Essential SIB design in 6g
A split SIB design into common and dedicated components addresses power consumption issues in 5G networks by reducing redundant SIB broadcasts and acquisitions, enhancing resource efficiency and power savings.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2026-04-02
AI Technical Summary
The existing essential SIB design in 5G wireless communication systems leads to increased power consumption on both network and UE sides due to the mandatory periodic broadcast of MIB and SIB1, regardless of UE presence, and requires frequent SIB acquisition by UEs upon cell change.
Implement a split SIB design, dividing SIB1 into a common SIB (C-SIB1) valid across multiple cells and a dedicated SIB (D-SIB1) specific to each cell, allowing for reduced transmission frequency and targeted SIB acquisition based on UE needs.
This approach reduces unnecessary system information acquisition, enhances resource utilization, and decreases power consumption by optimizing SIB transmission and acquisition processes.
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Figure CN2024121897_02042026_PF_FP_ABST
Abstract
Description
ESSENTIAL SIB DESIGN IN 6GTECHNICAL FIELD
[0001] This application relates generally to wireless communication systems, including transmission of the content of the essential system information blocks (SIB1) .BACKGROUND
[0002] Wireless mobile communication technology uses various standards and protocols to transmit data between a base station and a wireless communication device. Wireless communication system standards and protocols can include, for example, 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) (e.g., 4G) , 3GPP New Radio (NR) (e.g., 5G) , and Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard for Wireless Local Area Networks (WLAN) (commonly known to industry groups as ) .
[0003] As contemplated by the 3GPP, different wireless communication systems' standards and protocols can use various radio access networks (RANs) for communicating between a base station of the RAN (which may also sometimes be referred to generally as a RAN node, a network node, or simply a node) and a wireless communication device known as a user equipment (UE) . 3GPP RANs can include, for example, Global System for Mobile communications (GSM) , Enhanced Data Rates for GSM Evolution (EDGE) RAN (GERAN) , Universal Terrestrial Radio Access Network (UTRAN) , Evolved Universal Terrestrial Radio Access Network (E-UTRAN) , and / or Next-Generation Radio Access Network (NG-RAN) .
[0004] Each RAN may use one or more radio access technologies (RATs) to perform communication between the base station and the UE. For example, the GERAN implements GSM and / or EDGE RAT, the UTRAN implements Universal Mobile Telecommunication System (UMTS) RAT or other 3GPP RAT, the E-UTRAN implements LTE RAT (sometimes simply referred to as LTE) , and NG-RAN implements NR RAT (sometimes referred to herein as 5G RAT, 5G NR RAT, or simply NR) . In certain deployments, the E-UTRAN may also implement NR RAT. In certain deployments, NG-RAN may also implement LTE RAT.
[0005] A base station used by a RAN may correspond to that RAN. One example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly denoted as evolved Node B, enhanced Node B, eNodeB, or eNB) . One example of an NG-RAN base station is a next generation Node B (also sometimes referred to as a g Node B or gNB) .
[0006] A RAN provides its communication services with external entities through its connection to a core network (CN) . For example, E-UTRAN may utilize an Evolved Packet Core (EPC) while NG-RAN may utilize a 5G Core Network (5GC) .
[0007] BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0008] To easily identify the discussion of any particular element or act, the most significant digit or digits in a reference number refer to the figure number in which that element is first introduced.
[0009] FIG. 1 illustrates a table that describes different categories of SI according to 5G NR Design.
[0010] FIG. 2A illustrates a signal flow diagram of a UE using a Msg1 based RACH procedure for an on demand SI request in accordance with some embodiments.
[0011] FIG. 2B illustrates a signal flow diagram of a UE using a Msg3 based RACH procedure for an on demand SI request in accordance with some embodiments.
[0012] FIG. 3 illustrates an example network diagram where a common SI is used across an area in accordance with some embodiments.
[0013] FIG. 4 illustrates an example signal flow diagram where a UE in RRC connected mode requests an on demand SIB in accordance with some embodiments.
[0014] FIG. 5 illustrates an aspect of the subject matter in accordance with one embodiment.
[0015] FIG. 6 includes a table illustrating an example split of the essential SIB into a reference SIB and a Delta SIB that is a subset of the reference SIB in accordance with some embodiments.
[0016] FIG. 7 includes a table illustrating an example split of the essential SIB into a reference SIB and a Delta SIB, where the Delta SIB includes a configuration that is not provided in the reference SIB in accordance with some embodiments.
[0017] FIG. 8 includes a first example of a table illustrating an example split of the essential SIB into a reference SIB and a Delta SIB, where content is split between the reference SIB and the Delta SIB based on the purpose of the content in accordance with some embodiments.
[0018] FIG. 9 includes a second example of a table illustrating an example split of the essential SIB into a reference SIB and a Delta SIB, where content is split between the reference SIB and the Delta SIB based on the purpose of the content in accordance with some embodiments.
[0019] FIG. 10 illustrates an example network diagram of a hetnet deployment scenario in accordance with some embodiments.
[0020] FIG. 11 illustrates an example signal flow diagram where both C-SIB1 and D-SIB1 are considered by the UE during cell selection or cell reselection in accordance with some embodiments.
[0021] FIG. 12 illustrates an example signal flow diagram where only C-SIB1 is considered by the UE during cell selection or cell reselection in accordance with some embodiments.
[0022] FIG. 13 illustrates an example signal flow diagram where the D-SIB1 is provided in an on-demand SIB provisioning method in accordance with some embodiments.
[0023] FIG. 14 illustrates an example signal flow diagram where the D-SIB1 is provided as a response to a UE uplink request in accordance with some embodiments.
[0024] FIG. 15 illustrates a method for a UE, according to embodiments herein.
[0025] FIG. 16 illustrates a method for a network node, according to embodiments herein.
[0026] FIG. 17 illustrates an example architecture of a wireless communication system, according to embodiments disclosed herein.
[0027] FIG. 18 illustrates a system for performing signaling between a wireless device and a network device, according to embodiments disclosed herein.DETAILED DESCRIPTION
[0028] Various embodiments are described with regard to a UE. However, reference to a User Equipment (UE) is merely provided for illustrative purposes. The example embodiments may be utilized with any electronic component that may establish a connection to a network and is configured with the hardware, software, and / or firmware to exchange information and data with the network. Therefore, the UE as described herein is used to represent any appropriate electronic component.
[0029] In 3GPP wireless communication systems, system information (SI) refers to data broadcast by the network to UEs in a cell. This information allows UEs to connect to the network and initiate communication, enabling operations like cell selection, mobility, and more. While embodiments herein refer to System Information Block Type 1 (SIB1) , a common SIB (C-SIB1) , and a dedicated SIB (D-SIB1) , the naming of these SIBs may be altered based on implementation (e.g., SIB#X, SIB#Y) .
[0030] FIG. 1 illustrates a table 102 that describes different categories of SI according to 5G NR Design. As shown, the SI may be divided into two categories: minimum SI 104 and other SI 106. Minimum SI 104 may include pieces of data used by a UE to access the network. For example, minimum SI 104 may include a Master Information Block (MIB) 108 and a System Information Block Type 1 (SIB1) 110.
[0031] The MIB 108 may be transmitted over the Physical Broadcast Channel (PBCH) . The MIB 108 may include basic information to initiate the connection process. For example, the MIB 108 may include a System Frame Number (SFN) , scheduling information for SIB1, and cell barring and intra-frequency reselection information.
[0032] The SIB1 110 may include additional information that may be used by the UE to access the network. The SIB1 110 may be transmitted over the Physical Downlink Shared Channel (PDSCH) . The SIB1 110 may include information related to cell selection, initial access, cell access, and scheduling information for other SI.
[0033] The minimum SI 104 is periodically broadcast. For example, in some embodiments, a network node may transmit the minimum SI 104 every 40 milliseconds. This periodic broadcast may be used to allow UEs in the cell.
[0034] The other SI 106 may be periodically broadcast or broadcast on demand based on a UE request. The other SI 106 may include further details about the network, mobility management, configuration parameters, and services available in the cell.
[0035] There may be two ways to provide SI. A first way to provide SI may be a periodical broadcast. For example, a network node may broadcast the SI at a certain interval (e.g., 40 milliseconds) . A second way to provide the SI is an on demand SI request. For example, a UE may send a request for a SIB, and the network node may broadcast the requested SIB. In some embodiments, the on demand SI request may be requested using Msg1 based Random Access Channel (RACH) procedure. In some embodiments, the on demand SI request may be requested using Msg3 based Random Access Channel (RACH) procedure.
[0036] FIG. 2A illustrates a signal flow diagram 206 of a UE 202 using a Msg1 based RACH procedure for an on demand SI request in accordance with some embodiments. The network node 204 may associate dedicated PRACH preambles to specific SIB (s) and send the association to the UE 202 via a SIB1. As shown, the UE 202 may select 208 a PRACH preamble associated with a desired SIB. The UE 202 may send the random access preamble 210 that is associated with the desired SIB to the network node 204
[0037] The network node 204 may send a random access response 212 to the UE 202 to indicate to the UE 202 that the random access preamble 210 was received. The network node 204 may also transmit 214 the requested SIB (s) in the following broadcast. The UE 202 may monitor for the requested SIB according to the normal broadcast scheme.
[0038] FIG. 2B illustrates a signal flow diagram 216 of a UE 218 using a Msg3 based RACH procedure for an on demand SI request in accordance with some embodiments. The UE 218 may send a random access preamble 222 to the network node 220. The network node 220 may send a random access response 224 to the UE 218 to indicate to the UE 218 that the random access preamble 222 was received.
[0039] The UE 218 may transmit a system information request 226 that indicates the SIB (s) that the UE 218 wants. The network node 220 may send a system information response 228 to indicate that it received the system information request 226. Then network node 220 may also transmit 230 the requested SIB (s) in the following broadcast. The UE 218 may monitor for the requested SIB according to the normal broadcast scheme.
[0040] FIG. 3 illustrates an example network diagram 302 where a common SI 304 is used across an area in accordance with some embodiments. In some embodiments, some SI is shared across multiple cells within a geographical area (system information area) . This may allow the network to define area-SIBs, meaning certain system information is valid for all cells within a specific area, reducing redundancy in broadcasting SI across all cells.
[0041] Area-specific SIBs may include system information that is applicable across a set of cells within the same system information area (SIA) . In some embodiments, a Tracking Area Code (TAC) and a System Information Area ID (SIAID) may be used to define the rules for validity of stored area-specific SIBs. To determine whether the system information stored by the UE is still valid when it moves to a new cell, in some embodiments if both the TAC and SIAID remain unchanged, the UE can continue using the stored system information for the new cell.
[0042] Since system information can be shared across multiple cells, the network avoids broadcasting the same SIBs repeatedly for each cell. UEs can store and reuse the SIBs, reducing the need for frequent SI requests. UEs moving within the same area can maintain access to critical network information without needing constant updates, improving mobility and reducing connection setup times.
[0043] The use of a common SI 304 is not applicable to minimum SI. The minimum SI may still be periodically broadcast by each cell. One or more of the other SI may be included as a common SI.
[0044] In release 15 (Rel-15) of 3GPP, the UE request for on demand SI acquisition was for and Idle / Inactive UE. Further the design in Rel-15 uses MSG1 / MSG3 (Common Control Channel (CCCH) ) based request, and the request is made per SI. Further, in Rel-15 the SIB was transmitted by the network node via broadcast only. Rel-16 extended the use of on demand SI acquisition to UEs in connected mode. A UE may send a SI request via a Dedicated SIB Request message (Dedicated Control Channel (DCCH) ) . The request may be per SIB. The network may provide the SI via Radio Resource Control (RRC) reconfiguration if no Common Search Space (CSS) is configured on an activated bandwidth part and via broadcast.
[0045] For example, FIG. 4 illustrates an example signal flow diagram 406 where a UE 402 in RRC connected mode requests an on demand SIB in accordance with some embodiments. As shown, the UE 402 and the network node 404 may be RRC connected. If the UE 402 desires to receive an on demand SIB, the UE 402 may send a SIB request 408 to the network node 404 that identifies the desired SIB. The SIB request 408 may be sent via uplink dedicated signaling.
[0046] The network node 404 may reply to the UE 402 by sending the UE 402 an RRC reconfiguration 410 that includes SI. The SI included in the RRC reconfiguration 410 may include the SI that was requested by the UE in the SIB request 408. In some embodiments, the network node 404 may also send a broadcast of the SI 412.
[0047] For 6G networks, there is an emphasis on power saving. It is desirable for a 6G network to be designed as a green network and feature native power savings. The power saving design may be supported from both he UE and network side.
[0048] However, the characteristics of the essential SIB design from 5G may result in more power consumption than is desirable. From the network side, the minimum SI (MIB and SIB1) is mandatory to be periodically broadcasted per cell. This has an impact on network power consumption as the network always transmits the MIB / SIB1 regardless of whether there are UEs.
[0049] Similarly, the essential SIB design from 5G may have an impact on the power consumption of the UE side. For example, the UE may be required to acquire the MIB and SIB1 after each cell change. Without valid MIB and SIB1 acquisition in each camping / selected cell, UE cannot camp on there, and cannot perform initial access there. This may have an impact on UE power consumption as the UE always acquires the SIB per cell change even though most configuration may be the same across cells.
[0050] Accordingly, an embodiment with a new essential system information design is desirable. Embodiments herein provide a new essential system information design that may improve the resource utilization of system information transmission, and avoid the unnecessary system information acquisition in UE side.
[0051] In some embodiments, the essential SIB (i.e., SIB1) may be split into two parts. A first part may be a common SIB (i.e., C-SIB1) and a second part may be a dedicated SIB (i.e., D-SIB1) . The common SIB may include system information configuration that is valid across multiple cells. The dedicated SIB may include a configuration specific for one specific cell.
[0052] For the essential SIB, some embodiments may use a common SIB and dedicated SIB design with the following elements. In some embodiments, the common SIB (i.e., C-SIB1) may support SI area concept for C-SIB1 transmission. The validity of the C-SIB1 may be across cells in the same area. If the UE is required to camp on one cell, the UE may at least have the valid C-SIB1.
[0053] In some embodiments the dedicated SIB (i.e., D-SIB1) may be specific to one cell. For example, the validity of D-SIB1 may be only within the current cell. If the valid D-SIB1 is only related to the initial access, the UE can acquire the D-SIB1 after camping the cell before performing initial access.
[0054] In some embodiments, both the Common SIB and Dedicated SIB can be provided via periodical transmission or on-demand transmission. For on-demand transmission, the UE request design for common SIB and dedicated SIB can be sent in a joint way or a separate way.
[0055] There are multiple ways that embodiments may split the SIB1 between the C-SIB and the D-SIB. In a first option, the network may split the SIB1 into a reference SIB1 (e.g., C-SB1) and a delta SIB1 (D-SIB1) . This first option may have the benefit that when the C-SIB is same across the cells in one area, the signaling transmission load (e.g., the transmission frequency) may decrease.
[0056] For example, FIG. 5 includes a table 502 illustrating an example split of the essential SIB into a reference SIB and a Delta SIB in accordance with some embodiments. Specifically, table 502 uses SIB1 as an example of how a reference SIB1 (C-SIB1 504) and a Delta SIB1 (D-SIB1 506) may be delineated.
[0057] The C-SIB1 504 may be the reference SIB1 message. The C-SIB1 504 may include the whole SIB1 message and the area information. For example, as shown, the C-SIB1 504 may include cell selection information, SI scheduling information, cell access information, access control information, a common configuration, and service information. The C-SIB1 504 may also include area information for the area that the C-SIB1 504 is valid.
[0058] The D-SIB1 506 may be a delta SIB1. The D-SIB1 506 may indicate the parts of the SIB1 that are different than other cells. The fields in the D-SIB1 506 may indicate the delta part on top of the C-SIB1 504. In other words, the D-SIB1 506 includes changes that can be applied to the C-SIB1 504 to determine the full set of the essential SIB of the current cell. The changes may be a difference between a parameter for the current cell and the common parameter, or a replacement parameter that is to be used for the current cell instead of the common parameter. For example, the UE may receive the D-SIB1 506, apply the changes indicated in the D-SIB1 506 to the C-SIB1 504, and use the resulting SIB1 elements to establish a connection with the network node.
[0059] In some embodiments, if one cell has no different SIB1 configuration compared to the reference SIB1 (C-SIB1 504) , the network may not provide the D-SIB1 506. For example, the UE may use the parameters included in the C-SIB1 504 to establish a connection with a network node if the network does not provide the D-SIB1 506.
[0060] In some embodiments, the network may indicate the presence of D-SIB1 506 in MIB. If the network indicates that the D-SIB1 506 is available, the UE may monitor for the D-SIB1 506 and apply the delta parameters to the C-SIB1 504.
[0061] In some embodiments, the UE may assume the D-SIB1 506 and the C-SIB1 504 have the same format. C-SIB1 506 may be the full configuration, and D-SIB1 506 may be the delta configuration based on C-SIB1. The delta configuration may indicate changes to one or more parameters in the C-SIB1 506 that the UE may apply to generate a SIB for the current cell. In some embodiments, if the D-SIB1 506 content impacts the paging reception, or measurement, the UE may be required to acquire it after cell change immediately. In some embodiments, the network may also indicate whether the UE is required to acquire D-SIB1 506 immediately.
[0062] Some embodiments may use a second option to split the SIB1. In the second option, D-SIB is a subset of C-SIB. In such embodiments, the overhead and power consumption may be reduced if only some subsets that are not common across cells are used in D-SIB, and not all the parts are changed. For example, FIG. 6 includes a table 602 illustrating an example split of the essential SIB into a reference SIB and a Delta SIB that is a subset of the reference SIB in accordance with some embodiments. Specifically, table 602 illustrates an example of a reference SIB1 (C-SIB1 604) and a Delta SIB1 (D-SIB1 606) that is a subset of the reference SIB1.
[0063] The C-SIB1 604 may be the reference SIB1 message. The C-SIB1 604 may include the whole SIB1 message and the area information. For example, as shown, the C-SIB1 604 may include cell selection information, SI scheduling information, cell access information, access control information, a common configuration, and service information. The C-SIB1 604 may also include area information for the area that the C-SIB1 604 is valid.
[0064] The D-SIB1 606 may be a delta of a subset of SIB1 parameters. Unlike D-SIB1 506 of FIG. 5, in the embodiment shown in FIG. 6 the network only provides a subset of the C-SIB1 parameters in D-SIB1 606. The parameters of the subset can be provided in delta configuration or in the full configuration.
[0065] In the illustrated example, the network is only allowed to provide the configuration of the common configuration (servingCellConfigCommon) in D-SIB1 606. Note that this is one example of a subset. Other embodiments may allow the network to send different subsets that include one or more of the fields of C-SIB1 604 in the D-SIB1 606. The UE may receive the D-SIB1 606, apply the changes indicated in the D-SIB1 606 to the C-SIB1 604, and use the resulting SIB1 elements to establish a connection with the network node.
[0066] In some embodiments, if one cell has no different SIB1 configuration compared to the reference SIB1 (C-SIB1 604) , the network may not provide the D-SIB1 606. For example, the UE may use the parameters included in the C-SIB1 604 to establish a connection with a network node if the network does not provide the D-SIB1 606.
[0067] In some embodiments, the network may indicate the presence of D-SIB1 606 in MIB. If the network indicates that the D-SIB1 606 is available, the UE may monitor for the D-SIB1 606 and apply the delta parameters to the C-SIB1 604.
[0068] In some embodiments, if the D-SIB1 606 content impacts the paging reception, or measurement, the UE may be required to acquire it after cell change immediately. In some embodiments, the network may also indicate whether the UE is required to acquire D-SIB1 606 immediately.
[0069] Some embodiments may use a third option to split the SIB1. In the third option, D-SIB includes a configuration which is not provided in C-SIB. Such embodiments may allow the D-SIB to include some features only supported in some specific cells (e.g., Non-Public Network (NPN) ) . For example, FIG. 7 includes a table 702 illustrating an example split of the essential SIB into a reference SIB and a Delta SIB, where the Delta SIB includes a configuration that is not provided in the reference SIB in accordance with some embodiments.
[0070] Specifically, table 702 illustrates an example of a reference SIB1 (C-SIB1 704) and a Delta SIB1 (D-SIB1 706) that provides a configuration which is not provided in C-SIB1 704. In contrast to the previous examples, in the illustrated embodiment D-SIB1 706 only provides the configuration which is not in C-SIB1 704, it can be provided in full configuration. For example, in some embodiments, the network may only be allowed to provide the new configuration of cell access information in D-SIB1 706 (e.g., to support NPN) .
[0071] The C-SIB1 704 may be the reference SIB1 message. The C-SIB1 704 may include SIB1 parameters and the area information. For example, as shown, the C-SIB1 704 may include cell selection information, SI scheduling information, cell access information, access control information, a common configuration, and service information. The C-SIB1 704 may also include area information for the area that the C-SIB1 704 is valid.
[0072] The D-SIB1 706 may include one or more parameters not included in the C-SIB1 704. Accordingly, the content in the D-SIB1 706 and the C-SIB1 704 may not overlap. In the illustrated example, the network provides a C-SIB1 704 that is valid across an area and each cell may send the D-SIB1 706 that includes parameters not included in the C-SIB1 704. In the illustrated embodiment, C-SIB1 704 provides most of the parameters, and a cell is allowed to provide a configuration of cell access information in D-SIB1 706. Specifically, in the illustrated embodiment, the network node may provide the UE with NPN parameters in the D-SIB1 706 to configure NPN support. Note that this is one example of a configuration that may be included in D-SIB1 706. Other embodiments may allow the network to send different configurations in the D-SIB1 706. The UE may receive the D-SIB1 706, apply the configuration indicated in the D-SIB1 706 in addition to the configurations in the C-SIB1 704, and use the resulting SIB1 elements to establish a connection with the network node.
[0073] In some embodiments, if one cell has no different SIB1 configuration compared to the reference SIB1 (C-SIB1 704) , the network may not provide the D-SIB1 706. In some embodiments, the network may indicate the presence of D-SIB1 706 in MIB. If the network indicates that the D-SIB1 706 is available, the UE may monitor for the D-SIB1 706.
[0074] In some embodiments, if the D-SIB1 706 content impacts the paging reception, or measurement, the UE may be required to acquire it after cell change immediately. In some embodiments, the network may also indicate whether the UE is required to acquire D-SIB1 706 immediately.
[0075] Some embodiments may use a fourth option to split the SIB1. In the fourth option, the content split between C-SIB and D-SIB is for different purposes. For example, C-SIB may include configurations for camping purpose, D-SIB may include configurations for initial access purpose. Beneficially, in the case where the camping specific C-SIB is common across cells, the UE does not need to acquire D-SIB in a cell if no initial access is triggered there. The UE may camp on different cells and obtain the D-SIB if initial access is triggered. FIG. 8 and FIG. 9 provide example embodiments where content of an SIB1 is split between a C-SIB and D-SIB is for different purposes.
[0076] Specifically, FIG. 8 includes a first example of a table 802 illustrating an example split of the essential SIB into a reference SIB (C-SIB1 804) and a Delta SIB (D-SIB1 806) , where content is split between the reference SIB and the Delta SIB based on the purpose of the content in accordance with some embodiments. In the illustrated embodiment, D-SIB1 806 only provides configuration for initial access.
[0077] The C-SIB1 804 may be the configuration related to the camping usage. For example, C-SIB1 804 may include all SIB1 configuration except RACH configuration, and Unified Access Control (UAC) . For example, as shown, the C-SIB1 804 may include cell selection information, SI scheduling information, cell access information, a common configuration (except RACH configuration) , and service information. The C-SIB1 804 may also include area information for the area that the C-SIB1 804 is valid.
[0078] The D-SIB1 806 may be the configuration related to the initial access usage. For example, the D-SIB1 806 may include RACH related configuration and UAC.
[0079] FIG. 9 includes a second example of a table 902 illustrating an example split of the essential SIB into a reference SIB (C-SIB1 904) and a Delta SIB (D-SIB1 906) , where content is split between the reference SIB and the Delta SIB based on the purpose of the content in accordance with some embodiments. In the illustrated embodiment, D-SIB1 906 only provides the configuration ID for initial access.
[0080] The C-SIB1 804 may provide the full SIB1 configuration including multiple RACH / access control (AC) configurations. For example, the C-SIB1 904 may include an access control information list 908 that includes multiple UAC configurations. The C-SIB1 904 may also include multiple RACH configurations 910. The C-SIB1 804 may also include area information for the area that the C-SIB1 804 is valid.
[0081] D-SIB1 906 may provide the RACH configuration ID 912 and a UAC ID 914 to indicate which RACH configuration and UAC configuration in C-SIB1 904 is applicable in the current cell. Accordingly, C-SIB1 904 may provide a plurality of configurations to the UE, and D-SIB1 906 may indicate to the UE which of those configurations is applicable in the current cell.
[0082] When the UE is in CONNECTED state, the network may provision the essential SIB. For example, in some embodiments during handover / cell change, if a target and source cell are in the same area, the UE only needs to acquire D-SIB, not C-SIB in target cell during or after the handover. In some embodiments the network can explicitly or implicitly indicate to the UE whether to acquire C-SIB in the target cell. The implicit way may be that the network indicates the SIB1 area information to UE in the target cell configuration. The network can provide the C-SIB and / or D-SIB via dedicated signaling to UE, and the UE may keep the C-SIB / D-SIB acquired via dedicated way and use it in IDLE / INACTIVE state.
[0083] Splitting the essential SIB may be implemented in different scenarios. In a first example scenario, the essential SIB may be split into the C-SIB1 and the D-SIB1 in a hetnet deployment scenario. FIG. 10 illustrates an example network diagram 1002 of a hetnet deployment scenario in accordance with some embodiments. As shown, the network may include a macro coverage layer comprising cell#0 1004 that overlaps a small cell coverage layer comprising cell#1 1006, cell#2 1008, cell#3 1010, and cell#4 1012. The area of C-SIB1 (i.e., the area for which the C-SIB1 is valid) may include the macro coverage layer (cell#0 1004) and the overlapped small cell coverage layer (cell#1 1006, cell#2 1008, cell#3 1010, and cell#4 1012) .
[0084] Each of cell#1 1006, cell#2 1008, cell#3 1010, and cell#4 1012 may correspond to a specific D-SIB1 comprising a specific configuration (e.g., beam width, beam, TRS configuration, and / or configuration for initial access) . Regarding network implementation, the network may provide C-SIB1 in the macro layer. In some embodiments, the network may provide the C-SIB1 in small cell layer by the on-demand way (e.g., upon request by the UE a small cell may broadcast the C-SIB1) . The network may provide D-SIB1 via each cell by on demand way. Note that if D-SIB1 is carried in MIB, D-SIB1 may be merged into the MIB, and the UE can skip step of D-SIB1 acquisition.
[0085] Regarding UE operation, the UE may acquire C-SIB1 in cell#0 1004, and acquire D-SIB1 when the UE switches access to cell#1 1006, cell#2 1008, cell#3 1010, and cell#4 1012. For example, when the UE is camping on cell#0 1004 the UE may receive C-SIB1. Then when the UE desires to initiate initial access to one of the small cells, the UE can switch to camp on the target cell (e.g., cell#1 1006) . While camping on the target cell, the UE may acquire D-SIB1 for the target cell which may provide access configuration for the UE to transmit the preamble for initial access to the target cell.
[0086] The split essential SIB may also be implemented in a non-hetnet deployment scenario. In a non-hetnet deployment, the area of the C-SIB1may be based on network deployment. Regarding network implementation, the network may provide C-SIB1 in an on-demand way or periodically broadcast. The D-SIB1 may be provided via each cell by on demand way. In some embodiments, if D-SIB1 is carried in MIB, D-SIB1 is merged into the MIB and the UE can skip step of D-SIB1 acquisition. Regarding UE operation, the UE may skip C-SIB1 acquisition if the UE has valid SIB1 in the same area. The UE may acquire D-SIB1 after camping on the cell and before initial access.
[0087] FIG. 11 and FIG. 12 illustrate example signal flow diagrams where a UE obtains a C-SIB1 and a D-SIB1. Which procedure is used may be up to network implementation. In some embodiments, the network may indicate which procedure is used.
[0088] Specifically, FIG. 11 illustrates an example signal flow diagram 1102 where both C-SIB1 1108 and D-SIB1 1110 are considered by the UE 1104 during cell selection or cell reselection in accordance with some embodiments. As shown, the UE 1104 may be in an idle / inactive state 1112.
[0089] The UE 1104 may receive a MIB 1114 from the network node 1106. The UE 1104 may receive a C-SIB1 1108 from the network node 1106. If the UE 1104 already has a C-SIB1 1108 for the area associated with the network node 1106, the UE 1104 may use the previously obtained C-SIB1 1108. For example, if the target cell is in the same C-SIB1 area as the previous cell, the UE 1104 may use the previously obtained C-SIB1 1108 and skip obtaining the C-SIB1 1108 again.
[0090] If the network node 1106 has a D-SIB1 1110, the network node 1106 may send the D-SIB1 1110 to the UE 1104. If the network node 1106 is using the configuration included in the C-SIB1 1108 without change, there may be no D-SIB1 1110.
[0091] In the illustrated embodiment, the UE considers both C-SIB1 1108 and D-SIB1 1110 during cell selection or cell reselection. The content of D-SIB1 1110 may impact the cell camping. For example, the D-SIB1 1110 may include cell access information and paging reception configuration. The UE 1104 may obtain the essential SIB configuration by combining the information in the C-SIB1 1108 and the D-SIB1 1110 to determine if the UE 1104 can camp 1116 on the cell or not. Thus, in the illustrated embodiment the UE 1104 is required to have both the valid C-SIB1 1108 and valid D-SIB1 1110 when the UE 1104 camps 1116 on one cell. Upon arrival of uplink data at the UE 1104, the UE 1104 can send an initial access message 1118 based on the information from the C-SIB1 1108 and the D-SIB1 1110.
[0092] FIG. 12 illustrates an example signal flow diagram 1202 where only C-SIB1 1212 is considered by the UE 1204 during cell selection or cell reselection in accordance with some embodiments. As shown, the UE 1204 may be in an idle / inactive state 1208. In the illustrated embodiment, content of D-SIB1 1216 only impacts the initial access (e.g., RACH, UAC) .
[0093] The UE 1204 may receive a MIB 1210 from the network node 1206. The UE 1204 may receive a C-SIB1 1212 from the network node 1106. If the UE 1204 already has a C-SIB1 1212 for the area associated with the network node 1206, the UE 1204 may use the previously obtained C-SIB1 1212. For example, if the target cell is in the same C-SIB1 area as the previous cell, the UE 1204 may use the previously obtained C-SIB1 1212 and skip obtaining the C-SIB1 1212 again.
[0094] In the illustrated embodiment, the UE 1204 is required to have a valid C-SIB1 1212 when camping on one cell. The UE can use the content of the C-SIB1 1212 to decide to camp 1214 on the cell or not. After the UE 1204 camps on the cell, the UE 1204 may obtain the D-SIB1 1216 before initial access. In the illustrated embodiment, the UE 1204 is required to have valid D-SIB1 1216 before initial access D-SIB1 1216. If the network node 1206 has a D-SIB1 1216, the network node 1206 may send the D-SIB1 1216 to the UE 1204. If the network node 1206 is using the configuration included in the C-SIB1 1212 without change, there may be no D-SIB1 1216.
[0095] The UE 1204 may obtain the D-SIB1 1216 after the UE 1204 camps 1214 on the cell. In some embodiments, the UE 1204 may acquire the D-SIB1 1216 when the UE 1204 intends to trigger initial access 1218. In some embodiments, it may be up to UE 1204 implementation to acquire D-SIB1 1216 after cell camping before initial access trigger. For example, there may be a preconfigured time gap between when the UE camps 1214 on the cell and when the initial access 1218 in which the UE 1204 obtains the D-SIB1 1216. As shown the UE 1204 may send a message for the initial access 1218 based on the content of the D-SIB1 1216.
[0096] FIG. 13 and FIG. 14 illustrate example signal flow diagrams for D-SIB1 provisioning methods. Which procedure is used may be up to network implementation. In some embodiments, the network may indicate which procedure is used.
[0097] Specifically, FIG. 13 illustrates an example signal flow diagram 1302 where the D-SIB1 (D-SIB1 1318 and D-SIB1 1320) is provided in an on-demand SIB provisioning method in accordance with some embodiments. As illustrated, the UE 1304 may be in an IDLE / INACTIVE state 1308.
[0098] The UE 1304 may receive a MIB 1310 from the network node 1306. The UE 1304 may receive a C-SIB1 1312 from the network node 1306. If the UE 1304 already has a C-SIB1 1312 for the area associated with the network node 1306, the UE 1304 may use the previously obtained C-SIB1 1312. For example, if the target cell is in the same C-SIB1 area as the previous cell, the UE 1304 may use the previously obtained C-SIB1 1312 and skip obtaining the C-SIB1 1312 again.
[0099] Uplink request information can be provided in the MIB 1310 or in the C-SIB1 1312 part. In some embodiments, the uplink request information can be carried in a combination of MIB 1310 and the C-SIB1 1312. The UE 1304 may use the uplink request information to determine the configuration 1314 of an uplink request. The UE 1304 may transmit an uplink request for D-SIB1 1316 based on the request information acquired in the MIB and / or the C-SIB1 1312.
[0100] The network node 1306 can provide the D-SIB1 (e.g., D-SIB1 1318 and D-SIB1 1320) based on the UE request (e.g., uplink request for D-SIB1 1316) in a broadcast way. The network node 1306 may provide the D-SIB1 in a broadcast way according to the SIB scheduling method (SI-window, periodicity) . The UE 1304 may monitor for and receive the broadcast based on the SIB scheduling. The UE 1304 may use the information in the D-SIB1 1318 for initial access procedure with the network node 1306.
[0101] FIG. 14 illustrates an example signal flow diagram 1402 where the D-SIB1 1418 is provided as a response to a UE uplink request (e.g., uplink request for D-SIB1 1416) in accordance with some embodiments. As illustrated, the UE 1404 may be in an IDLE / INACTIVE state 1408.
[0102] The UE 1404 may receive a MIB 1410 from the network node 1406. The UE 1404 may receive a C-SIB1 1412 from the network node 1406. If the UE 1404 already has a C-SIB1 1412 for the area associated with the network node 1406, the UE 1404 may use the previously obtained C-SIB1 1412. For example, if the target cell is in the same C-SIB1 area as the previous cell, the UE 1404 may use the previously obtained C-SIB1 1412 and skip obtaining the C-SIB1 1412 again.
[0103] Uplink request information can be provided in the MIB 1410 or in the C-SIB1 1412 part. In some embodiments, the uplink request information can be carried in a combination of MIB 1410 and the C-SIB1 1412. The UE 1404 may use the uplink request information to determine the configuration 1414 of an uplink request. The UE 1404 may transmit an uplink request for D-SIB1 1416 based on the request information acquired in the MIB 1410 and / or the C-SIB1 1412 in a RACH Msg 3.
[0104] The network node 1406 can provide the D-SIB1 1418 as the downlink feedback to the UE uplink request, and the transmission can be dedicated to the particular UE 1404. For example, if the uplink request (e.g., uplink request for D-SIB1 1416) is via RACH, the D-SIB1 1418 may be provided via Msg-4 / Msg-B. The D-SIB1 1418 may be configured to be a small size to be accommodated on the RACH msg-4. The UE may receive the D-SIB1 1418 and use the information in the D-SIB1 1418 for initial access procedure with the network node 1406.
[0105] Embodiments herein may employ various C-SIB1 provisioning methods. In some embodiments, if C-SIB1 is provided using an on-demand method, the network node may provide the uplink request config in the MIB. In a first option, the uplink request configuration for C-SIB1 and D-SIB1 can be separate. In a second option, the uplink configuration can be part of D-SIB1 for getting C-SIB1.
[0106] For example, a procedure that may be used for the first option (e.g., the uplink request configuration for C-SIB1 and D-SIB1 can be separate) may include the following. If the UE has no valid C-SIB1, and network node does not provide C-SIB1 in periodically way, the UE can send an uplink request for C-SIB1. The network node may be assumed to provide both C-SIB1 and D-SIB1 together to UE. In some embodiments, the network node may start to broadcast C-SIB1 and D-SIB1 based on UE request. In some embodiments, the network node may provide the C-SIB1 and D-SIB1 together to UE via the UE dedicated feedback to UE request.
[0107] A procedure that may be used for the second option (e.g., the uplink configuration can be part of D-SIB1 for getting C-SIB1) may include the following. It may be assumed some essential information (e.g., PLMN ID / local Area ID, etc. ) for cell camping is provided in MIB and / or D-SIB1. The UE may first acquire the MIB and / or D-SIB1, and if the UE can camp on this cell, the UE can further acquire SIB1 (e.g., C-SIB1) if UE does not have the available SIB1 in current cell.
[0108] Regarding area control of C-SIB1 for the embodiments herein, the following may be used to identify the area for which the C-SIB applies. In some embodiments, to identify the area to apply the C-SIB, one of the following two options may be employed. A first option may be based on an area identifier (ID) . In such embodiments, the Area (cells) applicable to the C-SIB can be identified by the area ID. In some embodiments, when a network node provides the C-SIB, the network node may provide the area ID. In some embodiments, regardless of whether the C-SIB is broadcasted or not, the network node can provide the SIB1 Area ID in MIB. When the UE camps on a cell, the UE can acquire the C-SIB1 area ID in MIB. The UE can check whether it has the valid SIB1 for the area corresponding to the area ID. If UE has no valid C-SIB1, the UE can initiate the C-SIB1 acquisition procedure.
[0109] A second option may be based on an Area configuration. For example, the network may provide the SIB1 area configuration in a SIB1 message. The SIB1 Area configuration can include an applicable cell list (e.g., frequency and physical cell identity (PCI) , area / location) . In such embodiments, when the UE camps on a cell, the UE can acquire the PCI and frequency from the MIB / primary synchronization signal (PSS) . If the UE determines that the PCell and frequency is in the area list, the UE may not acquire the new C-SIB1. If UE has no valid C-SIB1 for the cell, the UE can initiate the C-SIB1 acquisition procedure.
[0110] FIG. 15 illustrates a method 1500 for a UE, according to embodiments herein. The illustrated method 1500 includes receiving 1502, from a network node, a C-SIB1 comprising a system information configuration that is valid across multiple cells. The method 1500 further includes receiving 1504, from the network node, a D-SIB1 comprising a configuration specific to a cell of the network node. The method 1500 further includes sending 1506, to the network node, an initial access transmission based on the C-SIB1 and the D-SIB1 to establish a dedicated connection between the UE and the network node.
[0111] In some embodiments, the method 1500 further comprises camping on the cell based on the system information configuration in the C-SIB1, wherein the system information configuration in the C-SIB1 without the configuration in the D-SIB1 is considered during cell selection or reselection wherein the configuration in the D-SIB1 only impacts the initial access transmission, and wherein the UE receives the D-SIB1 prior to the initial access transmission. Some such embodiments further comprise sending a request for the D-SIB1 to the network node when the UE intends to send the initial access transmission. Some other such embodiments further comprise sending a request for the D-SIB1 to the network node during a preconfigured time duration after the camping on the cell.
[0112] In some embodiments of the method 1500, the system information configuration in the C-SIB1 and the configuration in the D-SIB1 together provide SIB1 for the cell.
[0113] In some embodiments of the method 1500, the D-SIB1 includes UAC configuration for the cell and a RACH configuration for the cell, wherein both the UAC information and a RACH configuration are not included in the C-SIB1.
[0114] In some embodiments of the method 1500, the C-SIB1 includes an access control information list that includes multiple UAC configurations and multiple RACH configurations and wherein the D-SIB1 includes a RACH configuration ID to indicate which of the multiple RACH configurations applies to the cell, and a UAC ID to indicate which of the multiple UAC configurations applies to the cell.
[0115] In some embodiments, the method 1500 further comprises receiving a MIB from the network node; and sending a request for the D-SIB1 to the network node, wherein configuration information for the request is included in the MIB or the C-SIB1, wherein the D-SIB1 is received in a broadcast or in a dedicated transmission.
[0116] In some embodiments of the method 1500, the C-SIB1 is associated with a first area ID, and wherein the method 1500 further comprises: performing cell reselection to move to a second cell by acquiring a MIB for the second cell, the MIB comprising a second area ID associated with the second cell; determining whether the C-SIB1 is valid for the second cell based on whether the first area ID and the second area ID are the same; in response to determining that the C-SIB1 is valid for the second cell, using the C-SIB1 to connect with the second cell; and in response to determining that the C-SIB1 is not valid for the second cell, initiating a C-SIB1 acquisition procedure.
[0117] In some embodiments of the method 1500, the C-SIB1 is associated with an applicable cell list, and wherein the method 1500 further comprises: performing cell reselection to move to a second cell by: acquiring a MIB for the second cell, the MIB comprising a second area ID associated with the second cell; determining whether the C-SIB1 is valid for the second cell based on whether the second cell is included in the applicable cell list; in response to determining that the C-SIB1 is valid for the second cell, using the C-SIB1 to connect with the second cell; and in response to determining that the C-SIB is not valid for the second cell, initiating a C-SIB1 acquisition procedure.
[0118] FIG. 16 illustrates a method 1600 for a network node, according to embodiments herein. The illustrated method 1600 includes sending 1602, to a UE, a C-SIB1 comprising a system information configuration that is valid across multiple cells. The method 1600 further includes sending 1604, to the UE, a D-SIB1 comprising a configuration specific to a cell of the network node. The method 1600 further includes receiving 1606, from the UE, an initial access transmission based on the C-SIB1 and the D-SIB1.
[0119] In some embodiments of the method 1600, the C-SIB1 provides sufficient information for the UE to camp on the cell wherein the configuration in the D-SIB1 only impacts the initial access transmission, and wherein the network node sends the D-SIB1 prior to the initial access transmission. Some such embodiments further comprise receiving, from the UE, a request for the D-SIB1 when the UE intends to send the initial access transmission. Some other such embodiments further comprise receiving, from the UE, a request for the D-SIB1 during a preconfigured time duration after the UE camps on the cell.
[0120] In some embodiments of the method 1600, the system information configuration in the C-SIB1 and the configuration in the D-SIB1 together provide SIB1 for the cell.
[0121] In some embodiments of the method 1600, the D-SIB1 includes UAC configuration for the cell and a RACH configuration for the cell, wherein both the UAC information and a RACH configuration are not included in the C-SIB1.
[0122] In some embodiments of the method 1600, the C-SIB1 includes an access control information list that includes multiple UAC configurations and multiple RACH configurations and wherein the D-SIB1 includes a RACH configuration ID to indicate which of the multiple RACH configurations applies to the cell, and a UAC ID to indicate which of the multiple UAC configurations applies to the cell.
[0123] In some embodiments, the method 1600 further comprises: sending a MIB to the UE;and receiving a request for the D-SIB1 from the UE, wherein configuration information for the request is included in the MIB or the C-SIB1, wherein the D-SIB1 is sent in a broadcast or in a dedicated transmission.
[0124] In some embodiments of the method 1600, the C-SIB1 is associated with a first area ID.
[0125] In some embodiments of the method 1600, the C-SIB1 is associated with an applicable cell list.
[0126] FIG. 17 illustrates an example architecture of a wireless communication system 1700, according to embodiments disclosed herein. The following description is provided for an example wireless communication system 1700 that operates in conjunction with the LTE system standards and / or 5G or NR system standards as provided by 3GPP technical specifications.
[0127] As shown by FIG. 17, the wireless communication system 1700 includes UE 1702 and UE 1704 (although any number of UEs may be used) . In this example, the UE 1702 and the UE 1704 are illustrated as smartphones (e.g., handheld touchscreen mobile computing devices connectable to one or more cellular networks) , but may also comprise any mobile or non-mobile computing device configured for wireless communication.
[0128] The UE 1702 and UE 1704 may be configured to communicatively couple with a RAN 1706. In embodiments, the RAN 1706 may be NG-RAN, E-UTRAN, etc. The UE 1702 and UE 1704 utilize connections (or channels) (shown as connection 1708 and connection 1710, respectively) with the RAN 1706, each of which comprises a physical communications interface. The RAN 1706 can include one or more base stations (such as base station 1712 and base station 1714) that enable the connection 1708 and connection 1710.
[0129] In this example, the connection 1708 and connection 1710 are air interfaces to enable such communicative coupling, and may be consistent with RAT (s) used by the RAN 1706, such as, for example, an LTE and / or NR.
[0130] In some embodiments, the UE 1702 and UE 1704 may also directly exchange communication data via a sidelink interface 1716. The UE 1704 is shown to be configured to access an access point (shown as AP 1718) via connection 1720. By way of example, the connection 1720 can comprise a local wireless connection, such as a connection consistent with any IEEE 802.11 protocol, wherein the AP 1718 may comprise a router. In this example, the AP 1718 may be connected to another network (for example, the Internet) without going through a CN 1724.
[0131] In embodiments, the UE 1702 and UE 1704 can be configured to communicate using orthogonal frequency division multiplexing (OFDM) communication signals with each other or with the base station 1712 and / or the base station 1714 over a multicarrier communication channel in accordance with various communication techniques, such as, but not limited to, an orthogonal frequency division multiple access (OFDMA) communication technique (e.g., for downlink communications) or a single carrier frequency division multiple access (SC-FDMA) communication technique (e.g., for uplink and ProSe or sidelink communications) , although the scope of the embodiments is not limited in this respect. The OFDM signals can comprise a plurality of orthogonal subcarriers.
[0132] In some embodiments, all or parts of the base station 1712 or base station 1714 may be implemented as one or more software entities running on server computers as part of a virtual network. In addition, or in other embodiments, the base station 1712 or base station 1714 may be configured to communicate with one another via interface 1722. In embodiments where the wireless communication system 1700 is an LTE system (e.g., when the CN 1724 is an EPC) , the interface 1722 may be an X2 interface. The X2 interface may be defined between two or more base stations (e.g., two or more eNBs and the like) that connect to an EPC, and / or between two eNBs connecting to the EPC. In embodiments where the wireless communication system 1700 is an NR system (e.g., when CN 1724 is a 5GC) , the interface 1722 may be an Xn interface. The Xn interface is defined between two or more base stations (e.g., two or more gNBs and the like) that connect to 5GC, between a base station 1712 (e.g., a gNB) connecting to 5GC and an eNB, and / or between two eNBs connecting to 5GC (e.g., CN 1724) .
[0133] The RAN 1706 is shown to be communicatively coupled to the CN 1724. The CN 1724 may comprise one or more network elements 1726, which are configured to offer various data and telecommunications services to customers / subscribers (e.g., users of UE 1702 and UE 1704) who are connected to the CN 1724 via the RAN 1706. The components of the CN 1724 may be implemented in one physical device or separate physical devices including components to read and execute instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium) .
[0134] In embodiments, the CN 1724 may be an EPC, and the RAN 1706 may be connected with the CN 1724 via an S1 interface 1728. In embodiments, the S1 interface 1728 may be split into two parts, an S1 user plane (S1-U) interface, which carries traffic data between the base station 1712 or base station 1714 and a serving gateway (S-GW) , and the S1-MME interface, which is a signaling interface between the base station 1712 or base station 1714 and mobility management entities (MMEs) .
[0135] In embodiments, the CN 1724 may be a 5GC, and the RAN 1706 may be connected with the CN 1724 via an NG interface 1728. In embodiments, the NG interface 1728 may be split into two parts, an NG user plane (NG-U) interface, which carries traffic data between the base station 1712 or base station 1714 and a user plane function (UPF) , and the S1 control plane (NG-C) interface, which is a signaling interface between the base station 1712 or base station 1714 and access and mobility management functions (AMFs) .
[0136] Generally, an application server 1730 may be an element offering applications that use internet protocol (IP) bearer resources with the CN 1724 (e.g., packet switched data services) . The application server 1730 can also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc. ) for the UE 1702 and UE 1704 via the CN 1724. The application server 1730 may communicate with the CN 1724 through an IP communications interface 1732.
[0137] FIG. 18 illustrates a system 1800 for performing signaling 1834 between a wireless device 1802 and a network device 1818, according to embodiments disclosed herein. The system 1800 may be a portion of a wireless communications system as herein described. The wireless device 1802 may be, for example, a UE of a wireless communication system. The network device 1818 may be, for example, a base station (e.g., an eNB or a gNB) of a wireless communication system.
[0138] The wireless device 1802 may include one or more processor (s) 1804. The processor (s) 1804 may execute instructions such that various operations of the wireless device 1802 are performed, as described herein. The processor (s) 1804 may include one or more baseband processors implemented using, for example, a central processing unit (CPU) , a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
[0139] The wireless device 1802 may include a memory 1806. The memory 1806 may be a non-transitory computer-readable storage medium that stores instructions 1808 (which may include, for example, the instructions being executed by the processor (s) 1804) . The instructions 1808 may also be referred to as program code or a computer program. The memory 1806 may also store data used by, and results computed by, the processor (s) 1804.
[0140] The wireless device 1802 may include one or more transceiver (s) 1810 that may include radio frequency (RF) transmitter circuitry and / or receiver circuitry that use the antenna (s) 1812 of the wireless device 1802 to facilitate signaling (e.g., the signaling 1834) to and / or from the wireless device 1802 with other devices (e.g., the network device 1818) according to corresponding RATs.
[0141] The wireless device 1802 may include one or more antenna (s) 1812 (e.g., one, two, four, or more) . For embodiments with multiple antenna (s) 1812, the wireless device 1802 may leverage the spatial diversity of such multiple antenna (s) 1812 to send and / or receive multiple different data streams on the same time and frequency resources. This behavior may be referred to as, for example, multiple input multiple output (MIMO) behavior (referring to the multiple antennas used at each of a transmitting device and a receiving device that enable this aspect) . MIMO transmissions by the wireless device 1802 may be accomplished according to precoding (or digital beamforming) that is applied at the wireless device 1802 that multiplexes the data streams across the antenna (s) 1812 according to known or assumed channel characteristics such that each data stream is received with an appropriate signal strength relative to other streams and at a desired location in the spatial domain (e.g., the location of a receiver associated with that data stream) . Certain embodiments may use single user MIMO (SU-MIMO) methods (where the data streams are all directed to a single receiver) and / or multi user MIMO (MU-MIMO) methods (where individual data streams may be directed to individual (different) receivers in different locations in the spatial domain) .
[0142] In certain embodiments having multiple antennas, the wireless device 1802 may implement analog beamforming techniques, whereby phases of the signals sent by the antenna (s) 1812 are relatively adjusted such that the (joint) transmission of the antenna (s) 1812 can be directed (this is sometimes referred to as beam steering) .
[0143] The wireless device 1802 may include one or more interface (s) 1814. The interface (s) 1814 may be used to provide input to or output from the wireless device 1802. For example, a wireless device 1802 that is a UE may include interface (s) 1814 such as microphones, speakers, a touchscreen, buttons, and the like in order to allow for input and / or output to the UE by a user of the UE. Other interfaces of such a UE may be made up of transmitters, receivers, and other circuitry (e.g., other than the transceiver (s) 1810 / antenna (s) 1812 already described) that allow for communication between the UE and other devices and may operate according to known protocols (e.g., and the like) .
[0144] The wireless device 1802 may include a SIB1 module 1816. The SIB1 module 1816 may be implemented via hardware, software, or combinations thereof. For example, the SIB1 module 1816 may be implemented as a processor, circuit, and / or instructions 1808 stored in the memory 1806 and executed by the processor (s) 1804. In some examples, the SIB1 module 1816 may be integrated within the processor (s) 1804 and / or the transceiver (s) 1810. For example, the SIB1 module 1816 may be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the processor (s) 1804 or the transceiver (s) 1810.
[0145] The SIB1 module 1816 may be used for various aspects of the present disclosure, for example, aspects of FIGS. 1-17.
[0146] The network device 1818 may include one or more processor (s) 1820. The processor (s) 1820 may execute instructions such that various operations of the network device 1818 are performed, as described herein. The processor (s) 1820 may include one or more baseband processors implemented using, for example, a CPU, a DSP, an ASIC, a controller, an FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
[0147] The network device 1818 may include a memory 1822. The memory 1822 may be a non-transitory computer-readable storage medium that stores instructions 1824 (which may include, for example, the instructions being executed by the processor (s) 1820) . The instructions 1824 may also be referred to as program code or a computer program. The memory 1822 may also store data used by, and results computed by, the processor (s) 1820.
[0148] The network device 1818 may include one or more transceiver (s) 1826 that may include RF transmitter circuitry and / or receiver circuitry that use the antenna (s) 1828 of the network device 1818 to facilitate signaling (e.g., the signaling 1834) to and / or from the network device 1818 with other devices (e.g., the wireless device 1802) according to corresponding RATs.
[0149] The network device 1818 may include one or more antenna (s) 1828 (e.g., one, two, four, or more) . In embodiments having multiple antenna (s) 1828, the network device 1818 may perform MIMO, digital beamforming, analog beamforming, beam steering, etc., as has been described.
[0150] The network device 1818 may include one or more interface (s) 1830. The interface (s) 1830 may be used to provide input to or output from the network device 1818. For example, a network device 1818 that is a base station may include interface (s) 1830 made up of transmitters, receivers, and other circuitry (e.g., other than the transceiver (s) 1826 / antenna (s) 1828 already described) that enables the base station to communicate with other equipment in a core network, and / or that enables the base station to communicate with external networks, computers, databases, and the like for purposes of operations, administration, and maintenance of the base station or other equipment operably connected thereto.
[0151] The network device 1818 may include a SIB1 module 1832. The SIB1 module 1832 may be implemented via hardware, software, or combinations thereof. For example, the SIB1 module 1832 may be implemented as a processor, circuit, and / or instructions 1824 stored in the memory 1822 and executed by the processor (s) 1820. In some examples, the SIB1 module 1832 may be integrated within the processor (s) 1820 and / or the transceiver (s) 1826. For example, the SIB1 module 1832 may be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the processor (s) 1820 or the transceiver (s) 1826.
[0152] The SIB1 module 1832 may be used for various aspects of the present disclosure, for example, aspects of FIGS. 1-17.
[0153] Embodiments contemplated herein include an apparatus comprising means to perform one or more elements of the method 1500. This apparatus may be, for example, an apparatus of a UE (such as a wireless device 1802 that is a UE, as described herein) .
[0154] Embodiments contemplated herein include one or more non-transitory computer-readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of the method 1500. This non-transitory computer-readable media may be, for example, a memory of a UE (such as a memory 1806 of a wireless device 1802 that is a UE, as described herein) .
[0155] Embodiments contemplated herein include an apparatus comprising logic, modules, or circuitry to perform one or more elements of the method 1500. This apparatus may be, for example, an apparatus of a UE (such as a wireless device 1802 that is a UE, as described herein) .
[0156] Embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of the method 1500. This apparatus may be, for example, an apparatus of a UE (such as a wireless device 1802 that is a UE, as described herein) .
[0157] Embodiments contemplated herein include a signal as described in or related to one or more elements of the method 1500.
[0158] Embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein execution of the program by a processor is to cause the processor to carry out one or more elements of the method 1500. The processor may be a processor of a UE (such as a processor (s) 1804 of a wireless device 1802 that is a UE, as described herein) . These instructions may be, for example, located in the processor and / or on a memory of the UE (such as a memory 1806 of a wireless device 1802 that is a UE, as described herein) .
[0159] Embodiments contemplated herein include an apparatus comprising means to perform one or more elements of the method 1600. This apparatus may be, for example, an apparatus of a base station (such as a network device 1818 that is a base station, as described herein) .
[0160] Embodiments contemplated herein include one or more non-transitory computer-readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of the method 1600. This non-transitory computer-readable media may be, for example, a memory of a base station (such as a memory 1822 of a network device 1818 that is a base station, as described herein) .
[0161] Embodiments contemplated herein include an apparatus comprising logic, modules, or circuitry to perform one or more elements of the method 1600. This apparatus may be, for example, an apparatus of a base station (such as a network device 1818 that is a base station, as described herein) .
[0162] Embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of the method 1600. This apparatus may be, for example, an apparatus of a base station (such as a network device 1818 that is a base station, as described herein) .
[0163] Embodiments contemplated herein include a signal as described in or related to one or more elements of the method 1600.
[0164] Embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein execution of the program by a processing element is to cause the processing element to carry out one or more elements of the method 1600. The processor may be a processor of a base station (such as a processor (s) 1820 of a network device 1818 that is a base station, as described herein) . These instructions may be, for example, located in the processor and / or on a memory of the base station (such as a memory 1822 of a network device 1818 that is a base station, as described herein) .
[0165] For one or more embodiments, at least one of the components set forth in one or more of the preceding figures may be configured to perform one or more operations, techniques, processes, and / or methods as set forth herein. For example, a baseband processor as described herein in connection with one or more of the preceding figures may be configured to operate in accordance with one or more of the examples set forth herein. For another example, circuitry associated with a UE, base station, network element, etc. as described above in connection with one or more of the preceding figures may be configured to operate in accordance with one or more of the examples set forth herein.
[0166] Any of the above described embodiments may be combined with any other embodiment (or combination of embodiments) , unless explicitly stated otherwise. The foregoing description of one or more implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of embodiments to the precise form disclosed. Modifications and variations are possible in light of the above teachings or may be acquired from practice of various embodiments.
[0167] Embodiments and implementations of the systems and methods described herein may include various operations, which may be embodied in machine-executable instructions to be executed by a computer system. A computer system may include one or more general-purpose or special-purpose computers (or other electronic devices) . The computer system may include hardware components that include specific logic for performing the operations or may include a combination of hardware, software, and / or firmware.
[0168] It should be recognized that the systems described herein include descriptions of specific embodiments. These embodiments can be combined into single systems, partially combined into other systems, split into multiple systems or divided or combined in other ways. In addition, it is contemplated that parameters, attributes, aspects, etc. of one embodiment can be used in another embodiment. The parameters, attributes, aspects, etc. are merely described in one or more embodiments for clarity, and it is recognized that the parameters, attributes, aspects, etc. can be combined with or substituted for parameters, attributes, aspects, etc. of another embodiment unless specifically disclaimed herein.
[0169] It is well understood that the use of personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users. In particular, personally identifiable information data should be managed and handled so as to minimize risks of unintentional or unauthorized access or use, and the nature of authorized use should be clearly indicated to users.
[0170] Although the foregoing has been described in some detail for purposes of clarity, it will be apparent that certain changes and modifications may be made without departing from the principles thereof. It should be noted that there are many alternative ways of implementing both the processes and apparatuses described herein. Accordingly, the present embodiments are to be considered illustrative and not restrictive, and the description is not to be limited to the details given herein, but may be modified within the scope and equivalents of the appended claims.
Claims
1.A method for a user equipment (UE) , the method comprising:receiving, from a network node, a common system information block (C-SIB1) comprising a system information configuration that is valid across multiple cells;receiving, from the network node, a dedicated SIB (D-SIB1) comprising a configuration specific to a cell of the network node; andsending, to the network node, an initial access transmission based on the C-SIB1 and the D-SIB1 to establish a dedicated connection between the UE and the network node.2.The method of claim 1, further comprising camping on the cell based on the system information configuration in the C-SIB1, wherein the system information configuration in the C-SIB1 without the configuration in the D-SIB1 is considered during cell selection or reselection;wherein the configuration in the D-SIB1 only impacts the initial access transmission, and wherein the UE receives the D-SIB1 prior to the initial access transmission.3.The method of claim 2, further comprising sending a request for the D-SIB1 to the network node when the UE intends to send the initial access transmission.4.The method of claim 2, further comprising sending a request for the D-SIB1 to the network node during a preconfigured time duration after the camping on the cell.5.The method of claim 1, wherein the system information configuration in the C-SIB1 and the configuration in the D-SIB1 together provide essential SIB (SIB1) for the cell.6.The method of claim 1, wherein the D-SIB1 includes unified access control (UAC) configuration for the cell and a Random Access Channel (RACH) configuration for the cell, wherein both the UAC information and a RACH configuration are not included in the C-SIB1.7.The method of claim 1, wherein the C-SIB1 includes an access control information list that includes multiple unified access control (UAC) configurations and multiple Random Access Channel (RACH) configurations, andwherein the D-SIB1 includes a RACH configuration identifier (ID) to indicate which of the multiple RACH configurations applies to the cell, and a UAC ID to indicate which of the multiple UAC configurations applies to the cell.8.The method of claim 1, further comprising:receiving a master information block (MIB) from the network node; andsending a request for the D-SIB1 to the network node, wherein configuration information for the request is included in the MIB or the C-SIB1,wherein the D-SIB1 is received in a broadcast or in a dedicated transmission.9.The method of claim 1, wherein the C-SIB1 is associated with a first area identifier (ID) , and wherein the method further comprises:performing cell reselection to move to a second cell by:acquiring a master information block (MIB) for the second cell, the MIB comprising a second area ID associated with the second cell;determining whether the C-SIB1 is valid for the second cell based on whether the first area ID and the second area ID are the same;in response to determining that the C-SIB1 is valid for the second cell, using the C-SIB1 to connect with the second cell; andin response to determining that the C-SIB1 is not valid for the second cell, initiating a C-SIB1 acquisition procedure.10.The method of claim 1, wherein the C-SIB1 is associated with an applicable cell list, and wherein the method further comprises:performing cell reselection to move to a second cell by:acquiring a master information block (MIB) for the second cell, the MIB comprising a second area ID associated with the second cell;determining whether the C-SIB1 is valid for the second cell based on whether the second cell is included in the applicable cell list;in response to determining that the C-SIB1 is valid for the second cell, using the C-SIB1 to connect with the second cell; andin response to determining that the C-SIB is not valid for the second cell, initiating a C-SIB1 acquisition procedure.11.A method for a network node, the method comprising:sending, to a user equipment (UE) , a common system information block (C-SIB1) comprising a system information configuration that is valid across multiple cells;sending, to the UE, a dedicated SIB (D-SIB1) comprising a configuration specific to a cell of the network node; andreceiving, from the UE, an initial access transmission based on the C-SIB1 and the D-SIB1.12.The method of claim 11, wherein the C-SIB1 provides sufficient information for the UE to camp on the cell;wherein the configuration in the D-SIB1 only impacts the initial access transmission, and wherein the network node sends the D-SIB1 prior to the initial access transmission.13.The method of claim 12, further comprising receiving, from the UE, a request for the D-SIB1 when the UE intends to send the initial access transmission.14.The method of claim 12, further comprising receiving, from the UE, a request for the D-SIB1 during a preconfigured time duration after the UE camps on the cell.15.The method of claim 11, wherein the system information configuration in the C-SIB1 and the configuration in the D-SIB1 together provide essential SIB (SIB1) for the cell.16.The method of claim 11, wherein the D-SIB1 includes unified access control (UAC) configuration for the cell and a Random Access Channel (RACH) configuration for the cell, wherein both the UAC information and a RACH configuration are not included in the C-SIB1.17.The method of claim 11, wherein the C-SIB1 includes an access control information list that includes multiple unified access control (UAC) configurations and multiple Random Access Channel (RACH) configurations, andwherein the D-SIB1 includes a RACH configuration identifier (ID) to indicate which of the multiple RACH configurations applies to the cell, and a UAC ID to indicate which of the multiple UAC configurations applies to the cell.18.The method of claim 11, further comprising:sending a master information block (MIB) to the UE; andreceiving a request for the D-SIB1 from the UE, wherein configuration information for the request is included in the MIB or the C-SIB1,wherein the D-SIB1 is sent in a broadcast or in a dedicated transmission.19.The method of claim 11, wherein the C-SIB1 is associated with a first area identifier (ID) .20.The method of claim 11, wherein the C-SIB1 is associated with an applicable cell list.
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