Method and apparatus for handling network energy savings and multicast and broadcast transmissions

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure relates to a method performed by a terminal in a wireless communication system and the method comprises receiving, from a base station, a cell discontinuous transmission (DTX) configuration for a serving cell of the terminal, identifying whether a cell DTX operation is activated, in case that the cell DTX operation is activated and the serving cell is not in a cell DTX active period, not monitoring a physical downlink control channel (PDCCH) for a group-radio network temporary identifier (G-RNTI) or a group-configured scheduling-radio network temporary identifier (G-CS-RNTI) for multicast broadcast service (MBS) multicast.

Description

METHOD AND APPARATUS FOR HANDLING NETWORK ENERGY SAVINGS AND MULTICAST AND BROADCAST TRANSMISSIONS

[0001] This application is based on and derives the benefit of Indian Provisional Applications 202341061751 filed on 13thSeptember 2023 and 202341074720 filed on 02ndNovember 2023, the contents of which are incorporated herein by reference. The proposed embodiments relates to telecommunication network system. More particularly present disclosure relates to handle network energy savings and multicast and broadcast transmissions.

[0002] Fifth generation (5G) mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in "Sub 6 gigahertz (GHz)" bands such as 3.5GHz, but also in "Above 6GHz" bands referred to as millimeter wave (mmWave) including 28GHz and 39GHz. In addition, it has been considered to implement sixth generation (6G) mobile communication technologies (referred to as Beyond 5G systems) in terahertz (THz) bands (for example, 95GHz to 3THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies.

[0003] At the beginning of the development of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), there has been ongoing standardization regarding beamforming and massive multi input multi output (MIMO) for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of BandWidth Part (BWP), new channel coding methods such as a Low Density Parity Check (LDPC) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service.

[0004] Currently, there are ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as Vehicle-to-everything (V2X) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, New Radio Unlicensed (NR-U) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, new radio (NR) user equipment (UE) Power Saving, Non-Terrestrial Network (NTN) which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning.

[0005] Moreover, there has been ongoing standardization in air interface architecture / protocol regarding technologies such as Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, Integrated Access and Backhaul (IAB) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and Dual Active Protocol Stack (DAPS) handover, and two-step random access for simplifying random access procedures (2-step random access channel (RACH) for NR). There also has been ongoing standardization in system architecture / service regarding a 5G baseline architecture (for example, service based architecture or service based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE positions.

[0006] As 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with eXtended Reality (XR) for efficiently supporting Augmented Reality (AR), Virtual Reality (VR), Mixed Reality (MR) and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication.

[0007] Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using Orbital Angular Momentum (OAM), and Reconfigurable Intelligent Surface (RIS), but also full-duplex technology for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and Artificial Intelligence (AI) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at levels of complexity exceeding the limit of UE operation capability by utilizing ultra-high-performance communication and computing resources.

[0008] Network Energy Saving (NES) has become one of the most significant aspects recently considering the ever-increasing power consumption by wireless networks that serve billions of User Equipment's (UEs), and the associated high cost involved. The transmission and the reception by Radio Access Network (RAN) nodes typically account for around 22% of the overall power consumption by the communication networks. For enabling energy efficient networks operations, there is a need for efficient approaches that can achieve energy savings for the networks. Some of these approaches may include a special operation mode (for example, termed as NES mode) wherein the network nodes may apply Cell-discontinuous transmission (Cell-DTX) and / or Cell-discontinuous reception (Cell-DRX) to curtail power consumption by the network nodes.

[0009] NR MBS services can refer to multicast services where intended common contents are targeted to a group of UEs which have joined the multicast group in the multicast coverage area and broadcast services where intended contents may be targeted to all the UEs in the broadcast coverage area. This coverage area can be one radio cell or larger.

[0010] In the legacy system (i.e., 3GPP Release 17 MBS), the UE can receive broadcast services regardless of the Radio Resource Control (RRC) state of the UE; i.e., the UE can avail broadcast service in all RRC states viz. RRC_IDLE, RRC_INACTIVE and RRC_CONNECTED. Also, in the 3GPP Release 17 MBS, multicast service is limited to be accessible only in the RRC_CONNECTED state due to reliability constraints.

[0011] However, 3GPP Release 18 MBS is considering extending the accessibility of the multicast services also to the UEs in the RRC_INACTIVE state so that more UEs can access multicast services as well as the limitation of the number of active connections in the RRC_CONNECTED can be overcome. Further, in the legacy system, DRX configuration and mechanism for the multicast services, which was designed for operation in the RRC_CONNECTED state only, needs to be revisited for potential changes to work in the RRC_INACTIVE state.

[0012] One potential issue with the NES approaches relate to how to apply the NES mode / configurations and Cell-DRX and / or Cell-DTX mechanism for the (a) UEs which are configured and / or receiving MBS broadcast services in the at least one of RRC_IDLE, RRC_INACTIVE and RRC_CONNECTED state, (b) UEs which are configured and / or receiving MBS multicast services in the RRC_CONNECTED state and (c) UEs which are configured and / or receiving MBS multicast services in the RRC_INACTIVE state. At present, there is no defined approach or specification.

[0013] One potential issue with the NES relate to how to signal activation / deactivation indication status for SP CSI reporting configuration and / or sub-configurations on uplink control channel. The signaling approach is required to be efficient and effective from the signaling perspective and also be consistent in conjunction to the signaling approaches used in the legacy.

[0014] In Rel-15, Semi-Persistent CSI reporting on Physical Uplink Control Channel (PUCCH) Activation / Deactivation Medium Access Control (MAC) Control Element (CE) is introduced to activate-deactivate SP CSI configuration to be transmitted on PUCCH. The detailed approach is described in the prior art TS 38.321 as below:

[0015] [table 1]

[0016]

[0017] In Rel-18 NES, Third Generation Partnership Project (3GPP) Radio Access Network Working Group 1 (known as RAN1 WG) is working on spatial domain (SD) adaptation scheme by e.g. some spatial components (antenna ports) are not used.

[0018] In Rel-15, the UE reports CSI on PUCCH, which assumed that all spatial components are active. Only for activated CSI configuration linked to Si bit, UE reports CSI on PUCCH.

[0019] In Rel-18, the UE reports CSI on PUCCH, which assumes that some spatial components are active. Which spatial components are assumed is called as “sub-configuration”.

[0020] 3GPP RAN1 WG agreed that for each CSI configuration, at most L (maybe up to 8 or 4) sub-configurations are configured. N out of L sub-configurations are activated. Then, the UE sends CSI reporting on PUCCH for each sub-configuration and configuration, assuming such activated N sub-configuration.

[0021] Thus, it is desired to address the above-mentioned disadvantages or other shortcomings or at least provide a useful alternative.

[0022] The principal object of the embodiments herein is to handle Network Energy Savings (NES) for multicast and broadcast transmissions.

[0023] Another object of the invention is to specify how to apply the NES mode / configurations and Cell-DRX and / or Cell-DTX mechanism for the (a) UEs which are configured and / or receiving MBS broadcast services in the at least one of RRC_IDLE, RRC_INACTIVE and RRC_CONNECTED state, (b) UEs which are configured and / or receiving MBS multicast services in the RRC_CONNECTED state and (c) UEs which are configured and / or receiving MBS multicast services in the RRC_INACTIVE state.

[0024] Another object of the invention is to allow MBS Semi-Persistent Scheduling (SPS) transmission in Cell DRX Active Time.

[0025] Another object of the invention is to allow Sounding Reference Signal (SRS) transmission in the Cell DRX Active Time.

[0026] Another object of the invention is to provide a method for the UE to operate in NES and MBS together.

[0027] Another object of the invention is to handle signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell in a wireless communication network.

[0028] Another object of the invention is to Selectively utilize two different SP CSI report configuration activation and deactivation signalling.

[0029] Another object of the invention is to utilize by network either an enhanced MAC CE signalling or a legacy MAC signalling and interpreting UE the received signalling, even when enhanced SP CSI report configuration is configured.

[0030] Another object of the invention is to achieve resource efficiency by making use of optimized MAC CE signalling.

[0031] Another object of the invention is to provide a SP CSI reporting regulation based on Active Time of activated Cell-DRX configuration.

[0032] Another object of the invention is to enable UE capability for supporting enhanced SP CSI reporting on PUCCH and PUSCH.

[0033] In one aspect, the objectives are achieved by providing a method for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The method includes determining, by the UE, whether the at least one cell-DTX configuration is in Active Period or Non-Active Period, when the at least one cell-DTX configuration is activated. Further, the method includes monitoring, by the UE, at least one Point to Multipoint (PTM) Multicast Traffic channel (MTCH) for least one Group-Radio Network Temporary Identifier (G-RNTI) and Group-Configured Scheduling-Radio Network Temporary Identifier (G-CS-RNTI) and Point to Point (PTP) MTCH channel for at least one Cell-Radio Network Temporary Identifier (C-RNTI) and Configured Scheduling-Radio Network Temporary Identifier (CS-RNTI) during Active Period of the at least one cell-DTX configuration to receive MBS multicast service. Further, the method includes skip monitoring, by the UE, at least PTM MTCH channel for at least one G-RNTI and G-CS-RNTI and PTP multicast MTCH channel for at least one C-RNTI and CS-RNTI to receive MBS multicast service, when each of the at least one cell-DTX configuration is in non-Active Period.

[0034] In an embodiment, a method performed by a terminal in a wireless communication system is provided. The method comprises receiving, from a base station, a cell discontinuous transmission (DTX) configuration for a serving cell of the terminal, identifying whether a cell DTX operation is activated, in case that the cell DTX operation is activated and the serving cell is not in a cell DTX active period, not monitoring a physical downlink control channel (PDCCH) for a group-radio network temporary identifier (G-RNTI) or a group-configured scheduling-radio network temporary identifier (G-CS-RNTI) for multicast broadcast service (MBS) multicast.

[0035] In an embodiment, a method performed by a base station in a wireless communication system is provided. The method comprises transmitting, to a terminal, a cell discontinuous transmission (DTX) configuration for a serving cell of the terminal and transmitting, to the terminal, information activating a cell DTX operation, wherein, in case that the cell DTX operation is activated and the serving cell is not in a cell DTX active period, a physical downlink control channel (PDCCH) for a group-radio network temporary identifier (G-RNTI) or a group-configured scheduling-radio network temporary identifier (G-CS-RNTI) is not monitored for multicast broadcast service (MBS) multicast.

[0036] In an embodiment, a terminal in a wireless communication system is provided. The terminal comprises a transceiver and a controller operably coupled to the transceiver, configured to receive, from a base station, a cell discontinuous transmission (DTX) configuration for a serving cell of the terminal, to identify whether a cell DTX operation is activated, in case that the cell DTX operation is activated and the serving cell is not in a cell DTX active period, not to monitor a physical downlink control channel (PDCCH) for a group-radio network temporary identifier (G-RNTI) or a group-configured scheduling-radio network temporary identifier (G-CS-RNTI) for multicast broadcast service (MBS) multicast.

[0037] In an embodiment, a base station in a wireless communication system is provided. The base station comprises a transceiver and a controller operably coupled to the transceiver, configured to transmit, to a terminal, a cell discontinuous transmission (DTX) configuration for a serving cell of the terminal, and to transmit, to the terminal, information activating a cell DTX operation, wherein, in case that the cell DTX operation is activated and the serving cell is not in a cell DTX active period, a physical downlink control channel (PDCCH) for a group-radio network temporary identifier (G-RNTI) or a group-configured scheduling-radio network temporary identifier (G-CS-RNTI) is not monitored for multicast broadcast service (MBS) multicast.

[0038] In an embodiment, the method to determine whether the at least one cell-DTX configuration is in Active Period or non-Active Period includes receiving while the UE is in NES cell, Multicast Broadcast Service (MBS) multicast service from a network apparatus when the UE is in at least one of a Radio Resource Configuration (RRC) CONNECTED state or RRC INACTIVE state. Further, the method includes receiving a first signalling message that includes at least one cell-Discontinuous Reception (DRX) configuration and cell-Discontinuous Transmission (DTX) configuration from the network apparatus. Further, the method includes receiving, by the UE, a second signalling message that includes at one cell-Discontinuous Reception (DRX) configuration activation or deactivation indication and cell-Discontinuous Transmission (DTX) activation or deactivation indication from the network apparatus. Further, the method includes determining whether the at least one cell-DRX configuration and cell-DTX configuration is activated. Further, the method includes determining, by the UE, whether the at least one cell-DRX configuration and the cell-DTX configuration is in Active Period or non-Active Period, when the at least one cell-DRX configuration and cell-DTX configuration is activated.

[0039] In an embodiment, the method of includes receiving, by the UE, while the UE is in NES cell, at least one MBS multicast message from the network apparatus when the UE is in at least one of the RRC CONNECTED state. Further, the method includes receiving, by the UE, the first signalling message that includes the at least one cell-DTX configuration from the network apparatus. Further, the method includes receiving, by the UE, a second signalling message that includes at least one cell-DTX activation or deactivation indication from the network apparatus. Further, the method includes determining, by the UE, whether the at least one cell-DTX configuration is activated. Further, the method includes determining, by the UE, whether the at least one cell-DTX configuration is in at least one Active Period or non-Active Period, when the at least one cell-DTX configuration is activated. Further, the method includes monitoring multicast Semi-persistent Scheduling (SPS) occasions, when the at least one cell-DTX configuration is in the Active Period. Further, the method includes skip monitoring SPS occasions, when each of the at least one cell DTX configuration is in non-Active Period.

[0040] In an embodiment, the method includes receiving, by the UE, while the UE is in NES cell, Multicast Broadcast Service (MBS) broadcast service from the network apparatus irrespective of the at least one cell-DTX configuration is in Active Period or non-Active Period when on-Duration-timer PTM or Inactivity timer PTM for G-RNTI for MBS broadcast is running, wherein the UE is in at least one of a RRC_CONNECTED state, RRC_INACTIVE state and RRC_IDLE state.

[0041] In an embodiment, the method includes determining, by the UE, whether the at least one cell-DRX configuration is in at least one Active Period or non-Active Period, when the at least one cell-DRX configuration is activated. Further, the method includes transmitting, by the UE, Sounding Reference Signal (SRS) to the network apparatus during Active Period of the at least one cell-DRX configuration. Further, the method includes skip transmitting, by the UE, SRS to the network apparatus when each of the at least one cell-DRX configuration is in non-Active Period.

[0042] In an embodiment, the SRS is at least one of periodic SRS and semi-persistent SRS.

[0043] In an embodiment, the method includes receiving, by the UE, the first signalling message that includes at least one cell-Discontinuous Reception (DRX) configuration and cell-Discontinuous Transmission (DTX) configuration from the network apparatus. Further, the method includes receiving, by the UE, a second signalling message that includes at least one cell-Discontinuous Reception (DRX) configuration and cell-Discontinuous Transmission (DTX) activation or deactivation indication from the network apparatus. Further, the method includes determining, by the UE, whether the at least one cell-DTX configuration is activated. Further, the method includes determining, by the UE, whether the at least one cell-DTX configuration is in Active Period or non-Active Period, when the at least one cell-DTX configuration is activated. Further, the method includes determining, by the UE, whether on Duration-timer PTM or Inactivity timer PTM or retransmission timer DL PTM for G-RNTI or G-CS-RNTI for MBS multicast is running. Further, the method includes monitoring PDCCH by using G-RNTI or G-CS-RNTI for the MBS multicast service only during Active Period of cell-DTX configuration, when on-Duration-timer PTM or Inactivity timer PTM or retransmission timer DL PTM for G-RNTI or G-CS-RNTI for MBS multicast is running. Also, the method includes skip monitoring PDCCH by using G-RNTI or G-CS-RNTI for MBS multicast service during non, when each of the at least one cell-DTX configuration is in non-active period, on-Duration-timer PTM or Inactivity timer PTM or retransmission timer DL PTM for G-RNTI or G-CS-RNTI for MBS multicast is running. Also, the method includes skip monitoring PDCCH by using G-RNTI or G-CS-RNTI for MBS multicast service during Active Period of the at least one cell-DTX configuration, when on-Duration-timer PTM or Inactivity timer PTM or retransmission timer DL PTM for G-RNTI or G-CS-RNTI for MBS multicast is not running. Further, the method includes skip monitoring PDCCH by using G-RNTI or G-CS-RNTI for MBS multicast service, when each of the cell-DTX configuration is in non-Active Period, and when on-Duration-timer PTM or Inactivity timer PTM or retransmission timer DL PTM for G-RNTI or G-CS-RNTI for MBS multicast is not running.

[0044] In an embodiment, the first signalling message is at least one of RRC Reconfiguration message, System Information Broadcast message or multicast MBS Control Channel (MCCH) message.

[0045] In an embodiment, the second signalling message is at least one of a RRC Reconfiguration message, Downlink Control Indication (DCI) signalling message, System Information Broadcast message or multicast MCCH message or MAC Control Element (CE).

[0046] Accordingly, the embodiment herein is to provide a method for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The method includes transmitting, by a network apparatus, a Multicast Broadcast Service (MBS) multicast service to a UE, when the UE is in at least one of a Radio Resource Configuration (RRC) CONNECTED state or RRC INACTIVE state. Further, the method includes transmitting, by the network apparatus, a first signalling message to the UE. The first signalling message comprises at least one cell-Discontinuous Reception (DRX) configuration and cell-Discontinuous Transmission (DTX) configuration.

[0047] In an embodiment, the method includes transmitting, by the network apparatus, the MBS broadcast transmission to the UE irrespective of the Active Period or the non-Active Period when on-Duration-timer PTM or Inactivity timer PTM for G-RNTI for MBS broadcast is running, when the UE is in at least one of a RRC CONNECTED state, RRC INACTIVE state and RRC IDLE state.

[0048] In an embodiment, the method includes receiving, by the network apparatus, Sounding Reference Signal (SRS) from the UE during Active Period of the at least one cell-DRX configuration, when the cell-DRX configuration is activated. Further, the method includes skip receiving, by the network apparatus, the SRS from the UE when each of the at least one cell-DRX configuration is in non-Active Period.

[0049] Accordingly, the embodiment herein is to provide a method for signalling Semi-Persistent (SP) CSI report configuration activation and deactivation for NES cell. The method includes receiving, by a UE, while in a NES cell, a third signalling message from a network apparatus that includes a SP CSI report configuration and an enhanced SP CSI report configuration to send the SP CSI report to the network apparatus. The enhanced SP CSI report configuration comprises one or more sub-configurations. Further, the method includes receiving, by a UE, while in a NES cell, from a network apparatus at least one of a SP CSI reporting activation or deactivation MAC CE and an enhanced SP CSI reporting activation or deactivation indication MAC CE to perform the SP CSI reporting to the network apparatus. Further, the method includes determining, by the UE, whether an activation / deactivation status of the SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1 or 0, when the legacy SP CSI reporting activation or deactivation MAC CE is received by the UE. Further, the method includes interpreting, by the UE, that at least one activated sub-configuration of enhanced SP CSI report configuration remains activated and at least one deactivated sub-configuration of enhanced SP CSI report configuration remains deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1. Further, the method includes interpreting, by the UE, that all sub-configurations of the enhanced SP CSI reporting configuration are deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 0.

[0050] In an embodiment, the method includes determining, by the UE, whether the activation / deactivation status of pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1 or 0. Further, the method includes interpreting, by the UE, that the one or more sub-configuration of the enhanced SP CSI report configuration are deactivated, when the activation / deactivation of the pertinent SP CSI report configuration status field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1. Further, the method includes interpreting, by the UE, that all the sub-configuration of the enhanced SP CSI report configuration are deactivated and storing activation / deactivation status of the one or more sub-configurations of the enhanced SP CSI report configuration, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 0.

[0051] In an embodiment, the method includes transmitting, by the UE, a UE capability information message to the network apparatus to indicate whether the UE supports enhanced SP CSI reporting on PUCCH and / or PUSCH. Further, the method includes receiving, by the UE, the enhanced SP CSI reporting activation or deactivation MAC CE, when the UE is capable to support the enhanced SP CSI reporting on PUCCH and / or PUSCH.

[0052] In an embodiment, the method includes determining, by the UE, whether the at least one activated cell-DRX configuration is in Active Period or non-Active Period. Further, the method includes transmitting, by the UE, the at least one of legacy SP CSI report and enhanced SP CSI report to the network apparatus during Active Period of the at least one cell-DRX configuration. Further, the method includes skip transmitting, by the UE, the at least one of legacy SP CSI report and enhanced SP CSI report to the network apparatus during non-Active Period of each of the at least one cell-DRX configuration.

[0053] In an embodiment, the enhanced SP CSI reporting activation or deactivation MAC CE is at least one of a fixed size or variable size.

[0054] In an embodiment, the activation / deactivation status of the enhanced SP CSI reporting activation or deactivation MAC CE is represented with 1-octet fixed size format for SP CSI configuration field and / or with up to 4-octet variable size format for SP CSI sub-configurations field.

[0055] In an embodiment, the third signaling message is a RRC signaling message.

[0056] In an embodiment, the method includes receiving, by the UE, reconfiguration message and reconfiguration with sync message from network apparatus to reconfigure the SP CSI report configuration and the enhanced SP CSI report configuration. Further, the method includes deactivating, by the UE, the SP CSI report configuration(s), and the enhanced SP CSI report configuration(s) and all its sub-configurations, upon the reconfiguration from upper layers and after the reconfiguration with sync.

[0057] Accordingly, the embodiment herein is to provide a method for signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell. The method includes determining, by a network apparatus, whether the UE is capable to support the enhanced SP CSI report configuration. Further, the method includes selecting, by the network apparatus, at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE for transmission to the UE based on resource efficiency. The enhanced SP CSI reporting configuration comprises one or more sub-configurations. Further, the method includes transmitting, by the network apparatus, at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE on PUCCH based on the selection.

[0058] In an embodiment, the method to select at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE for transmission includes determining, by the network apparatus, whether the one or more sub-configurations is at least one of activated or deactivated. Further, the method includes selecting, by the network apparatus, the legacy SP CSI reporting activation or deactivation MAC CE, when all the sub-configurations are deactivated. Further, the method includes selecting, by the network apparatus, the enhanced SP CSI reporting activation or deactivation MAC CE, when the one or more sub-configurations is activated.

[0059] Accordingly, the embodiment herein is to provide a User Equipment for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The UE comprises a processor and a MBS controller coupled to the processor. The MBS controller determines whether the at least one cell-DTX configuration is in Active period or Non-Active Period, when the at least one cell-DTX configuration is activated. Further, the MBS controller monitors at least one Point to Multipoint (PTM) Multicast Traffic channel (MTCH) for least one Group-Radio Network Temporary Identifier (G-RNTI) and Group-Configured Scheduling-Radio Network Temporary Identifier (G-CS-RNTI) and Point to Point (PTP) MTCH channel for at least one Cell-Radio Network Temporary Identifier (C-RNTI) and Configured Scheduling-Radio Network Temporary Identifier (CS-RNTI) during Active Period of the at least one cell-DTX configuration to receive MBS multicast service. Also, the MBS controller skip monitor at least PTM MTCH channel for at least one G-RNTI and G-CS-RNTI and PTP multicast MTCH channel for at least one C-RNTI and CS-RNTI to receive MBS multicast service, when each of the at least one cell-DTX configuration is in non-Active Period.

[0060] Accordingly, the embodiment herein is to provide a network apparatus for handling for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The network apparatus comprises a processor and a MBS controller coupled to the processor. The MBS controller transmits a Multicast Broadcast Service (MBS) multicast service to a UE, when the UE is in at least one of a Radio Resource Configuration (RRC) CONNECTED state or RRC INACTIVE state. Further, the MBS controller transmits a first signalling message to the UE. The first signalling message comprises at least one cell-Discontinuous Reception (DRX) configuration and cell-Discontinuous Transmission (DTX) configuration.

[0061] Accordingly, the embodiment herein is to provide a UE for signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell. The UE comprises a processor and SP CSI report handler communicatively coupled to the processor. The SP CSI report handler receive while in a NES cell, a third signalling message from a network apparatus that includes a SP CSI report configuration and an enhanced SP CSI report configuration to send the SP CSI report to the network apparatus, The enhanced SP CSI report configuration comprises one or more sub-configurations. Further, the SP CSI report handler receives while in a NES cell, from a network apparatus at least one of a SP CSI reporting activation or deactivation MAC CE and an enhanced SP CSI reporting activation or deactivation indication MAC CE to perform the SP CSI reporting to the network apparatus. Further, the SP CSI report handler determines whether an activation / deactivation status of the SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1 or 0, when the legacy SP CSI reporting activation or deactivation MAC CE is received by the UE. Further, the SP CSI report handler interprets that at least one activated sub-configuration of enhanced SP CSI report configuration remains activated and at least one deactivated sub-configuration of enhanced SP CSI report configuration remains deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1. Further, the SP CSI report handler interprets that all sub-configurations of the enhanced SP CSI reporting configuration are deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 0.

[0062] Accordingly, the embodiment herein is to provide a network apparatus for signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell. The network apparatus includes a processor and a SP CSI handler coupled to the processor. The SP CSI handler determines whether the UE is capable to support the enhanced SP CSI report configuration. Further, the SP CSI handler selects at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE for transmission to the UE based on resource efficiency, wherein the enhanced SP CSI reporting configuration comprises one or more sub-configurations. Further, the SP CSI handler transmits at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE on PUCCH based on the selection.

[0063] These and other aspects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating preferred embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications be made within the scope of the embodiments herein.

[0064] According to various embodiments of the disclosure, a method and apparatus for handling network energy savings and multicast and broadcast transmissions are provided.

[0065] These and other features, aspects, and advantages of the present embodiments are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:

[0066] Fig. 1 is a block diagram that illustrates a UE for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells, according to the embodiment as disclosed herein;

[0067] Fig. 2 is a block diagram that illustrates a network apparatus for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells, according to the embodiment as disclosed herein;

[0068] Fig. 3 is a flow diagram that illustrates a method for handling by UE multicast and broadcast transmissions in Network Energy Saving (NES) cells, according to the embodiment as disclosed herein;

[0069] Fig. 4 is a flow diagram that illustrates a method for handling by network apparatus multicast and broadcast transmissions in Network Energy Saving (NES) cells, according to the embodiment as disclosed herein;

[0070] Fig. 5 is a flow diagram that illustrates a method for operational flow of DRX operation for the UE configured and / or receiving multicast in RRC_INACTIVE state in the cell configured with Cell-DTX, according to the embodiment as disclosed herein;

[0071] Fig. 6 is a block diagram that illustrates a UE for signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell, according to the embodiment as disclosed herein;

[0072] Fig. 7 is a block diagram that illustrates network apparatus for signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell, according to the embodiment as disclosed herein;

[0073] Fig. 8 is a flow diagram that illustrates a method for signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell by network UE, according to the embodiment as disclosed herein;

[0074] Fig. 9 is a flow diagram that illustrates a method for signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell, according to the embodiment as disclosed herein;

[0075] Fig. 10 is a flow diagram that illustrates a method for signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell by network apparatus, according to the embodiment as disclosed herein;

[0076] Fig. 11 describes a potential format for Enhanced SP CSI reporting on PUCCH Activation / Deactivation MAC CE.

[0077] It may be noted that to the extent possible, like reference numerals have been used to represent like elements in the drawing. Further, those of ordinary skill in the art will appreciate that elements in the drawing are illustrated for simplicity and may not have been necessarily drawn to scale. For example, the dimension of some of the elements in the drawing may be exaggerated relative to other elements to help to improve the understanding of aspects of the invention. Furthermore, the elements may have been represented in the drawing by conventional symbols, and the drawings may show only those specific details that are pertinent to the understanding the embodiments of the invention so as not to obscure the drawing with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

[0078] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. Also, the various embodiments described herein are not necessarily mutually exclusive, as some embodiments can be combined with one or more other embodiments to form new embodiments. The term “or” as used herein, refers to a non-exclusive or, unless otherwise indicated. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein can be practiced and to further enable those skilled in the art to practice the embodiments herein. Accordingly, the examples are not be construed as limiting the scope of the embodiments herein.

[0079] As is traditional in the field, embodiments are described and illustrated in terms of blocks that carry out a described function or functions.　These blocks, which referred to herein as managers, units, modules, hardware components or the like, are physically implemented by analog and / or digital circuits such as logic gates, integrated circuits, microprocessors, microcontrollers, memory circuits, passive electronic components, active electronic components, optical components, hardwired circuits and the like, and optionally be driven by firmware and software. The circuits, for example, be embodied in one or more semiconductor chips, or on substrate supports such as printed circuit boards and the like.　The circuits constituting a block be implemented by dedicated hardware, or by a processor (e.g., one or more programmed microprocessors and associated circuitry), or by a combination of dedicated hardware to perform some functions of the block and a processor to perform other functions of the block. Each block of the embodiments be physically separated into two or more interacting and discrete blocks without departing from the scope of the proposed method.　Likewise, the blocks of the embodiments be physically combined into more complex blocks without departing from the scope of the proposed method.

[0080] The accompanying drawings are used to help easily understand various technical features and it is understood that the embodiments presented herein are not limited by the accompanying drawings. As such, the proposed method is construed to extend to any alterations, equivalents and substitutes in addition to those which are particularly set out in the accompanying drawings. Although the terms first, second, etc. used herein to describe various elements, these elements are not be limited by these terms. These terms are generally used to distinguish one element from another.

[0081] Accordingly, the embodiments disclose a method for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The method includes determining, by the UE, whether the at least one cell-DTX configuration is in Active period or Non-Active Period, when the at least one cell-DTX configuration is activated. Further, the method includes monitoring, by the UE, at least one Point to Multipoint (PTM) Multicast Traffic channel (MTCH) for least one Group-Radio Network Temporary Identifier (G-RNTI) and Group-Configured Scheduling-Radio Network Temporary Identifier (G-CS-RNTI) and Point to Point (PTP) MTCH channel for at least one Cell-Radio Network Temporary Identifier (C-RNTI) and Configured Scheduling-Radio Network Temporary Identifier (CS-RNTI) during Active Period of the at least one cell-DTX configuration to receive MBS multicast service. Further, the method includes skip monitoring, by the UE, at least PTM MTCH channel for at least one G-RNTI and G-CS-RNTI and PTP multicast MTCH channel for at least one C-RNTI and CS-RNTI to receive MBS multicast service, when each of the at least one cell-DTX configuration is in non-Active Period.

[0082] Accordingly, the embodiments disclose a method for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The method includes transmitting, by a network apparatus, a Multicast Broadcast Service (MBS) multicast service to a UE, when the UE is in at least one of a Radio Resource Configuration (RRC) CONNECTED state or RRC INACTIVE state. Further, the method includes transmitting, by the network apparatus, a first signalling message to the UE indicating at least one Active Period and non-Active Period of the at least one cell DRX configuration and cell DT configuration. The first signalling message comprises at least one cell-Discontinuous Reception (DRX) configuration and cell-Discontinuous Transmission (DTX) configuration.

[0083] Accordingly, the embodiments disclose a method for signalling Semi-Persistent (SP) CSI report configuration activation and deactivation for NES cell. The method includes receiving, by a UE, while in a NES cell, a third signalling message from a network apparatus that includes a SP CSI report configuration and an enhanced SP CSI report configuration to send the SP CSI report to the network apparatus. The enhanced SP CSI report configuration comprises one or more sub-configurations. Further, the method includes receiving, by a UE, while in a NES cell, from a network apparatus at least one of a SP CSI reporting activation or deactivation MAC CE and an enhanced SP CSI reporting activation or deactivation indication MAC CE to perform the SP CSI reporting to the network apparatus. Further, the method includes determining, by the UE, whether an activation / deactivation status of the SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1 or 0, when the legacy SP CSI reporting activation or deactivation MAC CE is received by the UE. Further, the method includes interpreting, by the UE, that at least one activated sub-configuration of enhanced SP CSI report configuration remains activated and at least one deactivated sub-configuration of enhanced SP CSI report configuration remains deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1. Further, the method includes interpreting, by the UE, that all sub-configurations of the enhanced SP CSI reporting configuration are deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 0.

[0084] Accordingly, the embodiments disclose a method for signalling Semi-Persistent (SP) CSI report configuration activation and deactivation for NES cell. The method includes determining, by a network apparatus, whether the UE is capable to support the enhanced SP CSI report configuration. Further, the method includes selecting, by the network apparatus, at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE for transmission to the UE based on resource efficiency. The enhanced SP CSI reporting configuration comprises one or more sub-configurations. Further, the method includes transmitting, by the network apparatus, at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE on PUCCH based on the selection.

[0085] Accordingly, the embodiments disclose a UE for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The UE comprises a processor and a MBS controller coupled to the processor. The MBS controller determines whether the at least one cell-DTX configuration is in Active Period or Non-Active Period, when the at least one cell-DTX configuration is activated. Further, the MBS controller monitors at least one Point to Multipoint (PTM) Multicast Traffic channel (MTCH) for least one Group-Radio Network Temporary Identifier (G-RNTI) and Group-Configured Scheduling-Radio Network Temporary Identifier (G-CS-RNTI) and Point to Point (PTP) MTCH channel for at least one Cell-Radio Network Temporary Identifier (C-RNTI) and Configured Scheduling-Radio Network Temporary Identifier (CS-RNTI) during Active Period of the at least one cell-DTX configuration to receive MBS multicast service. Also, the MBS controller skip monitor at least PTM MTCH channel for at least one G-RNTI and G-CS-RNTI and PTP multicast MTCH channel for at least one C-RNTI and CS-RNTI to receive MBS multicast service, when each of the at least one cell-DTX configuration is in non-Active Period.

[0086] Accordingly, the embodiments disclose a network apparatus for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The network apparatus comprises a processor and a MBS controller coupled to the processor. The MBS controller transmits a Multicast Broadcast Service (MBS) multicast service to a UE, when the UE is in at least one of a Radio Resource Configuration (RRC) CONNECTED state or RRC INACTIVE state. Further, the MBS controller transmits a first signalling message to the UE indicating at least one Active Period and non-Active Period of the at least one cell DRX configuration and cell DT configuration, wherein the first signalling message comprises at least one cell-Discontinuous Reception (DRX) configuration and cell-Discontinuous Transmission (DTX) configuration.

[0087] Accordingly, the embodiments disclose a UE for signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell. The UE comprises a processor and SP CSI report handler communicatively coupled to the processor. The SP CSI report handler receive while in a NES cell, a third signalling message from a network apparatus that includes a SP CSI report configuration and an enhanced SP CSI report configuration to send the SP CSI report to the network apparatus, The enhanced SP CSI report configuration comprises one or more sub-configurations. Further, the SP CSI report handler receives while in a NES cell, from a network apparatus at least one of a SP CSI reporting activation or deactivation MAC CE and an enhanced SP CSI reporting activation or deactivation indication MAC CE to perform the SP CSI reporting to the network apparatus. Further, the SP CSI report handler determines whether an activation / deactivation status of the SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1 or 0, when the legacy SP CSI reporting activation or deactivation MAC CE is received by the UE. Further, the SP CSI report handler interprets that at least one activated sub-configuration of enhanced SP CSI report configuration remains activated and at least one deactivated sub-configuration of enhanced SP CSI repor configuration remains deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1. Further, the SP CSI report handler interprets that all sub-configurations of the enhanced SP CSI reporting configuration are deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 0.

[0088] Accordingly, the embodiments disclose a network apparatus for signalling Semi Persistent (SP) CSI report configuration activation and deactivation for NES cell. The network apparatus includes a processor and a SP CSI handler coupled to the processor. The SP CSI handler determines whether the UE is capable to support the enhanced SP CSI report configuration. Further, the SP CSI handler select at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE for transmission to the UE based on resource efficiency, wherein the enhanced SP CSI reporting configuration comprises one or more sub-configurations. Further, the SP CSI handler transmits at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE on PUCCH based on the selection.

[0089] The proposed solution provides a method for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The proposed solution allows MBS SP transmission in cell DRX active time. Also, the proposed solution allows SRS transmission in cell DRX active time. The proposed solution provides an efficient method for operating NES and MBS together, particularly allowing MBS SPS transmission in Cell DRX Active Time and SRS transmission in the Cell DRX Active Time. Further, the proposed solution highly reduces the Network energy consumption cost and resource utilization.

[0090] Fig. 1 is a block diagram that illustrates a UE for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells, according to the embodiment as disclosed herein.

[0091] The User Equipment (101) includes a processor (103), a memory (105), an I / O interface (107), MBS controller (109). Furthermore, the processor (103) of the UE (101) communicates with the memory (105), the I / O interface (107), and the MBS controller (109). The processor (103) is configured to execute instructions stored in the memory (105) and to perform various processes. The processor (103) can include one or a plurality of processors, can be a general-purpose processor such as a central processing unit (CPU), an application processor (AP), or the like, a graphics-only processing unit such as a graphics processing unit (GPU), a visual processing unit (VPU), and / or an Artificial Intelligence (AI) dedicated processor such as a neural processing unit (NPU).

[0092] Furthermore, the memory (105) of the UE (101) includes storage locations that can be addressed through the processor (103). The memory (105) is not limited to volatile or non-volatile memory and can include one or more computer-readable storage media. Non-volatile storage elements such as magnetic hard disks, optical discs, floppy discs, flash memories, EPROM, or EEPROM memories can also be included in the memory (105). Further, the memory (105) of the UE (101) can store various information received from the network apparatus and. The UE (101) stores the information received in first signalling message, and second signalling message. The first signalling message and second signalling message incudes several information such as cell-DRX configuration, cell-DTX configuration, activation and deactivation status, Active Period and non-Active Period of the cell-DRX configuration.

[0093] The I / O interface (107) transmits information between the memory (105) and external peripheral devices, which are input-output devices associated with the UE (101). The I / O interface (107) receives various information from the network appartus. This information can include, but is not limited to, first signalling message, and second signalling message. The first signalling message and second signalling message incudes several information such as cell-DRX configuration, cell-DTX configuration, activation and deactivation status, Active Period and non-Active Period of the cell-DRX configuration.

[0094] The MBS controller (109) communicates with the I / O interface (107) and memory (105) for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The MBS controller (109) determines whether the at least one cell-DTX configuration is in Active Period or Non-Active Period, when the at least one cell-DTX configuration is activated. Further, the MBS controller (109) monitors at least one Point to Multipoint (PTM) Multicast Traffic channel (MTCH) for least one Group-Radio Network Temporary Identifier (G-RNTI) and Group-Configured Scheduling-Radio Network Temporary Identifier (G-CS-RNTI) and Point to Point (PTP) MTCH channel for at least one Cell-Radio Network Temporary Identifier (C-RNTI) and Configured Scheduling-Radio Network Temporary Identifier (CS-RNTI) during Active Period of the at least one cell-DTX configuration to receive MBS multicast service. Further, the MBS controller (109) skips to monitor at least PTM MTCH channel for at least one G-RNTI and G-CS-RNTI and PTP multicast MTCH channel for at least one C-RNTI and CS-RNTI to receive MBS multicast service, when each of the at least one cell-DTX configuration is in non-Active Period.

[0095] Fig. 2 is a block diagram that illustrates a network apparatus for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells, according to the embodiment as disclosed herein.

[0096] The network apparatus (201) includes a processor (203), a memory (205), an I / O interface (207), MBS controller (209). Furthermore, the processor (203) of the network apparatus (201) communicates with the memory (205), the I / O interface (207), and the MBS controller (209). The processor (203) is configured to execute instructions stored in the memory (205) and to perform various processes. The processor (203) can include one or a plurality of processors, can be a general-purpose processor such as a central processing unit (CPU), an application processor (AP), or the like, a graphics-only processing unit such as a graphics processing unit (GPU), a visual processing unit (VPU), and / or an Artificial Intelligence (AI) dedicated processor such as a neural processing unit (NPU).

[0097] Furthermore, the memory (205) of the network apparatus (201) includes storage locations that can be addressed through the processor (203). The memory (205) is not limited to volatile or non-volatile memory and can include one or more computer-readable storage media. Non-volatile storage elements such as magnetic hard disks, optical discs, floppy discs, flash memories, EPROM, or EEPROM memories can also be included in the memory (205). Further, the memory (205) of the network apparatus (201) can store various information received from the UE (101). The network apparatus (201) stores the information received from the UE (101) such as interested MBS multicast services and / or MBS broadcast services .

[0098] The I / O interface (207) transmits information between the memory (205) and external peripheral devices, which are input-output devices associated with the network apparatus (201). The I / O interface (207) receives various information from the UE (101).

[0099] The MBS controller (209) communicates with the I / O interface (207) and memory (205) for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells. The MBS controller (209) transmits a Multicast Broadcast Service (MBS) multicast service to a UE, when the UE is in at least one of a Radio Resource Configuration (RRC) CONNECTED state or RRC INACTIVE state. Further the MBS controller (209) transmits a first signalling message to the UE indicating at least one Active Period and non-Active Period of the at least one cell DRX configuration and cell DT configuration, wherein the first signalling message comprises at least one cell-Discontinuous Reception (DRX) configuration and cell-Discontinuous Transmission (DTX) configuration.

[0100] The embodiments herein achieve a achieve a mechanism for Network Energy Savings (NES) for multicast and broadcast transmissions. Embodiments herein specify how to apply the NES mode / configurations and Cell-DRX and / or Cell-DTX mechanism for the (a) UEs which are configured and / or receiving MBS broadcast services in the at least one of RRC_IDLE, RRC_INACTIVE and RRC_CONNECTED state, (b) UEs which are configured and / or receiving MBS multicast services in the RRC_CONNECTED state and (c) UEs which are configured and / or receiving MBS multicast services in the RRC_INACTIVE state.

[0101] In an embodiment, the Cell-DTX and / or Cell-DRX configurations may be provided for the serving cell. In another embodiment, the Cell-DTX and / or Cell-DRX configurations may be provided for a cell-group (CG). In yet another embodiment, the Cell-DTX and / or Cell-DRX configurations may be provided for one or more neighboring cells. In yet another embodiment, the Cell-DTX and / or Cell-DRX configurations may be provided for a MAC entity i.e. all cells belonging to the MAC entity have common configuration for Cell-DTX and / or Cell-DRX.

[0102] In an embodiment, Cell-DTX and Cell-DRX share one or more configuration parameters; e.g., DRX on duration, Cycle length, start offset etc. In another embodiment, Cell-DTX and Cell-DRX configuration share all configuration parameters and only one of them is explicitly signaled, while other can be known by an indication parameter that the same configuration is applicable for other.

[0103] In an embodiment, if the UE (101) is interested to receive or receiving MBS broadcast service in the NES cell and the UE (101) is configured with the at least one Cell-DRX and / or Cell-DTX configuration, the UE (101) may monitor for the at least one of the broadcast MBS Control Channel (MCCH), System Information Block (SIB) e.g. SIB20 and SIB21, MCCH change notification, broadcast MBS Traffic Channel (MTCH) only in the Active Time of the Cell-DRX and / or Cell-DTX configuration, wherein the Cell-DRX and / or Cell-DTX configuration considered is an activated configuration. The activation of the Cell-DRX and / or Cell-DTX configuration can be by default upon configuration and / or upon explicit activation; e.g., Downlink control Channel (DCI) based Cell-DRX and / or Cell-DTX activation / deactivation signaling for the relevant cell. Further, the UE (101) may skip monitoring for the at least one of the broadcast MBS Control Channel (MCCH), System Information Block (SIB), e.g., SIB20 and SIB21, MCCH change notification, broadcast MBS Traffic Channel (MTCH) in the non-Active Time of the Cell-DRX and / or Cell-DTX configuration, wherein the Cell-DRX and / or Cell-DTX configuration considered is an activated configuration. The UE may be at least in one of RRC_CONNECTED, RRC_INACTIVE and RRC_IDLE state.

[0104] In an embodiment, when the UE (101) skips MCCH change notification and / or broadcast MCCH monitoring due to non-Active Time of activated Cell-DTX configuration, the UE (101) considers the immediate next MCCH repetition period that comes up in the Active time of the activated Cell-DTX configuration to receive the MCCH change notification and / or broadcast MCCH message.

[0105] In an embodiment, the network apparatus (201) (hereinafter network is interchangeably used as network) sends an indication in a signaling message to the UE (101) whether the MBS broadcast transmission is performed or not in the non-Active time of the activated Cell-DRX and / or Cell-DTX configuration for the at least one serving cell. Accordingly, the UE (101) can receive or skip receiving the MBS broadcast transmission in the non-Active time of the activated Cell-DRX and / or Cell-DTX configuration for the at least one serving cell. The indication can be signaled in at least one of SIB (e.g., SIB1, SIB20, SIB21), broadcast MCCH, Medium Access Control (MAC) Control Element (CE) and RRC message (e.g., RRCRelease, RRCRelease with SuspendConfig, RRCReconfiguration message). The UE may be at least in one of RRC_CONNECTED, RRC_INACTIVE and RRC_IDLE state.

[0106] In an embodiment, it is pre-configured (in a network signaling message) and / or pre-specified (e.g., in 3GPP specification) whether the MBS broadcast transmission is to be performed or not in the non-Active time of the activated Cell-DRX and / or Cell-DTX configuration for the at least one serving cell. Accordingly, the UE (101) can monitor to receive or skip monitoring to receive the MBS broadcast transmission in the non-Active time of the activated Cell-DRX and / or Cell-DTX configuration for the at least one serving cell. In an embodiment, MBS broadcast is received irrespective of the Active time or non-Active time of the activated Cell-DRX and / or Cell-DTX configuration for the at least one serving cell. The UE (101) may be at least in one of RRC_CONNECTED, RRC_INACTIVE and RRC_IDLE state.

[0107] In an embodiment, the support for at least one of MBS broadcast, MBS multicast in RRC_CONNECTED state and MBS multicast in RRC_INACTIVE is not configured or is not allowed by the network on the NES Cell.

[0108] In an embodiment, NES mode of operation / configuration is not supported or is not allowed on the cell, which is supporting at least one of MBS broadcast, MBS multicast in RRC_CONNECTED state and MBS multicast in RRC_INACTIVE.

[0109] In an embodiment, if the UE (101) is configured or receiving MBS multicast service in the RRC_CONNECTED state in the NES cell and the UE (101) is configured with the at least one Cell-DRX and / or Cell-DTX configuration, the UE (101) may monitor for the at least one of the G-RNTI and G-CS-RNTI for the PTM multicast MTCH channels and the C-RNTI and CS-RNTI for the PTP multicast MTCH channels only in the Active Time of the Cell-DRX and / or Cell-DTX configuration, wherein the Cell-DRX and / or Cell-DTX configuration considered is an activated configuration. The activation of the Cell-DRX and / or Cell-DTX configuration can be by default upon configuration and / or upon explicit activation; e.g., Downlink control Channel (DCI) based Cell-DRX and / or Cell-DTX activation / deactivation signaling for the relevant cell. Further, the UE (101) may skip monitoring for the at least one of the G-RNTI and G-CS-RNTI for the PTM multicast MTCH channels and the C-RNTI and CS-RNTI for the PTP multicast MTCH channels in the non-Active Time of the Cell-DRX and / or Cell-DTX configuration, wherein the Cell-DRX and / or Cell-DTX configuration considered is an activated configuration.

[0110] In an embodiment, if the UE (101) is configured or receiving MBS multicast service in the RRC_INACTIVE state in the NES cell and the UE (101) is configured with the at least one Cell-DRX and / or Cell-DTX configuration, the UE (101) may monitor for the at least one of the SIBx for multicast, multicast MCCH, multicast MCCH change notification, Group paging, G-RNTI and G-CS-RNTI for the PDCCH and / or PDSCH for PTM multicast MTCH channels only in the Active Time of the Cell-DRX and / or Cell-DTX configuration, wherein the Cell-DRX and / or Cell-DTX configuration considered is an activated configuration. The activation of the Cell-DRX and / or Cell-DTX configuration can be by default upon configuration or upon explicit activation, e.g., Downlink control Channel (DCI) based Cell-DRX and / or Cell-DTX activation / deactivation signaling for the relevant cell. Further, the UE (101) may skip monitoring for the at least one of the SIBx for multicast, multicast MCCH, multicast MCCH change notification, Group paging, G-RNTI and G-CS-RNTI for the PTM multicast MTCH channels in the non-Active Time of the Cell-DRX and / or Cell-DTX configuration, wherein the Cell-DRX and / or Cell-DTX configuration considered is an activated configuration.

[0111] In an embodiment, when the UE (101) skips multicast MCCH change notification and / or multicast MCCH monitoring due to non-Active Time of activated Cell-DTX configuration, the UE (101) considers the immediate next MCCH repetition period that comes up in the Active time of the activated Cell-DTX configuration to receive the multicast MCCH change notification and / or multicast MCCH message.

[0112] In an embodiment, it is pre-configured / configured (in a network signaling message) and / or pre-specified (e.g., in 3GPP specification) whether the MBS multicast transmission is to be received or not by the RRC_INACTIVE state UE (101) in the non-Active time of the activated Cell-DRX and / or Cell-DTX configuration for the at least one serving cell. Accordingly, the UE (101) in the RRC_INACTIVE state can monitor to receive or skip monitoring to receive the MBS multicast transmission in the non-Active time of the activated Cell-DRX and / or Cell-DTX configuration for the at least one serving cell. The network (201) may provide the pre-configuration / configuration to the UE (101) in at least one of RRCRelease with suspendConfig message, multicast MCCH message and SIB message (e.g., existing SIB or a new SIB; i.e., SIBx).

[0113] In an embodiment, if drx-onDurationTimerPTM or drx-InactivityTimerPTM for this G-RNTI for MBS broadcast is running, the UE (101) may monitor PDCCH by using G-RNTI for the cell only in Cell-DTX Active Time. The UE (101) may be at least in one of RRC_CONNECTED, RRC_INACTIVE and RRC_IDLE state.

[0114] In an embodiment, the UE (101) may monitor PDCCH for MCCH-RNTI, only if the cell is in Cell-DTX Active Time, if that Cell-DTX is configured.

[0115] In an embodiment, the UE (101) may monitor PDCCH for MCCH-RNTI, only if the cell is in Cell-DTX Active Time, if that Cell-DTX is activated.

[0116] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if drx-onDurationTimerPTM or drx-InactivityTimerPTM for this G-RNTI and / or G-CS-RNTI for MBS multicast is running, the UE (101) may monitor PDCCH by using G-RNTI and / or G-CS-RNTI for the MBS multicast configured for the cell only in Cell-DTX Active Time.

[0117] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if drx-RetransmissionTimerDLPTM is running, the UE (101) may monitor PDCCH by using G-RNTI and G-CS-RNTI for the MBS multicast configured for the cell.

[0118] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if drx-RetransmissionTimerDLPTM is running, the UE (101) may monitor PDCCH by using G-RNTI / G-CS-RNTI regardless of Cell-DTX Non-Active Time / Active Time for the cell.

[0119] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if drx-RetransmissionTimerDLPTM is running, the Cell-DTX is considered as Active Time for the cell. Then, the UE follows Active Time Procedure, i.e., the UE (101) may monitor PDCCH by using G-RNTI / G-CS-RNTI only in Cell-DTX Active Time.

[0120] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state, the UE (101) may monitor PDCCH for G-RNTI and G-CS-RNTI when either 1) the cell is in Cell-DTX Active Time or 2) drx-RetransmissionTimerDLPTM for the G-RNTI / G-CS-RNTI is running.

[0121] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if drx-onDurationTimerPTM or drx-InactivityTimerPTM or RetransmissionTimerDLPTM for this G-RNTI and / or G-CS-RNTI for MBS multicast is running, the UE (101) may monitor PDCCH by using G-RNTI and / or G-CS-RNTI for the MBS multicast configured for the cell only in Cell-DTX Active Time.

[0122] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state, the UE (101) does not monitor multicast Semi-persistent Scheduling (SPS) occasions during Cell-DTX non-Active Period, if Cell-DTX is configured.

[0123] In an embodiment, Cell-DTX (Downlink) configuration may be configured in at least one of RRCRelease with SuspendConfig message and multicast MCCH message. If the UE (101) is configured with multicast reception in RRC_INACTIVE, the Cell-DTX configuration is useful. Then, the UE (101) may not monitor G-RNTI or multicast-MCCH-RNTI to enable more UE energy saving. The Cell-DTX configurations may be provided for the serving cell. In another embodiment, the Cell-DTX configurations may be provided for a cell-group (CG). In yet another embodiment, the Cell-DTX configurations may be provided for one or more neighboring cells. In yet another embodiment, the Cell-DTX configurations may be provided for a MAC entity; i.e., all cells belonging to the MAC entity have common configuration for Cell-DTX.

[0124] In an embodiment, the UE (101) may receive information to monitor PDCCH for activation / deactivation of Cell-DTX by group-signalling (i.e., Downlink Control Indication (DCI) signaling over PDCCH channel). The relevant information may include RNTI, search space, location of the DCI, cell or cell group identity, DRX configuration identity or index. For the DCI signalling, the Cell-DTX configuration and serving cell for which it is associated with is determined by the UE (101) by mapping ServCellIndex or serving cell identity or MAC entity identity or Cell Group (CG) identity or indexing of the configuration as provided in the RRCRelease and / or multicast MCCH message.

[0125] In an embodiment, the Cell-DRX (Uplink) configuration may be also configured. But in RRC_INACTIVE the UE (101) does not transmit anything, so Cell-DRX might not be so useful. That is, the UE (101) when configured or receiving multicast in RRC_INACTIVE state, ignores or invalidates the Cell-DRX configuration.

[0126] In an embodiment, all the Cell-DTX configurations (i.e., irrespective of whether the Cell-DTX configuration is in activated state or deactivated state) for the serving cell is provided in at least one of RRCRelease with SuspendConfig message and multicast MCCH message. The UE (101) can further receive the group signaling (i.e., DCI over PDCCH channel) and determine which of the Cell-DTX configurations are presently in activated state or in deactivated state. Accordingly, the UE (101) can act as per the activated Cell-DTX configurations for the serving cell while receiving multicast in the RRC_INACTIVE state.

[0127] In an embodiment, only the activated Cell-DTX configurations for the serving cell is provided in at least one of RRCRelease with SuspendConfig message and multicast MCCH message. That is, UE (101) is not required to receive the group signaling (i.e., DCI over PDCCH channel) and determine which of the Cell-DTX configurations are presently in activated state or in deactivated state. Accordingly, the UE (101) can act as per the activated Cell-DTX configurations for the serving cell while receiving multicast in the RRC_INACTIVE state.

[0128] In an embodiment, the UE (101) may store the Cell-DTX and / or Cell-DRX configurations that the UE (101) has received in the RRC_CONNECTED state through RRC reconfiguration message, while transiting to the RRC_INACTIVE state and may utilize the he Cell-DTX and / or Cell-DRX configurations for receiving the multicast in the RRC_INACTIVE state. The UE (101) can further receive the group signaling (i.e., DCI over PDCCH channel) and determine which of the Cell-DTX configurations are presently in activated state or in deactivated state. Accordingly, the UE (101) can act as per the activated Cell-DTX configurations.

[0129] In an embodiment, when the UE (101) which is configured and / or receiving multicast in RRC_INACTIVE, reselects to another cell, the UE (101) receives the multicast MCCH and / or group signalling (i.e., DCI signalling over PDCCH) on the reselected cell and determine the activated Cell-DTX configurations for the reselected cell. Accordingly, the UE (101) can act as per the activated Cell-DTX configurations for the reselected cell while receiving multicast in the RRC_INACTIVE state.

[0130] In an embodiment, in order to enhance the network energy savings further, the RRC_IDLE and / or RRC_INACTIVE UEs (101) are also informed about the Cell-DRX and / or Cell-DTX configurations through at least one of the SIB messages. Further, the activation and / or deactivation signalling for the Cell-DRX and / or Cell-DTX configurations may be received by RRC_IDLE and / or RRC_INACTIVE UEs from the group signalling (i.e., DCI over PDCCH). In another embodiment, only the activated Cell-DRX and / or Cell-DTX configurations are provided through at least one of the SIB messages.

[0131] Fig. 3 is a flow diagram that illustrates a method for handling multicast and broadcast transmissions in Network Energy Saving (NES) cells, according to the embodiments disclosed herein.

[0132] At block 301, the UE (101) determines whether the at least one cell-DTX configuration is in Active Period or Non-Active Period, when the at least one cell-DTX configuration is activated.

[0133] At block 303, the UE (101) monitors at least one Point to Multipoint (PTM) Multicast Traffic channel (MTCH) for least one Group-Radio Network Temporary Identifier (G-RNTI) and Group-Configured Scheduling-Radio Network Temporary Identifier (G-CS-RNTI) and Point to Point (PTP) MTCH channel for at least one Cell-Radio Network Temporary Identifier (C-RNTI) and Configured Scheduling-Radio Network Temporary Identifier (CS-RNTI) during Active Period of the at least one cell-DTX configuration to receive MBS multicast service.

[0134] At block 305, the UE (101) skips to monitor at least PTM MTCH channel for at least one G-RNTI and G-CS-RNTI and PTP multicast MTCH channel for at least one C-RNTI and CS-RNTI to receive MBS multicast service, when each of the at least one cell-DTX configuration is in non-Active Period.

[0135] Fig. 4 is a flow diagram that illustrates a method for handling by network apparatus multicast and broadcast transmissions in Network Energy Saving (NES) cells, according to the embodiment as disclosed herein.

[0136] At block 401, the method includes transmitting, by a network apparatus (201), a Multicast Broadcast Service (MBS) multicast service to the UE (101), when the UE (101) is in at least one of a Radio Resource Configuration (RRC) CONNECTED state or RRC INACTIVE state.

[0137] At block 403, the method includes transmitting, by the network apparatus (201), a first signalling message to the UE indicating at least one Active Period and non-Active Period of the at least one cell DRX configuration and cell DT configuration, wherein the first signalling message comprises at least one cell-Discontinuous Reception (DRX) configuration and cell-Discontinuous Transmission (DTX) configuration.

[0138] Fig. 5 is a flow diagram that illustrates a method for operational flow of DRX operation for the UE configured and / or receiving multicast in RRC_INACTIVE state in the cell configured with Cell-DTX, according to the embodiment as disclosed herein.

[0139] At block 501, consider the UE (101) is configured and / or receiving MBS multicast in RRC_INACTIVE state.

[0140] At block 503, consider the UE (101) is configured with cell-DTX configuration and at least one cell-DTX configuration and the cell-DTX configuration and at least one cell-DTX configuration is activated.

[0141] At block 505, the UE (101) determines if drx-onDurationTimerPTM or drx-InactivityTimerPTM for this G-RNTI and / or G-CS-RNTI for MBS multicast is running.

[0142] At block 507, the UE (101) determines if drx-retransmission timer DLPTM for this G-RNTI for MBS multicast is configured and running.

[0143] At block 509, the UE (101) may monitor PDCCH by using G-RNTI and / or G-CS-RNTI for the MBS multicast configured for the cell only in Cell-DTX Active Time, when the UE (101) is configured and / or receiving MBS multicast in RRC_INACTIVE state and when the drx-onDurationTimerPTM or drx-InactivityTimerPTM for this G-RNTI and / or G-CS-RNTI for MBS multicast is running.

[0144] At block 511, the UE (101), monitors PDCCH by using G-RNTI for the MBS multicast configured for the cell regardless of cell-DTX active time or non-active timer, when the drx-retransmission timer DLPTM for this G-RNTI for MBS multicast is configured and running.

[0145] At block 513, the UE (101) does not monitor PDCCH by using G-RNTI for the MBS multicast configured for the cell, when the drx-onduration timerPTM or drx-inactivitytimerPTM for this G-RNTI for MBS multicast is not running and when the drx-retransmission timer DLPTM for this G-RNTI for MBS multicast is at least not configured and not running.

[0146] In an embodiment, if the UE is (101) configured and / or receiving MBS multicast in RRC_INACTIVE state and if drx-RetransmissionTimerDLPTM is configured and running, the UE may monitor PDCCH by using G-RNTI and G-CS-RNTI for the MBS multicast configured for the cell.

[0147] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_INACTIVE state and if drx-RetransmissionTimerDLPTM is configured and running, the UE (101) may monitor PDCCH by using G-RNTI / G-CS-RNTI regardless of Cell-DTX Non-Active Time / Active Time for the cell.

[0148] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_INACTIVE state and if drx-RetransmissionTimerDLPTM is configured and running, the Cell-DTX is considered as Active Time for the cell. Then, the UE (101) follows Active Time Procedure, i.e., the UE (101) may monitor PDCCH by using G-RNTI / G-CS-RNTI only in Cell-DTX Active Time.

[0149] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_INACTIVE state, the UE (101) may monitor PDCCH for G-RNTI and G-CS-RNTI when either 1) the cell is in Cell-DTX Active Time or 2) drx-RetransmissionTimerDLPTM for the G-RNTI / G-CS-RNTI is configured and running.

[0150] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_INACTIVE state and if drx-onDurationTimerPTM or drx-InactivityTimerPTM or RetransmissionTimerDLPTM for this G-RNTI and / or G-CS-RNTI for MBS multicast is running, the UE (101) may monitor PDCCH by using G-RNTI and / or G-CS-RNTI for the MBS multicast configured for the cell only in Cell-DTX Active Time.

[0151] In an embodiment, the UE (101) may monitor PDCCH for multicast-MCCH-RNTI only if the cell is in Cell-DTX Active Time, in case that Cell-DTX is configured.

[0152] In an embodiment, the UE (101) may monitor PDCCH for multicast-MCCH-RNTI only if the cell is in Cell-DTX Active Time, in case that Cell-DTX is activated.

[0153] In an embodiment, SDT transmissions on the serving cell by the UE (101) in RRC_INACTIVE state may be restricted as per the Active time of the activated Cell-DRX configurations for the serving cell.

[0154] In an embodiment, SDT transmissions on the serving cell by the UE (101) in RRC_INACTIVE state are performed irrespective of the Active time or the non-Active Time of the activated Cell-DRX configurations for the serving cell.

[0155] In an embodiment, if DCP monitoring is configured for the active DL BWP and if the current symbol n occurs within drx-onDurationTimer duration and if drx-onDurationTimer associated with the current DRX cycle is not started and if the UE (101) is in Active Time of unicast DRX, the UE (101) may report Channel State Indication (CSI) and / or transmit Sounding Reference Signal (SRS) only in Cell-DRX Active Time for the cell. Cell-DRX Active Time for the cell considered is the activated Cell-DRX. The CSI may be at least one of CSI reported on Physical Uplink Control Channel (PUCCH) and semi-persistent CSI on Physical Uplink Shared Channel PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0156] In an embodiment, if DCP monitoring is configured for the active DL BWP and if the current symbol n occurs within drx-onDurationTimer duration and if drx-onDurationTimer associated with the current DRX cycle is not started and if UE (101) is in Active Time of unicast DRX, the UE (101) may report CSI and / or transmit SRS irrespective of the Cell-DRX Active Time or non-Active time for the cell. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0157] In an embodiment, if the UE (101) is in Active Time of unicast DRX, the UE (101) may report CSI and / or transmit SRS only in Cell-DRX Active Time for the cell. Cell-DRX Active Time for the cell considered is the activated Cell-DRX. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0158] In an embodiment, if the UE (101) is in Active Time of unicast DRX, the UE (101) may report CSI and / or transmit SRS irrespective of the Cell-DRX Active Time or non-Active time for the cell. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0159] In an embodiment, if the CSI masking is setup by upper layers and if drx-onDurationTimer is running, the UE (101) may report CSI and / or transmit SRS only in Cell-DRX Active Time for the cell. Cell-DRX Active Time for the cell considered is the activated Cell-DRX. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0160] In an embodiment, if the CSI masking is setup by upper layers and if drx-onDurationTimer is running, the UE (101) may report CSI and / or transmit SRS irrespective of the Cell-DRX Active Time or non-Active time for the cell. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0161] In an embodiment, if DCP monitoring is configured for the active DL BWP and if the current symbol n occurs within drx-onDurationTimer duration and if drx-onDurationTimer associated with the current DRX cycle is not started and if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if drx-onDurationTimerPTM or drx-InactivityTimerPTM or drx-RetransmissionTimerDLPTM for MBS multicast is running (i.e. Active Time of multicast) and if allowCSI-SRS-Tx-MulticastDRX-Active is configured, the UE (101) may report Channel State Indication (CSI) and / or transmit Sounding Reference Signal (SRS) only in Cell-DRX Active Time for the cell. Cell-DRX Active Time for the cell considered is the activated Cell-DRX. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0162] In an embodiment, if DCP monitoring is configured for the active DL BWP and if the current symbol n occurs within drx-onDurationTimer duration and if drx-onDurationTimer associated with the current DRX cycle is not started and if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if drx-onDurationTimerPTM or drx-InactivityTimerPTM or drx-RetransmissionTimerDLPTM for MBS multicast is running (i.e. Active Time of multicast) and if allowCSI-SRS-Tx-MulticastDRX-Active is configured, the UE (101) may report CSI and / or transmit SRS irrespective of the Cell-DRX Active Time or non-Active time for the cell. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0163] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if drx-onDurationTimerPTM or drx-InactivityTimerPTM or drx-RetransmissionTimerDLPTM for MBS multicast is running (i.e., Active Time of multicast) and if allowCSI-SRS-Tx-MulticastDRX-Active is configured, the UE (101) may report CSI and / or transmit SRS only in Cell-DRX Active Time for the cell. The Cell-DRX Active Time for the cell considered is the activated Cell-DRX. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0164] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if drx-onDurationTimerPTM or drx-InactivityTimerPTM or drx-RetransmissionTimerDLPTM for MBS multicast is running (i.e., Active Time of multicast) and if allowCSI-SRS-Tx-MulticastDRX-Active is configured, the UE (101) may report CSI and / or transmit SRS irrespective of the Cell-DRX Active Time or non-Active time for the cell. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0165] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if CSI masking is setup by upper layers and if drx-onDurationTimerPTM for MBS multicast is running and if allowCSI-SRS-Tx-MulticastDRX-Active is configured, the UE (101) may report CSI and / or transmit SRS only in Cell-DRX Active Time for the cell. Cell-DRX Active Time for the cell considered is the activated Cell-DRX. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0166] In an embodiment, if the UE (101) is configured and / or receiving MBS multicast in RRC_CONNECTED state and if CSI masking is setup by upper layers and if drx-onDurationTimerPTM for MBS multicast is running and if allowCSI-SRS-Tx-MulticastDRX-Active is configured, the UE (101) may report CSI and / or transmit SRS irrespective of the Cell-DRX Active Time or non-Active time for the cell. The CSI may be at least one of CSI reported on PUCCH and semi-persistent CSI on PUSCH. The SRS may be at least one of periodic SRS and semi-persistent SRS.

[0167] In an embodiment, HARQ feedback generation for the reception of the multicast transmission addressed to G-RNTI and / or G-CS-RNTI by the UE (101) (e.g., MAC entity in the UE) is allowed or disallowed based on the feedback transmission is occurring in the Active Time or non-Active Time of the activated Cell-DRX configuration respectively.

[0168] In an embodiment, at least one of CSI, Scheduling Request (SR), Sounding Reference Signal (SRS), Uplink Control Information (UCI) by the UE (e.g., MAC entity in the UE) is allowed or disallowed based on the transmission occasion is occurring in the Active Time or non-Active Time of the activated Cell-DRX configuration respectively.

[0169] In an embodiment, at least one of CSI, Scheduling Request (SR), SRS, Uplink Control Information (UCI) by the UE (e.g., MAC entity in the UE) is allowed or disallowed based on the transmission occasion is occurring in the Active Time or non-Active Time of the activated Cell-DRX configuration respectively.

[0170] Fig. 6 is a block diagram that illustrates a UE for signalling Semi-Persistent (SP) CSI report configuration activation and deactivation for NES cell, according to the embodiment as disclosed herein.

[0171] The User Equipment (601) includes a processor (603), a memory (605), an I / O interface (607), SP CSI report handler (609). Furthermore, the processor (603) of the UE (601) communicates with the memory (605), the I / O interface (607), and the SP CSI report handler (609). The processor (603) is configured to execute instructions stored in the memory (605) and to perform various processes. The processor (603) can include one or a plurality of processors, can be a general-purpose processor such as a central processing unit (CPU), an application processor (AP), or the like, a graphics-only processing unit such as a graphics processing unit (GPU), a visual processing unit (VPU), and / or an Artificial Intelligence (AI) dedicated processor such as a neural processing unit (NPU).

[0172] Furthermore, the memory (605) of the UE (601) includes storage locations that can be addressed through the processor (603). The memory (605) is not limited to volatile or non-volatile memory and can include one or more computer-readable storage media. Non-volatile storage elements such as magnetic hard disks, optical discs, floppy discs, flash memories, EPROM, or EEPROM memories can also be included in the memory (605). Further, the memory (605) of the UE (601) can store various information received from the network apparatus and. The UE (601) stores the information received in third signalling message. The third signalling message incudes several information such as SP CSI report configuration and an enhanced SP CSI report configuration.

[0173] The I / O interface (607) transmits information between the memory (605) and external peripheral devices, which are input-output devices associated with the UE (601). The I / O interface (607) receives various information from the network apparatus. This information can include, but is not limited to third signalling message. The third signalling message incudes several information such as SP CSI report configuration and an enhanced SP CSI report configuration.

[0174] The SP CSI report handler (609) communicates with the I / O interface (607) and memory (605) for signalling Semi-Persistent (SP) CSI report configuration activation and deactivation for NES cell. The SP CSI report handler (609) receive while in a NES cell, a third signalling message from a network apparatus that includes a SP CSI report configuration and an enhanced SP CSI report configuration to send the SP CSI report to the network apparatus, wherein the enhanced SP CSI report configuration comprises one or more sub-configurations. Further, the SP CSI report handler (609) receives while in a NES cell, from a network apparatus at least one of a SP CSI reporting activation or deactivation MAC CE and an enhanced SP CSI reporting activation or deactivation indication MAC CE to perform the SP CSI reporting to the network apparatus. Further, the SP CSI report handler (609) determines whether an activation / deactivation status of the SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1 or 0, when the legacy SP CSI reporting activation or deactivation MAC CE is received by the UE (601). Further, the SP CSI report handler (609) interprets that at least one activated sub-configuration of enhanced SP CSI repor configuration remains activated and at least one deactivated sub-configuration of enhanced SP CSI report configuration remains deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1. Also, the SP CSI report handler (609) interprets that all sub-configurations of the enhanced SP CSI reporting configuration are deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 0.

[0175] In an embodiment, the SP CSI report handler (609) determines whether the activation / deactivation status of pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1 or 0. Further, the SP CSI report handler (609) interprets that all the sub-configuration of the enhanced SP CSI report configuration are deactivated, when the activation / deactivation status of the pertinent SP CSI configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1. Also, the SP CSI report handler (609) interprets that all sub-configuration of the enhanced SP CSI reporting activation or deactivation MAC CE are deactivated and storing activation / deactivation status of the one or more sub-configurations of the enhanced SP CSI reporting activation or deactivation MAC CE, when the activation / deactivation status field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 0.

[0176] Fig. 7 is a block diagram that illustrates network apparatus for signalling Semi-Persistent (SP) CSI report configuration activation and deactivation for NES cell, according to the embodiment as disclosed herein.

[0177] The network apparatus (701) includes a processor (703), a memory (705), an I / O interface (207), SP CSI report handler (709). Furthermore, the processor (703) of the network apparatus (701) communicates with the memory (705), the I / O interface (707), and the SP CSI report handler (709). The processor (703) is configured to execute instructions stored in the memory (705) and to perform various processes. The processor (703) can include one or a plurality of processors, can be a general-purpose processor such as a central processing unit (CPU), an application processor (AP), or the like, a graphics-only processing unit such as a graphics processing unit (GPU), a visual processing unit (VPU), and / or an Artificial Intelligence (AI) dedicated processor such as a neural processing unit (NPU).

[0178] Furthermore, the memory (705) of the network apparatus (701) includes storage locations that can be addressed through the processor (703). The memory (705) is not limited to volatile or non-volatile memory and can include one or more computer-readable storage media. Non-volatile storage elements such as magnetic hard disks, optical discs, floppy discs, flash memories, EPROM, or EEPROM memories can also be included in the memory (705). Further, the memory (705) of the network apparatus (501) can store various information received from the UE (601).

[0179] The I / O interface (707) transmits information between the memory (705) and external peripheral devices, which are input-output devices associated with the network apparatus (701). The I / O interface (707) receives various information from the UE (601).

[0180] The SP CSI report handler (709) communicates with the I / O interface (707) and memory (705) for signalling Semi-Persistent (SP) CSI report configuration activation and deactivation for NES cell. The SP CSI report handler (709) determine whether the UE (601) is capable to support the enhanced SP CSI report configuration. Further, SP CSI report handler (709) selects at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE for transmission to the UE (601) based on resource efficiency. The enhanced SP CSI reporting configuration comprises one or more sub-configurations. Further, the SP CSI report handler (709) transmits at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE on PUCCH based on the selection.

[0181] In an embodiment, the legacy MAC CE (Rel-15) can be used together with the enhanced MAC CE (rel-18).

[0182] In an embodiment, in some cases (e.g. SCell activation), 1-octet format and 4-octet format can be used together according to the NW's choice by considering resource efficiency (e.g. overhead size). In other cases (e.g. duplication activation), only one format is used by considering configuration. Considering Rel-18 MAC CE has relatively larger size with eLCID field, it would be advantageous to use Rel-15 MAC CE when it is efficient.

[0183] Option 1. Only one type of MAC CE is used, depending on configuration.

[0184] If there is at least one report configuration which includes PUCCH resources for SP CSI reporting in the indicated BWP and Serving Cell and includes report sub-configuration, Rel-18 MAC CE is used.

[0185] If there is no report configuration which includes PUCCH resources for SP CSI reporting in the indicated BWP and Serving Cell and includes report sub-configuration, Rel-15 MAC CE is used.

[0186] Option 2. Two MAC CEs are used by gNB implementation (gNB's choice).

[0187] In this case the UE behavior when the legacy MAC CE is received and sub-configuration should be specified in the spec:

[0188] When the UE (601) receives legacy MAC CE with Si=1(activate CSI configuration) is received:

[0189] Alt 1: All activated sub-configurations for the configuration with Si=1 remain activated. All deactivated sub-configurations for the configuration with Si=1 remain deactivated

[0190] Alt 2: Only configuration with Si=1 is activated. All sub-configurations for the configuration with Si=1 are deactivated.

[0191] When the UE (601) receives legacy MAC CE with Si=0 (deactivate CSI configuration) is received:

[0192] Alt 1: The configuration and all its sub-configurations are deactivated.

[0193] Alt 2: The configuration and all its sub-configurations are deactivated. But all activation / deactivation statuses of sub-configurations are stored and will be used in the next activation by the legacy MAC CE.

[0194] In an embodiment, an specification example is provided for the activation and deactivation of the Semi-persistent CSI reporting on PUCCH as follows:

[0195] Specification Example:

[0196] - Initial state and delivery to the lower layer needs to be specified.

[0197] [table 2]

[0198]

[0199] In an embodiment, UE (601) consider Cell-DRX configurations per serving cell and not report SP CSI for relevant configurations and sub-configurations on PUCCH for NES cell(s) among the serving cell(s) which are not Active Time of the Cell-DRX. That is, UE (601) performs selective behaviour for legacy cell and NES cell.

[0200] In an embodiment, the UE (601) sends a UE capability message to inform the network apparatus (701) about the UE capability or support for enhanced SP CSI reporting on PUCCH activation / deactivation and / or enhanced SP CSI reporting on PUCCH and / or enhanced SP CSI reporting on PUSCH.

[0201] For N>=1 CSI reporting corresponding to N out of L sub-configurations in one reportConfig where each sub-configuration corresponding to an spatial domain (SD) adaptation pattern or / [and] apowerControlOffsetvalue:

[0202] - For SP-CSI on PUCCH report, support MAC-CE-based triggering

[0203] - For MAC-CE based triggering

[0204] > Opt 2: An indication to select to N sub-configurations in a MAC-CE is supported

[0205] >>　It is up to RAN2 to decide the signaling designs of the MAC-CE (including whether it is a new MAC CE or an existing MAC CE)

[0206] >> Only one MAC CE is used for this triggering

[0207] Recently, 3GPP RAN2 WG discussed about format of the new MAC CE. A potential format is described by Fig. 11 for Enhanced SP CSI reporting on PUCCH Activation / Deactivation MAC CE.

[0208] Fig. 8 is a flow diagram that illustrates a method for signalling Semi-Persistent (SP) CSI report configuration activation and deactivation for NES cell by network UE, according to the embodiment as disclosed herein.

[0209] At block 801, the method includes receiving, by the UE (601), while in a NES cell, a third signalling message from the network apparatus (701) that includes a SP CSI report configuration and an enhanced SP CSI report configuration to send the SP CSI report to the network apparatus, wherein the enhanced SP CSI report configuration comprises one or more sub-configurations.

[0210] At block 803, the method includes receiving, by the UE (601), while in a NES cell, from the network apparatus (701) at least one of a SP CSI reporting activation or deactivation MAC CE and an enhanced SP CSI reporting activation or deactivation indication MAC CE to perform the SP CSI reporting to the network apparatus.

[0211] At block 805, the method includes determining, by the UE (601), whether an activation / deactivation status of the SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1 or 0, when the legacy SP CSI reporting activation or deactivation MAC CE is received by the UE.

[0212] At block 807, the method includes interpreting, by the UE (601), that at least one activated sub-configuration of enhanced SP CSI report configuration remains activated and at least one deactivated sub-configuration of enhanced SP CSI configuration remains deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1.

[0213] At block 809, the method includes interpreting, by the UE (601), that all sub-configurations of the enhanced SP CSI report configuration are deactivated, when the activation / deactivation status of the pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 0.

[0214] Fig. 9 is a flow diagram that illustrates a method for signalling Semi-Persistent (SP) CSI report configuration activation and deactivation for NES cell, according to the embodiment as disclosed herein.

[0215] At block 901, the method includes receiving, by the UE (601), while in a NES cell, a third signalling message from the network apparatus (701) that includes a SP CSI report configuration and an enhanced SP CSI report configuration to send the SP CSI report to the network apparatus, wherein the enhanced SP CSI report configuration comprises one or more sub-configurations.

[0216] At block 903, the method includes receiving, by the UE (601), while in a NES cell, from the network apparatus (701) at least one of a SP CSI reporting activation or deactivation MAC CE and an enhanced SP CSI reporting activation or deactivation indication MAC CE to perform the SP CSI reporting to the network apparatus.

[0217] At block 905, the method includes determining, by the UE (601), whether the activation / deactivation status of pertinent SP CSI report configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1 or 0.

[0218] At block 907, the method includes interpreting, by the UE (601), that all the sub-configuration of the enhanced SP CSI repor configuration are deactivated, when the activation / deactivation status of the pertinent SP CSI configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 1.

[0219] At block 909, the method includes interpreting, by the UE (601), that all the sub-configuration of the enhanced SP CSI report configuration are deactivated and storing activation / deactivation status of the one or more sub-configurations of the enhanced SP CSI report configuration, when the activation / deactivation status of the pertinent SP CSI configuration field in the legacy SP CSI reporting activation or deactivation MAC CE is set to 0.

[0220] Fig. 10 is a flow diagram that illustrates a method for signalling Semi-Persistent (SP) CSI report configuration activation and deactivation for NES cell by network apparatus, according to the embodiment as disclosed herein.

[0221] At block 1001, the method includes determining, by the network apparatus (701), whether the UE (601) is capable to support the enhanced SP CSI report configuration.

[0222] At block 1003, the method includes selecting, by the network apparatus (701), at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE for transmission to the UE based on resource efficiency, wherein the enhanced SP CSI reporting configuration comprises one or more sub-configurations.

[0223] At block 1005, the method includes transmitting, by the network apparatus (701), at least one of a legacy SP CSI reporting activation or deactivation MAC CE or an enhanced SP CSI reporting activation or deactivation MAC CE on PUCCH based on the selection.

[0224] The various actions, acts, blocks, steps, or the like in the method is performed in the order presented, in a different order or simultaneously. Further, in some embodiments, some of the actions, acts, blocks, steps, or the like are omitted, added, modified, skipped, or the like without departing from the scope of the proposed method.

[0225] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the scope of the embodiments as described herein.

[0226] 101: User Equipment

[0227] 103: Processor

[0228] 105: Memory

[0229] 107: I / 0 interface

[0230] 109: MBS controller

[0231] 201: Network apparatus

[0232] 203: Processor

[0233] 205: Memory

[0234] 207: Memory

[0235] 209: MBS controller

[0236] 601: User Equipment

[0237] 603: Processor

[0238] 605: Memory

[0239] 607: I / O interface

[0240] 609: SP CSI report handler

[0241] 701: Network apparatus

[0242] 703: Processor

[0243] 705: Memory

[0244] 707: I / O interface

[0245] 709: SP CSI report handler

Claims

1.A method performed by a terminal in a wireless communication system, the method comprising:receiving, from a base station, a cell discontinuous transmission (DTX) configuration for a serving cell of the terminal;identifying whether a cell DTX operation is activated;in case that the cell DTX operation is activated and the serving cell is not in a cell DTX active period, not monitoring a physical downlink control channel (PDCCH) for a group-radio network temporary identifier (G-RNTI) or a group-configured scheduling-radio network temporary identifier (G-CS-RNTI) for multicast broadcast service (MBS) multicast.2.The method of claim 1,wherein semi-persistent scheduling (SPS) occasions are not monitored in a cell DTX non-active period.3.The method of claim 1,wherein at least one of point to multipoint (PTM) multicast traffic channel (MTCH) for the G-RNTI or the G-CS-RNTI and point to point (PTP) MTCH for a cell-radio network temporary identifier (C-RNTI) or configured scheduling-radio network temporary identifier (CS-RNTI) is monitored in the cell DTX active period, andwherein at least one of PTM MTCH for the G-RNTI or the G-CS-RNTI and PTP MTCH for the C-RNTI or the CS-RNTI is not monitored in a cell DTX non active period.4.The method of claim 1, further comprising:in case that a cell discontinuous reception (DRX) is activated for the serving cell and the serving cell is in a cell DRX non active period, not transmitting a sounding reference signal (SRS) to the serving cell.5.A method performed by a base station in a wireless communication system, the method comprising:transmitting, to a terminal, a cell discontinuous transmission (DTX) configuration for a serving cell of the terminal; andtransmitting, to the terminal, information activating a cell DTX operation,wherein, in case that the cell DTX operation is activated and the serving cell is not in a cell DTX active period, a physical downlink control channel (PDCCH) for a group-radio network temporary identifier (G-RNTI) or a group-configured scheduling-radio network temporary identifier (G-CS-RNTI) is not monitored for multicast broadcast service (MBS) multicast.6.The method of claim 5,wherein semi-persistent scheduling (SPS) occasions are not monitored in a cell DTX non-active period.7.The method of claim 5,wherein at least one of point to multipoint (PTM) multicast traffic channel (MTCH) for the G-RNTI or the G-CS-RNTI and point to point (PTP) MTCH for a cell-radio network temporary identifier (C-RNTI) or configured scheduling-radio network temporary identifier (CS-RNTI) is monitored in the cell DTX active period, andwherein at least one of PTM MTCH for the G-RNTI or the G-CS-RNTI and PTP MTCH for the C-RNTI or the CS-RNTI is not monitored in a cell DTX non active period.8.The method of claim 5, further comprising:in case that a cell discontinuous reception (DRX) is activated for the serving cell and the serving cell is in a cell DRX non active period, not receiving a sounding reference signal (SRS) for the serving cell from the terminal.9.A terminal in a wireless communication system, the terminal comprising:a transceiver; anda controller operably coupled to the transceiver, configured to:receive, from a base station, a cell discontinuous transmission (DTX) configuration for a serving cell of the terminal,identify whether a cell DTX operation is activated,in case that the cell DTX operation is activated and the serving cell is not in a cell DTX active period, not monitor a physical downlink control channel (PDCCH) for a group-radio network temporary identifier (G-RNTI) or a group-configured scheduling-radio network temporary identifier (G-CS-RNTI) for multicast broadcast service (MBS) multicast.10.The terminal of claim 9,wherein semi-persistent scheduling (SPS) occasions are not monitored in a cell DTX non-active period.11.The terminal of claim 9,wherein at least one of point to multipoint (PTM) multicast traffic channel (MTCH) for the G-RNTI or the G-CS-RNTI and point to point (PTP) MTCH for a cell-radio network temporary identifier (C-RNTI) or configured scheduling-radio network temporary identifier (CS-RNTI) is monitored in the cell DTX active period, andwherein at least one of PTM MTCH for the G-RNTI or the G-CS-RNTI and PTP MTCH for the C-RNTI or the CS-RNTI is not monitored in a cell DTX non active period.12.The terminal of claim 9,wherein, in case that a cell discontinuous reception (DRX) is activated for the serving cell and the serving cell is in a cell DRX non active period, the controller is configured not to transmit a sounding reference signal (SRS) to the serving cell.13.A base station in a wireless communication system, the base station comprising:a transceiver; anda controller operably coupled to the transceiver, configured to:transmit, to a terminal, a cell discontinuous transmission (DTX) configuration for a serving cell of the terminal, andtransmit, to the terminal, information activating a cell DTX operation,wherein, in case that the cell DTX operation is activated and the serving cell is not in a cell DTX active period, a physical downlink control channel (PDCCH) for a group-radio network temporary identifier (G-RNTI) or a group-configured scheduling-radio network temporary identifier (G-CS-RNTI) is not monitored for multicast broadcast service (MBS) multicast.14.The method of claim 13,wherein semi-persistent scheduling (SPS) occasions are not monitored in a cell DTX non-active period,wherein at least one of point to multipoint (PTM) multicast traffic channel (MTCH) for the G-RNTI or the G-CS-RNTI and point to point (PTP) MTCH for a cell-radio network temporary identifier (C-RNTI) or configured scheduling-radio network temporary identifier (CS-RNTI) is monitored in the cell DTX active period, andwherein at least one of PTM MTCH for the G-RNTI or the G-CS-RNTI and PTP MTCH for the C-RNTI or the CS-RNTI is not monitored in a cell DTX non active period.15.The base station of claim 13,wherein, in case that a cell discontinuous reception (DRX) is activated for the serving cell and the serving cell is in a cell DRX non active period, the controller is configured not to receive a sounding reference signal (SRS) for the serving cell from the terminal.

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