CN116266934A

CN116266934A - Cell residence method, information sending method and equipment

Info

Publication number: CN116266934A
Application number: CN202111526960.8A
Authority: CN
Inventors: 李娜; 张慧敏; 赵泉; 刘光毅
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2023-06-20

Abstract

A cell residence method, an information sending method and a device, the cell residence method comprises: the terminal receives system information related to cell selection and/or system information related to cell reselection of the multi-carrier frequency cell; the terminal determines whether to camp on a corresponding cell. The invention transmits the system information related to the cell selection and/or the system information related to the cell reselection of the multi-carrier frequency cell to the terminal through the network, and can provide support for the terminal to realize the cell selection and/or the reselection under the multi-carrier frequency service cell so as to lead the terminal to reside in a proper cell.

Description

Cell residence method, information sending method and equipment

Technical Field

The present invention relates to the field of mobile communications technologies, and in particular, to a cell residence method, an information sending method, and an apparatus.

Background

Compared with C-band (C-band), the Sub-3GHz band has small penetration loss, so the device has better coverage performance. However, compared to C-band, sub-3GHz is allocated sporadically to different operators, and the spectrum bandwidth is relatively narrow. Almost all operators worldwide have multiple sub-3GHz bands (e.g., 700mhz,800mhz,900mhz,1.4GHz,1.8GHz,2.1GHz,2.3GHz,2.6GHz bands). If these sporadic carriers are aggregated into larger bandwidth usage, greater throughput performance improvement will result.

Currently, carrier aggregation (Carrier Aggregation, CA) and supplemental uplink (Supplementary Uplink, SUL) are two effective solutions to aggregate spectrum. However, CA deploys each carrier independently as an independent serving cell. The discrete frequency division multiplexing frequency band (Frequency Division Duplex band, FDD band) which is deployed at the same station and is closer to the same station has similar time-frequency information, path loss, coupling loss, reference signal received power (Reference Signal Received Power, RSRP), quasi co-location (QCL) and the like. But the independent carrier management brings about a lot of unnecessary control signaling overhead, unnecessary synchronization, cell addition/deletion/activation/measurement/mobility and other processes, and accordingly, additional delay is also caused. Furthermore, CA has gain only for connected UEs, which is not enjoyable by idle and inactive UEs. While the SUL scheme supports only one SUL carrier. Based on these considerations, the industry proposes a scheme of aggregating multiple sub-3GHz bands into one serving cell, i.e., a Multi-carrier serving cell (Multi-carrier Serving cell), to use the discontinuous spectrum more efficiently and flexibly.

In the traditional scheme, a cell only has one downlink carrier frequency, and a terminal only measures and calculates one RSRP and RSRQ value when selecting and reselecting the cell. In the multi-carrier service cell scenario, the same cell has multiple downlink carrier frequencies, and the terminal can measure multiple RSRP and RSRQ values for different carrier frequencies in one cell. In this scenario, the conventional cell selection and cell reselection methods will no longer apply.

Disclosure of Invention

At least one embodiment of the invention provides a cell residence method, an information sending method and equipment, which are used for realizing cell residence in a multi-carrier frequency cell.

In order to solve the technical problems, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a cell camping method, including:

the terminal receives system information related to cell selection and/or system information related to cell reselection of the multi-carrier frequency cell;

the terminal determines whether to reside in a corresponding cell;

wherein the cell selection related system information includes at least one of: the first value N, the second value M, the parameters of the cell selection related carrier frequency level and the carrier frequency priority in the cell; wherein N is an integer greater than or equal to 2 and M is an integer greater than or equal to 1; the N represents the minimum number of the first type carrier frequencies in the multi-carrier frequency cell selection criterion; m represents the lowest number of the second class carrier frequencies in the multi-carrier frequency cell selection criterion;

the system information related to cell reselection includes at least one of: carrier frequency level threshold value, carrier frequency level second threshold value, carrier frequency priority in cell, carrier frequency with same priority as carrier frequency in cell, third value X, and parameter of cell reselection related carrier frequency level; wherein, X is an integer greater than or equal to 1; when a terminal resides in a multi-carrier frequency cell, triggering cell reselection if the first X carrier frequencies ordered according to carrier frequency priority are inferior to a first signal quality condition;

The multi-carrier frequency cell is a cell with a plurality of downlink carrier frequencies.

Optionally, the parameters of the cell selection related carrier frequency level include at least one of the following parameters: a minimum reception level value allowed on a target carrier frequency, a minimum reception quality value allowed on the target carrier frequency, a carrier frequency level offset value at the time of public land mobile network PLMN selection, an offset value used on the target carrier frequency at the time of radio resource control RRC connection establishment failure;

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 a target carrier frequency, frequency level offset for a target carrier frequency;

the target carrier frequency is one or more carrier frequencies of the multi-carrier frequency cell.

Optionally, in a case that the terminal is not currently camping on any cell, the determining whether to camp on a corresponding cell includes:

judging whether the multi-carrier frequency cell meets a preset multi-carrier frequency cell selection criterion according to the related system information of cell selection of the multi-carrier frequency cell;

determining to reside in the multi-carrier cell under the condition that a preset multi-carrier cell selection criterion is met;

Wherein the multi-carrier cell selection criteria comprises at least one of:

the S value on one carrier frequency of the multi-carrier frequency cell is larger than a first threshold value;

s values on N carrier frequencies of the multi-carrier frequency cell are larger than a second threshold value;

the S value on M high-priority carrier frequencies of the multi-carrier frequency cell is larger than a third threshold value;

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

Optionally, the cell selection reception level value Srxlev, f and the cell selection signal reception quality value square, f on the carrier frequency f are calculated according to the following formulas, respectively:

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

wherein: q (Q) _rxlevmeas,f Selecting a reception level value for the cell measured on carrier frequency f;

Q _qualmeas,f selecting a signal reception quality value for the cell measured on carrier frequency f;

Q _rxlevmin,f a minimum receiving level value allowed on carrier frequency f for the multi-carrier frequency cell;

Q _qualmin,f a minimum received quality value allowed on carrier frequency f for the multi-carrier cell;

Q _{rxlevminoffset,f} and Q _{qualminoffset,f} Carrier frequency level offset values considered when searching for higher priority PLMNs for terminals normally residing on the VPLMN;

P _compensation compensating parameters for a terminal level;

Qoffset _temp,f is the offset value used on carrier frequency f when the RRC connection establishment fails.

Optionally, in the case that the terminal currently resides in the first multi-carrier frequency cell, the determining whether to reside in the corresponding cell includes at least one of:

if the first carrier frequency priority is higher than the highest carrier frequency priority of the first multi-carrier frequency cell, and a first cell meeting a multi-carrier frequency cell selection criterion or a single carrier frequency cell selection criterion exists on the carrier frequency of the first carrier frequency priority, determining to reselect to the first cell;

under the condition that the signal of the first multi-carrier frequency cell is inferior to the first signal quality condition, according to the priority order of each carrier frequency of the first multi-carrier frequency cell, the following judgment processing is sequentially carried out for each carrier frequency of the first multi-carrier frequency cell until the fact that the second cell is reselected or all carrier frequencies are judged is determined to be finished: judging whether a second cell meeting a first preset condition exists on the carrier frequency with the same priority as the current carrier frequency of the first multi-carrier frequency cell, and if so, determining to reselect to the second cell, wherein the first preset condition comprises the following steps: a frequency level cell reselection criterion, a multi-carrier frequency cell selection criterion or a single carrier frequency cell selection criterion;

and if the signal of the first multi-carrier frequency cell is inferior to the second signal quality condition, if the second carrier frequency priority is lower than the lowest carrier frequency priority of the first multi-carrier frequency cell, and a third cell meeting the multi-carrier frequency cell selection criterion or the single carrier frequency cell selection criterion exists on the carrier frequency of the second carrier frequency priority, determining to reselect to the third cell.

Optionally, the cell reselection criteria at the frequency level are: the R value of the first multi-carrier frequency 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 meet the cell reselection criterion;

the cell selection criterion of the single carrier frequency is that the S value on the cell carrier frequency is larger than a fourth threshold value;

the multi-carrier cell selection criteria includes at least one of:

and the S value is a cell selection receiving level value and/or a cell selection signal receiving quality value, and the carrier frequency with high priority is a carrier frequency with priority higher than a preset priority.

Optionally, the R value R of the first multi-carrier cell on the first carrier frequency f1 _s,f1 R value R of the second cell on a second carrier frequency f2 of the same priority as the first carrier frequency f1 _n,f2 The calculation is carried out according to the following formulas:

R _s,f1 ＝Q _meas,s,f1 +Q _Hyst,f1 -Qoffset _temp,f1

R _n,f2 ＝Q _meas,n,f2 –Q _offset,f2 -Qoffset _temp,f2

wherein Q is _meas,s,f1 The RSRP value of the first multi-carrier frequency cell on the first carrier frequency f1 measured by the terminal is used for the terminal;

Q _meas,n,f2 an RSRP value for a second cell on a second carrier frequency f2 measured by the terminal;

Q _Hyst,f1 A hysteresis value for cell reselection on a first carrier frequency f 1;

Qoffset _temp,f1 an offset value temporarily added on a first carrier frequency f 1;

Qoffset _temp,f2 an offset value temporarily added on a second carrier frequency f 2;

Q _offset,f2 : if Qoffset when the first carrier frequency f1 and the second carrier frequency f2 are the same frequency _s,n,f2 Is effective and equal to Qoffset _s,n,f2 The method comprises the steps of carrying out a first treatment on the surface of the Otherwise, 0; when f1 and f2 are different frequencies, if Qoffset _s,n,f2 Is effective and equal to Qoffset _s,n,f2 +Qoffset _frequency,f1 The method comprises the steps of carrying out a first treatment on the surface of the Otherwise equal to Qoffset _frequency The method comprises the steps of carrying out a first treatment on the surface of the Wherein Qoffset _s,n,f2 A cell level offset for carrier frequency f2 applied when both the first multi-carrier frequency cell and the second cell are on carrier frequency f 2; qoffset _frequency,f1 Is the frequency level offset for f1 applied when f2 and f1 have the same priority.

Optionally, the carrier frequency level threshold value includes a carrier frequency level first threshold value and a carrier frequency level second threshold value;

the signal of the first multi-carrier frequency cell is inferior to a first signal quality condition, specifically:

the signal quality of all carrier frequencies of the first multi-carrier frequency cell is lower than a corresponding carrier frequency level first threshold value;

or, the signal quality of at least one carrier frequency of the first multi-carrier frequency cell is lower than a corresponding carrier frequency level first threshold value, wherein the at least one carrier frequency is a pre-designated carrier frequency or the first X carrier frequencies which are ordered according to the priority;

The signal of the first multi-carrier frequency cell is inferior to the second signal quality condition, specifically:

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

Optionally, the signal quality of the carrier frequency includes:

a cell selection reception level value on the carrier frequency and/or a cell selection signal reception quality value on the carrier frequency.

Optionally, the method further comprises:

the terminal receives system information related to cell access, wherein the system information related to cell access comprises at least one of the following:

first indication information for indicating whether the terminal is allowed to access the cell through the target carrier frequency;

second indication information for indicating whether the terminal is allowed to perform the same-frequency reselection on the target carrier frequency;

third indication information for indicating a PLMN list supported by the target carrier frequency;

fourth indication information for indicating the tracking area identifier TAC corresponding to the target carrier frequency.

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

and judging whether the same-frequency reselection can be performed and/or whether the cell is resided in a corresponding cell or not according to the system information related to the cell access.

In a second aspect, an embodiment of the present invention provides an information sending method, where the method includes:

the network side equipment sends the system information related to cell selection and/or the system information related to cell reselection of the multi-carrier frequency cell to the terminal; wherein,,

the cell selection related system information includes at least one of: the first value N, the second value M, the parameters of the cell selection related carrier frequency level and the carrier frequency priority in the cell; wherein N is an integer greater than or equal to 2 and M is an integer greater than or equal to 1; the N represents the minimum number of the first type carrier frequencies in the multi-carrier frequency cell selection criterion; m represents the lowest number of the second class carrier frequencies in the multi-carrier frequency cell selection criterion;

the system information related to cell reselection includes at least one of: carrier frequency level threshold value, carrier frequency level second threshold value, carrier frequency priority in cell, carrier frequency with same priority as carrier frequency in cell, third value X, and parameter of cell reselection related carrier frequency level; wherein, X is an integer greater than or equal to 1; the X represents that in a multi-carrier frequency cell where a terminal currently resides, if the first X carrier frequencies ordered according to the carrier frequency priority are inferior to a first signal quality condition, cell reselection is triggered;

Optionally, the carrier frequency level threshold value includes:

a carrier frequency level first threshold value for determining whether a signal of a multi-carrier frequency cell in which the terminal currently resides is inferior to a first signal quality condition; and/or the number of the groups of groups,

and a carrier frequency level second threshold value for determining whether a signal of a multi-carrier frequency cell in which the terminal is currently camping is inferior to a second signal quality condition.

Optionally, the parameters of the cell selection related carrier frequency level include at least one of the following parameters: a minimum reception level value allowed on the target carrier frequency, a minimum reception quality value allowed on the target carrier frequency, a carrier frequency level offset value when public land mobile network PLMN selection is involved, an offset value used on the target carrier frequency when radio resource control RRC connection establishment fails;

Optionally, the method further comprises:

Transmitting cell access related system information to the terminal, wherein the cell access related system information comprises at least one of the following:

In a third aspect, embodiments of the present invention provide a terminal comprising a transceiver and a processor, wherein,

the transceiver is configured to receive system information related to cell selection and/or system information related to cell reselection of a multi-carrier cell;

the processor is configured to determine whether to camp on a corresponding cell; wherein,,

The system information related to cell reselection includes at least one of: a carrier frequency level first threshold value, a carrier frequency level second threshold value, a carrier frequency priority in a cell, a carrier frequency with the same priority as the carrier frequency of the cell, a third numerical value X and a parameter of a cell reselection related carrier frequency level; wherein, X is an integer greater than or equal to 1, and represents the minimum number of third carrier frequencies satisfying the first signal condition in the cell where the terminal currently resides when triggering cell reselection;

In a fourth aspect, an embodiment of the present invention provides a terminal, including: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method as described in the first aspect.

In a fifth aspect, an embodiment of the present invention provides a network-side device, including a transceiver and a processor, where,

the transceiver is configured to send system information related to cell selection and/or system information related to cell reselection of the multi-carrier cell to the terminal; wherein,,

In a sixth aspect, an embodiment of the present invention provides a network side device, including: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method as described in the second aspect.

In a seventh aspect, embodiments of the present invention provide a computer readable storage medium having stored thereon a program which, when executed by a processor, implements the steps of the method as described above.

Compared with the prior art, the cell residence method, the information sending method and the equipment provided by the embodiment of the invention send the system information related to the cell selection and/or the system information related to the cell reselection of the multi-carrier frequency cell to the terminal through the network, and can provide support for the terminal to realize the cell selection and/or the cell reselection under the multi-carrier service cell so as to ensure that the terminal resides in a proper cell.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention;

fig. 2 is a flowchart of a cell residence method according to an embodiment of the present invention when applied to a terminal side;

fig. 3 is a flowchart of an information sending method provided by an embodiment of the present invention when applied to a base station side;

fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a network side device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a network side device according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram of a terminal according to still another embodiment of the present invention;

fig. 9 is a schematic structural diagram of a network side device according to another embodiment of the present invention.

Detailed Description

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

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. "and/or" in the specification and claims means at least one of the connected objects.

The techniques described herein are not limited to NR systems and long term evolution (Long Time Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems and may also be used for various wireless communication systems such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. A CDMA system may implement radio technologies such as CDMA2000, universal terrestrial radio access (Universal Terrestrial Radio Access, UTRA), and the like. UTRA includes wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as the global system for mobile communications (Global System for Mobile Communication, GSM). OFDMA systems may implement radio technologies such as ultra mobile broadband (UltraMobile Broadband, UMB), evolved UTRA (E-UTRA), IEEE 802.21 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, and the like. UTRA and E-UTRA are parts of the universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS). LTE and higher LTE (e.g., LTE-a) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-a and GSM are described in the literature from an organization named "third generation partnership project" (3rd Generation Partnership Project,3GPP). CDMA2000 and UMB are described in the literature from an organization named "third generation partnership project 2" (3 GPP 2). The techniques described herein may be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. However, the following description describes an NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.

The following description provides examples and does not limit the scope, applicability, or configuration as set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Referring to fig. 1, fig. 1 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a User terminal or a User Equipment (UE), and the terminal 11 may be a terminal-side Device such as a mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer), a personal digital assistant (Personal Digital Assistant, PDA), a mobile internet Device (Mobile Internet Device, MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, which is not limited to a specific type of the terminal 11 in the embodiment of the present invention. The network device 12 may be a base station and/or a core network element, where the base station may be a 5G or later version base station (e.g., a gNB, a 5G NR NB, etc.), or a base station in another communication system (e.g., an eNB, a WLAN access point, or other access points, etc.), where the base station may be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, a BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, and the base station is not limited to a specific technical vocabulary, and in the embodiment of the present invention, the base station in the NR system is merely an example, but is not limited to a specific type of the base station.

The base stations may communicate with the terminal 11 under the control of a base station controller, which may be part of the core network or some base stations in various examples. Some base stations may communicate control information or user data with the core network over a backhaul. In some examples, some of these base stations may communicate with each other directly or indirectly over a backhaul link, which may be a wired or wireless communication link. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multicarrier transmitter may transmit modulated signals on the multiple carriers simultaneously. For example, each communication link may be a multicarrier 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, and so on.

The base station may communicate wirelessly with the terminal 11 via one or more access point antennas. Each base station may provide communication coverage for a respective corresponding coverage area. The coverage area of an access point may be partitioned into sectors that form only a portion of that coverage area. A wireless communication system may include different types of base stations (e.g., macro base stations, micro base stations, or pico base stations). The base station may also utilize different radio technologies, such as cellular or WLAN radio access technologies. The 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 utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks, may overlap.

The communication link in the wireless communication system may include an Uplink for carrying Uplink (UL) transmissions (e.g., from the terminal 11 to the network device 12) or a Downlink for carrying Downlink (DL) transmissions (e.g., from the network device 12 to the terminal 11). UL transmissions may also be referred to as reverse link transmissions, while DL transmissions may also be referred to as forward link transmissions. Downlink transmissions may be made using licensed bands, unlicensed bands, or both. Similarly, uplink transmissions may be made using licensed bands, unlicensed bands, or both.

The cell selection and cell reselection in the prior art will be briefly described first.

In the conventional scheme, a cell only has one downlink carrier frequency, and a terminal usually only measures and calculates one RSRP and reference signal receiving quality (Reference Signal Received Quality, RSRQ value) when performing cell selection and cell reselection. In a multi-carrier cell scenario, a cell may have multiple downlink carrier frequencies, and a terminal may measure multiple RSRP and RSRQ values for different carrier frequencies in a cell. In this scenario, the conventional cell selection and cell reselection methods will no longer apply. The multi-carrier cell described herein may specifically be a cell with multiple downlink carrier frequencies.

The conventional cell selection and cell reselection method is specifically as follows:

the purpose of cell selection is to enable the UE to select a cell with channel quality meeting the condition for residence as soon as possible after the UE is started. Cell selection mainly includes two main categories: initial cell selection and cell selection based on stored information. In the initial cell selection process, it means that the UE needs to search the strongest cell on each carrier frequency according to its own capability, and calculates whether the cell on the carrier frequency meets the S criterion. Once a suitable cell is found, the UE will camp on that cell. The S criteria for cell selection are as follows:

srxlev >0AND square >0, wherein:

Srxlev＝Q _rxlevmeas –(Q _rxlevmin +Q _{rxlevminoffset} )–P _compensation -Qoffset _temp

Squal＝Q _qualmeas –(Q _qualmin +Q _{qualminoffset} )-Qoffset _temp

among the above parameters:

srxlev represents the reception level in cell search, such as RSRP;

square represents the received signal quality in the cell search;

Q _rxlevmeas a reception level value representing the measured cell selection;

Q _rxlevmin representing a minimum reception level;

Q _{rxlevminoffset} an offset value representing a minimum reception level;

P _compensation representing terminal-level compensation parameters;

Qoffset _temp an offset value used when the RRC connection establishment fails;

Q _qualmeas indicating a measured cell selection received signal quality value, such as RSRQ;

Q _qualmin representing a minimum received signal quality;

Q _{qualminoffset} an offset value representing the minimum received signal quality.

The purpose of cell reselection is to ensure that the UE camps on a cell with better signal quality. While a cell is camping, the UE will continue to make measurements for that cell. The UE measures the serving cell RSRP value Srxlev. For inter-frequency or inter-system high priority frequencies, the UE always makes inter-frequency/inter-system measurements. If the inter-frequency priority is lower than the current serving carrier frequency priority and the serving cell Srxlev >S _{nonIntraSearchP} The UE does not perform inter-frequency measurements, otherwise it needs to turn on inter-frequency low priority cell measurements. If the serving cell Srxlev>S _IntraSearchP The UE does not perform co-channel measurements. For reselection of cells of the same frequency or frequency priority, the R criterion is employed, and at cell reselection, the RSRP is typically measured. And sequencing the candidate cells according to the R criterion according to the signal quality, and selecting an optimal cell, wherein the method comprises the following steps of:

R _s ＝Q _meas,s +Q _Hyst -Qoffset _temp

R _n ＝Q _meas,n –Q _offset -Qoffset _temp

wherein Q is _meas,s A measured RSRP value representing the serving cell;

Q _Hyst representing a serving cell reselection hysteresis value;

Qoffset _temp an offset value indicating temporary addition;

Q _meas,n an RSRP value representing the measured candidate cell;

Q _offset representing an offset value;

when the candidate cell is ranked earlier than the serving cell and the duration exceeds the threshold treselection and the time the UE is camping on the current serving cell exceeds a certain duration (e.g., 1 second), the UE reselects to the candidate cell.

After introducing the multi-carrier frequency service cell, a scheme for selecting and reselecting the multi-carrier frequency service cell is needed, and the embodiment of the invention provides a cell selecting and reselecting method suitable for the situation of the multi-carrier frequency service cell and designs related system information so as to better support the application scenario of the multi-carrier frequency service cell.

Specifically, the embodiment of the invention comprises the following steps:

for cell selection: the UE may calculate S values on different frequency bands of the multi-carrier cell based on the frequency level cell selection parameters, and determine whether the multi-carrier cell may camp on based on the multi-carrier cell selection criteria. Therefore, the problem that the UE cannot select the multi-carrier frequency cell because the S value of the current measurement carrier frequency does not meet the requirement can be avoided, and the UE can be ensured to select a cell meeting the cell selection criterion more quickly.

For cell reselection: in the prior art, on-channel cell reselection involves only one frequency, whereas in a multi-carrier cell, on-channel involves multiple frequencies. How to perform cell reselection among the plurality of co-frequencies and on the equally prioritized frequencies to which the plurality of co-frequencies correspond is not considered in the prior art. Aiming at the problem, a triggering condition of cell reselection and an R criterion based on frequency level parameters are designed, so that unnecessary cell reselection process caused by that the quality of a single carrier frequency of UE does not meet the threshold requirement is avoided, and the UE is ensured to reside in a cell meeting the quality requirement as much as possible.

Referring to fig. 2, a cell residence method provided in an embodiment of the present invention, when applied to a terminal side, includes:

Step 21, the terminal receives the system information related to cell selection and/or the system information related to cell reselection of the multi-carrier frequency cell.

In the embodiment of the invention, the terminal receives the system information sent by the network side equipment (such as a base station). The multi-carrier frequency cell is a cell with a plurality of downlink carrier frequencies. The cell selection related system information may include at least one of: the first value N, the second value M, the parameters of the cell selection related carrier frequency level and the carrier frequency priority in the cell; wherein N is an integer greater than or equal to 2 and M is an integer greater than or equal to 1; the N represents the minimum number of the first type carrier frequencies in the multi-carrier frequency cell selection criterion; m represents the lowest number of carrier frequencies of the second class in the multi-carrier cell selection criterion. The first carrier frequency is the carrier frequency with S value larger than the second threshold value in the multi-carrier frequency cell, the second carrier frequency is the high priority carrier frequency with S value larger than the third threshold value in the multi-carrier frequency cell, the S value is the cell selection receiving level value and/or the cell selection signal receiving quality value on the carrier frequency, and the high priority carrier frequency is the carrier frequency with priority higher than the preset priority. The priority of carrier frequencies in a cell refers to the priority of each carrier frequency.

More specifically, the method comprises the steps of,

the parameters of the cell selection related carrier frequency level include at least one of the following parameters: the minimum allowed reception level value on the target carrier frequency, the minimum allowed reception quality value on the target carrier frequency, the carrier frequency level offset value at the time of public land mobile network PLMN selection, the offset value used on the target carrier frequency at the time of radio resource control RRC connection establishment failure. The target carrier frequency is one or more carrier frequencies of the multi-carrier frequency cell.

The system information related to cell reselection includes at least one of: carrier frequency level threshold value, carrier frequency level second threshold value, carrier frequency priority in cell, carrier frequency with same priority as carrier frequency in cell, third value X, and parameter of cell reselection related carrier frequency level; wherein, X is an integer greater than or equal to 1; and when the terminal resides in the multi-carrier frequency cell, triggering cell reselection if the first X carrier frequencies ordered according to the carrier frequency priority are inferior to the first signal quality condition.

More specifically, the carrier frequency level threshold value includes a carrier frequency level first threshold value and/or a carrier frequency level second threshold value, that is:

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 a target carrier frequency, frequency level offset for a target carrier frequency; the target carrier frequency is one or more carrier frequencies of the multi-carrier frequency cell.

In addition, it should be noted that various carrier frequency level parameters, such as carrier frequency level offset value, carrier frequency level cell reselection hysteresis value, carrier frequency level temporary offset, etc., are all parameters set for the corresponding carrier frequency.

In step 22, the terminal determines whether to camp on the corresponding cell.

Here, the terminal may determine whether to camp on the corresponding cell according to the system information received in step 21. For example, when the terminal is not currently camping on any cell, it may be determined whether to camp on the corresponding cell according to the received system information related to cell selection of the multi-carrier cell. For another example, when the terminal currently resides in a certain cell, whether to reselect to a corresponding cell may be determined according to the received system information related to cell reselection of the multi-carrier cell.

Through the steps, the embodiment of the invention sends the system information related to the cell selection and/or the system information related to the cell reselection of the multi-carrier frequency cell to the terminal through the network, and can provide support for the terminal to realize the cell selection and/or the reselection under the multi-carrier service cell so as to lead the terminal to reside in a proper cell.

For example, the above embodiments introduce frequency level cell selection parameters into the S criterion calculation, based on which the UE can calculate S values on different frequency bands of the multi-carrier cell and determine whether the multi-carrier cell can camp on based on the proposed multi-carrier cell selection criterion. Therefore, the problem that the UE cannot select the multi-carrier frequency cell because the S value of the current measurement carrier frequency does not meet the requirement can be avoided, and the UE can select a cell meeting the cell selection criterion more quickly. Cell selection is described in more detail below.

In the case that the terminal is not currently camping on any cell, in the above step 22, determining whether to camp on the corresponding cell specifically includes:

a) And judging whether the multi-carrier frequency cell meets a preset multi-carrier frequency cell selection criterion or not according to the system information related to the cell selection of the multi-carrier frequency cell. Wherein the multi-carrier cell selection criteria comprises at least one of:

(1) And the S value on one carrier frequency of the multi-carrier frequency cell is larger than a first threshold value, namely, as long as the S value of one carrier frequency in the multi-carrier frequency cell is larger than the first threshold value, the multi-carrier frequency cell selection criterion is considered to be met.

(2) S values on N carrier frequencies of the multi-carrier frequency cell are larger than a second threshold value.

(3) And S values on M high-priority carrier frequencies of the multi-carrier frequency cell are larger than a third threshold value.

The S value is a cell selection receiving level value and/or a cell selection signal receiving quality value on the carrier frequency, and the carrier frequency with high priority is a carrier frequency with priority higher than a preset priority. The first threshold, the second threshold, and the third threshold may be the same or different, and as an example, may all be set to 0.

b) And determining to reside in the multi-carrier cell under the condition that a preset multi-carrier cell selection criterion is met.

In the embodiment of the invention, considering that a plurality of carrier frequencies exist in a multi-carrier frequency cell, taking a certain carrier frequency f as an example, the calculation of the S value is specifically as follows: the cell selection reception level value Srxlev, f and the cell selection signal reception quality value square, f on the carrier frequency f are calculated according to the following formulas, respectively:

Q _{rxlevminoffset,f} and Q _{qualminoffset,f} Carrier frequency level offset values considered when searching for higher priority PLMNs for terminals normally residing on the Visited PLMN (VPLMN);

P _compensation compensating parameters for a terminal level;

Specifically, srxlev, f, square, f, Q _rxlevmeas,f 、Q _qualmeas,f 、Q _rxlevmin,f 、Q _qualmin,f May all be in dB.

For another example, the above embodiment designs the triggering condition of cell reselection and the R criterion based on the frequency level parameter, so as to avoid unnecessary cell reselection process caused by that the quality of a certain carrier frequency in the multi-carrier frequency cell does not meet the threshold requirement, so that the UE resides in the cell meeting the quality requirement as much as possible. Cell reselection is described in more detail below.

In the case that the terminal is currently camping on a multi-carrier cell, such as the first multi-carrier cell, in the above step 22, determining whether to camp on a corresponding cell specifically includes:

a) And if the first carrier frequency priority is higher than the highest carrier frequency priority of the first multi-carrier frequency cell, and the first cell meeting the multi-carrier frequency cell selection criterion or the single carrier frequency cell selection criterion exists on the carrier frequency of the first carrier frequency priority, determining to reselect to the first cell.

Here, when there is a first cell with higher frequency priority, it is determined to reselect to the first cell if the first cell also satisfies a multi-carrier cell selection criterion or a single carrier cell selection criterion. For details of the multi-carrier cell selection criteria, please refer to the above description, and the details are not repeated here. The single carrier frequency cell selection criteria may refer to the prior art or to the content of conventional cell selection above.

The first cell may be a single carrier frequency cell or a multi-carrier frequency cell. When the first cell is a single carrier frequency cell, if the carrier frequency of the first cell meets the single carrier frequency cell selection criterion and the priority of the carrier frequency is higher than the highest carrier frequency priority of the first multi-carrier frequency cell where the first cell currently resides, the first cell can be reselected. When the first cell is a multi-carrier cell, if a carrier frequency of the first cell meets the multi-carrier cell selection criterion and the carrier frequency priority is higher than the highest carrier frequency priority of the first multi-carrier cell where the first cell currently resides, the first cell can be reselected.

b) Under the condition that the signal of the first multi-carrier frequency cell is inferior to the first signal quality condition, according to the priority order of each carrier frequency of the first multi-carrier frequency cell, the following judgment processing is sequentially carried out for each carrier frequency of the first multi-carrier frequency cell until the fact that the second cell is reselected or all carrier frequencies are judged is determined to be finished: judging whether a second cell meeting a first preset condition exists on the carrier frequency with the same priority as the current carrier frequency of the first multi-carrier frequency cell, and if so, determining to reselect to the second cell, wherein the first preset condition comprises the following steps: cell reselection criteria at the frequency level, multi-carrier cell selection criteria or single carrier cell selection criteria.

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

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

(2) The signal quality of at least one carrier frequency of the first multi-carrier frequency cell is lower than a corresponding carrier frequency level first threshold value, wherein the at least one carrier frequency is a pre-designated carrier frequency or the first X carrier frequencies which are ordered according to the priority.

Herein, the signal quality of the carrier frequency may include: a cell selection reception level value on the carrier frequency and/or a cell selection signal reception quality value on the carrier frequency.

And under the condition that the signal of the first multi-carrier frequency cell is inferior to the first signal quality condition, sequencing the carrier frequencies of the first multi-carrier frequency cell according to the carrier frequency priority, and then judging each carrier frequency in sequence until the fact that the second cell is reselected or all carrier frequencies are judged is determined. When judging a carrier frequency (for convenience of description, referred to herein as a current carrier frequency) of a first multi-carrier frequency cell, judging whether a second cell meeting a first preset condition exists on the carrier frequency with the same priority as the current carrier frequency, if so, determining to reselect the second cell, and if not, continuing to judge the carrier frequency of the next priority.

The first preset condition refers to: the first multi-carrier frequency cell and the second cell meet the cell reselection criterion of the frequency level, and the second cell meets the multi-carrier frequency cell selection criterion or the single carrier frequency cell selection criterion.

The cell reselection criterion between the first multi-carrier frequency cell and the second cell meets the frequency level is specifically as follows: the R value of the first multi-carrier cell on the current carrier frequency (hereinafter referred to as the first carrier frequency for convenience of description) and the R value of the second cell on the carrier frequency (hereinafter referred to as the second carrier frequency for convenience of description) having the same priority as the current carrier frequency satisfy the cell reselection criterion. For the specific content of the cell reselection criterion of the frequency level, reference may be made to a cell reselection criterion of the prior art, for example, R criterion, i.e. the R value of the second cell on the second carrier frequency is larger than the R value of the first multi-carrier frequency cell on the first carrier frequency, and the second cell may be reselected if the duration exceeds a certain preset threshold. In addition, the R criterion may further require that the duration of the terminal camping on the first multi-carrier cell exceeds a preset duration.

Here, the R value R of the first multi-carrier cell on the first carrier frequency f1 _s,f1 R value R of the second cell on a second carrier frequency f2 of the same priority as the first carrier frequency f1 _n,f2 The calculation can be performed according to the following formulas:

R _s,f1 ＝Q _meas,s,f1 +Q _Hyst,f1 -Qoffset _temp,f1

R _n,f2 ＝Q _meas,n,f2 –Q _offset,f2 -Qoffset _temp,f2

Q _offset,f2 : if Qoffset when the first carrier frequency f1 and the second carrier frequency f2 are the same frequency _s,n,f2 Is effective and equal to Qoffset _s,n,f2 The method comprises the steps of carrying out a first treatment on the surface of the Otherwise, 0; when f1 and f2 are different frequencies, if Qoffset _s,n,f2 Is effective and equal to Qoffset _s,n,f2 +Qoffset _frequency,f1 The method comprises the steps of carrying out a first treatment on the surface of the Otherwise equal to Qoffset _frequency The method comprises the steps of carrying out a first treatment on the surface of the Wherein Qoffset _s,n,f2 A cell level offset for carrier frequency f2 applied when both the first multi-carrier frequency cell and the second cell are on carrier frequency f 2; qoff (Qoff)set _frequency,f1 Is the frequency level offset for f1 applied when f2 and f1 have the same priority.

The second cell meets the multi-carrier frequency cell selection criterion or the single carrier frequency cell selection criterion, and specifically comprises the following steps: when the second cell is a multi-carrier frequency cell, the second cell meets a multi-carrier frequency cell selection criterion; when the second cell is a single carrier frequency cell, the second cell satisfies a single carrier frequency cell selection criterion. Specifically, the multi-carrier cell selection criteria or the single carrier cell selection criteria may refer to the above, and will not be described herein.

c) And if the signal of the first multi-carrier frequency cell is inferior to the second signal quality condition, if the second carrier frequency priority is lower than the lowest carrier frequency priority of the first multi-carrier frequency cell, and a third cell meeting the multi-carrier frequency cell selection criterion or the single carrier frequency cell selection criterion exists on the carrier frequency of the second carrier frequency priority, determining to reselect to the third cell.

Here, the signal of the first multi-carrier cell is inferior to the second signal quality condition, specifically: the signal quality of all carrier frequencies of the first multi-carrier frequency cell is lower than the corresponding carrier frequency level second threshold value. Typically, the second signal quality condition is worse than the first signal quality condition, i.e. the second threshold value is typically smaller than the first threshold value if the received level or the received signal quality is taken as a measure of the signal quality.

In the embodiment of the invention, the network can also broadcast the related parameters of the cell access in the system information to indicate the information such as the carrier frequency which allows the terminal to access or prohibits the terminal from accessing. Specifically, the terminal may receive system information related to cell access, where the system information related to cell access includes at least one of the following:

1) First indication information for indicating whether the terminal is allowed to access the cell through the target carrier frequency;

2) Second indication information for indicating whether the terminal is allowed to perform the same-frequency reselection on the target carrier frequency;

3) Third indication information for indicating a PLMN list supported by the target carrier frequency;

4) Fourth indication information for indicating a tracking area identifier (TAC) corresponding to the target carrier frequency.

The above target carrier frequencies are one or some carrier frequencies.

In this way, the terminal can determine whether the same-frequency reselection can be performed and/or whether the terminal resides in a corresponding cell according to the system information related to the cell access.

For example, in the conventional scheme, parameters such as PLMN identification list (PLMN-identity list), tracking area identification (tracking area code), cell barred access indication (cellBarred), intra-frequency cell reselection (intra freqreselection) are configured uniquely for each cell. After introducing the multi-carrier serving cell, the embodiment of the invention configures parameters for each carrier frequency respectively. For example, the number of the cells to be processed,

-a "cellBarred" indication based on a specific carrier frequency (frequency-specific) for the UE to determine whether a cell can be accessed through that carrier frequency;

-based on a frequency-specific "intra freqreselection" indication, for the UE to determine whether co-channel reselection on the carrier frequency is allowed;

-based on the frequency-specific "PLMN-identity list" indication, for the UE to determine a PLMN list supported by the carrier frequency;

-based on the frequency-specific "tracking area code" indication, for the UE to determine the TAC corresponding to the carrier frequency.

Referring to fig. 3, an embodiment of the present invention further provides an information sending method, applied to a network side device (such as a base station), where the method includes:

step 31, the network side equipment sends the system information related to the cell selection and/or the system information related to the cell reselection of the multi-carrier frequency cell to the terminal; wherein,,

Through the steps, the network side equipment sends the system information to the terminal, so that support can be provided for the terminal to realize cell selection and/or reselection under the multi-carrier service cell, and the terminal can reside in a proper cell.

Specifically, the carrier frequency level threshold value includes:

The parameters of the cell selection related carrier frequency level include at least one of the following parameters: a minimum reception level value allowed on the target carrier frequency, a minimum reception quality value allowed on the target carrier frequency, a carrier frequency level offset value when public land mobile network PLMN selection is involved, an offset value used on the target carrier frequency when radio resource control RRC connection establishment fails;

In addition, the network side device may further send cell access related system information to the terminal, where the cell access related system information includes at least one of the following:

The foregoing describes various methods of embodiments of the present invention. An apparatus for carrying out the above method is further provided below.

Referring to fig. 4, an embodiment of the present invention further provides a terminal 400, including:

a first receiving module 401, configured to receive system information related to cell selection and/or system information related to cell reselection of a multi-carrier cell;

a first determining module, configured to determine whether to camp on a corresponding cell;

Optionally, the carrier frequency level threshold value includes:

Optionally, the first determining module includes:

a cell selection module, configured to determine, according to system information related to cell selection of the multi-carrier cell, whether the multi-carrier cell meets a preset multi-carrier cell selection criterion when the terminal is not currently resident in any cell;

wherein the multi-carrier cell selection criteria comprises at least one of:

P _compensation compensating parameters for a terminal level;

Optionally, the first determining module includes:

a cell reselection module, configured to determine, in case the terminal currently resides in a first multi-carrier frequency cell, whether to reside in a corresponding cell according to at least one of the following manners:

the multi-carrier cell selection criteria includes at least one of:

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

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

Optionally, the signal quality of the carrier frequency includes:

Optionally, the terminal further includes:

a second receiving module, configured to receive system information related to cell access, where the system information related to cell access includes at least one of:

Optionally, the terminal further includes:

and the judging module is used for judging whether the same-frequency reselection can be carried out and/or whether the corresponding cell is resided or not according to the system information related to the cell access before determining whether the corresponding cell is resided or not.

The apparatus in this embodiment corresponds to the method shown in fig. 2, and the implementation manner in each embodiment is applicable to the embodiment of the apparatus, so that the same technical effects can be achieved. The device provided by the embodiment of the invention can realize all the method steps realized by the embodiment of the method and can achieve the same technical effects, and the parts and the beneficial effects which are the same as those of the embodiment of the method in the embodiment are not described in detail.

Referring to fig. 5, an embodiment of the present invention further provides a terminal 500, including: a transceiver 501 and a processor 502;

the transceiver 501 is configured to receive system information related to cell selection and/or system information related to cell reselection of a multi-carrier cell;

the processor 502 is configured to determine whether to camp on a corresponding cell;

Optionally, the carrier frequency level threshold value includes:

Optionally, the processor is further configured to determine, according to the system information related to cell selection of the multi-carrier cell, whether the multi-carrier cell meets a preset multi-carrier cell selection criterion when the terminal is not currently resident in any cell;

wherein the multi-carrier cell selection criteria comprises at least one of:

P _compensation Compensating parameters for a terminal level;

Optionally, the processor is further configured to, in a case where the terminal currently camps on the first multi-carrier frequency cell, determine whether to camp on a corresponding cell according to at least one of the following manners:

the multi-carrier cell selection criteria includes at least one of:

R _s,f1 ＝Q _meas,s,f1 +Q _Hyst,f1 -Qoffset _temp,f1

R _n,f2 ＝Q _meas,n,f2 –Q _offset,f2 -Qoffset _temp,f2

Optionally, the signal quality of the carrier frequency includes:

Optionally, the transceiver is further configured to receive system information related to cell access, where the system information related to cell access includes at least one of:

Optionally, the processor is further configured to determine, before determining whether to camp on a corresponding cell, whether to perform co-channel reselection and/or whether to camp on the corresponding cell according to the system information related to cell access.

Referring to fig. 6, an embodiment of the present invention further provides a network side device 600, including:

a first sending module 601 sends system information related to cell selection and/or system information related to cell reselection of a multi-carrier cell to a terminal; wherein,,

Optionally, the carrier frequency level threshold value includes:

Optionally, the network side device further includes:

a second sending module, configured to send cell access related system information to the terminal, where the cell access related system information includes at least one of:

The apparatus in this embodiment corresponds to the method shown in fig. 3, and the implementation manner in each embodiment is applicable to the embodiment of the apparatus, so that the same technical effects can be achieved. The device provided by the embodiment of the invention can realize all the method steps realized by the embodiment of the method and can achieve the same technical effects, and the parts and the beneficial effects which are the same as those of the embodiment of the method in the embodiment are not described in detail.

Referring to fig. 7, an embodiment of the present invention further provides a network side device 700, including: a transceiver 701 and a processor 702;

the transceiver 701 is configured to send, to a terminal, system information related to cell selection and/or system information related to cell reselection of a multi-carrier cell; wherein,,

Optionally, the carrier frequency level threshold value includes:

Optionally, the transceiver 701 is further configured to send cell access related system information to the terminal, where the cell access related system information includes at least one of the following:

Referring to fig. 8, the embodiment of the present invention further provides a terminal 800, which includes a processor 801, a memory 802, and a computer program stored in the memory 802 and capable of running on the processor 801, where the computer program when executed by the processor 801 implements the processes of the above-mentioned embodiment of the cell residence method executed by the terminal, and can achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.

Referring to fig. 9, an embodiment of the present invention further provides a network device 900, including a processor 901, a memory 902, and a computer program stored in the memory 902 and capable of being executed on the processor 901, where the computer program when executed by the processor 901 implements each process of the above embodiment of the information sending method executed by the network device, and the same technical effects can be achieved, and for avoiding repetition, a description is omitted herein.

The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements each process of the above embodiment of the cell residence method or the information sending method, and can achieve the same technical effect, so that repetition is avoided, and no further description is given here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims

1. A method of cell camping, comprising:

the terminal determines whether to reside in a corresponding cell;

the system information related to cell reselection includes at least one of: carrier frequency level threshold value, carrier frequency priority in cell, carrier frequency with same priority as carrier frequency in cell, third value X, and related carrier frequency level parameters in cell reselection; wherein, X is an integer greater than or equal to 1; when a terminal resides in a multi-carrier frequency cell, triggering cell reselection when the first X carrier frequencies ordered according to the carrier frequency priority are inferior to a first signal quality condition;

2. The method of claim 1, wherein,

the parameters of the cell selection related carrier frequency level include at least one of the following parameters: a minimum reception level value allowed on a target carrier frequency, a minimum reception quality value allowed on the target carrier frequency, a carrier frequency level offset value at the time of public land mobile network PLMN selection, an offset value used on the target carrier frequency at the time of radio resource control RRC connection establishment failure;

3. The method of claim 2, wherein the determining whether to camp on the corresponding cell if the terminal is not currently camping on any cell comprises:

wherein the multi-carrier cell selection criteria comprises at least one of:

4. The method of claim 3, wherein,

the cell selection reception level value Srxlev, f and the cell selection signal reception quality value square, f on the carrier frequency f are calculated according to the following formulas, respectively:

P _compensation compensating parameters for a terminal level;

5. The method of claim 1, wherein the determining whether to camp on a corresponding cell in the event that the terminal is currently camping on a first multi-carrier cell comprises at least one of:

6. The method of claim 5, wherein,

the cell reselection criteria at the frequency level are: the R value of the first multi-carrier frequency 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 meet the cell reselection criterion;

the multi-carrier cell selection criteria includes at least one of:

7. The method of claim 5 or 6, wherein,

r value R of first multi-carrier frequency cell on first carrier frequency f1 _s,f1 R value R of the second cell on a second carrier frequency f2 of the same priority as the first carrier frequency f1 _n,f2 The calculation is carried out according to the following formulas:

R _s,f1 ＝Q _meas,s,f1 +Q _Hyst,f1 -Qoffset _temp,f1

R _n,f2 ＝Q _meas,n,f2 –Q _offset,f2 -Qoffset _temp,f2

wherein Q is _meas,s,f1 Measured for the terminal at the firstThe RSRP value of a first multi-carrier cell on carrier frequency f 1;

8. The method of claim 5 or 6, wherein the carrier frequency level threshold value comprises a carrier frequency level first threshold value and a carrier frequency level second threshold value;

9. The method of claim 8, wherein the signal quality of the carrier frequency comprises:

10. The method as recited in claim 1, further comprising:

11. The method of claim 10, wherein prior to the determining whether to camp on the corresponding cell, the method further comprises:

12. An information transmission method, the method comprising:

13. The method of claim 12, wherein,

14. The method as recited in claim 12, further comprising:

15. A terminal comprising a transceiver and a processor, wherein,

16. A terminal, comprising: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the method according to any one of claims 1 to 11.

17. A network side device comprising a transceiver and a processor, wherein,

18. A network device, comprising: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor performs the steps of the method according to any one of claims 12 to 14.

19. A computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 14.