Cell camping method, information sending method and device

Abstract

A cell camping method, information sending method and device, the cell camping method comprising: a terminal receiving cell selection related system information and / or cell reselection related system information of a multi-carrier cell; the terminal determining whether to camp on a corresponding cell. The present application sends the cell selection related system information and / or the cell reselection related system information of the multi-carrier cell to the terminal through the network, can provide support for the terminal to implement cell selection and / or reselection under a multi-carrier service cell, so that the terminal camps on a suitable cell.

Description

Technical Field

[0001] This invention relates to the field of mobile communication technology, specifically to a cell dwelling method, an information transmission method, and a device. Background Technology

[0002] Compared to the C-band, the Sub-3GHz band has lower penetration loss, resulting in better coverage. However, unlike the C-band, the Sub-3GHz band is fragmented and allocated to different operators, resulting in a relatively narrow spectrum bandwidth. Almost all operators worldwide possess multiple Sub-3GHz bands (such as 700MHz, 800MHz, 900MHz, 1.4GHz, 1.8GHz, 2.1GHz, 2.3GHz, and 2.6GHz). Aggregating these fragmented carriers into a larger bandwidth would lead to a significant improvement in throughput performance.

[0003] Currently, Carrier Aggregation (CA) and Supplementary Uplink (SUL) are two effective solutions for aggregating spectrum. However, CA treats each carrier as an independent serving cell, with each carrier deployed independently. Frequency Division Duplex (FDD) bands deployed at the same site and in close proximity have similar time-frequency information, path loss, coupling loss, Reference Signal Received Power (RSRP), and Quasi-co-location (QCL). However, independent carrier management introduces unnecessary control signaling overhead, unnecessary synchronization, cell addition / deletion / activation / measurement / mobility procedures, and consequently, additional latency. Furthermore, CA only provides a gain for connected UEs; idle and inactive UEs do not benefit from this gain. In contrast, the SUL scheme only supports one SUL carrier. Based on these considerations, the industry has proposed a scheme to aggregate multiple sub-3GHz frequency bands into a single serving cell, namely a multi-carrier serving cell, in order to use discontinuous spectrum more efficiently and flexibly.

[0004] In traditional solutions, a cell has only one downlink carrier frequency, and the terminal only measures and calculates one RSRP and RSRQ value when performing cell selection and cell reselection. However, in multi-carrier serving cell scenarios, a single cell may have multiple downlink carrier frequencies, and the terminal can measure multiple RSRP and RSRQ values ​​for different carrier frequencies within a single cell. In this scenario, traditional cell selection and cell reselection methods are no longer applicable. Summary of the Invention

[0005] At least one embodiment of the present invention provides a cell camping method, an information transmission method, and an apparatus for implementing cell camping in multi-carrier cells.

[0006] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0007] In a first aspect, embodiments of the present invention provide a cell dwelling method, including:

[0008] The terminal receives system information related to cell selection and / or cell reselection for multi-carrier cells;

[0009] The terminal determines whether to camp on the corresponding cell;

[0010] The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; and M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria.

[0011] The system information related to cell reselection includes at least one of the following: carrier level threshold, carrier level second threshold, carrier priority within the cell, carrier with the same priority as the cell carrier, third value X, and parameters of the carrier level related to cell reselection; wherein, X is an integer greater than or equal to 1; X represents that when the terminal is camped in a multi-carrier cell, if the first X carriers sorted by carrier priority are inferior to the first signal quality condition, cell reselection is triggered;

[0012] The multi-carrier cell is a cell with multiple downlink carrier frequencies.

[0013] Optionally, the parameters for selecting the relevant carrier frequency class in the cell selection include at least one of the following parameters: the minimum allowed received level value on the target carrier frequency, the minimum allowed received quality value on the target carrier frequency, the carrier frequency class offset value when selecting the Public Land Mobile Network (PLMN), and the offset value used on the target carrier frequency when the Radio Resource Control (RRC) connection establishment fails.

[0014] The parameters of the cell reselection related carrier frequency level include at least one of the following parameters: carrier frequency level cell reselection hysteresis value, carrier frequency level temporary offset, cell-level offset for the target carrier frequency, and frequency-level offset for the target carrier frequency.

[0015] The target carrier frequency is one or more carrier frequencies of the multi-carrier cell.

[0016] Optionally, if the terminal is not currently camped on any cell, determining whether to camp on the corresponding cell includes:

[0017] Based on the system information related to cell selection of the multi-carrier cell, determine whether the multi-carrier cell meets the preset multi-carrier cell selection criteria;

[0018] If the preset multi-carrier cell selection criteria are met, it is determined to camp on the multi-carrier cell;

[0019] The multi-carrier cell selection criteria include at least one of the following:

[0020] The S-value on one carrier frequency of the multi-carrier cell is greater than the first threshold.

[0021] The S-values ​​on the N carrier frequencies of the multi-carrier cell are greater than the second threshold.

[0022] The S-values ​​on the M high-priority carriers of the multi-carrier cell are greater than the third threshold.

[0023] Wherein, the S value is the cell selection reception level value and / or cell selection signal reception quality value on the carrier frequency, and the high priority carrier frequency is a carrier frequency with a priority higher than a preset priority.

[0024] Optionally, the cell selection receive level value Srxlev,f and the cell selection signal receive quality value Squal,f on carrier frequency f are calculated according to the following formulas:

[0025] Srxlev,f=Q rxlevmeas,f –(Q rxlevmin,f +Q rxlevminoffset,f )–P compensation -Qoffset temp,f

[0026] Squal,f=Q qualmeas,f –(Q qualmin,f +Q qualminoffset,f -Qoffset temp,f

[0027] Among them: Q rxlevmeas,f Select the receive level value for the cell measured on carrier frequency f;

[0028] Q qualmeas,f Select the cell signal reception quality value measured on carrier frequency f;

[0029] Q rxlevmin,f This is the minimum allowed received signal level value for the multi-carrier cell on carrier frequency f;

[0030] Q qualmin,fThis represents the minimum acceptable reception quality value for the multi-carrier cell on carrier frequency f.

[0031] Q rxlevminoffset,f and Q qualminoffset,f The carrier frequency offset value considered when the terminal is normally residing on the VPLMN and searching for a higher priority PLMN;

[0032] P compensation These are terminal-level compensation parameters;

[0033] Qoffset temp,f The offset value used on carrier frequency f when RRC connection establishment fails.

[0034] Optionally, when the terminal is currently camped in the first multi-carrier cell, determining whether to camp on the corresponding cell includes at least one of the following:

[0035] If the priority of the first carrier frequency is higher than the highest priority of the first multi-carrier cell, and there is a first cell on the carrier frequency with the first priority that satisfies the multi-carrier cell selection criterion or the single-carrier cell selection criterion, then it is determined to reselect to the first cell.

[0036] When the signal of the first multi-carrier cell is inferior to the first signal quality condition, the following judgment process is performed on each carrier of the first multi-carrier cell in the order of priority of each carrier frequency, until it is determined that the cell will be reselected to the second cell or all carrier frequencies have been judged: it is determined whether there is a second cell that meets the first preset condition on the carrier frequency with the same priority as the current carrier frequency of the first multi-carrier cell. If there is, it is determined that the cell will be reselected to the second cell. The first preset condition includes: frequency-level cell reselection criteria, and multi-carrier cell selection criteria or single-carrier cell selection criteria.

[0037] If the signal quality of the first multi-carrier cell is inferior to that of the second multi-carrier cell, and if the priority of the second carrier frequency is lower than the lowest priority of the first multi-carrier cell, and there is a third cell on the carrier frequency of the second carrier frequency priority that satisfies the multi-carrier cell selection criterion or the single-carrier cell selection criterion, then it is determined to reselect to the third cell.

[0038] Optionally, the frequency-level cell reselection criterion is: the R value of the first multi-carrier cell on the current carrier frequency, and the R value of the second cell on a carrier frequency with the same priority as the current carrier frequency, satisfy the cell reselection criterion;

[0039] The single-carrier frequency cell selection criterion is that the S-value on the cell carrier frequency is greater than the fourth threshold.

[0040] The multi-carrier cell selection criteria include at least one of the following:

[0041] The S-value on one carrier frequency of the multi-carrier cell is greater than the first threshold.

[0042] The S-values ​​on the N carrier frequencies of the multi-carrier cell are greater than the second threshold.

[0043] The S-values ​​on the M high-priority carriers of the multi-carrier cell are greater than the third threshold.

[0044] Wherein, S is the cell selection receive level value and / or cell selection signal receive quality value, and the high priority carrier frequency is a carrier frequency with a priority higher than a preset priority.

[0045] Optionally, the R value R of the first multi-carrier cell on the first carrier frequency f1 s,f1 The R value R of the second cell on the second carrier frequency f2, which has the same priority as the first carrier frequency f1. n,f2 Calculate according to the following formulas respectively:

[0046] R s,f1 =Q meas,s,f1 +Q Hyst,f1 -Qoffset temp,f1

[0047] R n,f2 =Q meas,n,f2 –Q offset,f2 -Qoffset temp,f2

[0048] Among them, Q meas,s,f1 The RSRP value of the first multi-carrier cell measured by the terminal on the first carrier frequency f1;

[0049] Q meas,n,f2 The RSRP value of the second cell on the second carrier frequency f2 as measured by the terminal;

[0050] Q Hyst,f1 The cell reselection hysteresis value on the first carrier frequency f1;

[0051] Qoffset temp,f1 The offset value temporarily added on the first carrier frequency f1;

[0052] Qoffset temp,f2 The offset value temporarily added on the second carrier frequency f2;

[0053] Q offset,f2 When the first carrier frequency f1 and the second carrier frequency f2 are the same, if Qoffset s,n,f2 If valid, it equals Qoffset. s,n,f2 Otherwise, it is 0; when f1 and f2 are different frequencies, if Qoffset s,n,f2If valid, it equals Qoffset. s,n,f2 +Qoffset frequency,f1 Otherwise, it equals Qoffset. frequency Among them, Qoffset s,n,f2 When both the first multi-carrier cell and the second cell are on carrier frequency f2, the cell-level offset applied for carrier frequency f2; Qoffset frequency,f1 It is a frequency level offset applied to f1 when f2 and f1 have the same priority.

[0054] Optionally, the carrier level threshold includes a first carrier level threshold and a second carrier level threshold;

[0055] The signal quality of the first multi-carrier cell is inferior to that of the first signal quality condition, specifically:

[0056] The signal quality of all carrier frequencies in the first multi-carrier cell is lower than the first threshold value of the corresponding carrier frequency level;

[0057] Alternatively, the signal quality of at least one carrier frequency in the first multi-carrier cell is lower than the corresponding carrier frequency level first threshold value, wherein the at least one carrier frequency is a pre-specified carrier frequency, or the top X carrier frequencies sorted by priority.

[0058] The signal quality of the first multi-carrier cell is inferior to that of the second signal quality condition, specifically:

[0059] The signal quality of all carrier frequencies in the first multi-carrier cell is lower than the second threshold value of the corresponding carrier frequency level.

[0060] Optionally, the signal quality of the carrier frequency includes:

[0061] Select a receive level value for the cell on the carrier frequency, and / or select a signal reception quality value for the cell on the carrier frequency.

[0062] Optional, also includes:

[0063] The terminal receives system information related to cell access, wherein the system information related to cell access includes at least one of the following:

[0064] First indication information used to indicate whether a terminal is allowed to access the cell via the target carrier frequency;

[0065] Second indication information used to indicate whether the terminal is allowed to perform same-frequency reselection on the target carrier frequency;

[0066] Third indication information used to indicate the list of PLMNs supported by the target carrier frequency;

[0067] The fourth indication information is used to indicate the tracking area identifier (TAC) corresponding to the target carrier frequency.

[0068] Optionally, before determining whether to camp on the corresponding cell, the method further includes:

[0069] Based on the system information related to cell access, determine whether intra-frequency reselection can be performed and / or whether to camp on the corresponding cell.

[0070] Secondly, embodiments of the present invention provide an information sending method, the method comprising:

[0071] The network-side equipment sends system information related to cell selection and / or cell reselection for multi-carrier cells to the terminal; among which...

[0072] The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria.

[0073] The system information related to cell reselection includes at least one of the following: carrier level threshold, carrier level second threshold, carrier priority within the cell, carrier with the same priority as the cell carrier, third value X, and parameters of the carrier level related to cell reselection; wherein, X is an integer greater than or equal to 1; X represents that among the multi-carrier cells currently camped by the terminal, if the top X carriers sorted by carrier priority are inferior to the first signal quality condition, cell reselection is triggered;

[0074] The multi-carrier cell is a cell with multiple downlink carrier frequencies.

[0075] Optionally, the carrier frequency threshold includes:

[0076] Used to determine whether the signal of the multi-carrier cell currently camped by the terminal is inferior to a first threshold value of the carrier level under the first signal quality condition; and / or,

[0077] The carrier level second threshold value is used to determine whether the signal of the multi-carrier cell where the terminal is currently camped is inferior to the second signal quality condition.

[0078] Optionally, the parameters for selecting the relevant carrier frequency class in the cell selection include at least one of the following parameters: the minimum allowed received level value on the target carrier frequency, the minimum allowed received quality value on the target carrier frequency, the carrier frequency class offset value when it involves the selection of the Public Land Mobile Network (PLMN), and the offset value used on the target carrier frequency when the Radio Resource Control (RRC) connection establishment fails.

[0079] The parameters of the cell reselection related carrier frequency level include at least one of the following parameters: carrier frequency level cell reselection hysteresis value, carrier frequency level temporary offset, cell-level offset for the target carrier frequency, and frequency-level offset for the target carrier frequency.

[0080] The target carrier frequency is one or more carrier frequencies of the multi-carrier cell.

[0081] Optional, also includes:

[0082] Sending cell access-related system information to the terminal, wherein the cell access-related system information includes at least one of the following:

[0083] First indication information used to indicate whether a terminal is allowed to access the cell via the target carrier frequency;

[0084] Second indication information used to indicate whether the terminal is allowed to perform same-frequency reselection on the target carrier frequency;

[0085] Third indication information used to indicate the list of PLMNs supported by the target carrier frequency;

[0086] The fourth indication information is used to indicate the tracking area identifier (TAC) corresponding to the target carrier frequency.

[0087] Thirdly, embodiments of the present invention provide a terminal, including a transceiver and a processor, wherein...

[0088] The transceiver is used to receive system information related to cell selection and / or cell reselection of multi-carrier cells.

[0089] The processor is used to determine whether to camp on the corresponding cell; wherein,

[0090] The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria.

[0091] The system information related to cell reselection includes at least one of the following: a first threshold value for carrier frequency level, a second threshold value for carrier frequency level, carrier frequency priority within the cell, carrier frequencies with the same priority as the cell carrier frequency, a third value X, and parameters of the carrier frequency level related to cell reselection; wherein, X is an integer greater than or equal to 1, and X represents the minimum number of third-class carrier frequencies in the cell currently camped by the terminal that meet the first signal condition when cell reselection is triggered;

[0092] The multi-carrier cell is a cell with multiple downlink carrier frequencies.

[0093] Fourthly, embodiments of the present invention provide a terminal, including: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in the first aspect.

[0094] Fifthly, embodiments of the present invention provide a network-side device, including a transceiver and a processor, wherein...

[0095] The transceiver is used to send system information related to cell selection and / or cell reselection for multi-carrier cells to the terminal; wherein...

[0096] The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria.

[0097] The system information related to cell reselection includes at least one of the following: a first threshold value for carrier frequency level, a second threshold value for carrier frequency level, carrier frequency priority within the cell, carrier frequencies with the same priority as the cell carrier frequency, a third value X, and parameters of the carrier frequency level related to cell reselection; wherein, X is an integer greater than or equal to 1, and X represents the minimum number of third-class carrier frequencies in the cell currently camped by the terminal that meet the first signal condition when cell reselection is triggered;

[0098] The multi-carrier cell is a cell with multiple downlink carrier frequencies.

[0099] In a sixth aspect, embodiments of the present invention provide a network-side device, including: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method described in the second aspect.

[0100] In a seventh aspect, embodiments of the present invention provide a computer-readable storage medium storing a program that, when executed by a processor, implements the steps of the method described above.

[0101] Compared with the prior art, the cell camping method, information transmission method and device provided in the embodiments of the present invention transmit system information related to cell selection and / or cell reselection of multi-carrier cells to the terminal through the network, which can provide support for the terminal to realize cell selection and / or reselection under multi-carrier serving cells, so that the terminal camps on a suitable cell. Attached Figure Description

[0102] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0103] Figure 1 This is a schematic diagram of an application scenario according to an embodiment of the present invention;

[0104] Figure 2 A flowchart illustrating the application of the cell-based camping method provided in this embodiment of the invention to the terminal side;

[0105] Figure 3 A flowchart illustrating the information transmission method provided in this embodiment of the invention when applied to the base station side;

[0106] Figure 4 This is a schematic diagram of the structure of a terminal according to an embodiment of the present invention;

[0107] Figure 5 This is a schematic diagram of the structure of a terminal according to another embodiment of the present invention;

[0108] Figure 6 This is a schematic diagram of the structure of a network-side device according to an embodiment of the present invention;

[0109] Figure 7 This is a schematic diagram of the structure of a network-side device according to another embodiment of the present invention;

[0110] Figure 8 This is a schematic diagram of the structure of a terminal according to another embodiment of the present invention;

[0111] Figure 9 This is a schematic diagram of the structure of a network-side device according to another embodiment of the present invention. Detailed Implementation

[0112] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0113] The terms “first,” “second,” etc., used in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. The terms “and / or” in the specification and claims indicate at least one of the connected objects.

[0114] The technologies described in this document are not limited to NR systems and Long Time Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in various 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), and other systems. The terms "system" and "network" are often used interchangeably. CDMA systems can implement radio technologies such as CDMA2000 and Universal Terrestrial Radio Access (UTRA). UTRA includes Wideband Code Division Multiple Access (WCDMA) and other CDMA variants. TDMA systems can implement radio technologies such as the Global System for Mobile Communication (GSM). OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolution-UTRA (E-UTRA), IEEE 802.21 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDM. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and more advanced LTE (such as LTE-A) are newer versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called 3rd Generation Partnership Project 2 (3GPP2).The techniques described herein can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. However, the following description describes NR systems for illustrative purposes, and NR terminology is used in most of the following description, although these techniques can also be applied to applications beyond NR systems.

[0115] The following description provides examples and is not intended to limit the scope, applicability, or configuration set forth in the claims. Changes may be made to the function and arrangement of the elements discussed without departing from the spirit and scope of this disclosure. Various procedures or components may be appropriately omitted, substituted, or added to the examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0116] Please see Figure 1 , Figure 1 This diagram illustrates a block diagram of a wireless communication system applicable to an embodiment of the present invention. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 can also be referred to as a user terminal or user equipment (UE). The terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), mobile internet device (MID), wearable device, or in-vehicle device, etc. It should be noted that the specific type of terminal 11 is not limited in this embodiment of the present invention. Network device 12 can be a base station and / or a core network element. The base station can be a 5G or later version base station (e.g., gNB, 5G NR NB, etc.), or a base station in other communication systems (e.g., eNB, WLAN access point, or other access point, etc.). The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in the embodiments of the present invention, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0117] The base station can communicate with terminal 11 under the control of a base station controller, which in various examples may be part of the core network or some base stations. Some base stations may communicate control information or user data with the core network via backhaul. In some examples, some of these base stations may communicate with each other directly or indirectly via backhaul links, which may be wired or wireless communication links. The wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multi-carrier transmitter can transmit modulated signals on multiple carriers simultaneously. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal may be transmitted on a different carrier and may carry control information (e.g., reference signals, control channels, etc.), overhead information, data, etc.

[0118] The base station can wirelessly communicate with terminal 11 via one or more access point antennas. Each base station can provide communication coverage for its respective coverage area. The coverage area of ​​an access point can be divided into sectors that constitute only a part of that coverage area. The wireless communication system may include different types of base stations (e.g., macro base stations, micro base stations, or pico base stations). Base stations may also utilize different radio technologies, such as cellular or WLAN radio access technologies. Base stations may be associated with the same or different access networks or operator deployments. The coverage areas of different base stations (including coverage areas of the same or different types of base stations, coverage areas using the same or different radio technologies, or coverage areas belonging to the same or different access networks) may overlap.

[0119] Communication links in a wireless communication system may include an uplink for carrying uplink (UL) transmissions (e.g., from terminal 11 to network device 12) or a downlink for carrying downlink (DL) transmissions (e.g., from network device 12 to terminal 11). UL transmissions may also be referred to as reverse link transmissions, and DL transmissions may also be referred to as forward link transmissions. Downlink transmissions may be carried out using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions may be carried out using licensed frequency bands, unlicensed frequency bands, or both.

[0120] The following is a brief explanation of cell selection and cell reselection in the existing technology.

[0121] In traditional solutions, a cell has only one downlink carrier frequency. When performing cell selection and cell reselection, the terminal typically only measures and calculates one RSRP and one Reference Signal Received Quality (RSRQ) value. However, in multi-carrier cell scenarios, a cell may have multiple downlink carrier frequencies, allowing the terminal to measure multiple RSRP and RSRQ values ​​for different carrier frequencies within a single cell. In this scenario, traditional cell selection and cell reselection methods are no longer applicable. The multi-carrier cell discussed in this paper specifically refers to a cell with multiple downlink carrier frequencies.

[0122] The traditional methods for selecting and reselecting neighborhoods are as follows:

[0123] The purpose of cell selection is to enable the UE to select a cell with satisfactory channel quality as soon as possible after power-on. Cell selection mainly includes two categories: initial cell selection and cell selection based on stored information. In the initial cell selection process, the UE needs to search for the strongest cell on each carrier frequency based on its own capabilities and calculate whether the cell on that carrier frequency meets the S criterion. Once a suitable cell is found, the UE will camp on that cell. The S criterion for cell selection is as follows:

[0124] Srxlev>0 AND Squal>0, where:

[0125] Srxlev=Q rxlevmeas –(Q rxlevmin +Q rxlevminoffset )–P compensation -Qoffset temp

[0126] Squal = Q qualmeas –(Q qualmin +Q qualminoffset -Qoffset temp

[0127] Of the above parameters:

[0128] Srxlev represents the received signal level during cell search, such as RSRP;

[0129] Squal represents the quality of the received signal during cell search;

[0130] Q rxlevmeas This indicates the measured received signal level value of the selected cell.

[0131] Q rxlevmin Indicates the minimum received level;

[0132] Q rxlevminoffset This represents the offset value of the minimum received level;

[0133] P compensation Indicates terminal-level compensation parameters;

[0134] Qoffset temp This indicates the offset value used when an RRC connection establishment fails.

[0135] Q qualmeas This indicates the measured cell selected receive signal quality value, such as RSRQ;

[0136] Q qualmin Indicates the minimum received signal quality;

[0137] Q qualminoffset This represents the offset value indicating the minimum received signal quality.

[0138] Cell reselection aims to ensure the UE camps on a cell with better signal quality. While camping on a cell, the UE will continuously perform measurements on that cell. The UE measures the serving cell's RSRP value Srxlev. For high-priority frequencies in different frequencies or systems, the UE always performs inter-frequency / inter-system measurements. If the inter-frequency priority is lower than the current serving carrier priority, and the serving cell's Srxlev > Srxlev, the UE will continue to perform measurements. nonIntraSearchP If the UE does not perform inter-frequency measurements, then inter-frequency low-priority cell measurements need to be enabled. If the serving cell Srxlev > S... IntraSearchP The UE does not perform intra-frequency measurements. For cell reselection in the same frequency or with the same frequency priority, the R criterion is used. During cell reselection, the RSRP is typically measured. Candidate cells are ranked according to signal quality using the R criterion, and the optimal cell is selected, as follows:

[0139] R s =Q meas,s +Q Hyst -Qoffset temp

[0140] R n =Q meas,n –Q offset -Qoffset temp

[0141] Among them, Q meas,s This represents the measured RSRP value of the serving cell;

[0142] Q Hyst This indicates the cell reselection hysteresis value.

[0143] Qoffset temp This represents the temporarily added offset value;

[0144] Q meas,nThis represents the measured RSRP value of the candidate cell;

[0145] Q offset Indicates an offset value;

[0146] If a candidate cell is ranked higher than the serving cell, and the duration exceeds the Treslection threshold, and the UE camps on the current serving cell for more than a certain duration (e.g., 1 second), then the UE will reselect the candidate cell.

[0147] After the introduction of multi-carrier serving cells, a cell selection and reselection scheme is needed for multi-carrier serving cells. This invention provides a cell selection and reselection method applicable to multi-carrier serving cell scenarios and designs relevant system information to better support this application scenario.

[0148] Specifically, embodiments of the present invention:

[0149] For cell selection: Frequency-level cell selection parameters are incorporated into the S-criteria calculation. The UE can calculate the S-values ​​of a multi-carrier cell on different frequency bands based on these parameters, and determine whether the multi-carrier cell is suitable for camping based on the proposed multi-carrier cell selection criteria. This avoids the problem of the UE failing to select a multi-carrier cell due to the S-value of the currently measured carrier frequency not meeting the requirements, ensuring that the UE can select a cell that meets the cell selection criteria more quickly.

[0150] Regarding cell reselection: In existing technologies, intra-frequency cell reselection involves only one frequency, while in multi-carrier cells, intra-frequency involves multiple frequencies. How to perform cell reselection among these multiple intra-frequency frequencies and their corresponding frequencies of equal priority is not considered in existing technologies. To address this issue, a cell reselection triggering condition and an R criterion based on frequency-level parameters are designed to avoid unnecessary cell reselection processes caused by the UE not meeting the quality threshold requirements of a single carrier frequency, ensuring that the UE camps on cells that meet the quality requirements as much as possible.

[0151] Please refer to Figure 2 The present invention provides a cell camping method, which, when applied to the terminal side, includes:

[0152] Step 21: The terminal receives system information related to cell selection and / or cell reselection for multi-carrier cells.

[0153] In this embodiment of the invention, the terminal receives the aforementioned system information sent by a network-side device (such as a base station). The multi-carrier cell is a cell with multiple downlink carrier frequencies. The cell selection-related system information may include at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and intra-cell carrier frequency priority; wherein, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria. The first-class carrier frequency refers to a carrier frequency in the multi-carrier cell whose S-value is greater than a second threshold; the second-class carrier frequency refers to a high-priority carrier frequency in the multi-carrier cell whose S-value is greater than a third threshold. The S-value is the cell selection reception level value and / or cell selection signal reception quality value on the carrier frequency; the high-priority carrier frequency is a carrier frequency with a priority higher than a preset priority. Intra-cell carrier frequency priority refers to the priority of each carrier frequency.

[0154] More specifically,

[0155] The parameters for selecting the relevant carrier frequency class in the cell include at least one of the following: the minimum allowed received signal level on the target carrier frequency, the minimum allowed received signal quality on the target carrier frequency, the carrier frequency offset value when selecting the Public Land Mobile Network (PLMN), and the offset value used on the target carrier frequency when Radio Resource Control (RRC) connection establishment fails. The target carrier frequency is one or more carrier frequencies of the multi-carrier cell.

[0156] The system information related to cell reselection includes at least one of the following: carrier level threshold, carrier level second threshold, intra-cell carrier priority, carrier with the same priority as the cell carrier, third value X, and parameters of the carrier level related to cell reselection; wherein, X is an integer greater than or equal to 1; X indicates that when the terminal is camped in a multi-carrier cell, if the first X carriers sorted by carrier priority are inferior to the first signal quality condition, cell reselection is triggered.

[0157] More specifically, the carrier level threshold includes a first carrier level threshold and / or a second carrier level threshold, i.e.:

[0158] Used to determine whether the signal of the multi-carrier cell currently camped by the terminal is inferior to a first threshold value of the carrier level under the first signal quality condition; and / or,

[0159] The carrier level second threshold value is used to determine whether the signal of the multi-carrier cell where the terminal is currently camped is inferior to the second signal quality condition.

[0160] The parameters of the cell reselection related carrier frequency level include at least one of the following parameters: carrier frequency level cell reselection hysteresis value, carrier frequency level temporary offset, cell-level offset for the target carrier frequency, and frequency-level offset for the target carrier frequency; the target carrier frequency is one or more carrier frequencies of the multi-carrier cell.

[0161] Additionally, it should be noted that the various carrier frequency parameters in this article, such as carrier frequency offset, carrier frequency cell reselection hysteresis, and carrier frequency temporary offset, are all parameters set for the corresponding carrier frequency.

[0162] Step 22: The terminal determines whether to camp on the corresponding cell.

[0163] Here, the terminal can determine whether to camp on the corresponding cell based on the system information received in step 21. For example, if the terminal is not currently camped on any cell, it can determine whether to camp on the corresponding cell based on the cell selection information of the multi-carrier cell. Alternatively, if the terminal is already camped on a cell, it can determine whether to reselect to the corresponding cell based on the cell reselection information of the multi-carrier cell.

[0164] Through the above steps, the embodiments of the present invention send system information related to cell selection and / or cell reselection of multi-carrier cells to the terminal via the network, which can provide support for the terminal to perform cell selection and / or reselection under multi-carrier serving cells, so that the terminal can camp on a suitable cell.

[0165] For example, the above embodiments incorporate frequency-level cell selection parameters into the S-criteria calculation. The UE can calculate the S-values ​​of a multi-carrier cell on different frequency bands based on these parameters, and determine whether the multi-carrier cell can be camped based on the proposed multi-carrier cell selection criteria. This avoids the problem of the UE failing to select a multi-carrier cell due to the S-value of the currently measured carrier frequency not meeting the requirements, allowing the UE to select a cell that meets the cell selection criteria more quickly. The cell selection process will be explained in more detail below.

[0166] If the terminal is not currently camped on any cell, step 22 above, which determines whether to camp on the corresponding cell, specifically includes:

[0167] a) Based on the system information related to cell selection of the multi-carrier cell, determine whether the multi-carrier cell meets the preset multi-carrier cell selection criteria. The multi-carrier cell selection criteria include at least one of the following:

[0168] (1) The S value on one carrier frequency of the multi-carrier cell is greater than the first threshold. That is, as long as the S value of one carrier frequency in the multi-carrier cell is greater than the first threshold, the multi-carrier cell selection criterion is considered to be met.

[0169] (2) The S value on the N carrier frequencies of the multi-carrier cell is greater than the second threshold.

[0170] (3) The S value on the M high priority carriers of the multi-carrier cell is greater than the third threshold.

[0171] Wherein, S value is the cell selection reception level value and / or cell selection signal reception quality value on the carrier frequency, and the high-priority carrier frequency is a carrier frequency with a priority higher than a preset priority. The first threshold, the second threshold, and the third threshold can be the same or different; as an example, they can all be set to 0.

[0172] b) If the preset multi-carrier cell selection criteria are met, determine which multi-carrier cell to camp on.

[0173] In this embodiment of the invention, considering that there are multiple carrier frequencies in a multi-carrier cell, taking a certain carrier frequency f as an example, the S value is specifically calculated as follows: the cell selection reception level value Srxlev,f and the cell selection signal reception quality value Squal,f on carrier frequency f are calculated according to the following formulas:

[0174] Srxlev,f=Q rxlevmeas,f –(Q rxlevmin,f +Q rxlevminoffset,f )–P compensation -Qoffset temp,f

[0175] Squal,f=Q qualmeas,f –(Q qualmin,f +Q qualminoffset,f -Qoffset temp,f

[0176] Among them: Q rxlevmeas,f Select the receive level value for the cell measured on carrier frequency f;

[0177] Q qualmeas,f Select the cell signal reception quality value measured on carrier frequency f;

[0178] Q rxlevmin,f This is the minimum allowed received signal level value for the multi-carrier cell on carrier frequency f;

[0179] Q qualmin,f This represents the minimum acceptable reception quality value for the multi-carrier cell on carrier frequency f.

[0180] Q rxlevminoffset,f and Q qualminoffset,f The carrier frequency offset value considered when the terminal is normally residing on the access PLMN (VPLMN) to search for a higher priority PLMN;

[0181] P compensation These are terminal-level compensation parameters;

[0182] Qoffset temp,f The offset value used on carrier frequency f when RRC connection establishment fails.

[0183] Specifically, Srxlev,f, Squal,f, Q rxlevmeas,f Q qualmeas,f Q rxlevmin,f Q qualmin,f The unit can be dB.

[0184] For example, the above embodiments designed cell reselection triggering conditions and R criteria based on frequency-level parameters to avoid unnecessary cell reselection processes caused by the UE not meeting the quality threshold requirements of a certain carrier frequency in a multi-carrier cell, so that the UE can camp on a cell that meets the quality requirements as much as possible. Cell reselection will be explained in more detail below.

[0185] If the terminal is already camped on a multi-carrier cell, such as the first multi-carrier cell, step 22 above, determining whether to camp on the corresponding cell, specifically includes:

[0186] a) If the priority of the first carrier frequency is higher than the highest priority of the first multi-carrier cell, and there is a first cell on the carrier frequency of the first carrier frequency priority that satisfies the multi-carrier cell selection criterion or the single-carrier cell selection criterion, then it is determined that the cell will be reselected to the first cell.

[0187] Here, if a first cell with a higher frequency priority exists, and that first cell also meets the multi-carrier cell selection criteria or the single-carrier cell selection criteria, then the cell will be reselected to the first cell. For details on the multi-carrier cell selection criteria, please refer to the above description; they will not be repeated here. The single-carrier cell selection criteria can be found in existing technologies or the traditional cell selection methods described above.

[0188] The first cell can be a single-carrier cell or a multi-carrier cell. When the first cell is a single-carrier cell, if a carrier frequency of the first cell meets the above-mentioned single-carrier cell selection criteria, and the priority of that carrier frequency is higher than the highest carrier frequency priority of the currently camped first multi-carrier cell, then the cell can be reselected to the first cell. When the first cell is a multi-carrier cell, if a certain carrier frequency of the first cell meets the above-mentioned multi-carrier cell selection criteria, and the priority of that carrier frequency is higher than the highest carrier frequency priority of the currently camped first multi-carrier cell, then the cell can be reselected to the first cell.

[0189] (b) When the signal of the first multi-carrier cell is inferior to the first signal quality condition, the following judgment process is performed on each carrier of the first multi-carrier cell in the order of priority of each carrier frequency, until it is determined that the cell will be reselected to the second cell or all carrier frequencies have been judged: determine whether there is a second cell that meets the first preset condition on the carrier frequency with the same priority as the current carrier frequency of the first multi-carrier cell. If there is, determine that the cell will be reselected to the second cell. The first preset condition includes: frequency-level cell reselection criteria, and multi-carrier cell selection criteria or single-carrier cell selection criteria.

[0190] Here, the signal quality of the first multi-carrier cell is inferior to the first signal quality condition, specifically any of the following:

[0191] (1) The signal quality of all carrier frequencies in the first multi-carrier cell is lower than the first threshold value of the corresponding carrier frequency level. That is to say, the first threshold is set for each carrier frequency and can be the same or different.

[0192] (2) The signal quality of at least one carrier frequency of the first multi-carrier cell is lower than the corresponding carrier frequency level first threshold value, wherein the at least one carrier frequency is a pre-specified carrier frequency, or the first X carrier frequencies sorted by priority.

[0193] In this document, the signal quality of the carrier frequency may include: cell selection receive level value on the carrier frequency, and / or cell selection signal receive quality value on the carrier frequency.

[0194] When the signal quality of the first multi-carrier cell is inferior to the first signal quality condition, the carrier frequencies of the first multi-carrier cell are sorted according to their priority, and then each carrier frequency is processed sequentially until it is determined that the cell will be reselected to the second cell or all carrier frequencies have been processed. When processing a carrier frequency of the first multi-carrier cell (referred to as the current carrier frequency for ease of description), it is determined whether there is a second cell that meets the first preset condition on a carrier frequency with the same priority as the current carrier frequency. If there is, the cell will be reselected to the second cell; otherwise, the process continues to process carrier frequencies of the next priority.

[0195] The first preset condition refers to the following: the first multi-carrier cell and the second cell meet the frequency-level cell reselection criteria, and the second cell meets the multi-carrier cell selection criteria or the single-carrier cell selection criteria.

[0196] The first multi-carrier cell and the second cell satisfy a frequency-level cell reselection criterion, specifically: the R value of the first multi-carrier cell on the current carrier frequency (hereinafter referred to as the first carrier frequency for ease of description), and the R value of the second cell on a carrier frequency with the same priority as the current carrier frequency (hereinafter referred to as the second carrier frequency for ease of description), satisfy the cell reselection criterion. The specific content of the frequency-level cell reselection criterion can refer to existing cell reselection criteria, such as the R criterion: if the R value of the second cell on the second carrier frequency is greater than the R value of the first multi-carrier cell on the first carrier frequency, and the duration exceeds a certain preset threshold, then the cell can be reselected to the second cell. Furthermore, the aforementioned R criterion may also require that the terminal camps on the first multi-carrier cell for a duration exceeding a preset duration.

[0197] Here, the R value R of the first multi-carrier cell on the first carrier frequency f1 is R s,f1 The R value R of the second cell on the second carrier frequency f2, which has the same priority as the first carrier frequency f1. n,f2 They can be calculated using the following formulas:

[0198] R s,f1 =Q meas,s,f1 +Q Hyst,f1 -Qoffset temp,f1

[0199] R n,f2 =Q meas,n,f2 –Q offset,f2 -Qoffset temp,f2

[0200] Among them, Q meas,s,f1 The RSRP value of the first multi-carrier cell measured by the terminal on the first carrier frequency f1;

[0201] Q meas,n,f2 The RSRP value of the second cell on the second carrier frequency f2 as measured by the terminal;

[0202] Q Hyst,f1 The cell reselection hysteresis value on the first carrier frequency f1;

[0203] Qoffset temp,f1 The offset value temporarily added on the first carrier frequency f1;

[0204] Qoffset temp,f2 The offset value temporarily added on the second carrier frequency f2;

[0205] Q offset,f2 When the first carrier frequency f1 and the second carrier frequency f2 are the same, if Qoffset s,n,f2 If valid, it equals Qoffset. s,n,f2Otherwise, it is 0; when f1 and f2 are different frequencies, if Qoffset s,n,f2 If valid, it equals Qoffset. s,n,f2 +Qoffset frequency,f1 Otherwise, it equals Qoffset. frequency Among them, Qoffset s,n,f2 When both the first multi-carrier cell and the second cell are on carrier frequency f2, the cell-level offset applied for carrier frequency f2; Qoffset frequency,f1 It is a frequency level offset applied to f1 when f2 and f1 have the same priority.

[0206] The second cell meets either the multi-carrier cell selection criterion or the single-carrier cell selection criterion. Specifically: when the second cell is a multi-carrier cell, it meets the multi-carrier cell selection criterion; when the second cell is a single-carrier cell, it meets the single-carrier cell selection criterion. For details on the multi-carrier cell selection criterion or the single-carrier cell selection criterion, please refer to the above content, which will not be repeated here.

[0207] c) If the signal quality of the first multi-carrier cell is inferior to that of the second signal quality condition, and if the priority of the second carrier frequency is lower than the lowest priority of the first multi-carrier cell, and there is a third cell on the carrier frequency of the second carrier frequency priority that satisfies the multi-carrier cell selection criterion or the single-carrier cell selection criterion, then it is determined to reselect to the third cell.

[0208] Here, the signal quality of the first multi-carrier cell is inferior to the second signal quality condition, specifically: the signal quality of all carrier frequencies in the first multi-carrier cell is lower than the corresponding carrier level second threshold value. Typically, the second signal quality condition is worse than the first signal quality condition; that is, if received signal level or received signal quality is used as a measure of signal quality, the second threshold value is usually lower than the first threshold value.

[0209] In this embodiment of the invention, the network can also broadcast cell access-related parameters in the system information to indicate information such as carrier frequencies that allow or prohibit terminal access. Specifically, the terminal can receive cell access-related system information, wherein the cell access-related system information includes at least one of the following:

[0210] 1) First indication information used to indicate whether a terminal is allowed to access the cell via the target carrier frequency;

[0211] 2) Second indication information used to indicate whether the terminal is allowed to perform same-frequency reselection on the target carrier frequency;

[0212] 3) Third indication information used to indicate the list of PLMNs supported by the target carrier frequency;

[0213] 4) Fourth indication information used to indicate the tracking area identifier (TAC) corresponding to the target carrier frequency.

[0214] The target carrier frequencies mentioned above are one or more carrier frequencies.

[0215] In this way, the terminal can determine whether it can perform same-frequency reselection and / or whether it should camp on the corresponding cell based on the system information related to cell access.

[0216] For example, in traditional schemes, parameters such as the PLMN Identity List (plmn-IdentityList), Tracking Area Code (trackingAreaCode), Cell Barred Indication (cellBarred), and IntraFreqReselection (intraFreqReselection) are uniquely configured for each cell. However, with the introduction of multi-carrier serving cells, this embodiment of the invention configures parameters separately for each carrier frequency. For example,

[0217] - A frequency-specific "cellBarred" indication is used by the UE to determine whether it can access the cell via that carrier frequency;

[0218] -Based on the frequency-specific "intraFreqReselection" indication, it is used by the UE to determine whether to allow intra-frequency reselection on this carrier frequency;

[0219] - Based on the frequency-specific “plmn-IdentityList” indication, it is used by the UE to determine the list of PLMNs supported by this carrier frequency;

[0220] - Based on the frequency-specific “trackingAreaCode” indication, it is used by the UE to determine the TAC corresponding to the carrier frequency.

[0221] Please refer to Figure 3 This invention also provides an information transmission method applied to network-side equipment (such as a base station), the method comprising:

[0222] Step 31: The network-side device sends system information related to cell selection and / or cell reselection for multi-carrier cells to the terminal; wherein,

[0223] The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria.

[0224] The system information related to cell reselection includes at least one of the following: carrier level threshold, carrier level second threshold, carrier priority within the cell, carrier with the same priority as the cell carrier, third value X, and parameters of the carrier level related to cell reselection; wherein, X is an integer greater than or equal to 1; X represents that among the multi-carrier cells currently camped by the terminal, if the top X carriers sorted by carrier priority are inferior to the first signal quality condition, cell reselection is triggered;

[0225] The multi-carrier cell is a cell with multiple downlink carrier frequencies.

[0226] Through the above steps, the network-side equipment sends the aforementioned system information to the terminal, which can support the terminal in cell selection and / or reselection under multi-carrier serving cells, so that the terminal can camp on a suitable cell.

[0227] Specifically, the carrier frequency threshold values ​​include:

[0228] Used to determine whether the signal of the multi-carrier cell currently camped by the terminal is inferior to a first threshold value of the carrier level under the first signal quality condition; and / or,

[0229] The carrier level second threshold value is used to determine whether the signal of the multi-carrier cell where the terminal is currently camped is inferior to the second signal quality condition.

[0230] The parameters for selecting the relevant carrier frequency class in the cell include at least one of the following parameters: the minimum allowable received level value on the target carrier frequency, the minimum allowable received quality value on the target carrier frequency, the carrier frequency class offset value when it involves the selection of the Public Land Mobile Network (PLMN), and the offset value used on the target carrier frequency when the Radio Resource Control (RRC) connection establishment fails.

[0231] The parameters of the cell reselection related carrier frequency level include at least one of the following parameters: carrier frequency level cell reselection hysteresis value, carrier frequency level temporary offset, cell-level offset for the target carrier frequency, and frequency-level offset for the target carrier frequency.

[0232] The target carrier frequency is one or more carrier frequencies of the multi-carrier cell.

[0233] In addition, the network-side device can also send cell access-related system information to the terminal, wherein the cell access-related system information includes at least one of the following:

[0234] First indication information used to indicate whether a terminal is allowed to access the cell via the target carrier frequency;

[0235] Second indication information used to indicate whether the terminal is allowed to perform same-frequency reselection on the target carrier frequency;

[0236] Third indication information used to indicate the list of PLMNs supported by the target carrier frequency;

[0237] The fourth indication information is used to indicate the tracking area identifier (TAC) corresponding to the target carrier frequency.

[0238] The various methods of the embodiments of the present invention have been described above. Apparatus for implementing the above methods will now be provided.

[0239] Please refer to Figure 4 This invention also provides a terminal 400, comprising:

[0240] The first receiving module 401 is used to receive system information related to cell selection and / or cell reselection of multi-carrier cells.

[0241] The first determining module is used to determine whether to camp on the corresponding cell;

[0242] The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; and M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria.

[0243] The system information related to cell reselection includes at least one of the following: carrier level threshold, carrier level second threshold, carrier priority within the cell, carrier with the same priority as the cell carrier, third value X, and parameters of the carrier level related to cell reselection; wherein, X is an integer greater than or equal to 1; X represents that when the terminal is camped in a multi-carrier cell, if the first X carriers sorted by carrier priority are inferior to the first signal quality condition, cell reselection is triggered;

[0244] The multi-carrier cell is a cell with multiple downlink carrier frequencies.

[0245] Optionally, the carrier frequency threshold includes:

[0246] Used to determine whether the signal of the multi-carrier cell currently camped by the terminal is inferior to a first threshold value of the carrier level under the first signal quality condition; and / or,

[0247] The carrier level second threshold value is used to determine whether the signal of the multi-carrier cell where the terminal is currently camped is inferior to the second signal quality condition.

[0248] Optionally, the parameters for selecting the relevant carrier frequency class in the cell selection include at least one of the following parameters: the minimum allowed received level value on the target carrier frequency, the minimum allowed received quality value on the target carrier frequency, the carrier frequency class offset value when selecting the Public Land Mobile Network (PLMN), and the offset value used on the target carrier frequency when the Radio Resource Control (RRC) connection establishment fails.

[0249] The parameters of the cell reselection related carrier frequency level include at least one of the following parameters: carrier frequency level cell reselection hysteresis value, carrier frequency level temporary offset, cell-level offset for the target carrier frequency, and frequency-level offset for the target carrier frequency.

[0250] The target carrier frequency is one or more carrier frequencies of the multi-carrier cell.

[0251] Optionally, the first determining module includes:

[0252] The cell selection module is used to determine whether the multi-carrier cell meets the preset multi-carrier cell selection criteria based on the system information related to cell selection of the multi-carrier cell when the terminal is not currently camped on any cell.

[0253] If the preset multi-carrier cell selection criteria are met, it is determined to camp on the multi-carrier cell;

[0254] The multi-carrier cell selection criteria include at least one of the following:

[0255] The S-value on one carrier frequency of the multi-carrier cell is greater than the first threshold.

[0256] The S-values ​​on the N carrier frequencies of the multi-carrier cell are greater than the second threshold.

[0257] The S-values ​​on the M high-priority carriers of the multi-carrier cell are greater than the third threshold.

[0258] Wherein, the S value is the cell selection reception level value and / or cell selection signal reception quality value on the carrier frequency, and the high priority carrier frequency is a carrier frequency with a priority higher than a preset priority.

[0259] Optionally, the cell selection receive level value Srxlev,f and the cell selection signal receive quality value Squal,f on carrier frequency f are calculated according to the following formulas:

[0260] Srxlev,f=Q rxlevmeas,f –(Q rxlevmin,f +Q rxlevminoffset,f )–P compensation -Qoffset temp,f

[0261] Squal,f=Q qualmeas,f –(Q qualmin,f +Q qualminoffset,f -Qoffset temp,f

[0262] Among them: Q rxlevmeas,f Select the receive level value for the cell measured on carrier frequency f;

[0263] Q qualmeas,f Select the cell signal reception quality value measured on carrier frequency f;

[0264] Q rxlevmin,f This is the minimum allowed received signal level value for the multi-carrier cell on carrier frequency f;

[0265] Q qualmin,f This represents the minimum acceptable reception quality value for the multi-carrier cell on carrier frequency f.

[0266] Q rxlevminoffset,f and Q qualminoffset,f The carrier frequency offset value considered when the terminal is normally residing on the VPLMN and searching for a higher priority PLMN;

[0267] P compensation These are terminal-level compensation parameters;

[0268] Qoffset temp,f The offset value used on carrier frequency f when RRC connection establishment fails.

[0269] Optionally, the first determining module includes:

[0270] The cell reselection module is used to determine whether to camp on the corresponding cell in at least one of the following ways when the terminal is currently camped on a first multi-carrier cell:

[0271] If the priority of the first carrier frequency is higher than the highest priority of the first multi-carrier cell, and there is a first cell on the carrier frequency with the first priority that satisfies the multi-carrier cell selection criterion or the single-carrier cell selection criterion, then it is determined to reselect to the first cell.

[0272] When the signal of the first multi-carrier cell is inferior to the first signal quality condition, the following judgment process is performed on each carrier of the first multi-carrier cell in the order of priority of each carrier frequency, until it is determined that the cell will be reselected to the second cell or all carrier frequencies have been judged: it is determined whether there is a second cell that meets the first preset condition on the carrier frequency with the same priority as the current carrier frequency of the first multi-carrier cell. If there is, it is determined that the cell will be reselected to the second cell. The first preset condition includes: frequency-level cell reselection criteria, and multi-carrier cell selection criteria or single-carrier cell selection criteria.

[0273] If the signal quality of the first multi-carrier cell is inferior to that of the second multi-carrier cell, and if the priority of the second carrier frequency is lower than the lowest priority of the first multi-carrier cell, and there is a third cell on the carrier frequency of the second carrier frequency priority that satisfies the multi-carrier cell selection criterion or the single-carrier cell selection criterion, then it is determined to reselect to the third cell.

[0274] Optionally, the frequency-level cell reselection criterion is: the R value of the first multi-carrier cell on the current carrier frequency, and the R value of the second cell on a carrier frequency with the same priority as the current carrier frequency, satisfy the cell reselection criterion;

[0275] The single-carrier frequency cell selection criterion is that the S-value on the cell carrier frequency is greater than the fourth threshold.

[0276] The multi-carrier cell selection criteria include at least one of the following:

[0277] The S-value on one carrier frequency of the multi-carrier cell is greater than the first threshold.

[0278] The S-values ​​on the N carrier frequencies of the multi-carrier cell are greater than the second threshold.

[0279] The S-values ​​on the M high-priority carriers of the multi-carrier cell are greater than the third threshold.

[0280] Wherein, S is the cell selection receive level value and / or cell selection signal receive quality value, and the high priority carrier frequency is a carrier frequency with a priority higher than a preset priority.

[0281] Optionally, the R value R of the first multi-carrier cell on the first carrier frequency f1 s,f1 The R value R of the second cell on the second carrier frequency f2, which has the same priority as the first carrier frequency f1. n,f2 Calculate according to the following formulas respectively:

[0282] R s,f 1 = Q meas,s,f1 +Q Hyst,f1 -Qoffset temp,f1

[0283] R n,f2 =Q meas,n,f2 –Q offset,f2 -Qoffset temp,f2

[0284] Among them, Q meas,s,f1 The RSRP value of the first multi-carrier cell measured by the terminal on the first carrier frequency f1;

[0285] Q meas,n,f2 The RSRP value of the second cell on the second carrier frequency f2 as measured by the terminal;

[0286] Q Hyst,f1 The cell reselection hysteresis value on the first carrier frequency f1;

[0287] Qoffset temp,f1 The offset value temporarily added on the first carrier frequency f1;

[0288] Qoffset temp,f2 The offset value temporarily added on the second carrier frequency f2;

[0289] Q offset,f2 When the first carrier frequency f1 and the second carrier frequency f2 are the same, if Qoffset s,n,f2 If valid, it equals Qoffset. s,n,f2 Otherwise, it is 0; when f1 and f2 are different frequencies, if Qoffset s,n,f2 If valid, it equals Qoffset. s,n,f2 +Qoffset frequency,f1 Otherwise, it equals Qoffset. frequency Among them, Qoffset s,n,f2 When both the first multi-carrier cell and the second cell are on carrier frequency f2, the cell-level offset applied for carrier frequency f2; Qoffset frequency,f1 It is a frequency level offset applied to f1 when f2 and f1 have the same priority.

[0290] Optionally, the signal quality of the first multi-carrier cell is inferior to the first signal quality condition, specifically:

[0291] The signal quality of all carrier frequencies in the first multi-carrier cell is lower than the first threshold value of the corresponding carrier frequency level;

[0292] Alternatively, the signal quality of at least one carrier frequency in the first multi-carrier cell is lower than the corresponding carrier frequency level first threshold value, wherein the at least one carrier frequency is a pre-specified carrier frequency, or the top X carrier frequencies sorted by priority.

[0293] The signal quality of the first multi-carrier cell is inferior to that of the second signal quality condition, specifically:

[0294] The signal quality of all carrier frequencies in the first multi-carrier cell is lower than the second threshold value of the corresponding carrier frequency level.

[0295] Optionally, the signal quality of the carrier frequency includes:

[0296] Select a receive level value for the cell on the carrier frequency, and / or select a signal reception quality value for the cell on the carrier frequency.

[0297] Optionally, the terminal further includes:

[0298] The second receiving module is used to receive system information related to cell access, wherein the system information related to cell access includes at least one of the following:

[0299] First indication information used to indicate whether a terminal is allowed to access the cell via the target carrier frequency;

[0300] Second indication information used to indicate whether the terminal is allowed to perform same-frequency reselection on the target carrier frequency;

[0301] Third indication information used to indicate the list of PLMNs supported by the target carrier frequency;

[0302] The fourth indication information is used to indicate the tracking area identifier (TAC) corresponding to the target carrier frequency.

[0303] Optionally, the terminal further includes:

[0304] The determination module is used to determine whether to perform same-frequency reselection and / or whether to camp on the corresponding cell based on the system information related to cell access before determining whether to camp on the corresponding cell.

[0305] It should be noted that the device in this embodiment is the same as the one described above. Figure 2 The devices corresponding to the methods shown are all applicable to the embodiments of the above-described devices, and can achieve the same technical effects. The devices provided by the embodiments of the present invention can implement all the method steps implemented in the above-described method embodiments and can achieve the same technical effects. Therefore, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail here.

[0306] Please refer to Figure 5 The present invention also provides a terminal 500, including: a transceiver 501 and a processor 502;

[0307] The transceiver 501 is used to receive system information related to cell selection and / or cell reselection of multi-carrier cells.

[0308] The processor 502 is used to determine whether to camp on the corresponding cell;

[0309] The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; and M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria.

[0310] The system information related to cell reselection includes at least one of the following: carrier level threshold, carrier level second threshold, carrier priority within the cell, carrier with the same priority as the cell carrier, third value X, and parameters of the carrier level related to cell reselection; wherein, X is an integer greater than or equal to 1; X represents that when the terminal is camped in a multi-carrier cell, if the first X carriers sorted by carrier priority are inferior to the first signal quality condition, cell reselection is triggered;

[0311] The multi-carrier cell is a cell with multiple downlink carrier frequencies.

[0312] Optionally, the carrier frequency threshold includes:

[0313] Used to determine whether the signal of the multi-carrier cell currently camped by the terminal is inferior to a first threshold value of the carrier level under the first signal quality condition; and / or,

[0314] The carrier level second threshold value is used to determine whether the signal of the multi-carrier cell where the terminal is currently camped is inferior to the second signal quality condition.

[0315] Optionally, the parameters for selecting the relevant carrier frequency class in the cell selection include at least one of the following parameters: the minimum allowed received level value on the target carrier frequency, the minimum allowed received quality value on the target carrier frequency, the carrier frequency class offset value when selecting the Public Land Mobile Network (PLMN), and the offset value used on the target carrier frequency when the Radio Resource Control (RRC) connection establishment fails.

[0316] The parameters of the cell reselection related carrier frequency level include at least one of the following parameters: carrier frequency level cell reselection hysteresis value, carrier frequency level temporary offset, cell-level offset for the target carrier frequency, and frequency-level offset for the target carrier frequency.

[0317] The target carrier frequency is one or more carrier frequencies of the multi-carrier cell.

[0318] Optionally, the processor is further configured to, when the terminal is not currently camped on any cell, determine whether the multi-carrier cell meets the preset multi-carrier cell selection criteria based on the cell selection-related system information of the multi-carrier cell;

[0319] If the preset multi-carrier cell selection criteria are met, it is determined to camp on the multi-carrier cell;

[0320] The multi-carrier cell selection criteria include at least one of the following:

[0321] The S-value on one carrier frequency of the multi-carrier cell is greater than the first threshold.

[0322] The S-values ​​on the N carrier frequencies of the multi-carrier cell are greater than the second threshold.

[0323] The S-values ​​on the M high-priority carriers of the multi-carrier cell are greater than the third threshold.

[0324] Wherein, the S value is the cell selection reception level value and / or cell selection signal reception quality value on the carrier frequency, and the high priority carrier frequency is a carrier frequency with a priority higher than a preset priority.

[0325] Optionally, the cell selection receive level value Srxlev,f and the cell selection signal receive quality value Squal,f on carrier frequency f are calculated according to the following formulas:

[0326] Srxlev,f=Q rxlevmeas,f –(Q rxlevmin,f +Q rxlevminoffset,f )–P compensation -Qoffset temp,f

[0327] Squal,f=Q qualmeas,f –(Q qualmin,f +Q qualminoffset,f -Qoffset temp,f

[0328] Among them: Q rxlevmeas,f Select the receive level value for the cell measured on carrier frequency f;

[0329] Q qualmeas,f Select the cell signal reception quality value measured on carrier frequency f;

[0330] Q rxlevmin,f This is the minimum allowed received signal level value for the multi-carrier cell on carrier frequency f;

[0331] Q qualmin,f This represents the minimum acceptable reception quality value for the multi-carrier cell on carrier frequency f.

[0332] Q rxlevminoffset,f and Q qualminoffset,f The carrier frequency offset value considered when the terminal is normally residing on the VPLMN and searching for a higher priority PLMN;

[0333] P compensation These are terminal-level compensation parameters;

[0334] Qoffset temp,f The offset value used on carrier frequency f when RRC connection establishment fails.

[0335] Optionally, the processor is further configured to, when the terminal is currently camped in a first multi-carrier cell, determine whether to camp on the corresponding cell in at least one of the following ways:

[0336] If the priority of the first carrier frequency is higher than the highest priority of the first multi-carrier cell, and there is a first cell on the carrier frequency with the first priority that satisfies the multi-carrier cell selection criterion or the single-carrier cell selection criterion, then it is determined to reselect to the first cell.

[0337] When the signal of the first multi-carrier cell is inferior to the first signal quality condition, the following judgment process is performed on each carrier of the first multi-carrier cell in the order of priority of each carrier frequency, until it is determined that the cell will be reselected to the second cell or all carrier frequencies have been judged: it is determined whether there is a second cell that meets the first preset condition on the carrier frequency with the same priority as the current carrier frequency of the first multi-carrier cell. If there is, it is determined that the cell will be reselected to the second cell. The first preset condition includes: frequency-level cell reselection criteria, and multi-carrier cell selection criteria or single-carrier cell selection criteria.

[0338] If the signal quality of the first multi-carrier cell is inferior to that of the second multi-carrier cell, and if the priority of the second carrier frequency is lower than the lowest priority of the first multi-carrier cell, and there is a third cell on the carrier frequency of the second carrier frequency priority that satisfies the multi-carrier cell selection criterion or the single-carrier cell selection criterion, then it is determined to reselect to the third cell.

[0339] Optionally, the frequency-level cell reselection criterion is: the R value of the first multi-carrier cell on the current carrier frequency, and the R value of the second cell on a carrier frequency with the same priority as the current carrier frequency, satisfy the cell reselection criterion;

[0340] The single-carrier frequency cell selection criterion is that the S-value on the cell carrier frequency is greater than the fourth threshold.

[0341] The multi-carrier cell selection criteria include at least one of the following:

[0342] The S-value on one carrier frequency of the multi-carrier cell is greater than the first threshold.

[0343] The S-values ​​on the N carrier frequencies of the multi-carrier cell are greater than the second threshold.

[0344] The S-values ​​on the M high-priority carriers of the multi-carrier cell are greater than the third threshold.

[0345] Wherein, S is the cell selection receive level value and / or cell selection signal receive quality value, and the high priority carrier frequency is a carrier frequency with a priority higher than a preset priority.

[0346] Optionally, the R value R of the first multi-carrier cell on the first carrier frequency f1 s,f1 The R value R of the second cell on the second carrier frequency f2, which has the same priority as the first carrier frequency f1. n,f2 Calculate according to the following formulas respectively:

[0347] R s,f1 =Q meas,s,f1 +Q Hyst,f1 -Qoffset temp,f1

[0348] R n,f2 =Q meas,n,f2 –Q offset,f2 -Qoffset temp,f2

[0349] Among them, Q meas,s,f1 The RSRP value of the first multi-carrier cell measured by the terminal on the first carrier frequency f1;

[0350] Q meas,n,f2 The RSRP value of the second cell on the second carrier frequency f2 as measured by the terminal;

[0351] Q Hyst,f1 The cell reselection hysteresis value on the first carrier frequency f1;

[0352] Qoffset temp,f1 The offset value temporarily added on the first carrier frequency f1;

[0353] Qoffset temp,f2 The offset value temporarily added on the second carrier frequency f2;

[0354] Q offset,f2 When the first carrier frequency f1 and the second carrier frequency f2 are the same, if Qoffset s,n,f2 If valid, it equals Qoffset. s,n,f2 Otherwise, it is 0; when f1 and f2 are different frequencies, if Qoffset s,n,f2If valid, it equals Qoffset. s,n,f2 +Qoffset frequency,f1 Otherwise, it equals Qoffset. frequency Among them, Qoffset s,n,f2 When both the first multi-carrier cell and the second cell are on carrier frequency f2, the cell-level offset applied for carrier frequency f2; Qoffset frequency,f1 It is a frequency level offset applied to f1 when f2 and f1 have the same priority.

[0355] Optionally, the signal quality of the first multi-carrier cell is inferior to the first signal quality condition, specifically:

[0356] The signal quality of all carrier frequencies in the first multi-carrier cell is lower than the first threshold value of the corresponding carrier frequency level;

[0357] Alternatively, the signal quality of at least one carrier frequency in the first multi-carrier cell is lower than the corresponding carrier frequency level first threshold value, wherein the at least one carrier frequency is a pre-specified carrier frequency, or the top X carrier frequencies sorted by priority.

[0358] The signal quality of the first multi-carrier cell is inferior to that of the second signal quality condition, specifically:

[0359] The signal quality of all carrier frequencies in the first multi-carrier cell is lower than the second threshold value of the corresponding carrier frequency level.

[0360] Optionally, the signal quality of the carrier frequency includes:

[0361] Select a receive level value for the cell on the carrier frequency, and / or select a signal reception quality value for the cell on the carrier frequency.

[0362] Optionally, the transceiver is further configured to receive system information related to cell access, wherein the system information related to cell access includes at least one of the following:

[0363] First indication information used to indicate whether a terminal is allowed to access the cell via the target carrier frequency;

[0364] Second indication information used to indicate whether the terminal is allowed to perform same-frequency reselection on the target carrier frequency;

[0365] Third indication information used to indicate the list of PLMNs supported by the target carrier frequency;

[0366] The fourth indication information is used to indicate the tracking area identifier (TAC) corresponding to the target carrier frequency.

[0367] Optionally, the processor is further configured to, before determining whether to camp on the corresponding cell, determine whether to perform same-frequency reselection and / or whether to camp on the corresponding cell based on the system information related to cell access.

[0368] It should be noted that the device in this embodiment is the same as the one described above. Figure 2 The devices corresponding to the methods shown are all applicable to the embodiments of the above-described devices, and can achieve the same technical effects. The devices provided by the embodiments of the present invention can implement all the method steps implemented in the above-described method embodiments and can achieve the same technical effects. Therefore, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail here.

[0369] Please refer to Figure 6 This invention also provides a network-side device 600, comprising:

[0370] The first transmitting module 601 transmits system information related to cell selection and / or cell reselection for multi-carrier cells to the terminal; wherein...

[0371] The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria.

[0372] The system information related to cell reselection includes at least one of the following: carrier level threshold, carrier level second threshold, carrier priority within the cell, carrier with the same priority as the cell carrier, third value X, and parameters of the carrier level related to cell reselection; wherein, X is an integer greater than or equal to 1; X represents that among the multi-carrier cells currently camped by the terminal, if the top X carriers sorted by carrier priority are inferior to the first signal quality condition, cell reselection is triggered;

[0373] The multi-carrier cell is a cell with multiple downlink carrier frequencies.

[0374] Optionally, the carrier frequency threshold includes:

[0375] Used to determine whether the signal of the multi-carrier cell currently camped by the terminal is inferior to a first threshold value of the carrier level under the first signal quality condition; and / or,

[0376] The carrier level second threshold value is used to determine whether the signal of the multi-carrier cell where the terminal is currently camped is inferior to the second signal quality condition.

[0377] Optionally, the parameters for selecting the relevant carrier frequency class in the cell selection include at least one of the following parameters: the minimum allowed received level value on the target carrier frequency, the minimum allowed received quality value on the target carrier frequency, the carrier frequency class offset value when it involves the selection of the Public Land Mobile Network (PLMN), and the offset value used on the target carrier frequency when the Radio Resource Control (RRC) connection establishment fails.

[0378] The parameters of the cell reselection related carrier frequency level include at least one of the following parameters: carrier frequency level cell reselection hysteresis value, carrier frequency level temporary offset, cell-level offset for the target carrier frequency, and frequency-level offset for the target carrier frequency.

[0379] The target carrier frequency is one or more carrier frequencies of the multi-carrier cell.

[0380] Optionally, the network-side device further includes:

[0381] The second sending module is used to send cell access-related system information to the terminal, wherein the cell access-related system information includes at least one of the following:

[0382] First indication information used to indicate whether a terminal is allowed to access the cell via the target carrier frequency;

[0383] Second indication information used to indicate whether the terminal is allowed to perform same-frequency reselection on the target carrier frequency;

[0384] Third indication information used to indicate the list of PLMNs supported by the target carrier frequency;

[0385] The fourth indication information is used to indicate the tracking area identifier (TAC) corresponding to the target carrier frequency.

[0386] It should be noted that the device in this embodiment is the same as the one described above. Figure 3 The devices corresponding to the methods shown are all applicable to the embodiments of the above-described devices, and can achieve the same technical effects. The devices provided by the embodiments of the present invention can implement all the method steps implemented in the above-described method embodiments and can achieve the same technical effects. Therefore, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail here.

[0387] Please refer to Figure 7 The present invention also provides a network-side device 700, including: a transceiver 701 and a processor 702;

[0388] The transceiver 701 is used to send system information related to cell selection and / or cell reselection for multi-carrier cells to the terminal; wherein...

[0389] The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria.

[0390] The system information related to cell reselection includes at least one of the following: carrier level threshold, carrier level second threshold, carrier priority within the cell, carrier with the same priority as the cell carrier, third value X, and parameters of the carrier level related to cell reselection; wherein, X is an integer greater than or equal to 1; X represents that among the multi-carrier cells currently camped by the terminal, if the top X carriers sorted by carrier priority are inferior to the first signal quality condition, cell reselection is triggered;

[0391] The multi-carrier cell is a cell with multiple downlink carrier frequencies.

[0392] Optionally, the carrier frequency threshold includes:

[0393] Used to determine whether the signal of the multi-carrier cell currently camped by the terminal is inferior to a first threshold value of the carrier level under the first signal quality condition; and / or,

[0394] The carrier level second threshold value is used to determine whether the signal of the multi-carrier cell where the terminal is currently camped is inferior to the second signal quality condition.

[0395] Optionally, the parameters for selecting the relevant carrier frequency class in the cell selection include at least one of the following parameters: the minimum allowed received level value on the target carrier frequency, the minimum allowed received quality value on the target carrier frequency, the carrier frequency class offset value when it involves the selection of the Public Land Mobile Network (PLMN), and the offset value used on the target carrier frequency when the Radio Resource Control (RRC) connection establishment fails.

[0396] The parameters of the cell reselection related carrier frequency level include at least one of the following parameters: carrier frequency level cell reselection hysteresis value, carrier frequency level temporary offset, cell-level offset for the target carrier frequency, and frequency-level offset for the target carrier frequency.

[0397] The target carrier frequency is one or more carrier frequencies of the multi-carrier cell.

[0398] Optionally, the transceiver 701 is further configured to send cell access-related system information to the terminal, wherein the cell access-related system information includes at least one of the following:

[0399] First indication information used to indicate whether a terminal is allowed to access the cell via the target carrier frequency;

[0400] Second indication information used to indicate whether the terminal is allowed to perform same-frequency reselection on the target carrier frequency;

[0401] Third indication information used to indicate the list of PLMNs supported by the target carrier frequency;

[0402] The fourth indication information is used to indicate the tracking area identifier (TAC) corresponding to the target carrier frequency.

[0403] It should be noted that the device in this embodiment is the same as the one described above. Figure 3 The devices corresponding to the methods shown are all applicable to the embodiments of the above-described devices, and can achieve the same technical effects. The devices provided by the embodiments of the present invention can implement all the method steps implemented in the above-described method embodiments and can achieve the same technical effects. Therefore, the parts that are the same as those in the method embodiments and the beneficial effects will not be described in detail here.

[0404] Please refer to Figure 8 The present invention also provides a terminal 800, including a processor 801, a memory 802, and a computer program stored in the memory 802 and executable on the processor 801. When the computer program is executed by the processor 801, it implements the various processes of the above-described cell camping method embodiments executed by the terminal and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0405] Please refer to Figure 9 This invention also provides a network device 900, including a processor 901, a memory 902, and a computer program stored in the memory 902 and executable on the processor 901. When the computer program is executed by the processor 901, it implements the various processes of the above-described information transmission method embodiments executed by the network device and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0406] This invention also provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the various processes of the above-described cell-stationing method or information transmission method embodiments, achieving the same technical effects. To avoid repetition, further details are omitted here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0407] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0408] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0409] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A method for maintaining a presence in a residential community, characterized in that, include: The terminal receives system information related to cell selection and / or cell reselection for multi-carrier cells; The terminal determines whether to camp on the corresponding cell; The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; and M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria. The system information related to cell reselection includes at least one of the following: carrier frequency level threshold, carrier frequency priority within the cell, carrier frequency with the same priority as the cell carrier frequency, a third value X, and parameters of the carrier frequency level related to cell reselection; wherein, X is an integer greater than or equal to 1; X represents that when the terminal is camped in a multi-carrier frequency cell, cell reselection is triggered if the first X carrier frequencies, sorted by carrier frequency priority from highest to lowest, are inferior to the first signal quality condition. The multi-carrier cell is a cell with multiple downlink carrier frequencies; the first type of carrier frequency refers to the carrier frequency in the multi-carrier cell whose S value is greater than a second threshold, the second type of carrier frequency refers to the high-priority carrier frequency in the multi-carrier cell whose S value is greater than a third threshold, the S value is the cell selected reception level value and / or the cell selected signal reception quality value on the carrier frequency, the high-priority carrier frequency is the carrier frequency with a priority higher than a preset priority, and the carrier frequency priority within the cell refers to the priority of each carrier frequency; When the terminal is not currently camped on any cell, determining whether to camp on the corresponding cell includes: Based on the system information related to cell selection of the multi-carrier cell, determine whether the multi-carrier cell meets the preset multi-carrier cell selection criteria; If the preset multi-carrier cell selection criteria are met, it is determined to camp on the multi-carrier cell; The multi-carrier cell selection criteria include at least one of the following: The S-value on one carrier frequency of the multi-carrier cell is greater than the first threshold. The S-values ​​on the N carrier frequencies of the multi-carrier cell are greater than the second threshold. The S-values ​​on the M high-priority carriers of the multi-carrier cell are greater than the third threshold. Wherein, the S value is the cell selection reception level value and / or cell selection signal reception quality value on the carrier frequency, and the high priority carrier frequency is a carrier frequency with a priority higher than a preset priority.

2. The method as described in claim 1, characterized in that, The parameters for selecting the relevant carrier frequency class in the cell include at least one of the following parameters: the minimum allowable received level value on the target carrier frequency, the minimum allowable received quality value on the target carrier frequency, the carrier frequency class offset value when selecting the Public Land Mobile Network (PLMN), and the offset value used on the target carrier frequency when the Radio Resource Control (RRC) connection establishment fails. The parameters of the cell reselection related carrier frequency level include at least one of the following parameters: carrier frequency level cell reselection hysteresis value, carrier frequency level temporary offset, cell-level offset for the target carrier frequency, and frequency-level offset for the target carrier frequency. The target carrier frequency is one or more carrier frequencies of the multi-carrier cell.

3. The method as described in claim 1, characterized in that, The cell selection receive level value Srxlev,f and the cell selection signal receive quality value Squal,f on carrier frequency f are calculated according to the following formulas: Srxlev,f = Q rxlevmeas,f – (Q rxlevmin,f + Q rxlevminoffset,f ) – P compensation - Qoffset temp,f Squal,f = Q qualmeas,f – (Q qualmin,f + Q qualminoffset,f ) - Qoffset temp,f Among them: Q rxlevmeas,f Select the receive level value for the cell measured on carrier frequency f; Q qualmeas,f Select the cell signal reception quality value measured on carrier frequency f; Q rxlevmin,f This is the minimum allowed received signal level value for the multi-carrier cell on carrier frequency f; Q qualmin,f This represents the minimum acceptable reception quality value for the multi-carrier cell on carrier frequency f. Q rxlevminoffset,f and Q qualminoffset,f The carrier frequency offset value considered when the terminal is normally residing on the VPLMN and searching for a higher priority PLMN; P compensation These are terminal-level compensation parameters; Qoffset temp,f The offset value used on carrier frequency f when RRC connection establishment fails.

4. The method as described in claim 1, characterized in that, When the terminal is currently camped in the first multi-carrier cell, determining whether to camp in the corresponding cell includes at least one of the following: If the priority of the first carrier frequency is higher than the highest priority of the first multi-carrier cell, and there is a first cell on the carrier frequency with the first priority that satisfies the multi-carrier cell selection criterion or the single-carrier cell selection criterion, then it is determined to reselect to the first cell. When the signal of the first multi-carrier cell is inferior to the first signal quality condition, the following judgment process is performed on each carrier of the first multi-carrier cell in the order of priority of each carrier frequency, until it is determined that the cell will be reselected to the second cell or all carrier frequencies have been judged: it is determined whether there is a second cell that meets the first preset condition on the carrier frequency with the same priority as the current carrier frequency of the first multi-carrier cell. If there is, it is determined that the cell will be reselected to the second cell. The first preset condition includes: frequency-level cell reselection criteria, and multi-carrier cell selection criteria or single-carrier cell selection criteria. If the signal quality of the first multi-carrier cell is inferior to that of the second multi-carrier cell, and if the priority of the second carrier frequency is lower than the lowest priority of the first multi-carrier cell, and there is a third cell on the carrier frequency of the second carrier frequency priority that satisfies the multi-carrier cell selection criterion or the single-carrier cell selection criterion, then it is determined to reselect to the third cell.

5. The method as described in claim 4, characterized in that, The frequency-level cell reselection criterion is: the R value of the first multi-carrier cell on the current carrier frequency, and the R value of the second cell on the carrier frequency with the same priority as the current carrier frequency, satisfy the cell reselection criterion; The single-carrier frequency cell selection criterion is that the S-value on the cell carrier frequency is greater than the fourth threshold. The multi-carrier cell selection criteria include at least one of the following: The S-value on one carrier frequency of the multi-carrier cell is greater than the first threshold. The S-values ​​on the N carrier frequencies of the multi-carrier cell are greater than the second threshold. The S-values ​​on the M high-priority carriers of the multi-carrier cell are greater than the third threshold. Wherein, S is the cell selection receive level value and / or cell selection signal receive quality value, and the high priority carrier frequency is a carrier frequency with a priority higher than a preset priority.

6. The method as described in claim 4 or 5, characterized in that, The R value of the first multi-carrier cell on the first carrier frequency f1 is R. s,f1 The R value R of the second cell on the second carrier frequency f2, which has the same priority as the first carrier frequency f1. n,f2 Calculate according to the following formulas respectively: R s,f 1 = Q meas,s,f1 + Q Hyst,f1 - Qoffset temp,f1 R n,f2 = Q meas,n,f2 – Q offset,f2 - Qoffset temp,f2 Among them, Q meas,s,f1 The RSRP value of the first multi-carrier cell measured by the terminal on the first carrier frequency f1; Q meas,n,f2 The RSRP value of the second cell on the second carrier frequency f2 as measured by the terminal; Q Hyst,f1 The cell reselection hysteresis value on the first carrier frequency f1; Qoffset temp,f1 The offset value temporarily added on the first carrier frequency f1; Qoffset temp,f2 The offset value temporarily added on the second carrier frequency f2; Q offset,f2 When the first carrier frequency f1 and the second carrier frequency f2 are the same, if Qoffset s,n,f2 If valid, it equals Qoffset. s,n,f2 Otherwise, it is 0; when f1 and f2 are different frequencies, if Qoffset s,n,f2 If valid, it equals Qoffset. s,n,f2 +Qoffset frequency,f1 Otherwise, it equals Qoffset. frequency Among them, Qoffset s,n,f2 When both the first multi-carrier cell and the second cell are on carrier frequency f2, the cell-level offset applied for carrier frequency f2; Qoffset frequency,f1 It is a frequency level offset applied to f1 when f2 and f1 have the same priority.

7. The method as described in claim 4 or 5, characterized in that, The carrier level threshold includes a first carrier level threshold and a second carrier level threshold; The signal quality of the first multi-carrier cell is inferior to that of the first signal quality condition, specifically: The signal quality of all carrier frequencies in the first multi-carrier cell is lower than the first threshold value of the corresponding carrier frequency level; Alternatively, the signal quality of at least one carrier frequency in the first multi-carrier cell is lower than the corresponding carrier frequency level first threshold value, wherein the at least one carrier frequency is a pre-specified carrier frequency, or the top X carrier frequencies sorted by priority. The signal quality of the first multi-carrier cell is inferior to that of the second signal quality condition, specifically: The signal quality of all carrier frequencies in the first multi-carrier cell is lower than the second threshold value of the corresponding carrier frequency level.

8. The method as described in claim 7, characterized in that, The signal quality of the carrier frequency includes: Select a receive level value for the cell on the carrier frequency, and / or select a signal reception quality value for the cell on the carrier frequency.

9. The method as described in claim 1, characterized in that, Also includes: The terminal receives system information related to cell access, wherein the system information related to cell access includes at least one of the following: First indication information used to indicate whether a terminal is allowed to access the cell via the target carrier frequency; Second indication information used to indicate whether the terminal is allowed to perform same-frequency reselection on the target carrier frequency; Third indication information used to indicate the list of PLMNs supported by the target carrier frequency; The fourth indication information is used to indicate the tracking area identifier (TAC) corresponding to the target carrier frequency.

10. The method as described in claim 9, characterized in that, Before determining whether to remain in the corresponding cell, the method further includes: Based on the system information related to cell access, determine whether intra-frequency reselection can be performed and / or whether to camp on the corresponding cell.

11. A terminal, characterized in that, Includes transceivers and processors, among which, The transceiver is used to receive system information related to cell selection and / or cell reselection of multi-carrier cells. The processor is used to determine whether to camp on the corresponding cell; wherein, The system information related to cell selection includes at least one of the following: a first value N, a second value M, parameters of the cell selection-related carrier frequency level, and carrier frequency priority within the cell; wherein, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 1; N represents the minimum number of first-class carrier frequencies in the multi-carrier cell selection criteria; M represents the minimum number of second-class carrier frequencies in the multi-carrier cell selection criteria. The system information related to cell reselection includes at least one of the following: a first threshold value for carrier frequency level, a second threshold value for carrier frequency level, carrier frequency priority within the cell, carrier frequencies with the same priority as the cell carrier frequency, a third value X, and parameters of the carrier frequency level related to cell reselection; wherein, X is an integer greater than or equal to 1, and X represents the minimum number of third-class carrier frequencies in the cell currently camped by the terminal that meet the first signal condition when cell reselection is triggered; The multi-carrier cell is a cell with multiple downlink carrier frequencies; the first type of carrier frequency refers to the carrier frequency in the multi-carrier cell whose S value is greater than a second threshold, the second type of carrier frequency refers to the high-priority carrier frequency in the multi-carrier cell whose S value is greater than a third threshold, the S value is the cell selected reception level value and / or the cell selected signal reception quality value on the carrier frequency, the high-priority carrier frequency is the carrier frequency with a priority higher than a preset priority, and the carrier frequency priority within the cell refers to the priority of each carrier frequency; When the terminal is not currently camped on any cell, determining whether to camp on the corresponding cell includes: Based on the system information related to cell selection of the multi-carrier cell, determine whether the multi-carrier cell meets the preset multi-carrier cell selection criteria; If the preset multi-carrier cell selection criteria are met, it is determined to camp on the multi-carrier cell; The multi-carrier cell selection criteria include at least one of the following: The S-value on one carrier frequency of the multi-carrier cell is greater than the first threshold. The S-values ​​on the N carrier frequencies of the multi-carrier cell are greater than the second threshold. The S-values ​​on the M high-priority carriers of the multi-carrier cell are greater than the third threshold. Wherein, the S value is the cell selection reception level value and / or cell selection signal reception quality value on the carrier frequency, and the high priority carrier frequency is a carrier frequency with a priority higher than a preset priority.

12. A terminal, characterized in that, include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method as described in any one of claims 1 to 10.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method as described in any one of claims 1 to 10.

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