Cell selection method and device, storage medium, program product and communication equipment

Abstract

Disclosed in an embodiment of the present invention are a cell selection method and apparatus, a storage medium, a program product and a communication device, the method comprising: a terminal receiving first system information sent by a first network device, the first system information comprising information of M carriers and an identifier list of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support M carriers, and the first network device is any one of the M network devices; m is an integer greater than or equal to 2; and residing in a first service cell associated with a first identification list when determining that at least P carriers in the M carriers meet a cell residing criterion and identifications of M network devices corresponding to the M carriers belong to the first identification list, p is a positive integer less than or equal to M, and the first identifier list is an identifier list of M network devices associated with any one of the at least one service cell.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a cell selection method, apparatus, storage medium, program product, and communication equipment. Background Art

[0002] The wireless network of the future will be a network that is deeply integrated with the coordination of all frequency band resources, including low-frequency bands below 6GHz, mid-frequency bands, millimeter waves, terahertz, and visible light. It can meet the consistency requirements of user experience based on the dynamic complementarity of multiple frequency bands.

[0003] For the traditional cell selection process, after the terminal is turned on, it will first search for cells in a default frequency band and measure the reference signal corresponding to the download wave of the default frequency band. If the cell residence criteria are met, the terminal will reside in the cell under the default frequency band. For the remaining carriers in the multi-band fusion network, once the terminal measures that the signal quality of the remaining carriers is better than the signal quality of the default frequency band carrier, the terminal will reselect the cell and establish a connection with the remaining carriers. After that, the terminal will have no interaction with the default frequency band carrier or the remaining carriers in the multi-band fusion network. Subsequent data transmission can only be carried out through the carrier with the connection established. This obviously cannot meet the needs of flexible use of multiple frequency bands. Therefore, how to perform cell selection in the multi-band fusion network is a problem that needs to be solved. Summary of the Invention

[0004] To solve existing technical problems, embodiments of the present invention provide a cell selection method, apparatus, storage medium, program product, and communication device.

[0005] To achieve the above-mentioned purpose, the technical solution of the embodiment of the present invention is implemented as follows:

[0006] In a first aspect, an embodiment of the present invention provides a cell selection method, including:

[0007] The terminal receives first system information sent by a first network device, where the first system information includes information of M carriers and a list of identifiers of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support the M carriers, and the first network device is any one of the M network devices; and M is an integer greater than or equal to 2;

[0008] When it is determined that at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the M network devices corresponding to the M carriers belong to the first identifier list, reside in the first service cell associated with the first identifier list; P is a positive integer less than or equal to M, and the first identifier list is a list of identifiers of M network devices associated with any service cell among the at least one service cell.

[0009] In the above scheme, the method also includes: the terminal receives a first reference signal sent by the first network device through the first carrier, obtains a measurement result of the first reference signal corresponding to the first carrier and an identifier of the first network device; the first carrier is a carrier among the M carriers that carries the first system information; accordingly, the terminal receives the first system information sent by the first network device, including: the terminal receives the first system information based on the first reference signal.

[0010] In the above scheme, the method also includes: receiving second reference signals sent by multiple second network devices through their respective supported second carriers, obtaining measurement results of the second reference signals corresponding to each second carrier and an identifier of each second network device; the second carrier is any carrier among the M carriers except the first carrier, and the second network device is a network device that supports the second carrier.

[0011] In the above scheme, the method also includes: determining whether there are at least P carriers among the M carriers that meet the cell residence criteria based on the measurement results of the first reference signal corresponding to the first carrier and the measurement results of the second reference signals corresponding to each of the multiple second carriers; when it is determined that the at least P carriers meet the cell residence criteria, based on the identifier of the first network device and the identifiers of each of the multiple second network devices, determining the identifiers of the M network devices corresponding to the M carriers, and judging whether the identifiers of the at least P network devices belong to the first identifier list.

[0012] In the above scheme, the method also includes: when it is determined that the number of carriers among the M carriers that meet the cell residence criteria is less than P or the identifiers of the M network devices corresponding to the M carriers do not belong to the first identifier list, the terminal accesses a third network device, and the third network device is a network device among the M network devices, and the supported carriers meet the cell residence criteria.

[0013] In the above solution, the M carriers include multiple carriers belonging to the same frequency band and / or multiple carriers belonging to different frequency bands.

[0014] In the above solution, the measurement results include reference signal received power (RSRP) and reference signal received quality (RSRQ).

[0015] In the above solution, the identifier of the network device includes a physical cell identifier.

[0016] In a second aspect, an embodiment of the present invention further provides a cell selection method, including:

[0017] The first network device sends first system information, where the first system information includes information of M carriers and a list of identifiers of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support the M carriers; and M is an integer greater than or equal to 2.

[0018] The M carriers are used for the terminal to reside in a first serving cell associated with a first identifier list when it is determined that at least P carriers among the M carriers meet a cell residency criterion and identifiers of M network devices corresponding to the M carriers belong to a first identifier list; P is a positive integer less than or equal to M, and the first identifier list is a list of identifiers of M network devices associated with any serving cell among the at least one serving cell;

[0019] The first network device is any one of the M network devices.

[0020] In the above scheme, the method also includes: the first network device sends a first reference signal to the terminal through a first carrier, and the first reference signal is used by the terminal to obtain the measurement result of the first reference signal corresponding to the first carrier and the identifier of the first network device; the first carrier is the carrier among the M carriers that carries the first system information; accordingly, the first reference signal is also used by the terminal to receive the first system information.

[0021] In the above scheme, the information of the M carriers is used by the terminal to receive second reference signals sent by multiple second network devices through their respective supported second carriers, and obtain the measurement results of the second reference signals corresponding to each second carrier and the identifier of each second network device; the second carrier is any carrier among the M carriers except the first carrier, and the second network device is a network device that supports the second carrier.

[0022] In the above solution, the M carriers include multiple carriers belonging to the same frequency band and / or multiple carriers belonging to different frequency bands.

[0023] In the above solution, the measurement results include RSRP and RSRQ.

[0024] In the above solution, the identifier of the network device includes a physical cell identifier.

[0025] In a third aspect, an embodiment of the present invention further provides a cell selection device, which is applied to a terminal; the device includes a first communication unit and a first processing unit; wherein,

[0026] The first communication unit is configured to receive first system information sent by a first network device, the first system information including information of M carriers and a list of identifiers of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support the M carriers, the first network device is any one of the M network devices; and M is an integer greater than or equal to 2;

[0027] The first processing unit is configured to reside in a first service cell associated with the first identification list when it is determined that at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the M network devices corresponding to the M carriers belong to a first identification list; P is a positive integer less than or equal to M, and the first identification list is a list of identifiers of M network devices associated with any service cell among the at least one service cell.

[0028] In a fourth aspect, an embodiment of the present invention further provides a cell selection device, which is applied to a first network device; the device includes a second communication unit,

[0029] The second communication unit is configured to send first system information, where the first system information includes information of M carriers and a list of identifiers of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support the M carriers; and M is an integer greater than or equal to 2;

[0030] The M carriers are used for the terminal to reside in a first serving cell associated with a first identifier list when it is determined that at least P carriers among the M carriers meet a cell residency criterion and identifiers of M network devices corresponding to the M carriers belong to a first identifier list; P is a positive integer less than or equal to M, and the first identifier list is a list of identifiers of M network devices associated with any serving cell among the at least one serving cell;

[0031] The first network device is any one of the M network devices.

[0032] In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in the first or second aspect above.

[0033] In a sixth aspect, an embodiment of the present invention further provides a computer program product, comprising a computer program, which implements the steps of the method described in the first or second aspect when executed by a processor.

[0034] In the seventh aspect, an embodiment of the present invention also provides a communication device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method described in the first or second aspect are implemented.

[0035] An embodiment of the present invention provides a cell selection method, apparatus, storage medium, program product, and communication equipment, which can regard M carriers as a service cell. A terminal can reside in the service cell corresponding to the M carriers when at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the network devices corresponding to the M carriers belong to the identifier list of the same service cell. In this way, the terminal can access all network devices corresponding to this service cell, and achieve simultaneous access to multiple carriers. This can avoid the problem of the terminal first accessing the default carrier and then reselecting to the remaining carriers, resulting in complex signaling processes and large delays. At the same time, it ensures that the terminal can quickly and flexibly utilize multiple carriers in both idle and connected states, and can meet the user's multi-scenario needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the process of the cell selection method according to an embodiment of the present invention Figure 1 ;

[0037] Figure 2 Schematic diagram of the process of the cell selection method according to an embodiment of the present invention Figure 2 ;

[0038] Figure 3 A schematic diagram of an application scenario of the cell selection method according to an embodiment of the present invention;

[0039] Figure 4 A schematic diagram comparing various multi-band fusion networking technologies in related technologies;

[0040] Figure 5 This is a schematic diagram of considering carriers in different frequency bands as one serving cell in an embodiment of the present invention;

[0041] Figure 6 Schematic diagram of the composition structure of the cell selection device according to an embodiment of the present invention Figure 1 ;

[0042] Figure 7 Schematic diagram of the composition structure of the cell selection device according to an embodiment of the present invention Figure 2 ;

[0043] Figure 8 2 is a schematic structural diagram of a communication device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] Before describing the cell selection solution of the present invention, a brief introduction to the cell selection process in related art is first given.

[0045] In related technologies, cell selection refers to the process of selecting a cell with satisfying channel quality conditions as soon as possible after the terminal is powered on to reside in it. It mainly includes two categories: 1) Initial cell selection: The terminal does not store any prior information to help it identify a specific frequency, so the terminal needs to scan all radio frequency (RF) channels on the communication system frequency band according to its own capabilities. At each frequency, the terminal only needs to search for the cell with the best channel quality. Once a suitable cell appears, the terminal will select it and reside in it. 2) Cell selection based on stored information: The terminal has stored information related to the carrier frequency, and may also store some cell parameter information, such as previously received measurement control information or information obtained from previously resided / detected cells. The terminal will give priority to cells with relevant information. Once a suitable cell appears, the terminal will select it and reside in it. If none of the cells with stored relevant information are suitable, the terminal will initiate the initial cell selection process.

[0046] If a terminal wishes to camp on a cell, it must meet the cell camping criteria. If the terminal determines based on the cell reference signal measurement results that the cell camping criteria are met, such as the S criterion for cell selection, the terminal considers the cell to meet the channel quality requirements for cell selection and selects it as the camping cell. If the system information of the cell indicates that camping is allowed, the terminal will choose to camp on this cell and enter the idle state.

[0047] For cell selection in multiple frequency bands, for example, carriers F1, F2, and F3 correspond to three frequency bands respectively, the frequency of F1 is lower than the frequency of F2, the frequency of F2 is lower than the frequency of F3, and these three frequency bands do not share the same site. According to the cell selection process in the relevant technology, after the terminal is turned on, it will first search for cells in a default frequency band (such as the frequency band where F1 is located). If the terminal measures that the RSRP and RSRQ of the reference signal of F1 meet the S criterion, it will reside in the serving cell, and then reselect the cell by monitoring the signal quality of the F2 / F3 carrier and the F1 carrier. Once the terminal measures that the signal quality of the F2 carrier is better than that of the F1, it will reselect the F2 carrier and then establish an RRC connection through the F2 carrier. There will be no interaction between the terminal and the F1 / F3 carriers, and subsequent data transmission can only be through the F2 carrier. If the terminal wants to use the F1 and F3 carriers to transmit data, it must perform cell switching, which has a large delay.

[0048] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. These terms are simply used to distinguish one element (or threshold value or application or instruction or operation) from another element (or threshold value or application or instruction or operation). For example, a first operation can be referred to as a second operation, and a second operation can be referred to as a first operation without departing from the scope of the present invention. The first operation and the second operation are both operations, but they are not the same operation.

[0050] The term "and / or" in the embodiments of the present invention refers to any and all possible combinations of one or more of the associated listed items. It should also be noted that when used in this specification, "include / comprise" specifies the presence of the stated features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components and / or groups thereof.

[0051] The steps in the embodiments of the present invention do not necessarily have to be processed in the order of the described steps. The steps can be selectively rearranged, or the steps in the embodiments can be deleted, or the steps in the embodiments can be added as needed. The step descriptions in the embodiments of the present invention are only optional sequence combinations and do not represent all step sequence combinations in the embodiments of the present invention. The order of the steps in the embodiments cannot be considered as a limitation of the present invention.

[0052] The network devices involved in the various embodiments of the present invention may also be referred to as radio access network devices. The radio access network device may be: a base station, an evolved node B (eNB), a home base station, an access point (AP) in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a transmission and reception point (TRP), etc. It may also be a gNB in ​​a new radio (NR) system, or it may be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), a centralized unit (CU), a distributed unit (DU), or a roadside unit (RSU) with base station functions. The centralized unit may include a control plane (CU-CP) and a user plane (CU-UP). Alternatively, the network device may be a component or a part of the access network device, or a network device or network element logically located above the access network device, such as an artificial intelligence control / controller (AIC) or a wireless intelligent control / controller (RIC). It should be understood that in the embodiments of the present invention, the specific technology and specific device form adopted by the network device are not limited. In each embodiment of the present invention, the network device can provide communication coverage for a specific geographical area, and can communicate with terminals located in the coverage area (cell). In addition, when it is a vehicle network communication system, the network device can also be a vehicle-mounted device.

[0053] The terminal involved in each embodiment of the present invention may also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which is a device that provides voice and / or data connectivity to users. For example, the terminal may be a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: smart phones, pocket personal computers (PPC), handheld computers, personal digital assistants (PDA), laptop computers, tablet computers, wearable devices, or vehicle-mounted devices, etc. In addition, when it is a vehicle network communication system, the terminal device may also be a vehicle-mounted device. It should be understood that the embodiments of the present invention do not limit the specific technology and specific device form adopted by the terminal.

[0054] An embodiment of the present invention provides a cell selection method. Figure 1 Schematic diagram of the process of the cell selection method according to an embodiment of the present invention Figure 1 ,like Figure 1 As shown, the method includes:

[0055] Step 101: A terminal receives first system information sent by a first network device, where the first system information includes information of M carriers and a list of identifiers of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support the M carriers, and the first network device is any one of the M network devices; and M is an integer greater than or equal to 2.

[0056] Step 102: When it is determined that at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the M network devices corresponding to the M carriers belong to a first identifier list, reside in the first service cell associated with the first identifier list; P is a positive integer less than or equal to M, and the first identifier list is a list of identifiers of M network devices associated with any service cell among the at least one service cell.

[0057] In this embodiment, each of the at least one serving cell is associated with M network devices, and the identifiers of the M network devices associated with each serving cell constitute an identifier list associated with each serving cell; the M network devices associated with different serving cells are different, for example, not identical or completely different, but the M network devices associated with each serving cell support M carriers. It can be understood that each of the at least one serving cell in the present invention is a virtual cell supporting M carriers, and each serving cell supports the M carriers based on the M network devices associated with the serving cell.

[0058] In some embodiments, the M carriers are carriers that share a BBU or a BBU pool. Exemplarily, the network device may be an RRU or an AAU, and the M network devices supporting the M carriers in each serving cell use the same BBU or the same BBU pool.

[0059] In step 101, the terminal obtains a list of identifiers associated with each serving cell in at least one serving cell through first system information sent by any one of the M network devices, where the list of identifiers associated with each serving cell includes the identifiers of the M network devices associated with the serving cell. Exemplarily, the identifier of the network device includes, for example, a physical cell identifier (PCI), and the list of identifiers associated with each serving cell may be a list of PCIs of the network devices corresponding to each serving cell.

[0060] As an example, the first system information may include identification information of each serving cell in the at least one serving cell and a list of identifications of M network devices associated with each serving cell.

[0061] In some embodiments, the first network device is a network device corresponding to a first carrier among the M carriers, and the first carrier is, for example, a carrier of a default frequency band of a terminal.

[0062] In some embodiments, the terminal receiving first system information sent by a first network device may include: the terminal receiving a system information block (SIB) 1 sent by the first network device, where the SIB1 includes the first system information.

[0063] In step 102, the terminal may perform reference signal measurement on at least P of the M carriers based on information about the M carriers, and determine, based on the reference signal measurement results of each of the at least P carriers, whether at least P of the M carriers meet a cell residency criterion, and whether the identifiers of the M network devices corresponding to the M carriers belong to a list of identifiers corresponding to the at least one serving cell; P is less than or equal to M. Exemplarily, the reference signal measurement results include RSRP and RSRQ corresponding to the reference signal.

[0064] In some embodiments, the method may further include: performing reference signal measurement on the at least P carriers based on the information of the M carriers, obtaining reference signal measurement results corresponding to each of the at least P carriers and identifiers of at least P network devices that respectively support the at least P carriers.

[0065] As an example, the information of the M carriers may include bandwidth, frequency, initial uplink bandwidth part (BWP), initial downlink BWP, random access related configuration parameters, etc. The reference signal is, for example, an SSB signal.

[0066] The cell selection method of this embodiment regards M carriers as a service cell. The terminal can reside in the service cell corresponding to the M carriers when at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the network devices corresponding to the M carriers all belong to the identifier list of the same service cell. In this way, the terminal can access all network devices corresponding to this service cell and achieve simultaneous access to multiple carriers. This can avoid the problem of the terminal first accessing the default carrier and then reselecting to other carriers, resulting in complex signaling processes and large delays. At the same time, it ensures that the terminal can quickly and flexibly utilize multiple carriers in both idle and connected states, which can meet the user's multi-scenario needs.

[0067] In an optional embodiment of the present invention, the M carriers include multiple carriers belonging to the same frequency band and / or multiple carriers belonging to different frequency bands. That is, the M carriers in this embodiment can be carriers belonging to the same frequency band or carriers belonging to different frequency bands.

[0068] Exemplarily, the M carriers include carriers belonging to the first frequency band and / or carriers belonging to the second frequency band. For example, the M carriers include carriers F1, F2, and F3. Carriers F1 and F2 may belong to the 3.5 GHz frequency band, and carrier F3 may belong to the 1.8 GHz frequency band. Thus, the terminal can simultaneously reside on carriers in multiple frequency bands, or simultaneously reside on different carriers in the same frequency band, thereby meeting various service requirements.

[0069] In an optional embodiment of the present invention, the method may also include: the terminal receives a first reference signal sent by the first network device through a first carrier, obtains a measurement result of the first reference signal corresponding to the first carrier and an identifier of the first network device; the first carrier is a carrier among the M carriers that carries the first system information; accordingly, the terminal receives the first system information sent by the first network device, including: the terminal receives the first system information based on the first reference signal.

[0070] Exemplarily, the first carrier is a carrier in a first frequency band, where the first frequency band is, for example, a carrier in a default frequency band of the terminal, where the first frequency band is, for example, a low-frequency band with wide coverage.

[0071] In this embodiment, the terminal receives a first reference signal through a first carrier, and may obtain a measurement result of the first reference signal corresponding to the first carrier and an identifier of a first network device supporting the first carrier. Simultaneously, the terminal may also obtain the first system information based on the first reference signal, for example, SIB1 indicated by the first reference signal includes the first system information. Exemplarily, the first reference signal is, for example, a first synchronization broadcast block (SSB, Synchronization Signal and PBCH block).

[0072] As an optional implementation manner, the measurement result of the first reference signal corresponding to the first carrier in this embodiment can be used by the terminal to select whether to access at least one service cell that supports the M carriers. For example, the terminal continues to search for the remaining carriers among the M carriers, and resides in the service cell associated with the identifier list when at least P carriers among them meet the cell residence criteria and the identifiers of the M network devices corresponding to the M carriers belong to any service cell associated identifier list. It should be noted that the measurement result of the first reference signal corresponding to the first carrier in this embodiment does not affect the terminal's access to the corresponding service cell. It is only necessary that at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the M network devices corresponding to the M carriers belong to any service cell associated identifier list. That is to say, even if the reference signal measurement result of the first carrier does not meet the cell residence criteria, the terminal can continue to search for the remaining carriers of the M carriers and decide whether to finally access the corresponding service cell according to the reference signal measurement results of multiple carriers.

[0073] In some embodiments, the measurement result includes RSRP and RSRQ. Exemplarily, the terminal measures and obtains the RSRP and RSRQ of a reference signal on the first carrier, such as the RSRP and RSRQ of the first SSB.

[0074] In the cell selection method of an embodiment of the present invention, a terminal can receive a first reference signal on a first carrier, obtain first system information based on the first reference signal, thereby obtaining information of a service cell supporting M carriers, and further realizing simultaneous residence on multiple carriers. The information of a multi-carrier fusion cell can be obtained only through the first reference signal on the first carrier, thereby greatly reducing signaling overhead.

[0075] In an optional embodiment of the present invention, the method may further include: receiving second reference signals sent by multiple second network devices through their respective supported second carriers, obtaining a measurement result of the second reference signal corresponding to each second carrier and an identifier of each second network device; the second carrier is any carrier among the M carriers except the first carrier, and the second network device is a network device that supports the second carrier.

[0076] In this embodiment, the terminal first obtains first system information based on the first reference signal on the first carrier, and then determines information of M carriers supported by the at least one serving cell based on the first system information. Thus, the terminal can search for the remaining carriers except the first carrier in the M carriers, and obtain reference signal measurement results of the remaining carriers based on the second reference signals sent by each network device on the remaining carriers, which are used by the terminal to access the corresponding serving cell according to step 102.

[0077] In an optional embodiment of the present invention, the method may further include: determining whether there are at least P carriers among the M carriers that meet the cell residence criteria based on the measurement results of the first reference signal corresponding to the first carrier and the measurement results of the second reference signals corresponding to each of the multiple second carriers; when it is determined that the at least P carriers meet the cell residence criteria, based on the identifier of the first network device and the identifiers of each of the multiple second network devices, determining the identifiers of the M network devices corresponding to the M carriers, and judging whether the identifiers of the M network devices belong to the first identifier list.

[0078] In this embodiment, the terminal selects whether to reside in the serving cell by determining whether at least P carriers among the M carriers meet the cell residency criteria, and determining whether the identifiers of the M network devices corresponding to the M carriers belong to any identifier list associated with at least one serving cell.

[0079] Exemplarily, the cell residency criterion is, for example, the S criterion for cell selection, and the reference signal measurement result corresponding to the carrier is, for example, the RSRP and RSRQ of the reference signal. The terminal may determine whether the reference signal measurement result corresponding to each carrier satisfies:

[0080] Srxlev> and Squal>0

[0081] Where Srxlev represents the RSRP value received during cell selection, and Squal represents the RSRQ value received during cell selection, which can be obtained by the following formulas:

[0082] Srxlev=Q rxlevmeas -(Q rxlevmin +Q rxlevminoffset )-P compensation

[0083] -Q offsettemp

[0084] Squal=Q qualmeas -(Q qualmin +Q qualminoffset )-Q offsettemp

[0085] Among them, Q offsettemp Indicates the penalty factor introduced for cells with multiple T300 timeouts, that is, the terminal sends RRCSetupRequest (RRC establishment request) on the cell multiple times but does not receive the RRCSetup message; Q rxlevmeas Indicates the RSRP value of the cell actually measured by the terminal; Q qualmeas Indicates the cell RSRQ value actually measured by the terminal; Q rxlevmin Indicates the minimum RSRP value for cell access. The larger the value configured for the cell, the more difficult it will be for the cell to meet the cell residency criteria, and the more difficult it will be for the UE to choose to reside in the cell; Q qualmin Indicates the minimum RSRQ value for cell access; Q rxlevminoffset Indicates the minimum RSRP offset value for cell access; Q qualminoffset Indicates the minimum RSRQ offset value for cell access; P compensation Indicates the difference between the maximum transmit power allowed by the network and the maximum transmit power of the terminal power level.

[0086] That is to say, if the terminal determines that the reference signal measurement result corresponding to a certain carrier satisfies Srxlev> and Squal>0, it can be determined that the carrier meets the cell residence criteria. When the terminal determines that at least P carriers meet the cell residence criteria, it continues to determine whether the identifiers of the M network devices corresponding to the M carriers belong to any identifier list associated with at least one serving cell.

[0087] Exemplarily, taking M=3 as an example, the list of identifiers of the three network devices associated with each of the at least one serving cell may include identifier 1 of network device a, identifier 2 of network device b, and identifier 3 of network device c associated with serving cell A, and identifier 1 of network device a, identifier 4 of network device d, and identifier 3 of network device c associated with serving cell B. Network device a may support carrier F1, network device b and network device d may support carrier F2, and network device c may support carrier F3.

[0088] Taking P = 2 as an example, if terminal UE1 receives SSBs sent by network devices a, b, and c, it can measure the reference signal quality of each of the SSBs sent, and determine that the network device identifiers corresponding to the measured carriers F1, F2, and F3 are 1, 2, and 3, respectively. If the measured carriers F1 and F3 both meet the cell residency criteria, the terminal can determine that identifiers 1, 2, and 3 belong to the identifier list associated with serving cell A, and terminal UE1 can access serving cell A. If terminal UE2 receives SSBs sent by network devices a, e, and c, and network device e also supports carrier F2, the terminal can measure the reference signal quality of carriers F1 and F2, first determine whether both carriers meet the cell residency criteria, and then determine whether the network device identifiers corresponding to the three carriers belong to any identifier list associated with at least one serving cell. Since the identifier of network device e does not belong to the identifier list associated with serving cell A or serving cell B, the terminal cannot access serving cell A or B.

[0089] Based on the foregoing embodiment, an embodiment of the present invention further provides a cell selection method. In this embodiment, the method may further include: upon determining that the number of carriers among the M carriers that meet the cell residency criteria is less than P or the identifiers of the M network devices corresponding to the M carriers do not belong to the first identifier list, the terminal accessing a third network device, where the third network device is a network device among the M network devices that supports carriers that meet the cell residency criteria.

[0090] In this embodiment, when the terminal does not meet the corresponding camping conditions of the serving cell, it can choose to access any network device that meets the cell camping criteria, that is, return to the normal cell access process.

[0091] Exemplarily, the terminal determines that the first carrier meets the cell residence criteria based on the reference signal measurement result corresponding to the first carrier, and may access the first network device corresponding to the first carrier when it is determined that the number of carriers that meet the cell residence criteria among the M carriers is less than P or the identifiers of the M network devices corresponding to the M carriers do not belong to any identifier list associated with at least one service cell.

[0092] An embodiment of the present invention also provides a cell selection method. Figure 2 Schematic diagram of the process of the cell selection method according to an embodiment of the present invention Figure 2 ,like Figure 2 As shown, the method includes:

[0093] Step 201: A first network device sends first system information, where the first system information includes information of M carriers and a list of identifiers of M network devices associated with at least one service cell; wherein the M network devices associated with each service cell respectively support the M carriers; M is an integer greater than or equal to 2; the M carriers are used by the terminal to reside in the first service cell associated with the first identifier list when it is determined that at least P carriers among the M carriers meet the cell residency criteria and the identifiers of the M network devices corresponding to the M carriers belong to the first identifier list; P is a positive integer less than or equal to M, and the first identifier list is a list of identifiers of M network devices associated with any service cell in the at least one service cell; wherein the first network device is any network device among the M network devices.

[0094] The detailed description of step 201 in the embodiment of the present invention can refer to the relevant description of step 101 in the aforementioned embodiment, and will not be repeated here to save space.

[0095] The cell selection method of the embodiment of the present invention regards M carriers as a service cell. The network device can send a list of identifiers of the M network devices associated with each service cell to the terminal. The M network devices associated with each service cell are all network devices that support the M carriers. As a result, the terminal can reside in the service cell corresponding to the M carriers when at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the network devices corresponding to the M carriers belong to the identifier list of the same service cell. The terminal can access all network devices corresponding to this service cell, achieving simultaneous access to multiple carriers, avoiding the problem of complex signaling processes and large delays caused by the terminal first accessing the default carrier and then reselecting to other carriers. At the same time, it ensures that the terminal can quickly and flexibly utilize multiple carriers in both idle and connected states, which can meet the user's multi-scenario needs.

[0096] In an optional embodiment of the present invention, the method may also include: the first network device sends a first reference signal to the terminal through a first carrier, and the first reference signal is used by the terminal to obtain a measurement result of the first reference signal corresponding to the first carrier and an identifier of the first network device; the first carrier is a carrier among the M carriers that carries the first system information; accordingly, the first reference signal is also used by the terminal to receive the first system information.

[0097] In an optional embodiment of the present invention, the information of the M carriers is used by the terminal to receive second reference signals transmitted by multiple second network devices via respective supported second carriers, and to obtain a measurement result of the second reference signal corresponding to each second carrier and an identifier of each second network device; the second carrier is any carrier other than the first carrier among the M carriers, and the second network device is a network device supporting the second carrier. Exemplarily, the information of the M carriers may include the bandwidth, frequency, initial uplink BWP, initial downlink BWP, random access-related configuration parameters, etc. of each carrier.

[0098] In an optional embodiment of the present invention, the M carriers include multiple carriers belonging to the same frequency band and / or multiple carriers belonging to different frequency bands. In this embodiment, the M carriers can be carriers belonging to the same frequency band or carriers belonging to different frequency bands.

[0099] In an optional embodiment of the present invention, the measurement result includes RSRP and RSRQ. Exemplarily, the reference signal measurement result corresponding to each carrier includes the RSRP and RSRQ of the reference signal of the corresponding carrier, such as the RSRP and RSRQ of the SSB on the carrier.

[0100] In an optional embodiment of the present invention, the identifier of the network device includes a PCI. Exemplarily, the first system information may include the PCI of each of the M network devices associated with each serving cell.

[0101] The cell selection scheme of the embodiment of the present invention is described below with reference to specific application scenarios.

[0102] This example is for three carriers (M is 3), namely carriers F1, F2 and F3, where the frequency of carrier F1 is lower than the frequency of carrier F2, and the frequency of carrier F2 is lower than the frequency of carrier F3. The conditions for the terminal to access the service cells corresponding to these three carriers are: the three carriers (i.e., P is 3) meet the cell residence criteria, and the identifiers of the network devices corresponding to the three carriers belong to any identifier list associated with at least one service cell. Figure 3 FIG. 1 is a schematic diagram of an application scenario of the cell selection method according to an embodiment of the present invention. Figure 3 As shown, network device 31, network device 32, network device 33, network device 34, and network device 35 are five network devices that share a BBU or a BBU pool. Among them, network device 31 supports carrier F1, network device 32 and network device 34 both support carrier F2, and network device 33 and network device 35 both support carrier F3. Figure 3 Indicated by different dotted lines.

[0103] After being powered on, the terminals 41, 42, 43, and 44 in this example can receive the SSB (i.e., the first reference signal) through the carrier F1 (i.e., the first carrier in the aforementioned embodiment), and can obtain the reference signal measurement result corresponding to the carrier F1, such as the RSRP and RSRQ of the SSB, and the identifier of the network device 31 corresponding to the carrier F1 (e.g., identifier 1); further, the terminals 41 to 44 can read the SIB1 message (i.e., the first system information) to obtain a combination of identifier lists of the various network devices belonging to the same serving cell. Table 1 is an example table of an identifier list associated with at least one serving cell in an embodiment of the present invention. Refer to Tables 1 and Figure 3 , the terminal can determine that the identification list corresponding to service cell 1 includes identification 1 of network device 31, identification 2 of network device 32 and identification 3 of network device 33, which support carrier F1, carrier F2 and carrier F3 respectively; the identification list corresponding to service cell 2 includes identification 1 of network device 31, identification 2 of network device 32 and identification 5 of network device 35, the identification list corresponding to service cell 3 includes identification 1 of network device 31, identification 4 of network device 34 and identification 3 of network device 33, and the identification list corresponding to service cell 4 includes identification 1 of network device 31, identification 4 of network device 34 and identification 5 of network device 35, that is, service cells 1 to 4 all support the aforementioned carriers F1, F2 and F3.

[0104] Table 1

[0105]

[0106] Reference Figure 3 Terminal 41 measures the reference signal qualities of carriers F2 and F3, and obtains identifier 2 of network device 32 and identifier 3 of network device 33; terminal 42 measures the reference signal qualities of carriers F2 and F3, and obtains identifier 4 of network device 34 and identifier 3 of network device 33; terminal 43 measures the reference signal qualities of carriers F2 and F3, and obtains identifier 4 of network device 34 and identifier 5 of network device 35; terminal 44 measures the reference signal qualities of carriers F2 and F3, and obtains identifier 2 of network device 32 and identifier 5 of network device 35. In this example, the RSRP and RSRQ of the reference signals of carriers F2 and F3 measured by terminals 41 and 42, respectively, both meet the cell residency criteria, while the RSRP and RSRQ of the reference signals of carriers F2 and F3 measured by terminals 43 and 44, respectively, both do not meet the cell residency criteria.

[0107] For terminal 41, the RSRP and RSRQ corresponding to carriers F1, F2 and F3 all meet the cell residence criteria, and the corresponding identifier 1, identifier 2 and identifier 3 constitute the identifier list corresponding to service cell 1, then terminal 41 can choose to access service cell 1; for terminal 42, the RSRP and RSRQ of carriers F1, F2 and F3 all meet the cell residence criteria, and the corresponding identifier 1, identifier 4 and identifier 3 constitute the identifier list corresponding to service cell 3, then terminal 42 can choose to access service cell 3; for terminals 43 and 44, the RSRP and RSRQ of carrier F1 all meet the cell residence criteria, but the RSRP and RSRQ of carriers F2 and F3 do not meet the cell residence criteria, the terminal does not reside in any service cell, or can access the network device 31 corresponding to carrier F1.

[0108] In related technologies, multi-band fusion networking technologies include carrier aggregation (CA), dual-connectivity (DC), supplementary uplink (SUL), etc. Figure 4 This is a comparison diagram of various multi-band fusion networking technologies in related technologies, such as Figure 4 As shown, the uplink (UL) and SUL belong to different frequency bands (or frequency bands, wavebands) band0 and band1 respectively, but both belong to the same cell (for example Figure 4 In the cell Cell#0 in the figure, the terminal can only choose to use UL or SUL to send uplink data at the same time, and cannot send data in UL and SUL at the same time. CA is carrier aggregation between different cells, for example Figure 4 In the cells Cell#0 and Cell#1, data is split and aggregated at the Media Access Control (MAC) layer. One MAC layer can correspond to different physical layers (PHY). DC is dual connectivity to different base stations, for example Figure 4 The master cell group (MCG) and secondary cell group (SCG) in the network split and aggregate data at the packet data convergence protocol (PDCP) layer, and have their own radio link layer control protocol (RLC) / MAC / PHY.

[0109] Related technologies have introduced different multi-band converged networking technologies based on varying technical and deployment requirements. These diverse data offload and transmission control mechanisms lead to different signaling processes, resulting in high signaling overhead and complex protocols. Furthermore, CA / DC / SUL technologies are still based on the traditional cellular network architecture, with fixed site locations and limited flexibility, and cannot fully decouple uplink and downlink (DL) carriers.

[0110] For terminals that support CA / DC, the terminal must first establish an RRC connection with the main carrier or main node, and then activate the secondary carrier or secondary node. The delay is relatively large. At the same time, the failure of the wireless link of the main carrier or main node will cause the terminal to be disconnected from the network, and all communications will be terminated (even if the secondary carrier or secondary node link is still intact). It cannot meet the requirements of extremely low-latency services, and the switching of the main carrier or main node caused by terminal mobility will also cause communication interruption (even if the secondary carrier or secondary node link is still intact), and the delay of switching to the target cell is relatively large. Furthermore, the large delay makes it impossible for the base station to dynamically and quickly disconnect, and the interruption cannot quickly adapt to service changes, resulting in high energy consumption. On the other hand, CA and DC only have benefits for connected terminals, while idle and inactive terminals cannot enjoy this benefit. SUL is applicable to idle and inactive terminals, but only supports one SUL carrier.

[0111] It can be seen that the multi-band fusion networking technology in related technologies has problems such as complex protocol design, large delay of primary and auxiliary concepts, and high energy consumption.

[0112] Figure 5 FIG. 1 is a schematic diagram of treating carriers of different frequency bands as a serving cell in an embodiment of the present invention. Figure 5 As shown, this example can combine multiple frequency bands (such as Figure 5 The carriers of band0, band1, band2 and band3 in the network are regarded as a service cell, eliminating the main and auxiliary concepts in the relevant technologies, and the terminal can use the carriers on multiple spectrums more efficiently and flexibly in both idle and inactive states. It can be understood that this example regards M carriers (of the same frequency band or different frequency bands) as a service cell. When P (≤M) or more carriers among the M carriers meet the cell residence criteria and the identifiers of the M network devices corresponding to the M carriers belong to the identifier list associated with any service cell, the terminal chooses to reside in the corresponding service cell and will access multiple network devices corresponding to the service cell, which can achieve simultaneous residence of multiple carriers supported by multiple network devices, avoiding the problem of long delay in traditional carrier aggregation of first establishing a connection with the main carrier and then adding an activated auxiliary cell. At the same time, it also ensures that the terminal can quickly and flexibly utilize multiple carriers in both idle and connected states, which can meet the user's multi-scenario needs.

[0113] An embodiment of the present invention provides a cell selection device, which is applied to a terminal; Figure 6 Schematic diagram of the composition structure of the cell selection device according to an embodiment of the present invention Figure 1 ,like Figure 6 As shown, the cell selection device 500 includes a first communication unit 501 and a first processing unit 502; wherein,

[0114] The first communication unit 501 is configured to receive first system information sent by a first network device, where the first system information includes information of M carriers and a list of identifiers of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support the M carriers, and the first network device is any one of the M network devices; and M is an integer greater than or equal to 2;

[0115] The first processing unit 502 is configured to reside in a first service cell associated with the first identification list when it is determined that at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the M network devices corresponding to the M carriers belong to a first identification list; P is a positive integer less than or equal to M, and the first identification list is a list of identifiers of M network devices associated with any service cell among the at least one service cell.

[0116] In an optional embodiment of the present invention, the first communication unit 501 is further used to receive a first reference signal sent by the first network device through a first carrier, and obtain a measurement result of the first reference signal corresponding to the first carrier and an identifier of the first network device; the first carrier is a carrier among the M carriers that carries the first system information; accordingly, the first communication unit is used to receive the first system information based on the first reference signal.

[0117] In an optional embodiment of the present invention, the first communication unit 501 is further used to receive second reference signals sent by multiple second network devices through their respective supported second carriers, obtain a measurement result of the second reference signal corresponding to each second carrier and an identifier of each second network device; the second carrier is any carrier among the M carriers except the first carrier, and the second network device is a network device that supports the second carrier.

[0118] In an optional embodiment of the present invention, the first processing unit 502 is configured to determine whether at least P carriers among the M carriers meet the cell residency criteria based on the measurement result of the first reference signal corresponding to the first carrier and the measurement results of the second reference signals corresponding to each of the multiple second carriers; and, when it is determined that the at least P carriers meet the cell residency criteria, determine the identifiers of the M network devices corresponding to the M carriers based on the identifier of the first network device and the identifiers of each of the multiple second network devices, and judge whether the identifiers of the M network devices belong to the first identifier list.

[0119] In an optional embodiment of the present invention, the first processing unit 502 is further configured to access a third network device when it is determined that the number of carriers among the M carriers that meet the cell residency criteria is less than P or the identifiers of the M network devices corresponding to the M carriers do not belong to the first identifier list, where the third network device is a network device among the M network devices whose supported carriers meet the cell residency criteria.

[0120] In an optional embodiment of the present invention, the M carriers include multiple carriers belonging to the same frequency band and / or multiple carriers belonging to different frequency bands.

[0121] In an optional embodiment of the present invention, the measurement result includes reference signal received power RSRP and reference signal received quality RSRQ.

[0122] In an optional embodiment of the present invention, the identifier of the network device includes a physical cell identifier.

[0123] In an embodiment of the present invention, the first processing unit 502 in the cell selection device 500 can be implemented in actual applications by a central processing unit (CPU), a digital signal processor (DSP), a microcontroller unit (MCU) or a programmable gate array (FPGA) in the terminal; the first communication unit 501 in the cell selection device 500 can be implemented in actual applications by a communication module (including: a basic communication kit, an operating system, a communication module, a standardized interface and protocol, etc.) and a transceiver antenna.

[0124] An embodiment of the present invention further provides a cell selection device, which is applied to a first network device; Figure 7 Schematic diagram of the composition structure of the cell selection device according to an embodiment of the present invention Figure 2 ,like Figure 7As shown, the cell selection device 600 includes a second communication unit 601,

[0125] The second communication unit 601 is used to send first system information, which includes information of M carriers and a list of identifiers of M network devices associated with at least one service cell; wherein the M network devices associated with each service cell respectively support the M carriers; M is an integer greater than or equal to 2; the M carriers are used for the terminal to reside in the first service cell associated with the first identifier list when it is determined that at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the M network devices corresponding to the M carriers belong to the first identifier list; P is a positive integer less than or equal to M, and the first identifier list is a list of identifiers of M network devices associated with any service cell in the at least one service cell; wherein the first network device is any network device among the M network devices.

[0126] In an optional embodiment of the present invention, the second communication unit 601 is further used to send a first reference signal to the terminal through a first carrier, where the first reference signal is used by the terminal to obtain a measurement result of the first reference signal corresponding to the first carrier and an identifier of the first network device; the first carrier is a carrier among the M carriers that carries the first system information; accordingly, the first reference signal is also used by the terminal to receive the first system information.

[0127] In an optional embodiment of the present invention, the information of the M carriers is used by the terminal to receive second reference signals sent by multiple second network devices through their respective supported second carriers, and obtain a measurement result of the second reference signal corresponding to each second carrier and an identifier of each second network device; the second carrier is any carrier among the M carriers except the first carrier, and the second network device is a network device that supports the second carrier.

[0128] In an optional embodiment of the present invention, the M carriers include multiple carriers belonging to the same frequency band and / or multiple carriers belonging to different frequency bands.

[0129] In an optional embodiment of the present invention, the measurement result includes RSRP and RSRQ.

[0130] In an optional embodiment of the present invention, the identifier of the network device includes a physical cell identifier.

[0131] In an embodiment of the present invention, the second communication unit 601 in the cell selection device 600 can be implemented in actual applications through the communication module (including: basic communication suite, operating system, communication module, standardized interface and protocol, etc.) and transceiver antenna in the first network device.

[0132] It should be noted that the cell selection device provided in the above embodiment only uses the division of the above program modules as an example to illustrate cell selection. In actual applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the above-described processing. In addition, the cell selection device provided in the above embodiment and the cell selection method embodiment are based on the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0133] An embodiment of the present invention also provides a communication device. Figure 8 7 is a schematic structural diagram of a communication device according to an embodiment of the present invention. For example, the communication device 700 may be a terminal or a network device (eg, a first network device) in the aforementioned embodiment. Figure 8 The communication device 700 shown includes: at least one processor 701, a memory 702 and at least one network interface 703. The various components in the communication device 700 are coupled together via a bus system 704. It is understood that the bus system 704 is used to achieve connection and communication between these components. In addition to including a data bus, the bus system 704 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, the bus system 704 is not described in detail. Figure 8 Various buses are labeled as bus system 704 .

[0134] It is understood that memory 702 can be volatile memory or non-volatile memory, or can include both volatile and non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), ferromagnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disk, or compact disc read-only memory (CD-ROM); magnetic surface memory can be magnetic disk memory or tape memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM).The memory 702 described in the embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

[0135] The memory 702 in the embodiment of the present invention is used to store various types of data to support the operation of the communication device 700. Examples of such data include any computer program for operating on the communication device 700, such as the program of the cell selection method in the embodiment of the present invention.

[0136] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by processor 701. Processor 701 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in processor 701 or by software instructions. Processor 701 may be a general-purpose processor, a DSP, or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. Processor 701 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules within the decoding processor. The software modules may be located in a storage medium located in memory 702. Processor 701 reads information from memory 702 and, in conjunction with its hardware, completes the steps of the above method.

[0137] In an exemplary embodiment, the communication device 700 may be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), FPGAs, general-purpose processors, controllers, MCUs, microprocessors, or other electronic components to perform the aforementioned method.

[0138] In an exemplary embodiment, the present invention further provides a computer-readable storage medium, such as a memory 702 including a computer program. The computer program can be executed by the processor 701 of the communication device 700 to perform the steps of the aforementioned method. The computer-readable storage medium can be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface mount storage, optical disk, or CD-ROM; or various devices including any one or any combination of the aforementioned memories, such as a mobile phone, computer, tablet device, personal digital assistant, etc.

[0139] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0140] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0141] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0142] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0143] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0144] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0145] Those skilled in the art will appreciate that all or part of the steps of the above-mentioned method embodiments may be implemented by hardware associated with program instructions, and the aforementioned program may be stored in a computer-readable storage medium. When the program is executed, the program executes the steps of the above-mentioned method embodiments. The aforementioned storage medium includes various media that can store program codes, such as mobile storage devices, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0146] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

[0147] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A cell selection method, characterized in that: The method comprises: The terminal receives first system information sent by a first network device, where the first system information includes information of M carriers and a list of identifiers of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support the M carriers, and the first network device is any one of the M network devices; and M is an integer greater than or equal to 2; When it is determined that at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the M network devices corresponding to the M carriers belong to the first identifier list, reside in the first service cell associated with the first identifier list; P is a positive integer less than or equal to M, and the first identifier list is a list of identifiers of M network devices associated with any service cell among the at least one service cell.

2. The method according to claim 1, characterized in that The method further comprises: The terminal receives a first reference signal sent by the first network device through a first carrier, and obtains a measurement result of the first reference signal corresponding to the first carrier and an identifier of the first network device; the first carrier is a carrier among the M carriers that carries the first system information; Accordingly, the terminal receives the first system information sent by the first network device, including: The terminal receives the first system information based on the first reference signal.

3. The method according to claim 2, characterized in that The method further comprises: Receive second reference signals sent by multiple second network devices through second carriers supported by each of the second network devices, and obtain a measurement result of the second reference signal corresponding to each second carrier and an identifier of each second network device; the second carrier is any carrier among the M carriers except the first carrier, and the second network device is a network device that supports the second carrier.

4. The method according to claim 3, characterized in that The method further comprises: determining, based on a measurement result of a first reference signal corresponding to the first carrier and a measurement result of a second reference signal corresponding to each of a plurality of second carriers, whether at least P carriers among the M carriers meet a cell residency criterion; When it is determined that the at least P carriers meet the cell residency criteria, based on the identifier of the first network device and the respective identifiers of multiple second network devices, the identifiers of the M network devices corresponding to the M carriers are determined, and it is determined whether the identifiers of the M network devices belong to the first identifier list.

5. The method according to claim 1, characterized in that The method further comprises: When it is determined that the number of carriers among the M carriers that meet the cell residence criteria is less than P or the identifiers of the M network devices corresponding to the M carriers do not belong to the first identifier list, the terminal accesses a third network device, where the third network device is a network device among the M network devices and the supported carriers meet the cell residence criteria.

6. The method according to any one of claims 1 to 5, characterized in that The M carriers include multiple carriers belonging to the same frequency band and / or multiple carriers belonging to different frequency bands.

7. The method according to any one of claims 2 to 4, characterized in that The measurement results include reference signal received power RSRP and reference signal received quality RSRQ.

8. The method according to any one of claims 1 to 5, characterized in that The identifier of the network device includes a physical cell identifier.

9. A cell selection method, characterized in that: The method comprises: The first network device sends first system information, where the first system information includes information of M carriers and a list of identifiers of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support the M carriers; and M is an integer greater than or equal to 2. The M carriers are used for the terminal to reside in a first serving cell associated with a first identifier list when it is determined that at least P carriers among the M carriers meet a cell residency criterion and identifiers of M network devices corresponding to the M carriers belong to a first identifier list; P is a positive integer less than or equal to M, and the first identifier list is a list of identifiers of M network devices associated with any serving cell among the at least one serving cell; The first network device is any one of the M network devices.

10. The method according to claim 9, characterized in that The method further comprises: The first network device sends a first reference signal to the terminal through a first carrier, where the first reference signal is used by the terminal to obtain a measurement result of the first reference signal corresponding to the first carrier and an identifier of the first network device; the first carrier is a carrier among the M carriers that carries the first system information; Correspondingly, the first reference signal is also used by the terminal to receive the first system information.

11. The method according to claim 10, characterized in that The information of the M carriers is used by the terminal to receive second reference signals sent by multiple second network devices through their respective supported second carriers, and obtain a measurement result of the second reference signal corresponding to each second carrier and an identifier of each second network device; the second carrier is any carrier among the M carriers except the first carrier, and the second network device is a network device that supports the second carrier.

12. The method according to any one of claims 9 to 11, characterized in that The M carriers include multiple carriers belonging to the same frequency band and / or multiple carriers belonging to different frequency bands.

13. The method according to claim 10 or 11, characterized in that The measurement results include RSRP and RSRQ.

14. The method according to any one of claims 9 to 11, characterized in that The identifier of the network device includes a physical cell identifier.

15. A cell selection device, characterized in that: The device is applied to a terminal; the device includes a first communication unit and a first processing unit; wherein, The first communication unit is configured to receive first system information sent by a first network device, the first system information including information of M carriers and a list of identifiers of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support the M carriers, the first network device is any one of the M network devices; and M is an integer greater than or equal to 2; The first processing unit is configured to reside in a first service cell associated with the first identification list when it is determined that at least P carriers among the M carriers meet the cell residence criteria and the identifiers of the M network devices corresponding to the M carriers belong to a first identification list; P is a positive integer less than or equal to M, and the first identification list is a list of identifiers of M network devices associated with any service cell among the at least one service cell.

16. A cell selection device, characterized in that: The device is applied to a first network device; the device includes a second communication unit, The second communication unit is configured to send first system information, where the first system information includes information of M carriers and a list of identifiers of M network devices associated with at least one serving cell; wherein the M network devices associated with each serving cell respectively support the M carriers; and M is an integer greater than or equal to 2; The M carriers are used for the terminal to reside in a first serving cell associated with a first identifier list when it is determined that at least P carriers among the M carriers meet a cell residency criterion and identifiers of M network devices corresponding to the M carriers belong to a first identifier list; P is a positive integer less than or equal to M, and the first identifier list is a list of identifiers of M network devices associated with any serving cell among the at least one serving cell; The first network device is any one of the M network devices.

17. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 8 are implemented; or, when the program is executed by a processor, the steps of the method described in any one of claims 9 to 14 are implemented.

18. A computer program product comprising a computer program, characterized in that The computer program implements the steps of the method according to any one of claims 1 to 8 when executed by a processor; or, the computer program implements the steps of the method according to any one of claims 9 to 14 when executed by a processor.

19. A communication device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the method according to any one of claims 1 to 8 are implemented; or, when the processor executes the program, the steps of the method according to any one of claims 9 to 14 are implemented.

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