MODIFICATION OF SERVICE QUALITY PROFILE FOR MULTI-QoS PROFILE SESSION

Abstract

To provide an enhancement regarding profile processing for communication via a session associated with a plurality of QoS profiles.SOLUTION: In a wireless communication system, a UE communicates via a session such as a PDU session when executing a particular application. The session is associated with a current QoS profile, the current QoS profile is selected from a plurality of different QoS profiles associated with the session. The wireless communication system replaces the current QoS profile of the session with a new QoS profile for the session in a case of a particular event. The new QoS profile is selected from a subset or all of the plurality of different QoS profiles associated with the session and / or one or more QoS profiles which have not yet been associated with the session.SELECTED DRAWING: Figure 4(a)

Description

[Technical field]

[0001] The present application relates to the field of wireless communication systems or networks, and more particularly to enhancements relating to quality of service (QoS) profile handling for communication over a session associated with multiple QoS profiles, also referred to as a multi-QoS profile session. Embodiments of the invention relate to application of a preferred QoS profile in the event of a particular event in the network, such as a change in one or more network conditions, or in the event of a handover. [Background technology]

[0002] FIG. 1 illustrates a core network 102 and one or more radio access networks RAN1, RAN2, ...RAN N FIG. 1(b) is a schematic diagram of an example of a terrestrial wireless network 100 including a radio access network RAN, which may include one or more base stations gNB1 to gNB5. n1 is a schematic diagram of an example of a wireless communication system, each serving a particular area surrounding the base station, represented diagrammatically by a respective cell 1061-1065. The base station is provided to serve users within the cell. One or more base stations can serve users in licensed and / or unlicensed bands. The term base station (BS) refers to a gNB in ​​5G networks, an eNB in ​​UMTS / LTE / LTE-A / LTE-A Pro, or simply a BS in other mobile communication standards. A user may be a fixed or mobile device. The wireless communication system may also be accessed by a mobile or fixed IoT device that connects to a base station or a user. The mobile or IoT device may include physical devices, ground-based vehicles such as robots or cars, aircraft such as manned or unmanned aerial vehicles (UAVs) (the latter also called drones), buildings, and other items or devices embedded with electronics, software, sensors, actuators, etc., as well as network connections that enable these devices to collect and exchange data across existing network infrastructure. FIG. 1(b) shows an example diagram of five cells, n may contain more or fewer such cells, and the RAN nmay include only one base station. Fig. 1(b) shows two users UE1 and UE2, also called user equipment UE, in a cell 1062 and served by a base station gNB2. Another user UE3 is shown in a cell 1064 served by a base station gNB4. Arrows 1081, 1082 and 1083 represent diagrammatically the uplink / downlink connections for transmitting data from users UE1, UE2 and UE3 to the base stations gNB2, gNB4 or from the base stations gNB2, gNB4 to users UE1, UE2, UE3. This may be realized in licensed or unlicensed bands. Furthermore, Fig. 1(b) shows two IoT devices 1101 and 1102 in the cell 1064, which may be fixed or mobile devices. The IoT device 1101 accesses the wireless communication system via the base station gNB4 to transmit and receive data, as diagrammatically represented by the arrow 1121. The IoT device 1102 accesses the wireless communication system via a user UE 3, as represented diagrammatically by the arrow 1122. Each base station gNB1-gNB5 may be connected to the core network 102 via respective backhaul links 1141-1145, e.g. via an S1 interface, which are diagrammatically represented in FIG. 1(b) by an arrow pointing to "core". The core network 102 may be connected to one or more external networks. Furthermore, some or all of each base station gNB1-gNB5 may be connected to each other via respective backhaul links 1161-1165, e.g. via an S1 or X2 interface or an XN interface in NR, which are diagrammatically represented in FIG. 1(b) by an arrow pointing to "gNB". Sidelink channels enable direct communication between UEs, also called device-to-device (D2D) communication. The sidelink interface in 3GPP (registered trademark, the same below) is called PC5.

[0003] For data transmission, a physical resource grid may be used, which may include a set of resource elements onto which various physical channels and physical signals are mapped. For example, the physical channels may include physical downlink shared channels, physical uplink shared channels, and physical sidelink shared channels (physical downlink shared channels: PDSCH, physical uplink shared channels: PUSCH, physical sidelink shared channels: PSSCH) carrying user-specific data, also referred to as downlink, uplink, and sidelink payload data, a physical broadcast channel (physical broadcast channel: PBCH) carrying, e.g., a master information block (MIB) and one or more system information blocks (SIBs), a physical downlink control channel, physical uplink control channel, and physical sidelink control channels (physical downlink control channels: PDCCH, physical uplink control channels: PUCCH, physical sidelink control channels: PSSCH) carrying, e.g., downlink control information (DCI), uplink control information (UCI), and sidelink control information (SCI). For the uplink, the physical channels may further include a physical random access channel (PRACH or RACH) used by the UE to access the network once the UE has synchronized and acquired the MIB and SIB. The physical signals may include reference signals or symbols (RS), synchronization signals, etc.The resource grid may comprise a frame or radio frame having a certain duration in the time domain and a given bandwidth in the frequency domain. The frame may have a certain number of subframes of a certain length, e.g. 1 ms. Each subframe may contain one or more slots of 12 or 14 OFDM symbols depending on the cyclic prefix (CP) length. The frame may also consist of fewer OFDM symbols, e.g. when utilizing shortened transmission time intervals (sTTI), or a minislot / non-slot based frame structure containing only a few OFDM symbols.

[0004] The wireless communication system may be any single-tone or multi-carrier system using frequency division multiplexing, such as an orthogonal frequency-division multiplexing (OFDM) system, an orthogonal frequency-division multiple access (OFDMA) system, or other IFFT-based signals with or without CP, e.g., DFT-s-OFDM. Other waveforms, such as non-orthogonal waveforms for multiple access, e.g., filter-bank multicarrier (FBMC), generalized frequency division multiplexing (GFDM) or universal filtered multi carrier (UFMC), may also be used. The wireless communication system may operate, for example, according to the LTE-Advanced pro standard, or the 5G or New Radio (NR) standard, or the New Radio Unlicensed (NR-U) standard.

[0005] The wireless network or communications system shown in Figure 1 may also be a heterogeneous network with separate overlay networks, for example a network of macro cells with each macro cell comprising a macro base station such as base stations gNB1 to gNB5, and a network of small cell base stations such as femto base stations or pico base stations (not shown in Figure 1).

[0006] In addition to the terrestrial wireless networks described above, there are also non-terrestrial wireless communication networks (NTNs) that include space-based transceivers such as satellites and / or airborne transceivers such as unmanned aerial systems. Non-terrestrial wireless communication networks or systems may operate similarly to the terrestrial system described above with reference to FIG. 1, for example according to the LTE-Advanced Pro standard or the 5G or NR emerging wireless standard.

[0007] Please note that the information in the above sections is merely intended to enhance understanding of the background of the present invention, and thus may contain information that does not form part of prior art already known to those skilled in the art. In view of the prior art as described above, there may be a need for improved communications in wireless communication systems over sessions associated with multiple QoS profiles. Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of an example of a wireless communication system. [Diagram 2] FIG. 1 illustrates an example for establishing a session using multiple QoS profiles. [Diagram 3] 1 is a schematic diagram of a wireless communication system including a transmitter, such as a base station, and one or more receivers, such as user devices (UEs). [Figure 4(a)]FIG. 1 illustrates one embodiment of the present invention for replacing a QoS profile currently in use for a session with a new QoS profile. [Figure 4(b)] A diagram illustrating a further embodiment of the present invention in which the QoS profile currently used for the session is replaced with a new QoS profile obtained from the SMF or the core network. [Diagram 5] A diagram showing a network controlled handover from a serving base station or source base station or gNB to a target base station or gNB. [Figure 6] A diagram showing a conditional handover (CHO) from a serving base station or source base station or gNB to a target base station or gNB. [Figure 7] FIG. 2 illustrates an embodiment of the present invention implementing the inventive technique during a non-conditional handover procedure. [Figure 8] FIG. 1 illustrates one embodiment of the present invention in which a subset of QoS profiles or multiple QoS profiles are obtained by the target gNB from either the core network or the UE. [Figure 9] FIG. 1 illustrates one embodiment of the present invention for conditional handover (CHO) in which a QoS profile is obtained by a source gNB from a UE and forwarded to one or more potential target gNBs. [Figure 10] FIG. 13 illustrates another embodiment of the present invention for conditional handover (CHO), in which a QoS profile or information about the QoS profile is obtained by the target gNB either directly from the UE or from one or more network entities. [Figure 11] FIG. 1 illustrates an example of a computer system in which the units or modules and method steps described according to the present technique can be executed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings, in which the same or similar elements are assigned the same reference numerals.

[0010] In a wireless communication system, such as the one described above with reference to FIG. 1, a user device (UE) may execute a particular application. When executing such an application, the user device may communicate via a session, such as a protocol data unit (PDU) session. Such a session may be associated with multiple QoS profiles. The network selects one (or more) QoS profile(s). A QoS bearer supporting the selected QoS profile(s) may be established, for example by a procedure as described in reference [1], the bearer supporting / handling the selected one for the time being. FIG. 2 illustrates an example for establishing a session associated with multiple QoS profiles according to reference [1]. FIG. 2 illustrates respective system or network entities of a wireless communication system, such as the system described above with reference to FIG. 1, namely, a user device (UE), a radio access network, a RAN including the base stations as mentioned above, and some elements of the core network, such as a session management function (SMF), a policy control function (PCF), a network exposure function (NEF), and an application function (AF).

[0011] An application function may negotiate and request a PDU session associated with multiple QoS profiles, e.g., a main QoS profile and several alternate QoS profiles. A QoS profile may include one or more QoS parameters or metrics. The QoS parameters or metrics may include: - data rate, such as peak data rate or average data rate, -Allocation or specific data volume, - Burst size, -Latency, -delay, -Jitter, - Reliability, -Bit Error Rate (BER) requirements, -Packet Data Rate (PER) requirements, -Packet loss, - goodput, which indicates, for example, the amount of valid data received, i.e., data that can be correctly decoded and verified by a cyclic redundancy checksum (CRC), - Priority, -5G QoS Identifier (5QI) may include one or more of:

[0012] While the terms latency and delay above may be used interchangeably, there may be differences: delay refers to the amount of time it takes for the first bit to travel over the link between the sender and receiver, while latency refers to the total amount of time it takes to transmit the entire message.

[0013] The multiple QoS profiles associated with a session may include a first QoS profile and one or more second QoS profiles. The first QoS profile may be a most preferred QoS profile of the session, also referred to as the aforementioned main QoS profile. The first QoS profile or the main QoS profile may provide the most preferred or highest QoS of an application when executing the application. The two or more second QoS profiles, also referred to as the aforementioned alternative QoS profiles, are QoS profiles of the session that are less preferred than the first QoS profile. According to an embodiment, the one or more second or alternative QoS profiles may have a lower priority for the session.

[0014] In FIG. 2, an application function negotiates and requests a PDU session with multiple QoS profiles (1). The multiple QoS profiles may include a main profile and several alternative QoS profiles, as described above. Once a multiple profile QoS session is determined, the SMF requests QoS profiles that the RAN can support from the radio access network (2). The RAN returns one or more supported profiles from the multiple QoS profiles for the session to the SMF (3). The SMF determines which profile to use from the multiple QoS profiles (4) and signals the selected QoS profile to the RAN (5). In response to the selected QoS profile, the RAN establishes a bearer flow to the UE using the selected QoS profile (6). Once a bearer with the selected QoS profile is established, the session associated with the multiple QoS profiles operates with the selected QoS profile (7).

[0015] If the wireless communication system or network attempts to provide the main QoS profile but the RAN is unable to provide the main QoS profile, the RAN may respond with one or more of the alternative QoS profiles it may support, as shown in "3.", and the SMF may instruct the RAN to choose one of the profiles and establish a bearer supporting the QoS profile, as shown in "4." to "6." of FIG. 2.

[0016] The priority of a QoS profile, i.e. whether the QoS profile is the main profile or the most preferred profile or whether the QoS profile has a lower priority than the main QoS profile, may be determined by an application, e.g. an application function, and / or by a user device (UE). The decision on the preference may use one or more combinations of the above QoS parameters or metrics, e.g. by applying a cost function. The QoS profile may also be determined by other network entities, e.g. by an SMF in a 5G core network (5G CN), in the EPC (evolved packet core) or any other core network entity, such as a V2X application server or media server, or by a base station or other core network entity, such as a mobility management entity (MME). The QoS priority may also be determined over-the-top (OTT), e.g. by another entity connected to the UE via the Internet.

[0017] During a session associated with multiple QoS profiles currently operating with a particular QoS profile selected in the manner described above with reference to Figure 2, conditions within the network may change, e.g., a change in network conditions or network capabilities, or a particular event such as the occurrence of a handover or conditional handover (CHO), may occur such that the selected QoS profile currently being used for the session may no longer be the most preferred QoS profile, or the network may be able to provide a QoS profile that is more preferred than the current QoS profile, or the network may not be able to continue providing the current QoS profile. In other words, there may be situations during a session where the QoS profile currently being used is no longer the most preferred by the system, e.g., because the RAN may no longer be in a position to support the selected QoS profile, or because it is determined that a more preferred QoS profile may be used.

[0018] The present invention provides improvements and enhancements to a wireless communication system or network that address the above-mentioned problems with QoS profiles used when conditions within the wireless communication system or network change. An embodiment of the present invention provides a technique that allows for determining within the system or network a new QoS profile that can be used as a new QoS profile, e.g., a QoS profile that can replace a current QoS profile. For example, a more preferred or less preferred QoS profile may be selected to be used for a session, the new QoS profile being selected from some or all of a plurality of QoS profiles associated with the session. The newly selected QoS profile may be the same as the current profile. The selection of a new QoS profile from some or all of a plurality of QoS profiles associated with a session may be performed in the event of a particular event recognized within the system or network, e.g., in the event of a change in network conditions or network capabilities, or in the event of a handover event or a conditional handover event.

[0019] The present invention provides improvements and enhancements to wireless communication systems that address the above-mentioned problems. An embodiment of the present invention can be implemented in a wireless communication system as shown in FIG. 1, including a base station and a user, such as a mobile terminal or IoT device. FIG. 3 is a schematic diagram of a wireless communication system including a transmitter 300, such as a base station, and one or more receivers 302, 304, such as user devices (UE). The transmitter 300 and receivers 302, 304 can communicate via one or more wireless communication links or channels 306a, 306b, 308, such as radio links. The transmitter 300 includes one or more antennas ANT (antennas) having multiple antenna elements coupled together. T Alternatively, the receivers 302, 304 may include an antenna array, a signal processor 300a and a transceiver 300b. UEor an antenna array having multiple antennas, signal processors 302a, 304a, and transceivers 302b, 304b. The base station 300 and the UEs 302, 304 may communicate with each other via respective first wireless communication links 306a and 306b, such as a wireless link using a Uu interface, and the UEs 302, 304 may communicate with each other via a second wireless communication link 308, such as a wireless link using a PC5 / sidelink (SL) interface. When the UEs are not served by the base station, when the UEs are not connected to the base station, e.g., when the UEs are not in an RRC connected state, or more generally, when no SL resource allocation configuration or assistance is provided by the base station, the UEs may communicate with each other via the sidelink (SL). The system or network of FIG. 3, the one or more UEs 302, 304, and the base station 300 may operate in accordance with the teachings of the present invention described herein.

[0020] Wireless communication system An embodiment of the present invention provides a wireless communication system (see, for example, claim 1), the wireless communication system comprising: one or more base stations; one or more user devices (UEs); When the UE executes a particular application, the UE communicates via a session, such as a PDU session, the session being associated with a current Quality of Service (QoS) profile, the current QoS profile being selected from a plurality of different QoS profiles associated with the session; The wireless communication system is for, in the event of a particular event, replacing a current QoS profile for a session with a new QoS profile for the session, the new QoS profile being selected from a subset or all of a plurality of different QoS profiles associated with the session and / or one or more QoS profiles not already associated with the session.

[0021] According to an embodiment (see, for example, claim 2), the QoS profile comprises one or more QoS parameters or metrics, the one or more QoS parameters or metrics being: - data rate, - Peak or average data rate, -Allocation or specific data volume, - Burst size, -Latency, -delay, -Jitter, - Reliability, -Bit Error Rate (BER) or Packet Data Rate (PER) requirements, -Packet loss, -Goodput - Priority, -5G QoS Identifier (5QI) may include one or more of:

[0022] According to an embodiment (see, e.g., claim 3), the multiple QoS profiles associated with the session include a first QoS profile and one or more second QoS profiles, where the first QoS profile is a most preferred QoS profile for the session and the one or more second QoS profiles are less preferred QoS profiles than the first QoS profile for the session. According to an embodiment (see, for example, claim 4), the second QoS profile or profiles have a low priority for the session.

[0023] According to an embodiment (see e.g. claim 5), the priority of the QoS profile is determined using one or more combinations of the multiple QoS parameters or metrics, e.g. by applying a cost function, the priority of the QoS profile being determined by: -Application, and / or -UE, and / or - one or more core network entities of a wireless communication system; and / or - over-the-top (OTT), for example by another entity connected to the UE via the Internet; is determined by.

[0024] According to an embodiment (see, for example, claim 6), a particular event is: -Changes in one or more network conditions, such as additional or fewer resources becoming available to serve the UE, or changes due to carrier aggregation (CA) or dual connectivity (DC) becoming or no longer available to serve the UE, or changes in channel conditions; -Handover (HO) from a serving base station or a source base station to a target base station, -Conditional handover (CHO) from a serving base station or a source base station to a target base station; Includes one or more of:

[0025] According to an embodiment (see, e.g., claim 7), the UE is served by a serving base station and the wireless communication system, e.g. the serving base station or one or more core network entities of the wireless communication system, decides from which new QoS profile the serving base station will provide when network conditions change.

[0026] According to an embodiment (see, for example, claim 8), when the serving base station determines a new QoS profile, the serving base station: - obtaining a subset or all of a plurality of QoS profiles for the session from the UE or from a core network of the wireless communication system or from another entity connected to the UE, e.g. via the Internet, either directly via Over-the-Top (OTT) or indirectly, e.g. via an intermediate device; and / or - obtaining information indicative of a subset or all of the multiple QoS profiles for the session, such as an index pointing to a particular QoS profile, from the UE or from a core network of the wireless communication system or via Over-the-Top (OTT) from another entity connected to the UE, e.g. via the Internet, either directly or indirectly, e.g. via an intermediate device; and / or storing a subset or all of the multiple QoS profiles for the session; and / or -It stores information indicating a subset or all of multiple QoS profiles for a session, such as an index pointing to a specific QoS profile.

[0027] According to an embodiment (see, e.g., claim 9), the serving base station includes a request for a subset or all of the multiple QoS profiles in a request, e.g. a measurement request to the UE, and the UE includes the requested QoS profile or information indicative of the requested QoS profile in a report, e.g. a measurement report of the serving base station.

[0028] According to an embodiment (see, for example, claim 10), the subset of the multiple different QoS profiles may be, for example: one or more QoS profiles having a lower priority than the current profile, for example obtained in the case of a downgrade situation; one or more QoS profiles having a higher priority than the current profile, such as top n QoS profiles, e.g. obtained in case of an upgrade situation; one or more QoS profiles including one or more QoS parameters or metrics having values ​​that meet a certain criteria, e.g., latency lower or higher than a delay threshold, or data rate lower or higher than a data rate threshold, or values ​​within a certain range; may include.

[0029] According to an embodiment (see, for example, claim 11), the serving base station provides the UE with a new QoS profile or information indicative of the new QoS profile, or the UE requests the serving base station with a new QoS profile or information indicative of the new QoS profile.

[0030] According to an embodiment (see e.g. claim 12), the UE is served by a serving base station and in case of handover (HO) from the serving base station or the source base station to a target base station, the wireless communication system, e.g. the target base station or one or more core network entities of the wireless communication system, determines a new or allowed QoS profile to be provided by the target base station, which is the same as or different from a current QoS profile or a source QoS profile provided by the source base station before the HO.

[0031] According to an embodiment (see, e.g., claim 13), after the HO is completed, the target base station provides an authorized QoS profile for the session, which is different from the current QoS profile or the source QoS profile provided by the source base station before the HO, e.g. a QoS profile having a higher or lower priority than the source QoS profile.

[0032] According to an embodiment (see, for example, claim 14), during HO the source base station: - obtaining a subset or all of a plurality of QoS profiles for the session, or information indicative of a subset or all of a plurality of QoS profiles for the session, from the UE, or from a core network of the wireless communication system, or from a memory of the source base station, or over-the-top (OTT) from another entity connected to the UE, e.g. via the Internet; - including the obtained QoS profile or the obtained information in the HO request; - sending an HO request to the target base station including the obtained QoS profile or the obtained information; The present invention is directed to performing one or more of the following:

[0033] According to an embodiment (see, e.g., claim 15), the source base station includes a request for a subset or all of the multiple QoS profiles in a request, e.g. a measurement request to the UE, and the UE includes the requested QoS profile or information indicative of the requested QoS profile in a report, e.g. a measurement report of the source base station.

[0034] According to an embodiment (see e.g. claim 16), during HO the target base station may transmit a subset or all of the multiple QoS profiles for the session or information indicative of a subset or all of the multiple QoS profiles for the session, -Application, and / or -UE, and / or - one or more core network entities of a wireless communication system; and / or Over-the-top (OTT), for example by another entity connected to the UE via the Internet; The information is taken from one or more of the following:

[0035] According to an embodiment (see, for example, claim 17), the subset of the multiple different QoS profiles may be, for example: one or more QoS profiles having a lower priority than the source profile, for example obtained in the case of a downgrade situation; one or more QoS profiles having a higher priority than the source profile, such as top n QoS profiles, e.g. obtained in case of an upgrade situation; one or more QoS profiles including one or more QoS parameters or metrics having values ​​that meet a certain criteria, e.g., latency lower or higher than a delay threshold, or data rate lower or higher than a data rate threshold, or values ​​within a certain range; may include.

[0036] According to an embodiment (see e.g. claim 18), during HO the target base station may, for example, if a new or allowed QoS profile is different from the current QoS profile or the source QoS profile provided by the source base station before the HO: - including an allowed QoS profile or information indicating the permitted QoS profile in the HO response, - Sending an HO response to the source base station; It is something.

[0037] According to an embodiment (see e.g. claim 19), during or after the HO, the source base station provides the UE with information indicating the QoS profile allowed by the target base station or the QoS profile allowed by the target base station, e.g. if the new or allowed QoS profile differs from the current QoS profile or the source QoS profile provided by the source base station before the HO.

[0038] According to an embodiment (see, for example, claim 20), when switching to a target base station, the UE requests an allowed QoS profile or information indicative of the allowed QoS profile from the target base station. According to an embodiment (see, for example, claim 21), the HO is a Conditional Handover (CHO).

[0039] According to an embodiment (see, for example, claim 22), two or more target base stations determine respective new or allowed QoS profiles that each target base station can provide, and if a conditional handover condition is met, the UE switches to a target base station that provides a more preferred allowed QoS profile.

[0040] According to an embodiment (see, for example, claim 23): The one or more UEs include one or more of a mobile terminal, or a fixed terminal, or a cellular IoT-UE, or a vehicular UE, or a vehicle group leader (GL) UE, or an IoT, or a narrowband IoT (NB-IoT) device, or a WiFi non-access point station (non-AP STA), e.g., 802.11ax or 802.11be, or a ground-based vehicle, or an air vehicle, or a drone, or a mobile base station, or a roadside unit, or a building, or any other item or device with a network connection that enables it to communicate using a wireless communication network, e.g., a sensor or an actuator; and / or The one or more base stations include one or more of a macro cell base station, or a small cell base station, or a base station central unit, or a base station distributed unit, or a roadside unit, or a UE, or a group leader (GL), or a repeater, or a remote radio head, or an AMF, or an SMF, or a core network entity, or a mobile edge computer entity, or a network slice such as an NR or 5G core context, or a WiFi AP STA, e.g., 802.11ax or 802.11be, or any transmit / receive point (TRP) that enables an item or device to communicate using a wireless communication network and where an item or device is provided with a network connection to communicate using a wireless communication network.

[0041] According to an embodiment (see, for example, claim 24), the UE is Periodically transmitting a subset or all of the multiple QoS profiles, or information indicative of the QoS profiles; or transmitting a subset or all of the multiple QoS profiles, or information indicative of the QoS profiles, in response to a triggered event, for example when a measurement exceeds a particular threshold, or in response to a beam failure event, or in response to a particular change in channel conditions; It is configured to report a subset or all of the multiple QoS profiles.

[0042] According to an embodiment (see, e.g., claim 25), the wireless communication system applies a new QoS profile for a particular time, e.g., in response to a particular event, determining that a particular event is likely to occur at a particular time for a particular duration, before the wireless communication system falls back to the current QoS profile.

[0043] User Device An embodiment of the present invention provides a user device (UE) for a wireless communication system (see, for example, claim 26), comprising: A UE is served by a serving base station, and when the UE executes a particular application, it communicates via a session, such as a PDU session, which is associated with a current Quality of Service (QoS) profile, which is selected from a number of different QoS profiles associated with the session.

[0044] According to an embodiment (see e.g. claim 27), in case of a certain event, the UE provides to the serving base station information indicating a subset or all of a plurality of QoS profiles for the session, or a subset or all of a plurality of QoS profiles for the session, to enable the serving base station to replace the current QoS profile of the session with a new QoS profile for the session, the new QoS profile being selected from a subset or all of a plurality of different QoS profiles associated with the session.

[0045] According to an embodiment (see e.g. claim 28), if the particular event is a handover (HO) or a conditional handover (CHO) from the serving base station or the source base station to the target base station, the UE provides information indicating a subset or all of the multiple QoS profiles of the session, or a subset or all of the multiple QoS profiles of the session, to the source base station and / or the target base station, to enable the target base station to replace the current QoS profile of the session with a new or allowed QoS profile for the session.

[0046] According to an embodiment (see, for example, claim 29), the UE is receiving a request, e.g. a measurement request including a request for a subset or all of the multiple QoS profiles, from a source base station and including the requested QoS profile or information indicative of the requested QoS profile in a report, e.g. a source base station measurement report; and / or - in response to a handover trigger, providing a report to the source base station including information indicating a subset or all of the multiple QoS profiles for the session, or a subset or all of the multiple QoS profiles for the session.

[0047] According to an embodiment (see, for example, claim 30), the UE is Periodically transmitting a subset or all of the multiple QoS profiles, or information indicative of the QoS profiles; or transmitting a subset or all of the multiple QoS profiles, or information indicative of the QoS profiles, in response to a triggered event, for example when a measurement exceeds a particular threshold, or in response to a beam failure event, or in response to a particular change in channel conditions; It is configured to report a subset or all of the multiple QoS profiles.

[0048] According to an embodiment (see, for example, claim 31), the UE is receiving information from the source base station and / or from the target base station before, during or after the HO indicating a QoS profile allowed by the target base station or a QoS profile allowed by the target base station; or After switching to the target base station, the QoS profile allowed by the target base station or information indicating the QoS profile allowed by the target base station is requested from the target base station.

[0049] According to an embodiment (see, for example, claim 32): In the case of a conditional handover (CHO), the UE provides to two or more target base stations a subset or all of the multiple QoS profiles for the session, or information indicative of the subset or all of the multiple QoS profiles for the session, to enable the target base stations to determine respective new or allowed QoS profiles that each target base station may provide; If a conditional handover condition is met, the UE shall switch to a target base station that offers a more favorable allowed QoS profile.

[0050] According to an embodiment (see, e.g., claim 33), the user device receives an indication from the wireless communication system that a new QoS profile should be applied at a particular time, e.g. in response to a determination that a particular event is likely to occur at a particular time, e.g. for a particular period of time, before the wireless communication system falls back to the current QoS profile. base station

[0051] An embodiment of the present invention provides a base station for a wireless communication system (see, for example, claim 34), comprising: The base station provides services to user devices (UEs) of the wireless communication system, the UEs communicating via sessions, such as PDU sessions, when executing a particular application, the sessions being associated with a current Quality of Service (QoS) profile, the current QoS profile being selected from a number of different QoS profiles associated with the session; In the event of a particular event, the base station replaces the current QoS profile of the session with a new QoS profile for the session, the new QoS profile being selected from a subset or all of a number of different QoS profiles associated with the session and / or one or more QoS profiles not already associated with the session.

[0052] According to an embodiment (see for example claim 35), the base station comprises: - deriving a subset or all of the multiple QoS profiles for the session from the UE or from a core network of the wireless communication system or from another entity connected to the UE over-the-top (OTT), e.g. via the Internet; and / or - obtaining information indicating a subset or all of a plurality of QoS profiles for the session from the UE, or from a core network of the wireless communication system, or from another entity connected to the UE, over the top (OTT), e.g. via the Internet, such as an index pointing to a particular QoS profile; and / or - storing a subset or all of the multiple QoS profiles for the session; and / or -It stores information indicating a subset or all of multiple QoS profiles for a session, such as an index pointing to a specific QoS profile.

[0053] According to an embodiment (see, for example, claim 36), if the particular event is a handover (HO) or a conditional handover (CHO) from the base station to the target base station, the base station provides information indicating a subset or all of the multiple QoS profiles of the session to the target base station, or a subset or all of the multiple QoS profiles of the session, to enable the target base station to replace the current QoS profile of the session with a new or allowed QoS profile for the session.

[0054] According to an embodiment (see e.g. claim 37), in case of a conditional handover (CHO), the base station provides two or more target base stations with a subset or all of the multiple QoS profiles of the session, or information indicating a subset or all of the multiple QoS profiles of the session, so as to enable the target base stations to determine respective new or allowed QoS profiles that each target base station may provide. Target base station

[0055] An embodiment of the present invention provides a base station for a wireless communication system (see, e.g., claim 38), the wireless communication system including a UE served by a source base station, the UE communicating via a session, such as a PDU session, when executing a particular application, the session being associated with a current Quality of Service (QoS) profile, the current QoS profile being selected from a plurality of different QoS profiles associated with the session; In the case of handover (HO) from a source base station to a target base station, the target base station obtaining a subset or all of a plurality of QoS profiles for the session, or information indicative of a subset or all of a plurality of QoS profiles for the session; - Select a new or authorized QoS profile for the session provided by the target base station, where the new or authorized QoS profile is the same as or different from the current QoS profile or the source QoS profile provided by the source base station before the HO.

[0056] According to an embodiment (see e.g. claim 39), during the HO the base station obtains a subset or all of a plurality of QoS profiles for the session, or information indicative of a subset or all of a plurality of QoS profiles for the session, from a source base station, or from a core network of the wireless communication system, or from a memory of the target base station, or from another entity attached to the UE over-the-top (OTT), e.g. via the Internet.

[0057] According to an embodiment (see, for example, claim 40), the base station may further provide information indicating the QoS profile authorized by the target base station or the QoS profile authorized by the target base station, e.g. in case the new or authorized QoS profile is different from the current QoS profile or the source QoS profile provided by the source base station before the HO, such as: - before or during HO, via the source base station, or After the UE switches to the target base station, It is what we provide.

[0058] method An embodiment of the present invention provides a method for communication in a wireless communication system (see, for example, claim 41), the wireless communication system including one or more base stations and one or more user devices (UE), the method comprising: communicating via a session, such as a PDU session, when executing a particular application by the UE, the session being associated with a current Quality of Service (QoS) profile, the current QoS profile being selected from a plurality of different QoS profiles associated with the session; In case of a particular event, replacing a current QoS profile for the session with a new QoS profile for the session, the new QoS profile being selected from a subset or all of a plurality of different QoS profiles associated with the session and / or one or more QoS profiles not already associated with the session; Includes.

[0059] An embodiment of the present invention provides a method for communication in a wireless communication system (see, for example, claim 42), the wireless communication system including one or more base stations and one or more user devices (UE), the method comprising: Serving the UE is serviced by a serving base station; The method includes the steps of: communicating via a session, such as a PDU session, when executing a particular application by the UE, the session being associated with a current Quality of Service (QoS) profile, the current QoS profile being selected from a plurality of different QoS profiles associated with the session.

[0060] An embodiment of the present invention provides a method for communication in a wireless communication system (see, for example, claim 43), the wireless communication system including one or more base stations and one or more user devices (UE), the method comprising: A base station serving a user device (UE) of a wireless communication system; communicating via a session, such as a PDU session, when executing a particular application by the UE, the session being associated with a current Quality of Service (QoS) profile, the current QoS profile being selected from a plurality of different QoS profiles associated with the session; and in case of a particular event, the base station replacing a current QoS profile for the session with a new QoS profile for the session, the new QoS profile being selected from a subset or all of a plurality of different QoS profiles associated with the session and / or one or more QoS profiles not already associated with the session.

[0061] An embodiment of the present invention provides a method for communication in a wireless communication system (see e.g. claim 44), the wireless communication system including a UE served by a source base station, the UE communicating via a session, such as a PDU session, when executing a particular application, the session being associated with a current Quality of Service (QoS) profile, the current QoS profile being selected from a plurality of different QoS profiles associated with the session, the method comprising, in case of handover (HO) from the source base station to a target base station: obtaining a subset or all of a plurality of QoS profiles for the session, or information indicative of a subset or all of a plurality of QoS profiles for the session; selecting a new or authorized QoS profile for the session to be provided by the target base station, the new or authorized QoS profile being the same as or different from a current QoS profile or a source QoS profile provided by the source base station before the HO; Includes.

[0062] Computer Program Products An embodiment of the present invention provides a computer program product comprising instructions which, when executed by a computer, cause the computer to carry out one or more methods according to the present invention.

[0063] Thus, embodiments or aspects of the present invention address the above-mentioned problem of using appropriate QoS profiles in case of changing network conditions by providing an approach that allows a wireless communication system or network or an entity thereof to determine or select, in case of a particular event, a new QoS profile from some or all of a plurality of QoS profiles, which may be the same as or different from the current QoS profile provided before the particular event. In the latter case, the new QoS profile replaces the current QoS profile used for the session, e.g., a more preferred or less preferred profile. According to an embodiment, the new QoS profile may be a QoS profile selected from some or all of a plurality of QoS profiles associated with the session. According to other embodiments, the new QoS profile may be a QoS profile that is not yet associated with the session and is selected from some or all of a plurality of QoS profiles provided by the network or system or UE, e.g., a profile provided for a particular application or service. Thus, other than the conventional approach where a profile is associated with a session from the start of the session and is not changed, according to an embodiment of the present invention, one or more QoS profiles may be added or replaced or removed from one or more QoS profiles associated with the session. In other words, other than in conventional approaches, one or more QoS profiles initially associated with a session, e.g., one or more QoS profiles initially associated with a session when establishing the session, may be updated or dynamically adapted during the activity of the session or while the session is active with one or more new QoS profiles not initially associated with the session.

[0064] In the following, embodiments of the inventive technique are described in more detail with reference to embodiments in which the new QoS profile is a QoS profile selected from some or all of the multiple QoS profiles initially associated with the session, however, the inventive technique is equally applicable to embodiments in which the new QoS profile is a QoS profile not yet associated with the session and not yet selected.

[0065] FIG. 4(a) illustrates an embodiment of the present invention in which a QoS profile currently used for a session is replaced with a new QoS profile. In FIG. 4(a), it is assumed that a session associated with a number or number of QoS profiles is currently operating with a particular QoS profile, also referred to as the current QoS profile, as shown in "1." The current QoS profile may be selected in a manner as described above with reference to FIG. 2. During the session, for example, the RAN records a particular event, e.g., one or more changes in network conditions, and, as shown in "2.", the RAN, in the illustrated embodiment, detects that it is no longer able to support the selected or current QoS profile, or detects that it is able to support one or more other QoS profiles associated with the session, e.g., a more preferred QoS profile and / or a QoS profile with a higher value of some QoS metric than the current QoS profile. For example, the change in network conditions may be due to a decrease or increase in resources available to serve the UE. For example, if the cell serving the UE becomes more congested, i.e., if more UEs enter the cell, more resources are used to serve all UEs in the cell, and as a result, the RAN or base station of the cell is no longer able to serve the UEs running applications with the current or selected QoS profile. According to other embodiments, the RAN or base station may no longer be able to validate the selected or current QoS profile for a session if a particular network capability is no longer available, for example if carrier aggregation (CA) or dual connectivity (DC) is no longer available to serve a UE running an application. Yet another embodiment for changing network conditions may be that the channel conditions between the RAN and the UE change and the current QoS profile deteriorates compared to the time it was selected.

[0066] In response to detecting in "2." that the RAN can no longer support the selected or current QoS profile or can support one or more of the other QoS profiles associated with the session, e.g., a more preferred QoS profile and / or a QoS profile with a higher value of some QoS metric than the current QoS profile, in "3.", the RAN obtains and considers a subset or all of the QoS profiles associated with the session or available in the system / network for the application executed by the UE. For example, the RAN may obtain the QoS profiles from one or more of the UE, another base station in the same or different RAN, and one or more of the core network entities. In "4," the RAN performs QoS profile selection and / or admission control. For example, the RAN may determine that the RAN can support one or more of the other QoS profiles from some or all of the QoS profiles associated with the session. For example, in the above situation, a less preferred QoS profile may be used instead of using the currently selected QoS profile. For example, if the session initially used a first or main QoS profile at "1.", the RAN may detect that it can support one or more of a second or alternative QoS profile.

[0067] At "5.", the UE is reconfigured with the selected QoS profile, e.g., using RRC reconfiguration via the RAN, or the bearer flows are updated by the RAN with the selected QoS profile, such that sessions associated with multiple QoS profiles now operate with the new QoS profile, as shown at "6."

[0068] FIG. 4(b) illustrates an embodiment of the present invention in which a QoS profile currently used for a session is replaced with a new QoS profile obtained from the SMF and / or the core network. FIG. 4(b) corresponds to FIG. 4(a) except for "4". According to the illustrated embodiment, the RAN can communicate the supported QoS profiles to the SMF in "4.", and the SMF selects one profile and instructs the RAN to update the bearer. More specifically, the RAN obtains and considers a subset or all of the QoS profiles associated with the session in "3" or available in the system / network for the application executed by the UE in "4a", the RAN signals one or more supported profiles to the SMF. The SMF determines which of the supported QoS profiles should be used in "4b.", and signals the selected QoS profile to the RAN in "4c."

[0069] The embodiments of FIG. 4(a) and FIG. 4(b) relate to decreasing and increasing channel conditions and the associated QoS downgrade or upgrade of the session. When considering the change in the QoS profile due to the improvement of the network conditions, i.e., in “2.”, a QoS upgrade of the session may be performed. In FIG. 4(a) and FIG. 4(b), the RAN may detect that additional resources have become available to serve the UE. For example, a user may leave the cell serving the UE, e.g., one or more users may leave a full or congested cell, thereby freeing up resources that become available to serve the remaining users in the cell. This allows the RAN or base station to serve the UE with a better or more preferred QoS profile. This may be triggered by the BS or the UE, for example. According to other embodiments, the network capabilities may improve, for example, to provide the UE with carrier aggregation or dual connectivity, thereby enabling the RAN to provide a better or more preferred QoS profile for the session. Yet another embodiment, as shown in Figure 2, may be such that channel conditions may improve or be better as compared to initial channel conditions when compared to initial establishment of the bearer flow, such that in response to the improved or better channel conditions, the RAN may provide a better or more preferred QoS profile. In such an embodiment, at "2." in Figure 4(a), the RAN may detect that it can support a better or more preferred QoS profile than the profile currently being used, and at "3.", the RAN obtains and considers a subset or all of the QoS profiles available in the system / network for the application associated with the session or executed by the UE.

[0070] In the embodiment of FIG. 4(a), the RAN, e.g., a base station, determines a change in network conditions and further detects or determines one or more potential new QoS profiles to be used. According to an embodiment, the RAN or base station serving the UE may obtain some or all of the QoS profiles of the session, e.g., from the UE, or from a core network (see FIG. 4(b)), or from another base station. According to other embodiments, some or all of the QoS profiles of the session may be obtained from the UE via a relay. For example, if the UE is a wearable device, such as a smart watch, coupled to the RAN or base station via a cellular telephone, the QoS profile of the session may be obtained by the serving base station via a relay. In other words, some or all of the QoS profiles of the session may be obtained by the serving base station directly from the served UE or indirectly via a relay.

[0071] According to another embodiment, instead of obtaining some or all of the QoS profiles, only information indicative of some or all of the QoS profiles may be obtained. For example, respective indexes pointing to respective QoS profiles of a session may be obtained. The serving base station may store some or all of the QoS profiles or information indicative of the QoS profiles for a session.

[0072] According to a further embodiment, the serving base station may include a request for a QoS profile in a measurement request to the UE, and the UE may include the requested QoS profile or information indicating the requested QoS profile in a measurement report sent or returned to the serving base station.

[0073] According to the above-described embodiments of the present invention, the serving base station may obtain or store information related to all of the QoS profiles, or all of the QoS profiles of the session, or may include a portion of the QoS profiles, also referred to as a subset of the QoS profiles. According to the embodiments, the subset of the different QoS profiles may include: one or more QoS profiles with a lower priority than the current profile, for example obtained in the case of a downgrade situation, or one or more QoS profiles with a higher priority than the current profile, such as the top n QoS profiles, e.g. obtained in case of an upgrade situation, or one or more QoS profiles including one or more QoS parameters or metrics having values ​​that meet a certain criteria, e.g., latency lower or higher than a delay threshold, or data rate lower or higher than a data rate threshold, or values ​​within a certain range; may include.

[0074] In the embodiments described above with reference to Figures 4(a) and 4(b), the RAN or base station updated the bearer with the selected QoS profile, but according to other embodiments, the UE may request a new QoS profile or information indicative of the QoS profile from the serving base station or RAN, for example if the UE also recognizes a certain event.

[0075] Although in the above-described embodiments the RAN or serving base station determined the new QoS profile from a subset or all of the multiple different QoS profiles associated with the session as described with reference to Figure 4(a), the present invention is not limited to such embodiments. Rather, according to other embodiments, the determination of which of the different QoS profiles associated with the session should be used as the new QoS profile may be performed by any other network entity, for example by the UE or by one or more of the core network entities mentioned above, for example the SMF as shown in "4a", "4b" and "4c" in Figure 4(b).

[0076] Embodiments of the present invention address the above problems encountered in case of changing network conditions when running an application on a UE communicating via a session having multiple or several different QoS profiles associated therewith, by enabling a wireless communication system or network to determine or select a new QoS profile from multiple QoS profiles that may be more preferable compared to the QoS profile currently being used due to the changed network conditions, which provides the following advantages or improvements:

[0077] If the network cannot continue to support the QoS profile of a session, it shall look for a downgrade solution before dropping or disconnecting the session. Dropping a session means that the UE and / or application must request and establish the session from scratch.

[0078] On the other hand, if the network conditions improve, the network has a mechanism to upgrade the session, otherwise the session continues with the QoS profile selected during the session establishment phase.

[0079] In the embodiment described above with reference to Fig. 4(a), the UE receives a request, e.g., a measurement request, from the serving base station including a request for a subset or all of the multiple QoS profiles associated with the session, and includes the requested QoS profile or information indicative of the requested QoS profile in a report, e.g., a measurement report, to the serving base station. The present invention is not limited to embodiments in which the UE provides the QoS profile to the serving base station in response to a respective request, e.g., a measurement request, or a report, e.g., a measurement report. Instead, according to other embodiments, the UE may be configured by the system to report a subset or all of the multiple QoS profiles by transmitting the QoS profile or information indicative of the QoS profile periodically, or in response to a specific triggered event, such as a measurement result exceeding a specific threshold, or a beam failure event, or a specific change in the channel condition between the UE and the serving base station.

[0080] According to the above embodiment, the new QoS profile determined to be used for the session in response to a particular event may be used until a further event is detected during which another new QoS profile from the multiple QoS profiles for the session may be selected. However, the invention is not limited to such an embodiment. Rather, according to other embodiments, the new QoS profile determined or selected in the manner described above may be provided temporarily or for a certain period of time only. In other words, the new QoS profile may have a time-based validity associated with it. For example, the serving base station may inform the UE that the new QoS profile is active at one or more instances in time signaled to the UE for a particular period or period of time. For example, the wireless communication system or network or an entity thereof may predict in response to a current event that a new event is likely to occur after a certain period of time, e.g., that a currently detected change in network conditions is likely to revert to a preceding network condition after a certain period of time, or that the UE is likely to return to the original serving base station at a certain time after a handover. In such a situation, the system may inform the UE about the new QoS profile to be used at a particular instance in time, e.g., immediately or at a time when a particular event is predicted to occur, and use it for a particular period of time, also predicted by the system, as long as the event or situation is predicted to exist, after which the current QoS profile is used again. This approach is advantageous as it allows the UE to efficiently use the new QoS profile, e.g., to perform the necessary download of data, etc. Considering, for example, a situation where a mobile user passes through a 5G hotspot in a city and has limited vouchers for this high-speed service, the QoS profile that allows the UE to utilize the high-speed service may be enabled for the time and duration of passing through the 5G hotspot that allows the UE to download data using the high-speed service.

[0081] The embodiments detailed above with respect to Figures 4(a) and 4(b) relate to a particular event in response to which the UE may select a new QoS profile from among a subset or all of a plurality of QoS profiles available or associated with a session with which the UE communicates when executing an application. According to a further embodiment of the invention, the particular event that triggers the selection of a new QoS profile is not a change in network conditions or network capabilities as described above, but rather the event may be a handover event or a conditional handover event.

[0082] FIG. 5 illustrates a network controlled handover from a serving base station or source base station or gNB to a target base station or gNB, for example as described in reference [2]. The UE is considered to be in RRC_connected mode, i.e. served by the source gNB. The UE and the source gNB exchange measurement and control reports. At "0." the source gNB detects a handover (HO) condition, and in response at "1." the source gNB sends a measurement request to the UE, which returns a measurement report at "2." At "3." the source gNB issues a handover request message to the target gNB to pass a transparent RRC container with the necessary information to prepare for handover at the target gNB. The information forwarded to the target gNB may include, among other information, rules for mapping current QoS flows to DRBs, dedicated radio bearers applied to the UE, and PDU session related information. The information may also include UE reported measurement information including beam related information. The PDU session related information may include slice information, if supported, and QoS flow level QoS profiles.

[0083] In "4," the target gNB performs admission control according to the received information in the HO request, prepares the handover, and sends a handover response to the source gNB in ​​"5." In "6," the source gNB switches to a new cell or a new target gNB in ​​"7," and sends an RRC_reconfiguration message to the UE to signal to the target gNB that the RRC reconfiguration is complete in "8."

[0084] The handover event may also be a conditional handover event (CHO) event, and FIG. 6 illustrates a conditional handover from a serving base station or source base station or gNB to a target base station or gNB, for example as described in references [3] and [4]. During the regular handover described above with reference to FIG. 5, due to link degradation, the measurement report provided by the UE in “2.” or the RRC reconfiguration message also referred to as HO command in “6.” may not reach their destination, i.e., the source gNB and the UE, respectively, and as a result, the handover process may not be properly completed. Conditional handover addresses this issue by pre-configuring the UE for handover to a potential target base station before the link to the source gNB deteriorates and handover occurs. FIG. 6 illustrates a conditional handover procedure as described in the above-mentioned references. Besides FIG. 5, in FIG. 6, in “0.”, the HO decision is made by the source gNB, in “1.”, an early HO request is sent to the potential target gNB, in “2.”, it performs admission control and builds the RRC configuration of the UE, which is forwarded to the source gNB with the HO response in “3.” The source gNB at "4." sends a CHO command to the UE, including the RRC configuration obtained from the target gNB. The UE at "5." performs measurements to determine whether a conditional handover event occurs. In response to the event detection by CHO event monitoring at "6.", the UE decides to perform a handover to the target gNB for which it has already received the respective RRC configuration. At "7.", a random access and synchronization procedure with the new target gNB is performed, and at "8.", a reconfiguration complete message is sent to the target gNB. The UE may be configured with one or more events and one or more potential target gNBs, and when the UE detects that an event has occurred, as shown in "6." of FIG. 6, it switches to the corresponding target gNB, as shown in "7." and "8." of FIG. 6.

[0085] In the above-mentioned handover or conditional handover procedure, conventionally the target base station is provided with handover information from the source gNB, which includes the QoS profile currently used by the source or serving base station, and which is also used by the target base station. A problem with this is that if the target base station is not in a position to provide a QoS profile, the target gNB will not allow the handover, i.e. the handover may fail or another target gNB needs to be determined. Another problem is that the target gNB may be in a position to provide a more preferred QoS profile, but the target gNB uses the QoS profile signaled by the serving base station. An embodiment of the present invention addresses these drawbacks encountered during handover or conditional handover by enabling the target gNB to select a new QoS profile to be used from a subset or all of the multiple QoS profiles associated with the session when the UE is changed from the serving base station to the target base station. This addresses the above-mentioned drawback of a target base station not being able to provide a current QoS profile, since an embodiment of the present invention enables the target gNB to also select a QoS profile less preferred than the current profile from a subset or all of the multiple QoS profiles of the session, thereby enabling the target gNB to allow the handover. Also, the issue that the target base station may be able to provide a more favorable QoS profile is addressed, since such a more favorable QoS profile may be selected as the new QoS profile.

[0086] According to a further embodiment, if the target base station determines that among the full subset of the multiple QoS profiles, there is no QoS profile that is more preferable than the currently used QoS profile and the target gNB is able to provide the currently used QoS profile, the target gNB determines or selects the current QoS profile as the new QoS profile to be used by the target base station.

[0087] FIG. 7 illustrates an embodiment of the present invention implementing the inventive approach during a non-conditional handover procedure. The steps illustrated in FIG. 7 essentially correspond to those described above with reference to FIG. 5, except for steps "1." to "5." According to an embodiment of the present invention, in response to the detection of a HO state at the source gNB in ​​"0.", the source gNB in ​​"1." also includes in the measurement request to the UE a request for a QoS profile associated with the session for which the UE is communicating running the application. Thus, in "1.", the measurement request includes a request for a QoS profile. In "2.", in response to the measurement request, the UE includes in a measurement report some or all of the multiple QoS profiles, i.e. all or a subset of the multiple QoS profiles, or according to other embodiments, only an indication of the QoS profiles, such as a respective index pointing to the QoS profile. The measurement report is transmitted to the source gNB which transmits a HO request in "3.", which includes the requested QoS profile or information indicative thereof. In "4.", the target gNB performs admission control taking into account a subset or all of the multiple QoS profiles received or indicated in the HO request and determines new QoS profiles that the target gNB can provide, also referred to as QoS profiles authorized by the target gNB or authorized QoS profiles, as described above. The QoS profiles authorized by the target gNB are included in the HO response in "5." and the UE is reconfigured accordingly.

[0088] Thus, after the HO is completed, the target base station provides an authorized QoS profile for the session, which may differ from the current or source QoS profile provided by the source base station before the handover, e.g., a QoS profile with a higher or lower priority compared to the source QoS profile may be adopted. However, as mentioned above, according to other embodiments, the target gNB may select the same QoS profile as used by the source base station.

[0089] In the embodiment described with reference to Figure 7, the source base station may obtain from the UE a subset or all of the multiple QoS profiles of the session, or information indicative of the QoS profiles of the session, or may obtain this QoS profile information from a memory of the source base station if these QoS profiles already exist in the source gNB, e.g. were stored by the source gNB during a previous HO procedure or during session establishment. In the case of the handover process shown in Figure 7, the QoS profiles or the obtained information are included in the HO request in "3." and transmitted to the target base station. According to other embodiments, the QoS profiles or information about them may be requested by the source base station from the UE using a request different from the measurement request, and the UE may provide a report different from the measurement report including the requested profile or information indicative of the profile.

[0090] If the source gNB stores the UE's QoS profile or information indicating the QoS profile, the measurement request in "1." and the measurement report in "2." may be as in Figure 5 or Figure 6, i.e., it is not necessary to include a request for a QoS profile in the measurement request and include the requested QoS profile or information therefor in the measurement report.

[0091] According to other embodiments, the source gNB may obtain the QoS profiles or information indicative thereof from a core network of the wireless communication system, for example from one or more of the core network entities described above with reference to FIG. 2 that have established a session with multiple QoS profiles. For example, the QoS profiles may be obtained from an SMF or any other network entity described above. In addition to the above-mentioned core network entities such as an SMF in the 5G core network, the profiles may be provided by an MME in the EPC. Also, other core network entities or road side units (RSUs) may provide the QoS profiles, for example a V2X application server or a media server. Also, the QoS profiles may be provided over the top OTT, for example by an entity connected to the UE via the Internet.

[0092] According to other embodiments, the UE may provide the QoS profile or information about the QoS profile associated with the session directly to the gNB, independent of receiving a request from the source gNB. For example, the UE may be configured to report a subset or all of the multiple QoS profiles, or information indicative of the QoS profile, by periodically transmitting the profile or information, or by transmitting the information of the profile in response to a specific or triggering event, e.g., when the UE performs measurements and determines that a particular measurement exceeds a predefined threshold, or in the case of a beam failure event, or when the UE detects a change in channel conditions on the channel between the UE and the source gNB.

[0093] According to other embodiments of the invention, the target gNB may obtain the subset or multiple QoS profiles associated with the session from the UE or from one or more of the core network entities or from an entity connected to the UE, for example via the Internet. Figure 8 shows an embodiment in which the subset or multiple QoS profiles associated with the session for which the target gNB selects a new QoS profile are obtained by the target gNB either from the core network or from the UE. Compared to Figure 5 or Figure 7, the handover procedure according to this embodiment includes an additional step 4a for obtaining the QoS profiles or information about them from either the SMF or the UE. Then, in a similar manner to Figure 7, in "5." the QoS profiles allowed by the target gNB are included in the HO response.

[0094] According to the above-mentioned embodiments, either the multiple QoS profiles or information about them may be acquired at the target gNB, or a subset of the multiple QoS profiles may be acquired. The subset of QoS profiles may include, for example: one or more QoS profiles with a lower priority than the source profile, for example obtained in the case of a downgrade situation, or one or more QoS profiles with a higher priority than the source profile, such as top n QoS profiles, e.g. obtained in case of an upgrade situation, or one or more QoS profiles including one or more QoS parameters or metrics having values ​​that meet a certain criteria, e.g., latency below or above a delay threshold, or data rate below or above a data rate threshold, or values ​​within a certain range; may include one or more of:

[0095] According to the above embodiment, the UE receives the QoS profile allowed by the target gNB via the source gNB, e.g., using an RRC reconfiguration message at "6". However, according to other embodiments, the UE may obtain the QoS profile allowed by the target gNB only when the UE switches to the gNB, as shown diagrammatically at "7a" in Figure 7.

[0096] According to further embodiments, the inventive approach can also be used when performing a conditional handover. Figure 9 illustrates an embodiment of a conditional handover in which a QoS profile is obtained by the source gNB from the UE and transferred to a potential target gNB. Figure 9 illustrates a similar procedure to Figure 6, where first at "1a" a measurement request is sent by the source gNB to the UE, including a request for a QoS profile associated with the session in which the UE communicates. At "1b," a measurement report is sent to the source gNB, including the requested QoS profile or information indicative of these profiles. At 1c, an HO request is sent to the potential target gNB, including the requested QoS profile or information. At "2," the target gNB performs an admission control, including selecting a QoS profile allowed by the target gNB from the QoS profiles received via the HO request, which is included in the HO response at "3" and transmitted to the UE via a CHO command at "4." Then, in response to the handover event, a switch to the target gNB is performed by the UE, similar to that described above with reference to Figure 6.

[0097] According to other embodiments, the source gNB may store the QoS profile for the UE or may obtain the QoS profile or information indicative thereof from a core network entity or from an external entity connected to the UE, e.g. via the Internet. If the source gNB stores the QoS profile or obtains the QoS profile from another entity, steps 1a and 1b are not required and if the QoS profile is obtained from another entity, a respective request is sent towards and a report is received from the other entity.

[0098] According to a further embodiment, when considering a conditional handover as shown in FIG. 9, instead of providing only a single target gNB, two or more target gNBs may also be included in the conditional handover process. FIG. 9 shows, in such an embodiment, a schematic dashed line of an additional target gNB that also receives at "1c", and at "2" the HO request including the QoS profile from the UE is determined to obtain the QoS profile allowed by the further target gNB and returns this information to the source gNB at "3'." The source gNB includes the additional QoS profile allowed by the further target gNB in ​​the CHO command at "4." In such a situation, if a conditional handover event is determined at the UE, in addition, the UE further determines which of the QoS profiles received from the target gNB and from the further target gNB is more preferred and switches to the target gNB or the further target gNB. In other words, if the QoS profile from the target gNB is more preferred, the switchover is made as shown in "7." and "8.". On the other hand, if the further QoS profile is preferred, the switchover is made to the further target gNB as shown in "7'" and "8'" of FIG. 9.

[0099] FIG. 10 illustrates another embodiment for a conditional handover in which the QoS profile or information about the QoS profile is obtained by the target gNB either directly from the UE or from one or more of the network entities. According to another embodiment, the target gNB may also obtain the QoS profile from an external entity connected to the UE, for example via the Internet. Compared to the process illustrated in FIG. 9, instead of obtaining information about the QoS profile by the source station before sending the HO request in "1c.", according to the embodiment of FIG. 10, in response to receiving the HO request in "1.", the target gNB obtains the QoS profile or information about them from the core network, for example from the SMF shown in "1a.", or from the UE, shown in "1b." The rest of the procedure may be the same as in FIG. 9, and in the embodiment of FIG. 10, the conditional handover procedure may involve multiple target gNBs, and the UE may select the target gNB that provides the most preferred QoS profile in response to the conditional handover event detection.

[0100] General Although the embodiments of the present invention have been described in detail above, each embodiment and each aspect may be implemented individually, or two or more embodiments or aspects may be implemented in combination.

[0101] With regard to the above-described embodiments of the various aspects of the invention, it is noted that they are described in an environment in which communication takes place between a transmitter, such as a gNB or a UE, and a receiver, such as a UE and a gNB. However, the invention is not limited to such communication, but rather the principles described above may be equally applied to device-to-device communication, such as D2D, V2V, V2X communication. In such a scenario, the communication takes place via a sidelink between the respective devices. The transmitter is a first UE and the receiver is a second UE that communicates using sidelink resources.

[0102] According to an embodiment, the wireless communication system may include a network or a segment of a network that uses a terrestrial network, or a non-terrestrial network, or an airborne or space-based vehicle, or a combination thereof, as a receiver.

[0103] According to an embodiment, the user device (UE) may be a mobile terminal, or a fixed terminal, or a cellular IoT-UE, or a vehicle UE, or a vehicle group leader (GL) UE, or an IoT, or a narrowband IoT (NB-IoT) device, or a WiFi non-access point station (Non-AP and / or the base station (BS) may be implemented as a mobile or non-mobile base station and may be one or more of a macro cell base station, or a small cell base station, or a base station central unit, or a base station distributed unit, or a roadside unit, or a UE, or a group leader (GL), or a repeater, or a remote radio head, or an AMF, or an SMF, or a core network entity, or a mobile edge computer entity, or a network slice such as an NR or 5G core context, or a WiFi AP STA such as an 802.11ax or 802.11be, or any transmit / receive point (TRP) that enables an item or device to communicate using a wireless communication network and where an item or device is provided with a network connection to communicate using a wireless communication network.

[0104] Although some aspects of the described concepts are described in the context of an apparatus, it will be apparent that these aspects also represent descriptions of corresponding methods, where a block or device corresponds to a method step or feature of a method step. Similarly, aspects described in the context of a method step also represent descriptions of a corresponding block or item or feature of a corresponding apparatus.

[0105] Various elements and features of the invention may be implemented in hardware using analog and / or digital circuitry, software, through execution of instructions by one or more general-purpose or special-purpose processors, or as a combination of hardware and software. For example, embodiments of the invention may be implemented in the environment of a computer system or another processing system. FIG. 11 shows an example of a computer system 500. The units or modules, as well as the steps of the methods performed by these units, may be executed on one or more computer systems 500. The computer system 500 includes one or more processors 502, such as a special-purpose or general-purpose digital signal processor. The processors 502 are connected to a communication infrastructure 504, such as a bus or a network. The computer system 500 includes a main memory 506, such as a random access memory (RAM), and a secondary memory 508, such as a hard disk drive and / or a removable storage drive. The secondary memory 508 may allow computer programs or other instructions to be loaded into the computer system 500. The computer system 500 may further include a communication interface 510, which allows software and data to be transferred between the computer system 500 and external devices. The communications may be from electronic, electromagnetic, optical, or other signals capable of being processed by the communications interface. The communications may use wire or cable, fiber optics, phone lines, cellular phone links, RF links, and other communications channels 512.

[0106] The terms "computer program medium" and "computer readable medium" are generally used to refer to tangible storage media, such as a hard disk installed in a removable storage unit or hard disk drive. These computer program products are means for providing software to the computer system 500. Computer programs, also called computer control logic, are stored in the main memory 506 and / or the secondary memory 508. Computer programs may also be received via the communication interface 510. The computer programs, when executed, enable the computer system 500 to implement the present invention. In particular, the computer programs, when executed, enable the processor 502 to implement the processes of the present invention, such as any of the methods described herein. Thus, such computer programs can represent the controller of the computer system 500. When the present disclosure is implemented using software, the software can be stored in a computer program product and loaded into the computer system 500 using an interface, such as a removable storage drive, the communication interface 510.

[0107] The hardware or software implementation may be performed using a digital storage medium, such as a cloud storage, floppy disk, DVD, Blu-ray, CD, ROM, PROM, EPROM, EEPROM or flash memory, on which electronically readable control signals are stored, which cooperates (or can cooperate) with a programmable computer system such that the respective methods are executed. The digital storage medium may therefore be computer readable.

[0108] Some embodiments according to the invention include a data carrier having electronically readable control signals capable of cooperating with a programmable computer system to cause one of the methods described herein to be performed.

[0109] In general, embodiments of the present invention may be implemented as a computer program product having program code which operates to perform one of the methods when the computer program product is run on a computer. The program code may for example be stored on a machine readable carrier.

[0110] Other embodiments comprise the computer program for performing one of the methods described herein, stored on a machine readable carrier. In other words, an embodiment of the inventive method is, therefore, a computer program having a program code for performing one of the methods described herein, when the computer program runs on a computer.

[0111] A further embodiment of the inventive method is therefore a data carrier (or digital storage medium, or computer readable medium) recorded thereon comprising a computer program for performing one of the methods described herein. A further embodiment of the inventive method is therefore a data stream or a signal sequence representing a computer program for performing one of the methods described herein. The data stream or signal sequence can for example be configured to be transferred via a data communication connection, for example via the Internet. A further embodiment comprises a processing means, for example a computer or a programmable logic device, configured or adapted to perform one of the methods described herein. A further embodiment comprises a computer having installed thereon a computer program for performing one of the methods described herein.

[0112] In some embodiments, a programmable logic device (e.g., a field programmable gate array) may be used to perform some or all of the functions of the methods described herein. In some embodiments, a field programmable gate array may cooperate with a microprocessor to perform one of the methods described herein. In general, the methods are preferably performed by any hardware apparatus.

[0113] The above-described embodiments are merely illustrative of the principles of the present invention. It is understood that modifications and variations of the arrangements and details described herein are obvious to those skilled in the art. It is therefore intended to be limited only by the scope of the appended claims, and not by the specific details presented as illustrative and explanatory of the embodiments herein.

[0114] List of acronyms and symbols BS base station CBR Channel Busy Rate D2D Device to Device EN Emergency Notification eNB Evolved Node B (base station) FDM frequency division multiplexing LTE Long Term Evolution PC5 An interface that uses sidelink channels for D2D communication ProSe for each PPPP packet priority PRB Physical Resource Block ProSe Proximity Service RA Resource Allocation SCI Sidelink Control Information SL Side Link sTTI Short Transmission Time Interval TDM time division multiplexing TDMA Time Division Multiple Access TPC Transmit Power Control / Transmit Power Command UE User Entity (User Equipment) URLLC Highly reliable low latency communication V2V vehicle distance V2I Vehicle to Infrastructure V2P Vehicle to Pedestrian V2N Vehicle to Network V2X Vehicle-to-Vehicle and Road-to-Vehicle, i.e. V2V, V2I, V2P, V2N

[0115] References [1] 3GPP TR 23.786,Study on architecture enhancements for the Evolved Packet System(EPS)and the 5G System(5GS)to support advanced V2X services

[0116] [2] Sassan Ahmadi,''5G NR,Architecture,Technology,Implementation,and Operation of 3GPP New Radio,Standards'',Elsevier 2019.

[0117] [3] R2-1903515,User plane aspects of conditional handover in NR,Ericsson

[0118] [4] R2-1903519,Deconfiguration of conditional handover in NR,Ericsson

Claims

1. 1. A user device (UE) for a wireless communication system, comprising: The UE is served by a serving base station, and when the UE executes a particular application, the UE communicates via a session, such as a PDU session, and the session is associated with a current Quality of Service (QoS) profile, the current QoS profile being selected from a plurality of different QoS profiles associated with the session; The UE receiving, before, during or after the HO, from the source base station and / or from the target base station, information indicating the QoS profile allowed by the target base station or the QoS profile allowed by the target base station; or After switching to the target base station, requesting from the target base station the QoS profile allowed by the target base station or information indicating the QoS profile allowed by the target base station. User Device (UE).

2. 10. The user device of claim 1, wherein, in the event of a specific event, the UE provides to the serving base station information indicating the subset or all of the multiple QoS profiles for the session, or the subset or all of the multiple QoS profiles for the session, to enable the serving base station to replace the current QoS profile for the session with a new QoS profile for the session, wherein the new QoS profile is selected from the subset or all of the multiple different QoS profiles associated with the session.

3. The specific event is: a change in one or more network conditions, for example, additional or fewer resources becoming available to serve the UE, or a change due to carrier aggregation (CA) or dual connectivity (DC) becoming or no longer being available to serve the UE, or a change in channel conditions; Handover (HO) from a serving or source base station to a target base station; Conditional Handover (CHO) from a Serving or Source Base Station to a Target Base Station [0033] The user device of claim 2 .

4. 4. The user device of claim 2, wherein when the specific event is a handover (HO) or a conditional handover (CHO) from the serving base station or the source base station to a target base station, the UE provides the source base station and / or the target base station with information indicating the subset or all of the multiple QoS profiles of the session, or the subset or all of the multiple QoS profiles of the session, to enable the target base station to replace the current QoS profile of the session with the new or allowed QoS profile of the session.

5. The UE receiving a request, e.g. a measurement request, from the source base station including a request for the subset or all of the plurality of QoS profiles, and including the requested QoS profile or information indicative of the requested QoS profile in a report, e.g. a source base station measurement report; and / or and in response to a handover trigger, providing to the source base station a report including information indicating the subset or all of the plurality of QoS profiles for the session, or the subset or all of the plurality of QoS profiles for the session. A user device according to any one of claims 1 to 4.

6. The UE periodically transmitting the subset or all of the plurality of QoS profiles, or the information indicative of the QoS profiles; or transmitting the subset or all of the plurality of QoS profiles, or information indicative of the QoS profiles, in response to a triggered event, for example when a measurement value exceeds a certain threshold, or in response to a beam failure event, or in response to a certain change in the channel conditions; 6. A user device according to claim 1, configured to report the subset or all of the plurality of QoS profiles.

7. In case of a conditional handover (CHO), the UE provides two or more target base stations with information indicating a subset or all of a plurality of QoS profiles for a session, or a subset or all of a plurality of QoS profiles for a session, to enable the target base stations to determine a respective new or allowed QoS profile that each target base station can provide; If a conditional handover condition is met, the UE switches to the target base station that offers a more favorable allowed QoS profile. A user device according to any one of claims 1 to 6.

8. 8. The user device of claim 1, wherein the user device receives an indication from the wireless communication system that the new QoS profile should be applied at a particular time, for example in response to a determination that a particular event is likely to occur at a particular time, for example in response to the particular event, for a particular period of time, before the wireless communication system falls back to the current QoS profile.

9. The QoS profile includes one or more QoS parameters or metrics, wherein the one or more QoS parameters or metrics are: Data rate, Peak or average data rate, quotas or specific amounts of data; Burst size, Latency, delay, Jitter, Reliability, Bit Error Rate (BER) or Packet Data Rate (PER) requirements; Packet loss, Goodput, Priorities, 5G QoS Identifier (5QI) [0033] A user device according to any one of claims 1 to 8.

10. The plurality of QoS profiles associated with the session includes a first QoS profile and one or more second QoS profiles; the first QoS profile is a most preferred QoS profile for the session, and the one or more second QoS profiles are less preferred QoS profiles than the first QoS profile for the session. A user device according to any one of claims 1 to 9.

11. A user device as described in claim 10, wherein the one or more second QoS profiles have a lower priority for the session.

12. A base station for a wireless communication system, the wireless communication system including a UE served by a source base station, the UE communicating via a session, such as a PDU session, when executing a particular application, the session being associated with a current Quality of Service (QoS) profile, the current QoS profile being selected from a plurality of different QoS profiles associated with the session; In the case of handover (HO) from the source base station to the target base station, the target base station obtaining the subset or all of the plurality of QoS profiles for the session or information indicative of the subset or all of the plurality of QoS profiles for the session; Selecting a new or authorized QoS profile for the session to be provided by the target base station, the new or authorized QoS profile being the same as or different from the current QoS profile or a source QoS profile provided by the source base station before the HO; The base station may, for example, provide information indicating the QoS profile authorized by the target base station or the QoS profile authorized by the target base station, if the new or authorized QoS profile is different from the current QoS profile or the source QoS profile provided by the source base station before the HO. via the source base station before or during the HO, or After the UE switches to the target base station, A base station provides:

13. 13. The base station according to claim 12, wherein during the HO, the base station obtains the subset or all of the plurality of QoS profiles for the session, or information indicating the subset or all of the plurality of QoS profiles for the session, from the source base station, or from a core network of the wireless communication system, or from a memory of the target base station, or from another entity attached to the UE over-the-top (OTT), for example via the Internet.

14. When the serving base station determines the new QoS profile, the serving base station: obtain the subset or all of the plurality of QoS profiles for the session from the UE or from a core network of the wireless communication system, or from another entity connected to the UE, e.g. via the Internet, directly via Over-the-Top (OTT) or indirectly, e.g. via an intermediate device; and / or obtain information indicative of the subset or all of the plurality of QoS profiles for the session, such as an index pointing to a particular QoS profile, from the UE or from a core network of the wireless communication system, or via Over-the-Top (OTT) from another entity connected to the UE, for example via the Internet, either directly or indirectly, for example via an intermediate device; and / or storing the subset or all of the plurality of QoS profiles for the session; and / or storing information indicating the subset or all of the plurality of QoS profiles for the session, such as an index pointing to a particular QoS profile; The base station according to claim 12 or 13,

15. A base station as described in claim 14, wherein the UE is served by a serving base station, and in the event of a handover (HO) from the serving base station or the source base station to a target base station, the wireless communication system, e.g., the target base station or one or more core network entities of the wireless communication system, determines the new or allowed QoS profile provided by the target base station, and the new or allowed QoS profile is the same as or different from the current QoS profile or source QoS profile provided by the source base station before the HO.

16. A base station as described in claim 15, wherein after the HO is completed, the target base station provides the allowed QoS profile for the session, the allowed QoS profile being different from the current QoS profile or source QoS profile provided by the source base station before the HO, for example a QoS profile having a higher or lower priority than the source QoS profile.

17. During the handover, the source base station: obtaining the subset or all of the plurality of QoS profiles for the session, or information indicative of the subset or all of the plurality of QoS profiles for the session, from the UE, or from a core network of the wireless communication system, or from a memory of the source base station, or over-the-top (OTT) from another entity connected to the UE, for example via the Internet; including the acquired QoS profile or the acquired information in a HO request; sending the HO request to the target base station, the HO request including the acquired QoS profile or the acquired information; 17. A base station according to claim 15 or 16, which is adapted to perform one or more of the following:

18. During the handover, the target base station transmits to the target base station the subset or all of the plurality of QoS profiles for the session, or information indicating the subset or all of the plurality of QoS profiles for the session, said application, and / or the UE, and / or one or more core network entities of said wireless communication system; and / or Over-the-Top (OTT), by another entity connected to the UE, for example via the Internet; and A base station according to any one of claims 15 to 17.

19. During the handover, the target base station may, for example, if the new or authorized QoS profile is different from the current QoS profile or a source QoS profile provided by the source base station before the handover: including the authorized QoS profile or the information indicating the authorized QoS profile in a HO response; sending the HO response to the source base station; 18. The base station according to claim 15, wherein

20. 1. A method for communication in a wireless communication system, the wireless communication system including one or more base stations and one or more user devices (UE), the method comprising: Serving the UE is serviced by a serving base station; communicating via a session, such as a PDU session, when executing a particular application by the UE, the session being associated with a current Quality of Service (QoS) profile, the current QoS profile being selected from a plurality of different QoS profiles associated with the session; before, during or after the HO, the UE receives from the source base station and / or from the target base station information indicating the QoS profile allowed by the target base station or the QoS profile allowed by the target base station, or After switching to the target base station, the UE requests, from the target base station, the QoS profile allowed by the target base station or information indicating the QoS profile allowed by the target base station.

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