Recording of Residence Time with Respect to Upper Limit for Wireless Communication

Abstract

This document generally relates to wireless communication including a first communication node that adds a time value to historical information of a user device in response to a residence time exceeding 4,095 seconds or exceeding a predetermined upper limit time value that the user device stays within a cell, and the time value accurately indicates the residence time. The first communication node can transmit the historical information including the time value to a second communication node. Also, at least one communication node can add a time value to at least one historical information, and the time value indicates the residence time that the user device is within the cell. At least one of the time values is a residence time exceeding 4,095 seconds or a predetermined upper limit time value and accurately indicates the residence time. At least one communication node can correlate at least one historical information.

Description

Technical Field

[0001] This document relates to the general dwell time in the history information of user devices for wireless communication.

Background Art

[0002] Background In wireless communication including multi-radio access technology dual connectivity (MR-DC), a user device having multiple receive / transmission (Rx / Tx) capabilities may be configured to use resources from two nodes including a node providing a new radio (NR) access and another node providing either evolved universal terrestrial radio access (E-UTRA) or NR access. Further, in MR-DC, one node functions as a master node (MN) and the other node functions as a secondary node (SN). The nodes can record information regarding the time the user device stays in MR-DC and the cell in which the user device is served. Further, at least one of the nodes can associate the recorded information. However, if at least a part of the recorded information is incorrect, a correlation error may occur, resulting in an incorrect decision to select an SN or support a DC. Therefore, a method for avoiding or minimizing the correlation error may be desirable.

Summary of the Invention

Means for Solving the Problems

[0003] Summary This document relates to a method, system, apparatus, and device for wireless communication. In some embodiments, a method for wireless communication is to add a time value to the history information of a user device in response to a dwell time of the user device in a cell exceeding 4,095 seconds or exceeding a predetermined upper limit time value using a first communication node, where the time value accurately indicates the dwell time, and to transmit the history information including the time value to a second communication node using the communication node.

[0004] In some other embodiments, a method for wireless communication is to add a plurality of time values to at least one piece of history information of a user device using at least one communication node, wherein the plurality of time values correspond to a plurality of residence times of the user device in a plurality of cells, and the time value among the plurality of time values accurately indicates a residence time exceeding 4,095 seconds or a predetermined upper limit time value, and using at least one communication node to correlate the at least one piece of history information to generate correlated history information.

[0005] In some other implementations, devices such as network devices are disclosed. The device may include one or more processors and one or more memories, and the one or more processors are configured to read computer code from the one or more memories to implement any of the above methods.

[0006] In still some other implementations, a computer program product is disclosed. The computer program product may include a non-transitory computer-readable program medium storing computer code, and the computer code causes one or more processors to implement any of the above methods when executed by the one or more processors.

[0007] The above and other aspects and their implementations are described in more detail in the drawings, the text of the specification, and the claims.

Brief Description of the Drawings

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Figure 1

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Figure 2

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Figure 3

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Figure 4

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Figure 5

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Figure 6

[0014] Detailed Description This specification describes various embodiments of a system, apparatus, device, and method for wireless communication involving recording the residence time of a user device within a cell for wireless communication.

[0015] FIG. 1 shows a diagram of an exemplary wireless communication system 100 including a plurality of communication nodes (or simply nodes) configured to wirelessly communicate with each other. Generally, a communication node includes at least one user device 102 and at least one wireless access node 104. The exemplary wireless communication system 100 of FIG. 1 is shown as including two user devices 102, a first user device 102(1) and a second user device 102(2), and one wireless access node 104. However, various other examples of the wireless communication system 100 can be envisioned including any of various combinations of one or more user devices 102 and / or one or more wireless access nodes 104.

[0016] Generally, a user device as described herein, such as user device 102, can include a single electronic device or apparatus, or a plurality of electronic devices or apparatuses (e.g., a network of electronic devices or apparatuses) that can communicate wirelessly via a network. The user device can include, or otherwise be referred to as, a user terminal, a user terminal device, or a user device (UE). Further, the user device can be, or can include, a mobile device (such as a cellular phone, smartphone, smartwatch, tablet, laptop computer, vehicle or other vessel (as non-limiting examples, a human, motor, or engine-driven vehicle or other vessel such as an automobile, airplane, train, ship, or bicycle), or a fixed or stationary device (as non-limiting examples, a device, other relatively heavy device including the Internet of Things (IoT), or a desktop computer or other computing device that is not normally moved for long periods of time, such as those used in a commercial or industrial environment), etc.), but is not limited thereto. In various embodiments, user device 102 can include a transceiver circuit 106 coupled to an antenna 108 for wireless communication with wireless access node 104. The transceiver circuit 106 can also be coupled to a processor 110 that can be coupled to a memory 112 or other storage device. The memory 112 can store instructions or code that, when read and executed by the processor 110, cause the processor 110 to perform various methods described herein.

[0017] In addition, generally, the wireless access nodes described herein, such as the wireless access node 104, can include a single electronic device or apparatus, or a plurality of electronic devices or apparatuses (e.g., a network of electronic devices or apparatuses), and can include one or more base stations or other wireless network access points that can wirelessly communicate with one or more user devices and / or one or more other wireless access nodes 104 via a network. For example, the wireless access node 104 can include at least one of a master node, a secondary node, a 4G LTE base station, a 5G NR base station, a 5G central unit base station, a 5G distributed unit base station, a next-generation node B (gNB), an enhanced node B (eNB), or other similar or next-generation (e.g., 6G) base stations, or a location management function (LMF) in various embodiments. The wireless access node 104 can include a transceiver circuit 114 coupled to an antenna 116 that can include an antenna tower 118 in various ways for performing wireless communication with the user device 102 or another wireless access node 104. The transceiver circuit 114 can also be coupled to one or more processors 120 that can be coupled to a memory 122 or other storage device. The memory 122 can store instructions or code that, when read and executed by the processor 120, cause the processor 120 to perform one or more of the methods described herein.

[0018] FIG. 2 is a block diagram showing a configuration example of the radio access node 104. In an exemplary configuration, the radio access node 104 includes two master nodes 202(1), 202(2) and two secondary nodes 204(1), 204(2). Each of the master node 202 and the secondary node 204 can be configured by hardware or a combination of hardware and software, such as having a processor 120, a memory 122, a transceiver circuit 114, an antenna 116, and / or an antenna tower 118, as shown in FIG. 1 for the radio access node 104. Further, as shown in FIG. 2, each of the master node 202 and the secondary node 204 can be configured to communicate (transmit and receive) with each other, such as signals or messages, and can be configured to communicate (transmit and receive) with one or more user devices 102 directly or indirectly via another component of the radio access node 104. Also, the exemplary configuration of FIG. 2 shows two master nodes 202 and two secondary nodes 204, but other exemplary configurations can include any of various combinations of one or more master nodes 202, one or more secondary nodes 204, or a combination of one or more master nodes 202 and one or more secondary nodes 204. Also, as will be described in more detail, in various embodiments, during a handover procedure, one of the master nodes 202(1) can operate or function as a source master node, and another one of the master nodes 202(2) can operate or function as a target master node. Further functions of the master node 202 and the secondary node 204 will be described in more detail below.

[0019] Returning to FIG. 1 for reference, in various embodiments, two communication nodes within the wireless system 100, such as the user device 102 and the wireless access node 104, two user devices 102 without the wireless access node 104, or two wireless access nodes 104 without the user device 102, may be configured to wirelessly communicate with each other within a mobile network and / or a wireless access network, or via a mobile network and / or a wireless access network, according to one or more standards and / or specifications. Generally, the standards and / or specifications may define rules or procedures by which the communication nodes can wirelessly communicate, and in various embodiments, may include those for communicating in the millimeter (mm) wave band and / or with a multi-antenna system and beamforming function. In addition to or instead of this, the standards and / or specifications, by way of non-limiting example, define wireless access technologies and / or cellular technologies such as 4th generation (4G) Long Term Evolution (LTE), 5th generation (5G) New Radio (NR), or New Radio Unlicensed (NR-U).

[0020] Furthermore, in the wireless system 100, the communication nodes are configured to wirelessly communicate signals with each other. Generally, communication in the wireless system 100 between two communication nodes can be, or can include, transmission or reception, and generally, depending on the perspective of a particular node in the communication, both are performed simultaneously. For example, in a given communication between a first node and a second node, where the first node is transmitting a signal to the second node and the second node is receiving a signal from the first node, in the case of a given communication, the first node may be referred to as the transmitting source or transmitting node or device, and the second node may be referred to as the receiving destination or receiving node or device, and the communication can be regarded as transmission for the first node and reception for the second node. Of course, since the communication nodes in the wireless system 100 can transmit and receive signals, a single communication node can switch between being both a transmitting / transmitting source node and a receiving / receiving destination node, or a transmitting source / transmitting node and a receiving destination / receiving node.

[0021] Also, a particular signal can be characterized or defined as either an uplink (UL) signal, a downlink (DL) signal, or a side link (SL) signal. An uplink signal is a signal transmitted from the user device 102 to the radio access node 104. A downlink signal is a signal transmitted from the radio access node 104 to the user device 102. A side link signal is a signal transmitted from one user device 102 to another user device 102, or from one radio access node 104 to another radio access node 104. Also, for side link transmission, the first / transmitting source user device 102 directly transmits the side link signal to the second / receiving destination user device 102 without forwarding the side link signal to the radio access node 104.

[0022] Furthermore, signals communicated between communication nodes within system 100 may be characterized or defined as data signals or control signals. Generally, a data signal is a signal that includes or conveys data such as multimedia data (e.g., audio and / or image data), and a control signal is a signal that conveys control information that configures communication nodes in a particular way to communicate with each other or controls the way communication nodes communicate data signals with each other. Also, a particular signal may be defined or characterized by a combination of data / control and uplink / downlink / sidelink, including uplink control signals, uplink data signals, downlink control signals, downlink data signals, sidelink control signals, and sidelink data signals.

[0023] In at least some specifications such as 5G NR, data and control signals are transmitted and / or carried on physical channels. Generally, a physical channel corresponds to a set of time-frequency resources used for signal transmission. Different types of physical channels can be used to transmit different types of signals. For example, a physical data channel (or simply data channel) is used to transmit data signals, and a physical control channel (or simply control channel) is used to transmit control signals. Examples of types of physical data channels include, but are not limited to, the physical downlink shared channel (PDSCH) used to communicate downlink data signals, the physical uplink shared channel (PUSCH) used to communicate uplink data signals, and the physical sidelink shared channel (PSSCH) used to communicate sidelink data signals. Further, examples of types of physical control channels include, but are not limited to, the physical downlink control channel (PDCCH) used to communicate downlink control signals, the physical uplink control channel (PUCCH) used to communicate uplink control signals, and the physical sidelink control channel (PSCCH) used to communicate sidelink control signals. As used herein for simplicity, unless otherwise specified, a particular type of physical channel is also used to refer to the signals transmitted on that particular type of physical channel and / or the transmission on that particular type of transmission. By way of illustration, PDSCH refers to the physical downlink shared channel itself, the downlink data signals transmitted on the PDSCH, or downlink data transmission. Thus, a communication node transmitting or receiving the PDSCH means that the communication node is transmitting or receiving signals on the PDSCH.

[0024] Furthermore, for at least some specifications such as 5G NR, and / or for at least some types of control signals, the control signals transmitted by a communication node can include control information that is necessary to enable the transmission of one or more data signals between communication nodes and / or to schedule one or more data channels (or one or more transmissions on a data channel). For example, such control information can include information necessary for proper reception, decoding, and demodulation of data signals received on a physical data channel during data transmission and / or for an uplink scheduling grant that notifies a user device about resources and transport formats to be used for uplink data transmission. In some embodiments, the control information includes downlink control information (DCI) transmitted in the downlink direction from the radio access node 104 to the user device 102. In other embodiments, the control information includes uplink control information (UCI) transmitted in the uplink direction from the user device 102 to the radio access node 104, or sidelink control information (SCI) transmitted in the sidelink direction from one user device 102(1) to another user device 102(2).

[0025] In addition, in at least some embodiments, and / or according to one or more wireless communication standards such as, for example, 3rd Generation Partnership Project (3GPP (registered trademark)) TS 37.340, in wireless communication including multi-radio access technology dual connectivity (MR-DC), a user device 102 having multiple receive / transmission (Rx / Tx) capabilities may be configured to use resources from two nodes, including one that provides new radio (NR) access and another that provides either evolved universal terrestrial radio access (E-UTRA) or NR access. Also, in MR-DC, one node may operate or function as a master node (MN) 202 and the other node may operate or function as a secondary node (SN) 204. In at least some of these embodiments, the master node 202 can store and / or correlate history information of the user device 102 (also referred to as UE history information or UHI) determined by the master node 202 and / or the secondary node 204. In various embodiments, the master node 202 can do so as long as the user device 102 remains in MR-DC. Further, the master node 202 can transfer the history information determined or recorded by the master node 202 and / or the secondary node 204 and / or the history information determined or recorded by the user device 102 to one or more secondary nodes 204 to which the master node 202 is connected. The secondary node 204 that then receives the history information can use it for dual connectivity operation. Further, the secondary node 204 can collect secondary cell group (SCG) history information of the user device 102 and provide the SCG history information to the master node 202.

[0026] In addition to this, or in at least some embodiments including dual connectivity, the user device 102 may be connected to a master cell group (MCG) and a secondary cell group (SCG). The MCG may include a primary cell (PCell) which is the cell that the user device 102 first finds and connects to. The MCG may also include, in addition to the PCell, one or more secondary cells (SCells) with which the user device 102 communicates for carrier aggregation. The SCG may include a primary-secondary cell (PSCell) to which the user device 102 first connects between the cells within the SCG. The SCG may also include, in addition to the PSCell, one or more SCells with which the user device 102 communicates for carrier aggregation. In various embodiments, the master node 202 may be able to process the MCG including the PCell, and the secondary node 204 may be able to process the SCG including the PSCell.

[0027] Furthermore, in various embodiments, the history information (also referred to as MN history information or MN UHI) determined or recorded by the master node 202 can include information regarding the PCell to which the user device 102 corresponds. Additionally, the history information (also referred to as SN history information or SN UHI) determined or recorded by the secondary node 204 can include information regarding the PSCell served by the user device 102. The secondary node 204 can collect the SN UHI and transfer the SN UHI to the master node 204. Additionally, after receiving the SN UHI from the secondary node 204, the master node 202 can collect the MN UHI and correlate the MN UHI with the SN UHI. When correlating the MN UHI with the SN UHI, the master node 202 can construct a matching relationship between the PCell and the PSCell. When the master node 202 correlates the MN UHI with the SN UHI, the resulting correlated UHI can indicate which PSCell served the user device 102 at the same time that a given PCell served the user device 102. Thus, when the radio access node 104 (e.g., gNB) accesses or obtains the correlated UHI, it can know which PSCell served the user device 102 at the same time that a given PCell served the user device 102. During handover, the source master node 202(1) can send the correlated UHI to the target master node 202(2). The correlated UHI can assist in determining whether the target master node 204 selects an appropriate secondary node 204 and / or whether dual connectivity (DC) is or needs to be supported.

[0028] There may be a correlation error in the UHI after correlation. The correlation error can be an incorrect indication of a PSCell that is or is not serving the user device 102 while a given PCell is serving the user device 102. If there is a correlation error in the correlated UHI provided by the source master node 202(1) to the target master node 202(2), the target master node 202(2) may make an incorrect decision to select an appropriate secondary node 204 or to determine DC support.

[0029] In addition, in various embodiments, the UHI may be communicated (sent and received) between the master node 202, the secondary node 204, and the user device 102 via messages. For example, the UHI may be transferred from the secondary node 204 to the master node 202 by being included in at least one of a secondary node modification request message, a secondary node modification request confirmation response message, a secondary node change request message, a secondary release confirmation response message, or a secondary release request message, to comply with one or more wireless communication standards.

[0030] In addition to or instead of this, the UHI may be transferred from the source master node 202(1) to the target master node 202(2) by being included in a handover request message or a UE context search response message. In addition to or instead of this, the UHI may be transferred from the master node 202 to the secondary node 204 by being included in a secondary node addition request message. In addition to or instead of this, the UHI may be transferred from the user device 102 to the master node 202 by being included in a UE information response message. Also, in various embodiments, the UHI determined or recorded by the user device 102 and / or transferred from the user device 102 may be referred to as mobility history information. Also, in any of various embodiments, the UHI included in a message may be included as an information element (IE) within the message. Correspondingly, the UHI within the message may be a UHI IE within the message.

[0031] In addition to or instead of this, in various embodiments, a communication node (e.g., the user device 102, the master node 202, or the secondary node 204) may be configured to determine and / or record the residence time of one or more user devices 102 for one or more cells. Generally, the residence time (also referred to as the stay time) is the amount (or duration) of time that the user device 102 is within or connected to a given cell. In various embodiments, the cell may be a PCell or a PSCell, as will be described in more detail below. Further, the communication node may be able to include the recorded residence time as part of the UHI.

[0032] Furthermore, in various embodiments, the communication node may be configured with a predetermined upper limit time value (or upper bound time value) corresponding to the sojourn time. A user device 102 staying in the cell longer than the predetermined upper limit time value may cause a correlation error. For example, when the user device 102 stays in the cell longer than the predetermined upper limit time value, the communication node that records the sojourn time may erroneously record the predetermined upper limit time value as the sojourn time. Here, a method for eliminating or reducing the correlation error caused by the sojourn time of the user device 102 being longer than the predetermined upper limit time value will be described.

[0033] FIG. 3 is a method 300 for wireless communication with history information. In block 302, the first communication node may add a time value to the history information (e.g., UHI) of the user device according to a residence time that exceeds 4,095 seconds during which the user device stays within the cell or exceeds a predetermined upper limit time value. The added time value accurately indicates the residence time. As will be described in more detail below, in some embodiments that comply with one or more communication standards, the predetermined upper limit time value may be 4,095 seconds, but other embodiments with other or different predetermined upper limit time values may also be possible. Also, as will be described in more detail below, in some embodiments, the cell is a PCell, and in other embodiments, the cell is a PSCell. Further, in some embodiments, the first communication node can add a time value by including the time value in an information element (IE) such as an IE or a field, such as those included in or part of a message communicated between communication nodes. In block 304, the first communication node may transmit the history information including the time value to the second communication node. As will be described in more detail below, in some embodiments, the first communication node can include the secondary node 204, and the second communication node can include the master node 202. In other embodiments, the first communication node can include the source master node 202(1), and the second communication node can include the target master mode 202(2). In other embodiments, the first communication node can include the master node 202, and the second communication node can include the secondary node 204. In other embodiments, the first communication node may include the user device 102, and the second communication node may include the master node 202.

[0034] As described above, in some embodiments, the predetermined upper limit time value may be 4,095 seconds. In other embodiments, the predetermined upper limit time value may be a time value exceeding 4,095 seconds, such as, by way of non-limiting example, 4,500 seconds, 5,000 seconds, 10,000 seconds, or 40,950 seconds. And by making the predetermined upper limit time value longer than 4,095 seconds, a time value correctly indicating a residence time longer than 4,095 seconds can be added to the communication node that records the residence time. For example, assume that the predetermined upper limit time value is 40,950 seconds. When the user device 102 stays in a given PCell (for example, PCell 1) for 10,000 seconds, the communication device that records the residence time can add a time value correctly indicating that the user device 102 has stayed in PCell 1 for 10,000 seconds to the history information. In contrast, in the case of an embodiment where the predetermined upper limit time value is 4,095 seconds, the communication node erroneously records the residence time as 4,095 seconds.

[0035] In various ones of these embodiments, time values indicating a residence time exceeding 4,095 seconds may be included in a time residence IE such as an SCG UE history information IE defined in TS 38.423, and / or a last visited PSCell information IE such as that defined in TS 38.413. In addition or alternatively, the time value may be included in a UE history information IE as defined in TS 38.423 and / or TS 38.413, and / or in a cell extension granularity IE of the time the UE stayed in a cell IE and / or the last visited next generation radio access network (NG-RAN) cell information IE as defined in TS 38.413. In addition or alternatively, for any of these IEs, a predetermined upper limit time value may be greater than 4,095 seconds as described above, and as a result, the time value added to or included in the IE indicates a residence time greater than 4,095 seconds. The SCG UE history information IE may be an IE including information regarding a PSCell served by an active secondary node. Tables 1 and 2 below show tables of, for example, the last visited PSCell information and the last visited NG-RAN cell information.

Table 1

Table 2-1

Table 2-2

Table 2-3

[0036] In addition to or instead of this, in some embodiments, if the residence time exceeds 4,095 seconds, the first communication node can add the time value to the historical information by including the time value in the extended residence field of the historical information or in an IE (or a field of the IE). The time value can indicate a residence time exceeding 4,095 seconds. Further, for some of these specific embodiments, the time value may be included in the extended residence time IE of the SCG UE historical information IE as defined in TS 38.423 and / or in the last visited PSCell information IE as defined in TS 38.413. In addition to or instead of this, the time value may be included in the extended residence time IE of the UE historical information IE (which may also be referred to as the extended time the UE stayed in the cell IE) as defined in TS 38.423 and / or TS 38.413, and / or in the last visited NG-RAN cell information IE as defined in 38.413. Also, for at least some of these embodiments, the extended residence field may be in addition to the time residence field included in the IE. In addition to or instead of this, in response to the residence time exceeding 4,095 seconds and / or a predetermined upper limit time value, the first communication node can create an extended time residence field and / or add the time value to the extended time residence field. Also, the last visited NG-RAN cell information IE may be an IE containing information about the cell. In the case of an NR cell, it contains information about a set of NR cells having the same NR absolute radio frequency channel number (ARFCN), and the global cell ID IE identifies one of the NR cells in the set. Further, the information in the last visited NG-RAN cell information IE can be used for radio resource management (RRM) purposes. Tables 3 and 4 below show tables of, for example, the last visited PSCell information and the last visited NG-RAN cell information.

Table 3

Table 4-1

Table 4-2

Table 4-3

[0037] In addition to or instead of this, in various embodiments, the time value added by the first communication device can include an extra time value. Among these embodiments, in particular, the history information can include at least one entry and / or a list of at least one entry. Each entry can be for a specific cell (e.g., a PCell or a PSCell), or can correspond to a specific cell, and can be indicated by the cell ID of the specific cell. Further, each entry can have or can include a correspondence or relationship between a specific cell and the residence time of the user device 102 in the specific cell. Further, when the residence time of the user device 102 exceeds a predetermined upper limit time value, or in response thereto, the first communication node can include an extra time value that identifies or indicates that the user device 102 has stayed in the cell longer than the predetermined upper limit time value and / or an entry having an amount of time exceeding the predetermined upper limit time value. In at least some of these embodiments, when the user device 102 stays in the cell longer than the predetermined upper limit time value, the first communication node can include or create at least two entries for the user device 102. The following example is shown in Table 5.

Table 5

[0038] In the example corresponding to Table 5, the predetermined upper limit time value is 4,095 seconds, and the user device stays at PSCell 1 for 4,195 seconds. Therefore, the first communication node 102 creates two entries for PSCell 1. The first entry for PSCell 1 has a correspondence between PSCell 1 and the predetermined upper limit time value (e.g., 4,095 seconds), and the second entry for PSCell 1 has a correspondence between PSCell 1 and an extra time value of 100 seconds, indicating the amount of time that the user device 102 stayed at PSCell 1 exceeding the predetermined upper limit time value. Further, as shown in the example, the sum of the stay times of the entries of a specific cell can indicate the total time that the user device 102 stayed at the cell. For example, in the example of Table 5, the sum of 4,095 seconds and 100 seconds of the two entries for PSCell 1 indicates that the user device 102 stayed at PSCell 1 for 4,195 seconds. Further, in at least some embodiments such as the example of Table 5, when multiple entries are created for a specific cell, those entries can be consecutive entries in the history information. For example, as shown in Table 5, the multiple entries are for multiple cells including PSCell 1 and PSCell 2, and the two entries for PSCell 1 are consecutive entries. As shown in Table 5, the stay times of 4,095 seconds and 100 seconds correspond to cells having the same cell identification information (ID), so they are in consecutive entries, that is, both 4,095 and 100 correspond to ID:PSCell 1.

[0039] Also, in at least some embodiments, if the amount of time that the user device 102 stays longer than a predetermined upper limit time value itself is greater than the predetermined upper limit time value, the first communication node may create a plurality of additional entries for the user device 102. For example, the first communication node may be configured to create time entries every multiple of a predetermined upper limit time value that the user device 102 stays within the cell. By way of illustration, assume that the predetermined upper limit time value is 5,000 seconds and the user device 102 stays within the cell for 11,000 seconds. In response, the first communication node can create three entries including a first entry indicating a stay time of 5,000 seconds of the predetermined upper limit time value, a second entry indicating a stay time of 5,000 seconds of the predetermined upper limit time value, and a third entry indicating a stay time of 1,000 seconds. In the case of such embodiments, the extra time value can include a plurality of additional time values. For example, in the illustration, the extra time value can include a first extra time value indicating 5,000 seconds and a second extra time value indicating 1,000 seconds.

[0040] Also, in some embodiments where the first communication node is the master node 202, the secondary node 204, or the user device 102, the number of entries that the first communication node can create for one or more PCells may exceed 16. For at least some of these embodiments, the maximum number (i.e., the number of entries that the first communication node cannot generate beyond this) may be, by way of non-limiting example, 24 or 32. In addition or alternatively, in some embodiments where the first communication node is the master node 202, the secondary node 204, or the user device 102, the number of entries that the first communication node can create for one or more PSCs may exceed 8. For at least some of these embodiments, the maximum number (i.e., the number of entries that the first communication node cannot generate beyond this) may be, by way of non-limiting example, 16, 24, or 32.

[0041] Also, in various embodiments as described above, the extra time values and / or consecutive entries may be included in one or more IEs. For example, one or more extra time values and / or consecutive entries can be included in the UE history information IE or the SCG UE history information, such as defined in TS 38.413 and / or TS 38.423. Tables 6 to 9 show tables such as SCG UE history information, UE history information from the UE, and UE history information, for example.

Table 6

Table 7

Table 8-1

Table 8-2

Table 9

[0042] In addition to or instead of this, when the residence time exceeds a predetermined upper limit time value, the time value added by the first communication node may include or be a time stamp that identifies the release time when the user device 102 leaves the cell. Table 10 shows the following example.

Table 10

[0043] As shown in the example of Table 10, the historical information includes three entries for three different PSCs, namely PSCell 1, PSCell 2, and PSCell 3. Also, in this example, the user device 102 stays in PSCell 2 for a longer time than the predetermined upper limit time value of 4,095 seconds. Accordingly, the first communication node adds a timestamp of 9:20:00 indicating the release time when the user device 102 leaves PSCell 2. Also, in at least some embodiments as shown in Table 10, when the stay time exceeds the predetermined upper limit time value, the first communication node can include the predetermined upper limit time value of the stay time and add a timestamp. In addition or alternatively, an entry in a table including such a timestamp may have one or more corresponding relationships between the PSCell where the user device 102 stays longer than the predetermined upper limit time value, the timestamp, and the stay time. For example, in Table 10, the second entry for PSCell 2 includes three fields, a first field of the PSCell ID of PSCell 2, a second field of the stay time (having the predetermined upper limit time value), and a third field of the timestamp.

[0044] Furthermore, in various ones of these embodiments, the timestamp may be included in a field of an IE. For example, the timestamp may be included in a timestamp field such as the last visited NG-RAN cell information IE and / or the last visited PSCell information IE as defined in TS 38.413. Table 11 shows, for example, a table of the last visited NG-RAN cell information and the last visited PSCell information.

Table 11-1

Table 11-2

Table 11-3

[0045] In addition to or instead of this, in some embodiments, in response to the dwell time exceeding a predetermined upper limit time value, the time value added to the history information can include at least one timestamp, and each timestamp is of the additional (start) time when the user device 102 enters the corresponding cell among a plurality of cells. An example is shown with respect to FIG. 4, which shows a timing diagram of the user device 102 in a plurality of PCells and a plurality of PSCs. In this example, there are two PCells including PCell 1 and PCell 2, and three PSCs including PSCell 1, PSCell 2, and PSCell 3. FIG. 4 shows that the user device 102 is also in PSCell 1 and PSCell 2 during the period or duration that the user device 102 is in PCell 1. That is, the period that the user device 102 is in PCell 1 at least partially overlaps with the period that the user device 102 is in PSCell 1, and at least partially overlaps with the period that the user device 102 is in PSCell 2. In addition, during the period that the user device is in PCell 2, the user device 102 is also in PSCell 2 and PSCell 3. That is, the period that the user device is in PCell 2 at least partially overlaps with the period that the user device is in PSCell 2, and at least partially overlaps with the period that the user device is in PSCell 3. Therefore, the correct correlation between the two PCells and the three PSCs is that PCell 1 correlates with PSCell 1 and PSCell 2, and PCell 2 correlates with PSCell 2 and PSCell 3.

[0046] Also, in the example of FIG. 4, the user device 102 enters PSCell 1 at time t1, leaves PSCell 1 at time t2, enters PSCell 2 at time t3, leaves PSCell 2 at time t4, enters PSCell 3 at time t5, and leaves PSCell 3 at time t6. Correspondingly, the user device 102 has a stay time T1 from t1 to t2 for PSCell 1, a stay time T2 from t3 to t4 for PSCell 2, and a stay time T3 from t5 to t6 for PSCell 3.

[0047] Therefore, in the example of FIG. 4, the first communication node can add three timestamps corresponding to the three times t1, t3, and t5 when the user device 102 enters PSCell 1, PSCell 2, and PSCell 3, respectively. At this time, the master node 202 can recognize the start times t1, t3, and t5 of each PSCell. Then, according to the stay times T1, T2, and T3 for reaching the PSCell, the master node 202 can derive the corresponding end (release) times t2, t4, and t6 of each PSCell. Next, the master node 202 can create a correct correlation list of two PCells and three PSCells.

[0048] In FIG. 4, it shows that the timestamp added to the history information is the additional time for entering the PSCell, but in other embodiments, a timestamp of the additional time for entering the PCell may be added. Similarly, the correct correlation list can be determined by the master node 202.

[0049] Furthermore, in various embodiments of these embodiments, the timestamp may be included in the fields of the IE. For example, the timestamp may be included in the timestamp fields such as the last visited NG-RAN cell information IE and / or the last visited PSCell information IE as defined in TS 38.413. Table 12 shows a table of, for example, the last visited NG-RAN cell information and the last visited PSCell information.

Table 12-1

Table 12-2

Table 12-3

[0050] In addition to or instead of this, in some embodiments, in response to the sojourn time exceeding a predetermined upper limit time value, the time value added to the history information can include at least one timestamp, and each timestamp is that of the release (end) time when the user device 102 enters the corresponding cell among the plurality of cells. An example is shown with respect to FIG. 5, and FIG. 5 shows a timing diagram of the user device 102 in a plurality of PCells and a plurality of PSCs. FIG. 5 is the same as FIG. 4 except that it shows the timestamps added to the release times t2, t4, t6. By knowing the release times t2, t4, and t6 and the sojourn times T1, T2, and T3, the master node 202 can create a correct correlation list of the PCell and the PSCell. Also, FIG. 5 shows that the added timestamp is the timestamp of the release time for exiting the PSCell, but other embodiments can add the timestamp of the release time for exiting the PCell. Similarly, the correct correlation list can be determined by the master node 202.

[0051] Furthermore, in various embodiments among these embodiments, the timestamp may be included in the IE fields. For example, the timestamp may be included in the timestamp fields such as the last visited NG-RAN cell information IE and / or the last visited PSCell information IE as defined in TS 38.413. Table 13 shows a table of, for example, the last visited NG-RAN cell information and the last visited PSCell information.

Table 13-1

Table 13-2

Table 13-3

[0052] In addition to or instead of this, in some embodiments, the time value added by the first communication node can include at least one timestamp for at least one of the SN addition request confirmation response message or the SN modification request message. In various of these embodiments, the timestamp can be the addition (or start) time when the user device 102 enters one or more cells and / or the release (or exit) time when the user device 102 leaves one or more cells. For the sake of explanation, referring to FIG. 4 or 5, based on the timestamp, the master node 202 can determine the initial addition time t1 and the final release time t6 of the PSCell timestamp. The master node 202 can also determine the duration that the user device 102 is not in the PSCell, such as the duration from t2 to t3 and the duration from t4 to t5. Depending on the time stay parameters T1, T2, and T3, and the duration that the user device 102 is not in the PSCell, the master node 202 can determine the addition time and the release time between t1 and t6, that is, the release time t2, the addition time t3, the release time t4, and the addition time t5. Next, the master node 202 can determine an accurate correlation list that correlates PSCell 1 and 2 with PCell 1 and PSCell 2 and 3 with PCell 2.

[0053] Furthermore, in various ones of these embodiments, a timestamp may be included in a message. For example, the timestamp may be included in a message such as a secondary node addition request confirmation response message, and / or a secondary node modification request message as defined in TS 38.423. The secondary node addition request confirmation response message is a message sent from the master node 202 to the secondary node 204 to request preparation of resources for dual connectivity operation for a specific user device 102. The secondary node modification request message is a message sent from the secondary node 204 to the master node 202 to request modification of secondary node resources for a specific user device 102. Table 14 shows a table of, for example, S node addition request confirmation response messages and S node modification request messages.

Table 14-1

Table 14-2

Table 14-3

Table 14-4

Table 14-5

Table 14-6

Table 14-7

[0054] In addition to or instead of this, as described above, in at least some embodiments, the user device 102 can collect or store history information, also referred to as mobility history information. The user device 102 can transmit the collected history information to a radio access node 104, such as the master node 202 or the secondary node 204, when the user device 102 is connected to a cell of the master or secondary node. Also, in some embodiments, in dual connectivity, the user device 102 can correlate history information (e.g., SN and MN UHI from the UE). In at least some embodiments where the first communication node is the user device 102, the user device 102 may add a time value to the UE history information from the UE IE, as defined in TS 38.331, including the mobility history report of the user device 102. In addition to or instead of this, in at least some embodiments where the first communication device is the user device 102, the time value may be included in an information response message (e.g., UEInformationResponse message) transmitted by the user device 102. Also, in any of various embodiments, the user device 102 can add a time value corresponding to a dwell time exceeding 4,095 seconds or a predetermined upper limit time value according to any of the various methods described above.

[0055] FIG. 6 shows a flowchart of an exemplary method 600 for wireless communication that includes correlating history information of user device 102. At block 602, at least one communication node can add a time value to at least one history information of user device 102, where the time value indicates the residence time of user device 102 in at least one PCell and at least one PSCell. At least one of the additional time values accurately indicates the residence time, and the residence time exceeds 4,095 seconds or exceeds a predetermined upper limit time value. At block 604, at least one communication node can generate a correlation list that correlates at least one history information of user device 102 as described above to correlate a PCell with a PSCell having an overlapping period for a given user device. Note that since at least one user history indicates the correct residence time even if the residence time exceeds 4,095 seconds or a predetermined upper limit time value, the correlated history information may not have a correlation error.

[0056] Furthermore, in various embodiments of method 600, various configurations of at least one communication node may be possible. For example, at least one communication node can include all of user device 102, master node 202, and secondary node 204, can include master node 202 and user device 102 without including secondary node 204, can include user device 102 and secondary node 204 without including master node 202, or, in any of various embodiments, can include only user device 102. Also, in various embodiments of method 600, one of the communication nodes can receive history information of user device 102 from the other of the nodes. For example, master node 202 can receive history information from secondary node 202 as described above. In such various embodiments, one communication node that performs the correlation can correlate the history information when it receives the history information from the other node.

[0057] Also, in various embodiments of method 600, at least one communication node can transmit correlation history information to the communication node, and the communication node may or may not be part of at least one communication node that adds a time value and correlates the history information. For example, master node 202 can transmit correlation history information to secondary node 204 or user device 102, secondary node 204 can transmit correlation history information to master node 202 or user device 102, user device 102 can transmit correlation history information to master node 202 or secondary node 204, or source master node 202(1) can transmit correlation history information to target master node 202(2) during handover or the like. Since the correlation history information has no correlation error even if one or more residence times exceed 4,095 seconds or a predetermined upper limit time value, the communication node that receives the correlation history information can make an optimal or correct judgment. For example, source master node 202(2) that receives correlation history information without correlation error can select an optimal secondary node or optimally determine dual connectivity.

[0058] The above description and the accompanying drawings provide specific exemplary embodiments and implementations. However, the described subject matter may be embodied in various different forms, and thus it is intended that the subject matter recited in the claims or encompassed is not limited to any of the exemplary embodiments described herein. A reasonably broad scope of the subject matter recited or encompassed in the claims is intended. In particular, for example, the subject matter may be embodied as a method, device, component, system, or non-transitory computer-readable medium for storing computer code. Thus, embodiments may take the form of, for example, hardware, software, firmware, storage media, or any combination thereof. For example, an embodiment of the method described above may be implemented by a component, device, or system including a memory and a processor by executing computer code stored in the memory.

[0059] Throughout this specification and the claims, terms may have nuanced meanings that are suggested or implied in context beyond their explicitly stated meaning. Similarly, the phrase "in one embodiment / implementation" as used herein does not necessarily refer to the same embodiment, and the phrase "in another embodiment / implementation" as used herein does not necessarily refer to different embodiments. For example, the subject matter recited in the claims is intended to include, in whole or in part, combinations of exemplary embodiments.

[0060] Generally, terms can be understood, at least in part, from their use in context. For example, terms such as "and," "or," or "and / or" as used herein can include various meanings that may depend, at least in part, on the context in which such terms are used. Typically, "or" when used to associate a list such as A, B, or C is intended to mean here A, B, and C in an inclusive sense, as well as A, B, or C in an exclusive sense here. Further, the term "one or more" as used herein can, at least in part, depend on context, be used to describe any feature, structure, or property in a singular sense, or be used to describe a combination of features, structures, or properties in a plural sense. Similarly, terms such as "a," "an," or "the" can, likewise, be understood to convey a singular usage or a plural usage, at least in part, depending on context. Further, the term "based on" may be understood not necessarily to convey an exclusive set of factors, and instead, depending at least in part on context, may allow for the presence of additional factors that are not necessarily explicitly described.

[0061] Throughout this specification, references to features, advantages, or similar language do not imply that all of the features and advantages realizable by the solution should be or are included in any single implementation. Rather, the language referring to the features and advantages means that a particular feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the solution. Thus, the descriptions of the features and advantages throughout this specification, as well as similar language, may, but do not necessarily, refer to the same embodiment.

[0062] Furthermore, the described features, advantages, and characteristics of the solution may be combined in any suitable manner in one or more embodiments. A person skilled in the art will recognize, in light of the description herein, that the solution can be implemented without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the solution.

[0063] The subject matter of the present disclosure may also, among other things, be related to or include the following aspects:

[0064] A first aspect includes a method for wireless communication, the method comprising, using a first communication node, adding a time value to the history information of a user device in response to a residence time of the user device exceeding 4,095 seconds or exceeding a predetermined upper limit time value within a cell, wherein the time value accurately indicates the residence time, and transmitting the history information including the time value to a second communication node using the communication node.

[0065] A second aspect includes the first aspect, further comprising that the residence time exceeds 4,095 seconds during which the user device stays within the cell and the time value indicates a time exceeding 4,095 seconds.

[0066] A third aspect includes the first aspect, further comprising that the time value is included in an extended residence field of an information element of the history information.

[0067] Aspect 4 includes Aspect 1, and further includes that the residence time exceeds a predetermined upper limit time value, the time value includes an extra time value corresponding to a cell in the history information, and the history information also indicates a predetermined upper limit time value corresponding to the cell.

[0068] Aspect 5 includes Aspect 4, and further includes that the history information includes a set of multiple entries related to a cell, each entry in the set includes a correspondence between the cell and one of the multiple time values, the sum of the multiple time values indicates the residence time of the user device in the cell, and the multiple time values include an extra time value and a predetermined upper limit time value.

[0069] Aspect 6 includes Aspect 5, and further includes that the history information includes a list of multiple entries for multiple cells, and the set of entries for a cell is a consecutive entry in the list.

[0070] Aspect 7 includes Aspect 1 or any one of Aspects 4 to 6, and further includes generating history information to include a list of multiple entries for multiple cells using the first communication node, each entry includes a correspondence between one of the multiple cells and one of the multiple residence times, and when the multiple cells include a primary cell (PCell), the number of multiple entries exceeds 16, or when the multiple cells include a primary-secondary cell (PSCell), the number of multiple entries exceeds 8, and at least one of these is satisfied.

[0071] Aspect 8 includes Aspect 1, and further includes that the residence time exceeds a predetermined upper limit time value, the time value includes a time stamp of the release time when the user device leaves the cell, and the time stamp corresponds to the cell in the history information.

[0072] The ninth aspect includes the first aspect, and further includes that the residence time exceeds a predetermined upper limit time value, the time value includes a time stamp among a plurality of time stamps, and each time stamp is for the additional time when the user device enters a corresponding one of the plurality of cells.

[0073] The tenth aspect includes the first aspect, and further includes that the residence time exceeds a predetermined upper limit time value, the time value includes a time stamp among a plurality of time stamps, and each time stamp is for the release time when the user device leaves a corresponding one of the plurality of cells.

[0074] The eleventh aspect includes any one of the second to fourth aspects, and further includes that the time value is included in at least one of a secondary node modification request message, a secondary node modification request confirmation response message, a secondary node change request message, a secondary release confirmation response message, or a secondary release request message.

[0075] The twelfth aspect includes any one of the first or eleventh aspects, and further includes that the first communication node includes a secondary node and the second communication node includes a master node.

[0076] The thirteenth aspect includes any one of the second to fourth aspects, and further includes that the time value is included in at least one of a handover request message, a UE context search response message, or a secondary node addition request message.

[0077] The fourteenth aspect includes any one of the first or thirteenth aspects, and further includes that the first communication node includes a source master node and the second communication node includes a target master node, or the first communication node includes a master node and the second communication node includes a secondary node.

[0078] The fifteenth aspect includes any one of the second to fourth aspects, and further includes that the time value is included in an information response message.

[0079] Aspect 16 includes any one of Aspect 1 or Aspect 15, and further includes that the first communication node includes a user device and the second communication node includes a master node.

[0080] Aspect 17 includes any one of Aspects 8 to 10, and further includes that the time stamp is included in at least one of a secondary node modification request message, a secondary node modification request confirmation response message, a secondary node change request message, a secondary release confirmation response message, or a secondary release request message.

[0081] Aspect 18 includes any one of Aspects 1 to 17, and further includes that the first communication node includes a secondary node and the second communication node includes a master node.

[0082] Aspect 19 includes any one of Aspects 8 to 10, and further includes that the time stamp is included in at least one of a handover request message, a UE context search response message, or a secondary node addition request message.

[0083] Aspect 20 includes any one of Aspect 1 or Aspect 19, and further includes that the first communication node includes a source master node and the second communication node includes a target master node, or the first communication node includes a master node and the second communication node includes a secondary node.

[0084] Aspect 21 includes any one of Aspects 80 to 10, and further includes that the time stamp is included in an information response message.

[0085] Aspect 22 includes any one of Aspect 1 or Aspect 21, and further includes that the first communication node includes a user device and the second communication node includes a master node.

[0086] The 23rd aspect includes the 1st aspect, and further includes that the residence time exceeds a predetermined upper limit time value, and the time value includes a timestamp included in at least one of a secondary node addition request confirmation response message or a secondary node change request message.

[0087] The 24th aspect includes the 23rd aspect, and further includes that the first communication node includes a secondary node and the second communication node includes a master node.

[0088] The 25th aspect includes any one of the 1st to 12th aspects, the 15th to 18th aspects, or the 21st to 24th aspects, and further includes that the cell includes a primary-secondary cell (PSCell).

[0089] The 26th aspect includes any one of the 1st to 10th aspects, the 13th to 16th aspects, or the 19th to 22nd aspects, and further includes that the cell includes a primary cell (PCell).

[0090] The 27th aspect includes a method for wireless communication, and this method includes adding a plurality of time values to at least one piece of history information of a user device by using at least one communication node, where the plurality of time values correspond to a plurality of residence times of the user device in a plurality of cells, and the time value among the plurality of time values accurately indicates a residence time exceeding 4,095 seconds or a predetermined upper limit time value, and generating correlated history information by correlating at least one piece of history information by using at least one communication node.

[0091] The 28th aspect includes the 27th aspect, and further includes transmitting the correlated history information to a second communication node by using a first communication node of at least one communication node.

[0092] Aspect 29 includes either Aspect 27 or 28, and further includes that the residence time exceeds 4,095 seconds during which the user device stays in the cell, and the time value indicates a time exceeding 4,095 seconds.

[0093] Aspect 30 includes either of Aspects 27 or 28, and further includes that the time value is included in the extended stay field of the information element of the history information.

[0094] Aspect 31 includes either Aspect 27 or 28, and further includes that the residence time exceeds a predetermined upper limit time value, the time value includes an extra time value corresponding to the cell in the history information, and the history information also indicates the predetermined upper limit time value corresponding to the cell.

[0095] Aspect 32 includes either Aspect 27 or 28, and further includes that the residence time exceeds a predetermined upper limit time value, the time value includes the time stamp of the release time when the user device leaves the cell, and the time stamp corresponds to the cell in the history information.

[0096] Aspect 33 includes either Aspect 27 or 28, and further includes that the residence time exceeds a predetermined upper limit time value, the time value includes the time stamp among a plurality of time stamps, and each time stamp is for the additional time when the user device enters the corresponding one of the plurality of cells.

[0097] Aspect 34 includes either Aspect 27 or 28, and further includes that the residence time exceeds a predetermined upper limit time value, the time value includes the time stamp among a plurality of time stamps, and each time stamp is for the release time when the user device leaves the corresponding one of the plurality of cells.

[0098] Aspect 35 includes any one of Aspects 27 or 28, and further includes that the residence time exceeds a predetermined upper limit time value, and the time value includes a timestamp included in at least one of a secondary node addition request confirmation response message or a secondary node change request message.

[0099] Aspect 36 includes a wireless communication device comprising a processor and a memory, and the processor is configured to read code from the memory to implement the method of any one of Aspects 1 to 35.

[0100] Aspect 37 includes a computer program product including a computer-readable program medium storing code, and when the code is executed by a processor, causes the processor to implement the method of any one of Aspects 1 to 35.

[0101] In addition to the features mentioned in each of the independent aspects listed above, some examples may show optional features mentioned in the dependent aspects and / or disclosed and illustrated in the above description, either alone or in combination.

Claims

1. A method for wireless communication, the method comprising: using a first communication node to add a time value to the history information of the user device in response to a residence time that exceeds 4,095 seconds or a predetermined upper limit time value for which the user device stays within the cell, the time value accurately indicating the residence time; using the communication node to transmit the history information including the time value to a second communication node The method includes.

2. The method according to claim 1, wherein the residence time exceeds 4,095 seconds during which the user device stays within the cell, and the time value indicates a time exceeding 4,095 seconds.

3. The method according to claim 1, wherein the time value is included in an extended residence field of an information element of the history information.

4. The method according to claim 1, wherein the residence time exceeds the predetermined upper limit time value, the time value includes an extra time value corresponding to the cell in the history information, and the history information also indicates the predetermined upper limit time value corresponding to the cell.

5. The method according to claim 4, wherein the history information includes a set of a plurality of entries related to the cell, each entry in the set includes a correspondence between the cell and one of a plurality of time values, the sum of the plurality of time values indicates the residence time of the user device within the cell, and the plurality of time values include the extra time value and the predetermined upper limit time value.

6. The method according to claim 5, wherein the history information includes a list of a plurality of entries for a plurality of cells, and the set of entries for the cell is consecutive entries in the list.

7. The method according to claim 1, further comprising using the first communication node to generate the history information to include a list of a plurality of entries for a plurality of cells, each entry including a correspondence between one of the plurality of cells and one of a plurality of residence times, when the plurality of cells includes a primary cell (PCell), the number of the plurality of entries exceeds 16, or when the plurality of cells includes a primary and secondary cell (PSCell), the number of the plurality of entries exceeds 8 At least one of them. The method according to claim 1.

8. The residence time exceeds the predetermined upper limit time value, the time value includes a time stamp of the release time when the user device leaves the cell, and the time stamp corresponds to the cell in the history information. The method according to claim 1.

9. The residence time exceeds the predetermined upper limit time value, the time value includes a time stamp among a plurality of time stamps, and each time stamp is for additional time when the user device enters a corresponding one of the plurality of cells. The method according to claim 1.

10. The residence time exceeds the predetermined upper limit time value, the time value includes a time stamp among a plurality of time stamps, and each time stamp is for the release time when the user device leaves a corresponding one of the plurality of cells. The method according to claim 1.

11. The time value is included in at least one of a secondary node correction request message, a secondary node correction request confirmation response message, a secondary node change request message, a secondary release confirmation response message, or a secondary release request message. The method according to any one of claims 2 to 4.

12. The first communication node includes a secondary node, and the second communication node includes a master node. The method according to claim 1 or 11.

13. The time value is included in at least one of a handover request message, a UE context search response message, or a secondary node addition request message. The method according to any one of claims 2 to 4.

14. The first communication node includes a source master node, and the second communication node includes a target master node, or The first communication node includes a master node, and the second communication node includes a secondary node, The method according to any one of claims 1 or 13.

15. The time value is included in an information response message. The method according to any one of claims 2 to 4.

16. The first communication node includes a user device, and the second communication node includes a master node. The method according to claim 1 or 15.

17. The method according to any one of claims 8 to 10, wherein the timestamp is included in at least one of a secondary node modification request message, a secondary node modification request confirmation response message, a secondary node change request message, a secondary release confirmation response message, or a secondary release request message.

18. The method according to claim 1 or 17, wherein the first communication node includes a secondary node and the second communication node includes a master node.

19. The method according to any one of claims 8 to 10, wherein the timestamp is included in at least one of a handover request message, a UE context search response message, or a secondary node addition request message.

20. The first communication node includes a source master node, the second communication node includes a target master node, or the first communication node includes a master node and the second communication node includes a secondary node, The method according to any one of claims 1 or 19.

21. The method according to any one of claims 8 to 10, wherein the timestamp is included in an information response message.

22. The method according to claim 1 or 21, wherein the first communication node includes a user device and the second communication node includes a master node.

23. The method according to claim 1, wherein the residence time exceeds the predetermined upper limit time value, and the time value includes a timestamp included in at least one of a secondary node addition request confirmation response message or a secondary node modification request message.

24. The method according to claim 23, wherein the first communication node includes a secondary node and the second communication node includes a master node.

25. The method according to any one of claims 1 to 12, 15 to 18, or 21 to 24, wherein the cell includes a primary secondary cell (PSCell).

26. The method according to any one of claims 1 to 10, 13 to 16, or 19 to 22, wherein the cell includes a primary cell (PCell).

27. A method for wireless communication, the method comprising: Using at least one communication node, adding a plurality of time values to at least one piece of history information of a user device, wherein the plurality of time values correspond to a plurality of residence times of the user device in a plurality of cells, and the time value among the plurality of time values accurately indicates a residence time exceeding 4,095 seconds or a predetermined upper limit time value, and using the at least one communication node to correlate the at least one piece of history information to generate correlated history information A method comprising the steps of:

28. Transmitting the correlated history information to a second communication node using a first communication node of the at least one communication node The method according to claim 27, further comprising the steps of:

29. The method according to claim 27, wherein the residence time exceeds 4,095 seconds during which the user device stays in the cell, and the time value indicates a time exceeding 4,095 seconds.

30. The method according to claim 27, wherein the time value is included in an extended stay field of an information element of the history information.

31. The method according to claim 27, wherein the residence time exceeds the predetermined upper limit time value, the time value includes an extra time value corresponding to the cell in the history information, and the history information also indicates the predetermined upper limit time value corresponding to the cell.

32. The method according to claim 27, wherein the residence time exceeds the predetermined upper limit time value, the time value includes a time stamp of a release time when the user device leaves the cell, and the time stamp corresponds to the cell in the history information.

33. The method according to claim 27, wherein the residence time exceeds the predetermined upper limit time value, the time value includes a time stamp among a plurality of time stamps, and each time stamp is for an additional time when the user device enters a corresponding one of the plurality of cells.

34. The method according to claim 27, wherein the residence time exceeds the predetermined upper limit time value, the time value includes a time stamp among a plurality of time stamps, and each time stamp is for a release time when the user device leaves a corresponding one of the plurality of cells.

35. The method according to claim 27, wherein the residence time exceeds the predetermined upper limit time value, and the time value includes a timestamp included in at least one of a secondary node addition request confirmation response message or a secondary node change request message.

36. A wireless communication device comprising a processor and a memory, wherein the processor is configured to read code from the memory to implement the method according to any one of claims 1 to 35.

37. A computer program product comprising a computer-readable program medium containing stored code, wherein the code causes the processor to implement the method according to any one of claims 1 to 35 when executed by the processor.

Images