A method and apparatus for wireless communication

Abstract

The application discloses a method and device for wireless communication. The first node receives first signaling, the first signaling indicates a network slice access layer group (NSAG) set for cell reselection for a first cell, the NSAG set does not include a first NSAG; the first NSAG is a NSAG used in performing a cell reselection process; in response to the NSAG set not including the first NSAG, first information is recorded; the first information includes information of performing a cell reselection process based on the first NSAG; a first report is sent, the first report includes the first information. The application reduces the time delay and power consumption of performing a network slice-based cell reselection process, improves the accuracy of performing a network slice-based cell reselection, and is beneficial to improving the efficiency of performing a network slice-based cell reselection process.

Description

A method and apparatus for wireless communication

[0001] This application claims priority to the Chinese Patent Application No. 202411068783.7, filed on August 5, 2024, and entitled "A method and apparatus for wireless communication", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to a method and apparatus in a wireless communication system, and more particularly, to a scheme and apparatus related to recording information of cell reselection based on network slices in a wireless communication system. BACKGROUND

[0003] SON (Self Organizing Network) includes self-configuration and self-optimization functions. Through the measurement reporting of UE (User Equipment) and the measurement analysis of the network itself, not only the automatic configuration and automatic connection of new nodes in the network can be realized, but also the parameter configuration and deployment planning of the network can be optimized, thereby improving the performance of the network.

[0004] In the traditional method, the operator needs to collect field wireless data through drive test for the optimization of mobile network performance, which inevitably brings great labor cost to the operator. With the development of SON, 3GPP (3rd Generation Partnership Project) studies and defines MDT (Minimization of Drive Test) as an improved solution to the traditional drive test method. In MDT, various UEs can measure and record specified data and independently report the recorded data to the network, thereby helping the operator to quickly optimize the network performance while reducing the maintenance cost. MDT includes the following two working modes: Immediate MDT and Logged MDT. Among them, Immediate MDT refers to the UE in RRC (Radio Resource Control) connected state reporting the recorded measurement results to the network immediately when the condition of triggering measurement recording is met; and Logged MDT refers to the UE in RRC idle state or RRC inactive state saving the recorded measurement results first when the condition of triggering measurement recording is met, and then reporting the measurement results to the network after entering the RRC connected state later.

[0005] 3GPP NR (New Radio) Release 17 introduces the feature of network slice based cell reselection, which aims to help the UE reselect to a cell that can support the network slice provided by the upper layer (such as UE NAS) of the UE, so that the UE can quickly obtain the service of the desired network slice after performing the network slice based cell reselection procedure. Before performing the network slice based cell reselection procedure, the UE needs to obtain the following information: NSAG (Network Slice AS Group) information for cell reselection from the core network, such as NSAG ID (Identity), network slice identity associated with the NSAG, TA information associated with the NSAG, and NSAG priority; and information for network slice based cell reselection from the access network, such as SIB (System Information Block) 16 message or RRC Release message. Based on the above information, in the process of performing cell reselection, the UE can consider the information of the NSAG supported by the frequency point when prioritizing the frequency points, and perceive the support of the neighboring cell for the NSAG (or the network slice associated with the NSAG). If the best cell or the highest ranked cell evaluated by the UE can support the NSAG used in the evaluation, the UE will reselect to the cell; if the best cell or the highest ranked cell evaluated by the UE does not support the NSAG used in the evaluation, the UE needs to prioritize the frequency points of the cell according to the NSAG supported by the cell, and reevaluate the best cell or the highest ranked cell, and in this case, if the cell does not support any NSAG, the UE will consider the priority of the frequency points of the cell to be the lowest. SUMMARY

[0006] The applicant has found through research that the existing SON / MDT mechanism does not consider recording and reporting for the network slice based cell reselection procedure, so that the network cannot analyze and optimize the related parameter configuration or deployment planning of the network slice based cell reselection, which is not conducive to improving the efficiency of the UE performing the network slice based cell reselection procedure.

[0007] To solve the above problems, a solution is disclosed in the present application. It should be noted that although a large number of embodiments of the present application are developed for the NR system, the present application is also applicable to other schemes, such as the LTE (Long-Term Evolution), LTE-A (Long-Term Evolution Advanced), 5G+ or 6G system scenario, and achieves similar technical effects to the NR system. Further, although the present application gives specific implementation for the SON / MDT mechanism, the present application can also be used for the AI (Artificial Intelligence) / ML (Machine Learning) mechanism, and achieves similar technical effects to the SON / MDT mechanism. Further, although the original intention of the present application is to target the Uu air interface, the present application can also be used for the PC5 interface, and achieves similar technical effects to the Uu air interface. Further, although the original intention of the present application is to target the UE and base station scenario, the present application is also applicable to the V2X (Vehicle-to-Everything) scenario, the communication scenario between the UE and the relay, and the communication scenario between the relay and the base station, and achieves similar technical effects to the UE and base station scenario. Further, although the original intention of the present application is to target the UE and base station scenario, the present application is also applicable to the NCR (Network Controlled Repeater), IAB (Integrated Access and Backhaul) or WAB (Wireless Access and Backhaul) communication scenario, and achieves similar technical effects to the UE and base station scenario. Further, although the original intention of the present application is to target the TN (Terrestrial Network) scenario, the present application is also applicable to the NTN (Non-Terrestrial Network) communication scenario, and achieves similar technical effects to the TN scenario. In addition, adopting a unified solution for different scenarios helps to reduce hardware complexity and cost. In the case of no conflict, the embodiments in any node of the present application and the features in the embodiments can be applied to any other node. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

[0008] When needed, the explanation of the terminology (Terminology) in the present application refers to the definition of the specification agreement TS38 series of 3GPP; or, refers to the definition of the specification agreement TS23 series of 3GPP; or, refers to the definition of the specification agreement TS24 series of 3GPP.

[0009] The application discloses a method used in a first node for wireless communication, and has the characteristics of comprising the following steps:

[0010] receiving first signaling, the first signaling indicating a network slice access layer group (NSAG) set for cell reselection for a first cell, the NSAG set not including a first NSAG; the first NSAG being a NSAG used in performing a cell reselection process;

[0011] in response to the NSAG set not including the first NSAG, recording first information; the first information including information based on performing the cell reselection process using the first NSAG;

[0012] sending a first report, the first report including the first information.

[0013] In the above method, the first node can record and report the first information in a targeted manner, thereby saving signaling overhead and reducing processing complexity. In addition, the above method is beneficial to assisting in optimizing parameter configuration or deployment planning of the network slice-based cell reselection process.

[0014] Specifically, according to one aspect of the application, the above method has the characteristics of comprising the following steps:

[0015] the first cell being a best cell in performing the cell reselection process based on the first NSAG;

[0016] or, the first cell being a highest-ranking cell in performing the cell reselection process based on the first NSAG;

[0017] or, the first cell being a camped cell after performing the cell reselection process based on the first NSAG.

[0018] The above aspect is beneficial to improving the efficiency of the first node in performing the network slice-based cell reselection process.

[0019] Specifically, according to one aspect of the application, the above method has the characteristics of comprising the following steps:

[0020] receiving second signaling, the second signaling indicating, in response to the NSAG set not including the first NSAG, recording the first information.

[0021] The above aspect is beneficial to the first node recording and reporting the first information based on network indication, thereby avoiding unnecessary signaling overhead and power consumption.

[0022] Specifically, according to one aspect of the application, the above method has the characteristics of the information based on performing the cell reselection process using the first NSAG being used to indicate at least one of the following:

[0023] The first NSAG is not included in the NSAG set;

[0024] information of the first cell;

[0025] information of the first NSAG.

[0026] The above aspects facilitate the flexibility of the first node recording the first information and the completeness of the content in the first information.

[0027] Specifically, according to an aspect of the present application, the above method is characterized in that the information that the second signaling indicates for performing the cell reselection procedure based on the first NSAG includes the content.

[0028] Through the above aspects, the first node can generate the first information according to specific needs, which is beneficial to assist the network to obtain the information of interest.

[0029] Specifically, according to an aspect of the present application, the above method is characterized in that the second signaling indicates at least one of the following:

[0030] Only when the first cell is a second cell, the information for performing the cell reselection procedure based on the first NSAG includes the information of the first cell;

[0031] Only when the first NSAG is a second NSAG, the information for performing the cell reselection procedure based on the first NSAG includes the information of the first NSAG.

[0032] The above aspects not only reduce the complexity and power consumption of the first node in processing, but also save signaling overhead.

[0033] The present application discloses a method used in a second node for wireless communication, characterized in that it comprises:

[0034] sending second signaling, the second signaling indicating that the response of the NSAG set of the first cell for cell reselection not including the first NSAG, the first node recording first information;

[0035] The first NSAG is an NSAG used by the first node in performing a cell reselection procedure; and the first information includes information for the first node to perform the cell reselection procedure based on the first NSAG.

[0036] The above method is beneficial to strengthen the control of the second node on the first node, so that the second node can obtain the first information, which is beneficial to the second node to analyze and optimize the parameter configuration or deployment planning of the cell reselection based on network slices.

[0037] Specifically, according to an aspect of the present application, the method is characterized in that comprising:

[0038] The first cell is a best cell in a cell reselection procedure based on the first NSAG;

[0039] Or, the first cell is a highest ranked cell in a cell reselection procedure based on the first NSAG;

[0040] Or, the first cell is a camped cell after a cell reselection procedure based on the first NSAG.

[0041] Specifically, according to an aspect of the present application, the method is characterized in that the information that the first node performs a cell reselection procedure based on the first NSAG, is used to indicate at least one of the following:

[0042] The first cell does not include the first NSAG in the NSAG set for cell reselection;

[0043] Information of the first cell;

[0044] Information of the first NSAG.

[0045] Specifically, according to an aspect of the present application, the method is characterized in that the second signaling indicates the content included in the information that the first node performs a cell reselection procedure based on the first NSAG.

[0046] The above aspect is beneficial for the second node to obtain information of interest, so as to adjust the parameter configuration or deployment planning of network slice-based cell reselection.

[0047] Specifically, according to an aspect of the present application, the method is characterized in that the second signaling indicates at least one of the following:

[0048] Only when the first cell is a second cell, the information that the first node performs a cell reselection procedure based on the first NSAG includes the information of the first cell;

[0049] Only when the first NSAG is a second NSAG, the information that the first node performs a cell reselection procedure based on the first NSAG includes the information of the first NSAG.

[0050] The above aspect is beneficial for reducing the complexity and power consumption of the second node in analyzing and optimizing the parameter configuration or deployment planning of network slice-based cell reselection.

[0051] The present application discloses a first node used for wireless communication, characterized in that comprising:

[0052] The first node comprises one or more processors and a memory;

[0053] The memory is coupled to the one or more processors, and the memory is configured to store computer program codes including computer instructions, and the one or more processors are configured to invoke the computer instructions to cause the first node to perform the method in the first node for wireless communication.

[0054] The present application discloses a second node for wireless communication, comprising:

[0055] The second node comprises one or more processors and a memory;

[0056] The memory is coupled to the one or more processors, and the memory is configured to store computer program codes including computer instructions, and the one or more processors are configured to invoke the computer instructions to cause the second node to perform the method in the second node for wireless communication. BRIEF DESCRIPTION OF DRAWINGS

[0057] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof as read in conjunction with the accompanying drawings:

[0058] Fig. 1 shows a flow chart of communication of a first node according to one embodiment of the present application;

[0059] Fig. 2 shows a schematic diagram of a network architecture according to one embodiment of the present application;

[0060] Fig. 3 shows a schematic diagram of an embodiment of a radio protocol architecture for the user and control planes according to one embodiment of the present application;

[0061] Fig. 4 shows a schematic diagram of a first communication device and a second communication device according to one embodiment of the present application;

[0062] Fig. 5 shows a flow chart of transmission between a first node N1 and a second node N2 according to one embodiment of the present application;

[0063] Fig. 6 shows a flow chart of determining that the first cell does not support the first NSAG in a case that the first cell is the best cell or the highest ranked cell based on performing a cell reselection procedure based on the first NSAG according to one embodiment of the present application;

[0064] Figure 7 shows a flow chart for determining that the first cell has no allocated resources for one or more network slices associated with the first NSAG, in a case where the first cell is the best cell or the highest ranked cell in a cell reselection procedure based on the first NSAG, according to an embodiment of the application;

[0065] Figure 8 shows a schematic diagram of recorded first information in a case where the first cell is the best cell or the highest ranked cell in a cell reselection procedure based on the first NSAG, according to an embodiment of the application;

[0066] Figure 9 shows a schematic diagram of recorded first information in a case where the first cell is a camped cell after a cell reselection procedure based on the first NSAG, according to an embodiment of the application;

[0067] Figure 10 shows a transmission flow chart for transmitting the first report by RRC messages and NAS messages in a case where the first cell is the best cell or the highest ranked cell in a cell reselection procedure based on the first NSAG, according to an embodiment of the application;

[0068] Figure 11 shows a structural block diagram of a processing apparatus for use in a first node, according to an embodiment of the application;

[0069] Figure 12 shows a structural block diagram of a processing apparatus for use in a second node, according to an embodiment of the application. DETAILED DESCRIPTION

[0070] The technical solutions of the present application will be further described below in conjunction with the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily without conflict. Based on performance, flexibility, complexity, overhead and compatibility, etc., the person skilled in the art has the motivation to flexibly combine the embodiments in different drawings without conflict, including but not limited to the embodiments in Figure 1 and the embodiments in Figures 5-10, the embodiments in Figure 5 and the embodiments in Figures 6-10, etc.

[0071] Embodiment 1

[0072] Embodiment 1 shows a flow chart for communication of a first node according to an embodiment of the application, as shown in Figure 1. In the first node 100 shown in Figure 1, each block represents a step.

[0073] In embodiment 1, the first node 100 receives, in step 101, first signaling indicating a set of network slice access stratum groups, NSAGs, for cell reselection for a first cell, the set of NSAGs not including a first NSAG; the first NSAG being an NSAG used in performing a cell reselection procedure; records, in step 102, first information in response to the set of NSAGs not including the first NSAG; the first information including information to perform the cell reselection procedure based on the first NSAG; and transmits, in step 103, a first report including the first information.

[0074] As one embodiment, the first signaling is an AS (Access Stratum) message.

[0075] As one sub-embodiment of the above embodiment, the first signaling is an RRC message.

[0076] As one sub-embodiment of the above embodiment, the first signaling is an RRC release message.

[0077] As one sub-embodiment of the above embodiment, the first signaling is a broadcast message.

[0078] As one sub-embodiment of the above embodiment, the first signaling is SIB16.

[0079] As one sub-embodiment of the above embodiment, the first signaling is SIB16 and an RRC release message.

[0080] As one embodiment, the first signaling is a NAS (Non Access Stratum) message.

[0081] As one sub-embodiment of the above embodiment, the first signaling is a Registration Accept message.

[0082] As one sub-embodiment of the above embodiment, the first signaling is a UE Configuration Update Command message.

[0083] As one sub-embodiment of the above embodiment, the first signaling is a Registration Accept message and a UE Configuration Update Command message.

[0084] As one embodiment, the first signaling includes an AS message and a NAS message.

[0085] As one embodiment, the first signaling comprises at least one of a broadcast message, an RRC message, and a groupcast message, and at least one of a registration accept message and a UE configuration update command message.

[0086] As one embodiment, the first NSAG is a NSAG used in evaluation.

[0087] As one embodiment, the first NSAG is a NSAG with the highest NSAG priority among NSAGs used by the first node to perform the cell reselection procedure.

[0088] As one embodiment, the first NSAG is a NSAG with the highest NSAG priority among NSAGs used by the first node to perform the cell reselection procedure, except for a NSAG used in evaluation.

[0089] As one sub-embodiment of the above embodiment, the above embodiment is applicable in a case where the first node does not measure any neighbor cell belonging to a frequency point supporting the NSAG used in evaluation.

[0090] As one sub-embodiment of the above embodiment, the above embodiment is applicable in a case where the first node measures a neighbor cell belonging to a frequency point supporting the NSAG used in evaluation, but the neighbor cell is not the best cell or is not the highest ranked cell.

[0091] As one embodiment, the first cell is a best cell in the cell reselection procedure based on the first NSAG.

[0092] As one embodiment, the first cell is a highest ranked cell in the cell reselection procedure based on the first NSAG.

[0093] As one embodiment, the first cell is a camped cell after the cell reselection procedure based on the first NSAG.

[0094] As one embodiment, the first node receives the first signaling in the first cell.

[0095] As one embodiment, the first node does not receive the first signaling in the first cell.

[0096] As one embodiment, the first signaling indicates a set of NSAGs for cell reselection for the first cell by indicating NSAG information of one or more NSAGs supported by the first cell for cell reselection.

[0097] As an embodiment, the first signaling indicating the NSAG set for cell reselection for the first cell means that the first signaling indicates NSAG information of one or more NSAGs for cell reselection in which there are available network slice resources in the first cell.

[0098] As an embodiment, the first signaling indicating the NSAG set for cell reselection for the first cell means that the first signaling indicates NSAG information of one or more NSAGs for cell reselection in which the first node can be supported by the first cell.

[0099] As an embodiment, the first signaling indicating the NSAG set for cell reselection for the first cell means that the first signaling indicates NSAG information of one or more NSAGs for cell reselection in which there are available network slice resources in the first cell.

[0100] As an embodiment, the response that the NSAG set does not include the first NSAG means that the response that the first cell does not support the first NSAG.

[0101] As an embodiment, the response that the NSAG set does not include the first NSAG means that the response that the first cell does not allocate resources for one or more network slices associated with the first NSAG.

[0102] As an embodiment, the information for performing the cell reselection procedure based on the first NSAG is used to indicate at least one of the following: the NSAG set does not include the first NSAG; information of the first cell; information of the first NSAG.

[0103] As an embodiment, the information for performing the cell reselection procedure based on the first NSAG includes information explicitly indicating that the NSAG set does not include the first NSAG. How to explicitly indicate that the NSAG set does not include the first NSAG is generally determined by the equipment supplier itself, for example, through bit information or enumeration value information, etc. Typically but not limited to, the information for performing the cell reselection procedure based on the first NSAG includes 1 bit information, indicating that the NSAG set does not include the first NSAG through the bit "0", and indicating that the NSAG set includes the first NSAG through the bit "1"; or, the information for performing the cell reselection procedure based on the first NSAG includes 1 enumeration value information (such as "Not support"), which is only included in the information for performing the cell reselection procedure based on the first NSAG in the case that the NSAG set does not include the first NSAG.

[0104] As an embodiment, the information of the first cell comprises at least one of: a zone identity of the first cell; cell signal information of the first cell; NSAG information of one or more NSAGs supported by the first cell.

[0105] As an embodiment, the information of the first NSAG comprises at least one of: NSAG information of the first NSAG; a zone identity of a cell supporting the first NSAG; cell signal information of a cell supporting the first NSAG.

[0106] As an embodiment, the information indicating to perform the cell reselection procedure based on the first NSAG is further used to implicitly indicate that the NSAG set does not comprise the first NSAG, in case that the information of the first cell or the information of the first NSAG is indicated.

[0107] As an embodiment, the zone identity of the cell comprises an identity of a zone where the cell is located.

[0108] As an embodiment, the identity of the zone comprises at least one of: a PLMN (Public Land Mobile Network) identity of the cell; a PNI-NPN (Public Network Integrated Non-Public Network) identity of the cell; a SNPN (Stand-alone Non-Public Network) identity of the cell; a CAG (Closed Access Group) identity of the cell; a TAI (Tracking Area Identity) of the cell; a TAC (Tracking Area Code) of the cell; a RANAC (RAN Area Code) of the cell.

[0109] As an embodiment, the zone identity of the cell comprises a cell identity of the cell.

[0110] As an embodiment, the cell identity comprises at least one of: a PCI (Physical Cell Identity) of the cell; a NCGI (NR Cell Global Identifier) of the cell.

[0111] As an embodiment, the area identity of the cell comprises an identity of an area where the cell is located and a cell identity of the cell.

[0112] Typically but not limitedly, the area identity of the cell comprises a PLMN of the cell and a NCGI of the cell.

[0113] Typically but not limitedly, the area identity of the cell comprises a SNPN of the cell, a TAC of the cell and a PCI of the cell.

[0114] Typically but not limitedly, the area identity of the cell comprises a PNI-NPN of the cell, a CAG identity of the cell and a PCI of the cell.

[0115] Typically but not limitedly, the area identity of the cell comprises a TAI of the cell, a RANAC of the cell and a NCGI of the cell.

[0116] As an embodiment, the cell signal information of the cell comprises cell signal quality information of the cell.

[0117] As an embodiment, the cell signal quality information of the cell comprises at least one of: a RSRP (Reference Signal Received Power) of the cell; a RSRQ (Reference Signal Received Quality) of the cell; a RSSI (Received Signal Strength Indicator) of the cell; a SNR (Signal to Noise Ratio) of the cell; a BER (Bit Error Rate) of the cell.

[0118] As an embodiment, the cell signal information of the cell comprises cell signal frequency point information of the cell.

[0119] As an embodiment, the cell signal frequency point information of the cell is an ARFCN (Absolute Radio Frequency Channel Number).

[0120] As an embodiment, the unit of the cell signal frequency point of the cell is Hz (Hertz).

[0121] As an embodiment, the cell signal frequency point information of the cell is an index value of a frequency point of the cell signal relative to a frequency point in a broadcast message of a cell where the first node resides.

[0122] Typically but not limitedly, the frequency point of the cell signal of the cell is F1, and the index value of the frequency point is 0, if the first node camps on the cell with the service frequency point F1.

[0123] Typically but not limitedly, the frequency point of the cell signal of the cell is F1, and the index value of the frequency point is 2, if F1 is the second configured frequency point in the SIB4 of the cell camped by the first node.

[0124] As an embodiment, the NSAG information includes at least one of the following: NSAG ID of the NSAG; network slice identifier associated with the NSAG, such as S-NSSAI (Single Network Slice Selection Assistance Information); TA information (such as TAI or TAC) associated with the NSAG; NSAG priority of the NSAG.

[0125] As an embodiment, the first report is sent through an RRC message.

[0126] As a sub-embodiment of the above-mentioned embodiment, the first report is an immediate MDT report.

[0127] As a sub-embodiment of the above-mentioned embodiment, the first report is MeasurementReport.

[0128] As a sub-embodiment of the above-mentioned embodiment, the first report is a log MDT report.

[0129] As a sub-embodiment of the above-mentioned embodiment, the first report is LogMeasReport.

[0130] As a sub-embodiment of the above-mentioned embodiment, the first report is RLF (Radio Link Failure)-Report.

[0131] As an embodiment, the first report is sent through a NAS message.

[0132] As a sub-embodiment of the above-mentioned embodiment, the first report is sent through a Registration Request message.

[0133] As a sub-embodiment of the above-mentioned embodiment, the first report is sent through a UE Configuration Update Complete message.

[0134] As one embodiment, the first report is a newly added report for network slice.

[0135] As one embodiment, the first report is a newly added report for network slice based cell reselection.

[0136] As one embodiment, the first report is a newly added report for NSAG priority for cell reselection.

[0137] As one embodiment, the first report is sent through RRC message and NAS message.

[0138] Embodiment 2

[0139] Embodiment 2 illustrates a schematic diagram of a network architecture according to one embodiment of the present application, as shown in FIG. 2.

[0140] FIG. 2 illustrates a network architecture 200. The network architecture 200 is a 5G NR (New Radio) / LTE (Long-Term Evolution) / LTE-A (Long-Term Evolution Advanced) system, or the network architecture 200 is a 5G+ network architecture, or the network architecture 200 is a 6G network architecture, or the network architecture 200 is a network architecture adopted in 3GPP future continued evolution; the network architecture 200 can be referred to as a 5GS (5G System) / EPS (Evolved Packet System), or the network architecture 200 can be referred to as a 6GS (6G System); the network architecture 200 includes a UE (User Equipment) 201, a RAN (Radio Access Network) 202, a core network 210, at least one of a HSS (Home Subscriber Server) / UDM (Unified Data Management) 220 and an Internet service 230. The network architecture 200 can be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As illustrated, the network architecture 200 provides packet-switched services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this application are amenable to use with networked or other wireless communication systems, providing circuit-switched service. The RAN includes a node 203. The RAN can also include other nodes 204. The node 203 provides user and control plane protocol terminations toward the UE 201. The node 203 can be connected to the other nodes 204 via an Xn interface (e.g., backhaul) / X2 interface. The node 203 can also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP (Transmit Receive Point), or some other suitable terminology. The core network 210 is a 5GC (5G Core Network) / EPC (Evolved Packet Core), or the core network 210 is a 6GC; the node 203 provides an access point to the core network 210 for the UE 201.Examples of UE 201 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aerial vehicles, narrowband internet of things devices, machine type communication devices, land vehicles, automobiles, wearable devices, or any other similar functional device. Those skilled in the art will also The node 203 is connected by an S1 / NG interface to the core network 210. The core network 210 includes a MME (Mobility Management Entity) / AMF (Access and Mobility Management Function) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, a S-GW (Service Gateway) / UPF (User Plane Function) 212, and a P-GW (Packet Data Network Gateway) / UPF 213, and other nodes not shown in FIG. 2. The MME / AMF / SMF 211 is a control node that handles signaling between the UE 201 and the core network 210. Generally, the MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transferred through the S-GW / UPF 212, which itself is connected to the P-GW / UPF 213. The P-GW / UPF 213 provides UE IP address allocation, among other functions. The P-GW / UPF 213 is connected to the Internet services 230. The Internet services 230 include operator- correspondent Internet protocol services, which can specifically include the Internet, intranet, IMS (IP Multimedia Subsystem), and packet-switched services.

[0141] As one embodiment, the first node comprises the UE 201.

[0142] As one embodiment, the second node comprises the node 203.

[0143] As one embodiment, the wireless link between the UE 201 and the node 203 comprises a cellular network link.

[0144] Embodiment 3

[0145] Embodiment 3 illustrates a schematic diagram of an embodiment of a radio protocol architecture for the user and control plane according to one embodiment of the application, as shown in Figure 3.

[0146] Embodiment 3 shows a schematic diagram of an embodiment of a user plane and control plane radio protocol architecture according to the present application, as shown in Figure 3. Figure 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for the user plane 350 and the control plane 300, Figure 3 shows the radio protocol architecture for the control plane 300 between a first communication node device (UE, gNB, RSU in V2X, MME or AMF) and a second communication node device (gNB, MME, AMF, UE or RSU in V2X), or between two UEs, in four layers: the Layer 1, Layer 2, Layer 3 and the NAS layer. The Layer 1 (L1 layer) is the lowest layer and implements various PHY (Physical layer) signal processing functions. The L1 layer will be referred to as the PHY 301 herein. The Layer 2 (L2 layer) 305 is above the PHY 301 and is responsible for the link between the first communication node device and the second communication node device, or between two UEs. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, a RLC (Radio Link Control) sublayer 303 and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate the functions of the second communication node device. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security functions, such as ciphering / de-ciphering of the data packets, and header compression. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell among the UEs. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in the Layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and the configuration of the lower layers using RRC signaling between the second communication node device and the first communication node device. The NAS (Non Access Stratum) sublayer in the control plane 300 is used for the transmission of non-access stratum signaling between the first communication node device and the second communication node device, which is transparent / invisible to the base station.The radio protocol architecture of the user plane 350 includes layer 1 (LI layer) and layer 2 (L2 layer) for the first and second communication node devices in the user plane 350 is generally the same for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. Also included in the L2 layer 355 in the user plane 350 is an SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping between QoS flows and data radio bearers (DRBs) to support diversity of services. Although not illustrated, the first communication node device can have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., a remote UE, a server, etc.).

[0147] As one embodiment, the radio protocol architecture in FIG. 3 is applicable to the first node.

[0148] As one embodiment, the radio protocol architecture in FIG. 3 is applicable to the second node.

[0149] As one embodiment, the higher layer in this application refers to layers above the physical layer.

[0150] As one embodiment, the first signaling is generated at the NAS sublayer 307.

[0151] As one embodiment, the first signaling is generated at the RRC sublayer 306.

[0152] As one embodiment, the first signaling is generated at the RRC sublayer 306 and NAS sublayer 307.

[0153] As one embodiment, the first signaling is generated at the MAC sublayer 302 or the MAC sublayer 352.

[0154] As one embodiment, the first signaling is generated at the MAC sublayer 302, the MAC sublayer 352, and the NAS sublayer 307.

[0155] As one embodiment, the first signaling is generated at the MAC sublayer 302, the MAC sublayer 352, and the RRC sublayer 306.

[0156] As one embodiment, the first signaling is generated in the PHY sublayer 301 or the PHY sublayer 351.

[0157] As one embodiment, the first signaling is generated in the PHY sublayer 301, either of the PHY sublayer 351 and the NAS sublayer 307.

[0158] As one embodiment, the first signaling is generated in the PHY sublayer 301, either of the PHY sublayer 351 and the RRC sublayer 306.

[0159] As one embodiment, the first information is generated in the NAS sublayer 307.

[0160] As one embodiment, the first information is generated in the RRC sublayer 306.

[0161] As one embodiment, the first information is generated in the RRC sublayer 306 and the NAS sublayer 307.

[0162] As one embodiment, the first information is generated in the MAC sublayer 302 or the MAC sublayer 352.

[0163] As one embodiment, the first information is generated in the MAC sublayer 302, either of the MAC sublayer 352 and the NAS sublayer 307.

[0164] As one embodiment, the first information is generated in the MAC sublayer 302, either of the MAC sublayer 352 and the RRC sublayer 306.

[0165] As one embodiment, the first information is generated in the PHY sublayer 301 or the PHY sublayer 351.

[0166] As one embodiment, the first information is generated in the PHY sublayer 301, either of the PHY sublayer 351 and the NAS sublayer 307.

[0167] As one embodiment, the first information is generated in the PHY sublayer 301, either of the PHY sublayer 351 and the RRC sublayer 306.

[0168] As one embodiment, the second signaling is generated in the RRC sublayer 306.

[0169] As one embodiment, the second signaling is generated in the MAC sublayer 302 or the MAC sublayer 352.

[0170] As one embodiment, the second signaling is generated in the MAC sublayer 302, either of the MAC sublayer 352 and the RRC sublayer 306.

[0171] As one embodiment, the second signaling is generated in the PHY 301 or the PHY 351.

[0172] As one embodiment, the second signaling is generated in any of the PHY sublayer 301, the PHY sublayer 351, and the RRC sublayer 306.

[0173] Embodiment 4

[0174] Embodiment 4 illustrates a schematic diagram of a first communication device and a second communication device according to one embodiment of the present application, as shown in FIG. 4. FIG. 4 is a block diagram of a first communication device 410 and a second communication device 450 communicating with each other in an access network.

[0175] The first communication device 410 includes a controller / processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multi-antenna receive processor 472, a multi-antenna transmit processor 471, a transmitter / receiver 418, and an antenna 420.

[0176] The second communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter / receiver 454, and an antenna 452.

[0177] In the transmission from the first communication device 410 to the second communication device 450, at the first communication device 410, upper layer packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements functionality of the L2 layer. In the DL (DownLink), the controller / processor 475 provides header compression, ciphering, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocations for the second communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the second communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the LI layer (i.e., physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 450, and constellation mapping based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial pre-coding of the coded and modulated symbols, including codebook-based and non-codebook-based pre-coding, and beamforming processing, generating one or more parallel streams. The transmit processor 416 then maps to each parallel stream to subcarriers, multiplexes the modulated symbols with reference signals (e.g., pilot) in time domain and / or frequency domain, and then performs an inverse fast Fourier transform (IFFT) to generate a time-domain OFDM stream. The multi-antenna transmit processor 471 then performs transmit analog pre-coding / beamforming operations on the time-domain multicarrier symbol streams. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides the radio frequency stream to the corresponding antenna 420.

[0178] In transmission from the first communication device 410 to the second communication device 450, at the second communication device 450, each receiver 454 receives a signal through its respective antenna 452. Each receiver 454 recovers information modulated onto an RF carrier and converts the RF stream into a baseband, multicarrier symbol stream to be provided to a receive processor 456. The receive processor 456 and a multiple access receive processor 458 implement various signal processing functions of the Ll layer. The multiple access receive processor 458 performs receive analog precoding / beamforming operations on the baseband, multicarrier symbol stream from the receivers 454. The receive processor 456 converts the baseband, multicarrier symbol stream from the receive analog precoding / beamforming operations from the time domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signals and the reference signals are demultiplexed by the receive processor 456, with the reference signals to be used for channel estimation and the data signals to be recovered after multi-antenna detection in the multiple access receive processor 458 for any parallel streams destined to the second communication device 450. The symbols on each parallel stream are demodulated and recovered in the receive processor 456 and generate soft decisions. The receive processor 456 then decodes and de-interleaves the soft decisions to recover the upper layer data and control signals transmitted by the first communication device 410 on the physical channels. The upper layer data and control signals are then provided to a controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 can be associated with a memory 460 that stores program codes and data. The memory 460 can be referred to as a computer-readable medium. In the DL, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer data packets from the core network. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals can also be provided to the L3 for L3 processing. The controller / processor 459 is also responsible for error detection using an acknowledgement (ACK) and / or negative acknowledgement (NACK) protocol to support HARQ operations.

[0179] In the transmission from the second communication device 450 to the first communication device 410, at the second communication device 450, a data source 467 is used to provide upper layer packets to a controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmit function described at the first communication device 410 in the DL, the controller / processor 459 implements header compression, ciphering, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocations for the first communication device 410, implements L2 layer functionality for the user plane and control plane. The controller / processor 459 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the first communication device 410. A transmit processor 468, in conjunction with a multi-antenna transmit processor 457, performs modulation mapping, channel coding processing, digital multi-antenna spatial processing, including codebook-based and non-codebook-based precoding, and beamforming processing, and then the transmit processor 468 generates parallel streams of symbols that are modulated onto different carriers, and the modulated symbol streams are then provided to different antennas 452 via transmitters 454 after analog precoding / beamforming at the multi-antenna transmit processor 457. Each transmitter 454 modulates a respective symbol stream, converts the modulated symbol stream from digital form to analog form, and transmits the analog signal via the corresponding antenna 452.

[0180] In the transmission from the second communication device 450 to the first communication device 410, the functionality at the first communication device 410 is similar to the functionality described in connection with the reception at the second communication device 450 in the transmission from the first communication device 410 to the second communication device 450. Each receiver 418 receives a signal from its respective antenna 420, converts the received signal to a baseband signal, and provides the baseband signal to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multi-antenna receive processor 472, in conjunction with the controller / processor 475, implement the L1 layer functions. The controller / processor 475 implements L2 layer functionality. The controller / processor 475 can be associated with a memory 476 that stores program codes and data. The memory 476 can be referred to as a computer-readable medium. The controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the second communication device 450. Upper layer packets from the controller / processor 475 can be provided to a core network. The controller / processor 475 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0181] As one embodiment, the second communication device 450 comprises: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the performance of the following actions. The second communication device 450 is caused to perform at least the following: receive first signaling indicating, for a first cell, a set of network slice access stratum groups, NSAGs, for cell reselection, the set of NSAGs not including a first NSAG; the first NSAG being an NSAG used in performing a cell reselection procedure; in response to the set of NSAGs not including the first NSAG, record first information; the first information comprising information based on performing the cell reselection procedure using the first NSAG; transmit a first report comprising the first information.

[0182] As one embodiment, the second communication device 450 comprises: a memory storing a program of computer readable instructions to produce performance of actions when executed by at least one processor, the actions comprising: receiving first signaling indicating, for a first cell, a set of network slice access stratum groups, NSAGs, for cell reselection, the set of NSAGs not including a first NSAG; the first NSAG being an NSAG used in performing a cell reselection procedure; in response to the set of NSAGs not including the first NSAG, recording first information; the first information comprising information based on performing the cell reselection procedure using the first NSAG; transmitting a first report comprising the first information.

[0183] As one embodiment, the first communication device 410 comprises: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the performance of the following actions. The first communication device 410 is caused to perform at least the following: transmit second signaling indicating that, in response to a set of NSAGs for a first cell for cell reselection not including a first NSAG, a first node records first information; wherein the first NSAG is an NSAG used by the first node in performing a cell reselection procedure; the first information comprising information based on performing the cell reselection procedure by the first node using the first NSAG.

[0184] As an embodiment, the first communication device 410 comprises: a memory storing a computer readable program of instructions which, when executed by at least one processor, causes actions comprising: sending a second signaling indicating a response that a set of NSAGs used for cell reselection by a first cell does not include a first NSAG, the first node recording first information; wherein the first NSAG is a NSAG used in a cell reselection procedure performed by the first node; the first information comprises information based on which the first node performs the cell reselection procedure using the first NSAG.

[0185] As an embodiment, the first node in the present application comprises the second communication device 450.

[0186] As an embodiment, the second node in the present application comprises the first communication device 410.

[0187] As an embodiment, part or all of {the antenna 452, the receiver 454, the receive processor 456, the multi-antenna receive processor 458, the controller / processor 459, the memory 460} are used to receive the first signaling; part or all of {the antenna 420, the transmitter 418, the transmit processor 416, the multi-antenna transmit processor 471, the controller / processor 475} are used to send the first signaling.

[0188] As an embodiment, part or all of {the multi-antenna receive processor 458, the controller / processor 459, the memory 460, the data source 467} are used to record the first information in response that a set of NSAGs used for cell reselection by a first cell does not include a first NSAG.

[0189] As an embodiment, part or all of {the antenna 420, the receiver 418, the receive processor 470, the multi-antenna receive processor 472, the controller / processor 475, the memory 476} are used to receive the first information in the first report.

[0190] As an embodiment, part or all of {the antenna 452, the receiver 454, the receive processor 456, the multi-antenna receive processor 458, the controller / processor 459, the memory 460} are used to receive the second signaling; part or all of {the antenna 420, the transmitter 418, the transmit processor 416, the multi-antenna transmit processor 471, the controller / processor 475} are used to send the second signaling.

[0191] Embodiment 5

[0192] Embodiment 5 illustrates a transmission flow chart between the first node N1 and the second node N2 according to an embodiment of the present application; as shown in FIG. 5. In FIG. 5, the first node N1 and the second node N2 are communication nodes for transmission over an air interface, and the third node N3 and the fourth node N4 are of the same node type as the second node N2. In FIG. 5, the steps in block F0 are optional. It should be noted that the sequence of the steps in FIG. 5 is only one specific implementation, and the sequence between the steps can be adjusted without conflict; for example, the first signaling can be sent before the second signaling, or the transmission times of the two overlap.

[0193] For the second node N2, the second signaling is sent in step S5200, indicating that the NSAG set used for cell reselection by the first cell does not include the first NSAG, and the first node records the first information.

[0194] For the first node N1, the second signaling is received in step S5100, indicating that the NSAG set used for cell reselection by the first cell does not include the first NSAG, and the first node records the first information.

[0195] In embodiment 5, the first NSAG is an NSAG used by the first node in a cell reselection process; and the first information includes information about the cell reselection process performed by the first node based on the first NSAG.

[0196] As an embodiment, the first node N1 and the second node N2 are a user equipment and an access network device (such as the RAN device in embodiment 2) respectively.

[0197] As an embodiment, the first node N1 and the second node N2 are a user equipment and a core network device (such as the core network device in embodiment 2) respectively.

[0198] As an embodiment, the user equipment is a terminal.

[0199] As an embodiment, the second node N2 is the access network device to which the first node N1 is most recently connected before performing the network slice-based cell reselection process.

[0200] Typically but not limitedly, before performing the network slice-based cell reselection process, the connected base station of the first node is gNB#1, the first node N1 is changed from RRC connected state to RRC idle state or RRC inactive state at gNB#1, and the second node N2 is gNB#1.

[0201] Typically but not limitedly, the first node is connected to base stations in turn gNB#1, gNB#2, the first node N1 changes from RRC connected state to RRC idle state or RRC inactive state at gNB#2, and the second node N2 is gNB#2.

[0202] As an embodiment, the information for the first node to perform the cell reselection procedure based on the first NSAG indicates at least one of: the NSAG set for cell reselection of the first cell does not include the first NSAG; information of the first cell; information of the first NSAG.

[0203] As an embodiment, the second signaling indicates the information for the first node to perform the cell reselection procedure based on the first NSAG includes.

[0204] Typically but not limitedly, the second signaling indicates that the information for the first node to perform the cell reselection procedure based on the first NSAG includes: indication information that the NSAG set for cell reselection of the first cell does not include the first NSAG, information of the first cell, and information of the first NSAG.

[0205] Typically but not limitedly, the second signaling indicates that the information for the first node to perform the cell reselection procedure based on the first NSAG includes: indication information that the NSAG set for cell reselection of the first cell does not include the first NSAG, information of the first cell, and information of the first NSAG.

[0206] As an embodiment, the second signaling indicates that the information for the first node to perform the cell reselection procedure based on the first NSAG includes at least one of: the information of the first cell only when the first cell is a second cell; and the information of the first NSAG only when the first NSAG is a second NSAG.

[0207] Typically but not limitedly, the second signaling indicates that the first information includes information of the first cell, i.e., information of the NCGI#1, when the first cell is NCGI#1.

[0208] Typically but not limitedly, the second signaling indicates that the first information includes information of the first NSAG, i.e., information of the NSAG#1, when the first NSAG is NSAG#1.

[0209] As an embodiment, the second signaling is an RRC message.

[0210] As an embodiment, the second signaling is an RRC Reconfiguration message.

[0211] As an embodiment, the second signaling is a LoggedMeasurementConfiguration message.

[0212] As an embodiment, the second signaling is a NAS message.

[0213] As an embodiment, the second signaling is a Registration Accept message.

[0214] As an embodiment, the second signaling is a UE Configuration Update Command message.

[0215] The above embodiments are advantageous for the network to strengthen the control of the first node N1, and are advantageous for the network to obtain the information of interest to analyze and optimize the parameter configuration or deployment planning for the cell reselection based on network slices.

[0216] For the third node N3, in step S5301, the first signaling is sent, which indicates a network slice access layer group NSAG set for cell reselection for the first cell, and the NSAG set does not include the first NSAG; the first NSAG is the NSAG used in performing the cell reselection process.

[0217] For the first node N1, in step S5101, the first signaling is received, which indicates a network slice access layer group NSAG set for cell reselection for the first cell, and the NSAG set does not include the first NSAG; the first NSAG is the NSAG used in performing the cell reselection process.

[0218] As an embodiment, the first node N1 and the third node N3 are a user equipment and an access network device (such as the RAN device in embodiment 2) respectively.

[0219] As an embodiment, the first node N1 and the third node N3 are a user equipment and a core network device (such as the core network device in embodiment 2) respectively.

[0220] As an embodiment, the user equipment is a terminal.

[0221] As an embodiment, the third node N3 and the second node N2 are the same node.

[0222] As an embodiment, the first node N1 is connected to a base station which is the same as a base station to which the first node N1 receives the first signaling before performing the cell reselection procedure based on the network slice.

[0223] As an embodiment, the third node N3 and the second node N2 are two different nodes.

[0224] As an embodiment, the first node N1 is connected to a base station which is different from a base station to which the first node N1 receives the first signaling before performing the cell reselection procedure based on the network slice.

[0225] As an embodiment, the first cell is a best cell in performing the cell reselection procedure based on the first NSAG.

[0226] As an embodiment, the first cell is a highest ranked cell in performing the cell reselection procedure based on the first NSAG.

[0227] In the above two embodiments, the network can obtain information of the first cell in performing the cell reselection procedure based on the network slice and / or information of the first NSAG, which is beneficial for the network to adjust network planning and parameter configuration, so that the first node N1 can quickly reselect to a cell supporting a NSAG with the highest NSAG priority, and avoid processing delay and power consumption caused by reordering of frequency points.

[0228] As an embodiment, the first cell is a camped cell after performing the cell reselection procedure based on the first NSAG.

[0229] In the above embodiment, the network can obtain information of the first node performing the cell reselection procedure based on the network slice, and information of a camped cell after performing the cell reselection procedure based on the network slice, which is beneficial for the network to adjust network planning and parameter configuration, so that the first node N1 can avoid reselecting to a cell which does not support a NSAG used in performing the cell reselection procedure based on the network slice.

[0230] As an embodiment, the first node N1 receives the first signaling in the first cell.

[0231] As an embodiment, the first cell is managed by the third node N3.

[0232] As an embodiment, the first node N1 does not receive the first signaling in the first cell.

[0233] As one embodiment, the first cell is not managed by the third node N3.

[0234] As one embodiment, the first signaling comprises an AS message.

[0235] As one embodiment, the first signaling comprises an SIB16 message, and a FreqPriorityListSlicing information element in the SIB16 message indicates NSAG information of one or more NSAGs supported by the first cell or a frequency of the first cell for cell reselection.

[0236] As one embodiment, the first signaling comprises an RRC release message, and a FreqPriorityListDedicatedSlicing information element in the RRC release message indicates NSAG information of one or more NSAGs supported by a frequency of the first cell for cell reselection.

[0237] As one embodiment, the first signaling comprises a NAS message.

[0238] As one embodiment, the first signaling comprises a registration accept message, and an NSAG Information information element in the registration accept message indicates NSAG information of the first node N1 for cell reselection.

[0239] As one sub-embodiment of the above embodiment, an S-NSSAI Location Validity Information information element in the registration accept message can further indicate one or more network slices (such as S-NSSAI) to which the first cell allocates resources for the first node N1.

[0240] As one embodiment, the first signaling comprises a UE configuration update command message, and an NSAG Information information element in the UE configuration update command message indicates latest NSAG information of the first node N1 for cell reselection.

[0241] As one sub-embodiment of the above embodiment, an S-NSSAI Location Validity Information information element in the UE configuration update command message can further indicate one or more network slices (such as S-NSSAI) to which the first cell newly allocates resources for the first node N1.

[0242] For the first node N1, it is determined in step S5102 that the NSAG set does not include the first NSAG; in step S5103, first information is recorded in response to the NSAG set not including the first NSAG; the first information includes information for performing a cell reselection procedure based on the first NSAG; and in step S5104, a first report is sent.

[0243] For the fourth node N4, the first report is received in step S5401.

[0244] As an embodiment, the first node N1 and the fourth node N3 are a user equipment and an access network device (for example, the RAN device in embodiment 2) respectively.

[0245] As an embodiment, the first node N1 and the fourth node N3 are a user equipment and a core network device (for example, the core network device in embodiment 2) respectively.

[0246] As an embodiment, the user equipment is a terminal.

[0247] As an embodiment, the fourth node includes an access network device and a core network device.

[0248] As an embodiment, the fourth node N4 and the second node N2 are the same node.

[0249] As an embodiment, the service base station that sends the first report after the first node N1 resumes the RRC connected state is the base station to which the first node N1 is connected before performing the cell reselection procedure based on network slices, and the fourth node N4 and the second node N2 are the same base station.

[0250] As an embodiment, the fourth node N4 and the third node N3 are the same node.

[0251] As an embodiment, the service base station that sends the first report after the first node N1 resumes the RRC connected state is the base station to which the cell in which the first node N1 receives the first signaling belongs, and the fourth node N4 and the third node N3 are the same base station.

[0252] As an embodiment, the fourth node N4 and the second node N2 and the third node N3 are the same node.

[0253] As an embodiment, the serving base station that transmits the first report after the first node N1 resumes the RRC connected state is the same as the base station to which the first node N1 is connected before performing the network slice based cell reselection procedure, and the base station to which the camped cell belongs that transmits the first signaling is the same as the base station to which the first node N1 is connected before performing the network slice based cell reselection procedure.

[0254] As an embodiment, the fourth node N4 and the second node N2 are two different nodes; in this embodiment, the second node N2 and the third node N3 can be the same node or two different nodes.

[0255] As an embodiment, the fourth node N4 and the third node N3 are two different nodes; in this embodiment, the third node N3 and the second node N2 can be the same node or two different nodes.

[0256] As an embodiment, the fourth node N4, the third node N3 and the second node N2 are all different nodes.

[0257] As an embodiment, the serving base station that transmits the first report after the first node N1 resumes the RRC connected state is different from the base station to which the first node N1 is connected before performing the network slice based cell reselection procedure; the serving base station that transmits the first report after the first node N1 resumes the RRC connected state is different from the base station to which the camped cell belongs that transmits the first signaling; the base station to which the first node N1 is connected before performing the network slice based cell reselection procedure is different from the base station to which the camped cell belongs that transmits the first signaling.

[0258] As an embodiment, the first node N1 determines that the first NSAG is not included in the NSAG set based on the first signaling received in S5101, that is, determines that the first cell does not support the first NSAG, or determines that the first cell does not allocate resources for one or more network slices associated with the first NSAG.

[0259] As an embodiment, in response to the NSAG set not including the first NSAG, recording the first information means that the first node N1 records the first information in a case where it is determined that the first cell does not support the first NSAG.

[0260] As an embodiment, in response to the NSAG set not including the first NSAG, recording the first information means that the first node N1 records the first information in a case where it is determined that the first cell does not allocate resources for one or more network slices associated with the first NSAG.

[0261] As an embodiment, the content recorded in the first information is determined by the first node N1 itself.

[0262] As an embodiment, the content recorded in the first information by the first node N1 is determined according to the second signaling received from the second node N2 in S5100.

[0263] As an embodiment, in the case that the content recorded in the first information is determined by the first node N1 itself and the content recorded in the first information is also specified by the second node N2 to the first node N1 through the second signaling, the first node N1 takes the content recorded in the first information indicated by the second signaling as the criterion.

[0264] As an embodiment, in the case that the content recorded in the first information is determined by the first node N1 itself and the content recorded in the first information is also specified by the second node N2 to the first node N1 through the second signaling, the first node N1 takes the content recorded in the first information determined by itself as the criterion.

[0265] As an embodiment, the first information is contained in the first report.

[0266] As an embodiment, a first field of the first report indicates the first information.

[0267] As an embodiment, the first field of the first report includes at least one of the following subfields: indication information that the NSAG set does not include the first NSAG; information of the first cell; information of the first NSAG.

[0268] As an embodiment, the first information is contained in a first variable of the first report.

[0269] As an embodiment, a second field in the first variable of the first report indicates the first information.

[0270] As an embodiment, a second field in the first variable of the first report is set as the first information.

[0271] As an embodiment, the second field in the first variable of the first report corresponds to the first field of the first report.

[0272] As an embodiment, the second field in the first variable of the first report includes at least one of the following subfields: indication information that the NSAG set does not include the first NSAG; information of the first cell; information of the first NSAG.

[0273] As an embodiment, the first report sent by the first node contains the first information recorded in the first variable of the first report.

[0274] As an embodiment, the first variable of the first report is VarLogMeasReport.

[0275] As an embodiment, the first variable of the first report is VarMeasIdleReport.

[0276] As an embodiment, the first variable of the first report is VarMeasReportList.

[0277] As an embodiment, the first variable of the first report is VarRLF-Report.

[0278] As an embodiment, the first variable of the first report is a variable newly added for network slices.

[0279] As an embodiment, the first variable of the first report is a variable newly added for network slice-based cell reselection.

[0280] As an embodiment, the first report is sent by the first node N1 to the fourth node N4 after recording the first information.

[0281] As an embodiment, the first report is sent by the first node N1 to the fourth node N4 immediately after the fourth node N4 resumes to the RRC connected state after recording the first information.

[0282] As an embodiment, the first report is sent by the first node N1 to the fourth node N4 after waiting for the expiration of the first timer after the fourth node N4 resumes to the RRC connected state after recording the first information.

[0283] As an embodiment, the first timer can be determined by the first node N1 itself, or configured to the first node N1 by the second node N2 or the fourth node N4.

[0284] As an embodiment, in the case that the first timer is determined by the first node N1 itself and the first timer is also configured to the first node N1 by the second node N2 or the fourth node N4, the first node N1 takes the first timer configured by the second node N2 or the fourth node N4 as the standard.

[0285] As an embodiment, in the case that the first node N1 determines the first timer by itself and the second node N2 or the fourth node N4 configures the first timer for the first node N1 as well, the first node N1 takes the first timer determined by itself as the criterion.

[0286] As an embodiment, the first report is sent by the first node N1 to the fourth node N4 in response to a network request for obtaining the first information after the first node N1 records the first information.

[0287] As an embodiment, the first report is sent by the first node N1 to the fourth node N4 immediately after the first node N1 receives a network request for obtaining the first information.

[0288] As an embodiment, the first report is sent by the first node N1 to the fourth node N4 after the first node N1 waits for a second timer to expire after receiving a network request for obtaining the first information.

[0289] As an embodiment, the second timer can be determined by the first node N1 by itself or configured by the fourth node N4 for the first node N1.

[0290] As a sub-embodiment of the above-mentioned embodiment, in the case that the first node N1 determines the second timer by itself and the fourth node N4 configures the second timer for the first node N1 as well, the first node N1 takes the second timer configured by the fourth node N4 as the criterion.

[0291] As a sub-embodiment of the above-mentioned embodiment, in the case that the first node N1 determines the second timer by itself and the fourth node N4 configures the second timer for the first node N1 as well, the first node N1 takes the second timer determined by itself as the criterion.

[0292] As an embodiment, the first report is sent through an RRC message.

[0293] As an embodiment, the first report is sent through an NAS message.

[0294] As an embodiment, the first report is sent through an RRC message and an NAS message.

[0295] Embodiment 6

[0296] Embodiment 6 illustrates a flowchart of determining that the first cell does not support the first NSAG in a case that the first cell is the best cell or the highest ranked cell in a cell reselection procedure based on the first NSAG according to an embodiment of the present application, as shown in FIG. 6.

[0297] For the first node, the NSAG information of the first NSAG is determined in step S601 according to the NAS message.

[0298] As an embodiment, the first node learns the NSAG information of one or more NSAGs for cell reselection based on the NSAG Information IE in the registration accept message.

[0299] As an embodiment, the first node learns the NSAG information of one or more NSAGs for cell reselection based on the NSAG Information IE in the UE configuration update command message.

[0300] As an embodiment, the NSAG information includes at least one of NSAG ID, associated one or more S-NSSAIs, associated TA information and NSAG priority.

[0301] As an embodiment, the NAS of the first node determines the NSAG for the first node to perform cell reselection according to one or more network slices for cell reselection and the NSAG information of one or more NSAGs for cell reselection.

[0302] As an embodiment, the NAS of the first node indicates the NSAG information of the NSAG for the first node to perform cell reselection to the AS of the first node.

[0303] As an embodiment, the NAS of the first node indicates the NSAG information of one or more NSAGs for cell reselection to the AS of the first node.

[0304] As an embodiment, the NAS of the first node determines one or more network slices for cell reselection and indicates the information of the network slices to the AS of the first node.

[0305] As an embodiment, the AS of the first node determines the NSAG for the first node to perform cell reselection according to the information of the network slices (such as S-NSSAIs) indicated by the NAS of the first node and the NSAG information of one or more NSAGs for cell reselection (such as associated one or more S-NSSAIs).

[0306] For the first node, in step S602, the first node determines, according to the AS message, NSAG information of the NSAG supported by the first cell for cell reselection.

[0307] As an embodiment, the first node determines, according to a FreqPriorityListSlicing information element in a SIB16 message, the NSAG information of the NSAG supported by the first cell for cell reselection.

[0308] As an embodiment, the AS of the first node determines, according to a dl-ImplicitCarrierFreq-r17 information element and a nsag-IdentityInfo-r17 information element in the FreqPriorityListSlicing information element, the NSAG information of the NSAG supported by the frequency point of the first cell for cell reselection; in this embodiment, the NSAG supported by the frequency point of the first cell for cell reselection is the NSAG supported by the first cell for cell reselection.

[0309] As a sub-embodiment of the above-mentioned embodiment, the AS of the first node determines, according to the dl-ImplicitCarrierFreq-r17 information element, the nsag-IdentityInfo-r17 information element and a sliceCellListNR-r17 information element in the FreqPriorityListSlicing information element, the NSAG information of the NSAG supported by the first cell for cell reselection.

[0310] As an embodiment, the first node determines, according to a FreqPriorityListDedicatedSlicing information element in an RRC release message, the NSAG information of the NSAG supported by the first cell for cell reselection.

[0311] As a sub-embodiment of the above-mentioned embodiment, the AS of the first node determines, according to a dl-ExplicitCarrierFreq-r17 information element and a nsag-IdentityInfo-r17 information element in the FreqPriorityListDedicatedSlicing information element, the NSAG information of the NSAG supported by the frequency point of the first cell for cell reselection; in this embodiment, the NSAG supported by the frequency point of the first cell for cell reselection is the NSAG supported by the first cell for cell reselection.

[0312] For the first node, in step S603, the first node determines, according to the information of the NSAG supported by the first cell, that the first cell does not support the first NSAG.

[0313] As an embodiment, the first node determines that the NSAG ID of the first NSAG does not belong to the one or more NSAG IDs supported by the first cell according to the one or more NSAG IDs supported by the first cell, so that the first node can determine that the first cell does not support the first NSAG.

[0314] Typically but not limitedly, the AS of the first node determines that the NSAG ID and the associated TAC of the first NSAG do not belong to the NSAG ID and the associated TAC supported by the first cell according to the nsag-ID-r17 and the trackingAreaCode-r17 supported by the first cell, so that the AS of the first node can determine that the first cell does not support the first NSAG.

[0315] As an embodiment, the first node determines that the NSAG ID and the associated TAC of the first NSAG do not belong to the one or more NSAG IDs and the associated TAC supported by the first cell according to the one or more NSAG IDs and the associated TAC supported by the first cell, so that the first node can determine that the first cell does not support the first NSAG.

[0316] Typically but not limitedly, the AS of the first node determines that the NSAG ID and the associated TAC of the first NSAG do not belong to the NSAG ID and the associated TAC supported by the first cell according to the nsag-ID-r17 and the trackingAreaCode-r17 supported by the first cell, so that the AS of the first node can determine that the first cell does not support the first NSAG.

[0317] Typically but not limitedly, the first node determines that the first NSAG is NSAG#3 in TAC#2, and the NSAG information of the NSAG supported by the first cell includes NSAG#3 in TAC#1 but does not include NSAG#3 in TAC#2, so that the first node can determine that the first cell does not support the first NSAG.

[0318] As an embodiment, the NAS of the first node determines that the first cell does not support the first NSAG according to the indication information of the AS of the first node. Typically but not limitedly, the information indicating that the first cell does not support the first NSAG can be direct indication bit information (such as "0") or enumeration value information (such as "Not support"), or indirect indication of nsag-ID-r17 and / or trackingAreaCode-r17 supported by the first cell.

[0319] Embodiment 7

[0320] Embodiment 7 illustrates a flowchart of determining that the first cell has no allocated resource for one or more network slices associated with the first NSAG in case that the first cell is the best cell or the highest ranked cell in the cell reselection procedure based on the first NSAG according to an embodiment of the present application, as shown in FIG. 7.

[0321] For the first node, in step S701, the NSAG information of the first NSAG is determined according to the NAS message.

[0322] As an embodiment, how the first node determines the NSAG information of the first NSAG according to the NAS message, please refer to the method of step S601 in embodiment 6.

[0323] For the first node, in step S702, the NS-AoS (Network Slice Area of Service) information of one or more network slices associated with the first NSAG is determined according to the NAS message.

[0324] As an embodiment, the first node determines the NS-AoS information of one or more network slices associated with the first NSAG based on the NSAG Information IE and the S-NSSAI Location Validity Information IE in the registration accept message.

[0325] As an embodiment, the NAS of the first node determines the NS-AoS information of one or more network slices associated with the first NSAG through the S-NSSAI Location Validity Information IE.

[0326] As an embodiment, the NAS of the first node indicates the determined NS-AoS information of one or more network slices associated with the first NSAG to the AS of the first node.

[0327] As an embodiment, the AS of the first node determines the NS-AoS information of one or more network slices associated with the first NSAG based on the information in the S-NSSAI Location Validity Information IE indicated by the NAS of the first node.

[0328] Typically but not limitedly, the first NSAG is associated with network slices Slice#1, Slice#2, and the S-NSSAI Location Validity Information information element indicates the NS-AoS information of Slice#2, then the NS-AoS information of one or more network slices associated with the first NSAG includes the NS-AoS information of Slice#2.

[0329] For the first node, in optional step S703, it determines that the first cell supports the first NSAG according to the AS message.

[0330] As an embodiment, how the first node determines that the first cell supports the first NSAG according to the AS message, please refer to the method in steps S602 and S603 in embodiment 6, the difference is that step S603 determines that the first cell does not support the first NSAG, and this embodiment determines that the first cell supports the first NSAG.

[0331] For the first node, in step S704, it determines that the NS-AoS information does not include the information of the first cell according to the measurement result.

[0332] As an embodiment, the first node determines that the cell identity in the NS-AoS information does not include the cell identity of the first cell according to the measurement result in the cell reselection process, and the NS-AoS information of one or more network slices associated with the first NSAG, so that the first node determines that the first cell does not allocate resources for one or more network slices associated with the first NSAG.

[0333] As an embodiment, the NAS of the first node determines that the NS-AoS information of one or more network slices associated with the first NSAG does not include the identity of the first cell according to the cell identity of the first cell indicated by the AS of the first node, so as to determine that the first cell does not allocate resources for one or more network slices associated with the first NSAG.

[0334] As an embodiment, the AS of the first node determines that the NS-AoS information of one or more network slices associated with the first NSAG does not include the identity of the first cell according to the cell identity of the first cell, and the NS-AoS information of one or more network slices associated with the first NSAG, so as to determine that the first cell does not allocate resources for one or more network slices associated with the first NSAG.

[0335] Typically but not limitedly, the first node measures a cell identity of the first cell as NCGI#1, the NS-AoS information of one or more network slices associated with the first NSAG does not include NCGI#1, and the first node determines that the first cell has no allocated resource for the one or more network slices associated with the first NSAG.

[0336] Embodiment 8

[0337] Embodiment 8 illustrates a schematic diagram of the recorded first information in the case that the first cell is the best cell or the highest ranked cell in the cell reselection procedure based on the first NSAG according to an embodiment of the present application, as shown in FIG. 8.

[0338] In Embodiment 8, the first node determines that the first cell is the best cell or the highest ranked cell in the cell reselection procedure based on the frequency point supporting the first NSAG.

[0339] As an embodiment, the first node records the first information in response to that the first cell does not support the first NSAG or the first cell has no allocated resource for the one or more network slices associated with the first NSAG.

[0340] As an embodiment, the first information includes information indicating that the NSAG set does not include the first NSAG, information of the first cell, and information of the first NSAG.

[0341] Typically but not limitedly, the first information includes information indicating that the NSAG set does not include the first NSAG, a zone identity of the first cell, cell signal information of the first cell, a zone identity of a cell supporting the first NSAG, and cell signal information of a cell supporting the first NSAG.

[0342] Typically but not limitedly, the first information includes a bit value “0” indicating that the first cell does not support the first NSAG, an NCGI of the first cell, an RSRP of the first cell, an NCGI of a cell supporting the first NSAG, and an RSRP of a cell supporting the first NSAG.

[0343] Typically but not limitedly, the first information includes a bit value “0” indicating that the first cell has no allocated resource for the one or more network slices associated with the first NSAG, an NSAG ID of the first NSAG, and one or more NSAG IDs supported by the first cell.

[0344] Typically but not limitedly, the first information is an enumerated value "Not support" indicating that the first cell does not support the first NSAG, an NSAG ID of the first NSAG, an NSAG priority of the NSAG ID of the first NSAG, one or more NSAG IDs supported by the first cell, and an NSAG priority of one or more NSAGs supported by the first cell.

[0345] As an embodiment, the first node sends the first report to the fourth node through an RRC message; and the fourth node is an access network device.

[0346] As an embodiment, the network adjusts the transmission power of the first cell and / or the cell supporting the first NSAG based on the first information.

[0347] As an embodiment, the network adjusts the value of the transmission power of the first cell to be lower than the value of the transmission power of the cell supporting the first NSAG.

[0348] The above embodiments can help the network optimize the transmission power of the cell in the network deployment, so that the first node can evaluate the cell supporting the first NSAG as the best cell or the highest ranked cell in the network slice-based cell reselection process, thereby enabling the first node to quickly reselect to the cell supporting the NSAG with the highest NSAG priority, avoiding the processing delay and power consumption caused by the frequency point reordering of the first cell.

[0349] As an embodiment, the first node sends the first report to the fourth node through an NAS message; and the fourth node is a core network device.

[0350] As an embodiment, the network adjusts the NSAG priority of the first NSAG and the NSAG priority of one or more NSAGs supported by the first cell based on the first information.

[0351] As an embodiment, the network adjusts the value of the NSAG priority of the first NSAG to be lower than the value of the NSAG priority of one or more NSAGs supported by the first cell.

[0352] The above embodiments can help the network optimize the NSAG priority of the NSAG for cell reselection, so that the first node can take the NSAG supported by the first cell as a new first NSAG in the network slice-based cell reselection process, thereby enabling the first node to quickly reselect to the cell supporting the NSAG with the highest NSAG priority, avoiding the processing delay and power consumption caused by the frequency point reordering of the first cell.

[0353] Embodiment 9

[0354] Embodiment 9 illustrates a schematic diagram of the recorded first information in the case that the first node reselects to the first cell after performing the cell reselection procedure based on the first NSAG according to an embodiment of the present application, as shown in FIG. 9.

[0355] In embodiment 9, the first node reselects to the first cell after performing the cell reselection procedure based on the frequency point supporting the first NSAG.

[0356] As an embodiment, the first node determines that the first cell does not support the first NSAG through the NAS message.

[0357] As an embodiment, the first node determines that the first cell does not support the first NSAG according to the Rejected NSSAI information element in the registration accept message or the registration reject message.

[0358] As an embodiment, the first node determines that the S-NSSAI indicated in the Rejected NSSAI is associated with the first NSAG according to the NSAG information for cell reselection, and thus determines that the first cell does not support the first NSAG.

[0359] As an embodiment, the first node determines that the first cell does not support the first NSAG through the AS message and the NAS message.

[0360] As an embodiment, the first node learns the NSAG identifier for random access from the SIB1 message.

[0361] As an embodiment, the first node determines that the first cell does not support the first NSAG according to the NSAG information for random access and the NSAG information for cell reselection indicated in the registration accept message or the UE configuration update command message.

[0362] As an embodiment, the first node determines one or more network slices supported by the first cell according to the NSAG ID for random access indicated in the SIB1, and the NSAG information for random access indicated in the registration accept message or the UE configuration update command message; and determines that the one or more network slices are not associated with the first NSAG according to the one or more network slices and the NSAG information for cell reselection indicated in the registration accept message or the UE configuration update command, and thus determines that the first cell does not support the first NSAG.

[0363] As one embodiment, the first node determines that the first cell has no allocated resource for one or more network slices associated with the first NSAG through the AS message and the NAS message.

[0364] As one embodiment, the first node learns the cell identity of the first cell from the SIB1 message.

[0365] As one embodiment, the first node determines that the first cell has no allocated resource for one or more network slices associated with the first NSAG according to the NSAG Information and the S-NSSAI Location Validity Information indicated in the registration accept message or the UE configuration update command message.

[0366] As one embodiment, the first node determines the NS-AoS information of one or more S-NSSAI associated with the first NSAG according to the one or more S-NSSAI associated with the first NSAG and the S-NSSAI Location Validity Information; and determines that the NS-AoS information of the one or more S-NSSAI associated with the first NSAG does not include the cell identity of the first cell according to the cell identity of the first cell indicated in the SIB1, and thus determines that the first cell has no allocated resource for one or more network slices associated with the first NSAG.

[0367] As one embodiment, the first node records the first information in response to that the first cell does not support the first NSAG or the first cell has no allocated resource for one or more network slices associated with the first NSAG.

[0368] As one embodiment, the first information is information indicating that the NSAG set does not include the first NSAG, the information of the first cell and the information of the first NSAG.

[0369] As one embodiment, the first information is a bit value "0" indicating that the first cell does not support the first NSAG, the NCGI of the first cell, the frequency point to which the first cell belongs and the NSAG ID of the first NSAG.

[0370] As an embodiment, the first information is an enumerated value "Not available" indicating that the first cell has no allocated resource for one or more network slices associated with the first NSAG, the NCGI of the first cell, a frequency to which the first cell belongs, a NSAG ID of the first NSAG, and a TAI / TAC associated with the first NSAG.

[0371] As an embodiment, the first node sends the first report to the fourth node through an RRC message; and the fourth node is an access network device.

[0372] As an embodiment, the network adjusts the parameter configuration in the broadcast message based on the first information.

[0373] As an embodiment, the fourth node adjusts the parameter configuration in SIB16 based on the first information.

[0374] As an embodiment, the fourth node optimizes the parameter configuration of the nsag-IdentityInfo-r17 information element and the corresponding sliceCellListNR-r17 information element in SIB16 according to the first information.

[0375] As an embodiment, the network adjusts the allocation of cell resources based on the first information.

[0376] As an embodiment, the first cell allocates available resources for each network slice associated with the first NSAG.

[0377] The above embodiments can help the network optimize the broadcast parameter configuration or network resource allocation based on network slice cell reselection, thereby avoiding the first node reselecting to a cell that cannot support the first NSAG after performing the cell reselection process based on the first NSAG, and improving the accuracy of the first node performing the network slice-based cell reselection process.

[0378] Embodiment 10

[0379] Embodiment 10 illustrates a transmission flowchart of the first report sent through RRC messages and NAS messages when the first cell is the best cell or the highest ranked cell in the cell reselection process based on the first NSAG according to an embodiment of the present application, as shown in FIG. 10.

[0380] In embodiment 10, the best cell or the highest ranked cell evaluated by the first node in the cell reselection process based on the frequency supporting the first NSAG is the first cell.

[0381] For the first node, in step S10101, a response that the first cell does not support the first NSAG or the first cell has no allocated resource for one or more network slices associated with the first NSAG, the first information is recorded.

[0382] As an embodiment, the first information is information indicating that the NSAG set does not include the first NSAG, information of the first cell and information of the first NSAG.

[0383] As an embodiment, the first information includes first sub-information and second sub-information.

[0384] As an embodiment, the first sub-information is information indicating that the NSAG set does not include the first NSAG, a region identifier of the first cell, cell signal information of the first cell, a region identifier of a cell supporting the first NSAG and cell signal information of a cell supporting the first NSAG.

[0385] As an embodiment, the second sub-information is information indicating that the NSAG set does not include the first NSAG, NSAG information of the first NSAG and NSAG information of one or more NSAGs supported by the first cell.

[0386] As an embodiment, the first node sends the first report through an RRC message and a NAS message.

[0387] For the first node, in step S10102, a first sub-report including the first sub-information is sent to the fourth node through an RRC message, the fourth node being an access network device.

[0388] For the fourth node, in step S10201, the first sub-report is received.

[0389] For the first node, in step S10103, a second sub-report including the second sub-information is sent to a core network device connected to the first node through a NAS message.

[0390] For the core network device, in step S10301, the second sub-report is received.

[0391] As an embodiment, the second sub-report is transparently transmitted to the fourth node through an RRC message including the first sub-report.

[0392] As an embodiment, the second sub-report is included in a NAS container of the RRC message.

[0393] As one embodiment, the fourth node does not resolve the second sub-report.

[0394] As one embodiment, the RRC message that transmits the second sub-report transparently is different from the RRC message that contains the first sub-report.

[0395] Embodiment 11

[0396] Embodiment 11 illustrates a structural block diagram of a processing apparatus in a first node according to one embodiment of the present application; as shown in FIG. 11. In FIG. 11, the processing apparatus 1100 in the first node includes a first processor 1101.

[0397] The first processor 1101 receives first signaling, the first signaling indicating a network slice access layer group (NSAG) set for cell reselection for a first cell, the NSAG set not including a first NSAG; the first NSAG being a NSAG used in performing a cell reselection procedure; records first information in response to the NSAG set not including the first NSAG; the first information including information of performing the cell reselection procedure based on the first NSAG; and transmits a first report, the first report including the first information.

[0398] As one embodiment, the first cell is a best cell in performing the cell reselection procedure based on the first NSAG.

[0399] As one embodiment, the first cell is a highest ranked cell in performing the cell reselection procedure based on the first NSAG.

[0400] As one embodiment, the first cell is a camped cell after performing the cell reselection procedure based on the first NSAG.

[0401] As one embodiment, the first processor 1101 receives second signaling, the second signaling indicating to record the first information in response to the NSAG set not including the first NSAG.

[0402] As one embodiment, the information of performing the cell reselection procedure based on the first NSAG is used to indicate at least one of: the NSAG set not including the first NSAG; information of the first cell; information of the first NSAG.

[0403] As one embodiment, the second signaling indicates content included in the information of performing the cell reselection procedure based on the first NSAG.

[0404] As one embodiment, the second signaling indicates at least one of: the information that the first node records for performing a cell reselection procedure based on the first NSAG comprises the information of the first cell only if the first cell is a second cell; the information that the first node records for performing a cell reselection procedure based on the first NSAG comprises the information of the first NSAG only if the first NSAG is a second NSAG.

[0405] As one embodiment, the first node is a user equipment.

[0406] As one embodiment, the user equipment is a terminal.

[0407] As one embodiment, the first node is a relay node equipment.

[0408] As one embodiment, the first processor 1101 comprises {antenna 452, receiver 454, reception processor 456, multi-antenna reception processor 458, controller / processor 459, memory 460, data source 467} in embodiment 4.

[0409] As one embodiment, the first processor 1101 comprises {antenna 452, receiver / transmitter 454, transmission processor 468, multi-antenna transmission processor 457, controller / processor 459, memory 460, data source 467} in embodiment 4.

[0410] Embodiment 12

[0411] Embodiment 12 illustrates a structural block diagram of a processing apparatus in a second node according to one embodiment of the present application; as shown in FIG. 12. In FIG. 12, the processing apparatus 1200 in the second node comprises a second processor 1201.

[0412] The second processor 1201 transmits second signaling, the second signaling indicating: a response that a set of NSAGs of a first cell for cell reselection does not include a first NSAG, a first node records first information; wherein the first NSAG is an NSAG used by the first node in performing a cell reselection procedure; the first information comprises information that the first node records for performing a cell reselection procedure based on the first NSAG.

[0413] As one embodiment, the first cell is a best cell in performing a cell reselection procedure based on the first NSAG.

[0414] As one embodiment, the first cell is a highest ranked cell in performing a cell reselection procedure based on the first NSAG.

[0415] As one embodiment, the first cell is a camped cell after the first node performs a cell reselection procedure based on the first NSAG.

[0416] As one embodiment, the information that the second signaling indicates for the first node to perform a cell reselection procedure based on the first NSAG comprises at least one of: an indication that the set of NSAGs for cell reselection for the first cell does not include the first NSAG; information of the first cell; information of the first NSAG.

[0417] As one embodiment, the second signaling indicates what the information that the first node performs a cell reselection procedure based on the first NSAG comprises.

[0418] As one embodiment, the second signaling indicates at least one of: the information that the first node performs a cell reselection procedure based on the first NSAG comprises the information of the first cell only if the first cell is a second cell; the information that the first node performs a cell reselection procedure based on the first NSAG comprises the information of the first NSAG only if the first NSAG is a second NSAG.

[0419] As one embodiment, the second node is a base station device.

[0420] As one embodiment, the second node is a user equipment.

[0421] As one embodiment, the second node is a relay node device.

[0422] As one embodiment, the second processor 1201 comprises {antennas 420, receivers / transmitters 418, transmit processor 416, multi-antenna transmit processor 471, controller / processor 475, memory 476} in embodiment 4.

[0423] As one embodiment, the second processor 1201 comprises {antennas 420, receivers / transmitters 418, receive processor 470, multi-antenna receive processor 472, controller / processor 475, memory 476} in embodiment 4.

[0424] Those skilled in the art can understand that all or part of the steps in the foregoing method can be instructed by programs to related hardware, and the programs can be stored in a computer readable storage medium, such as a read-only memory, a hard disk, an optical disk or the like. Alternatively, all or part of the steps of the foregoing embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the foregoing embodiments can be implemented in the form of hardware or in the form of a software function module, and the present application is not limited to any specific form of combination of software and hardware. The user equipment, terminal and UE in the present application include but are not limited to unmanned aerial vehicles, communication modules on unmanned aerial vehicles, remote control aircraft, aircraft, small aircraft, mobile phones, tablet computers, notebook computers, vehicle-mounted communication devices, vehicles, vehicles, RSUs, wireless sensors, network cards, Internet of Things terminals, RFID (Radio Frequency Identification) terminals, NB-IoT (Narrow Band Internet of Things) terminals, MTC (Machine Type Communication) terminals, eMTC (enhanced MTC) terminals, data cards, network cards, vehicle-mounted communication devices, low-cost mobile phones, low-cost tablet computers and other wireless communication devices. The base station or system device in the present application includes but is not limited to macro cellular base stations, micro cellular base stations, small cellular base stations, home base stations, relay base stations, eNB (evolved Node B), gNB, TRP, GNSS (Global Navigation Satellite System), relay satellites, satellite base stations, air base stations, RSUs, unmanned aerial vehicles, test equipment such as wireless communication devices that simulate part of the functions of base stations or signaling testers, and the like.

[0425] Those skilled in the art will understand that the application can be implemented by other specified forms without departing from the core or essential characteristics thereof. Therefore, the presently disclosed embodiments should in no way be considered as descriptive rather than limiting. The scope of the application is determined by the appended claims rather than the preceding description, and all modifications within the equivalent meaning and range of the claims are considered to be included therein.

Claims

1. A method for a first node used for wireless communication, the method comprising: Comprising: receiving first signaling, the first signaling indicating a network slice access stratum group (NSAG) set for cell reselection for a first cell, the NSAG set not including a first NSAG; the first NSAG being a NSAG used in performing a cell reselection procedure; in response to the NSAG set not including the first NSAG, recording first information; the first information including information based on performing a cell reselection procedure using the first NSAG; sending a first report, the first report including the first information.

2. The method of claim 1, wherein, Comprising: the first cell being a best cell in performing a cell reselection procedure based on the first NSAG; or, the first cell being a highest ranked cell in performing a cell reselection procedure based on the first NSAG; or, the first cell being a camped cell after performing a cell reselection procedure based on the first NSAG.

3. The method according to claim 1 or 2, characterized in that, Comprising: receiving second signaling indicating, in response to the NSAG set not including the first NSAG, recording the first information.

4. The method according to any one of claims 1 to 3, characterized in that, the information based on performing a cell reselection procedure using the first NSAG, for indicating at least one of: the NSAG set not including the first NSAG; information of the first cell; information of the first NSAG.

5. The method of claim 4, wherein, the second signaling indicating content included in the information based on performing a cell reselection procedure using the first NSAG.

6. The method of claim 5, wherein, the second signaling indicating at least one of: the information based on performing a cell reselection procedure using the first NSAG including the information of the first cell only if the first cell is a second cell; the information based on performing a cell reselection procedure using the first NSAG including the information of the first NSAG only if the first NSAG is a second NSAG.

7. A first node for wireless communication, the first node comprising: Comprising: the first node comprising: one or more processors and a memory; the memory coupled with the one or more processors, the memory storing computer program code including computer instructions, the one or more processors invoking the computer instructions to cause the first node to perform a method as claimed in any of claims 1-6.

8. A method for a second node used for wireless communication, the method comprising: Comprising: sending second signaling indicating, in response to a NSAG set for cell reselection for a first cell not including a first NSAG, a first node recording first information; wherein the first NSAG is a NSAG used by the first node in performing a cell reselection procedure; and the first information includes information based on performing a cell reselection procedure using the first NSAG by the first node.

9. The method of claim 8, wherein, Comprising: the first cell being a best cell in performing a cell reselection procedure based on the first NSAG by the first node; or, the first cell being a highest ranked cell in performing a cell reselection procedure based on the first NSAG by the first node; or, the first cell being a camped cell after performing a cell reselection procedure based on the first NSAG by the first node.

10. The method according to claim 8 or 9, characterized in that, The information for the first node to perform the cell reselection procedure based on the first NSAG indicates at least one of: The first NSAG is not included in the set of NSAGs for cell reselection of the first cell; Information of the first cell; Information of the first NSAG.

11. The method according to any one of claims 8 to 10, characterized in that, The second signaling indicates what the information for the first node to perform the cell reselection procedure based on the first NSAG includes.

12. The method of claim 11, wherein, The second signaling indicates at least one of: The information for the first node to perform the cell reselection procedure based on the first NSAG includes the information of the first cell only if the first cell is a second cell; The information for the first node to perform the cell reselection procedure based on the first NSAG includes the information of the first NSAG only if the first NSAG is a second NSAG.

13. A second node configured for wireless communication, the second node comprising: Comprise: The second node comprises one or more processors and a memory; The memory is coupled to the one or more processors, and the memory is configured to store computer program codes including computer instructions, and the one or more processors are configured to invoke the computer instructions to cause the second node to perform the method according to any one of claims 8-12.

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