candidate cell comprises at least two downlink carriers, and the first configuration information of each candidate cell comprises configuration information of a first downlink carrier used for cell selection and / or cell reselection of the terminal, and the first downlink carrier is one or more downlink carriers capable of providing camping services among the at least two downlink carriers of the candidate cell.

[0096] For cell reselection, the above-mentioned candidate cell comprises a neighbor cell and a currently camped cell.

[0097] Step 402: Perform cell selection processing or cell reselection processing based on the first configuration information of the at least one candidate cell.

[0098] In the embodiment of the present application, the first configuration information of the at least one candidate cell is obtained, and the cell selection processing or cell reselection processing is performed based on the first configuration information of the at least one candidate cell. The first configuration information in the above-mentioned scheme comprises configuration information of a first downlink carrier used for cell selection and / or cell reselection of the terminal, and the first downlink carrier is one or more downlink carriers capable of providing camping services among the at least two downlink carriers of the candidate cell, that is, the first configuration information is information configured for the at least two downlink carriers of the candidate cell and used for cell selection and / or cell reselection of the terminal, so that when the cell selection processing or cell reselection processing is performed based on the first configuration information, the cell selection processing or cell reselection processing can be performed based on the appropriate downlink carrier configured among the at least two downlink carriers, thereby achieving the purpose of performing cell selection or cell reselection based on the candidate cell comprising multiple downlink carriers.

[0099] Optionally, the first configuration information of the candidate cell comprises at least one of the following:

[0100] A1: Measurement configuration corresponding to each first downlink carrier.

[0101] The first downlink carrier in the embodiment of the present application is a downlink carrier capable of providing camping services among the at least two downlink carriers of the candidate cell.

[0102] By configuring the measurement configuration related to the first downlink carrier, the terminal can perform signal strength and / or signal quality measurement on the first downlink carrier based on the measurement configuration, and then determine whether the first downlink carrier meets the camping condition.

[0103] A2: Frequency priority configuration of each first downlink carrier.

[0104] By configuring the frequency priority of the first downlink carrier, the terminal can select the optimal candidate cell as the serving cell based on the frequency priority of the first downlink carrier.

[0105] A3: a random access resource configuration corresponding to each first downlink carrier.

[0106] Based on the random access resource configuration, the terminal performs a random access procedure based on the random access resource in a case where the terminal selects the first downlink carrier as the camping carrier.

[0107] A4: a search space configuration corresponding to each first downlink carrier.

[0108] A5: a paging configuration corresponding to each first downlink carrier.

[0109] By the paging configuration, the network side layer can perform paging processing on the terminal camping on the first downlink carrier.

[0110] A5: first indication information indicating whether to prohibit accessing the network by using the first downlink carrier.

[0111] Based on the first indication information, the terminal determines whether the first downlink carrier can be used to access the network. In a case where the first indication information indicates that the first downlink carrier is prohibited to access the network, the terminal does not select the first downlink carrier as the camping carrier, so as to avoid unnecessary cell selection or reselection and reduce the power consumption of the terminal.

[0112] In the embodiments of the present application, the related information of at least one first downlink carrier capable of providing camping services in the at least two downlink carriers of the candidate cell enables the terminal to determine whether the first downlink carrier can be selected as the camping carrier, so as to avoid unnecessary cell selection or reselection and reduce the power consumption of the terminal.

[0113] Optionally, the measurement configuration corresponding to each first downlink carrier in A1 includes at least one of a first threshold related configuration parameter and a second threshold related configuration parameter.

[0114] The first threshold is used by the terminal to determine whether the downlink signal strength of the first downlink carrier meets the camping condition.

[0115] The second threshold is used by the terminal to determine whether the downlink signal quality of the first downlink carrier meets the camping condition.

[0116] In the embodiments of the present application, in a case where the candidate cell includes multiple downlink carriers, the network side device can configure the measurement configuration of each first downlink carrier capable of providing camping services through a system message, for the terminal to determine whether the signal strength and / or signal quality of each first downlink carrier capable of providing camping services meets the camping condition.

[0117] Optionally, the configuration parameter related to the first threshold comprises at least one of: a minimum intensity value of a received signal, which can be understood as the Q rxlevmin ; a pre-configured minimum signal intensity offset, which can be understood as the Q rxlevminoffset ; a pre-configured maximum terminal transmission power compensation, which can be understood as the P compensation ; and a pre-configured temporary offset, which can be understood as the Qoffset temp .

[0118] Optionally, the configuration parameter related to the second threshold comprises at least one of: a minimum quality value of a received signal, which can be understood as the Q qualmin ; a pre-configured minimum signal quality offset, which can be understood as the Q rxlevminoffset ; and a pre-configured temporary offset, which can be understood as the Qoffset temp .

[0119] The first threshold can be understood as the Thres1, and the second threshold can be understood as the Thres2.

[0120] In the embodiments of the present application, based on the configuration parameter related to the first threshold and the configuration parameter related to the second threshold of the first downlink carrier, the first downlink carrier is determined to satisfy the camping condition when the formula corresponding to the judgment criterion is satisfied.

[0121] Optionally, the first downlink carrier comprises at least two downlink carriers, and the at least two downlink carriers share at least part of the parameters in the measurement configuration.

[0122] In the embodiments of the present application, when a candidate cell has multiple first downlink carriers capable of providing camping services, in order to save configuration signaling overhead, part of the first downlink carriers can share one or more parameters in the measurement configuration.

[0123] Optionally, the cell selection processing based on the first configuration information of the at least one candidate cell comprises:

[0124] In a case where the signal measurement value of at least one downlink carrier of the candidate cell determined according to the first configuration information satisfies the camping condition, the candidate cell is selected as a camping cell;

[0125] The signal measurement value comprises at least one of a downlink signal intensity and a downlink signal quality, and the camping condition comprises at least one of:

[0126] The downlink signal intensity of the at least one downlink carrier is higher than or equal to a first threshold.

[0127] The downlink signal quality of the at least one downlink carrier is higher than or equal to a second threshold.

[0128] Optionally, the at least one downlink carrier is a downlink carrier for signal measurement indicated by the first configuration information.

[0129] In the embodiments of the present application, in the case that the candidate cell comprises at least two downlink carriers, if the downlink signal strength and / or the downlink signal quality of at least one of the downlink carriers satisfies the camping condition, it is determined that the signal strength and / or the signal quality of the candidate cell satisfies the camping condition. For example, when a cell has two resolvable downlink carriers, downlink carrier 1 and downlink carrier 2, the signal strength thresholds RSRP_thres1, RSRP_thres2 and the signal quality thresholds RSRQ_thres1, RSRQ_thres2 corresponding to downlink carrier 1 and downlink carrier 2 are configured, the signal strength threshold is the first threshold described above, and the signal quality threshold is the second threshold described above. When the UE measures RSRP>RSRP_thres1 and RSRQ>RSRQ_thres1 of downlink carrier 1, and / or measures RSRP>RSRP_thres2 and RSRQ>RSRQ_thres2 of downlink carrier 2, it is determined that the candidate cell is resolvable.

[0130] Optionally, the at least one downlink carrier is a downlink carrier capable of providing a camping service;

[0131] The camping service comprises at least one of the following:

[0132] At least part of a system message transmission service;

[0133] A random access service;

[0134] A paging service.

[0135] For example, when the candidate cell comprises N downlink carriers, and M downlink carriers of the N downlink carriers are capable of providing a camping service, if the signal strength and / or the signal quality of at least one of the M downlink carriers satisfies the camping condition, it is determined that the signal strength and / or the signal quality of the cell satisfies the camping condition.

[0136] The downlink carrier capable of providing a camping service can also be described as a resolvable downlink carrier.

[0137] In the embodiments of the present application, the signal measurement value of the downlink carrier capable of providing a camping service is used to determine whether the cell satisfies the camping condition, which can avoid the terminal to perform signal measurement on the downlink carrier incapable of providing a camping service, and effectively save the energy consumption of the terminal.

[0138] Optionally, the cell reselection processing based on the first configuration information of the at least one candidate cell comprises the following.

[0139] (1) performing candidate cell measurement according to the first configuration information.

[0140] As an optional implementation, performing candidate cell measurement according to the first configuration information comprises: performing measurement on at least one downlink carrier capable of providing camping service of the candidate cell according to the first configuration information.

[0141] In a case where the signal strength and / or signal quality of the at least one downlink carrier capable of providing camping service of the candidate cell meets the camping condition, the candidate cell is determined as a camping cell.

[0142] The candidate cell comprises a serving cell and a neighbor cell.

[0143] (2) performing at least one of the following according to the measurement result of the candidate cell:

[0144] B1: determining whether to trigger cell reselection.

[0145] As an optional implementation, determining whether to trigger cell reselection comprises:

[0146] determining whether a first condition is met according to the measurement result of the candidate cell;

[0147] in a case where the first condition is met, determining to trigger cell reselection;

[0148] wherein the first condition comprises at least one of the following:

[0149] all downlink carriers capable of providing camping service of the serving cell of the terminal do not meet the camping condition;

[0150] a neighbor cell measurement result of the terminal meets a cell reselection condition, the neighbor cell measurement result being obtained by the terminal based on periodic measurement configuration on signals of the neighbor cell.

[0151] B2: determining a candidate cell meeting the camping condition; performing cell reselection processing according to the candidate cell meeting the camping condition.

[0152] As an optional implementation, determining a candidate cell meeting the camping condition comprises:

[0153] determining whether at least one downlink carrier capable of providing camping service of the candidate cell meets the camping condition according to the measurement result of the candidate cell;

[0154] In a case that at least one downlink carrier of the candidate cell capable of providing camped service meets the camp condition, the candidate cell is determined as a candidate cell meeting the camp condition.

[0155] B3: determining a priority order of the candidate cell, the priority order indicating a priority of the candidate cell being selected as a camped cell by the terminal; performing a cell reselection process according to the priority order of the candidate cell.

[0156] As an optional implementation, the priority order of the candidate cell is determined by:

[0157] According to the measurement result of the candidate cell, a frequency priority of at least one downlink carrier of the candidate cell meeting the camp condition is determined; and the priority order of the candidate cell is determined according to the frequency priority of the at least one downlink carrier.

[0158] Optionally, the priority order of the candidate cell is determined according to the frequency priority of the at least one downlink carrier by:

[0159] The priority order of the candidate cell is determined according to the frequency priority of the downlink carrier with the highest frequency priority in the at least one downlink carrier.

[0160] Optionally, the priority order of the candidate cell is determined according to the frequency priority of the downlink carrier with the highest frequency priority in the at least one downlink carrier by:

[0161] The priority order of the candidate cell is determined according to the frequency priority of the downlink carrier with the highest frequency priority in the at least one downlink carrier meeting the camp condition.

[0162] For example, if a candidate cell has multiple campable downlink carriers, and the multiple campable downlink carriers are configured with respective frequency priorities, and the signal strength and / or signal quality of each campable downlink carrier meets the camp condition, the terminal can determine the priority order of the candidate cell according to the frequency priority of the downlink carrier with the highest frequency priority, and reselect to the candidate cell with the highest frequency priority based on the priority order.

[0163] For example, if a candidate cell has multiple campable downlink carriers, and the multiple campable downlink carriers are configured with respective frequency priorities, and the terminal can only determine that the signal strength and / or signal quality of part of the campable downlink carriers meets the camp condition, the terminal can determine the priority order of the candidate cell according to the frequency priority of the downlink carrier with the highest frequency priority in the part of the campable downlink carriers, and reselect to the candidate cell with the highest frequency priority based on the priority order.

[0164] If the UE determines that the current serving cell is ranked first after performing a round of cell (current serving cell or neighbor cell) measurement, the UE continues to camp on the current cell.

[0165] By the above cell reselection method, the terminal can comprehensively consider the campable downlink carriers of a cell to determine the preferred candidate serving cell and determine the target serving cell, which is conducive to reselecting the UE to the optimal target cell, thereby optimizing the UE experience and the performance of the communication system.

[0166] It should be noted that the camped cell in the embodiments of the present application is the serving cell when the terminal is in an idle state or an inactive state.

[0167] Optionally, the candidate cell includes a second downlink carrier and a third downlink carrier, and optionally, the second downlink carrier and the third downlink carrier can be carriers in the first downlink carrier, and the method further includes:

[0168] In the case of satisfying the second condition, the terminal is reselected from the second downlink carrier to the third downlink carrier, and the second downlink carrier is the downlink carrier camped by the terminal.

[0169] The second condition includes at least one of the following:

[0170] C1: The second downlink carrier does not satisfy the camping condition, and the third downlink carrier satisfies the camping condition.

[0171] In the case that the second downlink carrier does not satisfy the camping condition, and the third downlink carrier satisfies the camping condition, by reselecting from the second downlink carrier to the third downlink carrier, the terminal is avoided to be reselected to another cell for the system message receiving process, thereby being conducive to saving the terminal energy consumption, in addition, the process of triggering the network to send the system message on demand due to the terminal reselecting to another cell is also avoided, which is conducive to saving the network energy consumption.

[0172] C2: The frequency priority of the third downlink carrier configured by the network side is higher than the frequency priority of the second downlink carrier, and the third downlink carrier satisfies the camping condition.

[0173] In the case that the bandwidth of the third downlink carrier is greater than the bandwidth of the second downlink carrier, by reselecting from the second downlink carrier to the third downlink carrier, the terminal can be preferentially camped on the third downlink carrier with higher frequency priority, and when the UE has a service demand, the third downlink carrier can provide wireless connection and data transmission services, and can quickly provide high-speed data transmission services for the UE.

[0174] C3: The second indication information is received, and the second indication information indicates that the terminal is switched from the second downlink carrier to the third downlink carrier which satisfies the camping condition.

[0175] The second indication information can be carried in a target signaling message, which is a signaling message received by the terminal before being released from the connected state to the idle state or the inactive state, or the second indication information can also be carried by a release message.

[0176] Optionally, the second indication information can implicitly indicate the terminal to switch from the second downlink carrier to the third downlink carrier satisfying the camping condition by indicating that the second downlink carrier needs to be closed.

[0177] For example, when a candidate cell includes multiple downlink carriers, the network can close part of the downlink carriers due to the need for network energy saving at low load. The network can send a notification message, i.e., the second indication information, through a system message, a paging message or a broadcast to inform the UE camping on the part of the downlink carriers that the part of the downlink carriers needs to be closed. After receiving the notification message, the UE reselects to other downlink carriers of the current serving cell or other cells. This method is beneficial to network energy saving, and allows the UE to perform downlink carrier reselection or cell reselection before the current part of the downlink carriers is closed, thereby avoiding the situation that the UE cannot monitor the paging message from the network in the process of performing reselection to other downlink carriers or other cells of the current serving cell after the part of the downlink carriers is closed. Optionally, the target downlink carrier information can be indicated in the paging message, and the UE reselects the target downlink carrier according to the target downlink carrier information. The target downlink carrier can be understood as the third downlink carrier satisfying the camping condition.

[0178] Through the second indication information, the network side can adjust the carrier balance between the downlink carriers of the cell.

[0179] C4: The frequency priority of the third downlink carrier determined according to the mobility information of the terminal is higher than the frequency priority of the second downlink carrier, and the third downlink carrier satisfies the camping condition.

[0180] In the embodiments of the present application, the UE can select the downlink carrier according to its mobility. If the UE determines that it has high mobility or medium mobility, the UE selects the downlink carrier suitable for the UE with high mobility / medium mobility to camp, such as a low-frequency downlink carrier or a preferred downlink carrier of a high-mobility UE configured by system information. When the UE has low mobility, the UE selects the downlink carrier suitable for the UE with low mobility to camp, such as a high-frequency carrier or a preferred downlink carrier of a low-mobility UE configured by system information.

[0181] The UE can determine its mobility according to its moving speed, or according to the frequency of its previous cell reselection, or the frequency of the UE changing the service beam in the same cell, or the frequency of the UE changing the TRP providing service in the same cell, etc.

[0182] In the embodiments of the present application, high mobility can be understood as a moving speed greater than a first preset threshold, medium mobility can be understood as a moving speed greater than a second preset threshold and less than or equal to the first preset threshold, and low mobility can be understood as a moving speed less than or equal to the second preset threshold. The first preset threshold is greater than the second preset threshold.

[0183] Optionally, the method of the embodiments of the present application further comprises:

[0184] receiving frequency priority configuration information of the third downlink carrier from the network side device; the frequency priority configuration information comprises at least two frequency priorities, and the at least two frequency priorities correspond to different terminal mobilities.

[0185] For example, the frequency priority configuration information comprises a first frequency priority and at least one second frequency priority.

[0186] In the embodiments of the present application, the network side can configure the frequency priority of the residable downlink carrier according to the mobility information of the terminal, so as to facilitate the terminal to select the residable carrier suitable for its mobility based on the frequency priority.

[0187] Optionally, in the case that the terminal is of medium mobility or high mobility, the frequency priority of the third downlink carrier is the first frequency priority.

[0188] In the case that the terminal is of low mobility, the frequency priority of the third downlink carrier is the second frequency priority.

[0189] Optionally, the third downlink carrier is a low-frequency downlink carrier, and the second downlink carrier is a high-frequency downlink carrier.

[0190] In some embodiments of the present application, the UE determines the frequency priority of each residable downlink carrier of the current serving cell according to its mobility, and then selects the residable downlink carrier according to the determined frequency priority. For example, the third downlink carrier CC3 of the current serving cell is a low-frequency carrier and can provide large-area coverage, and the corresponding default frequency priority is Priority 1, which corresponds to the second frequency priority described above. The high-mobility UE determines that the frequency priority of CC3 is Priority 3 (higher than Priority 2), which corresponds to the first frequency priority described above. The second downlink carrier CC2 is a high-frequency carrier and can provide a smaller coverage range, and the default priority is Priority 2 (higher than Priority 1 and lower than Priority 3).

[0191] When the UE is in low mobility, the frequency priority of CC3 is Priority 1 and the frequency priority of CC2 is Priority 2 according to the configuration in the system information, and the UE preferentially selects CC2;

[0192] When the UE is in medium or high mobility, the frequency priority of CC3 is Priority 3 (higher than Priority 1 and Priority 2) and the frequency priority of CC2 is still Priority 2 according to the configuration in the system information, and the UE preferentially selects CC3.

[0193] The UE with medium or high mobility preferentially selects to camp on the low-frequency downlink carrier, which is beneficial to reduce the number of reselecting service beams or reselecting TRPs; in addition, the high-frequency downlink carrier in the cell can not provide continuous coverage, and if the UE with medium or high mobility preferentially camps on the high-frequency carrier, the UE will frequently reselect between the high-frequency downlink carrier and the high-frequency downlink carrier, which increases the power consumption of the UE.

[0194] In the above scheme of the embodiments of the present application, when a cell has multiple downlink carriers, the UE comprehensively considers the downlink carrier signal quality, the frequency priority, the mobility of the UE, and the like when selecting or reselecting a cell, determines a preferred target cell as a serving cell, and can improve the user experience, and improve the spectrum efficiency, capacity and throughput of the communication network.

[0195] As shown in FIG. 5, the embodiments of the present application also provide a cell selection or reselection method, which is executed by a network side device, and the method comprises:

[0196] Step 501: transmitting first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, and the first configuration information of each candidate cell comprising configuration information of a first downlink carrier for the terminal to perform cell selection and / or cell reselection, the first downlink carrier being one or more downlink carriers capable of providing camping services in the at least two downlink carriers of the candidate cell.

[0197] In the embodiments of the present application, the network side device sends first configuration information of at least one candidate cell, the first configuration information including configuration information of a first downlink carrier for cell selection and / or cell reselection of the terminal, the first downlink carrier being one or more downlink carriers capable of providing camping services among at least two downlink carriers of the candidate cell, i.e., the first configuration information being information configured for cell selection and / or cell reselection of the terminal among at least two downlink carriers of the candidate cell, so that when the terminal performs cell selection or cell reselection based on the first configuration information, the terminal can perform cell selection or cell reselection based on a suitable downlink carrier configured among the at least two downlink carriers, thereby achieving the purpose of cell selection or cell reselection based on a candidate cell including multiple downlink carriers.

[0198] Optionally, the first configuration information of the candidate cell includes at least one of the following:

[0199] measurement configuration corresponding to each first downlink carrier;

[0200] frequency priority configuration of each first downlink carrier;

[0201] random access resource configuration corresponding to each first downlink carrier;

[0202] search space configuration corresponding to each first downlink carrier;

[0203] paging configuration corresponding to each first downlink carrier;

[0204] first indication information indicating whether the terminal is prohibited from accessing the network using the first downlink carrier.

[0205] Optionally, the measurement configuration corresponding to each first downlink carrier includes at least one of the following: first threshold related configuration parameters and second threshold related configuration parameters;

[0206] The first threshold is used by the terminal to determine whether the downlink signal strength of the first downlink carrier meets the camping condition.

[0207] The second threshold is used by the terminal to determine whether the downlink signal quality of the first downlink carrier meets the camping condition.

[0208] Optionally, the first threshold related configuration parameters include at least one of the following: a minimum strength value of a received signal; a preconfigured minimum signal strength offset; a preconfigured maximum terminal transmit power compensation; and a preconfigured temporary offset.

[0209] And / or, the second threshold related configuration parameters include at least one of the following: a minimum quality value of a received signal; a preconfigured minimum signal quality offset; and a preconfigured temporary offset.

[0210] Optionally, the first downlink carrier comprises at least two downlink carriers, and the at least two downlink carriers share at least part of the parameters in the measurement configuration.

[0211] It should be noted that the first configuration information has been described in detail in the method embodiment on the terminal side, and will not be described here.

[0212] Optionally, the method of the embodiment of the application further comprises:

[0213] sending second indication information, the second indication information indicating that the terminal is switched from the second downlink carrier to a third downlink carrier satisfying the camping condition.

[0214] The second indication information can be carried in a target signaling message, which is a signaling message received by the terminal before being released from the connected state to the idle state or the inactive state, or the second indication information can also be carried through a release message.

[0215] Optionally, the second indication information can implicitly indicate that the terminal is switched from the second downlink carrier to the third downlink carrier satisfying the camping condition in a manner of indicating that the second downlink carrier needs to be turned off.

[0216] The second indication information has been described in detail in the method embodiment on the terminal side, and will not be described here.

[0217] Optionally, the method of the embodiment of the application further comprises:

[0218] sending frequency priority configuration information of the third downlink carrier, the frequency priority configuration information comprising at least two frequency priorities corresponding to different terminal mobility.

[0219] Optionally, in the case that the terminal has medium mobility or high mobility, the frequency priority of the second downlink carrier is a first frequency priority;

[0220] In the case that the terminal has low mobility, the frequency priority of the second downlink carrier is a second frequency priority.

[0221] Optionally, the third downlink carrier is a low-frequency downlink carrier, and the second downlink carrier is a high-frequency downlink carrier.

[0222] The UE with medium mobility or high mobility preferentially selects to camp on a low-frequency downlink carrier, which is conducive to reducing the number of times of reselecting a service beam or reselecting a TRP; in addition, the high-frequency downlink carrier in the cell may not provide continuous coverage, and if the UE with medium mobility or high mobility preferentially camps on a high-frequency carrier, it will frequently reselect between the high-frequency downlink carrier and the high-frequency downlink carrier, increasing the power consumption of the UE.

[0223] In the above scheme of the embodiments of the present application, when a cell has multiple downlink carriers, the UE, in cell selection or reselection, comprehensively considers the downlink carrier signal quality, frequency priority, and its own mobility, to determine a preferred target cell as a serving cell, which can improve user experience, and improve the spectrum efficiency, capacity, and throughput of the communication network.

[0224] The cell selection or reselection method provided by the embodiments of the present application can be executed by a cell selection or reselection device. The embodiments of the present application take the cell selection or reselection device as an example to illustrate the cell selection or reselection device provided by the embodiments of the present application.

[0225] The cell selection or reselection device provided by the embodiments of the present application can be a communication device or a component in a communication device, such as a chip, as an example. The communication device can be a terminal, a network side device, a server, or the like. The terminal can include, but is not limited to, the types of the terminal 11 listed above, the network side device can include, but is not limited to, the types of the network side device 12 listed above, and the embodiments of the present application do not make specific limitations.

[0226] The cell selection or reselection device includes a receiving module, a sending module, and a processing module. The receiving module, the sending module, and the processing module can be implemented by software or by hardware. When implemented by hardware, the processing module can be implemented by a processor, which can include a general purpose processor, a special purpose processor, or the like, such as a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligent (AI) processor, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, or the like. The receiving module and the sending module can be implemented by a communication interface, which can include one or more of a transceiver, a pin, a circuit, a bus, a radio frequency unit, or the like.

[0227] Specifically, referring to FIG. 6, when a cell selection or reselection apparatus is a terminal or a component in the terminal, the cell selection or reselection apparatus 600 comprises: a first receiving module 601, configured to acquire first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, and the first configuration information of each candidate cell comprising configuration information of a first downlink carrier for cell selection and / or cell reselection of the terminal, the first downlink carrier being one or more downlink carriers capable of providing camping services among the at least two downlink carriers of the candidate cell; and a processing module 602, configured to perform cell selection processing or cell reselection processing based on the first configuration information of the at least one candidate cell.

[0228] Optionally, the first configuration information of the candidate cell comprises at least one of the following:

[0229] measurement configuration corresponding to each first downlink carrier;

[0230] frequency priority configuration of each first downlink carrier;

[0231] random access resource configuration corresponding to each first downlink carrier;

[0232] search space configuration corresponding to each first downlink carrier;

[0233] paging configuration corresponding to each first downlink carrier;

[0234] first indication information indicating whether the terminal is prohibited from accessing the network by using the first downlink carrier.

[0235] Optionally, the measurement configuration corresponding to each first downlink carrier comprises at least one of the following: a first threshold-related configuration parameter and a second threshold-related configuration parameter.

[0236] The first threshold is used for the terminal to determine whether a downlink signal strength of the first downlink carrier meets a camping condition.

[0237] The second threshold is used for the terminal to determine whether a downlink signal quality of the first downlink carrier meets the camping condition.

[0238] Optionally, the first threshold-related configuration parameter comprises at least one of the following: a minimum strength value of a received signal; a preconfigured minimum signal strength offset; a preconfigured maximum terminal transmission power compensation; and a preconfigured temporary offset.

[0239] And / or, the second threshold-related configuration parameter comprises at least one of the following: a minimum quality value of a received signal; a preconfigured minimum signal quality offset; and a preconfigured temporary offset.

[0240] Optionally, the first downlink carrier comprises at least two downlink carriers, and the at least two downlink carriers share at least part of parameters in the measurement configuration.

[0241] Optionally, the processing module is configured to:

[0242] select the candidate cell as a camped cell in a case where the signal measurement value of the at least one downlink carrier of the candidate cell determined according to the first configuration information satisfies a camp condition.

[0243] wherein the signal measurement value comprises at least one of downlink signal strength and downlink signal quality, and the camp condition comprises at least one of:

[0244] the downlink signal strength of the at least one downlink carrier is higher than or equal to a first threshold;

[0245] the downlink signal quality of the at least one downlink carrier is higher than or equal to a second threshold.

[0246] Optionally, the at least one downlink carrier is a downlink carrier capable of providing a camp service.

[0247] wherein the camp service comprises at least one of:

[0248] at least part of system message transmission service;

[0249] random access service;

[0250] paging service.

[0251] Optionally, the processing module is configured to perform at least one of:

[0252] performing candidate cell measurement according to the first configuration information;

[0253] performing at least one of the following according to the measurement result of the candidate cell:

[0254] determining whether to trigger cell reselection;

[0255] determining a candidate cell meeting a camp condition; performing cell reselection processing according to the candidate cell meeting the camp condition;

[0256] determining a priority order of the candidate cell, the priority order indicating a priority of the candidate cell being selected as a camped cell by a terminal; performing cell reselection processing according to the priority order of the candidate cell.

[0257] Optionally, the processing module is configured to measure at least one downlink carrier capable of providing a camp service by the candidate cell according to the first configuration information.

[0258] Optionally, the processing module is configured to:

[0259] determine whether a first condition is satisfied according to the measurement result of the candidate cell;

[0260] determine to trigger cell reselection in a case where the first condition is satisfied;

[0261] wherein the first condition comprises at least one of the following:

[0262] all downlink carriers capable of providing camping services in a serving cell of the terminal do not satisfy a camping condition;

[0263] a neighbor cell measurement result of the terminal satisfies a cell reselection condition, the neighbor cell measurement result being obtained by the terminal based on periodic measurement configuration on signals of neighbor cells.

[0264] Optionally, the processing module is configured to:

[0265] determine whether at least one downlink carrier capable of providing camping services of the candidate cell satisfies a camping condition according to the measurement result of the candidate cell;

[0266] determine the candidate cell as a candidate cell satisfying the camping condition in a case where the at least one downlink carrier capable of providing camping services of the candidate cell satisfies the camping condition.

[0267] Optionally, the processing module is configured to:

[0268] determine a frequency priority of at least one downlink carrier satisfying the camping condition of the candidate cell according to the measurement result of the candidate cell;

[0269] determine a priority order of the candidate cell according to the frequency priority of the at least one downlink carrier.

[0270] Optionally, the processing module is configured to:

[0271] determine a priority order of the candidate cell according to the frequency priority of a downlink carrier with the highest frequency priority in the at least one downlink carrier.

[0272] Optionally, the processing module is configured to:

[0273] determine a priority order of the candidate cell according to the frequency priority of a downlink carrier with the highest frequency priority satisfying the camping condition in the at least one downlink carrier.

[0274] Optionally, the candidate cell comprises a second downlink carrier and a third downlink carrier, and the processing module is further configured to:

[0275] In the case of satisfying the second condition, reselecting to the third downlink carrier from the second downlink carrier, the second downlink carrier being a downlink carrier in which the terminal camps;

[0276] The second condition comprises at least one of the following:

[0277] The second downlink carrier does not satisfy a camping condition, and the third downlink carrier satisfies the camping condition;

[0278] The frequency priority of the third downlink carrier configured by the network side is higher than the frequency priority of the second downlink carrier, and the third downlink carrier satisfies the camping condition;

[0279] Receiving second indication information, the second indication information indicating that the terminal is switched to the third downlink carrier satisfying the camping condition from the second downlink carrier;

[0280] The frequency priority of the third downlink carrier determined according to the mobility information of the terminal is higher than the frequency priority of the second downlink carrier, and the third downlink carrier satisfies the camping condition.

[0281] Optionally, the apparatus of the embodiment of the present application further comprises:

[0282] The second receiving module is configured to receive frequency priority configuration information of the third downlink carrier from the network side device; the frequency priority configuration information comprises at least two frequency priorities corresponding to different terminal mobilities.

[0283] In the embodiment of the present application, the terminal can determine the frequency priority of the third downlink carrier according to the mobility information.

[0284] Optionally, in the case of the terminal being of medium or high mobility, the frequency priority of the second downlink carrier is a first frequency priority;

[0285] In the case of the terminal being of low mobility, the frequency priority of the second downlink carrier is a second frequency priority.

[0286] Referring to FIG. 7, when the cell selection or reselection apparatus is a network side device or a component in the network side device, the cell selection or reselection apparatus 700 comprises a first sending module 701 configured to send first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, and the first configuration information of each candidate cell comprising configuration information of a first downlink carrier for terminal cell selection and / or cell reselection, the first downlink carrier being one or more downlink carriers capable of providing camping services in the at least two downlink carriers of the candidate cell.

[0287] Optionally, the first configuration information of the candidate cell comprises at least one of the following:

[0288] measurement configuration corresponding to each first downlink carrier;

[0289] frequency priority configuration of each first downlink carrier;

[0290] random access resource configuration corresponding to each first downlink carrier;

[0291] search space configuration corresponding to each first downlink carrier;

[0292] paging configuration corresponding to each first downlink carrier;

[0293] first indication information indicating whether the terminal is prohibited from accessing the network by using the first downlink carrier.

[0294] Optionally, the measurement configuration related to each first downlink carrier comprises at least one of a first threshold related configuration parameter and a second threshold related configuration parameter.

[0295] The first threshold is used by the terminal to determine whether a downlink signal strength of the first downlink carrier meets a camping condition.

[0296] The second threshold is used by the terminal to determine whether a downlink signal quality of the first downlink carrier meets the camping condition.

[0297] Optionally, the first threshold related configuration parameter comprises at least one of a minimum strength value of a received signal, a preconfigured minimum signal strength offset, a preconfigured maximum terminal transmit power compensation, and a preconfigured temporary offset.

[0298] And / or, the second threshold related configuration parameter comprises at least one of a minimum quality value of a received signal, a preconfigured minimum signal quality offset, and a preconfigured temporary offset.

[0299] Optionally, the first downlink carrier comprises at least two downlink carriers, and the at least two downlink carriers share at least part of the parameters in the measurement configuration.

[0300] Optionally, the apparatus of the embodiment of the present application further comprises:

[0301] a second sending module configured to send second indication information, the second indication information indicating that the terminal is switched from a second downlink carrier to a third downlink carrier meeting a camping condition.

[0302] Optionally, the apparatus of the embodiment of the present application further comprises:

[0303] The third sending module is configured to send frequency priority configuration information of the third downlink carrier, wherein the frequency priority configuration information comprises at least two frequency priorities, and the at least two frequency priorities correspond to different terminal mobilities.

[0304] Optionally, in the case that the terminal is of medium or high mobility, the frequency priority of the second downlink carrier is a first frequency priority.

[0305] In the case that the terminal is of low mobility, the frequency priority of the second downlink carrier is a second frequency priority.

[0306] In the embodiments of the present application, the first configuration information comprises configuration information of the first downlink carrier for cell selection and / or cell reselection of the terminal, and the first downlink carrier is one or more downlink carriers capable of providing camping services among the at least two downlink carriers of the candidate cell, i.e., the first configuration information is information configured for cell selection and / or cell reselection of the terminal among the at least two downlink carriers of the candidate cell, so that when the cell selection process or the cell reselection process is performed based on the first configuration information, the cell selection process or the cell reselection process can be performed based on the configured appropriate downlink carrier among the at least two downlink carriers, and the purpose of performing cell selection or cell reselection based on the candidate cell comprising multiple downlink carriers is achieved.

[0307] The cell selection or reselection apparatus provided by the embodiments of the present application can implement each process implemented by the method embodiments of FIG. 4 to FIG. 5 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0308] As shown in FIG. 8, the embodiments of the present application further provide a communication device 800, comprising a processor 801 and a memory 802, wherein the memory 802 stores programs or instructions executable on the processor 801. For example, when the communication device 800 is a terminal, the programs or instructions are executed by the processor 801 to implement each step of the cell selection or reselection method embodiments performed by the terminal, and achieve the same technical effects. When the communication device 800 is a network side device, the programs or instructions are executed by the processor 801 to implement each step of the cell selection or reselection method embodiments performed by the network side device, and achieve the same technical effects. To avoid repetition, details are not described herein.

[0309] The embodiment of the present application further provides a terminal comprising a processor and a communication interface, wherein the communication interface is coupled with the processor, and the processor is configured to run programs or instructions to implement the steps in the method embodiment shown in FIG. 4. The terminal embodiment corresponds to the terminal-side method embodiment described above, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment and achieve the same technical effects. The terminal can be the cell selection or reselection apparatus shown in FIG. 9. Specifically, FIG. 9 is a schematic diagram of the hardware structure of a terminal for implementing the embodiment of the present application.

[0310] The terminal 900 includes, but is not limited to, at least part of components such as a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, and a processor 910.

[0311] Those skilled in the art can understand that the terminal 900 can further include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected with the processor 910 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG. 9 does not constitute a limitation on the terminal, and the terminal can include more or fewer components than those shown, or combine certain components, or have a different component arrangement, which will not be described here.

[0312] It should be understood that in the embodiment of the present application, the input unit 904 can include a graphics processor 9041 and a microphone 9042, and the graphics processor 9041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 can include a display panel 9061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 907 includes at least one of a touch panel 9071 and other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 can include two parts of a touch detection device and a touch controller. The other input devices 9072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), a trackball, a mouse, a joystick, etc., which will not be described here.

[0313] In the embodiment of the present application, the radio frequency unit 901 can transmit downlink data from a network side device to the processor 910 for processing, and can send uplink data to the network side device. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0314] The memory 909 can be used to store software programs or instructions and various data. The memory 909 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 909 can include a volatile memory or a non-volatile memory. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory 909 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0315] The processor 910 can include one or more processing units; optionally, the processor 910 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 910.

[0316] The radio frequency unit 901 is configured to obtain first configuration information of at least one candidate cell, wherein the candidate cell includes at least two downlink carriers, and the first configuration information of each candidate cell includes configuration information of a first downlink carrier used for cell selection and / or cell reselection of a terminal, and the first downlink carrier is one or more downlink carriers capable of providing camping services among the at least two downlink carriers of the candidate cell.

[0317] The processor 910 is configured to perform cell selection processing or cell reselection processing based on the first configuration information of the at least one candidate cell.

[0318] In the embodiments of the present application, the first configuration information of the at least one candidate cell is acquired; and the cell selection processing or the cell reselection processing is performed based on the first configuration information of the at least one candidate cell. In the above scheme, the first configuration information includes the configuration information of the first downlink carrier used for the terminal to perform the cell selection and / or the cell reselection, and the first downlink carrier is one or more downlink carriers capable of providing camping services in the at least two downlink carriers of the candidate cell, that is, the first configuration information is the information configured for the at least two downlink carriers of the candidate cell and used for the terminal to perform the cell selection and / or the cell reselection, so that when the cell selection processing or the cell reselection processing is performed based on the first configuration information, the cell selection processing or the cell reselection processing can be performed based on the suitable downlink carrier configured in the at least two downlink carriers, thereby achieving the purpose of performing the cell selection or the cell reselection based on the candidate cell including multiple downlink carriers.

[0319] It can be understood that the implementation processes of the implementation manners mentioned in the embodiments can refer to the related descriptions of the cell selection or reselection method in the method embodiments, and achieve the same or corresponding technical effects. To avoid repetition, they will not be described here again.

[0320] The embodiments of the present application also provide a network side device, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to realize the steps of the method embodiments as shown in FIG. 5. The network side device embodiments correspond to the network side device method embodiments described above, and each implementation process and implementation manner of the method embodiments can be applied to the network side device embodiments, and can achieve the same technical effects.

[0321] Specifically, the embodiments of the present application also provide a network side device, which can be a cell selection or reselection apparatus as shown in FIG. 10. As shown in FIG. 10, the network side device 1000 includes an antenna 101, a radio frequency device 102, a baseband device 103, a processor 104 and a memory 105. The antenna 101 is connected with the radio frequency device 102. In the uplink direction, the radio frequency device 102 receives information through the antenna 101, and sends the received information to the baseband device 103 for processing. In the downlink direction, the baseband device 103 processes the information to be sent and sends it to the radio frequency device 102, and the radio frequency device 102 processes the received information and sends it out through the antenna 101.

[0322] The method performed by the network side device in the above embodiments can be implemented in the baseband device 103, and the baseband device 103 includes a baseband processor.

[0323] The baseband device 103 can include at least one baseband board on which a plurality of chips are disposed, as shown in FIG. 10. One of the chips is, for example, a baseband processor, which is connected to the memory 105 through a bus interface to invoke programs in the memory 105 to perform the network device operations shown in the above method embodiments.

[0324] The network side device can further include a network interface 106, which is, for example, a Common Public Radio Interface (CPRI).

[0325] Specifically, the network side device 1000 of the embodiments of the present application further includes instructions or programs stored in the memory 105 and executable on the processor 104, which invokes the instructions or programs in the memory 105 to perform the method executed by the modules shown in FIG. 7 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0326] The embodiments of the present application further provide a readable storage medium having programs or instructions stored thereon, which are executed by a processor to implement each process of the above cell selection or reselection method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0327] The processor is the processor in the terminal described in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0328] The embodiments of the present application further provide a chip including a processor and a communication interface, the communication interface being coupled to the processor, and the processor being configured to execute programs or instructions to implement each process of the above cell selection or reselection method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0329] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system chip, a system on chip, a chip system or a system on chip, etc.

[0330] The embodiments of the present application further provide a computer program / program product stored in a storage medium, which is executed by at least one processor to implement each process of the above cell selection or reselection method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0331] The embodiments of the present application further provide a wireless communication system, comprising: a terminal and a network side device, the terminal can be used to execute the steps of the cell selection or reselection method executed by the terminal, and the network side device can be used to execute the steps of the cell selection or reselection method executed by the network side device.

[0332] It should be noted that, in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements do not include only those elements recited, but can also include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element preceded by "comprising" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that includes the recited element. Also, it should be noted that the scope of the methods and apparatus of the present embodiments are not limited by the order of the steps or the order of the components, as some steps or components can occur or be performed at the same time, or in a different order than as described. Furthermore, features that are described with respect to certain examples can be combined in other examples.

[0333] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of computer software products and general hardware platforms, and of course, can also be realized by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disc, optical disc, etc.), and includes a plurality of instructions for making the terminal or network side device execute the method described in each embodiment of the present application.

[0334] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, but not restrictive, and those skilled in the art can make many forms of embodiments under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A cell selection or reselection method performed by a terminal, the method comprising: obtaining first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, the first configuration information of each candidate cell comprising configuration information of a first downlink carrier for cell selection and / or cell reselection of the terminal, the first downlink carrier being one or more downlink carriers of the at least two downlink carriers of the candidate cell capable of providing camping services; and performing cell selection or cell reselection based on the first configuration information of the at least one candidate cell. The first configuration information of the candidate cell comprises at least one of: measurement configuration corresponding to each first downlink carrier; frequency priority configuration of each first downlink carrier; random access resource configuration corresponding to each first downlink carrier; search space configuration corresponding to each first downlink carrier; paging configuration corresponding to each first downlink carrier; and first indication information of whether to prohibit accessing the network using the first downlink carrier. The measurement configuration corresponding to each first downlink carrier comprises at least one of: first threshold related configuration parameters and second threshold related configuration parameters; wherein the first threshold is used by the terminal to determine whether the downlink signal strength of the first downlink carrier meets a camping condition; and the second threshold is used by the terminal to determine whether the downlink signal quality of the first downlink carrier meets the camping condition. The first threshold related configuration parameters comprise at least one of: a minimum strength value of a received signal; a preconfigured minimum signal strength offset; a preconfigured maximum terminal transmit power compensation; and a preconfigured temporary offset. The second threshold related configuration parameters comprise at least one of: a minimum quality value of a received signal; a preconfigured minimum signal quality offset; and a preconfigured temporary offset. The first downlink carrier comprises at least two downlink carriers, and the at least two downlink carriers share at least part of the parameters in the measurement configuration. The performing cell selection based on the first configuration information of the at least one candidate cell comprises: selecting the candidate cell as a camping cell if it is determined according to the first configuration information that the signal measurement value of at least one downlink carrier of the candidate cell meets a camping condition, wherein the signal measurement value comprises at least one of: downlink signal strength and downlink signal quality, and the camping condition comprises at least one of: the downlink signal strength of the at least one downlink carrier is higher than or equal to the first threshold; and the downlink signal quality of the at least one downlink carrier is higher than or equal to the second threshold. The at least one downlink carrier is a downlink carrier capable of providing camping services. The camping services comprise at least one of: at least part of system message transmission services; random access services; and paging services. The performing cell reselection based on the first configuration information of the at least one candidate cell comprises: performing candidate cell measurement according to the first configuration information; and performing at least one of: determining whether to trigger cell reselection; and determining whether to select the candidate cell as a reselection cell according to the measurement result of the candidate cell. ​ ​ 2. The method of claim 1, wherein, ​ ​ ​ ​ ​ ​ ​ 3. The method of claim 2, wherein, ​ ​ ​ 4. The method of claim 3, wherein, ​ ​ 5. The method of claim 3 or 4, wherein, ​ 6. The method according to any one of claims 1 to 5, wherein, ​ ​ ​ ​ ​ 7. The method of claim 6, wherein, ​ ​ ​ ​ ​ 8. The method according to any one of claims 1 to 5, wherein, ​ ​ ​ ​ determining a candidate cell meeting a camping condition; performing cell reselection based on the candidate cell meeting the camping condition; determining a priority order of the candidate cell, the priority order indicating a priority of the candidate cell being selected as a camping cell by the terminal; performing cell reselection based on the priority order of the candidate cell.

9. The method of claim 8, wherein, The performing candidate cell measurement according to the first configuration information comprises: performing measurement on at least one downlink carrier capable of providing camping service of the candidate cell according to the first configuration information.

10. The method of claim 8 or 9, wherein, The determining whether to trigger cell reselection comprises: determining whether a first condition is met according to the measurement result of the candidate cell; determining to trigger cell reselection in a case where the first condition is met. The first condition comprises at least one of: all downlink carriers capable of providing camping service in a serving cell of the terminal do not meet a camping condition; a neighbor cell measurement result of the terminal meets a cell reselection condition, the neighbor cell measurement result being obtained by the terminal based on periodic measurement configuration on a signal of the neighbor cell.

11. The method according to any one of claims 8 to 10, wherein, The determining a candidate cell meeting a camping condition comprises: determining whether at least one downlink carrier capable of providing camping service of the candidate cell meets a camping condition according to the measurement result of the candidate cell; determining the candidate cell as the candidate cell meeting the camping condition in a case where the at least one downlink carrier capable of providing camping service of the candidate cell meets the camping condition.

12. The method according to any one of claims 8 to 11, wherein, The determining a priority order of the candidate cell comprises: determining a frequency priority of at least one downlink carrier meeting the camping condition of the candidate cell according to the measurement result of the candidate cell; determining the priority order of the candidate cell according to the frequency priority of the at least one downlink carrier.

13. The method of claim 12, wherein, The determining the priority order of the candidate cell according to the frequency priority of the at least one downlink carrier comprises: determining the priority order of the candidate cell according to the frequency priority of a downlink carrier with the highest frequency priority in the at least one downlink carrier.

14. The method of claim 13, wherein, The determining the priority order of the candidate cell according to the frequency priority of the downlink carrier with the highest frequency priority in the at least one downlink carrier comprises: determining the priority order of the candidate cell according to the frequency priority of a downlink carrier with the highest frequency priority meeting the camping condition in the at least one downlink carrier.

15. The method of claim 1, wherein, The candidate cell comprises a second downlink carrier and a third downlink carrier, and the method further comprises: reselecting from the second downlink carrier to the third downlink carrier in a case where a second condition is met, the second downlink carrier being a downlink carrier on which the terminal camps; The second condition comprises at least one of: the second downlink carrier does not meet the camping condition, and the third downlink carrier meets the camping condition; a frequency priority of the third downlink carrier configured by a network side is higher than a frequency priority of the second downlink carrier, and the third downlink carrier meets the camping condition; receiving second indication information, the second indication information indicating that the terminal is switched from the second downlink carrier to the third downlink carrier meeting the camping condition; The frequency priority of the third downlink carrier determined according to the mobility information of the terminal is higher than the frequency priority of the second downlink carrier, and the third downlink carrier satisfies the camping condition.

16. The method of claim 15, wherein, Further comprising: receiving frequency priority configuration information of the third downlink carrier from the network side device; The frequency priority configuration information comprises at least two frequency priorities corresponding to different terminal mobility.

17. The method of claim 15 or 16, wherein, In the case that the terminal is of medium or high mobility, the frequency priority of the third downlink carrier is a first frequency priority; In the case that the terminal is of low mobility, the frequency priority of the third downlink carrier is a second frequency priority.

18. A cell selection or reselection method, performed by a network side device, the method comprising: sending first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, the first configuration information of each candidate cell comprising configuration information of a first downlink carrier for terminal cell selection and / or cell reselection, the first downlink carrier being one or more downlink carriers of the at least two downlink carriers of the candidate cell capable of providing camping service.

19. The method of claim 18, wherein, The first configuration information of the candidate cell comprises at least one of: measurement configuration corresponding to each first downlink carrier; frequency priority configuration of each first downlink carrier; random access resource configuration corresponding to each first downlink carrier; search space configuration corresponding to each first downlink carrier; paging configuration corresponding to each first downlink carrier; first indication information indicating whether the terminal is prohibited from accessing the network using the first downlink carrier.

20. The method of claim 19, wherein, The measurement configuration related to each first downlink carrier comprises at least one of: first threshold related configuration parameters and second threshold related configuration parameters; The first threshold is used by the terminal to determine whether the downlink signal strength of the first downlink carrier satisfies the camping condition; The second threshold is used by the terminal to determine whether the downlink signal quality of the first downlink carrier satisfies the camping condition.

21. The method of claim 20, wherein, The first threshold related configuration parameters comprise at least one of: a minimum signal strength value of the received signal; a preconfigured minimum signal strength offset; a preconfigured maximum terminal transmit power compensation; and a preconfigured temporary offset. And / or, the second threshold related configuration parameters comprise at least one of: a minimum signal quality value of the received signal; a preconfigured minimum signal quality offset; and a preconfigured temporary offset.

22. The method of claim 20 or 21, wherein, The first downlink carrier comprises at least two downlink carriers, and the at least two downlink carriers share at least part of the measurement configuration parameters.

23. The method of any one of claims 18 to 22, wherein, Further comprising: sending second indication information indicating that the terminal is switched from the second downlink carrier to a third downlink carrier satisfying the camping condition.

24. The method of claim 23, wherein, Further comprising: sending frequency priority configuration information of the third downlink carrier, the frequency priority configuration information comprising at least two frequency priorities corresponding to different terminal mobility.

25. The method of claim 24, wherein, In the case that the terminal is of medium or high mobility, the frequency priority of the second downlink carrier is a first frequency priority; In a case that the terminal is low mobility, the frequency priority of the second downlink carrier is a second frequency priority. 26.A cell selection or reselection apparatus, comprising: a first receiving module, configured to acquire first configuration information of at least one candidate cell, wherein the candidate cell comprises at least two downlink carriers, and the first configuration information of each candidate cell comprises configuration information of a first downlink carrier for terminal cell selection and / or cell reselection, wherein the first downlink carrier is one or more downlink carriers capable of providing camping services among the at least two downlink carriers of the candidate cell; a processing module, configured to perform cell selection processing or cell reselection processing based on the first configuration information of the at least one candidate cell.

27. The apparatus of claim 26, wherein, The first configuration information of the candidate cell comprises at least one of the following: measurement configuration corresponding to each first downlink carrier; frequency priority configuration of each first downlink carrier; random access resource configuration corresponding to each first downlink carrier; search space configuration corresponding to each first downlink carrier; paging configuration corresponding to each first downlink carrier; first indication information indicating whether to access the network using the first downlink carrier.

28. The apparatus of claim 27, wherein, The measurement configuration corresponding to each first downlink carrier comprises at least one of the following: first threshold related configuration parameters and second threshold related configuration parameters; wherein the first threshold is used by the terminal to determine whether the downlink signal strength of the first downlink carrier meets a camping condition; 29. The apparatus of claim 28, wherein, the second threshold is used by the terminal to determine whether the downlink signal quality of the first downlink carrier meets the camping condition. The first threshold related configuration parameters comprise at least one of the following:

30. The apparatus of claim 28 or 29, wherein, a minimum strength value of a received signal; 31. The apparatus of any one of claims 26 to 30, wherein, a preconfigured minimum signal strength offset; a preconfigured maximum terminal transmit power compensation; a preconfigured temporary offset. And / or, the second threshold related configuration parameters comprise at least one of the following: a minimum quality value of a received signal; 32. The apparatus of claim 31, wherein, a preconfigured minimum signal quality offset; a preconfigured temporary offset. The first downlink carrier comprises at least two downlink carriers, and the at least two downlink carriers share at least part of the parameters in the measurement configuration. The processing module is configured to: select the candidate cell as a camping cell in a case that the signal measurement value of at least one downlink carrier of the candidate cell determined according to the first configuration information meets a camping condition; 33. The apparatus of any one of claims 26 to 30, wherein, wherein the signal measurement value comprises at least one of the following: downlink signal strength and downlink signal quality; the camping condition comprises at least one of the following: the downlink signal strength of the at least one downlink carrier is higher than or equal to the first threshold; the downlink signal quality of the at least one downlink carrier is higher than or equal to the second threshold. The at least one downlink carrier is a downlink carrier capable of providing camping services. Wherein the camping services comprise at least one of the following: at least part of system message transmission services; random access services; paging services. The processing module is configured to: perform candidate cell measurement according to the first configuration information; perform at least one of the following according to the measurement result of the candidate cell: determine whether to trigger cell reselection; determining a candidate cell meeting the camping condition; performing cell reselection based on the candidate cell meeting the camping condition; determining a priority order of the candidate cells, the priority order indicating a priority of the candidate cells being selected as a camping cell by the terminal; performing cell reselection based on the priority order of the candidate cells.

34. A cell selection or reselection apparatus, comprising: a first sending module configured to send first configuration information of at least one candidate cell, the candidate cell comprising at least two downlink carriers, the first configuration information of each candidate cell comprising configuration information of a first downlink carrier for cell selection and / or cell reselection by a terminal, the first downlink carrier being one or more downlink carriers of the at least two downlink carriers of the candidate cell capable of providing camping services.

35. The apparatus of claim 34, wherein, the first configuration information of the candidate cell comprising at least one of: measurement configuration corresponding to each first downlink carrier; frequency priority configuration of each first downlink carrier; random access resource configuration corresponding to each first downlink carrier; search space configuration corresponding to each first downlink carrier; paging configuration corresponding to each first downlink carrier; first indication information indicating whether the terminal is prohibited from accessing the network using the first downlink carrier.

36. The apparatus of claim 35, wherein, the measurement configuration corresponding to each first downlink carrier comprising at least one of: a first threshold related configuration parameter and a second threshold related configuration parameter; wherein the first threshold is used by the terminal to determine whether a downlink signal strength of the first downlink carrier meets a camping condition; 37. The apparatus of claim 36, wherein, the second threshold is used by the terminal to determine whether a downlink signal quality of the first downlink carrier meets the camping condition. the first threshold related configuration parameter comprising at least one of:

38. The apparatus of claim 36 or 37, wherein, a minimum signal strength value of a received signal; a preconfigured minimum signal strength offset; a preconfigured maximum terminal transmit power compensation; and a preconfigured temporary offset.

39. The apparatus of any one of claims 34 to 38, wherein, and / or, the second threshold related configuration parameter comprising at least one of: a minimum signal quality value of a received signal; a preconfigured minimum signal quality offset; and a preconfigured temporary offset. the first downlink carrier comprising at least two downlink carriers, and the at least two downlink carriers sharing at least part of the measurement configuration. further comprising: a second sending module configured to send second indication information, the second indication information indicating that the terminal is switched from a second downlink carrier to a third downlink carrier meeting the camping condition.

40. A terminal comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implementing the steps of the cell selection or reselection method according to any one of claims 1 to 17.

41. A network side device comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implementing the steps of the cell selection or reselection method according to any one of claims 18 to 25.

42. A readable storage medium, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the cell selection or reselection method according to any one of claims 1 to 17, or implement the steps of the cell selection or reselection method according to any one of claims 18 to 25.

43. A computer program product comprising computer instructions, which, when executed by a processor, implement the steps of the cell selection or reselection method according to any one of claims 1 to 17, or implement the steps of the cell selection or reselection method according to any one of claims 18 to 25.

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