Indicating parameters associated with radio access network sharing at a cell
By incorporating PLMN-level parameters in the System Information Block of wireless communication networks, the challenge of accurately determining IMS emergency call support is addressed, enabling efficient and timely emergency call establishment.
Patent Information
- Application Number
- PCT/CN2023/122477
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-09-28
- Publication Date
- 2025-04-03
AI Technical Summary
In wireless communication networks, especially in Multiple Operator Core Network (MOCN) cells, there is a challenge in accurately indicating whether a particular Public Land Mobile Network (PLMN) supports Internet Protocol multimedia subsystem (IMS) emergency calls, leading to potential delays and inefficiencies in establishing such calls.
The implementation of a System Information Block (SIB) that includes both cell-level and PLMN-level parameters associated with IMS emergency calling, allowing user equipment (UE) to receive finer granularity information on PLMN support for IMS emergency calls, thereby enabling intelligent selection of suitable PLMNs.
This approach ensures that user equipment can accurately select a PLMN that supports IMS emergency calls, reducing delays, unnecessary signaling, and power consumption, while improving overall system performance by ensuring timely and efficient emergency call establishment.
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Figure CN2023122477_03042025_PF_FP_ABST
Abstract
Description
INDICATING PARAMETERS ASSOCIATED WITH RADIO ACCESS NETWORK SHARING AT A CELL
[0001] FIELD OF THE DISCLOSURE
[0002] Aspects of the present disclosure generally relate to wireless communication and specifically, to techniques and apparatuses for indicating parameters associated with radio access network (RAN) sharing at a cell.BACKGROUND
[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (for example, bandwidth or transmit power) . Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) . LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
[0004] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipments (UEs) to communicate on a municipal, national, regional, or global level. New Radio (NR) , which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful.
[0005] In a wireless communication network, an Internet Protocol (IP) multimedia subsystem (IMS) framework may enable voice, video, and other multimedia services over an IP network. An IMS emergency call may be supported by the IMS framework. An IMS emergency call may be an emergency call that is routed through an IMS network, as opposed to a non-IMS network. A given cell may or may not support IMS emergency calls. A UE in a cell may be notified as to whether the cell supports IMS emergency calls. When supported by the cell, the UE may initiate an IMS emergency call in case of an emergency.SUMMARY
[0006] In some implementations, an apparatus for wireless communication at a user equipment (UE) includes one or more memories storing processor-executable code. The apparatus includes one or more processors coupled with the one or more memories. The at least one processor of the one or more processors are configured to cause the UE to receive, via a system information block (SIB) , a first parameter for a cell, wherein the first parameter is a cell level parameter associated with Internet Protocol multimedia subsystem (IMS) emergency calling. The at least one processor of the one or more processors are configured to cause the UE to receive, via the SIB, a second parameter that supports radio access network (RAN) sharing at the cell, wherein the second parameter is a public land mobile network (PLMN) level parameter associated with IMS emergency calling. The at least one processor of the one or more processors are configured to cause the UE to transmit signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.
[0007] In some implementations, an apparatus for wireless communication at a network node includes one or more memories storing processor-executable code. The apparatus includes one or more processors coupled with the one or more memories. The at least one processor of the one or more processors are configured to cause the network node to transmit, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling. The at least one processor of the one or more processors are configured to cause the network node to transmit, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling. The at least one processor of the one or more processors are configured to cause the network node to receive signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.
[0008] In some implementations, a method of wireless communication performed at a UE includes receiving, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling. The method includes receiving, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling. The method includes transmitting signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.
[0009] In some implementations, a method of wireless communication performed at a network node includes transmitting, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling. The method includes transmitting, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling. The method includes receiving signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.
[0010] In some implementations, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling. The one or more instructions, when executed by the one or more processors of the UE, cause the UE to: receive, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling. The one or more instructions, when executed by the one or more processors of the UE, cause the UE to: transmit signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.
[0011] In some implementations, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a network node, cause the network node to: transmit, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling. The one or more instructions, when executed by the one or more processors of the network node, cause the network node to: transmit, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling. The one or more instructions, when executed by the one or more processors of the network node, cause the network node to: receive signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.
[0012] In some implementations, an apparatus for wireless communication includes means for receiving, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling. The apparatus includes means for receiving, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling. The apparatus includes means for transmitting signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.
[0013] In some implementations, an apparatus for wireless communication includes means for transmitting, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling. The apparatus includes means for transmitting, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling. The apparatus includes means for receiving signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.
[0014] Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network node, network entity, wireless communication device, or processing system as substantially described with reference to and as illustrated by the drawings and specification.
[0015] The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.BRIEF DESCRIPTION OF THE DRAWINGS
[0016] So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only some typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.
[0017] Figure 1 is a diagram illustrating an example of a wireless network.
[0018] Figure 2 is a diagram illustrating an example of a network node in communication with a user equipment (UE) in a wireless network.
[0019] Figure 3 is a diagram illustrating an example of a system information block (SIB) that indicates an Internet Protocol multimedia subsystem (IMS) emergency support.
[0020] Figure 4 is a diagram illustrating an example of a multiple operator core network (MOCN) .
[0021] Figure 5 is a diagram illustrating an example associated with indicating parameters associated with radio access network (RAN) sharing at a cell.
[0022] Figures 6-7 are diagrams illustrating example processes associated with indicating parameters associated with RAN sharing at a cell.
[0023] Figures 8-9 are diagrams of example apparatuses for wireless communication, in accordance with the present disclosure.DETAILED DESCRIPTION
[0024] Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and are not to be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art may appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any quantity of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. Any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
[0025] Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or a combination of hardware and software. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0026] A wireless communication network may support a multiple operator carrier network (MOCN) . A MOCN cell in the wireless communication network may be associated with a radio access network (RAN) . The RAN may include one or more network nodes (for example, one or more gNodeBs) . The RAN may communicate with a first operator core network, which may be associated with a first network provider. The RAN may communicate with a second operator core network, which may be associated with a second network provider. The first operator core network may be associated with a first public land mobile network (PLMN) , such as a private PLMN. The second operator core network may be associated with a second PLMN, such as a public PLMN. The MOCN, or the MOCN cell, may be associated with RAN sharing between the first PLMN (for example, the private PLMN) and the second PLMN (for example, the public PLMN) . In other words, in the MOCN, the same RAN may be used by both the first PLMN and the second PLMN.
[0027] In the MOCN cell, the private PLMN may not have Internet Protocol (IP) multimedia subsystem (IMS) support, which may include no support for IMS emergency calls. In the MOCN cell, the public PLMN may support IMS emergency calls, but IMS emergency calls may not be supported in the private PLMN. A user equipment (UE) in the MOCN cell that is associated with the private PLMN may be prohibited from making IMS emergency calls, whereas a UE in the MOCN cell that is associated with the public PLMN may be allowed to make IMS emergency calls.
[0028] A lack of support of IMS emergency calls in the private PLMN may lead to various scenarios. In a first example, a UE may receive, from a network node associated with an MOCN cell, a system information block (SIB) type 1 (SIB1) that indicates an IMS emergency support is set to true. In other words, the SIB1 may indicate that IMS emergency calls are supported. During an initial camping procedure, an IMS emergency call may be pending. The UE may initially camp on the private PLMN, which may be based at least in part on the IMS emergency support being set to true in the SIB1. The UE may perform an emergency attach to initiate the IMS emergency call, but because the UE is connected to the private PLMN which does not support IMS emergency calls, the private PLMN may reject the emergency attach. The UE may be unable to make the IMS emergency call when connected to the private PLMN. The UE may be able to disconnect from the private PLMN and connect to the public PLMN in order to make the IMS emergency call, but such approach may involve additional time and signaling, which may degrade a performance of the UE. During the initial camping procedure, the UE should not select the private PLMN because the private PLMN does not support IMS emergency calls.
[0029] As another example, an MOCN cell may be configured as a RAN sharing cell. The MOCN cell may be associated with a first PLMN and a second PLMN. The first PLMN and the second PLMN may both be public PLMNs. The first PLMN may support IMS emergency calls, but the second PLMN may not support IMS emergency calls. A UE may receive, from a network node associated with the MOCN cell, a SIB1 that indicates an IMS emergency support is set to true. In other words, the SIB1 may indicate that IMS emergency calls are supported. During an initial camping procedure, an IMS emergency call may be pending. The UE may initially camp on the second PLMN, which may be based at least in part on the IMS emergency support being set to true in the SIB1. The UE may perform an emergency attach to initiate the IMS emergency call, but because the UE is connected to the second PLMN which does not support IMS emergency calls, the second PLMN may reject the emergency attach. The UE may be unable to make the IMS emergency call when connected to the second PLMN. The UE may be able to disconnect from the second PLMN and connect to the first PLMN in order to make the IMS emergency call, but such approach may involve additional time and signaling, which may degrade a performance of the UE. During the initial camping procedure, the UE should not select the second PLMN because the second PLMN does not support IMS emergency calls.
[0030] A SIB, such as SIB1, may indicate to a UE that a given cell supports IMS emergency calls. The SIB may indicate that the given cell supports IMS emergency bearer services for UEs in a limited service mode. However, when the cell is an MOCN cell (for example, a cell that permits RAN sharing between a private PLMN and a public PLMN) , the public PLMN may support IMS emergency calls but the private PLMN may not support IMS emergency calls. The SIB that indicates the cell support IMS emergency calls may not consider whether the cell is an MOCN cell, which may cause the SIB to mistakenly indicate the cell supports IMS emergency calls when in fact a specific PLMN of the cell does not support IMS emergency calls. An IMS emergency call support parameter in the SIB may not actually indicate a real IMS emergency status (for example, whether IMS emergency calls are actually supported) in the MOCN cell (for example, a RAN sharing cell) . An IMS emergency call support may depend on a network operator core network instead of a cell capability.
[0031] In the MOCN cell, based at least in part on the SIB indicating the cell supports IMS emergency calls, the UE may connect to the private PLMN and attempt to initiate an IMS emergency call via the private PLMN. Since the private PLMN does not support IMS emergency calls, the private PLMN may reject the UE’s attempt to make the IMS emergency call. The UE may attempt to make the IMS emergency call via the private PLMN when the private PLMN does not support IMS emergency calls, which may result in delay for establishing the IMS emergency calls, unnecessary signaling, unnecessary power consumption at the UE, and / or unnecessary consumption of network resources, thereby degrading an overall performance of the UE and / or a network.
[0032] Various aspects relate generally to indicating parameters associated with RAN sharing at a cell. Some aspects more specifically relate to transmitting, via an information element (IE) in a SIB, a parameter indicating whether or not a particular PLMN in a cell supports an IMS emergency call in a RAN sharing scenario.
[0033] In some aspects, a UE may receive, via a SIB1, a first parameter. The first parameter may be a cell-specific parameter, a gNB-specific parameter, or a central unit (CU) or distributed unit (DU) (CU / DU) -specific parameter that is broadcasted in the SIB1. The UE may also receive, via the SIB1, a second parameter. The second parameter may be a cell-specific parameter or a more granular parameter, such as a PLMN-specific parameter. The second parameter may be an extension of the first parameter to support MOCN / RAN sharing scenarios. In other words, the second parameter may augment the first parameter by providing support for MOCN / RAN sharing scenarios, which may not be supported using only the first parameter.
[0034] In some aspects, the first parameter may be a cell level IMS emergency support IE, which may indicate whether a cell supports IMS emergency bearer services. The second parameter may be a PLMN level IMS emergency support IE. The PLMN level IMS emergency support IE may indicate whether a PLMN associated with the cell supports an IMS emergency call. The PLMN level IMS emergency support IE may be separate from the cell level IMS emergency support IE. The PLMN level IMS emergency support IE may be an extension of the cell level IMS emergency support IE. The PLMN level IMS emergency support IE may be associated with a finer granularity, as compared to the cell level IMS emergency support IE, to support RAN sharing at a cell. The cell may be a MOCN cell, which may support RAN sharing between multiple PLMNs. The multiple PLMNs may include one or more public PLMNs and / or one or more private PLMNs, which may all be supported by the cell.
[0035] In some aspects, the PLMN level IMS emergency support IE may indicate the multiple PLMNs associated with the cell, and for each PLMN, the PLMN level IMS emergency support IE may indicate whether that PLMN supports the IMS emergency call or does not support the IMS emergency call. For example, the PLMN level IMS emergency support IE may indicate a private PLMN that does not support the IMS emergency call and a public PLMN that does support the IMS emergency call. In other words, the public PLMN may be capable of supporting the IMS emergency call, and the private PLMN may be not capable of supporting the IMS emergency call.
[0036] In some aspects, when a plurality of PLMNs (for example, all PLMNs) associated with the cell support the IMS emergency call, the cell level IMS emergency support IE may be set to true, and the PLMN level IMS emergency support IE may not be indicated in the SIB1. However, when some PLMNs associated with the cell support the IMS emergency call and other PLMNs associated with the cell do not support the IMS emergency call, the PLMN level IMS emergency support IE may be signaled, and the PLMN level IMS emergency support IE may take precedence over the cell level IMS emergency support IE. In other words, the cell level IMS emergency support IE may be ignored by the UE when the PLMN level IMS emergency support IE is present.
[0037] In some aspects, the PLMN level IMS emergency support IE may be an extended IMS emergency support (ims-EmergencySupportExt) IE, which may be a newly defined IE in the SIB. The PLMN level IMS emergency support IE may be set to true when the PLMN supports the IMS emergency call. The PLMN level IMS emergency support IE may be set to false when the PLMN does not support the IMS emergency call. In some aspects, the PLMN level IMS emergency support IE may be associated with PLMN identity information (PLMN-IdentityInfo) in the SIB. In some aspects, the PLMN level IMS emergency support IE may include an IMS emergency information list (ims-EmergencyInfoList) . The IMS emergency information list may include a list of entries. An entry, in the list of entries, may be associated with a PLMN in a list of PLMN identifiers (PLMN-identityList) . The entry may indicate whether the PLMN supports the IMS emergency call.
[0038] In some aspects, the UE may select the PLMN in accordance with the PLMN level IMS emergency support IE. The UE may select the PLMN, which may be capable of supporting IMS emergency calls. For example, the UE may select the public PLMN instead of the private PLMN because the private PLMN may not be capable of supporting IMS emergency calls. In some aspects, when the UE is initially camping on the cell and the IMS emergency call is pending, the UE may select the public PLMN to connect to so the IMS emergency call, as opposed to the private PLMN which may not support the IMS emergency call.
[0039] In some aspects, the UE may transmit, to the network node and in accordance with the PLMN level IMS emergency support IE, signaling to establish the IMS emergency call using the PLMN. The UE may be capable of using the IE in order to transmit the signaling to establish the IMS emergency call. The UE may transmit the signaling to establish the IMS emergency using the public PLMN, as opposed to the private PLMN, which may not support the IMS emergency call.
[0040] Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages.
[0041] In some aspects, by extending a cell-specific parameter to a PLMN-specific parameter, the PLMN-specific parameter may be able to support MOCN / RAN sharing scenarios. The cell-specific parameter may be at the cell level, which may result in the cell-specific parameter not supporting MOCN / RAN sharing scenarios. The PLMN-specific parameter may provide finer granularity, as compared to the cell-specific parameter, which may allow MOCN / RAN sharing scenarios to be supported.
[0042] In some aspects, by transmitting the PLMN level IMS emergency support IE to indicate whether the PLMN associated with a cell supports an IMS emergency call, the UE may become aware of which PLMNs support IMS emergency calls and which PLMNs do not support IMS emergency calls. Without the PLMN level IMS emergency support IE, the UE may be unaware of whether the PLMN supports or does not support the IMS emergency call. Such information in the PLMN level IMS emergency support IE may allow the UE to intelligently select a suitable PLMN identifier (ID) .
[0043] In some aspects, by transmitting both the cell level IMS emergency support IE and the PLMN level IMS emergency support IE, the PLMN level IMS emergency support IE may provide additional granularity as compared to information conveyed in the cell level IMS emergency support IE. The cell level IMS emergency support IE may only indicate whether the cell, as a whole, supports IMS emergency bearer services. The cell level IMS emergency support IE does not consider a scenario when the cell is the MOCN cell, in which case the cell is associated with multiple operators and multiple PLMNs, where some PLMNs may support IMS emergency calls and some PLMNs may not support IMS emergency calls. By augmenting the cell level IMS emergency support IE with the PLMN level IMS emergency support IE, the UE may have a clearer understanding of specific PLMNs associated with the cell that do or do not support IMS emergency calls.
[0044] In some aspects, by using the PLMN level IMS emergency support IE received from the network node, the UE may be able to select a PLMN that actually supports the IMS emergency call, instead of selecting a PLMN that appears to support the IMS emergency call (due to the cell level IMS emergency support IE) but does not actually support the IMS emergency call. By using the PLMN level IMS emergency support IE received from the network node, the UE may avoid a scenario in which the UE initially attempts to use a PLMN that does not support the IMS emergency call, and then the UE needs to retry to establish the IMS emergency call using another PLMN. Such a scenario may increase delay for establishing the IMS emergency call, increase an amount of signaling between the UE and the network node, increase a power consumption at the UE, and / or increase a waste of network resources. As a result, by using the PLMN level IMS emergency support IE received from the network node, an overall system performance may be improved.
[0045] Figure 1 is a diagram illustrating an example of a wireless network. The wireless network 100 may be or may include elements of a 5G (for example, NR) network or a 4G (for example, Long Term Evolution (LTE) ) network, among other examples. The wireless network 100 may include one or more network nodes 110 (shown as a network node (NN) 110a, a network node 110b, a network node 110c, and a network node 110d) , a UE 120 or multiple UEs 120 (shown as a UE 120a, a UE 120b, a UE 120c, a UE 120d, and a UE 120e) , or other network entities. A network node 110 is an entity that communicates with UEs 120. As shown, a network node 110 may include one or more network nodes. For example, a network node 110 may be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (for example, within a single device or unit) . As another example, a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , meaning that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (such as one or more CUs, one or more DUs, or one or more radio units (RUs) ) .
[0046] In some examples, a network node 110 is or includes a network node that communicates with UEs 120 via a radio access link, such as an RU. In some examples, a network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, a network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or a core network via a backhaul link, such as a CU. In some examples, a network node 110 (such as an aggregated network node 110 or a disaggregated network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, or one or more DUs. A network node 110 may include, for example, an NR network node, an LTE network node, a Node B, an eNB (for example, in 4G) , a gNB (for example, in 5G) , an access point, or a transmission reception point (TRP) , a DU, an RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, and / or a RAN node. In some examples, the network nodes 110 may be interconnected to one another or to one or more other network nodes 110 in the wireless network 100 through various types of fronthaul, midhaul, or backhaul interfaces, such as a direct physical connection, an air interface, or a virtual network, using any suitable transport network.
[0047] Each network node 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP) , the term “cell” can refer to a coverage area of a network node 110 or a network node subsystem serving this coverage area, depending on the context in which the term is used.
[0048] A network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs 120 with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscription. A femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs 120 having association with the femto cell (for example, UEs 120 in a closed subscriber group (CSG) ) . A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. A network node 110 for a femto cell may be referred to as a femto network node or an in-home network node.
[0049] In some aspects, the terms “base station” or “network node” may refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, “base station” or “network node” may refer to a CU, a DU, an RU, a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) , and / or a Non-Real Time (Non-RT) RIC. In some aspects, the terms “base station” or “network node” may refer to one device configured to perform one or more functions, such as those described herein in connection with the network node 110. In some aspects, the terms “base station” or “network node” may refer to a plurality of devices configured to perform the one or more functions. For example, in some distributed systems, each of a quantity of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to duplicate performance of at least a portion of the function, and the terms “base station” or “network node” may refer to any one or more of those different devices. In some aspects, the terms “base station” or “network node” may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the terms “base station” or “network node” may refer to one of the base station functions and not another. In this way, a single device may include more than one base station.
[0050] A network controller 130 may couple to or communicate with a set of network nodes 110 and may provide coordination and control for these network nodes 110. The network controller 130 may communicate with the network nodes 110 via a backhaul communication link. The network nodes 110 may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link. In some aspects, the network controller 130 may be a CU or a core network device, or the network controller 130 may include a CU or a core network device.
[0051] The wireless network 100 may include one or more relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (for example, a network node 110 or a UE 120) and send a transmission of the data to a downstream station (for example, a UE 120 or a network node 110) . A relay station may be a UE 120 that can relay transmissions for other UEs 120. In the example shown in Figure 1, the network node 110d (for example, a relay network node) may communicate with the network node 110a (for example, a macro network node) and the UE 120d in order to facilitate communication between the network node 110a and the UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay network node, or a relay.
[0052] The UEs 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile. A UE 120 may include, for example, an access terminal, a terminal, a mobile station, or a subscriber unit. A UE 120 may be a cellular phone (for example, a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (for example, a smart watch, smart clothing, smart glasses (for example, an augmented reality (AR) , virtual reality (VR) , mixed reality, or extended reality (XR) headset) , a smart wristband, smart jewelry (for example, a smart ring or a smart bracelet) ) , an entertainment device (for example, a music device, a video device, or a satellite radio) , a vehicular component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, a UE function of a network node, or any other suitable device that is configured to communicate via a wireless medium. Some UEs 120 (for example, UEs 120a and 120e) may communicate directly using one or more sidelink channels (for example, without a network node as an intermediary to communicate with one another) .
[0053] Some UEs 120 may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. An MTC UE or an eMTC UE may include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, or a location tag, that may communicate with a network node, another device (for example, a remote device) , or some other entity. Some UEs 120 may be considered Internet-of-Things (IoT) devices, or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered a Customer Premises Equipment. A UE 120 may be included inside a housing that houses components of the UE 120, such as processor components or memory components. In some examples, the processor components and the memory components may be coupled together. For example, the processor components (for example, one or more processors) and the memory components (for example, a memory) may be operatively coupled, communicatively coupled, electronically coupled, or electrically coupled.
[0054] In some examples, two or more UEs 120 (for example, shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (for example, without using a network node 110 as an intermediary to communicate with one another) . For example, the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (for example, which may include a vehicle-to-vehicle (V2V) protocol using for example a PC5 interface for direct communication, a vehicle-to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol) , or a mesh network. In such examples, a UE 120 may perform scheduling operations, resource selection operations, or other operations described elsewhere herein as being performed by the network node 110. In other examples, the two or more UEs 120 may communicate through a vehicle-to-network-vehicle (V2N2V) protocol for example by communicating through a Uu interface using the LTE and / or NR uplink and downlink.
[0055] In some aspects, a UE (for example, the UE 120) may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling; receive, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling; and transmit signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter. Additionally, or alternatively, the communication manager 140 may perform one or more other operations described herein.
[0056] In some aspects, a network node (for example, the network node 110) may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may transmit, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling; transmit, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling; and receive signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter. Additionally, or alternatively, the communication manager 150 may perform one or more other operations described herein.
[0057] Figure 2 is a diagram illustrating an example network node in communication with a UE in a wireless network. The network node may correspond to the network node 110 of Figure 1. Similarly, the UE may correspond to the UE 120 of Figure 1. The network node 110 may be equipped with a set of antennas 234a through 234t, such as T antennas (T ≥ 1) . The UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas (R ≥ 1) . The network node 110 of depicted in Figure 2 includes one or more radio frequency components, such as antennas 234 and a modem 232. In some examples, a network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs, or one or more DUs.
[0058] At the network node 110, a transmit processor 220 may receive data, from a data source 212, intended for the UE 120 (or a set of UEs 120) . The transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from that UE 120. The network node 110 may process (for example, encode and modulate) the data for the UE 120 based at least in part on the MCS (s) selected for the UE 120 and may provide data symbols for the UE 120. The transmit processor 220 may process system information (for example, for semi-static resource partitioning information (SRPI) ) and control information (for example, CQI requests, grants, or upper layer signaling) and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (for example, a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS) ) and synchronization signals (for example, a primary synchronization signal (PSS) or a secondary synchronization signal (SSS) ) . A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (for example, precoding) on the data symbols, the control symbols, the overhead symbols, or the reference symbols, if applicable, and may provide a set of output symbol streams (for example, T output symbol streams) to a corresponding set of modems 232 (for example, T modems) , shown as modems 232a through 232t. For example, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232. Each modem 232 may use a respective modulator component to process a respective output symbol stream (for example, for OFDM) to obtain an output sample stream. Each modem 232 may further use a respective modulator component to process (for example, convert to analog, amplify, filter, or upconvert) the output sample stream to obtain a downlink signal. The modems 232a through 232t may transmit a set of downlink signals (for example, T downlink signals) via a corresponding set of antennas 234 (for example, T antennas) , shown as antennas 234a through 234t.
[0059] At the UE 120, a set of antennas 252 (shown as antennas 252a through 252r) may receive the downlink signals from the network node 110 or other network nodes 110 and may provide a set of received signals (for example, R received signals) to a set of modems 254 (for example, R modems) , shown as modems 254a through 254r. For example, each received signal may be provided to a demodulator component (shown as DEMOD) of a modem 254. Each modem 254 may use a respective demodulator component to condition (for example, filter, amplify, downconvert, or digitize) a received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (for example, for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols. A receive processor 258 may process (for example, demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to a data sink 260, and may provide decoded control information and system information to a controller / processor 280. The term “controller / processor” may refer to one or more controllers and / or one or more processors. A channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, or a CQI parameter, among other examples. In some examples, one or more components of the UE 120 may be included in a housing 284.
[0060] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.
[0061] One or more antennas (for example, antennas 234a through 234t or antennas 252a through 252r) may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, or an antenna array may include one or more antenna elements (within a single housing or multiple housings) , a set of coplanar antenna elements, a set of non-coplanar antenna elements, or one or more antenna elements coupled to one or more transmission or reception components, such as one or more components of Figure 2.
[0062] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (for example, for reports that include RSRP, RSSI, RSRQ, or CQI) from the controller / processor 280. The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modems 254 (for example, for DFT-s-OFDM or CP-OFDM) , and transmitted to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of the antenna (s) 252, the modem (s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, or the TX MIMO processor 266. The transceiver may be used by a processor (for example, the controller / processor 280) and the memory 282 to perform aspects of any of the methods described herein.
[0063] At the network node 110, the uplink signals from UE 120 or other UEs may be received by the antennas 234, processed by the modem 232 (for example, a demodulator component, shown as DEMOD, of the modem 232) , detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and provide the decoded control information to the controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink or uplink communications. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of the antenna (s) 234, the modem (s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, or the TX MIMO processor 230. The transceiver may be used by a processor (for example, the controller / processor 240) and the memory 242 (for example, one or more memories) to perform aspects of any of the methods described herein.
[0064] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, or any other component (s) of Figure 2 may perform one or more techniques associated with indicating parameters associated with RAN sharing at a cell, as described in more detail elsewhere herein. For example, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, or any other component (s) of Figure 2 may perform or direct operations of, for example, process 600 of Figure 6, process 700 of Figure 7, or other processes as described herein. The memory 242 and the memory 282 may store data and program codes for the network node 110 and the UE 120, respectively. In some examples, the memory 242 or the memory 282 may include a non-transitory computer-readable medium storing one or more instructions (for example, code or program code) for wireless communication. For example, the one or more instructions, when executed (for example, directly, or after compiling, converting, or interpreting) by one or more processors of the network node 110 or the UE 120, may cause the one or more processors, the UE 120, or the network node 110 to perform or direct operations of, for example, process 600 of Figure 6, process 700 of Figure 7, or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, or interpreting the instructions, among other examples. In some implementations, one or more of the multiple memories may be configured to store processor-executable code that, when executed, may configure the one or more processors to perform various functions described herein (as part of a processing system) . In some other implementations, the processing system may be pre-configured to perform various functions described herein.
[0065] In some aspects, an individual processor may perform all of the functions described as being performed by one or more processors. In some aspects, one or more processors may collectively perform (or be configured or operable to perform) a set of functions. For example, a first set of (one or more) processors of the one or more processors may perform a first function described as being performed by the one or more processors, and a second set of (one or more) processors of the one or more processors may perform a second function described as being performed by the one or more processors. The first set of processors and the second set of processors may be the same set of processors or may be different sets of processors. Reference to “one or more processors” should be understood to refer to any one or more of the processors described in connection with Figure 2. Reference to “one or more memories” should be understood to refer to any one or more memories of a corresponding device, such as the memory described in connection with Figure 2. For example, functions described as being performed by one or more memories can be performed by the same subset of the one or more memories or different subsets of the one or more memories.
[0066] In some aspects, a UE (for example, the UE 120) includes means for receiving, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling; means for receiving, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling; and / or means for transmitting signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter. The means for the UE to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.
[0067] In some aspects, a network node (for example, the network node) includes means for transmitting, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling; means for transmitting, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling and / or means for receiving signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter. The means for the network node to perform operations described herein may include, for example, one or more of communication manager 150, transmit processor 220, TX MIMO processor 230, modem 232, antenna 234, MIMO detector 236, receive processor 238, controller / processor 240, memory 242, or scheduler 246.
[0068] Figure 3 is a diagram illustrating an example 300 of a SIB that indicates an IMS emergency support. In a first operation 302, a network node 110 may transmit the SIB to a UE 120. The SIB may be a SIB1. The SIB may include an IMS emergency support (ims-EmergencySupport) parameter. The IMS emergency support parameter may indicate whether a cell supports IMS emergency bearer services for UEs in a limited service mode. When the IMS emergency support parameter is absent, an IMS emergency call may not be supported by a network in the cell for UEs in the limited service mode. In a second operation 304, the UE, depending on whether the IMS emergency support parameter is received in the SIB, may initiate the IMS emergency call.
[0069] Figure 4 is a diagram illustrating an example 400 of an MOCN.
[0070] As shown in Figure 4, a network node 110 may be shared between network providers. The network node 110 may be associated with a RAN. A first operator core network 402 may be associated with a first network provider. A second operator core network 404 may be associated with a second network provider. The first operator core network 402 may be separate from the second operator core network 404. In other words, a core network may be proprietary to each network provider. The first operator core network 402 may be associated with a first PLMN, such as a private network. The first PLMN may be a private PLMN. The second operator core network 404 may be associated with a second PLMN, such as a public network. The second PLMN may be a public PLMN.
[0071] The MOCN, or an MOCN cell, may be associated with RAN sharing between the private network and the public network. The network node 110 may be able to communicate with a plurality of UEs, such as a first UE 120a and a second UE 120e. The first UE 120a may be associated with the first operator core network 402 (for example, the private network) . The second UE 120b may be associated with the second operator core network 404 (for example, the public network) . Further, the first operator core network 402 and the second operator core network 404 may share the same radio frequencies.
[0072] In the MOCN cell, the private PLMN may not have IMS support, which may include no support for IMS emergency calls. In the MOCN cell, the public PLMN may support IMS emergency calls, but IMS emergency calls may not be supported in the private PLMN. A UE in the MOCN cell that is associated with the private PLMN may be prohibited from making IMS emergency calls, whereas a UE in the MOCN cell that is associated with the public PLMN may be allowed to make IMS emergency calls.
[0073] A lack of support of IMS emergency calls in the private PLMN may lead to various scenarios. In a first example, a UE may receive, from a network node associated with an MOCN cell, a SIB1 that indicates an IMS emergency support is set to true. In other words, the SIB1 may indicate that IMS emergency calls are supported. During an initial camping procedure, an IMS emergency call may be pending. The UE may initially camp on the private PLMN, which may be based at least in part on the IMS emergency support being set to true in the SIB1. The UE may perform an emergency attach to initiate the IMS emergency call, but because the UE is connected to the private PLMN which does not support IMS emergency calls, the private PLMN may reject the emergency attach. The UE may be unable to make the IMS emergency call when connected to the private PLMN. The UE may be able to disconnect from the private PLMN and connect to the public PLMN in order to make the IMS emergency call, but such approach may involve additional time and signaling, which may degrade a performance of the UE. During the initial camping procedure, the UE should not select the private PLMN because the private PLMN does not support IMS emergency calls.
[0074] As another example, an MOCN cell may be configured as a RAN sharing cell. The MOCN cell may be associated with a first PLMN and a second PLMN. The first PLMN and the second PLMN may both be public PLMNs. The first PLMN may support IMS emergency calls, but the second PLMN may not support IMS emergency calls. A UE may receive, from a network node associated with the MOCN cell, a SIB1 that indicates an IMS emergency support is set to true. In other words, the SIB1 may indicate that IMS emergency calls are supported. During an initial camping procedure, an IMS emergency call may be pending. The UE may initially camp on the second PLMN, which may be based at least in part on the IMS emergency support being set to true in the SIB1. The UE may perform an emergency attach to initiate the IMS emergency call, but because the UE is connected to the second PLMN which does not support IMS emergency calls, the second PLMN may reject the emergency attach. The UE may be unable to make the IMS emergency call when connected to the second PLMN. The UE may be able to disconnect from the second PLMN and connect to the first PLMN in order to make the IMS emergency call, but such approach may involve additional time and signaling, which may degrade a performance of the UE. During the initial camping procedure, the UE should not select the second PLMN because the second PLMN does not support IMS emergency calls.
[0075] A SIB, such as SIB1, may indicate to a UE that a given cell supports IMS emergency calls. The SIB may indicate that the given cell supports IMS emergency bearer services for UEs in a limited service mode. However, when the cell is an MOCN cell (for example, a cell that permits RAN sharing between a private PLMN and a public PLMN) , the public PLMN may support IMS emergency calls but the private PLMN may not support IMS emergency calls. The SIB that indicates the cell support IMS emergency calls may not consider whether the cell is an MOCN cell, which may cause the SIB to mistakenly indicate the cell supports IMS emergency calls when in fact a specific PLMN of the cell does not support IMS emergency calls. An IMS emergency call support parameter in the SIB may not actually indicate a real IMS emergency status (for example, whether IMS emergency calls are actually supported) in the MOCN cell (for example, a RAN sharing cell) . An IMS emergency call support may depend on a network operator core network instead of a cell capability.
[0076] In the MOCN cell, based at least in part on the SIB indicating the cell supports IMS emergency calls, the UE may connect to the private PLMN and attempt to initiate an IMS emergency call via the private PLMN. Since the private PLMN does not support IMS emergency calls, the private PLMN may reject the UE’s attempt to make the IMS emergency call. The UE may attempt to make the IMS emergency call via the private PLMN when the private PLMN does not support IMS emergency calls, which may result in delay for establishing the IMS emergency calls, unnecessary signaling, unnecessary power consumption at the UE, and / or unnecessary consumption of network resources, thereby degrading an overall performance of the UE and / or a network.
[0077] In various aspects of techniques and apparatuses described herein, a UE may receive, via a SIB1, a PLMN level IMS emergency support IE from a network node. The PLMN level IMS emergency support IE may indicate whether a PLMN associated with a cell supports an IMS emergency call. The cell may be a MOCN cell. The PLMN may be a public PLMN or a private PLMN, which may both be supported by the cell. The PLMN level IMS emergency support IE may indicate multiple PLMNs associated with the cell, and for each PLMN, the PLMN level IMS emergency support IE may indicate whether that PLMN supports the IMS emergency call or does not support the IMS emergency call. For example, the PLMN level IMS emergency support IE may indicate a private PLMN that does not support the IMS emergency call and a public PLMN that does support the IMS emergency call. The UE may select the PLMN in accordance with the PLMN level IMS emergency support IE. For example, the UE may select the public PLMN as opposed to the private PLMN. The UE may transmit, to the network node, signaling to establish the IMS emergency call using the PLMN.
[0078] In some aspects, by indicating to the UE whether or not the PLMN supports the IMS emergency call, the UE may select a suitable PLMN that supports IMS emergency bearer services. By selecting the suitable PLMN that supports IMS emergency bearer services, a delay associated with establishing the IMS emergency call may be reduced. The UE may not select a PLMN that does not support IMS emergency bearer services, which would otherwise increase the delay because the UE would need to select another PLMN in order to perform the IMS emergency call, thereby resulting in an increase of signaling and network resources.
[0079] Figure 5 is a diagram illustrating an example 500 associated with indicating parameters associated with RAN sharing at a cell. As shown in Figure 5, example 500 includes communication between a UE (for example, UE 120) and a network node (for example, network node 110) . In some aspects, the UE and the network node may be included in a wireless network, such as wireless network 100.
[0080] In some aspects, the UE and the network node may be associated with a cell, such as an MOCN cell. The MOCN cell may support RAN sharing between different networks (or multiple PLMNs) , which may include public networks and / or private networks. The multiple PLMNs may include one or more public PLMNs and / or one or more private PLMNs.
[0081] In a first operation 502, the UE may receive, from the network node and via a SIB1, a first parameter for the cell. The first parameter may be a cell level parameter. The first parameter may be a cell-specific parameter, a gNB-specific parameter, or a CU / DU-specific parameter that is broadcasted in the SIB1. The first parameter may be a cell level IMS emergency support IE indicating whether the cell supports IMS emergency bearer services. The cell level IMS emergency support IE may be for the entire cell, even when some PLMNs associated with the cell support IMS emergency calls and other PLMNs associated with the cell do not support IMS emergency calls.
[0082] In a second operation 504, the UE may receive, from the network node and via the SIB1, a second parameter for the cell. The second parameter may be a cell-specific parameter or a more granular parameter, such as a PLMN-specific parameter. The second parameter may be an extension of the first parameter to support MOCN / RAN sharing scenarios. The second parameter may be a PLMN level IMS emergency support IE indicating whether a PLMN associated with the cell supports an IMS emergency call. The PLMN level IMS emergency support IE may be for specific PLMNs in the cell, and not for the entire cell itself. The PLMN level IMS emergency support IE may be separate from the cell level IMS emergency support IE. The PLMN level IMS emergency support IE may be an extension of the cell level IMS emergency support IE. The PLMN level IMS emergency support IE may be associated with a finer granularity, as compared to the cell level IMS emergency support IE, to support RAN sharing at a cell.
[0083] In some aspects, the UE may receive the SIB1 via an over-the-air (OTA) interface between the UE and the network node. The PLMN level IMS emergency support IE may indicate whether the PLMN, which may be a public PLMN or a private PLMN, is capable of supporting the IMS emergency call. The public PLMN may be capable of supporting the IMS emergency call. The private PLMN may be not capable of supporting the IMS emergency call. Without the PLMN level IMS emergency support IE, the UE may be unaware of whether the PLMN supports or does not support the IMS emergency call.
[0084] In some aspects, the SIB may indicate an IMS emergency support IE, which may indicate whether the cell supports IMS emergency bearer services. The IE indicating whether the PLMN associated with the cell supports the IMS emergency call may be irrespective of the IMS emergency support IE in the SIB. In other words, the IE indicating whether the PLMN associated with the cell supports the IMS emergency call may supersede the IMS emergency support IE.
[0085] In some aspects, when a plurality of PLMNs (for example, all PLMNs) associated with the cell support the IMS emergency call, the cell level IMS emergency support IE may be set to true, and the PLMN level IMS emergency support IE may not be indicated in the SIB1. However, when some PLMNs associated with the cell support the IMS emergency call and other PLMNs associated with the cell do not support the IMS emergency call, the PLMN level IMS emergency support IE may be signaled, and the PLMN level IMS emergency support IE may take precedence over the cell level IMS emergency support IE. In other words, the cell level IMS emergency support IE may be ignored by the UE when the PLMN level IMS emergency support IE is present.
[0086] In some aspects, the PLMN level IMS emergency support IE may be an extended IMS emergency support (ims-EmergencySupportExt) IE, which may be a newly defined IE in the SIB1. The PLMN level IMS emergency support IE may be set to true when the PLMN supports the IMS emergency call. The PLMN level IMS emergency support IE may be set to false when the PLMN does not support the IMS emergency call. In some aspects, the PLMN level IMS emergency support IE may be associated with PLMN identity information (PLMN-IdentityInfo) in the SIB1. In some aspects, the PLMN level IMS emergency support IE may include an IMS emergency information list (ims-EmergencyInfoList) . The IMS emergency information list may include a list of entries. An entry, in the list of entries, may be associated with a PLMN in a PLMN identity list (PLMN-identityList) (or a list of PLMN identities) . The entry may indicate whether the PLMN supports the IMS emergency call.
[0087] In some aspects, the ims-EmergencySupportExt IE may be a new IE in the SIB1. The ims-EmergencySupportExt IE may be added in PLMN-IdentityInfo in the SIB1. Alternatively, the ims-EmergencySupportExt IE may be added in the ims-EmergencyInfoList, which may be a newly created list indicated in the SIB1. The ims-EmergencyInfoList may have the same number of entries, and listed in the same order, as PLMNs across PLMN-identityList fields included in the SIB1. Each entry may have one field of ims-EmergencySupportExt. When the SIB1 includes the ims-EmergencySupportExt IE, the SIB1 may indicate whether or not a corresponding PLMN in the PLMN-identityList supports the IMS emergency call, irrespective of an ims- EmergencySupport common field. Further, when the ims-EmergencySupportExt IE is not present in the SIB1, or when the UE does not support the ims-EmergencySupportExt IE, the UE may follow the ims-EmergencySupport common field.
[0088] In a second operation 506, the UE may select the PLMN in accordance with the PLMN level IMS emergency support IE. The UE may select the PLMN, which may be capable of supporting IMS emergency calls. For example, the UE may select the public PLMN instead of the private PLMN because the private PLMN may not be capable of supporting IMS emergency calls. In some aspects, when the UE is initially camping on the cell and the IMS emergency call is pending, the UE may select the public PLMN to connect to so the IMS emergency call, as opposed to the private PLMN which may not support the IMS emergency call.
[0089] In a second operation 508, the UE may transmit, to the network node signaling to establish the IMS emergency call using the first parameter and / or the second parameter. The UE may transmit, to the network node and in accordance with the PLMN level IMS emergency support IE, the signaling to establish the IMS emergency call using the PLMN. The UE may be capable of using the PLMN level IMS emergency support IE in order to transmit the signaling to establish the IMS emergency call. The UE may transmit the signaling to establish the IMS emergency using the public PLMN, as opposed to the private PLMN, which may not support the IMS emergency call. In some aspects, by using the PLMN level IMS emergency support IE received from the network node, the UE may be able to select a PLMN that actually supports IMS emergency bearer services, instead of selecting a PLMN that appears to support IMS emergency bearer services but does not actually support the IMS emergency bearer services. By using the PLMN level IMS emergency support IE received from the network node, a delay associated with establishing the IMS emergency call may be reduced because the UE may not need to retry to establish the IMS emergency call using another PLMN.
[0090] Figure 6 is a flowchart illustrating an example process 600 performed, for example, at a UE or an apparatus of a UE that supports indicating parameters associated with RAN sharing at a cell in accordance with the present disclosure. Example process 600 is an example where the apparatus or the UE (for example, UE 120) performs operations associated with indicating, via an IE in a SIB, whether or not a particular PLMN in a cell supports an IMS emergency call.
[0091] As shown in Figure 6, in some aspects, process 600 may include receiving, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling (block 610) . For example, the UE (such as by using communication manager 140 or reception component 802, depicted in Figure 8) may receive a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling, as described above.
[0092] As further shown in Figure 6, in some aspects, process 600 may include receiving, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling (block 620) . For example, the UE (such as by using communication manager 140 or reception component 802, depicted in Figure 8) may receive, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling, as described above.
[0093] As further shown in Figure 6, in some aspects, process 600 may include transmitting signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter (block 630) . For example, the UE (such as by using communication manager 140 or transmission component 804, depicted in Figure 8) may transmit signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter, as described above.
[0094] Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.
[0095] In a first additional aspect, the second parameter is associated with a finer granularity, as compared to the first parameter, to support the RAN sharing at the cell.
[0096] In a second additional aspect, alone or in combination with the first aspect, the first parameter is a cell level IMS emergency support IE indicating whether the cell supports IMS emergency bearer services, and the second parameter is a PLMN level IMS emergency support IE indicating whether a PLMN associated with the cell supports an IMS emergency call.
[0097] In a third additional aspect, alone or in combination with one or more of the first and second aspects, process 600 includes selecting the PLMN in accordance with the PLMN level IMS emergency support IE, and transmitting, in accordance with the PLMN level IMS emergency support IE, signaling to establish the IMS emergency call using the PLMN.
[0098] In a fourth additional aspect, alone or in combination with one or more of the first through third aspects, a field of the PLMN level IMS emergency support IE is set to true in response to the PLMN supporting the IMS emergency call.
[0099] In a fifth additional aspect, alone or in combination with one or more of the first through fourth aspects, a field of the PLMN level IMS emergency support IE is set to false in response to the PLMN not supporting the IMS emergency call.
[0100] In a sixth additional aspect, alone or in combination with one or more of the first through fifth aspects, the PLMN level IMS emergency support IE is a list of entries, wherein an entry, in the list of entries, is associated with a PLMN in a list of PLMN identities, and the entry indicates whether the PLMN supports the IMS emergency call.
[0101] In a seventh additional aspect, alone or in combination with one or more of the first through sixth aspects, the PLMN is a public PLMN associated with the cell or a private PLMN associated with the cell.
[0102] In an eighth additional aspect, alone or in combination with one or more of the first through seventh aspects, a capability associated with using the PLMN level IMS emergency support IE is supported by the UE.
[0103] In a ninth additional aspect, alone or in combination with one or more of the first through eighth aspects, the PLMN level IMS emergency support IE is associated with PLMN identity information in the SIB.
[0104] In a tenth additional aspect, alone or in combination with one or more of the first through ninth aspects, the cell is an MOCN cell.
[0105] In an eleventh additional aspect, alone or in combination with one or more of the first through tenth aspects, the SIB is a SIB1.
[0106] Although Figure 6 shows example blocks of process 600, in some aspects, process 600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 6. Additionally or alternatively, two or more of the blocks of process 600 may be performed in parallel.
[0107] Figure 7 is a flowchart illustrating an example process 700 performed, for example, at a network node or an apparatus of a network node that supports indicating parameters associated with RAN sharing at a cell in accordance with the present disclosure. Example process 700 is an example where the apparatus or the network node (for example, network node 110) performs operations associated with indicating, via an IE in a SIB, whether or not a particular PLMN in a cell supports an IMS emergency call.
[0108] As shown in Figure 7, in some aspects, process 700 may include transmitting, via a SIB, a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling (block 710) . For example, the network node (such as by using communication manager 150 or transmission component 904, depicted in Figure 9) may transmit a first parameter for a cell, wherein the first parameter is a cell level parameter associated with IMS emergency calling, as described above.
[0109] As further shown in Figure 7, in some aspects, process 700 may include transmitting, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling (block 720) . For example, the network node (such as by using communication manager 150 or transmission component 904, depicted in Figure 9) may transmit, via the SIB, a second parameter that supports RAN sharing at the cell, wherein the second parameter is a PLMN level parameter associated with IMS emergency calling, as described above.
[0110] As further shown in Figure 7, in some aspects, process 700 may include receiving signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter (block 730) . For example, the network node (such as by using communication manager 150 or reception component 902, depicted in Figure 9) may receive signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter, as described above.
[0111] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.
[0112] In a first additional aspect, the second parameter is associated with a finer granularity, as compared to the first parameter, to support the RAN sharing at the cell.
[0113] In a second additional aspect, alone or in combination with the first aspect, the first parameter is a cell level IMS emergency support IE indicating whether the cell supports IMS emergency bearer services, and the second parameter is a PLMN level IMS emergency support IE indicating whether a PLMN associated with the cell supports an IMS emergency call.
[0114] In a third additional aspect, alone or in combination with one or more of the first and second aspects, process 700 includes transmitting, in accordance with the PLMN level IMS emergency support IE, signaling to establish the IMS emergency call using the PLMN.
[0115] In a fourth additional aspect, alone or in combination with one or more of the first through third aspects, a field of the PLMN level IMS emergency support IE is set to true in response to the PLMN supporting the IMS emergency call.
[0116] In a fifth additional aspect, alone or in combination with one or more of the first through fourth aspects, a field of the PLMN level IMS emergency support IE is set to false in response to the PLMN not supporting the IMS emergency call.
[0117] In a sixth additional aspect, alone or in combination with one or more of the first through fifth aspects, the PLMN level IMS emergency support IE is a list of entries, wherein an entry, in the list of entries, is associated with a PLMN in a list of PLMN identities, and the entry indicates whether the PLMN supports the IMS emergency call.
[0118] In a seventh additional aspect, alone or in combination with one or more of the first through sixth aspects, the PLMN is a public PLMN associated with the cell or a private PLMN associated with the cell.
[0119] In an eighth additional aspect, alone or in combination with one or more of the first through seventh aspects, a capability associated with using the PLMN level IMS emergency support IE is supported by a UE.
[0120] In a ninth additional aspect, alone or in combination with one or more of the first through eighth aspects, the PLMN level IMS emergency support IE is associated with PLMN identity information in the SIB.
[0121] In a tenth additional aspect, alone or in combination with one or more of the first through ninth aspects, the cell is an MOCN cell.
[0122] In an eleventh additional aspect, alone or in combination with one or more of the first through tenth aspects, the SIB is a SIB1.
[0123] Although Figure 7 shows example blocks of process 700, in some aspects, process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 7. Additionally or alternatively, two or more of the blocks of process 700 may be performed in parallel.
[0124] Figure 8 is a diagram of an example apparatus 800 for wireless communication that supports indicating parameters associated with RAN sharing at a cell in accordance with the present disclosure. The apparatus 800 may be a UE, or a UE may include the apparatus 800. In some aspects, the apparatus 800 includes a reception component 802, a transmission component 804, and a communication manager 140, which may be in communication with one another (for example, via one or more buses) . As shown, the apparatus 800 may communicate with another apparatus 806 (such as a UE, a network node, or another wireless communication device) using the reception component 802 and the transmission component 804.
[0125] In some aspects, the apparatus 800 may be configured to and / or operable to perform one or more operations described herein in connection with Figure 5. Additionally or alternatively, the apparatus 800 may be configured to and / or operable to perform one or more processes described herein, such as process 600 of Figure 6. In some aspects, the apparatus 800 may include one or more components of the UE described above in connection with Figure 2.
[0126] The reception component 802 may receive communications, such as reference signals, control information, and / or data communications, from the apparatus 806. The reception component 802 may provide received communications to one or more other components of the apparatus 800, such as the communication manager 140. In some aspects, the reception component 802 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components. In some aspects, the reception component 802 may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receive processors, one or more controllers / processors, and / or one or more memories of the UE described above in connection with Figure 2.
[0127] The transmission component 804 may transmit communications, such as reference signals, control information, and / or data communications, to the apparatus 806. In some aspects, the communication manager 140 may generate communications and may transmit the generated communications to the transmission component 804 for transmission to the apparatus 806. In some aspects, the transmission component 804 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 806. In some aspects, the transmission component 804 may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, and / or one or more memories of the UE described above in connection with Figure 2. In some aspects, the transmission component 804 may be co-located with the reception component 802 in one or more transceivers.
[0128] The communication manager 140 may receive or may cause the reception component 802 to receive, via a SIB, a first parameter for a cell. The communication manager 140 may receive or may cause the reception component 802 to receive, via the SIB, a second parameter as an extension of the first parameter, wherein the second parameter is associated with a finer granularity, as compared to the first parameter, to support RAN sharing at the cell. In some aspects, the communication manager 140 may perform one or more operations described elsewhere herein as being performed by one or more components of the communication manager 140.
[0129] The communication manager 140 may include one or more controllers / processors, and / or one or more memories of the UE described above in connection with Figure 2. In some aspects, the communication manager 140 includes a set of components. Alternatively, the set of components may be separate and distinct from the communication manager 140. In some aspects, one or more components of the set of components may include or may be implemented within one or more controllers / processors, and / or one or more memories of the UE described above in connection with Figure 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.
[0130] The reception component 802 may receive, via a SIB, a first parameter for a cell. The reception component 802 may receive, via the SIB, a second parameter as an extension of the first parameter, wherein the second parameter is associated with a finer granularity, as compared to the first parameter, to support RAN sharing at the cell. The transmission component 804 may transmit, in accordance with the PLMN level IMS emergency support IE, signaling to establish the IMS emergency call using the PLMN.
[0131] The number and arrangement of components shown in Figure 8 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Figure 8. Furthermore, two or more components shown in Figure 8 may be implemented within a single component, or a single component shown in Figure 8 may be implemented as multiple, distributed components. Additionally or alternatively, a set of (one or more) components shown in Figure 8 may perform one or more functions described as being performed by another set of components shown in Figure 8.
[0132] Figure 9 is a diagram of an example apparatus 900 for wireless communication that supports indicating parameters associated with RAN sharing at a cell in accordance with the present disclosure. The apparatus 900 may be a network node, or a network node may include the apparatus 900. In some aspects, the apparatus 900 includes a reception component 902, a transmission component 904, and a communication manager 150, which may be in communication with one another (for example, via one or more buses) . As shown, the apparatus 900 may communicate with another apparatus 906 (such as a UE, a network node, or another wireless communication device) using the reception component 902 and the transmission component 904.
[0133] In some aspects, the apparatus 900 may be configured to and / or operable to perform one or more operations described herein in connection with Figure 5. Additionally or alternatively, the apparatus 900 may be configured to and / or operable to perform one or more processes described herein, such as process 700 of Figure 7. In some aspects, the apparatus 900 may include one or more components of the network node described above in connection with Figure 2.
[0134] The reception component 902 may receive communications, such as reference signals, control information, and / or data communications, from the apparatus 906. The reception component 902 may provide received communications to one or more other components of the apparatus 900, such as the communication manager 150. In some aspects, the reception component 902 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components. In some aspects, the reception component 902 may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receive processors, one or more controllers / processors, and / or one or more memories of the network node described above in connection with Figure 2.
[0135] The transmission component 904 may transmit communications, such as reference signals, control information, and / or data communications, to the apparatus 906. In some aspects, the communication manager 150 may generate communications and may transmit the generated communications to the transmission component 904 for transmission to the apparatus 906. In some aspects, the transmission component 904 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 906. In some aspects, the transmission component 904 may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, and / or one or more memories of the network node described above in connection with Figure 2. In some aspects, the transmission component 904 may be co-located with the reception component 902 in one or more transceivers.
[0136] The communication manager 150 may transmit or may cause the transmission component 904 to transmit, via a SIB, a first parameter for a cell. The communication manager 150 may transmit or may cause the transmission component 904 to transmit, via the SIB, a second parameter as an extension of the first parameter, wherein the second parameter is associated with a finer granularity, as compared to the first parameter, to support RAN sharing at the cell. In some aspects, the communication manager 150 may perform one or more operations described elsewhere herein as being performed by one or more components of the communication manager 150.
[0137] The communication manager 150 may include one or more controllers / processors, one or more memories, one or more schedulers, and / or one or more communication units of the network node described above in connection with Figure 2. In some aspects, the communication manager 150 includes a set of components. Alternatively, the set of components may be separate and distinct from the communication manager 150. In some aspects, one or more components of the set of components may include or may be implemented within one or more controllers / processors, one or more memories, one or more schedulers, and / or one or more communication units of the network node described above in connection with Figure 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.
[0138] The transmission component 904 may transmit, via a SIB, a first parameter for a cell. The transmission component 904 may transmit, via the SIB, a second parameter as an extension of the first parameter, wherein the second parameter is associated with a finer granularity, as compared to the first parameter, to support RAN sharing at the cell. The transmission component 904 may transmit, in accordance with the PLMN level IMS emergency support IE, signaling to establish the IMS emergency call using the PLMN.
[0139] The number and arrangement of components shown in Figure 9 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Figure 9. Furthermore, two or more components shown in Figure 9 may be implemented within a single component, or a single component shown in Figure 9 may be implemented as multiple, distributed components. Additionally or alternatively, a set of (one or more) components shown in Figure 9 may perform one or more functions described as being performed by another set of components shown in Figure 9.
[0140] The following provides an overview of some Aspects of the present disclosure:
[0141] Aspect 1: A method of wireless communication performed at a user equipment (UE) , comprising: receiving, via a system information block (SIB) , a first parameter for a cell, wherein the first parameter is a cell level parameter associated with Internet Protocol multimedia subsystem (IMS) emergency calling; receiving, via the SIB, a second parameter that supports radio access network (RAN) sharing at the cell, wherein the second parameter is a public land mobile network (PLMN) level parameter associated with IMS emergency calling; and transmitting signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.
[0142] Aspect 2: The method of Aspect 1, wherein the second parameter is associated with a finer granularity, as compared to the first parameter, to support the RAN sharing at the cell.
[0143] Aspect 3: The method of any of Aspects 1-2, wherein: the first parameter is a cell level IMS emergency support information element (IE) indicating whether the cell supports IMS emergency bearer services; and the second parameter is a PLMN level IMS emergency support IE indicating whether a PLMN associated with the cell supports an IMS emergency call.
[0144] Aspect 4: The method of Aspect 3, further comprising: selecting the PLMN in accordance with the PLMN level IMS emergency support IE; and transmitting, in accordance with the PLMN level IMS emergency support IE, the signaling to establish the IMS emergency call using the PLMN.
[0145] Aspect 5: The method of Aspect 3, wherein a field of the PLMN level IMS emergency support IE is set to true in response to the PLMN supporting the IMS emergency call.
[0146] Aspect 6: The method of Aspect 3, wherein a field of the PLMN level IMS emergency support IE is set to false in response to the PLMN not supporting the IMS emergency call.
[0147] Aspect 7: The method of Aspect 3, wherein the PLMN level IMS emergency support IE is a list of entries, wherein an entry, in the list of entries, is associated with a PLMN in a list of PLMN identities, and the entry indicates whether the PLMN supports the IMS emergency call.
[0148] Aspect 8: The method of Aspect 3, wherein the PLMN is a public PLMN associated with the cell or a private PLMN associated with the cell.
[0149] Aspect 9: The method of Aspect 3, wherein a capability associated with using the PLMN level IMS emergency support IE is supported by the UE.
[0150] Aspect 10: The method of Aspect 3, wherein the PLMN level IMS emergency support IE is associated with PLMN identity information in the SIB.
[0151] Aspect 11: The method of any of Aspects 1-10, wherein the cell is a multiple operator core network (MOCN) cell.
[0152] Aspect 12: The method of any of Aspects 1-11, wherein the SIB is a SIB type 1 (SIB1) .
[0153] Aspect 13: A method of wireless communication performed at a network node, comprising: transmitting, via a system information block (SIB) , a first parameter for a cell, wherein the first parameter is a cell level parameter associated with Internet Protocol multimedia subsystem (IMS) emergency calling; transmitting, via the SIB, a second parameter that supports radio access network (RAN) sharing at the cell, wherein the second parameter is a public land mobile network (PLMN) level parameter associated with IMS emergency calling; and receiving signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.
[0154] Aspect 14: The method of Aspect 13, wherein the second parameter is associated with a finer granularity, as compared to the first parameter, to support the RAN sharing at the cell.
[0155] Aspect 15: The method of any of Aspects 13-14, wherein: the first parameter is a cell level IMS emergency support information element (IE) indicating whether the cell supports IMS emergency bearer services; and the second parameter is a PLMN level IMS emergency support IE indicating whether a PLMN associated with the cell supports an IMS emergency call.
[0156] Aspect 16: The method of Aspect 15, further comprising: transmitting, in accordance with the PLMN level IMS emergency support IE, the signaling to establish the IMS emergency call using the PLMN.
[0157] Aspect 17: The method of Aspect 15, wherein a field of the PLMN level IMS emergency support IE is set to true in response to the PLMN supporting the IMS emergency call.
[0158] Aspect 18: The method of Aspect 15, wherein a field of the PLMN level IMS emergency support IE is set to false in response to the PLMN not supporting the IMS emergency call.
[0159] Aspect 19: The method of Aspect 15, wherein the PLMN level IMS emergency support IE is a list of entries, wherein an entry, in the list of entries, is associated with a PLMN in a list of PLMN identities, and the entry indicates whether the PLMN supports the IMS emergency call.
[0160] Aspect 20: The method of Aspect 15, wherein the PLMN is a public PLMN associated with the cell or a private PLMN associated with the cell.
[0161] Aspect 21: The method of Aspect 15, wherein a capability associated with using the PLMN level IMS emergency support IE is supported by a user equipment (UE) .
[0162] Aspect 22: The method of Aspect 15, wherein the PLMN level IMS emergency support IE is associated with PLMN identity information in the SIB.
[0163] Aspect 23: The method of any of Aspects 13-22, wherein the cell is a multiple operator core network (MOCN) cell.
[0164] Aspect 24: The method of any of Aspects 13-23, wherein the SIB is a SIB type 1 (SIB1) .
[0165] Aspect 25: An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 1-12.
[0166] Aspect 26: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 1-12.
[0167] Aspect 27: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-12.
[0168] Aspect 28: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 1-12.
[0169] Aspect 29: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-12.
[0170] Aspect 30: A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 1-12.
[0171] Aspect 31: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 1-12.
[0172] Aspect 32: An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 13-24.
[0173] Aspect 33: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 13-24.
[0174] Aspect 34: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 13-24.
[0175] Aspect 35: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 13-24.
[0176] Aspect 36: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 13-24.
[0177] Aspect 37: A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 13-24.
[0178] Aspect 38: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 13-24.
[0179] The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.
[0180] As used herein, the term “component” is intended to be broadly construed as hardware or a combination of hardware and software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware or a combination of hardware and software. It will be apparent that systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems or methods is not limiting of the aspects. Thus, the operation and behavior of the systems or methods are described herein without reference to specific software code, because those skilled in the art will understand that software and hardware can be designed to implement the systems or methods based, at least in part, on the description herein.
[0181] As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples.
[0182] As used herein, the term “determine” or “determining” encompasses a wide variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , identifying, inferring, ascertaining, measuring, and the like. Also, “determining” can include receiving (such as receiving information or receiving an indication) , accessing (such as accessing data stored in memory) , transmitting (such as transmitting information) and the like. Also, “determining” can include resolving, selecting, obtaining, choosing, establishing and other such similar actions. The term “identify” or “identifying” also encompasses a wide variety of actions and, therefore, “identifying” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , inferring, ascertaining, measuring, and the like. Also, “identifying” can include receiving (such as receiving information or receiving an indication) , accessing (such as accessing data stored in memory) , transmitting (such as transmitting information) and the like. Also, “identifying” can include resolving, selecting, obtaining, choosing, establishing and other such similar actions.
[0183] Even though particular combinations of features are recited in the claims or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features may be combined in ways not specifically recited in the claims or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination with multiples of the same element (for example, a + a, a + a + a, a + a + b, a + a + c, a +b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c) .
[0184] No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more. ” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” and similar terms are intended to be open-ended terms that do not limit an element that they modify (for example, an element “having” A may also have B) . Further, as used herein, “based on” is intended to be interpreted in the inclusive sense, unless otherwise explicitly indicated. For example, “based on” may be used interchangeably with “based at least in part on, ” “associated with” , or “in accordance with” unless otherwise explicitly indicated. Specifically, unless a phrase refers to “based on only ‘a, ’ ” or the equivalent in context, whatever it is that is “based on ‘a, ’ ” or “based at least in part on ‘a, ’ ” may be based on “a” alone or based on a combination of “a” and one or more other factors, conditions or information. . Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or, ” unless explicitly stated otherwise (for example, if used in combination with “either” or “only one of” ) .
Claims
1.An apparatus for wireless communication at a user equipment (UE) , comprising:one or more memories storing processor-executable code; andone or more processors coupled with the one or more memories, at least one processor of the one or more processors configured to cause the UE to:receive, via a system information block (SIB) , a first parameter for a cell, wherein the first parameter is a cell level parameter associated with Internet Protocol multimedia subsystem (IMS) emergency calling;receive, via the SIB, a second parameter that supports radio access network (RAN) sharing at the cell, wherein the second parameter is a public land mobile network (PLMN) level parameter associated with IMS emergency calling; andtransmit signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.2.The apparatus of claim 1, wherein the second parameter is associated with a finer granularity, as compared to the first parameter, to support the RAN sharing at the cell.3.The apparatus of claim 1, wherein:the first parameter is a cell level IMS emergency support information element (IE) indicating whether the cell supports IMS emergency bearer services; andthe second parameter is a PLMN level IMS emergency support IE indicating whether a PLMN associated with the cell supports an IMS emergency call.4.The apparatus of claim 3, wherein the at least one processor is further configured to cause the UE to:select the PLMN in accordance with the PLMN level IMS emergency support IE; andtransmit, in accordance with the PLMN level IMS emergency support IE, the signaling to establish the IMS emergency call using the PLMN.5.The apparatus of claim 3, wherein a field of the PLMN level IMS emergency support IE is set to true in response to the PLMN supporting the IMS emergency call.6.The apparatus of claim 3, wherein a field of the PLMN level IMS emergency support IE is set to false in response to the PLMN not supporting the IMS emergency call.7.The apparatus of claim 3, wherein the PLMN level IMS emergency support IE is a list of entries, wherein an entry, in the list of entries, is associated with a PLMN in a list of PLMN identities, and the entry indicates whether the PLMN supports the IMS emergency call.8.The apparatus of claim 3, wherein the PLMN is a public PLMN associated with the cell or a private PLMN associated with the cell.9.The apparatus of claim 1, wherein the cell is a multiple operator core network (MOCN) cell.10.The apparatus of claim 1, wherein the SIB is a SIB type 1 (SIB1) .11.A method of wireless communication performed at a user equipment (UE) , comprising:receiving, via a system information block (SIB) , a first parameter for a cell, wherein the first parameter is a cell level parameter associated with Internet Protocol multimedia subsystem (IMS) emergency calling;receiving, via the SIB, a second parameter that supports radio access network (RAN) sharing at the cell, wherein the second parameter is a public land mobile network (PLMN) level parameter associated with IMS emergency calling; andtransmitting signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.12.The method of claim 11, wherein the second parameter is associated with a finer granularity, as compared to the first parameter, to support the RAN sharing at the cell.13.The method of claim 11, wherein:the first parameter is a cell level IMS emergency support information element (IE) indicating whether the cell supports IMS emergency bearer services; andthe second parameter is a PLMN level IMS emergency support IE indicating whether a PLMN associated with the cell supports an IMS emergency call.14.The method of claim 13, wherein a capability associated with using the PLMN level IMS emergency support IE is supported by the UE.15.The method of claim 13, wherein the PLMN level IMS emergency support IE is associated with PLMN identity information in the SIB.16.An apparatus for wireless communication at a network node, comprising:one or more memories storing processor-executable code; andone or more processors coupled with the one or more memories, at least one processor of the one or more processors configured to cause the network node to:transmit, via a system information block (SIB) , a first parameter for a cell, wherein the first parameter is a cell level parameter associated with Internet Protocol multimedia subsystem (IMS) emergency calling;transmit, via the SIB, a second parameter that supports radio access network (RAN) sharing at the cell, wherein the second parameter is a public land mobile network (PLMN) level parameter associated with IMS emergency calling; andreceive signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.17.The apparatus of claim 16, wherein the second parameter is associated with a finer granularity, as compared to the first parameter, to support the RAN sharing at the cell.18.The apparatus of claim 16, wherein:the first parameter is a cell level IMS emergency support information element (IE) indicating whether the cell supports IMS emergency bearer services; andthe second parameter is a PLMN level IMS emergency support IE indicating whether a PLMN associated with the cell supports an IMS emergency call.19.The apparatus of claim 18, wherein a capability associated with using the PLMN level IMS emergency support IE is supported by a user equipment (UE) .20.The apparatus of claim 18, wherein the PLMN level IMS emergency support IE is associated with PLMN identity information in the SIB.21.The apparatus of claim 18, wherein a field of the PLMN level IMS emergency support IE is set to true in response to the PLMN supporting the IMS emergency call.22.The apparatus of claim 18, wherein a field of the PLMN level IMS emergency support IE is set to false in response to the PLMN not supporting the IMS emergency call.23.The apparatus of claim 18, wherein the PLMN level IMS emergency support IE is a list of entries, wherein an entry, in the list of entries, is associated with a PLMN in a list of PLMN identities, and the entry indicates whether the PLMN supports the IMS emergency call.24.The apparatus of claim 18, wherein the PLMN is a public PLMN associated with the cell or a private PLMN associated with the cell.25.The apparatus of claim 16, wherein the cell is a multiple operator core network (MOCN) cell.26.A method of wireless communication performed at a network node, comprising:transmitting, via a system information block (SIB) , a first parameter for a cell, wherein the first parameter is a cell level parameter associated with Internet Protocol multimedia subsystem (IMS) emergency calling;transmitting, via the SIB, a second parameter that supports radio access network (RAN) sharing at the cell, wherein the second parameter is a public land mobile network (PLMN) level parameter associated with IMS emergency calling; andreceiving signaling to establish an IMS emergency call using one or more of the first parameter or the second parameter.27.The method of claim 26, wherein the second parameter is associated with a finer granularity, as compared to the first parameter, to support the RAN sharing at the cell.28.The method of claim 26, wherein:the first parameter is a cell level IMS emergency support information element (IE) indicating whether the cell supports IMS emergency bearer services; andthe second parameter is a PLMN level IMS emergency support IE indicating whether a PLMN associated with the cell supports an IMS emergency call.29.The method of claim 28, further comprising:receiving, in accordance with the PLMN level IMS emergency support IE, signaling to establish the IMS emergency call using the PLMN.30.The method of claim 26, wherein the SIB is a SIB type 1 (SIB1) .
Citation Information
Patent Citations
Apparatus and method for mobile telecommunications system
CN110100482A
Systems and methods to indicate emergency services support for roaming users
US20220312182A1
Handling of emergency services for non-public networks
WO2020202078A1