CN115767642A - Cell reselection method and communication device - Google Patents

Cell reselection method and communication device Download PDF

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CN115767642A
CN115767642A CN202111035457.2A CN202111035457A CN115767642A CN 115767642 A CN115767642 A CN 115767642A CN 202111035457 A CN202111035457 A CN 202111035457A CN 115767642 A CN115767642 A CN 115767642A
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priority
target
frequency point
slices
cell
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孙飞
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The embodiment of the application provides a cell reselection method and a communication device, wherein the cell reselection method comprises the following steps: acquiring priority information of at least one target slice, wherein the priority information of each target slice comprises the priority of each target slice and/or the priority of each target slice on different frequency points; determining reselection priorities of frequency points corresponding to the serving cell and each cell in the one or more neighboring cells based on the priority information of the at least one target slice; and performing cell reselection based on the reselection priorities of the frequency points corresponding to the serving cell and each cell in the one or more adjacent cells. Therefore, the design of the reselection priority for cell reselection is more reasonable, the terminal equipment can reselect a proper cell more quickly, the network delay is reduced, and the use experience of a user is improved.

Description

Cell reselection method and communication device
Technical Field
The present application relates to the field of communications, and more particularly, to a cell reselection method and a communication apparatus.
Background
Cell reselection (cell reselection) refers to a process of selecting a best cell to provide a service signal by monitoring signal quality of a neighboring cell and a current serving cell when a terminal device is in an idle state or an inactive state. In the process of cell reselection, the terminal device usually starts cell measurement according to the reselection priority of each cell, and then selects a suitable cell to access according to the measurement result.
With the development of mobile communication technology, some communication systems, such as the fifth generation, are now available(5 th generation) mobile communication system, network Slicing (NS), which may also be referred to as slicing for short, is introduced. In the process of cell reselection, how to combine slices supported by each cell to select a suitable cell for access becomes a technical problem to be solved urgently.
Disclosure of Invention
The application provides a cell reselection method and a communication device, so that terminal equipment can select a proper cell to access, and the improvement of user experience is facilitated.
In a first aspect, the present application provides a cell reselection method, including obtaining priority information of at least one target slice; the at least one target slice comprises one or more slices which are expected to be accessed by the terminal equipment in the slices supported by the frequency points respectively corresponding to the service cell and one or more adjacent cells of the terminal equipment, or one or more slices which are allowed to be accessed and configured to the terminal equipment by the network equipment, or one or more slices which are configured to the terminal equipment by an operator; the priority information of each target slice comprises the priority of each target slice and/or the priority of each target slice on different frequency points; determining reselection priorities of frequency points corresponding to the serving cell and each cell in the one or more neighbor cells based on the priority information of the at least one target slice; and performing cell reselection based on the reselection priorities of the frequency points corresponding to the serving cell and each cell in the one or more adjacent cells.
The slice which the terminal device expects to access belongs to the slice which is configured for the terminal device by the network device and allows access, and the slice which is configured for the terminal device by the network device and allows access belongs to the slice of the terminal device configured by the operator. That is, the target slice includes a slice that the terminal device desires to access. In addition, since the target slice is supported by the frequency points corresponding to the serving cell and the neighboring cell of the terminal device, the target slice is also supported by the serving cell and the neighboring cell. In other words, when the terminal device performs cell reselection, slices supported by each cell and its own slicing requirements are considered.
In addition, priority information of the target slice is introduced, and the priority information of the target slice comprises at least one of the priority of the target slice and the priority of the target slice on different frequency points. Therefore, the terminal device may determine the reselection priority of the frequency point corresponding to the serving cell or the neighboring cell in combination with the priority information of the target slice supported by each cell during the cell reselection. In other words, the reselection priority based on which the terminal device performs cell reselection is combined with the priority information of each target slice, and is not limited by the number of slices that the terminal device is allowed to access among the slices supported by each cell. Therefore, the design of the reselection priority for cell reselection is more reasonable, the terminal equipment can reselect a proper cell more quickly, the network delay is reduced, and the use experience of a user is improved.
With reference to the first aspect, in some possible implementation manners of the first aspect, the priority of the target slice includes a priority value of the target slice, and the priority value of the target slice is carried in a non-access stratum NAS message, where the NAS message is used to configure one or more slices for the terminal device.
With reference to the first aspect, in some possible implementations of the first aspect, the priority of the target slice includes a value corresponding to an ordering of the target slice in a non-access stratum, NAS, message, where the NAS message is used to configure one or more slices for the terminal device.
Two possible forms of the priority of the target slice are defined above, but this should not constitute any limitation to the present application. The present application is not limited to a specific form of the priority of the target slice.
With reference to the first aspect, in some possible implementations of the first aspect, the method further includes: the priority of the target slice on different frequency points comprises the priority values of the target slice on different frequency points.
Optionally, the priority values of the target slice at different frequency points are carried in a broadcast message or Radio Resource Control (RRC) dedicated signaling. The embodiment of the present application does not limit the specific signaling used for carrying the priority values of the target slice at different frequency points.
The following provides three possible implementations for determining reselection priorities of frequency points.
In a first possible implementation manner, the method further includes: the priority information of the target slice comprises the priority of the target slice, and the reselection priority of the frequency point is determined by the sum of the priorities of one or more slices supported by the frequency point.
That is, the priority of the same slice on different frequency points may be the same, or the priority of the slice is not different according to the frequency points. Therefore, the reselection priority of the frequency point may be the sum of the priorities of the slices supported by the frequency point, or may be related to the sum, for example, a mathematical transformation may be performed on the basis of the sum, so as to obtain the reselection priority of the frequency point corresponding to the sum.
In this implementation, the reselection priority of the frequency point is related to both the number of supported target slices and the priority of the target slice. Due to the fact that the number of the target slices and the priority of the target slices are considered, the obtained reselection priority of the frequency point is more reasonable.
In a second possible implementation manner, the method further includes: the priority information of the target slices comprises the priorities of the target slices on different frequency points, and the reselection priority of the frequency points is determined by the sum of the priorities of one or more target slices supported by the frequency points on the frequency points.
That is, the priority of the same slice may be different in different frequency bins, or the priority of the slice may be different from one frequency bin to another. Therefore, the reselection priority of the frequency point may be the sum of the priorities of the slices supported by the frequency point on the frequency point, or may be related to the sum, for example, a mathematical transformation may be performed on the basis of the sum, so as to obtain the reselection priority of the frequency point corresponding to the sum.
In this implementation, the reselection priority for the frequency point is related to both the number of supported target slices and the priority of the target slices on the frequency point. Because the number of the target slices and the priority of the target slices on the frequency point are considered, and the difference of the priorities of the slices possibly existing on different frequency points is further considered, the obtained reselection priority of the frequency point is more reasonable.
In a third possible implementation manner, the method further includes: the priority information of the target slices comprises the priorities of the target slices and the priorities of the target slices on different frequency points, and the reselection priority of the frequency point is determined by the priority of one or more target slices supported by the frequency point and the priorities of the one or more target slices on the frequency point respectively.
In this implementation, the reselection priority of the frequency point is related to both the number of supported target slices and the priority of the target slices on the frequency point. Due to the fact that the number of the target slices, the priority of the target slices and the possible difference of the priorities of the target slices on different frequency points are considered, the obtained reselection priority of the frequency points is more reasonable.
Optionally, the method further comprises: the reselection priority of the frequency point is determined by the priority of one or more target slices supported by the frequency point and the priority of the one or more target slices on the frequency point respectively, and includes: the reselection priority of the frequency point, the priority of one or more target slices supported by the frequency point and the priority of the one or more target slices at the frequency point respectively satisfy:
Figure BDA0003244926660000031
wherein, P F Indicating the reselection priority, P, of frequency point F F Is greater than 0; n represents the number of the target slices supported by the frequency point F, and is an integer larger than or equal to 1; p (S) n ) Representing the priority of the nth slice in the N target slices supported by the frequency point F, wherein N is more than or equal to 1 and less than or equal to N, and is an integer; p (S) n And F) represents the priority of the nth slice on the frequency point FAnd (4) stages.
It should be understood that the relationship between the priority of the frequency point and the priority of the target slice, and the priority of the target slice on the frequency point, which is listed in the above formula, is only an example, and should not constitute any limitation to the present application. For example, when the correspondence between the priority level of the target slice and the priority value is inconsistent with the correspondence between the priority level of the target slice on the frequency point and the priority value, a certain parameter in the relationship may be processed, such as reciprocal calculation, and the like. This is not a limitation of the present application. For another example, the reselection priority of the frequency point may also be obtained by performing a mathematical transformation based on the relationship shown above.
It will also be appreciated that the mathematical transformation described above comprises a linear transformation that operates on one or more of the following: adding an arbitrary value, subtracting an arbitrary value, multiplying an arbitrary value, or dividing an arbitrary value.
In a second aspect, the present application provides a communication device comprising means or units for implementing the method of the first aspect as well as any of its possible implementations. It should be understood that the respective modules or units may implement the respective functions by executing the computer program.
In a third aspect, the present application provides a communication apparatus, including a processor, configured to perform the method for cell reselection described in the first aspect and any possible implementation manner of the first aspect.
The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, which when executing instructions stored in the memory, may implement the methods described in the above aspects. The apparatus may also include a communication interface for the apparatus to communicate with other devices, which may be, for example, a transceiver, circuit, bus, module, or other type of communication interface.
In a fourth aspect, the present application provides a chip system comprising at least one processor configured to support the implementation of the functionality referred to in the first aspect and any one of the possible implementations of the first aspect, for example, to receive or process data and/or information referred to in the above methods.
In one possible design, the system-on-chip further includes a memory to hold program instructions and data, the memory being located within the processor or external to the processor.
The chip system may be formed by a chip, and may also include a chip and other discrete devices.
In a fifth aspect, the present application provides a computer-readable storage medium comprising a computer program which, when run on a computer, causes the computer to carry out the method of the first aspect as well as any one of the possible implementations of the first aspect.
In a sixth aspect, the present application provides a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the first aspect and the method of any possible implementation of the first aspect.
In a seventh aspect, an embodiment of the present application provides a communication system, including the foregoing network device and terminal device.
It should be understood that the second to seventh aspects of the present application correspond to the technical solutions of the first aspect of the present application, and the advantageous effects obtained by the aspects and the corresponding possible implementations are similar and will not be described again.
Drawings
Fig. 1 is a schematic diagram of a communication system suitable for use in a cell reselection method of an embodiment of the present application;
FIG. 2 is a schematic illustration of slices supported at different frequency bins within the same RA;
FIG. 3 is a schematic illustration of slices supported by different bins within different RA's;
fig. 4 is a flowchart illustrating a cell reselection method according to the present application;
FIG. 5 is a schematic block diagram of a communication device provided herein;
FIG. 6 is another schematic block diagram of a communication device provided herein;
fig. 7 is a schematic structural diagram of a terminal device provided in the present application.
Detailed Description
The technical solution in the present application will be described below with reference to the accompanying drawings.
The technical scheme provided by the application can be applied to various communication systems, such as: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Wireless Local Area Network (WLAN), an LTE system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a worldwide interoperability for microwave Access (Technology NR) communication system, a 5G mobile telecommunications system, or a new radio Access Technology (NR). The 5G mobile communication system may include a non-independent Network (NSA) and/or an independent network (SA), among others.
The technical scheme provided by the application can also be applied to future communication systems, such as a sixth generation (6G) mobile communication system and the like. This is not a limitation of the present application.
In the embodiment of the present application, the network device may be any device having a wireless transceiving function. The apparatus includes, but is not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP), a wireless relay Node, a wireless backhaul Node, etc. in a Wi-Fi system, or may be 5G, such as a bbb in an NR system, or an antenna panel of one or a group (including multiple antenna panels) of base stations in a 5G system, or may be a network Node constituting a gbb, such as a baseband unit (BBU), or a distributed unit (distributed unit, centralized DU), a centralized unit (centralized DU), a CU 6 unit, etc. in a next generation communication system, or a CU 6 CU.
In some deployments, the gNB may include CUs and DUs. Illustratively, the CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU is responsible for processing non-real-time protocols and services, implementing the functions of an RRC and a Packet Data Convergence Protocol (PDCP) layer; the DU may include a function of a Radio Link Control (RLC) layer, a function of a MAC layer, and a partial function of a Physical (PHY) layer.
Illustratively, the DU may include functionality of higher layers in the PHY layer. Among them, the functions of the higher layer in the PHY layer may include Cyclic Redundancy Check (CRC) function, channel coding, rate matching, scrambling, modulation, and layer mapping; alternatively, the functions of the higher layers in the PHY layer may include cyclic redundancy check, channel coding, rate matching, scrambling, modulation, layer mapping, and precoding. The function of the lower layer in the PHY layer may be implemented by another network entity independent from the DU, where the function of the lower layer in the PHY layer may include precoding, resource mapping, physical antenna mapping, and radio frequency function; alternatively, the functions of the lower layers in the PHY layer may include resource mapping, physical antenna mapping, and radio frequency functions. The embodiment of the present application does not limit the functional division between the upper layer and the bottom layer in the PHY layer. When the function of the lower layer in the PHY layer can be implemented in another network entity independent from the DU, the DU sends data or information to other communication devices (e.g., terminal equipment, core network equipment), which may be understood as: the DU performs functions of the RLC layer, the MAC layer, and, a part of the functions of the PHY layer. For example, after the DU completes the functions of the RLC layer and the MAC layer, and cyclic redundancy check, channel coding, rate matching, scrambling, modulation, and layer mapping, the remaining mapping and transmission functions on the physical resources are performed by a network entity independent of the DU that performs the functions of the lower layers in the PHY layer.
The network device provides a service for a cell, and a terminal device communicates with the cell through a transmission resource (e.g., a frequency domain resource, or a spectrum resource) allocated by the network device, where the cell may belong to a macro base station (e.g., a macro eNB or a macro gNB), or may belong to a base station corresponding to a small cell (small cell), where the small cell may include: urban cell (metro cell), micro cell (microcell), pico cell (pico cell), femto cell (femto cell), etc., and these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission service.
In an embodiment of the present application, a terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment.
The terminal device may be a device providing voice/data connectivity to a user, e.g. a handheld device, a vehicle mounted device, etc. with wireless connection capability. Currently, some examples of the terminal devices may be: mobile phone (mobile phone), tablet computer (pad), computer with wireless transceiving function (such as notebook computer, palm computer, etc.), mobile Internet Device (MID), virtual Reality (VR) device, augmented Reality (AR) device, wireless terminal in industrial control (industrial control), wireless terminal in unmanned driving (self driving), wireless terminal in remote medical (remote medical), wireless terminal in smart grid (smart grid), wireless terminal in transportation safety (transportation safety), wireless terminal in smart city (smart city), wireless terminal in smart home (smart home), cellular phone, cordless phone, session initiation protocol (session initiation protocol), SIP) phones, wireless Local Loop (WLL) stations, personal Digital Assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks or terminal devices in future-evolving Public Land Mobile Networks (PLMNs), and the like.
Wherein, wearable equipment also can be called as wearing formula smart machine, is the general term of using wearing formula technique to carry out intelligent design, developing the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.
In addition, the terminal device may also be a terminal device in an internet of things (IoT) system. The IoT is an important component of future information technology development, and is mainly technically characterized in that articles are connected with a network through a communication technology, so that an intelligent network with man-machine interconnection and object interconnection is realized. The IoT technology can achieve massive connection, deep coverage, and power saving of the terminal through, for example, narrowband (NB) technology.
In addition, the terminal equipment can also comprise sensors such as an intelligent printer, a train detector, a gas station and the like, and the main functions of the terminal equipment comprise data collection (part of the terminal equipment), control information and downlink data receiving of the network equipment, electromagnetic wave sending and uplink data transmission to the network equipment.
In order to better understand the cell reselection method provided in the embodiments of the present application, first, the terms referred to in the present application are briefly described.
1. Network slicing: is an end-to-end, logically private network that provides specific network capabilities. Through flexible allocation of network resources and networking on demand, a plurality of mutually isolated logic subnets with different characteristics can be simulated on the same set of physical facilities to provide services for users in a targeted manner. This logical subnet is called a network slice. The network slice can be used by an operator, and provides mutually isolated and function-customizable network services for different vertical industries, different clients and different services based on a Service Level Agreement (SLA) signed by a client. Different network slices can be identified and distinguished by single network slice selection support information (S-NSSAI).
There are often many access network devices, such as the gNB, within the entire service area of a network slice. Each access network device has a coverage area, which may be one or more cells (cells), and each cell has a unique global identity (CGI). The service area of the entire network slice is divided into several areas, i.e., one or more Tracking Areas (TAs). The TA may be identified using a Tracking Area Identifier (TAI). The TA consists of one or more cells.
2. Cell (cell): the cells are described by higher layers from the point of view of resource management, mobility management or serving elements. The coverage area of each access network device may be divided into one or more cells, and each cell may correspond to a frequency range. Each cell may operate in a corresponding frequency range. The frequency range may be a frequency point or a frequency band. This is not a limitation of the present application.
It should be noted that a cell may be an area within the coverage of a wireless network of access network devices. In the embodiment of the present application, different cells may correspond to the same or different access network devices.
In the embodiment of the present application, one cell corresponds to one frequency point, and hereinafter, the cell and the frequency point are used alternately, and the expressed meaning is the same. The cell priority is the frequency point priority. In the cell reselection process, the terminal device needs to determine which cells need to be measured and which cells need to be measured preferentially according to the frequency point priority, so that the frequency point priority is also referred to as a reselection priority in this embodiment of the present application.
3. Cell reselection: cell reselection refers to a process of selecting a best cell to provide a service signal by monitoring signal quality of a neighboring cell and a current cell when a terminal device is in an idle state or a deactivated state. Cell reselection is basically divided into the following 3 steps:
step one, measuring a current service cell and an adjacent cell (for example, cells including a same frequency, an different frequency and a different system) according to a measurement starting standard.
Specifically, if there is a neighboring cell with a higher priority than the current serving cell, the measurement needs to be started unconditionally no matter how good the quality of the current serving cell of the terminal device is. If there is a neighboring cell whose priority is equal to or less than the current serving cell, the terminal device may determine whether the neighboring cell needs to be measured according to the signal quality of the current serving cell. For example, if the signal quality of the serving cell is higher than a preset threshold, no neighbor cell measurement is needed; if the signal quality of the serving cell is lower than or equal to a preset threshold, the neighbor cell needs to be measured.
By way of example and not limitation, the signal quality and its corresponding preset thresholds include, for example: parameter S rxlev And its corresponding threshold S intrasearchP And S nonintrasearchP And a parameter S qual And its corresponding threshold S intrasearchQ And S nonintrasearchP . Wherein the parameter S rxlev Is a measurement value related to reference signal received energy (RSRP), a threshold S intrasearchP Is the corresponding threshold for starting the same frequency measurement, threshold S nonintrasearchP Is the threshold of starting different frequency or different system measurement corresponding to the threshold; parameter S qual Is a measurement related to Reference Signal Reception Quality (RSRQ), a threshold S intrasearchQ Is the corresponding threshold for starting the same frequency measurement, threshold S nonintrasearchQ Is the threshold for initiating inter-frequency or inter-system measurements corresponding thereto.
If the adjacent cell with the same frequency with the priority lower than or equal to the priority of the service cell exists, if the S of the service cell exists rxlev ≤S intrasearchP And S is qual ≤S intrasearchQ Then, the same frequency cell can be startedIs measured. If there is pilot frequency with priority lower than or equal to that of service cell or adjacent area of a system, if S of service cell rxlev ≤S nonintrasearchP And, S qual ≤S nonintrasearchQ Then measurements on inter-frequency cells may be initiated. It should be appreciated that the priority of co-channel cells is typically not lower than the serving cell. A neighbor cell with a lower priority than the serving cell is typically present in inter-frequency and inter-system cells.
And step two, judging whether the adjacent cell signal meets the reselection standard or not.
After starting the measurement, the terminal device may perform cell reselection according to a result of the cell measurement. The terminal device may execute a cell reselection process according to the order of cell reselection at a high priority frequency point, cell reselection at an equal priority frequency point, and cell reselection at a low priority frequency point. That is to say, if the cell with the high priority frequency meets the reselection condition, the terminal device may perform cell reselection with the high priority frequency point; otherwise, whether the cells of the frequency points with the same priority conform to reselection conditions can be further judged; if the cells with the same priority frequency accord with the reselection condition, the terminal equipment can execute the cell reselection of the frequency points with the same priority; otherwise, whether the cell of the low-priority frequency point meets the reselection condition can be further judged.
It should be appreciated that the relevant description regarding the discrimination of cell reselection may specifically refer to the third generation partnership project (3) rd generation partnership project,3 GPP) 38.304, and for brevity, will not be described in detail herein.
And step three, starting reselection.
After the terminal equipment finishes the measurement of the adjacent cell, the terminal equipment can try to reside in a new cell after determining that the cell meeting the residence condition exists. For example, the terminal device may search for a target cell, and after searching for the target cell, receive a system message of the target cell to determine whether the terminal device can camp normally, for example, by using the system message of the target cell, determine whether the target cell is access restricted, for example, whether to prohibit access (barred) or reserve access (reserved), and access class, etc. And under the condition that the target cell can be accessed, the terminal equipment can reside in the target cell after receiving the system message. The terminal device has now reselected to a new cell.
Of course, the terminal device may continue to camp on the current serving cell if the cell meeting the camping condition is not found through the measurement of the neighboring cell.
It should be understood that the above-described procedures of cell reselection are only examples, and should not limit the embodiments of the present application in any way. The terminal device may perform cell reselection as specified for the cell reselection procedure in the current protocol.
4. RRC idle state: or simply idle state. Is a state of the terminal device, and is defined in the NR and LTE protocols. The terminal equipment in the idle state and the access network equipment do not have RRC connection, so that the effect of saving electricity can be achieved. However, the terminal device does not maintain a context (e.g., UE context) at the access network device, i.e., the access network device does not know whether the terminal device exists. The terminal device has been assigned a unique identity within the Tracking Area (TA) in which it is located. Furthermore, the terminal device is already registered in the core network and there is a context in the core network. But no non-access stratum (NAS) signaling connection exists between the terminal device and the core network device.
5. RRC inactive state: another state of the terminal device. There are definitions in the NR protocol. The inactive state may also be referred to as an RRC deactivated state, or simply an inactive state, a deactivated state, etc. The RRC connection is disconnected between the terminal device in the inactive state and the access network device, except that the access network device may maintain the context of the terminal device in the inactive state.
In one implementation, the access network device may configure the terminal device to enter the inactive state through an RRC message. For example, the access network device may configure the terminal device to enter the inactive state via an RRC message for releasing the RRC connection. The message for releasing the RRC connection may be, for example, an RRC release (RRC release) message.
The RRC release message may instruct the terminal device to enter an idle state or an inactive state. For example, the RRC release message may include an Information Element (IE) to indicate whether the terminal device enters an idle state or an inactive state. For example, the cell may be a "suspend configuration". When the RRC release message contains the cell, indicating the terminal equipment to enter an inactive state; and when the RRC release message does not contain the cell, indicating the terminal equipment to enter an idle state. Note that, in LTE, a state similar to the inactive state, which is referred to as a light connection state, also exists. The RRC message for configuring the terminal device to enter the lightweight connection state may be, for example, an RRC connection release (RRC connection release) message.
Hereinafter, for convenience of description, the states of the terminal device having the above characteristics are collectively referred to as an inactive state to be distinguished from an RRC idle state and an RRC connected state.
It should be understood that the states of these terminal devices are named for ease of distinction only and should not be construed as limiting the application in any way. This application also does not exclude the definition of other possible names in future protocols to replace existing names, but with the same or similar characteristics. For example, the light-weight connected state is replaced by the inactive state.
For the convenience of understanding the embodiments of the present application, a communication system suitable for the method provided by the embodiments of the present application will be briefly described with reference to fig. 1.
Fig. 1 is a schematic diagram of a communication system suitable for a cell reselection method provided in an embodiment of the present application. As shown in fig. 1, the communication system 100 includes a network device 110 and a terminal device 120. Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area. As shown, network device 110 may communicate with terminal devices 120 within its coverage area.
Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area (cell). Three cells, cell #1, cell #2, and cell #3, are shown in the figure, in which the network device 110 provides communication coverage. Each cell may correspond to a frequency range. The three cells may correspond to the same frequency range or different frequency ranges, which is not limited in this embodiment of the present application. As an example, the terminal device 120 is located in cell #1.
Each of the communication devices, such as the network device 110 and the terminal device 120 in fig. 1, may be configured with multiple antennas. The plurality of antennas may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals. Additionally, each communication device can additionally include a transmitter chain and a receiver chain, each of which can comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art. Therefore, the network equipment and the terminal equipment can communicate through the multi-antenna technology.
Optionally, the wireless communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited thereto.
It should be understood that fig. 1 exemplarily shows one network device and one terminal device, but this should not constitute any limitation to the present application. Optionally, the communication system 100 may include at least one network device, and each network device may include other numbers of terminal devices within a coverage area, which is not limited in this embodiment.
As described above, with the introduction of network slices, when performing cell reselection, a terminal device needs to combine priority information of slices to select a suitable cell access.
Slices have a binding relationship with frequency. Reselection priorities for different frequencies for the same slice may also differ based on operator policy for different geographic regions. A method is known, in which, in consideration of differences of slices supported by frequency points corresponding to different cells, a priority is determined according to a number of slices (allowed NSSAIs) that are allowed to be accessed by a terminal device in the slices supported by the frequency points. That is, the more slices that the terminal device is allowed to access in the slices supported by the frequency point, the higher the reselection priority of the frequency point is; the less the number of slices allowed to be accessed by the terminal equipment in the slices supported by the frequency point, the lower the reselection priority of the frequency point. The terminal device may perform cell reselection based on the reselection priority.
However, in some scenarios, the above-described manner of determining the priority may limit the cell reselection behavior of the terminal device. For example, in a Registration Area (RA) of a terminal device, according to a homogeneous deployment assumption, the number of slices that are supported by all cells and allow the terminal device to access is the same, that is, the priorities of frequency points corresponding to all cells are the same.
For example, fig. 2 shows two cells in the same RA, denoted as cell #1 and cell #2, respectively. Cell #1 corresponds to frequency bin 1 and the supported slices include slice 1 and slice 2. Cell #2 corresponds to frequency point 2, the supported slices include slice 1 and slice 2, and slice 1 and slice 2 are both slices that allow the terminal device to access. If the reselection priorities of the frequency point 1 and the frequency point 2 are determined according to the definition mode of the frequency point priorities, the priorities of the frequency point 1 and the frequency point 2 are the same.
It is assumed that the terminal device is located in cell #1. If the slice which the terminal device expects to access at present is the slice 1, the terminal device reselects the cell based on the same reselection priority because the reselection priorities of the frequency point 1 and the frequency point 2 are the same. If there are more cells with the same reselection priority in the RA, the terminal device may only select among the multiple cells according to the signal quality, and the terminal device may take a long time to reselect to a suitable cell, which results in a long network delay and poor user experience.
In addition, for each cell outside the RA where the terminal device is located, the number of slices that are supported by each frequency point and that allow the terminal device to access may not be greater than the number of slices that are supported by any cell inside the RA and that allow the terminal device to access, that is, the priority of the frequency point corresponding to the cell outside the RA may not be higher than the priority of the frequency point corresponding to the cell inside the RA.
For example, fig. 3 shows cells in two RAs. Assuming that RA of a terminal device is RA1, RA2 is an area other than RA for the terminal device, and a cell in RA2 is a cell other than RA for the terminal device. Assuming that there is cell #1 in RA1, corresponding to frequency point 1, the supported slices include slice 1 and slice 2; in RA2, there is cell #2, corresponding to bin 2, and slices supported include slice 2 and slice 3. Since slice 3 is not within the range of the slice to which the terminal device is permitted to access, the slice to which the terminal device is permitted to access among the slices supported by the frequency points corresponding to cell #2 is slice 2. If the reselection priorities of the frequency point 1 and the frequency point 2 are determined according to the definition mode of the frequency point priorities, the reselection priority of the frequency point 1 is higher than that of the frequency point 2. And if the number of slices allowed to be accessed by the terminal device is less than 2 supported by other cells (for example, cell # 3) in RA2, the reselection priority is lower than that of any cell in RA 1. In other words, the reselection priority of any one cell in RA2 may not be higher than the reselection priority of any one cell in RA 1.
Therefore, if the reselection priorities of the frequency points are defined only according to the number of slices allowed to be accessed by the terminal device, cells with the same reselection priorities may include all cells in RA1 and a part of cells in RA2, the range for the terminal device to perform cell reselection may be larger, and it may take longer time to reselect to a suitable cell.
On the other hand, since some cells in some RA2 support fewer slices for allowing the terminal device to access than the number of slices for allowing the terminal device to access, the reselection priority may be lower than that of the cells in RA1, which may in turn cause the cell reselection of the terminal device to be limited, thereby causing the terminal device to take longer time to reselect to a suitable cell.
In summary, it can be seen that it is unreasonable to define the reselection priority only according to the number of slices that allow the terminal device to access among the slices supported by each frequency point, which may result in a large cell reselection network delay of the terminal device and poor user experience.
In view of this, the present application provides a cell reselection method, which introduces a target slice and priority information of the target slice. The target slice may be a slice that is expected to be accessed by the terminal device, a slice that is configured by the network device and allowed to be accessed by the terminal device, or a slice that is configured by the operator and is given to the terminal device, among slices supported by frequency points corresponding to a serving cell and a neighboring cell of the terminal device, and is not limited to the slice that is allowed to be accessed by the terminal device. The priority information of the slice may be determined by at least one of a priority of the slice and a priority of the slice at different frequency bins. When the terminal equipment performs cell reselection, the reselection priority can be determined according to the priority information of the slices, and the reselection priority is not limited to the number of target slices supported by each frequency point. Therefore, the design of the reselection priority is more reasonable, and the terminal device can reselect a proper cell more quickly.
The cell reselection method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
For ease of understanding, the main parameters referred to in the following examples will first be briefly described.
P F : reselection priority, P, for frequency point F F ＞0。
N: the number of target slices supported by the frequency points, wherein N is not less than 1 and is an integer. P (S) n ): and N is more than or equal to 1 and less than or equal to N, and N is an integer.
P(S n F): priority of the nth slice on frequency bin F.
As shown in fig. 4, which is a schematic diagram of a cell reselection process according to the present application, the process may include steps 410 to 430. The steps in the process 400 are described in detail below.
In step 410, priority information of at least one target slice is obtained.
The at least one target slice includes one or more slices (integrated slices) that the terminal device desires to access in the slices supported by the frequency points corresponding to the serving cell and the one or more neighboring cells of the terminal device, or one or more slices that the network device configures to the terminal device and allows access, or one or more slices (configured NSSAI) that the operator configures to the terminal device.
For example, if the target slice is a slice configured by the operator for the terminal device in the slices supported by the frequency points corresponding to the serving cell and the neighboring cell of the terminal device, in the example in conjunction with fig. 3, the operator configures the slice of the terminal device to include slice 1, slice 2, and slice 3, and then the number of target slices supported by frequency point 1 is the same as the number of target slices supported by frequency point 2, and the terminal device may further determine the reselection priority of each frequency point in conjunction with the priority information of the target slice.
In the embodiment of the present application, the priority information of each target slice includes the priority of each target slice and/or the priority of each target slice on different frequency points.
One possible design is that the priority of the target slice includes a priority value of the target slice. The priority value of the target slice may be carried in the NAS message. Another possible design is that the priority of a target slice includes a value corresponding to the ordering of the target slice in the NAS message.
In this design, the slice level of the target slice is not different due to the difference of the frequency points. In other words, the priority of the same target slice on different frequency points is the same. The priority value may be a value within a predefined range, for example, a value from 0 to 7. The larger the value, the lower the priority; the smaller the value, the higher the priority. Or, the larger the value, the higher the priority; the smaller the value, the lower the priority. The value corresponding to the ordering of the target slice in the NAS message may be understood as another way for representing the priority, for example, the value may be defined in the order from small to large according to the ordering sequence, or may be defined in the order from small to large according to the order from back to front. The correspondence between the size of the value corresponding to the ordering of the target slice in the NAS message and the priority level may be the same as the correspondence between the size of the priority value and the priority level, or may be different from the correspondence between the size of the priority value and the priority level. This is not a limitation of the present application.
The NAS message is used to configure one or more slices for the terminal device. The slice that the network device may configure for the terminal device through the NAS message may specifically refer to one or more slices that the network device configures to the terminal device and allows access, or one or more slices that an operator configures to the terminal device.
The priority of the target slice on different frequency points comprises the priority values of the target slice on different frequency points. The target slice may be carried in a broadcast message or RRC dedicated signaling at the priority values of different frequency points.
The priority values of the target slice on different frequency points may also be referred to as slice-based cell reselection priority values (cell reselection priority slices). Since the priority of the same slice at different frequency points may be different, the slice can be distinguished by the priority values of the slice at different frequency points. For example, the priority value may be a value within a certain predefined range, e.g., may be a value from 0 to 7. The larger the value, the lower the priority; the smaller the value, the higher the priority. Or, the larger the value, the higher the priority; the smaller the value, the lower the priority.
For example, the network device may carry the priority values of the target slice at different frequency points through a System Information (SI) message (i.e., an example of a broadcast message). Or, the network device may carry the priority values of the target slice at different frequency points through RRC dedicated signaling, such as an RRC release message.
It should be understood that the above examples of signaling are only examples, and should not limit the embodiments of the present application in any way.
In step 420, the reselection priorities of the frequency points corresponding to each cell in the current serving cell and the neighboring cell are determined.
In the embodiment of the application, three possible designs are provided for the reselection priority of the frequency point.
In a first possible design, the reselection priority for a frequency point may be determined by the sum of the priorities of one or more slices supported by the frequency point. Specifically, the reselection priority of the frequency point and the priority of one or more target slices supported by the frequency point satisfy:
Figure BDA0003244926660000111
for example, as shown in fig. 2, slices supported at bin 1 include slice 1 and slice 2, and slices supported at bin 2 include slice 1 and slice 2. If the frequency point 1 is denoted as F1, the frequency point 2 is denoted as F2, the slice 1 is denoted as S1, the slice 2 is denoted as S2, and the priority is denoted as P, the reselection priority P (F1) of the frequency point 1 satisfies: p (F1) = P (S1) + P (S2), reselection priority P (F) for frequency point 2 2 ) Satisfies the following conditions: p (F2) = P (S1) + P (S2). Thereby obtaining the reselection priorities of the frequency point 1 and the frequency point 2 respectively.
It should be noted that n in formula 1 is only to distinguish different slices among the slices supported by each frequency point, and it should not be limited which slices are specifically supported by each frequency point. And S1 to S3 are only to distinguish different slices, and do not indicate the nth slice of N slices supported by the frequency bins. For example, frequency point 1 supports 2 slices, slice 1 may be the 1 st slice, and slice 2 may be the 2 nd slice; alternatively, slice 2 may be the 1 st slice and slice 1 may be the 2 nd slice. Frequency point 2 supports 2 slices, slice 1 may be the 1 st slice, and slice 2 may be the 2 nd slice; alternatively, slice 2 may be the 1 st slice, and slice 1 may be the 2 nd slice. That is, S 1 Not being identical to S1, S 2 Nor is it identical to S2. For the sake of brevity, a description of the same or similar cases is omitted hereinafter.
In a second possible design, the reselection priority of a frequency point may also be determined by a sum of priorities of one or more target slices supported by the frequency point on the frequency point. Specifically, the reselection priority of the frequency point and the priority of one or more target slices supported by the frequency point on the frequency point respectively satisfy:
Figure BDA0003244926660000112
for example, as shown in fig. 3, slices supported at bin 1 include slice 1 and slice 2, and slices supported at bin 2 include slice 2 and slice 3. If frequency point 1 is denoted as F1, frequency point 3 is denoted as F3, slice 1 is denoted as S1, slice 2 is denoted as S2, slice 3 is denoted as S3, and the priority is denoted as P, priority P (F1) = P (S1, F1) + P (S2, F1) of frequency point F1, and priority P (F3) = P (S2, F3) + P (S3, F3) of frequency point F3 are represented as P. Thereby obtaining the reselection priorities of the frequency point 1 and the frequency point 3 respectively.
In a third possible design, the reselection priority of a frequency point may also be determined by the priority of one or more target slices supported by the frequency point and the priority of each of the one or more target slices on the frequency point.
Specifically, the reselection priority of the frequency point, the priority of one or more target slices supported by the frequency point, and the priority of the one or more target slices at the frequency point respectively satisfy:
Figure BDA0003244926660000113
for example, as shown in fig. 2, slices supported at bin 1 include slice 1 and slice 2, and slices supported at bin 2 include slice 1 and slice 2. If frequency point 1 is denoted as F1, frequency point 2 is denoted as F2, slice 1 is denoted as S1, slice 2 is denoted as S2, and priority is denoted as P, priority P (F1) = P (S1) × P (S1, F1) + P (S2) × P (S2, F1) of frequency point F1, priority P (F2) = P (S1) × P (S1, F2) + P (S2) × P (S2), F2 of frequency point F2 are provided. Thereby, the reselection priorities of the frequency point 1 and the frequency point 2 can be obtained respectively.
As described above, the correspondence between the size of the priority value of the target slice (or the value corresponding to the ordering of the target slice in the NAS message) and the priority level may be different from the correspondence between the size of the priority value of the target slice on the frequency point and the priority level. For example, the higher the priority value of the target slice (or the value corresponding to the ordering of the target slice in the NAS message), the higher the priority; and the higher the priority value of the target slice on the frequency point is, the lower the priority is. For another example, the higher the priority value of the target slice (or the value corresponding to the ordering of the target slice in the NAS message), the lower the priority; and the higher the priority value of the target slice on the frequency point is, the higher the priority is, and the like. In the case that the correspondence between the two is different, one of the two items may be processed, for example, taking an inverse number, calculating an inverse number, or the like, so that the correspondence between the processed values of the two items and the priority level is the same as the correspondence between the value of the other parameter and the priority level.
In the three possible designs, assuming that the terminal device is located at frequency point 1, if the priority of frequency point 2 is higher than that of frequency point 1, the terminal device will start reselection measurement; if the priority of the frequency point 2 is less than or equal to the frequency point 1, the terminal device may determine whether to start reselection measurement according to the signal quality of the current serving cell.
In step 430, cell reselection is performed based on the reselection priorities of the frequency points corresponding to the serving cell and each of the one or more neighboring cells.
The specific steps regarding cell reselection can be referred to the above related explanations regarding cell reselection. It can be understood that, in the embodiment of the present application, since the reselection priorities of the frequency points corresponding to the respective cells are redefined, the reselection priorities based on which the terminal device performs cell reselection are not limited by the number of target slices supported by the respective cells, but are combined with the priority information of the respective target slices.
An example is as follows: the terminal equipment is located in a cell corresponding to the frequency point 1, the reselection priority of the frequency point 2 is higher than that of the frequency point 1, the signal quality of the cell where the frequency point 2 is located meets the reselection standard, and the cell where the frequency point 2 is located is not limited in access, so that the terminal equipment may reselect the cell where the frequency point 2 is located through cell reselection.
Another example is as follows: the terminal equipment is located in a cell corresponding to the frequency point 1, the reselection priority of the frequency point 2 is smaller than the frequency point 1, the signal quality of the cell where the frequency point 1 is located is lower than a preset threshold, the signal quality of the cell where the frequency point 2 is located meets the reselection standard, and the cell where the frequency point 2 is located is not limited in access, so that the terminal equipment can reselect the cell where the frequency point 2 is located through cell reselection.
It should be understood that the cell signal quality shown above is only an example, and the present application is not limited thereto.
Based on the above scheme, when the terminal device performs cell reselection, slices supported by each cell and its own slice requirements are considered, and the reselection priority based on when performing cell reselection is combined with the priority information of each target slice, and is not limited by the number of slices that the terminal device is allowed to access in the slices supported by each cell. Therefore, the terminal equipment can reselect a proper cell more quickly, network delay is reduced, and user experience is improved.
Fig. 5 is a schematic block diagram of a communication device provided herein. The communication apparatus 500 shown in fig. 5 may correspond to the terminal device in the foregoing method embodiment, and for example, may be the terminal device, and may also be a component configured in the terminal device, such as a chip, a chip system, and the like. The embodiments of the present application do not limit this.
As shown in fig. 5, the communication apparatus 500 may include an obtaining unit 510, a determining unit 520, and a cell reselecting unit 530.
The apparatus 500 may be used to perform the procedure of cell reselection in fig. 4. Specifically, when the apparatus 500 is used to execute the method 400 of cell reselection in fig. 4, the obtaining unit 510 is configured to execute the step 410 in the flowchart 400, the determining unit 520 is configured to execute the step 420 in the method 400, and the cell reselection unit 530 is configured to execute the step 430 in the method 400.
It should be understood that the division of the units in the embodiments of the present application is illustrative, and is only one logical function division, and there may be other division manners in actual implementation. In addition, the units in the embodiments of the present application may be integrated into one processor, may exist alone physically, or may be integrated into one unit by two or more units. The integrated unit can be realized in a hardware mode, and can also be realized in a software functional module mode.
Fig. 6 is another schematic block diagram of a communication device as provided. As shown in fig. 6, the communication apparatus 600 includes at least one processor 610 for implementing the functions of the terminal device in the method provided in the present application.
For example, if the communication apparatus 600 corresponds to a terminal device in the method described above, the processor 610 may be configured to determine a reselection priority of a frequency point corresponding to each cell in the serving cell and the one or more neighboring cells based on the priority information of the at least one target slice; and the method can be used for cell reselection based on the reselection priorities of the frequency points corresponding to the serving cell and each cell in the one or more neighboring cells.
The communications apparatus 600 can also include at least one memory 620 for storing program instructions and/or data. A memory 620 is coupled to the processor 610. The coupling in this application is an indirect coupling or communication connection between devices, units or modules, and may be in an electrical, mechanical or other form, and is used for information interaction between the devices, units or modules. The processor 610 may operate in conjunction with the memory 620. The processor 610 may execute program instructions stored in the memory 620. At least one of the at least one memory may be included in the processor.
Communications device 600 may also include a communications interface 630. The communication interface 630 may be a transceiver, an interface, a bus, a circuit, or a device capable of implementing transceiving functions. The communication interface 630 is used to communicate with other devices over a transmission medium so that the apparatus used in the communication apparatus 600 can communicate with other devices. Illustratively, the other device may be a terminal device or a network device. The processor 610 utilizes the communication interface 630 to transmit and receive data and is configured to implement the method for cell reselection in the process corresponding to fig. 4.
The specific connection medium between the processor 610, the memory 620 and the communication interface 630 is not limited in this application. In fig. 6, the memory 620, the processor 610 and the communication interface 630 are connected by a bus 640, the bus is represented by a thick line in fig. 6, and the connection manner among other components is only schematically illustrated and is not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.
Fig. 7 is a schematic structural diagram of a terminal device provided in the present application. The terminal device may be applied in a system as shown in fig. 1. As shown in fig. 7, the terminal device 700 includes a processor 701 and a transceiver 702. Optionally, the terminal device 700 further comprises a memory 703. The processor 701, the transceiver 702 and the memory 703 may communicate with each other via an internal connection path to transmit control and/or data signals, the memory 703 is used for storing a computer program, and the processor 701 is used for calling and executing the computer program from the memory 703 to control the transceiver 702 to transmit and receive signals. Optionally, the terminal device 700 may further include an antenna 704, which is configured to transmit uplink data or uplink control signaling output by the transceiver 702 through a wireless signal.
The processor 701 and the memory 703 may be combined into a processing device, and the processor 701 is configured to execute the program code stored in the memory 703 to implement the functions described above. In particular implementations, the memory 703 may be integrated with the processor 701 or separate from the processor 701. The processor 701 may correspond to the determination unit 520 in fig. 5 or the processor 610 in fig. 6.
The transceiver 702 may correspond to the obtaining unit 510 in fig. 5 or the communication interface 630 in fig. 6. The transceiver 702 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Wherein the receiver is used for receiving signals, and the transmitter is used for transmitting signals.
Optionally, the terminal device 700 may further include a power supply 705 for supplying power to various devices or circuits in the terminal device 700.
In addition, in order to further improve the functions of the terminal device, the terminal device 700 may further include one or more of an input unit 706, a display unit 707, an audio circuit 708, a camera 709, a sensor 710, and the like, and the audio circuit may further include a speaker 708a, a microphone 708b, and the like.
It should be understood that the terminal device 700 shown in fig. 7 is capable of implementing various processes involving the terminal device in the method embodiment shown in fig. 4. The operations and/or functions of the modules in the terminal device 700 are respectively for implementing the corresponding flows in the above-described method embodiments. Reference may be made specifically to the description of the above method embodiments, and a detailed description is appropriately omitted herein to avoid redundancy.
When the terminal device 700 is configured to execute the operation flow related to the terminal device in the foregoing method embodiment, the processor 701 may be configured to execute the actions implemented inside the terminal device described in the foregoing method embodiment, and the transceiver 702 may be configured to execute the actions of the terminal device described in the foregoing method embodiment, obtaining priority information of at least one target slice, and performing cell reselection based on reselection priorities of frequency points corresponding to each cell in the serving cell and each cell in the one or more neighboring cells. Please refer to the description in the previous embodiment of the method, which is not repeated herein.
In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.
In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example. The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.
The present application further provides a computer program product comprising: computer program code which, when run on a computer, causes the computer to carry out the method performed by the terminal device in the embodiment shown in fig. 4.
The present application also provides a computer-readable storage medium storing program code, which, when run on a computer, causes the computer to execute the method performed by the terminal device in the embodiment shown in fig. 4.
The application also provides a communication system which can comprise the terminal equipment. Optionally, the communication system may further include the aforementioned network device.
The technical solutions provided in the embodiments of the present application may be wholly or partially implemented by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to be performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a terminal device or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disc (DVD)), or a semiconductor medium, among others.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (19)

1. A method of cell reselection, comprising:
acquiring priority information of at least one target slice; the at least one target slice comprises one or more slices which are expected to be accessed by the terminal equipment in the slices supported by the frequency points respectively corresponding to the service cell and one or more adjacent cells of the terminal equipment, or one or more slices which are allowed to be accessed and configured to the terminal equipment by the network equipment, or one or more slices which are configured to the terminal equipment by an operator; the priority information of each target slice comprises the priority of each target slice and/or the priority of each target slice on different frequency points;
determining reselection priorities of frequency points corresponding to the serving cell and each cell in the one or more neighboring cells based on the priority information of the at least one target slice;
and performing cell reselection based on the reselection priorities of the frequency points corresponding to the serving cell and each cell in the one or more adjacent cells.
2. The method of claim 1, wherein the priority information of the target slice comprises a priority of the target slice, and wherein the reselection priority of the frequency point is determined by a sum of priorities of one or more slices supported by the frequency point.
3. The method of claim 1, wherein the priority information of the target slice comprises priorities of the target slices on different frequency points, and the reselection priority of the frequency point is determined by a sum of priorities of one or more target slices supported by the frequency point on the frequency point.
4. The method of claim 1, wherein the priority information of the target slice comprises a priority of the target slice and priorities of the target slice on different frequency points, and the reselection priority of the frequency point is determined by priorities of one or more target slices supported by the frequency point and priorities of the one or more target slices on the frequency point, respectively.
5. The method of claim 4, wherein the determining the reselection priority for the frequency point according to the priority of the one or more target slices supported by the frequency point and the priority of the one or more target slices on the frequency point respectively comprises:
the reselection priority of the frequency point, the priority of one or more target slices supported by the frequency point and the priority of the one or more target slices at the frequency point respectively satisfy:
Figure FDA0003244926650000011
wherein, P F Representing the reselection priority of the frequency point F; n represents the number of the target slices supported by the frequency point F, and is an integer larger than or equal to 1; p (S) n ) Representing the priority of the nth slice in the N target slices supported by the frequency point F, wherein N is more than or equal to 1 and less than or equal to N, and is an integer; p (S) n And F) represents the priority of the nth slice on the frequency point F.
6. The method of any of claims 1-5, wherein the priority of the target slice comprises a priority value of the target slice, the priority value of the target slice being carried in a non-access stratum (NAS) message used to configure one or more slices for the terminal device.
7. The method of any of claims 1-5, wherein the priority of the target slice comprises a value corresponding to an ordering of the target slice in a non-access stratum (NAS) message used to configure one or more slices for the terminal device.
8. The method of any one of claims 1 to 5, wherein the priorities of the target slices on different frequency points comprise priority values of the target slices on different frequency points, and the priority values of the target slices on different frequency points are carried in a broadcast message or radio resource control dedicated signaling.
9. A communications apparatus, comprising:
an acquisition unit configured to acquire priority information of at least one target slice; the at least one target slice comprises one or more slices which are expected to be accessed by the terminal equipment in the slices supported by the frequency points respectively corresponding to the service cell and one or more adjacent cells of the terminal equipment, or one or more slices which are allowed to be accessed and configured to the terminal equipment by the network equipment, or one or more slices which are configured to the terminal equipment by an operator; the priority information of each target slice comprises the priority of each target slice and/or the priority of each target slice on different frequency points; a determining unit, configured to determine, based on the priority information of the at least one target slice, a reselection priority of a frequency point corresponding to each of the serving cell and the one or more neighboring cells;
and the cell reselection unit is configured to reselect the cell based on the reselection priorities of the frequency points corresponding to the serving cell and each of the one or more neighboring cells.
10. The apparatus of claim 9, wherein the priority information for the target slice comprises a priority of the target slice, and wherein the reselection priority for the frequency point is determined by a sum of priorities of one or more slices supported by the frequency point.
11. The apparatus of claim 9, wherein the priority information of the target slice comprises priorities of the target slices on different frequency points, and the reselection priority of the frequency point is determined by a sum of priorities of one or more target slices supported by the frequency point on the frequency point.
12. The apparatus of claim 9, wherein the priority information of the target slice comprises a priority of the target slice and priorities of the target slice on different frequency points, and the reselection priority of the frequency point is determined by priorities of one or more target slices supported by the frequency point and priorities of the one or more target slices on the frequency point, respectively.
13. The apparatus of claim 12, wherein the reselection priority for the frequency point and the priorities of the one or more target slices supported by the frequency point and the priorities of the one or more target slices at the frequency point respectively satisfy:
Figure FDA0003244926650000021
wherein, P F Indicating the reselection priority, P, of frequency point F F Is greater than 0; n represents the number of the target slices supported by the frequency point F, and is an integer larger than or equal to 1; p (S) n ) Representing the priority of the nth slice in the N target slices supported by the frequency point F, wherein N is more than or equal to 1 and less than or equal to N, and is an integer; p (S) n And F) represents the priority of the nth slice on the frequency point F.
14. The apparatus of any of claims 9-13, wherein the priority of the target slice comprises a priority value of the target slice, the priority value of the target slice being carried in a non-access stratum (NAS) message used to configure one or more slices for the terminal device.
15. The apparatus of any of claims 9-13, wherein the priority of the target slice comprises a value corresponding to an ordering of the target slice in a non-access stratum, NAS, message used to configure one or more slices for the terminal device.
16. The apparatus of any one of claims 9 to 13, wherein the priorities of the target slices on different frequency points comprise priority values of the target slices on different frequency points, and the priority values of the target slices on different frequency points are carried in a broadcast message or radio resource control dedicated signaling.
17. A communications device comprising a processor configured to perform the method of any of claims 1 to 8.
18. A computer-readable storage medium, comprising a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 8.
19. A computer program product, comprising a computer program which, when executed, causes a computer to perform the method of any one of claims 1 to 8.
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