CN111615160A

CN111615160A - Cell reselection method and terminal equipment

Info

Publication number: CN111615160A
Application number: CN201910544655.8A
Authority: CN
Inventors: 岳然; 杨晓东
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-09-01

Abstract

The embodiment of the invention provides a cell reselection method, terminal equipment and network equipment, relates to the technical field of communication, and aims to solve the problem that the terminal equipment supporting an NB-IoT wireless access technology cannot reselect cells supporting other wireless access technologies. The method comprises the following steps: reselecting the target cell according to the reselection information and the target reselection rule; wherein the reselection information is used to indicate M first frequencies, the M first frequencies include a frequency supporting a first access technology and a frequency supporting a second access technology, and the frequency of the target cell is one of the M first frequencies; the first access technology is a narrowband Internet of things access technology, the second access technology is an access technology different from the first receiving technology, and M is a positive integer.

Description

Cell reselection method and terminal equipment

Technical Field

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

Background

With the development of terminal technology, more and more wireless networks can be used by terminal equipment. For example, a terminal device may reside in a cell of a narrowband Internet of Things (NB-IoT).

However, the neighbor cells at the terminal device include: under the condition of a cell supporting an NB-IoT wireless access technology and cells supporting other wireless access technologies, if a terminal device needs to be switched from a current resident cell to another resident cell, the terminal device supporting the NB-IoT wireless access technology performs cell reselection only according to system broadcast information of a narrowband Internet of things, so that the terminal device supporting the NB-IoT wireless access technology cannot reselect the cell supporting other wireless access technologies.

Disclosure of Invention

The embodiment of the invention provides a cell reselection method, terminal equipment and network equipment, and aims to solve the problem that the terminal equipment supporting an NB-IoT wireless access technology cannot reselect cells supporting other wireless access technologies.

In order to solve the above technical problem, the embodiment of the present invention is implemented as follows:

in a first aspect, an embodiment of the present invention provides a cell reselection method, which is applied to a terminal device, and the method includes: reselecting the target cell according to the reselection information and the target reselection rule;

wherein the reselection information is used to indicate M first frequencies, the M first frequencies include a frequency supporting a first access technology and a frequency supporting a second access technology, and the frequency of the target cell is one of the M first frequencies;

the first access technology is a narrowband Internet of things access technology, the second access technology is an access technology different from the first access technology, and M is a positive integer.

In a second aspect, an embodiment of the present invention further provides a cell reselection method, which is applied to a network device, and the method includes: sending reselection information to the terminal equipment;

wherein, the reselection information is used for indicating the terminal equipment to reselect the cell; the reselection information is used for indicating M first frequencies, wherein the M first frequencies comprise frequencies supporting a first access technology and/or frequencies supporting a second access technology; in the case that the M first frequencies are frequencies supporting the first access technology, the M first frequencies are determined according to a cell reselection manner; the first access technology is a narrowband Internet of things access technology, the second access technology is an access technology different from the first access technology, and M is a positive integer.

In a third aspect, an embodiment of the present invention provides a terminal device, where the terminal device includes: a reselection module;

the reselection module is used for reselecting the target cell according to reselection information and a target reselection rule;

wherein the reselection information indicates M first frequencies, the M first frequencies include a frequency supporting a first access technology and a frequency supporting a second access technology, and the frequency of the target cell is one of the M first frequencies;

In a fourth aspect, an embodiment of the present invention provides a network device, where the network device includes: a sending module;

the sending module is used for sending reselection information to the terminal equipment;

wherein, the reselection information is used for indicating the terminal equipment to reselect the cell; the reselection information is used for indicating M first frequencies, wherein the M first frequencies comprise frequencies supporting a first access technology and/or frequencies supporting a second access technology; when the M first frequencies are frequencies supporting a first access technology, the M first frequencies are determined according to a cell reselection mode; the first access technology is a narrowband Internet of things access technology, the second access technology is an access technology different from the first access technology, and M is a positive integer.

In a fifth aspect, an embodiment of the present invention provides a terminal device, which includes a processor, a memory, and a computer program stored in the memory and operable on the processor, and when the computer program is executed by the processor, the steps of the cell reselection method according to the first aspect are implemented.

In a sixth aspect, an embodiment of the present invention provides a network device, which includes a processor, a memory, and a computer program stored in the memory and operable on the processor, and when executed by the processor, the computer program implements the steps of the cell reselection method according to the second aspect.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the cell reselection method according to the first aspect or the second aspect.

In the embodiment of the invention, the terminal equipment reselects the target cell according to the reselection information and the target reselection rule. Since the reselection information indicates that the M first frequencies include a frequency supporting a first access technology and a frequency supporting a second access technology, the M first frequencies may be a resident cell of the terminal device and a neighboring cell of the resident cell; the target frequency meeting the reselection criterion may be a frequency supporting the first access technology or a frequency supporting the second access technology, and therefore, the terminal device may reselect to a cell corresponding to the frequency supporting the first access technology or a cell corresponding to the frequency supporting the second access technology in the reselection process, that is, in a case that the terminal device supports the NB-IoT access technology and other access technologies, the terminal device may reselect not only to a cell supporting the NB-IoT access technology but also to cells supporting other access technologies.

Drawings

Fig. 1 is a schematic diagram of a network system architecture according to an embodiment of the present invention;

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

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

fig. 4 is a schematic structural diagram of another possible terminal device provided in the embodiment of the present invention;

fig. 5 is a schematic diagram of a possible structure of a network device according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a hardware structure of a terminal device according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a hardware structure of a network device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that "/" in this context means "or", for example, A/B may mean A or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. "plurality" means two or more than two.

The terms "first" and "second," and the like, in the description and in the claims of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first access technology and the second access technology, etc. are used to distinguish between different access technologies, rather than to describe a particular order of access technologies.

It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the current cell reselection mode, the terminal device supporting the NB-IoT access technology performs cell reselection only according to the system broadcast information of the narrowband internet of things, so that the terminal device supporting the NB-IoT access technology cannot reselect to a cell supporting other wireless access technologies.

In order to solve the above problem, according to the cell reselection method provided in the embodiment of the present invention, the terminal device reselects to the target cell according to the reselection information and the target reselection rule. Since the reselection information indicates that the M first frequencies include a frequency supporting a first access technology and a frequency supporting a second access technology, the M first frequencies may be a resident cell of the terminal device and a neighboring cell of the resident cell; the target frequency meeting the reselection criterion may be a frequency supporting the first access technology or a frequency supporting the second access technology, and therefore, the terminal device may reselect to a cell corresponding to the frequency supporting the first access technology or a cell corresponding to the frequency supporting the second access technology in the reselection process, that is, in a case that the terminal device supports the NB-IoT access technology and other access technologies, the terminal device may reselect not only to a cell supporting the NB-IoT access technology but also to cells supporting other access technologies.

It should be noted that the terminal device in the embodiment of the present invention supports the NB-IoT access technology and other access technologies different from the NB-IoT access technology.

A network system architecture applied to the cell reselection method provided by the embodiment of the present invention is described below.

Fig. 1 shows a possible network system architecture to which the cell reselection method according to the embodiment of the present invention is applied. The network system architecture includes a terminal device 10, a network device 11, and a network device 12 and 13.

The terminal device 10 accesses the resident cell by the first access technology or the second access technology, and the neighboring cells of the current resident cell and the resident cell include a cell supporting the first access technology and a cell supporting the second access technology.

In the embodiment of the present invention, the network device 11, the network device 12, and the network device 13 may be different devices, or may be partially or completely the same network device. Each network device may support a first access technology, may also support a second access technology, and may also support both the first access technology and the second access technology.

It should be noted that, in the embodiment of the present invention, one cell may support both the first access technology and the second access technology.

Further, the terminal device 10 described above may be a wireless terminal device, which may be a device providing voice and/or other service data connectivity to a user, a handheld device with wireless communication functionality, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved PLMN network, etc. A wireless terminal device may communicate with one or more core networks via a Radio Access Network (RAN), and may be a mobile terminal, such as a mobile telephone (or "cellular" telephone) and a computer with a mobile terminal, for example, a portable, pocket, hand-held, computer-included or vehicle-mounted mobile device, which exchanges languages and/or data with the RAN, and Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like, and may also be a mobile device, a UE terminal, an access terminal, a wireless communication device, a terminal unit, a terminal station, a mobile station (mobile station), a mobile terminal, or a mobile terminal, A mobile station (mobile), a remote station (remote station), a remote station, a remote terminal (remote terminal), a subscriber unit (subscriber unit), a subscriber station (subscriber station), a user agent (user agent), a terminal device, and the like. As an example, in the embodiment of the present invention, fig. 1 illustrates that the terminal device is a mobile phone.

The network device 11, the network device 12, or the network device 13 may be a base station, a core network device, a transmission and reception node (TRP), a relay station or an access point, a Location Measurement Unit (LMU), or the like. The network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) or Code Division Multiple Access (CDMA) network, or an nb (nodeb) in a Wideband Code Division Multiple Access (WCDMA) network, or a gtnb in NR or a network device in a future evolution network, or a network device in a narrowband internet of things network. The network device may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario.

The cell reselection method provided by the embodiment of the present invention may be applied to a mobile terminal such as a mobile phone, and may also be applied to other terminal devices such as a terminal device with an operating system. For the convenience of understanding of those skilled in the art, the cell reselection method provided in the embodiment of the present invention is applied to a mobile phone as an example, and the cell handover method is described below.

The cell reselection method according to the embodiment of the present invention is described below with reference to fig. 2. Fig. 2 is a flowchart illustrating a cell reselection method according to an embodiment of the present invention, as shown in fig. 2, the cell reselection method includes steps S201 to S203:

s201, the network equipment sends reselection information to the terminal equipment.

The reselection information is used to indicate M first frequencies, where the M first frequencies include a frequency supporting a first access technology and/or a frequency supporting a second access technology, and when the M first frequencies are frequencies supporting the first access technology, the M first frequencies are determined according to a cell reselection mode, a frequency of a target cell is one of the M first frequencies, and M is a positive integer, and the reselection information is also used to indicate the terminal device to reselect the cell.

That is, the M first frequencies may include only a frequency supporting the first access technology, may include a frequency supporting the second access technology, or may include a frequency supporting the first access technology and a frequency supporting the second access technology.

That is, if the cells corresponding to the M first frequencies include cells supporting a second access technology other than the first access technology, the target cell may be a cell supporting the first access technology or a cell supporting the second access technology.

The first access technology is a narrowband Internet of things (NB-IoT) access technology, and the second access technology is an access technology different from the first access technology.

It should be noted that, the above-mentioned first access technology is a narrowband internet of things access technology, which can be understood as follows: the first access technology may be used for a narrowband internet of things system, or the first access technology may be used for a narrowband internet of things access technology, or the first access technology may be used for a narrowband internet of things system. In general, an NB-IoT network may use licensed (license) frequency bands, which may coexist with existing networks. NB-IoT may use deployments of in-band carriers, guard-band carriers, or stand-alone carriers. For example, NB-IoT may use frequencies in LTE's frequency bands, LTE guard bands, and bands other than LTE.

It should be noted that the second access technology may be a radio access technology or other access technologies.

For example, the second access technology may be an access technology in an LTE system or an access technology in a New Radio (NR) system.

It is noted that the second access technology may comprise at least one access technology different from the first access technology.

Optionally, the reselection information may be carried in one broadcast information sent by the network device, or may also be carried in multiple broadcast information sent by the network device, which is not specifically limited in this embodiment of the present invention.

It should be noted that the M first frequencies indicated in the reselection information may include at least one of a frequency of a cell in which the terminal device resides and a frequency of a neighboring cell of the cell in which the terminal device resides.

Alternatively, the network device may indicate the M first frequencies in a plurality of pieces of system information, and the network device may also indicate the M first frequencies in one piece of system information.

S202, the terminal equipment receives the reselection information from the network equipment.

It can be understood that the terminal device obtains reselection information through the network device, and may use the received reselection information sent by the network device when performing cell reselection.

S203, the terminal device reselects the target cell according to the reselection information and the target reselection rule.

It should be noted that, in general, the reselection information may further include an identifier of a neighboring cell, and then the terminal device may determine a cell that meets the target reselection criterion, and certainly, the reselection information may also not include the identifier of the neighboring cell, and the terminal device may actively search for a corresponding neighboring cell according to the frequency in the reselection information.

According to the cell reselection method provided by the embodiment of the invention, the terminal equipment reselects the target cell according to the reselection information and the target reselection rule. Since the reselection information indicates that the M first frequencies include a frequency supporting a first access technology and a frequency supporting a second access technology, the M first frequencies may be a resident cell of the terminal device and a neighboring cell of the resident cell; the target frequency meeting the reselection criterion may be a frequency supporting the first access technology or a frequency supporting the second access technology, and therefore, the terminal device may reselect to a cell corresponding to the frequency supporting the first access technology or a cell corresponding to the frequency supporting the second access technology in the reselection process, that is, in a case that the terminal device supports the NB-IoT access technology and other access technologies, the terminal device may reselect not only to a cell supporting the NB-IoT access technology but also to cells supporting other access technologies.

Optionally, the reselection information is further configured to indicate a priority of all or part of the M first frequencies in a cell reselection process.

Specifically, when the network device sends reselection information to the terminal device, the reselection information may carry a frequency that can be used by the terminal device for cell reselection and a priority value corresponding to the frequency.

For example, the reselection information may indicate that the priority of frequency 1 is 4, the priority of frequency 2 is 5, and the priority of frequency 3 is 3.

Optionally, the network device may carry the priority of the frequency in the broadcasted system information, or the network device may also carry the priority of the frequency in a Radio Resource Control (RRC) signaling, or may configure the priority corresponding to the corresponding access technology.

Accordingly, the terminal device may obtain the priority of each of the M first frequencies in the reselection information through different approaches. For example, the terminal device may obtain the priority of the frequency from the received system broadcast, the terminal device may obtain the priority of the frequency from the RRC signaling, and the terminal device may also determine the priority of the frequency according to the access technology used by the frequency, for example, the priority of one frequency may inherit the priority of the access technology used by the frequency.

Based on the scheme, the terminal device may select the frequency according to the order of the priority of the frequency in the cell reselection process of the reselection information, determine whether the cell corresponding to the frequency meets a target reselection criterion, and reselect the terminal device to the cell corresponding to the frequency when the cell meets the target reselection criterion.

Optionally, the reselection information is further configured to indicate a cell reselection mode corresponding to all or part of the M first frequencies; wherein the cell reselection mode comprises any one of the following modes: common-frequency reselection, pilot-frequency reselection and inter-system reselection.

Optionally, the reselection information is further used to indicate at least one of the following: parameters of a same-frequency reselection mode, parameters of pilot frequency reselection and parameters of pilot system reselection.

In an example, the parameter of the same-frequency reselection mode is used to indicate a first reselection criterion, the parameter of inter-frequency reselection is used to indicate a second reselection criterion, and the parameter of inter-system reselection is used to indicate a third reselection criterion.

It should be noted that, if the cell reselection mode corresponding to the frequency is the same-frequency reselection, the reselection information may not carry the frequency, and indicates that the frequency is the same as the frequency of the resident cell; if the cell reselection mode corresponding to the frequency is inter-frequency reselection, the reselection information may carry a frequency used for reselection, and if the cell reselection mode corresponding to the frequency is inter-system reselection, the reselection information may carry all or part of the frequency used for reselection.

It can be understood that the frequency corresponding to the same-frequency reselection is the same as the frequency of the resident cell; the frequency corresponding to the inter-frequency reselection is different from the frequency of the resident cell, and the frequency corresponding to the inter-system reselection may be the same as the frequency of the resident cell or may include a frequency different from the frequency of the resident cell.

Specifically, the reselection information may indicate which frequencies the same-frequency reselection mode may be adopted, which frequencies the different-frequency reselection mode may be adopted, and which frequencies the different-system reselection mode may be adopted.

It can be understood that, when the frequency is the frequency of the same-frequency reselection mode, the terminal device determines whether the cell corresponding to the frequency meets the target reselection criterion corresponding to the same-frequency cell; when the frequency is the frequency of the pilot frequency reselection mode, the terminal equipment determines whether the cell corresponding to the frequency meets a target reselection criterion corresponding to the pilot frequency cell; when the frequency is in the inter-system reselection mode, the terminal device determines whether the cell corresponding to the frequency meets the target reselection criterion corresponding to the inter-system cell.

Optionally, when the cell reselection mode is inter-system cell reselection, the M first frequencies are frequencies supporting the first access technology.

Optionally, the reselection information indicates K frequency lists, where the K frequency lists include the M first frequencies, and K is a positive integer.

It is understood that the reselection information acquired by the terminal device may indicate the above-mentioned M first frequencies in the form of a frequency list.

Optionally, in the cell reselection method according to the embodiment of the present invention, when K is equal to 1, the reselection information is used to indicate the first frequency list. The first frequency list includes the M first frequencies.

For example, the reselection information may configure the first access technology supporting frequency corresponding to the interratceselectioninfo-NB as the M first frequencies.

It should be noted that the network device may configure the first frequency list to include only the frequency supporting the first access technology, may also configure the first frequency list to include only the frequency supporting the second access technology, and may also configure the first list to include both the frequency supporting the first access technology and the frequency supporting the second access technology, which is not specifically limited in this embodiment of the present invention.

Optionally, in a case that a system of the cell where the terminal device resides is different from a system of a neighboring cell of the cell where the terminal device resides, that is, in a case that a cell reselection mode is inter-system cell reselection, the network device may configure that the first frequency list only includes frequencies supporting the first access technology.

Optionally, in the cell reselection method provided in the embodiment of the present invention, when K is 1, the reselection information is used to indicate the first frequency list; the first frequency list also comprises J first identifications, and one first identification corresponds to at least one frequency; the first identifier is used for indicating the access technologies supported by the corresponding frequency, and J is a positive integer less than or equal to M.

Illustratively, the first frequency list sequentially includes: frequency 1+ type _ NB, frequency 1+ type _ LTE, frequency 2+ type _ NB, frequency 3+ type _ NB, frequency 2, frequency 3. When the terminal device performs cell reselection, it is sequentially determined whether a cell corresponding to "frequency 1+ type _ NB", "frequency 1+ type _ LTE", "frequency 2+ type _ NB", "frequency 3+ type _ NB", "frequency 2" and "frequency 3" satisfy a target reselection criterion.

It should be noted that the network device may sequentially configure the priority of each frequency according to the first identifier, and then send the reselection information to the terminal device.

Optionally, in this embodiment of the present invention, in a case that the reselection information is used to indicate the first frequency list, the foregoing S203 may be executed by S203 a:

s203a, the terminal device reselects to the target cell according to the frequency priority or the ranking order of the M first frequencies in the first frequency list and the target reselection rule.

It is to be understood that the frequencies in the first frequency list comprise frequencies supporting a first access technology and/or frequencies supporting a second access technology.

Optionally, the frequencies in the first frequency list may be sorted from top to bottom according to the frequency priority, may also be sorted from bottom to top according to the frequency priority, and may also be a sort order of the network device configuration according to other conditions, which is not specifically limited in this embodiment of the present invention.

It should be noted that the terminal device may sequentially determine whether the frequency in the first frequency list satisfies the target reselection criterion, if not, continue to determine whether the next frequency satisfies the target reselection criterion according to the frequency priority or the ranking order, and if so, reselect the terminal device to the cell corresponding to the frequency satisfying the target reselection criterion.

Optionally, in the cell reselection method according to the embodiment of the present invention, when K is 2, the reselection information is used to indicate the second frequency list and the third frequency list. Wherein the second frequency list comprises frequencies supporting the first access technology; the third list of frequencies includes frequencies supporting the second access technology. That is, two frequency lists may be indicated in the reselection information acquired by the terminal device.

It should be noted that the network device may configure one System Information Block (SIB) to carry the second frequency list and the third frequency list, or may configure two SIBs to carry the second frequency list and the third frequency list respectively.

It should be noted that, in practical application, the network device selects a suitable SIB or other information to carry each frequency list as needed.

Optionally, in the cell reselection method provided in this embodiment of the present invention, when K is 2, the reselection information is used to indicate the second frequency list and the third frequency list. The above S203 may be performed by S203 b:

s203b, the terminal device reselects to the target cell according to the frequency priority or the ranking order of the frequencies in the target frequency list and the target reselection rule.

Wherein the list of target frequencies comprises at least one of: a second list of frequencies and a third list of frequencies.

It can be understood that the target frequency list may be a second frequency list, a third frequency list, or a fourth frequency list obtained by combining the second frequency list and the third frequency list by the terminal device.

Optionally, the target frequency list may be configured for the network device, may also be specified for the communication protocol, and may also be determined by the terminal device, which is not specifically limited in this embodiment of the present invention.

Illustratively, the second frequency list includes frequency 1, frequency 2, and frequency 3, and the third frequency list includes frequency 2, frequency 3, and frequency 4. If the terminal device selects the target frequency according to the second frequency list, frequency 1, frequency 2, and frequency 3 may be sequentially used as the target frequency, if the terminal device selects the target frequency according to the second frequency list, frequency 2, frequency 3, and frequency 4 may be sequentially used as the target frequency, if the terminal device selects the target frequency according to the second frequency list and the third frequency list, the terminal device may combine the second frequency list and the third frequency list, and sort the combined fourth frequency list into frequency 1, frequency 2, frequency 3, and frequency 4. The terminal device may then take frequency 1, frequency 2, frequency 3, and frequency 4 as the target frequencies in sequence. Assuming that the frequencies in the fourth frequency list are sorted according to their priorities, and assuming that the frequencies are frequency 1, frequency 3, frequency 4, and frequency 2 in this order, the terminal device may take frequency 1, frequency 3, frequency 4, and frequency 2 in this order as target frequencies.

In this scheme, the terminal device may sequentially determine whether cells corresponding to frequencies in the target frequency list satisfy the target reselection criterion according to the frequency priority or the ranking order, if not, continue to determine a cell corresponding to a next frequency according to the frequency priority or the ranking order, and if so, reselect the terminal device to a cell corresponding to a frequency that satisfies the target reselection criterion.

Optionally, the target reselection criterion includes at least one of: a first reselection criterion, a second reselection criterion, a third reselection criterion.

For different cell reselection modes, a target reselection criterion may be configured by the network device, agreed by a protocol, or selected for the terminal device. In the following, for different cell reselection modes, target reselection criteria corresponding to the different cell reselection modes are introduced respectively.

Mode 1:

and under the condition that the cell reselection mode corresponding to the second frequency is same-frequency reselection, or the cell reselection mode corresponding to the second frequency is pilot frequency reselection and the frequency priorities of pilot frequency cells in neighboring cells of a resident cell of the terminal device are the same, the target reselection criterion corresponding to the second frequency is a first reselection criterion, and the second frequency is at least one of the M first frequencies.

It can also be understood that, when the neighboring cell is an intra-frequency cell, or when the neighboring cell is an inter-frequency cell and the frequency priorities of inter-frequency cells in neighboring cells of the camping cell of the terminal device are the same, the target reselection criterion is the first reselection criterion.

Further, the first reselection criterion may be configured by the network device, may be specified by a protocol, or may be predefined.

Based on the scheme, the terminal device may perform co-frequency reselection according to a cell reselection mode corresponding to the second frequency, or perform inter-frequency reselection under the condition that the frequency priorities of inter-frequency cells in neighboring cells of a resident cell of the terminal device are the same, where the inter-frequency cell reselection is determined by the terminal device to perform cell reselection measurement, and the first reselection criterion is determined as a target reselection criterion adopted by the terminal device.

Illustratively, the first reselection criterion includes any one of:

condition 1: and reselecting the cell with the best channel quality in the resident cell of the terminal equipment and the cells adjacent to the resident cell.

Condition 2: and reselecting the cell with the best channel quality in the neighbor cells of the resident cell of the terminal equipment.

Condition 3: and reselecting the cell with the largest target value in the resident cell of the terminal equipment and the neighbor cells of the resident cell.

Condition 4: and reselecting the cell with the largest target value in the neighbor cells of the resident cell of the terminal equipment.

Wherein the target value of a cell is: the target evaluation factor is used for weighting the target measurement value of the cell to obtain the target measurement value; the target measurement value of the one cell is used for indicating the channel quality of the one cell; the M first frequencies include at least one of a frequency of a resident cell of the terminal device and a frequency of a neighbor cell of the resident cell.

It should be noted that the first reselection criterion may be configured by the network device, may be specified by a protocol, or may be determined by the terminal device.

Optionally, the target measurement value obtained by weighting the target measurement value of the cell by the target evaluation factor may be greater than the target measurement value, may also be smaller than the target measurement value, and may also be equal to the target measurement value.

It should be noted that, if the terminal device determines whether the cell corresponding to the target frequency meets the target reselection criterion by using the condition 1 or the condition 2, the terminal device needs to compare channel qualities of multiple cells. If the terminal device determines whether the cell corresponding to the target frequency meets the target reselection criterion by using the condition 3 or the condition 4, the terminal device needs to compare target values of a plurality of cells.

Optionally, when one cell is a resident cell of the terminal device, the target evaluation factor is a first evaluation factor; in the case where one cell is a neighbor cell of the camped cell, the target evaluation factor is the second evaluation factor.

It should be noted that the target evaluation factor may be configured for the network device. Each second evaluation factor may be the same or different.

Based on the scheme, the terminal device may use at least one of the above conditions 1 to 4 as a first reselection criterion, and determine whether the cell corresponding to the second frequency meets the first reselection criterion, and if the cell meets the first reselection criterion, the terminal device reselects to the cell.

Mode 2:

and under the condition that the cell reselection mode corresponding to the third frequency is pilot frequency reselection and the frequency priorities of pilot frequency cells in neighboring cells of the resident cell of the terminal device are different, the target reselection criterion corresponding to the third frequency is a second reselection criterion, and the third frequency is at least one of the M first frequencies.

It can also be understood that, in the case that the neighboring cells are inter-frequency cells and the frequency priorities of inter-frequency cells in neighboring cells among the resident cells of the terminal device are the same, the target reselection criterion is the second reselection criterion.

Further, the second reselection criterion may be configured by the network device, may be specified by a protocol, or may be predefined.

Based on the scheme, the terminal device may determine to execute cell reselection measurement when the cell reselection mode corresponding to the third frequency is pilot frequency reselection and the frequency priorities of pilot frequency cells in neighboring cells of the resident cell of the terminal device are different, and determine that the second reselection criterion is a target reselection criterion adopted by the terminal device.

Illustratively, the second reselection criterion includes any one of the following conditions:

condition 5: and reselecting the cell in the cell where the channel quality is greater than or equal to a first threshold value, the duration time is greater than or equal to a second threshold value, and the frequency priority is the highest among the resident cell of the terminal equipment and the cells adjacent to the resident cell.

The first threshold and the second threshold are configured thresholds of the network device.

Condition 6: and reselecting the cell in the cells with the highest frequency priority, wherein the channel quality in the neighbor cells of the resident cell of the terminal equipment is greater than or equal to a first threshold, the duration is greater than or equal to a second threshold, and the frequency priority is the highest.

Wherein the M first frequencies comprise at least one of a frequency of a resident cell of the terminal device and a frequency of a neighbor cell of the resident cell.

Specifically, the terminal device may sequentially determine whether each frequency satisfies the second reselection criterion according to a sequence or an arrangement order of the priority of the frequencies in the frequency list from high to low, and if the second reselection criterion is satisfied, reselect to the cell and no longer determine other cells. That is, the terminal device may select the target cell that meets the target reselection criterion only by determining once, or may select the target cell that meets the target reselection criterion only by determining multiple times.

It can be understood that, under the condition that the terminal device determines according to the order of the frequency priorities from high to low, if a cell corresponding to a frequency with a high priority satisfies the second reselection criterion, the terminal device reselects to the cell, and does not determine whether a cell corresponding to a frequency with a low priority satisfies the second reselection criterion any more, and if a cell corresponding to a frequency with a high priority does not satisfy the second reselection criterion, the terminal device continues to determine whether a cell corresponding to a frequency with a low priority satisfies the second reselection criterion.

Based on this scheme, the terminal device may use at least one of the condition 5 and the condition 6 as a second reselection criterion, and if the cell corresponding to the target frequency meets the second reselection criterion, the terminal device reselects the target cell.

It should be noted that, if the cell reselection process includes pilot frequencies with the same frequency, the same frequency priority as the frequency priority of the resident cell, and pilot frequencies with different frequency priorities from the frequency priority of the resident cell, the terminal device determines whether the cells corresponding to the frequencies meet the corresponding reselection criteria in sequence according to the frequency priorities, and if so, does not continue to determine.

For example, the frequency 1 and the frequency 2 have the same priority as the frequency 3 of the resident cell, and the frequency before the priority does not satisfy the reselection criterion, the terminal device reselects to the cell corresponding to the frequency 1, the cell corresponding to the frequency 2, and the cell satisfying the first reselection criterion among the resident cells. If there are cells that meet the first reselection criterion, no further frequencies of low priority are determined.

If the frequency 4 and the frequency 5 are higher than the priorities of the frequency 3, the frequency 1, and the frequency 2 of the resident cell, and the frequency 4 and the frequency 5 are different from the frequency 3, the terminal device may determine a cell that satisfies the second reselection criterion among the cells corresponding to the resident cell, the frequency 4, and the frequency 5. If there are cells that meet the second reselection criterion, no further frequencies of low priority are determined.

That is, in the case that the cell reselection process includes pilot frequencies with the same frequency, the same frequency priority as the frequency priority of the resident cell, and pilot frequencies with different frequency priorities from the frequency priority of the resident cell, it may be determined only according to the first reselection criterion or only according to the second reselection criterion in the cell reselection process.

Mode 3:

and under the condition that the cell reselection mode corresponding to the fourth frequency is the inter-system reselection, the target reselection criterion corresponding to the fourth frequency is a third reselection criterion, and the fourth frequency is at least one of the M first frequencies.

It may also be understood that, in case the neighboring cell is a heterogeneous system cell, the target reselection criterion is a third reselection criterion.

It should be noted that, in the embodiment of the present invention, the frequency corresponding to the inter-system cell may be an inter-frequency or a co-frequency.

Further, the third reselection criterion may be configured by the network device, may be specified by a protocol, or may be predefined.

Based on the scheme, the terminal device may determine to execute cell reselection measurement when the cell reselection mode corresponding to the fourth frequency is inter-system reselection, and determine that the third reselection criterion is the target reselection criterion adopted by the terminal device.

Illustratively, the third reselection criterion includes at least one of the following conditions:

Condition 2: and reselecting the cell with the best channel quality in the resident cells of the terminal equipment.

Condition 4: and reselecting the cell with the largest target value in the neighbor cells of the resident cell.

Condition 5: and reselecting the cell in the cell where the channel quality is greater than or equal to a first threshold value, the duration is greater than or equal to a second threshold value and the frequency priority is highest among the resident cell of the terminal equipment and the cells adjacent to the resident cell.

As for the description of the target value, the description in the above mode 1 may be referred to, and the description is omitted here.

It should be noted that, when the cell is an intra-frequency cell, or when the cell is an inter-frequency cell and the frequency priorities of inter-frequency cells in neighboring cells of the resident cell of the terminal device are the same, any one of the conditions 1 to 4 may be adopted for the determination. In the case where the cell is a pilot cell and the frequency priority of the pilot cell in the neighboring cell among the resident cells of the terminal device is the same, the determination may be performed by using any one of the conditions 5 and 6.

It should be noted that, during inter-system reselection, the M first frequencies may include a frequency that is partially the same as the frequency of the camping cell and a frequency that is partially different from the frequency of the camping cell. The terminal device may sequentially determine whether a cell corresponding to one frequency meets a target reselection criterion according to the priority of the frequency, if one cell is an inter-frequency cell, the terminal device may determine whether the cell meets the reselection criterion by using at least one of conditions 1, 2, 3, and 4, and if one cell is an intra-frequency cell, the terminal device may determine whether the cell meets the reselection criterion by using at least one of conditions 5 and 6. After determining the cell corresponding to the high-priority frequency and meeting the reselection rule by adopting at least one of the condition 1, the condition 2, the condition 3 and the condition 4, the other low-priority frequencies are not judged. Or after the cell corresponding to the high-priority frequency meets the cell reselection rule is determined by adopting at least one of the conditions 5 and 6, the other low-priority frequencies are not judged.

Based on this scheme, the terminal device may use at least one of the above conditions 1 to 6 as a first reselection criterion, and if the terminal device determines whether the cell corresponding to the fourth frequency meets the above third reselection criterion, the terminal device reselects to the target cell if the cell meets the third reselection criterion.

Optionally, in this embodiment of the present invention, the channel quality of one cell may be the channel quality of the cell measured by the terminal device in the cell reselection process, and may use a measured value of signal quality of the cell received by the terminal device to indicate the channel quality of the cell, or may use a measured value of signal strength of the cell received by the terminal device to indicate the channel quality of the cell, or of course, may use other parameters to indicate the channel quality of one cell.

For example, taking a frequency supporting an access technology in an LTE system as an example, the signal quality may indicate the channel quality of a cell, and the signal strength may also indicate the channel quality of the cell.

In the above condition 1, the terminal device may select, as the target cell, a cell having the best signal quality among the camped cell and the neighboring cells of the camped cell according to the following formula (1) and formula (2).

In the above condition 2, the terminal device may select a cell with the best signal quality from neighboring cells of the camping cell as the target cell according to the following formula (2).

R_s＝Q_meas,s+Q_Hyst-Qoffset_temp+Qoffset_SCPTMFormula (1)

R_n＝Q_meas,n-Qoffset-Qoffset_temp+Qoffset_SCPTMFormula (2)

Wherein R is_sIndicating the signal quality of the resident cell in the cell reselection process; r_nIndicating the signal quality of a neighboring cell of the resident cell during the cell reselection; q_meas,sIndicating the Reference Signal Receiving Power (RSRP) received by the terminal device from the camping cell during the cell reselection process) The measured quantity of (2); q_meas,nThe method comprises the steps that in a cell reselection process, terminal equipment receives RSRP measurement quantity from an adjacent cell; q_HystA speed-based scaling factor representing a configuration of the network device when the number of reselected cells of the terminal device exceeds N within a specified time_{CR_H}The terminal device is in a high-speed moving state when the value is equal to the value, and Q is in the high-speed moving state when the terminal device is in the value_HystTaking the value as a configured sf-High value, and when the number of reselected cells of the terminal equipment exceeds N within a specified time_{CR_M}The terminal equipment is in a medium-speed moving state at the time of value, and Q is in the medium-speed moving state at the time of the terminal equipment_HystThe value of (a) is a configured sf-Medium value, and the factor is not adopted when the terminal equipment is in other states; qoffset_tempA temporary offset representing a cell configured by the network device; qoffset_SCPTMTemporary offset representing a point from a single cell point to a multipoint (SC-PTM) configured by the network device, if the network device is configured with Qoffset_SCPTMQoffset is not used. Qoffset represents the offset between cells configured by the network equipment, and for the same-frequency cell, if the offset Qoffset of the resident cell and the neighboring cell of the resident cell is configured_s,nQoffset is equal to Qoffset_s,nIf Qoffset is not configured_s,nQoffset is equal to 0; for the pilot frequency cell, if Qoffset is configured_s,nQoffset is equal to Qoffset_s,nAdding an inter-frequency offset Qoffset_frequencyIf Qoffset is not configured_s,nQoffset is equal to Qoffset_frequency。

In the above condition 3, the terminal device may select, according to the following formula (3) and formula (4), a cell with a largest target value among the camped cell and the neighboring cells of the camped cell as a target cell that satisfies the target reselection criterion.

R'_s＝R_s×Q_{type_s}Formula (3)

R'_n＝R_n×Q_{type_n}Formula (4)

Wherein R'_sRepresenting the target value, R 'of the cell in residence'_nIndicating a target value, Q, of a neighbor cell_{type_s}Express the first commentEstimation factor, Q_{type_n}Representing a second evaluation factor.

Specifically, the terminal device may determine R 'according to formula (3) and formula (4)'_sAnd R'_nThe cell with the largest median is the target cell satisfying condition 3.

Specifically, the terminal device may determine R 'according to formula (4)'_nThe cell with the largest median is the target cell satisfying condition 4.

In the above conditions 5 and 6, the channel quality S of the cell may be determined according to the following formula (5) or formula (6), so as to sequentially determine whether the channel quality S of the cell corresponding to each frequency meets the target reselection criterion according to the priority or the frequency ranking order.

Optionally, S may be a signal strength of a signal received by the terminal device from the cell, or may be a signal quality of a signal received by the terminal device from the cell.

S_rxlex＝Q_rxlevmeas-(Q_rxlevmin+Q_{rxlevminoffset})-P_compensation-Qoffset_tempFormula (5)

S_qual＝Q_qualmeas-(Q_qualmin+Q_{rxlevminoffset})-Qoffset_tempFormula (6)

Specifically, the terminal device may determine S according to formula (5)_rxlexWhether the value is greater than or equal to Thresh_X,HighQ(i.e., the first threshold) and determining whether the duration is greater than or equal to Treselection_RAT(i.e., the second threshold value) to determine whether one cell satisfies the above-described condition 4.

Specifically, the terminal device may determine S according to formula (6)_qualWhether the value is greater than or equal to Thresh_X,HighP(i.e., the first threshold) and determining whether the duration is greater than or equal to Treselection_RAT(i.e., the second threshold value) to determine whether one cell satisfies the above-described condition 5.

Wherein S is_rxlexRepresents the signal strength of the signal received by the terminal equipment from the cell, and the unit is decibel (dB); s_qualRepresents the signal quality of the signal received by the terminal equipment from the cell, and the unit is dB; q_rxlevmeasThe unit of the RSRP value of the terminal equipment measuring cell is decibel milliwatt (dBm); q_rxlevminThe minimum receiving strength of the RSRP of the cell is represented, and the unit is dBm; q_{rxlevminoffset}Means for employing S when the terminal device is camped on a Virtual Public Land Mobile Network (VPLMN) or a Visited Public Land Mobile Network (VPLMN) to search for a high priority Public Land Mobile Network (PLMN)_rxlexEvaluating cell channel quality, for Q_rxlevminThe offset of (2); p_compensationRepresenting the compensation amount, if the terminal equipment supports SIB1, SIB3 and SIB5, P_compensationThe values are as follows: max (P)_EMAX1-P_PowerClass,0)-(min(P_EMAX2,P_PowerClass)-min(P_EMAX1,P_PowerClass) In dB, P if the terminal device does not support SIB1, SIB3, and SIB5_compensationThe values are as follows: max (P)_EMAX1-P_PowerClass,0) In the unit dB, where P_EMAX1The maximum uplink transmission power of the terminal equipment is obtained from the system information P-Max for the terminal equipment_EMAX2Acquiring the cell uplink maximum transmission power of the terminal equipment from the system information NS-PmaxList for the terminal equipment; p_PowerClassRepresents a maximum wireless signal (RF) output power of the terminal device; qoffset_tempRepresents a temporary offset of the cell; q_qualmeasA Reference Signal Receiving Quality (RSRQ) value representing a cell measured by a terminal device; q_qualminRepresents the RSRQ minimum received quality requirement of the cell in dB; q_{rxlevminoffset}Indicating that S is used when the terminal resides on a VPLMN searching for a high priority PLMN_qualEvaluating cell quality, requiring Q_qualminThe amount of shift performed.

Of course, in order to improve the speed of reselecting the cell of the terminal device, at least one of RSRP and RSRQ may be directly used to indicate the channel quality of a cell.

Fig. 3 is a schematic diagram of a possible structure of a terminal device according to an embodiment of the present invention, and as shown in fig. 3, the terminal device 300 includes: a reselection module 301; the system is used for reselecting the target cell according to the reselection information and the target reselection rule; wherein the reselection information is used to indicate M first frequencies, the M first frequencies include a frequency supporting a first access technology and a frequency supporting a second access technology, and the frequency of the target cell is one of the M first frequencies; the first access technology is a narrowband Internet of things access technology, the second access technology is an access technology different from the first access technology, and M is a positive integer.

Optionally, the reselection information is further used to indicate a priority of all or part of the M first frequencies in the cell reselection process.

Optionally, the reselection information is further used to indicate at least one of: parameters of a same-frequency reselection mode, parameters of pilot frequency reselection and parameters of pilot system reselection.

Optionally, in the case that K is 1, the reselection information is used to indicate the first frequency list; the reselection module 301 is specifically configured to reselect to the target cell according to the frequency priorities or the ranking orders of the M first frequencies in the first frequency list and the target reselection rule.

Optionally, in the case that K is 1, the reselection information is used to indicate the first frequency list; the first frequency list also comprises J first identifications, and one first identification corresponds to at least one frequency; the first identifier is used for indicating the access technologies supported by the corresponding frequency, and J is a positive integer less than or equal to M.

Optionally, in the case of K ═ 2, the reselection information is used to indicate the second frequency list and the third frequency list; the second frequency list comprises frequencies supporting the first access technology; the third list of frequencies includes frequencies supporting the second access technology.

Optionally, the reselection module is specifically configured to select a target frequency from the target frequency list according to a frequency priority or an arrangement order of frequencies in the target frequency list; wherein the list of target frequencies comprises at least one of: a second list of frequencies and a third list of frequencies.

Optionally, when the cell reselection mode corresponding to the second frequency is intra-frequency reselection, or the cell reselection mode corresponding to the second frequency is inter-frequency reselection and the frequency priorities of inter-frequency cells in neighboring cells of a cell where the terminal device resides are the same, the target reselection criterion corresponding to the second frequency is a first reselection criterion, and the second frequency is at least one of the M first frequencies.

Optionally, the first reselection criterion includes any one of the following conditions: condition 1: reselecting the resident cell and the cell with the best channel quality in the neighbor cells of the resident cell; condition 2: reselecting the cell with the best channel quality in the neighbor cells of the resident cell; condition 3: reselecting the cell with the largest target value in the resident cell and the neighbor cells of the resident cell; condition 4: reselecting a cell with the largest target value in the neighbor cells of the resident cell; the target values for a cell are: weighting a target measurement value of a cell by a target evaluation factor to obtain the target measurement value; the target measurement value of one cell is used for indicating the channel quality of one cell; the M first frequencies include at least one of a frequency of a resident cell and a frequency of a neighbor cell of the resident cell.

Optionally, when one cell is a camping cell, the target evaluation factor is a first evaluation factor; in the case where one cell is a neighbor cell of the camped cell, the target evaluation factor is the second evaluation factor.

Optionally, when the cell reselection mode corresponding to the third frequency is inter-frequency reselection and the frequency priorities of inter-frequency cells in neighboring cells of the cell where the terminal device resides are different, the target reselection criterion corresponding to the third frequency is the second reselection criterion, and the third frequency is at least one of the M first frequencies.

Optionally, the second reselection criterion includes any one of the following conditions: condition 5: reselecting the resident cell and a cell in the cells with the highest frequency priority, wherein the channel quality of the resident cell and the neighbor cells of the resident cell is greater than or equal to a first threshold, the duration of the resident cell is greater than or equal to a second threshold, and the frequency priority of the resident cell is the highest; condition 6: reselecting a cell in a cell which has channel quality greater than or equal to a first threshold, has duration greater than or equal to a second threshold and has the highest frequency priority in neighbor cells of the resident cell; the M first frequencies include at least one of a frequency of a resident cell and a frequency of a neighbor cell of the resident cell.

Optionally, when the cell reselection manner corresponding to the fourth frequency is inter-system reselection, the target reselection criterion corresponding to the fourth frequency is a third reselection criterion, and the fourth frequency is at least one of the M first frequencies.

Optionally, the third reselection criterion includes at least one of the following conditions: condition 1: reselecting the resident cell and the cell with the best channel quality in the neighbor cells of the resident cell; condition 2: reselecting the cell with the best channel quality in the neighbor cells of the resident cell; condition 3: reselecting the cell with the largest target value in the resident cell and the neighbor cells of the resident cell; condition 4: reselecting a cell with the largest target value in the neighbor cells of the resident cell; condition 5: reselecting the resident cell and a cell in the cells with the highest frequency priority, wherein the channel quality of the resident cell and the neighbor cells of the resident cell is greater than or equal to a first threshold, the duration of the resident cell is greater than or equal to a second threshold, and the frequency priority of the resident cell is the highest; condition 6: reselecting a cell in a cell which has channel quality greater than or equal to a first threshold, has duration greater than or equal to a second threshold and has the highest frequency priority in neighbor cells of the resident cell; the target values for a cell are: weighting a target measurement value of a cell by a target evaluation factor to obtain the target measurement value; the target measurement value of one cell is used for indicating the channel quality of one cell; the M first frequencies include at least one of a frequency of a resident cell and a frequency of a neighbor cell of the resident cell.

Optionally, with reference to fig. 3, as shown in fig. 4, the terminal device 300 further includes: a receiving module 302; a receiving module 302, configured to receive reselection information from the network device before the reselection module 301 obtains the target frequency from the reselection information.

The terminal device 300 provided in the embodiment of the present invention can implement each process implemented by the terminal device in the foregoing method embodiments, and for avoiding repetition, details are not described here again.

According to the terminal device provided by the embodiment of the invention, the terminal device reselects the target cell according to the reselection information and the target reselection rule. Since the reselection information indicates that the M first frequencies include a frequency supporting a first access technology and a frequency supporting a second access technology, the M first frequencies may be a resident cell of the terminal device and a neighboring cell of the resident cell; the target frequency meeting the reselection criterion may be a frequency supporting the first access technology or a frequency supporting the second access technology, and therefore, the terminal device may reselect to a cell corresponding to the frequency supporting the first access technology or a cell corresponding to the frequency supporting the second access technology in the reselection process, that is, in a case that the terminal device supports the NB-IoT access technology and other access technologies, the terminal device may reselect not only to a cell supporting the NB-IoT access technology but also to cells supporting other access technologies.

Fig. 5 is a schematic diagram of a possible structure of a network device according to an embodiment of the present invention, and as shown in fig. 5, a network device 500 includes a sending module 501; a sending module 501, configured to send reselection information to a terminal device; the reselection information is used for indicating the terminal equipment to reselect the cell; the reselection information is used for indicating M first frequencies, wherein the M first frequencies comprise frequencies supporting a first access technology and/or frequencies supporting a second access technology; in the case that the M first frequencies are frequencies supporting the first access technology, the M first frequencies are determined according to a cell reselection manner; the first access technology is a narrowband Internet of things access technology, the second access technology is an access technology different from the first access technology, and M is a positive integer.

Optionally, when the cell reselection mode is inter-system cell reselection, the M first frequencies are frequencies supporting a first access technology.

The network device 500 provided in the embodiment of the present invention can implement each process implemented by the network device in the foregoing method embodiments, and for avoiding repetition, details are not described here again.

In the network device provided in the embodiment of the present invention, the network device sends reselection information to the terminal device, and since the reselection information is used to indicate that the M first frequencies include a frequency supporting a first access technology and/or a frequency supporting a second access technology, the M first frequencies are determined according to a cell reselection mode when the M first frequencies are frequencies supporting the first access technology; the M first frequencies may be a cell where the terminal device resides and a neighboring cell of the cell where the terminal device resides; the target frequency meeting the reselection criterion may be a frequency supporting the first access technology or a frequency supporting the second access technology, so that the terminal device may reselect to a cell corresponding to the frequency supporting the first access technology or a cell corresponding to the frequency supporting the second access technology in the reselection process, that is, in a case that the terminal device supports the NB-IoT access technology and other access technologies, the terminal device may reselect not only to a cell supporting the NB-IoT access technology but also to cells supporting other access technologies.

Fig. 6 is a schematic diagram of a hardware structure of a terminal device for implementing various embodiments of the present invention, where the terminal device 100 includes, but is not limited to: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the terminal device configuration shown in fig. 6 does not constitute a limitation of the terminal device, and that the terminal device may include more or fewer components than shown, or combine certain components, or a different arrangement of components. In the embodiment of the present invention, the terminal device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal device, a wearable device, a pedometer, and the like.

The processor 110 is configured to reselect to a target cell according to reselection information and a target reselection rule; wherein the reselection information is used to indicate M first frequencies, the M first frequencies include a frequency supporting a first access technology and/or a frequency supporting a second access technology, and the frequency of the target cell is one of the M first frequencies; the first access technology is a narrowband Internet of things access technology, the second access technology is an access technology different from the first access technology, and M is a positive integer.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 101 may be used for receiving and sending signals during a message transmission or call process, and specifically, after receiving downlink data from a base station, the downlink data is processed by the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through a wireless communication system.

The terminal device provides wireless broadband internet access to the user through the network module 102, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the network module 102 or stored in the memory 109 into an audio signal and output as sound. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the terminal device 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 includes a speaker, a buzzer, a receiver, and the like.

The input unit 104 is used to receive an audio or video signal. The input unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, and the graphics processor 1041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the network module 102. The microphone 1042 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode.

The terminal device 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or the backlight when the terminal device 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal device posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 105 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 106 is used to display information input by a user or information provided to the user. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal device. Specifically, the user input unit 107 includes a touch panel 1071 and other input devices 1072. Touch panel 1071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 1071 (e.g., operations by a user on or near touch panel 1071 using a finger, stylus, or any suitable object or attachment). The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and receives and executes commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. Specifically, other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 1071 may be overlaid on the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although in fig. 6, the touch panel 1071 and the display panel 1061 are two independent components to implement the input and output functions of the terminal device, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the terminal device, and is not limited herein.

The interface unit 108 is an interface for connecting an external device to the terminal apparatus 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal apparatus 100 or may be used to transmit data between the terminal apparatus 100 and the external device.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the terminal device, connects various parts of the entire terminal device by using various interfaces and lines, and performs various functions of the terminal device and processes data by running or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the terminal device. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The terminal device 100 may further include a power supply 111 (such as a battery) for supplying power to each component, and preferably, the power supply 111 may be logically connected to the processor 110 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

In addition, the terminal device 100 includes some functional modules that are not shown, and are not described in detail here.

Fig. 7 is a schematic hardware structure diagram of a network device for implementing an embodiment of the present invention, where the network device 700 includes: a processor 701, a memory 702, and a transceiver 703.

The transceiver 703 is configured to send reselection information to the terminal device; the reselection information is used for indicating the terminal equipment to reselect the cell; the reselection information is used for indicating M first frequencies, wherein the M first frequencies comprise frequencies supporting a first access technology and frequencies supporting a second access technology; the first access technology is a narrowband Internet of things access technology, the second access technology is an access technology different from the first access technology, and M is a positive integer.

In this embodiment of the present invention, one or more processors 701, memory 702, and transceiver 703 may be connected to each other. The one or more processors 701 may be a baseband processing unit (BBU), which may also be referred to as an indoor baseband processing unit; the transceiver may be a Remote Radio Unit (RRU), which may also be referred to as a remote transmission unit. In addition, the network device 700 may further include some functional modules that are not shown, and are not described herein again.

In addition, the network device 700 further includes some functional modules that are not shown, and are not described herein again.

Optionally, an embodiment of the present invention further provides a terminal device, which, with reference to fig. 6, includes a processor 110, a memory 109, and a computer program that is stored in the memory 109 and is executable on the processor 110, where the computer program, when executed by the processor 110, implements each process of the cell reselection method embodiment, and can achieve the same technical effect, and is not described herein again to avoid repetition.

Optionally, an embodiment of the present invention further provides a network device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the cell reselection method embodiment, and can achieve the same technical effect, and details are not repeated here to avoid repetition.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the cell reselection method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be, for example, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

The terminal device, the network device, and the computer storage medium provided in the embodiments of the present invention are all configured to execute the corresponding cell reselection method provided above, and therefore, the beneficial effects achieved by the terminal device, the network device, and the computer storage medium may refer to the beneficial effects in the corresponding cell reselection method provided above, and are not described herein again.

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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be substantially or partially embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the cell reselection method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A cell reselection method is applied to a terminal device, and comprises the following steps:

reselecting the target cell according to the reselection information and the target reselection rule;

2. The method of claim 1, wherein the reselection information is further used to indicate a priority of all or a portion of the M first frequencies during cell reselection.

3. The method of claim 1, wherein the reselection information indicates K frequency lists, the K frequency lists comprising the M first frequencies, and wherein K is a positive integer.

4. The method of claim 3, wherein in the case where K ═ 1, the reselection information is used to indicate a first frequency list; the reselecting to the target cell according to the reselection information and the target reselection rule includes:

and reselecting the target cell according to the frequency priority or the ranking order of the M first frequencies in the first frequency list and a target reselection rule.

5. The method of claim 3, wherein in the case where K ═ 1, the reselection information is used to indicate a first frequency list; the first frequency list further comprises J first identifications, and one first identification corresponds to at least one frequency; the first identifier is used for indicating the access technologies supported by the corresponding frequency, and J is a positive integer less than or equal to M.

6. The method of claim 3, wherein in the case of K-2, the reselection information is used to indicate a second frequency list and a third frequency list;

the second frequency list comprises frequencies supporting the first access technology;

the third list of frequencies includes frequencies supporting the second access technology.

7. The method of claim 6, wherein reselecting to the target cell according to the reselection information and a target reselection rule comprises:

reselecting the target cell according to the frequency priority or the ranking order of the frequencies in the target frequency list and a target reselection rule;

wherein the list of target frequencies comprises at least one of: the second list of frequencies and the third list of frequencies.

8. The method according to any one of claims 1 to 7,

and when the cell reselection mode corresponding to the second frequency is intra-frequency reselection, or the cell reselection mode corresponding to the second frequency is inter-frequency reselection and the frequency priorities of inter-frequency cells in neighboring cells of a resident cell of the terminal device are the same, the target reselection criterion corresponding to the second frequency is a first reselection criterion, and the second frequency is at least one of the M first frequencies.

9. The method of claim 8, wherein the first reselection criterion comprises any of:

condition 1: reselecting the cell with the best channel quality in the resident cell and the adjacent cell;

condition 2: reselecting the cell with the best channel quality in the adjacent cells;

condition 3: reselecting the cell with the largest target value in the resident cell and the neighbor cells;

condition 4: reselecting the cell with the largest target value in the resident cell and the neighbor cells;

the target values for a cell are: weighting the target measurement value of the cell by the target evaluation factor to obtain the target measurement value; the target measurement value of the one cell is used for indicating the channel quality of the one cell; the M first frequencies include at least one of a frequency of the resident cell and a frequency of the neighbor cell.

10. The method according to any one of claims 1 to 7, wherein when the cell reselection mode corresponding to a third frequency is inter-frequency reselection and the frequency priorities of inter-frequency cells in neighboring cells of the camping cell of the terminal device are different, the target reselection criterion corresponding to the third frequency is a second reselection criterion, and the third frequency is at least one of the M first frequencies.

11. The method of claim 10, wherein the second reselection criterion comprises any one of:

condition 5: reselecting a cell in the resident cell and the neighbor cell, wherein the channel quality of the resident cell and the neighbor cell is greater than or equal to a first threshold, the duration of the resident cell and the neighbor cell is greater than or equal to a second threshold, and the frequency priority of the resident cell and the neighbor cell is highest;

condition 6: reselecting a cell in the cells with the highest frequency priority, wherein the channel quality of the neighbor cells is greater than or equal to a first threshold, the duration of the cell is greater than or equal to a second threshold, and the frequency priority is highest;

the M first frequencies include at least one of a frequency of the resident cell and a frequency of the neighbor cell.

12. The method according to any one of claims 1 to 7, wherein, when the cell reselection mode corresponding to a fourth frequency is inter-system reselection, the target reselection criterion corresponding to the fourth frequency is a third reselection criterion, and the fourth frequency is at least one of the M first frequencies.

13. The method of claim 12, wherein the third reselection criterion includes at least one of:

condition 1: reselecting the cell with the best channel quality in the resident cell of the terminal equipment and the adjacent cells of the terminal equipment;

condition 4: reselecting the cell with the largest target value in the adjacent cells;

the target values for a cell are: weighting the target measurement value of the cell by the target evaluation factor to obtain the target measurement value; the target measurement value of the one cell is used for indicating the channel quality of the one cell;

14. The method according to claim 9, wherein in case one cell is the camped cell, the target evaluation factor is a first evaluation factor; the target evaluation factor is a second evaluation factor in case one cell is the neighbor cell.

15. The method according to claim 13, wherein in case one cell is the camped cell, the target evaluation factor is a first evaluation factor; the target evaluation factor is a second evaluation factor in case one cell is the neighbor cell.

16. The method of claim 1, wherein before reselecting to the target cell according to the reselection information and a target reselection rule, the method further comprises:

receiving the reselection information from a network device.

17. A cell reselection method applied to a network device, the method comprising:

sending reselection information to the terminal equipment;

wherein the reselection information is used for indicating the terminal equipment to reselect a cell; the reselection information is used for indicating M first frequencies, wherein the M first frequencies comprise frequencies supporting a first access technology and/or frequencies supporting a second access technology; in the case that the M first frequencies are frequencies supporting the first access technology, the M first frequencies are determined according to a cell reselection manner;

18. The method of claim 17, wherein the M first frequencies are frequencies supporting the first access technology when the cell reselection mode is inter-system cell reselection.

19. The method of claim 17, wherein the reselection information is further configured to indicate a priority of all or a portion of the M first frequencies during cell reselection.

20. The method of claim 17, wherein the reselection information indicates K frequency lists, the K frequency lists comprising the M first frequencies, and wherein K is a positive integer.

21. The method of claim 20, wherein in the case of K-2, the reselection information is used to indicate a second frequency list and a third frequency list;

22. A terminal device, characterized in that the terminal device comprises: a reselection module;

23. A network device, characterized in that the network device comprises a sending module;

wherein the reselection information is used for indicating the terminal equipment to reselect a cell; the reselection information is used for indicating M first frequencies, wherein the M first frequencies comprise frequencies supporting a first access technology and frequencies supporting a second access technology; in the case that the M first frequencies are frequencies supporting the first access technology, the M first frequencies are determined according to a cell reselection manner;

24. A terminal device, characterized in that the terminal device comprises a processor, a memory and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the cell reselection method according to any one of claims 1 to 16.

25. A network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of a cell reselection method as claimed in any one of claims 17 to 21.

26. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the cell reselection method according to any one of claims 1 to 16 or according to any one of claims 17 to 21.