On-demand system information
The enhancement of on-demand system information (OD-SI) in wireless communications systems by allowing base stations to receive and transmit system information on demand for network energy saving (NES) cells addresses inefficiencies and improves communication efficiency and flexibility.
Patent Information
- Application Number
- PCT/CN2024/111124
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-30
AI Technical Summary
Current on-demand system information (OD-SI) schemes in wireless communications lack efficiency and flexibility, particularly in supporting network energy saving (NES) cells, leading to suboptimal communication performance.
The proposed solution involves a method and apparatus for improving OD-SI by allowing base stations to receive and transmit system information on demand from user equipment (UE) specifically for NES cells, including the transmission of target information such as version information of system information blocks.
This approach enhances communication efficiency by allowing for flexible and timely transmission of system information, reducing signaling overhead, and improving the overall performance of NES cells in wireless communications systems.
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Figure CN2024111124_30052025_PF_FP_ABST
Abstract
Description
ON-DEMAND SYSTEM INFORMATIONTECHNICAL FIELDThe present disclosure relates to wireless communications, and more specifically to on-demand system information (OD-SI) .BACKGROUNDA wireless communications system may include one or multiple network communication devices, such as base stations (BSs) , which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication device, such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .The SI consists of a master information block (MIB) and a number of system information blocks (SIBs) . The SI is divided into the Minimum SI and Other SI (OSI) . The Minimum SI comprises basic information required for initial access and information for acquiring any other SI, which consists of the MIB and a system information block 1 (SIB1) . The MIB contains cell barred status information and / or essential physical layer information of a cell required to receive further system information. The MIB may be periodically transmitted. The SIB1 defines the scheduling of other SIBs and / or contains information required for initial access. The OSI may contain information related to cell re-selection. New radio (NR) release 15 (Rel-15) supports on-demand Other SI (OD-OSI) . However, enhancements on the OD-SI are still needed.SUMMARYThe present disclosure relates to methods, apparatuses, and systems that support the OD-SI. With the apparatuses and methods, it is allowed to improve the efficiency of communications.In some implementations, there is provided a first base station (BS) . The first BS comprises at least one memory, and at least one processor coupled with the at least one memory and configured to cause the first BS to: receive, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of the first BS; and transmit the SI to the UE.In some implementations, there is provided a method performed by the first BS. The method comprises: receiving, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of the first BS; and transmitting the SI to the UE.In some implementations, there is provided a processor for wireless communication. The processor comprises at least one controller coupled with at least one memory and configured to cause the processor to: receive, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of the first BS; and transmit the SI to the UE.Some implementations of the method and the first BS described herein may further include transmitting target information associated with the SI to the UE.In some implementations of the method and the first BS described herein, the target information comprises version information of a system information block 1 (SIB1) . In some implementations of the method and the first BS described herein, the version information comprises a value tag of the SIB1. In some implementations of the method and the first BS described herein, the version information is indicated in one or more of the following: a master information block (MIB) of the NES cell; a physical broadcast channel (PBCH) of the NES cell; or a demodulation reference signal (DMRS) index of the MIB of the NES cell. Some implementations of the method and the first BS described herein may further include receiving, from the UE, a further request for the SIB1; and transmitting the SIB1 to the UE.In some implementations, there is provided a second base station (BS) . The second device comprises at least one memory, and at least one processor coupled with the at least one memory and configured to cause the second BS to: receive, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of a first BS; and transmit the SI to the UE.In some implementations, there is provided a method performed by the second BS. The method comprises: receiving, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of a first BS; and transmitting the SI to the UE.In some implementations, there is provided a processor for wireless communication. The processor comprises at least one controller coupled with at least one memory and configured to cause the processor to: receive, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of a first BS; and transmit the SI to the UE.Some implementations of the method and the second BS described herein may further include transmitting target information associated with the SI to the UE.In some implementations of the method and the second BS described herein, the target information comprises version information of a system information block 1 (SIB1) for the NES cell. In some implementations of the method and the second BS described herein, the version information comprises a value tag of the SIB1. In some implementations of the method and the second BS described herein, the version information is indicated in one or more of the following: a SIB1 for a cell of the second BS; a further system information block (SIB) for a cell of the second BS; or a radio resource control (RRC) release message from a cell of the second BS. Some implementations of the method and the second BS described herein may further include receiving the version information from the first BS. Some implementations of the method and the second BS described herein may further include receiving the SIB1 for the NES cell from the first BS. Some implementations of the method and the second BS described herein may further include receiving, from the UE, a request for the SIB1 and / or one or more other system information blocks (SIBs) for the NES cell; and transmitting the SIB1 and / or the one or more other SIBs to the UE.In some implementations of the method and the second BS described herein, the target information comprises an SI change indication. In some implementations of the method and the second BS described herein, the SI change indication may be indicated in one or more of the following: an RRC release message from a cell of the second BS; a short message on a physical downlink control channel (PDCCH) from a cell of the second BS. In some implementations of the method and the second BS described herein, the SI change indication is associated with an SIB1 for the NES cell.In some implementations of the method and the second BS described herein, the SI is transmitted in a first time window different from a second time window used for transmitting SI of a cell of the second BS. In some implementations of the method and the second BS described herein, the first time window is associated with the NES cell.In some implementations of the method and the second BS described herein, a PDCCH scheduling the SI is identified by an identifier associated with the NES cell.In some implementations of the method and the second BS described herein, a search space or ControlResourceSet (CORESET) of a PDCCH scheduling the SI is associated with the NES cell.In some implementations of the method and the second BS described herein, the target information or the SI is transmitted to the UE together with information for identifying the NES cell.In some implementations of the method and the second BS described herein, a PDCCH scheduling the target information or the SI comprises information for identifying the NES cell.In some implementations of the method and the second BS described herein, the SI comprises one or more of the following: information on one or more barred cells; information on whether an intra frequency cell is allowed to be re-selected by the UE; information on a subcarrier spacing; information on a frequency domain offset between a synchronization signal block (SSB) and an overall resource block grid in a number of subcarriers; information on a position of a demodulation reference signal (DMRS) ; or information on a common ControlResourceSet (CORESET) or a common search space of a PDCCH.In some implementations of the method and the second BS described herein, the request for the SI for the NES cell further requests one or more SIs for one or more further NES cells, and wherein the SI for the NES cell and the one or more SIs for the one or more further NES cells are transmitted to the UE together or respectively.Some implementations of the method and the second BS described herein may further include receiving, from the UE, one or more requests for one or more SIs for one or more further NES cells; and transmitting, to the UE, the one or more SIs.In some implementations of the method and the second BS described herein, the SI comprises at least one of first cell related information for cell re-selection or second cell related information for cell re-selection, and the first cell related information indicates one or more cells to be excluded for cell reselection for a UE not supporting camping at an NES cell, and the second cell related information indciates one or more cells to be excluded for cell reselection for a UE supporting camping at an NES cell.In some implementations of the method and the second BS described herein, the SI comprises at least one of the third cell related information for cell re-selection or fourth cell related information for cell re-selection, and the third cell related information indicates one or more cells with first re-selection parameters for cell reselection for a UE not supporting camping at an NES cell, and the fourth cell related information indicates one or more cells with first re-selection parameters for cell reselection for a UE supporting camping at an NES cell.In some implementations, there is provided a user equipment (UE) . The UE comprises at least one memory, and at least one processor coupled with the at least one memory and configured to cause the UE to: transmit, to a first base station (BS) or a second BS, a request for system information (SI) for a network energy saving (NES) cell of the first BS; and receive the SI from the first BS or the second BS.In some implementations, there is provided a method performed by the first UE. The method comprises: transmitting, to a first base station (BS) or a second BS, a request for system information (SI) for a network energy saving (NES) cell of the first BS; and receiving the SI from the first BS or the second BS.In some implementations, there is provided a processor for wireless communication. The processor comprises at least one controller coupled with at least one memory and configured to cause the processor to: transmit, to a first base station (BS) or a second BS, a request for system information (SI) for a network energy saving (NES) cell of the first BS; and receive the SI from the first BS or the second BS.Some implementations of the method and the UE described herein may further include receiving target information associated with the SI from the first BS or the second BS.In some implementations of the method and the UE described herein, the SI is requested based on the target information.In some implementations of the method and the UE described herein, the target information comprises version information of a system information block 1 (SIB1) . In some implementations of the method and the UE described herein, the version information comprises a value tag of the SIB1. In some implementations of the method and the UE described herein, the target information is received from the first BS, and the version information is indicated in one or more of the following: a master information block (MIB) of the NES cell; a physical broadcast channel (PBCH) of the NES cell; or a demodulation reference signal (DMRS) index of the MIB of the NES cell.In some implementations of the method and the UE described herein, the target information comprises version information of an SIB1 for the NES cell and version information of one or more other system information blocks (SIBs) for the NES cell.Some implementations of the method and the UE described herein may further include transmitting, to the first BS, a further request for the SIB1 for the NES cell and one or more other system information blocks (SIBs) for the NES cell; and receiving the SIB1 and the one or more other SIBs from the first BS.In some implementations of the method and the UE described herein, the target information is received from the second BS, and the version information is indicated in one or more of the following: a SIB1 for a cell of the second BS; a further system information block (SIB) for a cell of the second BS; or a radio resource control (RRC) release message from a cell of the second BS.In some implementations of the method and the UE described herein, the target information is received from the second BS, and the target information comprises an SI change indication. In some implementations of the method and the UE described herein, the SI change indication is indicated in one or more of the following: an RRC release message from a cell of the second BS; a short message on a physical downlink control channel (PDCCH) from a cell of the second BS. In some implementations of the method and the UE described herein, the SI change indication is associated with an SIB1 for the NES cell.In some implementations of the method and the UE described herein, the SI is received from the second BS, and the SI is transmitted in a first time window different from a second time window used for transmitting SI of a cell of the second BS. In some implementations of the method and the UE described herein, the first time window is associated with the NES cell.In some implementations of the method and the UE described herein, the SI is received from the second BS, and a PDCCH scheduling the SI is identified by an identifier associated with the NES cell.In some implementations of the method and the UE described herein, the SI is received from the second BS, and a search space or ControlResourceSet (CORESET) of a PDCCH scheduling the SI is associated with the NES cell.In some implementations of the method and the UE described herein, the target information or the SI is received from the second BS, and the target information or the SI is received together with information for identifying the NES cell.In some implementations of the method and the UE described herein, the SI is received from the second BS, and a PDCCH scheduling the SI comprises information for identifying the NES cell.In some implementations of the method and the UE described herein, the SI is received from the second BS, and the SI comprises one or more of the following: information on one or more barred cells; information on whether an intra frequency cell is allowed to be re-selected by the UE; information on a subcarrier spacing; information on a frequency domain offset between a synchronization signal block (SSB) and an overall resource block grid in a number of subcarriers; information on a position of a demodulation reference signal (DMRS) ; or information on a common ControlResourceSet (CORESET) or a common search space ofa PDCCH.In some implementations of the method and the UE described herein, the SI is received from the second BS, and the request for the SI for the NES cell further requests one or more SIs for one or more further NES cells, and wherein the SI for the NES cell and the one or more SIs for the one or more further NES cells may be received together or respectively.Some implementations of the method and the UE described herein may further include transmitting, to the second BS, one or more further requests for one or more SIs for one or more further NES cells; and receiving, from the second BS, the one or more SIs.In some implementations of the method and the UE described herein, the one or more further NES cells are determined based on ranking level information of the one or more further NES cells.In some implementations of the method and the UE described herein, the SI for the NES cell and the one or more SIs for the one or more further NES cells are requested based on the target information associated with the SI for the NES cell and one or more further target information associated with the one or more SIs for the one or more further NES cells.In some implementations of the method and the UE described herein, the SI comprises at least one of first cell related information for cell re-selection or second cell related information for cell re-selection, and wherein the first cell related information indicates one or more cells to be excluded for cell reselection for a UE not supporting camping at an NES cell, and the second cell related information indciates one or more cells to be excluded for cell reselection for a UE supporting camping at an NES cell. Some implementations of the method and the UE described herein may further include ignoring the first cell related information. Some implementations of the method and the UE described herein may further include considering a cell not included in the second cell related information as a candidate cell for cell selection.In some implementations of the method and the UE described herein, the SI comprises at least one of third cell related information for cell re-selection or fourth cell related information for cell re-selection, and the third cell related information indicates one or more cells with first re-selection parameters for cell reselection for a UE not supporting camping at an NES cell, and the fourth cell related information indicates one or more cells with first re-selection parameters for cell reselection for a UE supporting camping at an NES cell.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1A illustrates an example of a wireless communications system that supports the OD-SI in accordance with aspects of the present disclosure;FIG. 1B illustrates another example of a wireless communications system associated with aspects of the present disclosure;FIGS. 2 and 3 illustrate example process flows in accordance with some example embodiments of the present disclosure;FIG. 4 illustrates an example OD-SI request procedure in accordance with some example embodiments of the present disclosure;FIG. 5 illustrates a further example wireless communications system associated with aspects of the present disclosure;FIG. 6 illustrates an example of a device that supports the OD-SI in accordance with aspects of the present disclosure;FIG. 7 illustrates an example of a processor that supports the OD-SI in accordance with aspects of the present disclosure; andFIGS. 8 through 10 illustrate flowcharts of methods that support the OD-SI in accordance with aspects of the present disclosure.Throughout the drawings, the same or similar reference numerals represent the same or similar elements.DETAILED DESCRIPTIONPrinciples of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein may be implemented in various manners other than the ones described below.In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.As used herein, the term “communication network” refers to a network following any suitable communication standards, such as, 5G new radio (NR) , LTE, LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) , and so on. Further, the communications between a UE and a network device in the communication network may be performed according to any suitable generation communication protocols, including but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the 4G, 4.5G, the 5G communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will also be future type communication technologies and systems in which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned systems.As used herein, the term “network device” generally refers to a node in a communication network via which a UE can access the communication network and receive services therefrom. The network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , a radio access network (RAN) node, an evolved NodeB (eNodeB or eNB) , a NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , an infrastructure device for a vehicle-to-everything (V2X) communication, a transmission and reception point (TRP) , a reception point (RP) , a remote radio head (RRH) , a relay, an integrated access and backhaul (IAB) node, a low power node such as a femto a base station (BS) , a pico BS, and so forth, depending on the applied terminology and technology. The network device may further refer to a network function (NF) in the core network, for example, a service management function (SMF) , an access and mobility management function (AMF) , a policy control function (PCF) , a user plane function (UPF) or devices with same function in future network architectures, and so forth.As used herein, the term “user equipment (UE) ” generally refers to any end device that may be capable of wireless communications. By way of example rather than a limitation, a UE may also be referred to as a communication device, a terminal device, an end user device, a subscriber station (SS) , an unmanned aerial vehicle (UAV) , a portable subscriber station, a mobile station (MS) , or an access terminal (AT) . The UE may include, but is not limited to, a mobile phone, a cellular phone, a smart phone, a voice over IP (VoIP) phone, a wireless local loop phone, a tablet, a wearable UE, a personal digital assistant (PDA) , a portable computer, a desktop computer, an image capture UE such as a digital camera, a gaming UE, a music storage and playback appliance, a vehicle-mounted wireless UE, a wireless endpoint, a mobile station, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , a USB dongle, a smart device, wireless customer-premises equipment (CPE) , an Internet of Things (loT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device (for example, a remote surgery device) , an industrial device (for example, a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. In the following description, the terms: “UE, ” “communication device, ” “terminal, ” and “UE, ” may be used interchangeably.As used herein, the term “acceptable cell” refers to a cell that satisfies certain conditions, for example, as specified in clause 4.5 in technical specification (TS) 38.304.As used herein, the term “barred cell” refers to a cell that a UE is not allowed to camp on.As used herein, the term “camped on a cell” refers to a case where a UE has completed the cell selection / reselection process and has chosen a cell, and then monitors system information and (in most cases) paging information.As used herein, the term “camped on any cell” refers to a case where a UE is in an idle mode, has completed the cell selection / reselection process, and has chosen a cell irrespective of public land mobile network (PLMN) identity.As used herein, the term “serving cell” refers to a cell on which a UE is camped.As used herein, the term “strongest cell” refers to a cell on a particular frequency that is considered to be strongest according to the layer 1 cell search procedure (for example, as specified in TS 38.213 [4] , and TS 38.215
[0011] ) .As used herein, the term “suitable cell” refers to a cell on which a UE may camp. For anNR cell, the criteria are defined in clause 4.5, for the evolved universal terrestrial radio access (E-UTRA) cell in TS 36.304 [7] .As discussed above, NR Rel-15 supports OD-OSI. A UE may trigger an OD-SI request procedure if the SI is not transmitted to the UE, and the UE needs to acquire the SI. For enhanced network energy saving (NES) , on-demand SIB1 (OD-SIB1) for a UE in an idle / inactive mode has been studied in NR release 19 (Rel-19) as the following agreement:As of now, there are still some open issues regarding the effective design to improve the OD-SI scheme. Therefore, there is a need for an enhanced solution for the OD-SI scheme.Embodiments of the present disclosure provide a solution for the OD-SI. In one aspect of the solution of the present disclosure, a UE transmits, to a first BS or a second BS, a request for SI for an NES cell of the first BS. Moreover, the UE receives the SI from the first BS or the second BS.By allowing the OD-SI, this solution can improve transmission flexibility. In this way, it is possible to improve the efficiency of communications.Principles and implementations of embodiments of the present disclosure will be described in detail below with reference to the figures.FIG. 1A illustrates an example of a wireless communications system (or referred to as a communication network) 100 that supports the OD-SI in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more network entities 102 (also referred to as network equipment) , one or more UEs 104, a core network 106, and a packet data network 108. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a 5G network, such as an NR network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.The one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.A network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112. For example, a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 may be associated with different network entities 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.The one or more UEs 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In some other implementations, a UE 104 may be mobile in the wireless communications system 100.The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1A. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in FIG. 1A. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100.A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) .In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 102 may include one or more of a central unit (CU) , a distributed unit (DU) , a radio unit (RU) , a RAN Intelligent Controller (RIC) (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, or any combination thereof.An RU may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., a layer 3 (L3) , a layer 2 (L2) ) functionality and signaling (e.g., radio resource control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as a layer 1 (L1) (e.g., physical (PHY) layer) or an L2 (e.g., radio link control (RLC) layer, MAC layer) functionality and signaling, and may each be at least partially controlled by the CU.Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more network entities 102 associated with the core network 106.The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application server 118. In some implementations, one or more UEs 104 may communicate with the application server 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server 118 using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the core network 106 (e.g., one or more network functions of the core network 106) .In the wireless communications system 100, the network entities 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the network entities 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the network entities 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.FIG. 1B illustrates another example of a wireless communications system 120 associated with aspects of the present disclosure. Specifically, FIG. 1B illustrates similar entities or functions as shown in FIG. 1A. For example, the details discussed above regarding the network entities 102 and the UE 104 with reference to FIG. 1A applies to FIG. 1B. For the purpose of simplification, the details will be omitted.As shown in FIG. 1B, the wireless communications system 120 may comprise BSs 121 and 122 (also referred to as a first BS 121 and a second BS 122) and a UE 123. For example, the BS 121 and the second BS 122 may be implemented by the network entities 102, and the EU 123 may be implemented by the UE 104.To transmit data and / or control information, the UE 123 may perform communications with the first BS 121 or the second BS 122. The communication between the UE 123 and the first BS 121 or the second BS 122 may be direct or indirect. A link from the first BS 121 or the second BS 122 to the UE 123 is referred to as a downlink (DL) , while a link from the UE 123 to the first BS 121 or the second BS 122 is referred to as an uplink (UL) . The first BS 121 and the second BS 122 may communicate with each other. One or more of the first BS 121, the second BS 122, or the UE 123 may communicate with one or more further devices not shown in FIG. 1B.In some embodiments case 1 for the OD-SIB1 is applied, the UE 123 may transmit a UL wake-up signal (WUS) to the first BS 121 (i.e., to an NES cell of the first BS 121) . In this case, the UE 123 may obtain the WUS configuration from the NES cell. Moreover, the UE 123 may receive the OD-SIB1 from the NES cell. The NES cell may refer to a cell that may perform an SIB1 transmission in response to the UL WUS from the UE 123.In some embodiments case 2 for the OD-SIB1 is applied, the UE 123 may transmit an UL WUS to the first BS 121 (i.e., to an NES cell of the first BS 121) . In this case, the UE 123 may obtain the WUS configuration from the second BS 122 (i.e., from Cell A of the second BS 122) . Moreover, the UE 123 may receive the OD-SIB1 from the NES cell. The Cell A may refer to a cell that periodically transmits at least its own SIB1.In some embodiments case 3 for the OD-SIB1 is applied, the UE 123 may transmit an UL WUS to the second BS 122 (i.e., to Cell A of the second BS 122) . In this case, the UE 123 may obtain the WUS configuration from the Cell A. Moreover, the UE 123 may receive the OD-SIB1 from the Cell A.It is to be understood that the particular number of various communication devices and the particular number of various communication links as shown in FIG. 1B is for illustration purpose only without suggesting any limitations. The communications system 120 may include any suitable number of communication devices and any suitable number of communication links for implementing embodiments of the present disclosure. In addition, it should be appreciated that there may be various wireless as well as wireline communications (if needed) among all of the communication devices.It is to be understood that, the communications in the communications system 120 may follow any suitable communication standards or protocols, which are already in existence or to be developed in the future, for example, as those discussed above with reference to FIG. 1A.FIG. 2 illustrates an example process flow 200 in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the processes 200 will be described with reference to FIG. 1B. It is to be understood that the steps and the order of the steps in FIG. 2 are merely for illustration, and not for limitation. It is to be understood that the process 200 may further include additional blocks not shown and / or omit some shown blocks, and the scope of the present disclosure is not limited in this regard.As shown in FIG. 2, the UE 123 transmits (205) , to the first BS 121, a request for an SI for an NES cell of the first BS 121. In other words, the UE 123 may trigger an SI request procedure (also referred to as, OD-SI request procedure) . Then, the first BS 121 transmits (210) the SI to the UE 123. For example, the SI may comprise an SIB1 and / or one or more other SIBs.In some embodiments, before the request for the SI, the UE 123 may obtain target information associated with the SI, for example, to determine whether to request the SI. The SI may be requested based on the target information. As an example implementation, the target information may comprise version information of an SIB (for example, version information of the SIB1) . As another example implementation, the target information may comprise an SI change indication.For example, the version information may comprise a value tag of the SIB1, and the value tag may be associated with the version of the SIB1. As an example implementation, the value range may be an integer, e.g., 0~31.If the version information (i.e., the current version information, such as the current value tag) of the SIB1 is not identical to the version information (such as the value tag) of the SIB1 stored at the UE 123, the UE 123 may need to trigger an OD-SI request procedure (for example, an OD-SIB1 request procedure) for the NES cell by transmitting the request for SI (for example, the request for the SIB1) for the NES cell to acquire the SIB1 from the NES cell. During the SI request procedure (for example, the SIB1 request procedure) , the UE 123 may transmit a WUS to the NES cell. For example, the WUS may comprise a random access channel (RACH) access preamble, and the UE 123 may transmit the preamble on a RACH resource. Alternatively or additionally, if the UE 123 determines that the SIB1 is broadcasting or present, the UE 123 may acquire the SIB1 without triggering the SIB1 request procedure and store the SIB1. Alternatively or additionally, if the UE 123 receives an SI change indication from the NES cell, the UE 123 may acquire the SIB1 without triggering the SIB1 request procedure and store the SIB1.If the current version information of the SIB1 is identical to the stored version of SIB1, the UE 123 may not need to trigger the OD-SI request procedure (for example, an OD-SIB1 request procedure) for the NES cell, as the UE 123 may consider the stored SIB1 for the NES cell as valid. In this way, it is allowed to avoid triggering the OD-SIB1 request procedure to re-acquire the SIB1 from the NES cell, thus saving signaling overhead. The NES cell supporting the OD-SIB1 request procedure may further support an OD-OSI request procedure.In some implementations, a validity timer may be defined for the SIB1 of the NES cell in place of the version information for the SIB1 of the NES cell. The validity timer for the SIB1 may be different from the validity timer for one or more other SIs. For example, the validity timer for the SIB1 may be configured by the Cell A. For example, the validity timer for the SIB1 may be configured in the WUS configuration for the NES cell. For example, if the validity timer expires, the UE 123 may consider the stored SIB1 for the NES cell as invalid. In this way, it is allowed to avoid triggering the OD-SIB1 request procedure to re-acquire the SIB1 from the NES cell, thus saving signaling overhead.In some implementations, the validity timer may work in combination with the target information. For example, either the timer expires or the version information changes, as the UE 123 may consider the stored SIB1 for the NES cell as invalid. In this way, it is allowed to avoid triggering the OD-SIB1 request procedure to re-acquire the SIB1 from the NES cell if the SIB is considered as valid, thus saving signaling overhead.In some implementations, the first BS 121 may transmit to the UE 123, the version information of the SIB1 for the NES cell. The version information may be indicated in one or more of a periodically broadcast system information block (e.g., MIB) of the NES cell, a physical channel (e.g., PBCH) of the NES cell, or a reference signal (e.g., DMRS) index of the SI (e.g., MIB) of the NES cell. For example, all bits of the version information may be indicated in the SI of the NES cell. As another example, all bits of the version information may be indicated in the physical channel of the NES cell. As a further example, one or more bits of the version information may be indicated in the SI of the NES cell, a physical channel of the NES cell, the reference signal index of the MIB of the NES cell, or any combination of the above-listed items. In this case, the UE 123 may acquire the version information of the SIB1 for the NES cell if the UE 123 chooses the NES cell using a cell re-selection procedure.In some implementations, the second BS 122 may transmit, to the UE 123, the version information of the SIB1 for the NES cell. For example, the second BS 122 may receive the version information of the SIB1 from the first BS 121. The version information (such as value tag) may be indicated in one or more of the following: an SIB1 for a cell (for example, Cell A) of the second BS 122, a further SIB (i.e., another SIB different from the SIB1) for a cell of the second BS 122, an RRC release message from a cell of the second BS 122. In this case, the UE 123 may acquire the version information of the SIB1 for the NES cell before or when the UE 123 chooses the NES cell using a cell re-selection procedure.Alternatively or additionally, the second BS 122 may indicate a plurality of version information of the SIB1 for a plurality of NES cells including the NES cell. As an example implementation, the value tag of SIB1 may be indicated per NES cell. For example, the second device 122 may indicate a list of value tags of SIB1 for a set of NES cells, as follows:As an example implementation, if the version information of the SIB1 for the NES cell changes, the second device 122 may cause a paging transmission (such as a short message transmission on a PDCCH) in the Cell A of the second BS 122.In some implementations, instead of indicating the version information of the SIB1, the second BS 122 may transmit the SI change indication via paging to the UE 123 if the version of the SIB1 of the NES cell changes. For example, the second BS 122 may obtain the version information change of the SIB1 from the first BS 121. The SI change indication may be associated with the SIB1 for the NES cell. In other words, the SI change indication may be specific for the SIB1 for the NES cell. The SI change indication may be indicated in one or more of the following: an RRC release message from a cell of the second BS 122, or a short message on a PDCCH from a cell of the second BS 122. For example, if there are multiple version information changes for multiple NES cells, the SI change indication per cell may be indicated in an RRC paging message, or the SI change indication per cell may be indicated in a short message on PDCCH using a paging-radio network temporary identifier (P-RNTI) . In this case, the UE 123 may store the SI change indication. If the UE 123 chooses the NES cell using a cell re-selection procedure and determines that the SI change indication has been received, it may trigger the SIB1 request procedure (for example, the SI request procedure) to acquire the SIB1.In some implementations, to avoid multiple rounds of OD-SI request procedures, the UE 123 may request the SIB1 and one or more other SIBs via a single SI request procedure from the NES cell for efficiency. In this case, the request for the SI may request the SIB1 and the one or more other SIBs. For example, the UE may trigger the single procedure for at least one of the SIB1 and the one or more SIB if both the SIB1 and the one or more SIBs are determined as invalid based on at least one of: the validity timers for the SIB1 and the one or more SIBs and the value tags of SIB1 and the one or more SIBs. For example, if the UE 123 acquires the value tag of each of the SIB1 and the one or more SIBs of the NES cell from the second BS 122, and if the UE 123 chooses the NES cell using a cell re-selection procedure, the UE 123 may trigger the single SI request procedure for at least one of the SIB1 and the one or more SIBs based on the acquires value tags of the SIB1 and the one or more SIBs and stored value tags of the SIB1 and the one or more SIBs.As an example implementation, the UE may acquire value tags of the SIB1 and the SIB2 of the NES cell from the second BS 122, and after the UE 123 chooses the NES cell using a cell re-selection procedure, it may trigger the SIB request procedure to acquire the SIB1 and SIB2 if both value tags of the SIB1 and SIB2 are not identical to those stored versions of the SIB1 and SIB2. Alternatively or additionally, if the value tag of the SIB1 is identical to the stored version of the SIB1, and the value tag of the SIB2 is not identical to the stored version of the SIB2, the UE 123 may not request the SIB1 but request the SIB2. FIG. 3 illustrates an example process flow 300 in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the processes 300 will be described with reference to FIG. 1B. It is to be understood that the steps and the order of the steps in FIG. 3 are merely for illustration, and not for limitation. It is to be understood that the process 300 may further include additional blocks not shown and / or omit some shown blocks, and the scope of the present disclosure is not limited in this regard.As shown in FIG. 3, the UE 123 transmits (305) , to the second BS 122, a request for an SI for an NES cell of the first BS 121. In other words, the UE 123 may trigger an SI request procedure (also referred to as, an OD-SI request procedure) . Then, the second BS 122 transmits (310) the SI to the UE 123. For example, the SI may comprise an SIB1 and / or one or more other SIBs. Alternatively or additionally, the SI may comprise one or more information contained in the MIB for the NES cell, which will be discussed later.In some embodiments, before the request for the SI, the UE 123 may obtain, from the second BS 122, target information associated with the SI, for example, to determine whether to request the SI. The SI may be requested based on the target information. As an example implementation, the target information may comprise version information of an SIB (for example, version information of the SIB1) .In some implementations, the second BS 122 may transmit, to the UE 123, the version information of the SIB1 for the NES cell. For example, the second BS 122 may receive the version information of the SIB1 and the SIB1 from the first BS 121. If the version information (i.e., the current version information, such as the current value tag) of the SIB1 is not identical to the version information (such as the value tag) of the SIB1 stored at the UE 123, the UE 123 may need to trigger an OD-SI request procedure (for example, an OD-SIB1 request procedure) for the NES cell by transmitting the request for SI (for example, the request for the SIB1) for the NES cell to the second BS 122 to acquire the SIB1 for the NES cell from the BS 122. During the SI request procedure (for example, the SIB1 request procedure) , the UE 123 may transmit a WUS to the second BS 122. For example, the WUS may comprise a random access channel (RACH) access preamble, and the UE 123 may transmit the preamble on a RACH resource.If the current version information of the SIB1 is identical to the stored version of SIB1, the UE 123 may not need to trigger the OD-SI request procedure (for example, an OD-SIB1 request procedure) for the NES cell, as the UE 123 may consider the stored SIB1 for the NES cell as valid. In this way, it is allowed to avoid triggering the OD-SIB1 request procedure to re-acquire the SIB1 from the NES cell, thus saving signaling overhead.More details regarding the version information as discussed above with reference to FIG. 2 can also apply, and for the purpose of simplification, the details will be omitted.In some implementations, the second BS 122 may transmit, to the UE 123, the validity timer of the SIB1 for the NES cell. For example, the validity timer of the SIB1 of the NES cell may be configured per NES cell. For example, the validity timer for SIB1 may be configured in the WUS configuration for the NES cell. For example, the second BS 122 may acquire the validity timer for the SIB1 of the NES cell from the first BS 121.In some implementations, instead of indicating the version information of the SIB1, the target information may comprise an SI change indication. In this case, the second BS 122 may transmit the SI change indication via paging to the UE 123 if the version of the SIB1 of the NES cell changes. For example, the second BS 122 may obtain the version information change of the SIB1 from the first BS 121. More details regarding the SI change indication as discussed above with reference to FIG. 2 can also apply, and for the purpose of simplification, the details will be omitted.In some implementations, after the UE 123 receives the SIB1 from the BS 122, the NES cell may still need to transmit other SI (s) to the UE 123 after UE camps on the NES cell. To avoid the SI request for OSI from the NES cell, the UE 123 may request the SIB1 and one or more other SIBs via a single SI request procedure from the BS 122 for efficiency. In this case, the request for the SI may request the SIB1 and the one or more other SIBs. For example, if the UE 123 acquires the value tag of each of the SIB1 and the one or more SIBs of the NES cell from the second BS 122, and if the UE 123 chooses the NES cell using a cell re-selection procedure, the UE 123 may trigger the single SI request procedure for at least one of the SIB1 and the one or more SIBs based on the acquires value tags of the SIB1 and the one or more SIBs and stored value tags of the SIB1 and the one or more SIBs.Reference is made to FIG. 4 to discuss an example OD-SI request procedure 400 for multiple SIBs. As shown in FIG. 4, the first BS 121 transmits (405) , to the second BS 122, the SIB1 for the NES cell, the value tag of the SIB1, one or more other SIBs for the NES cell (for example, simply denoted by SIBx) , and one or more other value tags of the one or more other SIBs (for example, simply denoted by value tag of the SIBx ) .The second BS 122 transmits (410) , to the UE 123, the OD-SI configuration (also referred to as SI request configuration) for the NES cell (s) . The OD-SI configuration may be used for requesting the SI for the NES cell (s) . The OD-SI configuration may indicate which NES cell (s) is on-demand in the Cell A of the second BS 122. If the Cell A supports the Msg1 based SI request, the OD-SI configuration may indicate a dedicated RACH resource e.g., RACH Access preamble and RA occasion, used for the SI request. If the Cell A supports the Msg3 based SI request, the dedicated RACH resource may not be needed. For example, an example OD-SI configuration may be as follows:Then, the second BS 122 transmits (415) the value tag of the SIB1 for the NES cell to the UE 123, and transmits (410) one or more value tags of the one or more other SIBs (for example, simply denoted as the value tag of the SIBx) for the NES cell to the UE 123.After receiving the value tag of the SIB1 for the NES cell, and the one or more value tags of the one or more other SIBs for the NES cell from the BS 122, the UE 123 determines there is a need to trigger the SI request for the NES cell, and then triggers (425) the SI request for the NES cell. For example, when the UE 123 chooses the NES cell based on a cell reselection procedure according to the radio condition of the NES cell, it needs to trigger the SI request for the NES cell if the value tag of the SIB1 or the one or more other SIBs changes.Then, the UE 123 transmits (430) a request for the SI (for example, the SIB1 and the one or more other SIBs (simply denoted as the SIB1 and the SIBx) ) to the second BS 122, and receives (435) the requested SI from the second BS 122.In some embodiments, the UE 123 may request the whole SI per NES cell.In the example embodiments where the Cell A supports the Msg1 based SI request and the SI request procedure is performed based on 4 step RACH procedure, the UE 123 may select an RA resource and transmit an Msg1 (e.g., an RA preamble) on an RA occasion to the Cell A, and then receive an Msg2 including an UL grant from the Cell A. Moreover, the UE 123 may transmit an Msg3 including information to indicate which NES cell (s) to request on the UL resource, and then receive an Msg4. The UE 123 may determine the SI request is transmitted successfully based on the Msg4.In some implementations, after the UE 123 UE determines the SI request is successfully received by the Cell A, the UE 123 may receive the SI for the NES in a configured time window (i.e., a configured SI window) , also referred to as a first time window. The first time window may be identified or determined in a variety of approaches.As an example, the first window may be different from an SI window (also referred to as a second time window) used for transmitting SI of the cell A. In other words, the position of the first window is different from that of the second time window used for the Cell A to schedule its own SIB (s) the of Cell A. The first time window may be associated with the NES cell. In this case, the window position may be configured per NES cell. For example, an SI window of a NES cell may not be overlapped with an SI window of another NES cell.As another example, a PDCCH scheduling the SI may be identified by an identifier associated with the NES cell. For example, the UE 123 may receive the PDCCH identified by an SI-radio network temporary identifier (SI-RNTI) . The SI-RNTI may be configured per NES cell. The SI-RNTI of the NES cell may be different from the SI-RNTI of the Cell A and may used to identify the NES cell if the first time window is overlapped with the second window of the Cell A. For example, one or more SIB types may be mapped to the first time window. Each SI window (such as the first time window) may be configured with a transmission periodicity. The SIB type (s) mapped to an SI window of an NES cell (such as the first time window) may need to be indicated whether it is broadcasting or not, which may be configured per NES cell, for example, if the SI window of the NES cell is overlapped with an SI window of another NES cell.As a further example, a search space or ControlResourceSet (CORESET) of a PDCCH scheduling the SI may be associated with the NES cell. In this case, for example, the search space or CORESET of the PDCCH scheduling the SI for the NES cell may be configured separately from that for the Cell A. The search space or CORESET of the PDCCH scheduling the SI for the NES cell may be different from that for the Cell A and thus may be used to identify the NES cell if the first time window for the NES cell is overlapped with the second window for the Cell A. The search space or CORESET of the PDCCH scheduling the SI may be configured per NES cell, for example, if an SI window of an NES cell is overlapped with an SI window of another NES cell.As yet a further example, the SI or the target information or may be transmitted to the UE 123 together with information (also referred to as NES cell information) for identifying the NES cell. For example, an SIB for an NES cell may be transmitted together with the NES cell information. The NES cell information may comprise the NES cell type or cell identification. In this way, it is allowed to avoid the impact of downlink control information (DCI) on the PDCCH.As still a further example, a PDCCH scheduling the SI or the target information may comprise information for identifying the NES cell. The PDCCH may indicate the NES cell information of the scheduled SI, to identify the NES cell if the first time window for the NES cell is overlapped with the second time window for the Cell A. Further, the PDCCH may indicate which NES cell the scheduled SI is for if more than one NES cell is scheduled. As an embodiment, the PDCCH may indicate which SIB type the scheduling SI has. The UE 123 may acquire the above configuration about one or more of the PDCCH, the SI-RNTI, or the SI window from the second BS 202, for example, via an SIB of the Cell A.In some implementations, after the UE 123 UE determines the SI request is successfully transmitted to the Cell A, the UE 123 may start a timer, and the UE 123 may receive the SI for the NES cell when the timer is running. For example, the UE 123 may monitor the PDCCH identified by an RNTI. The RNTI may be allocated in the Msg2. The PDCCH or the scheduled SIB may indicate the NES cell information for identifying that the scheduled SI is for (i.e., associated with) the NES cell. The NES cell information may be implicitly indicated by the search space or CORESET of the PDCCH scheduling the SI.In some embodiments, rather than the whole SI, the UE 123 may request one or more SIBs of the NES cell.In some implementations, the UE 123 may transmit an Msg3 including information to indicate which NES cell (s) and which SIB (s) to request. For example, for an NES cell, the UE 123 may determine which one or more SIBs for the NES cell need to be requested based on at least one of : validity timer for the one or more SIBs or version information of the one or more SIBs. As an example implementation, the UE 123 may determine to request an SIB if the received value tag (i.e., the current value tag) of the SIB is not identical to the stored value tag of the SIB.As an example implementation, the UE 123 may request the SIB1 for the NES cell and one or more other SIs for the NES cell via multiple request procedures. For example, if it is determined that both the SIB1 and the SIB2 are invalid, the UE 123 may first request the SIB1 to the second BS 122 and receive the SIB1 from the second BS 122, and then request the SIB2 to the second BS 122 and receive the SIB2 from the second BS 122. As another example, if it is determined that the SIB1 is valid and the SIB2 is invalid, the UE 123 may request the SIB2 to the second BS 122 and receive the SIB2 from the second BS 122.As another example implementation, the UE 123 may request the SIB1 for the NES cell and one or more other SIs for the NES cell via one request procedure. For example, if the SIB1 and the SIB2 are invalid, the UE 123 may request the SIB1 and the SIB2 in one request message of the request procedure, and the BS may transmit the SIB1 and the SIB2 to the UE 123.In the example embodiments where the Cell A supports the Msg1 based SI request, the UE 123 may select an RA resource associated with the NES cell and transmit Msg1 (e.g., an RA preamble) on an RA occasion to the Cell A, and receive Msg2 including a random access preamble identifier (RAPID) from the Cell A. If the UE 123 determines that the SI request is successfully received by the Cell A, it may receive the SI for the NES in a configured window. The configured window may be configured in an SIB from the Cell A.In some embodiments, the UE 123 may request, from the second BS 122, one or more information contained in the MIB for the NES cell. For example, in addition to the SIB1 and OSI for the NES cell, the UE 123 may request one or more information contained in the MIB for the NES cell, from the second BS 122. As an example implementation, this information can be transmitted if the UE 123 only requests the SIB1. For example, in response to a request for the SIB1 from the UE 123, the second BS 122 may transmit this information and the SIB1 to the UE 123. In other words, the SIB1 and partial MIB may be requested in the single request procedure. As another example implementation, this information may be requested separately from the SIB1. For example, the UE 123 may request this information before requesting the SIB1. In this case, the NES cell may avoid the transmission of such information to save the signaling overhead of the NES cell.For example, the requested information contained in the MIB may comprise one or more of the following: information (for example, also referred to as cellBarred) on cell status information of one or more barred cells, information (for example, also referred to as intraFreqReselection) on whether an intra frequency cell is allowed to be re-selected by the UE 123, information (for example, also referred to as subCarrierSpacingCommon) on a subcarrier spacing, information (for example, also referred to as ssb-SubcarrierOffset) on a frequency domain offset between an SSB and an overall resource block grid in a number of subcarriers, information (for example, also referred to as dmrs-TypeA-Position) on a position of a DMRS, or information (for example, also referred to as pdcch-ConfigSIB1) on a CORESET or a common search space of PDCCH.For example, more details of the meaning regarding the above parameter fields may be shown as follows:For example, wherein the information on cell status information of one or more barred cells may be at least 2 fields about the cellBarred status, where the first field of the 2 fields indicates the cellBarred status for a UE not supporting camping at NES cell, and the second field of the 2 fields indicates the cellBarred status for UE supporting camping at NES cell. If the UE 123 supporting camping at the NES cell acquires the second field of the cellBarred status of a target NES cell, it may avoid choosing the target NES cell for cell reselection. If a UE not supporting camping at the NES cell acquires the first field of the cellBarred status of a target NES cell, it may avoid choosing the target NES cell for cell reselection.For example, the information on a CORESET or a common search space of PDCCH may be related to the configuration about PDCCH scheduling at least one of: Random Access Response, paging, short message, or SIB1.For example, if the UE 123 acquires at least one of the cellBarred status of a target NES cell, it may avoid choosing the target NES cell for cell reselection. As another example, if the UE 123 acquires the intraFreqReselection set to ‘not allowed’ , and PLMN, SIB1 of a target NES cell, the UE 123 may avoid choosing the intra-frequency cell for cell reselection. For example, the UE 123 may or may not support camping at a NES cell.In some embodiments, if there are multiple NES cells that fulfill the intra-frequency cell reselection criteria or equal priority inter-frequency cell reselection criteria, the UE 123 may choose more than one NES cell as the target cells to trigger the SI request procedure. In some implementations, the cell reselection parameter (s) used for choosing the target cells may be configured separately from the legacy cell reselection parameter (s) . As an example, the target cells may be determined based on ranking level information of the multiple NES cells. As an example implementation, the UE 123 may select the top N-ranking NES cells based on the R criteria. The value of N may be received from the second BS 123, or be determined by the UE 123 itself (i.e., up to the implementation of the UE 123) .For example, the top N-ranking NES cells may be requested in one SI request procedure. In this case, the request for the SI for the NES cell may further request one or more SIs for one or more further NES cells of the top N-ranking NES cells, and the SI for the NES cell and the one or more SIs for the one or more further NES cells may be transmitted to the UE 123 together or respectively. In an embodiment, the UE may transmit an Msg3 including information indicating that there is more than one NES cell to request on the UL resource, and then receive the Msg4.As another example, the top N-ranking NES cells may be requested in multiple SI request procedures respectively. In other words, the UE 123 may multiple requests for multiple SIs for the top N-ranking NES cells, and then receive the multiple SIs for the top N-ranking NES cells respectively. The UE 123 may request SI for each of the top N-ranking NES cells from the second BS 122 in the order of the ranking level information of the top N-ranking NES cells. For example, the UE 123 may first request the SI for the cell with the highest ranking level, then request the SI for the cell with the next ranking level, etc.According to above embodiments, in the scenario where a UE has acquired the OD-SIB1 for the NES cell and moves away from the NES cell, and then further tries to camp on the NES cell, instead of always triggering the OD-SIB1 procedure when camping on the NES cell to avoid that the SIB1 is invalid, the proposed solution for the version information based OD-SIB1 procedure can reduce the signaling overhead, and thus improve the flexibility and efficiency of communications.In some embodiments, the SI transmitted by the second BS 122 to the UE 123 may comprise at least one of the first cell related information for cell re-selection or second cell related information for cell re-selection. The first cell related information may comprise the first excluded-listed cell related information (for example, legacy set of excluded cells related information) for cell reselection e.g., for a legacy UE not supporting camping at an NES cell, and the second cell related information may comprise the second excluded-listed cell related information (for example, an additional set of exclude cells related information) for cell reselection e.g., for an NES UE (for example, the UE 123) supporting camping at an NES cell. In this way, it is allowed to avoid the legacy UE camping at the Cell A attempting to switch to the NES Cell, but allowing the R19 NES UE to do that. In this case, the UE 123 may not use the legacy set of excluded cells for cell re-selection but use the additional set of excluded cells for cell re-selection.As an example implementation, the first cell related information may be named intraFreqExcludedCellList, and the second cell related information may be named AdditionalIntraFreqExcludedCellList. The first cell related information and the second cell related information may be indicated as follows:IntraFreqExcludedCellList : : = SEQUENCE (SIZE (1.. maxCellExcluded) ) OF PCI-RangeAdditionalIntraFreqExcludedCellList : : = SEQUENCE (SIZE(1.. maxCellExcluded) ) OF PCI-RangeAs an example implementation, the first cell related information may be named intraFreqExcludedCellList, and the second cell related information may be named AdditionalIntraFreqExcludedCellList. The first cell related information and the second cell related information may be indicated as follows:IntraFreqExcludedCellList : : = SEQUENCE (SIZE (1.. maxCellExcluded) ) OF PCI-RangeAdditionalIntraFreqExcludedCellList : : = SEQUENCE (SIZE(1.. maxCellExcluded) ) OF StatusA status value (for example, a bit) in the AdditionalIntraFreqExcludedCellList information element (IE) may correspond to a cell in the intraFreqExcludedCellList IE. The status value may indicate whether a corresponding cell in the intraFreqExcludedCellList is excluded as a candidate cell for cell reselection for the NES UE. The status values in the AdditionalIntraFreqExcludedCellList may correspond to (i.e., associated with) cells in the intraFreqExcludedCellList respectively. The status value based status indication has less cost compared to PCI-Range.In some implementations, the second BS 123 may transmit the first cell related information. The first cell related information may indicate one or more neighboring cells (i.e., one or more cells to be excluded) for intra-frequency or inter-frequency cell re-selection for the legacy UE. For example, the cell indicated in the first cell related information may not have an NES cell type, e.g., not support the OD-SIB1. Accordingly, the legacy UE may receive the first cell related information, and may not consider any cell indicated in the first cell related information as a candidate cell for cell reselection. The legacy UE may not support the OD-SIB1 for the NES cell.In some implementations, the second BS 123 may transmit the second cell related information for cell re-selection. The second cell related information may indicate one or more neighboring cells (i.e., one or more cells to be excluded) for cell re-selection e.g., for the NES UE (such as the UE 123) . The UE 123 may receive the second cell related information, and may not consider any cell indicated in the second cell related information as a candidate for cell reselection. In other words, the UE 123 may consider a cell not included in the second cell related information as a candidate cell for cell selection. The UE 123 may ignore the first cell related information if it receives first cell related information.For example, if a target cell as an NES cell is not allowed to be camped on for a legacy UE, it is indicated as one indicated in the first cell related information, for example, in an SIB (e.g., SIB3, SIB4, or SIB5) . Then, the legacy UE may not consider the target cell as a candidate for cell reselection. While the target cell may not be indicated as one indicated in the second cell related information, and thus the UE 123 may consider the target cell as a candidate for cell reselection. In this case, the UE 123 may determine the excluded cell (s) for cell reselection, based on the second cell related information, rather than the first cell related information.In some embodiments, the SI transmitted by the second BS 122 to the UE 123 may comprise at least one of the third cell related information for cell re-selection or fourth cell related information for cell re-selection. The third cell related information may be used for the legacy UE for cell re-selection, and the fourth cell related information may be used for the NES UE (such as the UE 123) for cell re-selection. In this case, it is allowed to avoid the legacy UE camping at the Cell A attempting to switch to the NES Cell, but allowing the R19 NES UE to do that.As an example implementation, the third cell related information may be named as intraFreqExcludedCellList, and the fourth cell related information may be named as AdditionalIntraFreqExcludedCellList. The third cell related information and the fourth cell related information may be indicated as follows:In some implementations, the second BS 123 may transmit the third cell related information for cell re-selection. The third cell related information may indicate one or more neighbouring cells for intra-frequency or inter-frequency cell re-selection for the legacy UE. For example, the cell indicated in the third cell related information may not have an NES cell type, e.g., not support the OD-SIB1. Accordingly, the legacy UE may receive the third cell related information; and may consider cell re-selection parameters of a cell indicated in the third cell related information during cell re-selection. The legacy UE may not support the OD-SIB1 for the NES cell.In some implementations, the second BS 123 may transmit the fourth cell related information for cell re-selection. The fourth cell related information may indicate one or more neighboring cells for cell re-selection for the NES UE (such as the UE 123) . For example, the cell indicated in the fourth cell related information may have an NES cell type, e.g., support the OD-SIB1. The UE 123 may receive the fourth cell related information, and may consider the cell re-selection parameters of a cell indicated in the fourth cell related information as a candidate for cell reselection.For example, the UE 123 may receive the third cell related information and the fourth cell related information. In this case, the UE 123 may consider cell re-selection parameters during cell reselection. The UE 123 may consider cell re-selection parameters of a cell indicated in the fourth cell related information during cell reselection.As an example implementation, the cell re-selection parameters may include at least one of the following: cell ID, q-OffsetCell, q-RxLevMinOffsetCell, q-QualMinOffsetCell, as follows.For example, if a target cell as an NES cell is not allowed to be camp on for the legacy UE, the cell re-selection parameters of the target may be separately indicated in the third cell related information and the fourth cell related information, for example, in an SIB (e.g., SIB3, SIB4, or SIB5) . The legacy UE may use the cell re-selection parameters of a cell indicated in the third cell related information for cell reselection, and an NES UE (for example, the UE 123) may use the cell re-selection parameters of a cell indicated in the fourth cell related information for cell reselection.In some embodiments, to avoid the UE 123 camping on the Cell A and having not acquired the UL WUS configuration of the NES cell attempting to switch to the NES cell, the UE 123 may not consider the NES cell as a candidate for cell reselection before acquiring UL WUS config of the NES cell. After the UE 123 has acquired the valid UL WUS configuration of the NES cell, the UE 123 may consider the NES cell as a candidate for cell reselection. If the UE 123 considers the NES cell as a candidate for cell reselection, the UE 123 may attempt to switch to the NES Cell for the SIB1 request, e.g., if a cell reselection criterion is met.Reference is made to FIG. 5 to discuss a further example wireless communications system associated with aspects of the present disclosure. As shown in FIG. 5, the wireless communications system involves Cell A on which the UE is camping, and the NES cell 1 and wireless communications system NES cell 2 on which the UE will camp.If the NES cell1 needs to update the SI, it shall transmit an SI change indication and transmits the updated SI. In an example embodiment where the above case 2 for the OD-SIB1 is applied, all UEs camped on the NES cell1 may move to the NES cell2, however, the NES cell may not be aware of this fact. Therefore, the NES cell should not transmit the SI change indication and the updated SI. In this case, to avoid unnecessary power consuming due to transmitting the SI change indication and the updated SI, the following embodiments may need to be considered.If the UE moves to the NES Cell1, the UE may inform the NES Cell1 that it is camping on the NES Cell1. For example, during the SIB1 request procedure, the UE may transmit an Msg 1 including a preamble to the NES Cell 1 and receive an Msg2. Then, the UE transmits an Msg3 indicating the UE ID to the NES Cell 1. The UE ID may be unique in an area, e.g., a tracking area or a PLMN.If the UE moves to the NES Cell2, the UE may inform the NES Cell2 that it came from the NES Cell1. For example, during the SIB1 request procedure, the UE may transmit the cell information (e.g., the cell ID of the NES cell1) to the NES cell2.Then, the NES Cell2 may notify NES cell1 that a UE is away from the NES cell1. For example, the RAN node of the NES cell2 may transmit an indication to the RAN node of the NES cell1 via the interface between these two RAN nodes, that a UE is not camping on the NES cell1. Accordingly, the NES cell1 may determine a UE is not camping on it based on the notification from the NES cell2.If the SI change frequency of the NES cell is higher than the cell reselection to the NES cell, it may have energy saving gain.Alternatively or additionally, if the UE powers off in the NES cell1, the UE may inform the NES cell1 it is not camping on the NES cell1 before it powers off.FIG. 6 illustrates an example of a device 600 that supports the OD-SI in accordance with aspects of the present disclosure. The device 600 may be an example of a first BS 121, a second BS 122, or a UE 123 as described herein. The device 600 may support wireless communication with one or more devices in the A-IoT system. The device 600 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 602, a memory 604, a transceiver 606, and, optionally, an I / O controller 608. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .The processor 602, the memory 604, the transceiver 606, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 602, the memory 604, the transceiver 606, or various combinations or components thereof may support a method for performing one or more of the operations described herein.In some implementations, the processor 602, the memory 604, the transceiver 606, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 602 and the memory 604 coupled with the processor 602 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 602, instructions stored in the memory 604) .For example, the processor 602 may support wireless communication at the device 600 in accordance with examples as disclosed herein. The processor 602 may be configured to operable to support a means for receiving, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of the first BS; and a means for transmitting the SI to the UE. The processor 602 may be configured to operable to support a means for receiving, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of a first BS; and a means for transmitting the SI to the UE. The processor 602 may be configured to operable to support a means for transmitting, to a first base station (BS) or a second BS, a request for system information (SI) for a network energy saving (NES) cell of the first BS; and a means for receiving the SI from the first BS or the second BSThe processor 602 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some implementations, the processor 602 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 602. The processor 602 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 604) to cause the device 600 to perform various functions of the present disclosure.The memory 604 may include random access memory (RAM) and read-only memory (ROM) . The memory 604 may store computer-readable, computer-executable code including instructions that, when executed by the processor 602 cause the device 600 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 602 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 604 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.The I / O controller 608 may manage input and output signals for the device 600. The I / O controller 608 may also manage peripherals not integrated into the device M02. In some implementations, the I / O controller 608 may represent a physical connection or port to an external peripheral. In some implementations, the I / O controller 608 may utilize an operating system such asor another known operating system. In some implementations, the I / O controller 608 may be implemented as part of a processor, such as the processor 602. In some implementations, a user may interact with the device 600 via the I / O controller 608 or via hardware components controlled by the I / O controller 608.In some implementations, the device 600 may include a single antenna 610. However, in some other implementations, the device 600 may have more than one antenna 610 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 606 may communicate bi-directionally, via the one or more antennas 610, wired, or wireless links as described herein. For example, the transceiver 606 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 606 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 610 for transmission, and to demodulate packets received from the one or more antennas 610. The transceiver 606 may include one or more transmit chains, one or more receive chains, or a combination thereof.A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 610 for transmitting the amplified signal into the air or wireless medium.A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 610 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.FIG. 7 illustrates an example of a processor 700 that supports the OD-SI in accordance with aspects of the present disclosure. The processor 700 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 700 may include a controller 702 configured to perform various operations in accordance with examples as described herein. The processor 700 may optionally include at least one memory 704, such as L1 / L2 / L3 cache. Additionally, or alternatively, the processor 700 may optionally include one or more arithmetic-logic units (ALUs) 706. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .The processor 700 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 700) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .The controller 702 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 700 to cause the processor 700 to support various operations in accordance with examples as described herein. For example, the controller 702 may operate as a control unit of the processor 700, generating control signals that manage the operation of various components of the processor 700. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.The controller 702 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 704 and determine subsequent instruction (s) to be executed to cause the processor 700 to support various operations in accordance with examples as described herein. The controller 702 may be configured to track memory address of instructions associated with the memory 704. The controller 702 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 702 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 700 to cause the processor 700 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 702 may be configured to manage flow of data within the processor 700. The controller 702 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 700.The memory 704 may include one or more caches (e.g., memory local to or included in the processor 700 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementations, the memory 704 may reside within or on a processor chipset (e.g., local to the processor 700) . In some other implementations, the memory 704 may reside external to the processor chipset (e.g., remote to the processor 700) .The memory 704 may store computer-readable, computer-executable code including instructions that, when executed by the processor 700, cause the processor 700 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 702 and / or the processor 700 may be configured to execute computer-readable instructions stored in the memory 704 to cause the processor 700 to perform various functions. For example, the processor 700 and / or the controller 702 may be coupled with or to the memory 704, and the processor 700, the controller 702, and the memory 704 may be configured to perform various functions described herein. In some examples, the processor 700 may include multiple processors and the memory 704 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.The one or more ALUs 706 may be configured to support various operations in accordance with examples as described herein. In some implementations, the one or more ALUs 706 may reside within or on a processor chipset (e.g., the processor 700) . In some other implementations, the one or more ALUs 706 may reside external to the processor chipset (e.g., the processor 700) . One or more ALUs 706 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 706 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 706 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 706 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 706 to handle conditional operations, comparisons, and bitwise operations.The processor 700 may support wireless communication in accordance with examples as disclosed herein. The processor 700 may be configured to or operable to support a means for receiving, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of the first BS; and a means for transmitting the SI to the UE. The processor 700 may be configured to or operable to support a means for receiving, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of a first BS; and a means for transmitting the SI to the UE. The processor 700 may be configured to or operable to support a means for transmitting, to a first base station (BS) or a second BS, a request for system information (SI) for a network energy saving (NES) cell of the first BS; and a means for receiving the SI from the first BS or the second BS.FIG. 8 illustrates a flowchart of a method 800 that supports the OD-SI in accordance with aspects of the present disclosure. The operations of the method 800 may be implemented by a device or its components as described herein. For example, the operations of the method 800 may be performed by a first BS 121 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.At 810, the method may include receiving, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of the first BS. The operations of 810 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 810 may be performed by a first bs 121 as described with reference to FIG. 1B.At 820, the method may include transmitting the SI to the UE. The operations of 820 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 820 may be performed by a first BS 121 as described with reference to FIG. 1B.FIG. 9 illustrates a flowchart of a method 900 that supports the OD-SI in accordance with aspects of the present disclosure. The operations of the method 900 may be implemented by a device or its components as described herein. For example, the operations of the method 900 may be performed by a second BS 122 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.At 910, the method may include receiving, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of a first BS. The operations of 910 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 910 may be performed by a second BS 122 as described with reference to FIG. 1B.At 920, the method may include transmitting the SI to the UE. The operations of 920 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 920 may be performed by a second BS 122 as described with reference to FIG. 1B.FIG. 10 illustrates a flowchart of a method 1000 that supports the OD-SI in accordance with aspects of the present disclosure. The operations of the method 1000 may be implemented by a device or its components as described herein. For example, the operations of the method 1000 may be performed by a UE 123 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.At 1010, the method may include transmitting, to a first base station (BS) or a second BS, a request for system information (SI) for a network energy saving (NES) cell of the first BS. The operations of 1010 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1010 may be performed by a UE 123 as described with reference to FIG. 1B.At 1020, the method may include receiving the SI from the first BS or the second BS. The operations of 1020 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1020 may be performed by a UE 123 as described with reference to FIG. 1B.It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.As used herein, including in the claims, an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A first base station (BS) comprising:at least one memory; andat least one processor coupled with the at least one memory and configured to cause the first device to:receive, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of the first BS; andtransmit the SI to the UE.2.The first BS of claim 1, wherein the at least one processor is further configured to cause the first BS to:transmit target information associated with the SI to the UE.3.The first BS of claim 2, wherein the target information comprises version information of a system information block 1 (SIB1) .4.The first BS of claim 3, wherein the version information is indicated in one or more of the following:a master information block (MIB) of the NES cell;a physical broadcast channel (PBCH) of the NES cell; ora demodulation reference signal (DMRS) index of the MIB of the NES cell.5.A second base station (BS) comprising:at least one memory; andat least one processor coupled with the at least one memory and configured to cause the first device to:receive, from a user equipment (UE) , a request for system information (SI) for a network energy saving (NES) cell of a first BS; andtransmit the SI to the UE.6.The second BS of claim 5, wherein the at least one processor is further configured to cause the second BS to:transmit target information associated with the SI to the UE.7.The second BS of claim 6, wherein the target information comprises version information of a system information block 1 (SIB1) for the NES cell.8.The second BS of claim 7, wherein the version information is indicated in one or more of the following:a SIB1 for a cell of the second BS;a further system information block (SIB) for a cell of the second BS; ora radio resource control (RRC) release message from a cell of the second BS.9.The second BS of claim 7, wherein the at least one processor is further configured to cause the second BS to:receive the version information from the first BS.10.The second BS of claim 5, wherein the SI comprises one or more of the following:information on one or more barred cells;information on whether an intra frequency cell is allowed to be re-selected by the UE;information on a subcarrier spacing;information on a frequency domain offset between a synchronization signal block (SSB) and an overall resource block grid in a number of subcarriers;information on a position of a demodulation reference signal (DMRS) ; orinformation on a common ControlResourceSet (CORESET) or a common search space of a PDCCH.11.The second BS of claim 5, wherein the SI comprises at least one of first cell related information for cell re-selection or second cell related information for cell re-selection, andwherein the first cell related information indicates one or more cells to be excluded for cell reselection for a UE not supporting camping at an NES cell, and the second cell related information indciates one or more cells to be excluded for cell reselection for a UE supporting camping at an NES cell.12.A user equipment (UE) comprising:at least one memory; andat least one processor coupled with the at least one memory and configured to cause the UE to:transmit, to a first base station (BS) or a second BS, a request for system information (SI) for a network energy saving (NES) cell of the first BS; andreceive the SI from the first BS or the second BS.13.The UE of claim 12, wherein the at least one processor is further configured to cause the UE to:receive target information associated with the SI from the first BS or the second BS.14.The UE of claim 13, wherein the SI is requested based on the target information.15.The UE of claim 13, wherein the target information comprises version information of a system information block 1 (SIB1) .16.The UE of claim 12, wherein the SI is received from the second BS, and the SI comprises one or more of the following:information on one or more barred cells;information on whether an intra frequency cell is allowed to be re-selected by the UE;information on a subcarrier spacing;information on a frequency domain offset between a synchronization signal block (SSB) and an overall resource block grid in a number of subcarriers;information on a position of a demodulation reference signal (DMRS) ; orinformation on a common ControlResourceSet (CORESET) or a common search space ofa PDCCH.17.The UE of claim 12, wherein the SI comprises at least one of first cell related information for cell re-selection or second cell related information for cell re-selection, andwherein the first cell related information indicates one or more cells to be excluded for cell reselection for a UE not supporting camping at an NES cell, and the second cell related information indciates one or more cells to be excluded for cell reselection for a UE supporting camping at an NES cell.18.The UE of claim 17, wherein the at least one processor is further configured to cause the UE to:ignore the first cell related information.19.The UE of claim 17, wherein the at least one processor is further configured to cause the UE to:consider a cell not included in the second cell related information as a candidate cell for cell selection.20.A processor for wireless communication, comprising:at least one controller coupled with at least one memory and configured to cause the processor to:transmit, to a first base station (BS) or a second BS, a request for system information (SI) for a network energy saving (NES) cell of the first BS; andreceive the SI from the first BS or the second BS.
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