CN112437470B

CN112437470B - Cell reselection method and device

Info

Publication number: CN112437470B
Application number: CN201910791523.5A
Authority: CN
Inventors: 张晓然; 徐晓东; 胡南; 李男
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: 2019-08-26
Filing date: 2019-08-26
Publication date: 2022-07-19
Anticipated expiration: 2039-08-26
Also published as: WO2021036774A1; CN112437470A

Abstract

A method and a device for reselecting a cell are provided, and the method comprises the following steps: the terminal receives a first frequency priority and a second frequency priority of at least one frequency sent by the network equipment; and the terminal uses the first frequency priority or the second frequency priority to reselect the cell according to the cell measurement result. In the embodiment of the invention, the terminal can determine the frequency priority according to the cell measurement result, and then select the cell with high priority for cell reselection according to the determined frequency priority, so that the terminal can be controlled to reselect a more appropriate cell, more accurate cell reselection is realized, congestion at certain frequencies is avoided or reduced, and the communication efficiency of the terminal is improved.

Description

Cell reselection method and device

Technical Field

The invention relates to the technical field of mobile communication, in particular to a cell reselection method and cell reselection equipment.

Background

In the prior art, an idle terminal performs cell reselection through a frequency priority configured by a network, selects a frequency to preferentially reside, and the frequency priority configuration mode includes 2 types:

1. broadcasting a frequency priority in a system message;

2. configuring the frequency priority through a special signaling (such as RRC release message), wherein the frequency priority of the special signaling has an effective time, after the effective time, the special frequency priority is invalid, and the terminal adopts the frequency priority in the system message broadcast.

In a 5G New air interface (NR, New Radio) system, under a dual connectivity (EN-DC) architecture of a Long Term Evolution (LTE) system of a non-independent Networking (NSA) and an NR system, an LTE base station (eNB) serves as a master base station (i.e., MeNB), an NR base station (gNB) serves as a slave base station (i.e., SgNB), the eNB is connected to a 4G core network (EPC) through an S1 interface, and the gbb and the eNB may be connected through an X2 interface. Under the above framework, the terminal resides on the LTE frequency in an idle state, and after entering a connected state, the network configures an NR auxiliary node for the terminal, so that the terminal enters an EN-DC mode. Therefore, there are two idle state terminals on the LTE frequency, one is a terminal of pure LTE, and the other is a terminal of 5G EN-DC. If the network configures a certain frequency with higher priority in the system message according to the requirements of capacity, load and the like, and the operator does not deploy 5G EN-DC on the frequency, the terminal will reside on the frequency, and when making EN-DC dual connection after entering a connected state, it needs to make in-place handover to a cell supporting the NSA frequency, thereby causing extra system overhead and time delay.

For example, because TDD frequency bandwidth is large and can absorb more users, the priority of configuring TDD frequency in the original LTE network is high; however, in an EN-DC network, considering the coverage of LTE, a low-frequency FDD frequency is generally used as an LTE anchor point of EN-DC, and the FDD frequency generally has the problems of small bandwidth and limited capacity.

One possible solution is to configure the frequency priority through a dedicated signaling, and after the terminal enters a connected state, the network may know the capability information of the terminal, and then may configure the dedicated frequency priority to the terminal according to the capability information of the terminal, for example, configure the LTE frequency priority supporting EN-DC for the EN-DC terminal as a high priority.

However, the above scheme still has some problems, for example, after the terminal receives the dedicated priority indication, the dedicated priority is executed for a period of time and the priority information transmitted in the system information is ignored. If the dedicated frequency priority is configured only through the capability information of the terminal, it may be caused that, in this period of time, if the terminal moves to some areas (areas which cannot be used as EN-DC) without 5G coverage, the terminal also selects a target frequency point cell according to the dedicated priority, instead of selecting the target frequency point cell according to the priority indicated by the system message, thereby possibly causing imbalance of network load on the corresponding frequency point. Other scenarios also have similar scenarios and therefore have similar problems.

Disclosure of Invention

At least one embodiment of the present invention provides a cell reselection method and device, where a terminal may determine a frequency priority according to a cell measurement result, so that more accurate cell reselection may be implemented, frequency congestion may be avoided or reduced, and communication efficiency of the terminal may be improved.

According to an aspect of the present invention, at least one embodiment provides a cell reselection method, applied to a terminal, including:

receiving a first frequency priority and a second frequency priority of at least one frequency transmitted by a network device;

and according to the cell measurement result, performing cell reselection by using the first frequency priority or the second frequency priority.

Optionally, the step of performing cell reselection using the first frequency priority or the second frequency priority according to the cell measurement result includes:

and according to whether the cell measurement result meets a first condition and/or a second condition, performing cell reselection by using the first frequency priority or the second frequency priority.

Optionally, the step of performing cell reselection using the first frequency priority or the second frequency priority according to whether the cell measurement result satisfies a first condition and/or whether the cell measurement result satisfies a second condition includes:

when the terminal is resided in a first cell of a first network, the terminal performs cell reselection by using the first frequency priority when cell measurement results meet a first condition, otherwise performs cell reselection by using a second frequency priority, wherein the first condition comprises at least one of the following conditions:

the terminal does not measure a second cell of a second network;

and the third cell of the second network measured by the terminal does not meet the preset cell quality condition.

Optionally, the first condition further includes at least one of:

the terminal measuring to a fourth cell of the second network, but the terminal does not support dual connectivity of the first network and the second network;

the terminal measures a fifth cell of the second network, supports dual connection of the first network and the second network, and does not support dual connection frequency band combination of the first frequency of the first cell;

the terminal measures a sixth cell of the second network, supports dual connectivity of the first network and the second network, supports dual connectivity frequency band combination including the first frequency of the first cell, and does not support dual connectivity frequency band combination including the first frequency and the frequency of the sixth cell;

the terminal measures a seventh cell of the second network, supports dual connectivity of the first network and the second network, supports dual connectivity frequency band combination including the first frequency of the first cell, and does not support dual connectivity frequency band combination including the first frequency and the frequency of the seventh cell;

the terminal measures that an eighth cell of the second network meets a preset cell quality condition, but the terminal does not support dual connection of the first network and the second network;

the terminal measures that a ninth cell of the second network meets a preset cell quality condition, supports dual connection of the first network and the second network, and does not support dual-connection frequency band combination of a first frequency of the first cell;

the terminal measures that a tenth cell of the second network meets a preset cell quality condition, supports dual connection of the first network and the second network, supports dual connection frequency band combination of a first frequency of the first cell, and does not support dual connection frequency band combination of the first frequency and the frequency of the tenth cell;

the terminal measures that an eleventh cell of the second network meets a preset cell quality condition, supports dual connection of the first network and the second network, supports dual connection frequency band combination of a first frequency of the first cell, and does not support dual connection frequency band combination of the first frequency and the eleventh cell.

Optionally, before the step of performing cell reselection using the first frequency priority or the second frequency priority, the method further includes:

and receiving the frequency of at least one cell and the capability information whether the cell supports dual connection, which are sent by the network equipment.

Optionally, the first condition further includes at least one of:

the terminal measures a twelfth cell of the second network, but the first cell does not support dual connectivity of the first network and the second network;

the terminal measures a thirteenth cell of the second network, wherein the first cell supports dual connection of the first network and the second network, but the thirteenth cell does not support dual connection of the first network and the second network;

the terminal measures a fourteenth cell of a second network, the terminal supports dual connectivity of the first network and the second network, and supports a dual connectivity frequency band combination including a first frequency of the first cell, but the fourteenth cell does not support the dual connectivity frequency band combination including the first frequency and a frequency of the fourteenth cell;

the terminal measures that a fifteenth cell of a second network meets a preset cell quality condition, but the first cell does not support dual connection of a first network and the second network;

the terminal measures that a sixteenth cell of the second network meets a preset cell quality condition, wherein the first cell supports dual connection of the first network and the second network, but the sixteenth cell does not support dual connection of the first network and the second network;

the terminal measures that a seventeenth cell of the second network meets a preset cell quality condition, supports dual connection of the first network and the second network, supports dual connection frequency band combination of a first frequency of the first cell, but does not support the dual connection frequency band combination of the frequencies of the first frequency and the seventeenth cell.

when the terminal is resided in a first cell of a first network, the terminal performs cell reselection by using the second frequency priority when cell measurement results meet a second condition, otherwise, performs cell reselection by using the first frequency priority, wherein the second condition comprises at least one of the following conditions:

the terminal measures an eighteenth cell of the second network;

and the nineteenth cell of the second network measured by the terminal meets the preset cell quality condition.

Optionally, the second condition further includes at least one of:

the terminal measures a twentieth cell of the second network, and the terminal supports dual connection of the first network and the second network;

the terminal measures a twenty-first cell of a second network, supports dual connectivity of the first network and the second network, and supports a dual connectivity frequency band combination including a first frequency of the first cell;

the terminal measuring a twenty-second cell of the second network, the terminal supporting dual connectivity of the first network and the second network and supporting dual connectivity frequency band combination including the first frequency and a frequency of the twenty-second cell;

the twenty-third cell of the second network measured by the terminal meets the preset cell quality condition, and the terminal supports dual connection of the first network and the second network;

the twenty-fourth cell of the second network measured by the terminal meets the preset cell quality condition, the terminal supports the dual connection of the first network and the second network and supports the dual connection frequency band combination of the first frequency of the first cell;

the twenty-fifth cell of the second network measured by the terminal meets the preset cell quality condition, the terminal supports double connection of the first network and the second network, and the terminal supports double-connection frequency band combination of the first frequency and the frequency of the twenty-fifth cell.

Optionally, the second condition further includes at least one of:

the terminal measures a twenty-sixth cell of a second network, wherein the first cell supports dual connection of a first network and the second network;

the terminal measures a twenty-seventh cell of a second network, wherein the first cell supports dual connection of the first network and the second network, and the twentieth cell supports dual connection of the first network and the second network;

the twenty-eighth cell of the second network measured by the terminal meets the preset cell quality condition, and the first cell supports the dual connection of the first network and the second network;

the twenty-ninth cell of the second network measured by the terminal meets a preset cell quality condition, the first cell supports dual connection of the first network and the second network, and the twenty-ninth cell supports dual connection of the first network and the second network.

Optionally, the step of receiving a first frequency priority and a second frequency priority of at least one frequency sent by the network device includes:

receiving the first frequency priority sent by the network equipment through a broadcast message; and the number of the first and second groups,

receiving the second frequency priority sent by the network equipment through a broadcast message or dedicated signaling.

Optionally, the cell in the second network measured by the terminal is a cell in a preset second network cell list, or a cell in a second network cell list sent by the network device.

Optionally, the preset cell quality condition includes at least one of the following:

a cell quality condition defined in a preset cell selection criterion;

the RSRP of the cell meets a preset threshold, and the preset threshold adopts a preset configured numerical value or a numerical value issued by network equipment.

According to another aspect of the present invention, at least one embodiment provides a terminal including:

the information receiving module is used for receiving a first frequency priority and a second frequency priority of at least one frequency sent by the network equipment;

and the cell reselection module is used for performing cell reselection by using the first frequency priority or the second frequency priority according to the cell measurement result.

Optionally, the cell reselection module is further configured to reselect the cell by using the first frequency priority or the second frequency priority according to whether the cell measurement result satisfies a first condition and/or whether the cell measurement result satisfies a second condition.

Optionally, the cell reselection module is further configured to, when the terminal is camped on a first cell of a first network, use the first frequency priority for cell reselection when a cell measurement result satisfies a first condition, otherwise use a second frequency priority for cell reselection, where the first condition includes at least one of:

the terminal does not measure a second cell of a second network;

Optionally, the first condition further includes at least one of:

Optionally, the information receiving module is further configured to receive the frequency of at least one cell and capability information of whether the cell supports dual connectivity, where the frequency is sent by the network device.

Optionally, the first condition further includes at least one of:

the terminal measures a fourteenth cell of a second network, the terminal supports dual connectivity of the first network and the second network, and supports dual connectivity frequency band combination including a first frequency of the first cell, but the fourteenth cell does not support dual connectivity frequency band combination including the first frequency and a frequency of the fourteenth cell;

the terminal measures that a fifteenth cell of a second network meets a preset cell quality condition, but the first cell does not support double connection of a first network and the second network;

Optionally, the cell reselection module is further configured to, when the terminal is camped in a first cell of a first network, perform cell reselection using the second frequency priority when a cell measurement result satisfies a second condition, otherwise perform cell reselection using the first frequency priority, where the second condition includes at least one of:

the terminal measures an eighteenth cell of the second network;

Optionally, the second condition further includes at least one of:

the terminal measures a twenty-second cell of the second network, supports dual connectivity of the first network and the second network, and supports dual connectivity frequency band combination including the first frequency and the frequency of the twenty-second cell;

the twenty-fourth cell of the second network measured by the terminal meets the preset cell quality condition, the terminal supports dual connection of the first network and the second network, and supports dual connection frequency band combination of the first frequency of the first cell;

Optionally, the second condition further includes at least one of:

Optionally, the information receiving module is further configured to receive the first frequency priority sent by the network device through a broadcast message; and receiving the second frequency priority transmitted by the network equipment through a broadcast message or dedicated signaling.

a cell quality condition defined in a preset cell selection criterion;

In accordance with yet another aspect of the present invention, at least one embodiment provides a terminal comprising a transceiver and a processor, wherein,

the transceiver is used for receiving a first frequency priority and a second frequency priority of at least one frequency transmitted by the network equipment;

and the processor is used for performing cell reselection by using the first frequency priority or the second frequency priority according to the cell measurement result.

Optionally, the processor is further configured to perform cell reselection using the first frequency priority or the second frequency priority according to whether the cell measurement result satisfies a first condition and/or whether the cell measurement result satisfies a second condition.

Optionally, the processor is further configured to, when the terminal is camped on a first cell of a first network, the terminal performs cell reselection using the first frequency priority when a cell measurement result satisfies a first condition, otherwise performs cell reselection using a second frequency priority, where the first condition includes at least one of:

the terminal does not measure a second cell of a second network;

Optionally, the first condition further includes at least one of:

the terminal measures a seventh cell of the second network, supports dual connectivity of the first network and the second network, and supports a dual connectivity frequency band combination including a first frequency of the first cell, but does not support the dual connectivity frequency band combination including the first frequency and a frequency of the seventh cell;

Optionally, the transceiver is further configured to receive, from the network device, frequency of at least one cell and capability information of whether the cell supports dual connectivity.

Optionally, the first condition further includes at least one of:

the terminal measures that a seventeenth cell of the second network meets a preset cell quality condition, supports dual connection of the first network and the second network, supports dual connection frequency band combination of a first frequency of the first cell, but does not support dual connection frequency band combination of the frequencies of the first frequency and the seventeenth cell.

Optionally, the processor is further configured to, when the terminal is camped on a first cell of a first network, perform cell reselection using the second frequency priority when a cell measurement result satisfies a second condition, otherwise perform cell reselection using the first frequency priority, where the second condition includes at least one of:

the terminal measures an eighteenth cell of the second network;

Optionally, the second condition further includes at least one of:

the twenty-eighth cell of the second network measured by the terminal meets the preset cell quality condition, and the first cell supports dual connection of the first network and the second network;

Optionally, the transceiver is further configured to receive the first frequency priority sent by the network device through a broadcast message; and receiving the second frequency priority sent by the network equipment through a broadcast message or dedicated signaling.

a cell quality condition defined in a preset cell selection criterion;

According to yet another aspect of the present invention, at least one embodiment provides a terminal including: a processor, a memory and a program stored on the memory and executable on the processor, which program, when executed by the processor, performs the steps of the cell reselection method as described above.

According to another aspect of the invention, at least one embodiment provides a computer readable storage medium having a program stored thereon, which when executed by a processor, performs the steps of the method as described above.

Compared with the prior art, the cell reselection method and the cell reselection equipment provided by the embodiment of the invention have the advantages that the terminal can determine the frequency priority according to the cell measurement result, and then select the cell with high priority according to the determined frequency priority for cell reselection, so that the terminal can be controlled to reselect a more appropriate cell, more accurate cell reselection is realized, congestion at certain frequencies is avoided or reduced, and the communication efficiency of the terminal is improved.

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 refer to like parts throughout the drawings. In the drawings:

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

fig. 2 is a flowchart of a cell reselection method according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 4 is another schematic structural diagram of a terminal according to an 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 invention are shown in the drawings, it should be understood that the invention can 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 of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or described herein. 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. In the description and in the claims "and/or" means at least one of the connected objects.

The techniques described herein are not limited to NR systems and Long Time Evolution (LTE)/LTE Evolution (LTE-a) systems, and may also be used for 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 may implement Radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.21(Wi-Fi), IEEE802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of the 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-A, and GSM are described in documents from an organization named "third Generation Partnership Project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes the 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 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), where the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and the specific type of the terminal 11 is not limited in the embodiment of the present invention. The network device 12 may be a Base Station and/or a core network element, wherein 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 other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), wherein the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an 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, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, it should be noted that, in the embodiment of the present invention only takes the Base Station in the NR system as an example, but does not limit the specific type of base station.

The base stations may communicate with the terminals 11 under the control of a base station controller, which may be part of the core network or some of the base stations in various examples. Some base stations may communicate control information or user data with the core network through a backhaul. In some examples, some of the base stations may communicate with each other, directly or indirectly, over backhaul links, which may be wired or wireless communication links. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multi-carrier transmitter can transmit modulated signals on the 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, 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 coverage area. The coverage area of an access point may be divided into sectors that form only a portion of the coverage area. A wireless communication system may include base stations of different types (e.g., macro, micro, or pico base stations). The base stations 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 base stations of the same or different types, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks) may overlap.

The communication links in a wireless communication system may comprise 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). The UL transmission may also be referred to as reverse link transmission, while the DL transmission may also be referred to as forward link transmission. Downlink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both.

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

and step 21, receiving a first frequency priority and a second frequency priority of at least one frequency transmitted by the network equipment.

Here, the at least one frequency may be one or more frequencies, and in this embodiment of the present invention, the network device configures two different frequency priorities for the at least one frequency, that is, a first frequency priority and a second frequency priority. The priority of each of the at least one frequency is assigned in the first frequency priority, and likewise, the priority of each of the at least one frequency is assigned in the second frequency priority, it being noted that there is at least one or more frequencies having different priorities in the first and second frequency priorities.

For example, suppose that the larger the value of the frequency priority, the higher the priority, there are two frequencies in total, i.e. frequencies F1 and F2, wherein the priority of frequencies F1 and F2 in the first frequency priority is 1 and 2, respectively, and the priority of frequencies F1 in the second frequency priority is 2 and 1, respectively, that is, the priority of frequency F1 in the first frequency priority is lower than the priority of frequency F2; in the second frequency priority, the frequency F1 has a higher priority than the frequency F2.

Specifically, in step 21, the terminal may receive the first frequency priority sent by the network device through the first broadcast message; and receiving the second frequency priority sent by the network equipment through a second broadcast message or dedicated signaling. Here, the first broadcast message may be the same as the second broadcast message, or may be different from the second broadcast message, which is not specifically limited in this embodiment of the present invention. The broadcast message may be various system messages, the dedicated signaling may be Radio Resource Control (RRC) signaling, and the network device may specifically be a base station or other access devices, such as a transmitting/receiving point TRP.

And step 22, performing cell reselection by using the first frequency priority or the second frequency priority according to the cell measurement result.

Here, the terminal may perform cell reselection using the first frequency priority or the second frequency priority according to whether the cell measurement result satisfies a first condition and/or a second condition. The cell measurement result may include a measurement result of a first cell in a first network where the terminal resides, and may also include a measurement result of a neighboring cell of the first cell, where the neighboring cell may be a cell of the same network (i.e., the first network) or a cell of a different network (e.g., a second network), and the first network and the second network may be radio access technology (RTA) based networks, such as an LTE network for the first network and a 5G NR network for the second network; the first network and the second network may also be networks deployed for different application scenarios, such as a second network deployed around a high-speed rail and suitable for fast-moving terminals, and a first network deployed for terminals with normal moving speed, in which case, the first network and the second network may be based on the same or different RATs.

Through the steps, the terminal of the embodiment of the invention can determine the frequency priority according to the cell measurement result, and then select the cell with high priority according to the determined frequency priority for cell reselection, so that the terminal can be controlled to reselect a more appropriate cell, more accurate cell reselection is realized, congestion at certain frequencies is avoided or reduced, and the communication efficiency of the terminal is improved.

The first condition and the second condition are explained below.

In the above step 22, when the terminal is camped on a first cell of a first network, the terminal performs cell reselection using the first frequency priority when the cell measurement result satisfies a first condition, and otherwise performs cell reselection using a second frequency priority, where the first condition includes one or more of the following conditions:

1) the terminal does not measure a second cell of a second network.

2) And the third cell of the second network measured by the terminal does not meet the preset cell quality condition.

In the embodiment of the present invention, the first, second, and nth cells all refer to any cell in the corresponding network, and do not refer to a specific cell.

Considering the capability information of the terminal, when performing cell reselection, it may be further determined whether to perform cell reselection with a first frequency priority according to the capability information of the terminal, where whether dual connectivity is supported, whether a certain dual connectivity frequency band combination is supported, and the like, and at this time, in step 22, the cell reselection may be performed with the first frequency priority or a second frequency priority according to whether a cell measurement result and the terminal capability information satisfy a first condition, and at this time, the first condition may further include at least one of the following situations:

3) the terminal measures a fourth cell of the second network, but the terminal does not support dual connectivity for the first network and the second network.

4) The terminal measures a fifth cell of the second network, the terminal supports dual connectivity of the first network and the second network, but does not support dual connectivity band combining including the first frequency of the first cell.

5) The terminal measures a sixth cell of the second network, supports dual connectivity of the first network and the second network, and supports a dual connectivity frequency band combination including a first frequency of the first cell, but does not support the dual connectivity frequency band combination including the first frequency and a frequency of the sixth cell.

6) The terminal measures a seventh cell of the second network, supports dual connectivity of the first network and the second network, and supports a dual connectivity frequency band combination including the first frequency of the first cell, but does not support the dual connectivity frequency band combination including the first frequency and the frequency of the seventh cell.

7) The terminal measures that the eighth cell of the second network meets the preset cell quality condition, but the terminal does not support dual connection of the first network and the second network.

8) The terminal measures that a ninth cell of the second network meets a preset cell quality condition, supports double connection of the first network and the second network, and does not support double connection frequency band combination including the first frequency of the first cell.

9) The terminal measures that a tenth cell of the second network meets a preset cell quality condition, supports dual connection of the first network and the second network, supports dual connection frequency band combination of the first frequency of the first cell, and does not support dual connection frequency band combination of the first frequency and the frequency of the tenth cell.

10) The terminal measures that an eleventh cell of the second network meets a preset cell quality condition, supports dual connection of the first network and the second network, supports dual connection frequency band combination of a first frequency of the first cell, and does not support dual connection frequency band combination of the first frequency and the eleventh cell.

It can be seen that the first condition of the embodiment of the present invention may be any one or more of the above cases 1 to 10, and when the first condition includes the above cases, it is required to ensure that there is no subset relationship between the cases, i.e. there is no case of one of the cases, belonging to a subset of another case of the cases.

In addition to the terminal capability, the network/cell may also support or not support dual connectivity, and support or not support a certain dual connectivity frequency band combination, and so on, so in step 22, at this time, in step 22, according to whether the cell measurement result, the terminal capability information, and the cell capability information satisfy a first condition, the first frequency priority or the second frequency priority may be used for cell reselection, at this time, the first condition may further include at least one of the following situations:

11) the terminal measures a twelfth cell of the second network, but the first cell does not support dual connectivity for the first network and the second network.

12) The terminal measures a thirteenth cell of the second network, the first cell supporting dual connectivity of the first network and the second network, but the thirteenth cell not supporting dual connectivity of the first network and the second network.

13) The terminal measures a fourteenth cell of the second network, the terminal supports dual connectivity of the first network and the second network, and supports a dual connectivity frequency band combination including a first frequency of the first cell, but the fourteenth cell does not support the dual connectivity frequency band combination including the first frequency and a frequency of the fourteenth cell.

14) The terminal measures that a fifteenth cell of the second network meets a preset cell quality condition, but the first cell does not support dual connection of the first network and the second network.

15) The terminal measures that a sixteenth cell of the second network meets a preset cell quality condition, the first cell supports dual connection of the first network and the second network, but the sixteenth cell does not support dual connection of the first network and the second network.

16) The terminal measures that a seventeenth cell of the second network meets a preset cell quality condition, supports dual connection of the first network and the second network, supports dual connection frequency band combination of a first frequency of the first cell, but does not support the dual connection frequency band combination of the frequencies of the first frequency and the seventeenth cell.

According to at least one embodiment of the invention, the first condition of the embodiment of the invention may be any one or more of the above cases 1 to 16, and when the first condition includes the above cases, it needs to be ensured that there is no subset relationship between the cases, that is, there is no case of one of the cases, and the case belongs to a subset of another case of the cases.

Similarly, when the second condition is adopted for judgment:

when the terminal is resided in a first cell of a first network, the terminal uses the second frequency priority for cell reselection when cell measurement results satisfy a second condition, otherwise, uses the first frequency priority for cell reselection, wherein the second condition comprises at least one of the following conditions:

A) the terminal measures an eighteenth cell of the second network;

B) and the nineteenth cell of the second network measured by the terminal meets the preset cell quality condition.

Considering the capability information of the terminal, when performing cell reselection, it may be further determined whether to perform cell reselection with the second frequency priority according to the capability information of the terminal, such as whether dual connectivity is supported, whether a certain dual connectivity frequency band combination is supported, and the like, in this case, in step 22, the cell reselection may be performed with the second frequency priority or the first frequency priority according to whether a cell measurement result and the terminal capability information satisfy a second condition, and in this case, the second condition may further include at least one of the following cases:

C) the terminal measures a twentieth cell of the second network, and the terminal supports dual connection of the first network and the second network;

D) the terminal measures a twenty-first cell of a second network, supports dual connectivity of the first network and the second network, and supports a dual connectivity frequency band combination including a first frequency of the first cell;

E) the terminal measures a twenty-second cell of the second network, supports dual connectivity of the first network and the second network, and supports dual connectivity frequency band combination including the first frequency and the frequency of the twenty-second cell;

F) the twenty-third cell of the second network measured by the terminal meets the preset cell quality condition, and the terminal supports the dual connection of the first network and the second network;

G) the twenty-fourth cell of the second network measured by the terminal meets the preset cell quality condition, the terminal supports dual connection of the first network and the second network, and supports dual connection frequency band combination of the first frequency of the first cell;

H) the twenty-fifth cell of the second network measured by the terminal meets the preset cell quality condition, the terminal supports dual connection of the first network and the second network, and the terminal supports dual-connection frequency band combination of the first frequency and the frequency of the twenty-fifth cell.

It can be seen that the second condition of the embodiment of the present invention may be any one or more of the above cases a to H, and when the first condition includes the above cases, it is required to ensure that there is no subset relationship between the cases, that is, there is no case in one of the cases, and belongs to a subset of another case in the cases.

In addition to the terminal capability, the network/cell may also support or not support dual connectivity, and support or not support a certain dual connectivity frequency band combination, and so on, so in step 22, at this time, in step 22, according to whether the cell measurement result, the terminal capability information, and the cell capability information satisfy a second condition, the second frequency priority or the first frequency priority may be used for cell reselection, at this time, the second condition may further include at least one of the following situations:

H) the terminal measures a twenty-sixth cell of the second network, the first cell supporting dual connectivity for the first network and the second network.

I) The terminal measures a twenty-seventh cell of the second network, the first cell supporting dual connectivity of the first network and the second network, and the twentieth cell supporting dual connectivity of the first network and the second network.

J) And the twenty-eighth cell of the second network measured by the terminal meets the preset cell quality condition, and the first cell supports the dual connection of the first network and the second network.

K) The twenty-ninth cell of the second network measured by the terminal meets a preset cell quality condition, the first cell supports dual connection of the first network and the second network, and the twenty-ninth cell supports dual connection of the first network and the second network.

According to at least one embodiment of the invention, the second condition of the embodiment of the invention may be any one or more of the above cases a to K, and when the second condition includes the above cases, it is required to ensure that there is no subset relationship between the cases, that is, there is no case of one of the cases, and belongs to a subset of another case of the cases.

In addition, according to at least one embodiment of the present invention, in order to obtain the capability information of the cell, before step 22, the terminal may further receive the frequency of at least one cell and the capability information of whether the cell supports dual connectivity, which are sent by the network device. The dual connectivity capability information may indicate whether the cell supports dual connectivity of the first network and the second network, dual connectivity frequency band combinations supported when dual connectivity is supported, and the like.

In addition, according to at least one embodiment of the present invention, in step 22, the cell in the second network measured by the terminal may be a cell in a preset second network cell list, or a cell in a second network cell list sent by the network device.

Further, in accordance with at least one embodiment of the invention, the preset cell quality condition includes at least one of:

a cell quality condition defined in a preset cell selection criterion;

the Reference Signal Received Power (RSRP) of the cell meets a preset threshold, and the preset threshold adopts a preset configured numerical value or a numerical value issued by network equipment.

Specifically, the cell selection criteria may include the following criteria (which are merely exemplary and are not intended to limit the present invention):

i. measured cell RSRP-minimum required RSRP-preset offset or offset for cell reselection >0, and,

measured cell RSRQ-RSRQ minimum required for cell reselection-preset offset or offset > 0.

The cell reselection method according to the embodiment of the present invention is described above, and is further described below by using several specific examples.

The first example is as follows:

and S11, the network sends the frequency priority.

a) The network sends the first frequency priority via a broadcast message, wherein: the frequency priority of frequency f1 is 2, and the frequency priority of frequency f2 is 1. It is assumed that the larger the value of the frequency priority, the higher the priority thereof.

b) The network sends the second frequency priority via dedicated signaling, wherein: the frequency priority of frequency f1 is 1, and the frequency priority of frequency f2 is 2

And S12, the terminal receives the frequency priority sent by the network.

a) If the terminal measures the NR cell, the second frequency priority transmitted in the dedicated signaling, that is, the priority of f2 is high, the priority of f1 is low, and the cell reselection is performed according to the second frequency priority.

b) And if the terminal does not measure the NR frequency point, continuing to adopt the first frequency priority sent by the broadcast message, namely the priority of f1 is high, the priority of f2 is low, and reselecting the cell according to the first frequency priority.

Example two:

and S21, the network sends the frequency priority.

a) The network sends the first frequency priority via a broadcast message, wherein: the frequency priority of the frequency f1 of LTE is 3, the frequency priority of the frequency f2 of LTE is 2, the frequency priority of the frequency f3 of NR is 1, and the frequency priority of the frequency f4 of NR is 0. It is assumed that the larger the numerical value of the frequency priority, the higher the priority thereof.

b) The network sends the second frequency priority through dedicated signaling: the LTE f1 frequency priority is 2, the LTE f2 frequency priority is 3, the NR f3 frequency priority is 1, and the NR f4 frequency priority is 0.

S22, the simultaneous network transmission of LTE f2 and LTE f3 supports NSA deployment.

And S23, the terminal receives the frequency priority.

a) If the terminal measures the NR frequency points f3 and f4, the second frequency priority sent in the dedicated signaling is used, namely the priority of f2 is high, the priority of f1 is low, and the cell reselection is carried out according to the second frequency priority

b) If the terminal measures an NR frequency point f3, the terminal uses the second frequency priority sent in the dedicated signaling, namely, the priority of f2 is high, the priority of f1 is low, and cell reselection is performed according to the second frequency priority

c) And if the terminal measures an NR frequency point f4 or does not measure the NR frequency point, performing cell reselection according to the first frequency priority by using the first frequency priority sent by the broadcast message, namely the priority of f1 is high and the priority of f2 is low.

It can be seen that, in the above example, the terminal may implement more appropriate cell reselection based on the cell measurement result, and reselect to a more appropriate cell, which may avoid or reduce congestion occurring at some frequencies, and improve the communication efficiency of the terminal.

Based on the method, the embodiment of the invention also provides equipment for implementing the method.

Referring to fig. 3, an embodiment of the present invention provides a terminal 30, including:

an information receiving module 31, configured to receive a first frequency priority and a second frequency priority of at least one frequency sent by a network device;

and a cell reselection module 32, configured to perform cell reselection using the first frequency priority or the second frequency priority according to a cell measurement result.

Optionally, the cell reselection module 32 is further configured to perform cell reselection by using the first frequency priority or the second frequency priority according to whether the cell measurement result satisfies a first condition and/or whether the cell measurement result satisfies a second condition.

Optionally, the cell reselection module 32 is further configured to, when the terminal is camped in a first cell of a first network, perform cell reselection using the first frequency priority if a cell measurement result satisfies a first condition, and otherwise perform cell reselection using a second frequency priority, where the first condition includes at least one of:

the terminal does not measure a second cell of a second network;

Optionally, the first condition further includes at least one of:

the terminal measures that a ninth cell of the second network meets a preset cell quality condition, supports double connection of the first network and the second network, but does not support double connection frequency band combination of a first frequency of the first cell;

Optionally, the first condition further includes at least one of:

the terminal measures that a sixteenth cell of the second network meets a preset cell quality condition, wherein the first cell supports dual connection of a first network and the second network, but the sixteenth cell does not support dual connection of the first network and the second network;

Optionally, the cell reselection module 32 is further configured to, when the terminal is camped in a first cell of a first network, perform cell reselection using the second frequency priority if a cell measurement result satisfies a second condition, and otherwise perform cell reselection using the first frequency priority, where the second condition includes at least one of:

the terminal measures an eighteenth cell of the second network;

Optionally, the second condition further includes at least one of:

Optionally, the information receiving module is further configured to receive, from the network device, the frequency of at least one cell and capability information of whether the cell supports dual connectivity.

Optionally, the second condition further includes at least one of:

a cell quality condition defined in a preset cell selection criterion;

Referring to fig. 4, another structure of a terminal according to an embodiment of the present invention is shown, where the terminal 400 includes: a processor 401, a transceiver 402, a memory 403, a user interface 404, and a bus interface, wherein:

in the embodiment of the present invention, the terminal 400 further includes: a program stored in the memory 403 and executable on the processor 401, the program when executed by the processor 401 implementing the steps of:

In FIG. 4, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 401, and various circuits, represented by memory 403, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 402 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 404 may also be an interface capable of interfacing externally to a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 401 is responsible for managing the bus architecture and general processing, and the memory 403 may store data used by the processor 401 in performing operations.

Optionally, the program may further implement the following steps when being executed by the processor 403:

Optionally, when executed by the processor 403, the program may further implement the following steps:

when the terminal is resided in a first cell of a first network, if a cell measurement result meets a first condition, performing cell reselection by using the first frequency priority, otherwise, performing cell reselection by using a second frequency priority, wherein the first condition includes at least one of the following:

the terminal does not measure a second cell of a second network;

Optionally, the first condition further includes at least one of:

the terminal measures that an eighth cell of the second network meets a preset cell quality condition, but the terminal does not support double connection of the first network and the second network;

the terminal measures that a tenth cell of the second network meets a preset cell quality condition, supports the dual connection of the first network and the second network, supports the dual connection frequency band combination of the first frequency of the first cell, and does not support the dual connection frequency band combination of the first frequency and the frequency of the tenth cell;

Optionally, the first condition further includes at least one of:

when the terminal is camped on a first cell of a first network, if the cell measurement result meets a second condition, using the second frequency priority to perform cell reselection, otherwise, using the first frequency priority to perform cell reselection, wherein the second condition includes at least one of the following conditions:

the terminal measures an eighteenth cell of the second network;

Optionally, the second condition further includes at least one of:

the terminal measures a twentieth cell of the second network, and the terminal supports dual connectivity of the first network and the second network;

the twenty-third cell of the second network measured by the terminal meets the preset cell quality condition, and the terminal supports the dual connection of the first network and the second network;

the twenty-fifth cell of the second network measured by the terminal meets the preset cell quality condition, the terminal supports dual connection of the first network and the second network, and the terminal supports dual-connection frequency band combination of the first frequency and the frequency of the twenty-fifth cell.

Optionally, the second condition further includes at least one of:

receiving the first frequency priority sent by the network equipment through a broadcast message; and receiving the second frequency priority sent by the network equipment through a broadcast message or dedicated signaling.

a cell quality condition defined in a preset cell selection criterion;

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the cell reselection method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A cell reselection method is applied to a terminal, and is characterized by comprising the following steps:

according to the cell measurement result, performing cell reselection by using the first frequency priority or the second frequency priority;

wherein, the step of performing cell reselection using the first frequency priority or the second frequency priority according to the cell measurement result comprises: according to whether the cell measurement result meets a first condition and/or a second condition, carrying out cell reselection by using the first frequency priority or the second frequency priority;

the step of performing cell reselection by using the first frequency priority or the second frequency priority according to whether the cell measurement result satisfies a first condition and/or a second condition, includes:

when the terminal is resided in a first cell of a first network, the terminal uses the first frequency priority for cell reselection when cell measurement results meet a first condition, otherwise, uses a second frequency priority for cell reselection, wherein the first condition comprises at least one of the following:

the terminal does not measure a second cell of a second network;

2. The method of claim 1, wherein the first condition further comprises at least one of:

3. The method of claim 2, wherein prior to the step of using the first frequency priority or the second frequency priority for cell reselection, the method further comprises:

4. The method of claim 3, wherein the first condition further comprises at least one of:

5. The method of claim 1, wherein the step of using the first frequency priority or the second frequency priority for cell reselection based on whether cell measurement results satisfy a first condition and/or whether a second condition is satisfied, further comprises:

when the terminal is resided in a first cell of a first network, the terminal uses the second frequency priority for cell reselection when cell measurement results meet a second condition, otherwise, the terminal uses the first frequency priority for cell reselection, wherein the second condition comprises at least one of the following conditions:

the terminal measures an eighteenth cell of the second network;

6. The method of claim 5, wherein the second condition further comprises at least one of:

7. The method of claim 6, wherein prior to the step of using the first frequency priority or the second frequency priority for cell reselection, the method further comprises:

8. The method of claim 7, wherein the second condition further comprises at least one of:

9. The method of any of claims 1 to 8, wherein the step of receiving a first frequency priority and a second frequency priority of at least one frequency transmitted by a network device comprises:

10. The method of any one of claims 1 to 8,

the cell in the second network measured by the terminal is a cell in a preset second network cell list or a cell in a second network cell list sent by the network device.

11. The method according to any of claims 1 to 8, wherein the preset cell quality condition comprises at least one of:

a cell quality condition defined in a preset cell selection criterion;

12. A terminal, comprising:

a cell reselection module, configured to perform cell reselection using the first frequency priority or the second frequency priority according to a cell measurement result;

the cell reselection module is further configured to perform cell reselection using the first frequency priority or the second frequency priority according to whether a cell measurement result satisfies a first condition and/or whether a cell measurement result satisfies a second condition;

the cell reselection module is further configured to, when the terminal is camped on a first cell of a first network, perform cell reselection using the first frequency priority when a cell measurement result satisfies a first condition, otherwise perform cell reselection using a second frequency priority, where the first condition includes at least one of:

the terminal does not measure a second cell of a second network;

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

the processor is configured to perform cell reselection using the first frequency priority or the second frequency priority according to a cell measurement result;

the processor is further configured to perform cell reselection using the first frequency priority or the second frequency priority according to whether a cell measurement result satisfies a first condition and/or a second condition;

the processor is further configured to, when the terminal is camped on a first cell of a first network, perform cell reselection using the first frequency priority when a cell measurement result satisfies a first condition, and otherwise perform cell reselection using a second frequency priority, where the first condition includes at least one of:

the terminal does not measure a second cell of a second network;

14. A terminal, comprising: a processor, a memory and a program stored on the memory and executable on the processor, which program, when executed by the processor, carries out the steps of the cell reselection method according to any of claims 1 to 11.

15. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the cell reselection method according to one of claims 1 to 11.