Configuring access control parameters in wireless communications

Abstract

This application relates to methods, systems, and devices related to digital wireless communications, and more specifically to techniques related to providing UAC parameters to a UE capable of performing a barring check based on the received parameters. A method for wireless communication can include receiving, by a wireless node, a first message from a network node, the first message including a set of access control parameters. The method can further include performing, by the wireless node, a barring check to determine whether a particular access attempt is allowed using the set of access control parameters.

Description

[0001] This application is a continuation of International Application No. PCT / CN2020 / 092339, filed on April 9, 2020, entitled “Configuring Access Control Parameters in Wireless Communications,” and claims priority to U.S. Patent Application No. 16 / 850,267, filed on April 9, 2020, entitled “Configuring Access Control Parameters in Wireless Communications.” TECHNICAL FIELD

[0002] This patent document relates generally to wireless communications. BACKGROUND

[0003] Mobile communication technologies are pushing the world towards an increasingly interconnected and networked society. The rapid growth of mobile communications and advances in technology have led to greater demands for capacity and connectivity. Other aspects, such as energy consumption, device cost, spectral efficiency, and latency, are also important in meeting the needs of various communication scenarios. Various technologies are currently being discussed, including new methods to provide higher quality of service. SUMMARY

[0004] This document discloses methods, systems, and devices related to digital wireless communications, and more specifically, techniques related to providing UAC parameters to a UE, which can perform barring checks based on the received parameters.

[0005] In one example aspect, a method for wireless communication is disclosed. The method includes receiving, by a wireless node from a network node, a first message comprising a set of access control parameters. The method further includes performing, by the wireless node, a barring check using the set of access control parameters to determine whether a particular access attempt is allowed.

[0006] In another example aspect, a method for wireless communication is disclosed. The method includes transmitting, by a network node to a wireless node, a first message comprising a set of access control parameters. The method further includes receiving, by the network node from the wireless node, a second message transmitted by the wireless node based on a result of a barring check performed by the wireless node to determine whether a particular access attempt is allowed using the set of access control parameters.

[0007] In another example aspect, a wireless communication apparatus comprising a processor is disclosed. The processor is configured to implement methods described herein.

[0008] In yet another example aspect, the various techniques described herein can be implemented as processor-executable code on a computer readable program medium.

[0009] Some embodiments can preferentially implement the following clauses written in the form of a contract.

[0010] 1. A scheme for wireless communication, comprising: receiving, by a wireless node from a network node, a first message comprising a set of access control parameters; and performing, by the wireless node, a barring check to determine whether a particular access attempt is allowed using the set of access control parameters.

[0011] 2. The scheme of clause 1, wherein the set of access control parameters comprises UAC parameters comprising barring information representing a list of access categories with associated sets of barring information for a particular network configuration.

[0012] 3. The scheme of clause 1, wherein the set of access control parameters is configured for data transmission services in an inactive state and / or an idle state.

[0013] 4. The scheme of any of clauses 1 and 3, wherein data transmission services in an inactive state and / or an idle state are classified as access category 7, wherein the wireless node performs the barring check using a set of access control parameters associated with access category 7.

[0014] 5. The scheme of any of clauses 1 and 3, wherein data transmission services in an inactive state and / or an idle state are classified as a new access category, wherein the wireless node performs the barring check using a set of access control parameters associated with the new access category.

[0015] 6. The scheme of any of clauses 1 and 3, wherein the set of access control parameters comprises a bit indicating whether data transmission in an inactive state and / or an idle state is allowed, wherein the wireless node initiates data transmission in the inactive state and / or the idle state when the bit indicates that the service is allowed.

[0016] 7. The scheme of any of clauses 1 and 3, wherein the network node supports data transmission services in an inactive state and / or an idle state, and wherein the wireless node initiates a small data transmission service without performing the barring check.

[0017] 8. The scheme of any of clauses 1 and 2, wherein UAC parameters comprising barring information representing assistance information for access category selection are provided with an associated network index.

[0018] 9. The scheme of any of clauses 1 and 2, wherein the UAC parameters comprising barring information representing assistance information for access category selection are provided with a bit Figure One mask.

[0019] 10. The approach of clause 9, wherein a size of the bitmap is equal to a number of networks sharing the cell, wherein a first bit indicates whether a first network of the multiple networks sharing the cell is associated with the barring information, the barring information representing assistance information for access class selection configured for a particular network.

[0020] 11. The approach of any of clauses 1 and 2, wherein UAC parameters are provided in a list of assistance information for access class selection configured for a particular network, the UAC parameters including barring information representing assistance information for access class selection configured for a particular network, wherein a size of the list is equal to a number of networks sharing the cell, and each entry in the list is present.

[0021] 12. The approach of clause 1, wherein the set of access control parameters includes a set of parameters for at least one neighboring cell, a neighboring frequency, or a frequency band.

[0022] 13. The approach of clause 1, wherein the set of access control parameters includes a set of parameters for a secondary cell or a secondary cell group.

[0023] 14. The approach of clause 1, wherein the set of access control parameters includes a set of parameters for a secondary cell, a secondary frequency, or a frequency band, wherein any of the secondary cell, secondary frequency, and / or secondary frequency band is a cell, frequency, and / or frequency band to be used with a camped cell for the terminal.

[0024] 15. The approach of any of clauses 1, 12, 13, and 14, further comprising:

[0025] selecting, by the wireless node, a neighboring cell, a neighboring frequency, a secondary cell, a secondary frequency, a cell in a secondary cell group, a secondary cell, and / or a cell in a secondary cell group based on determining that the set of access control parameters for the current cell exceeds a threshold level.

[0026] 16. The approach of clause 1, wherein the set of access control parameters includes UAC parameters for multiple wireless device types.

[0027] 17. The approach of clause 16, wherein the set of access control parameters includes a first subset of parameters for wireless nodes supporting Evolved Universal Terrestrial Radio Access New Radio Dual Connectivity, EN-DC, communication and a second subset of parameters applicable to other types of wireless devices.

[0028] 18. The approach of clause 16, wherein the set of access control parameters includes a first subset of parameters for wireless nodes that support Next Generation Radio Access Network (NG-RAN) Evolved Universal Terrestrial Radio Access New Radio (E-UTRA-NR) Dual Connectivity (NGEN-DC) communications and a second subset of parameters that are applicable to other types of wireless devices.

[0029] 19. The approach of clause 16, wherein the set of access control parameters includes a first subset of parameters for wireless nodes that support New Radio (E-UTRA) Dual Connectivity (NE-DC) communications and a second subset of parameters that are applicable to other types of wireless devices.

[0030] 20. The approach of clause 16, wherein the set of access control parameters includes a first subset of parameters for light New Radio (NR) terminals, Machine Type Communication (MTC) terminals, and / or Internet of Things (IoT) terminals.

[0031] 21. The approach of clause 16, wherein the set of access control parameters includes a first subset of parameters for wireless nodes that support New Radio (NR) Dual Connectivity (NR-DC) communications and a second subset of parameters that are applicable to other types of wireless devices.

[0032] 22. The approach of clause 16, wherein the set of access control parameters includes a first subset of parameters for wireless nodes that support Multi-Radio Access Technology (MR-DC) communications and a second subset of parameters that are applicable to other types of wireless devices.

[0033] 23. The approach of any of clauses 17-22, wherein the first subset of parameters for the wireless node includes a higher pass rate than the second subset of parameters that are applicable to other types of wireless devices.

[0034] 24. The approach of clause 1, wherein the set of access control parameters is transmitted in a System Information Block (SIB) in the first message.

[0035] 25. The approach of clause 1, wherein the first message is transmitted via dedicated Radio Resource Control (RRC) signaling.

[0036] 26. An approach for wireless communication comprising: sending, by a network node to a wireless node, a first message including a set of access control parameters; and receiving, by the network node from the wireless node, a second message sent by the wireless node based on a result of a barring check performed by the wireless node to determine whether a particular access attempt is allowed using the set of access control parameters.

[0037] 27. The approach of clause 26, wherein the set of access control parameters is configured for data transmission services in an inactive state and / or an idle state.

[0038] 28. The approach of any one of clauses 26 and 27, wherein data transmission services in an inactive state and / or an idle state are classified into an access category 7, wherein the wireless node is configured to perform the barring check using a set of access control parameters associated with the access category 7.

[0039] 29. The approach of any one of clauses 26 and 27, wherein data transmission services in an inactive state and / or an idle state are classified into a new access category, wherein the wireless node is configured to perform the barring check using a set of access control parameters associated with the new access category.

[0040] 30. The approach of any one of clauses 26 and 27, wherein the set of access control parameters comprises a bit indicating whether data transmission in an inactive state and / or an idle state is allowed, wherein the wireless node is configured to initiate data transmission in the inactive state and / or the idle state in response to determining that the bit indicates that the data transmission is allowed.

[0041] 31. The approach of any one of clauses 26 and 27, wherein the network node supports data transmission services in an inactive state and / or an idle state, and wherein the wireless node is configured to initiate the data transmission services without performing the barring check.

[0042] 32. The approach of clause 26, wherein the set of access control parameters comprises unified access control (UAC) parameters, the UAC parameters comprising barring information representing assistance information for access category selection, the UAC parameters being provided together with an associated network index.

[0043] 33. The approach of clause 26, wherein the set of access control parameters comprises barring information representing assistance information for access category selection, the set of access control parameters being provided together with a bitmap. Figure One

[0044] 34. The approach of clause 33, a size of the bitmap being equal to a number of networks sharing the cell, wherein a first bit indicates whether a first network of the multiple networks sharing the cell is associated with the barring information representing assistance information for access category selection configured for the particular network.

[0045] ​35. The approach of clause 26, wherein the set of access control parameters comprises UAC parameters provided in a list of associated sets of barring information for specific network configurations, the UAC parameters comprising barring information representing assistance information for access category selection for a specific network configuration, wherein the size of the list is equal to the number of networks sharing a cell and each entry in the list is present.

[0046] 36. The approach of clause 26, wherein the set of access control parameters comprises a set of parameters for any of: a neighbor cell, a neighbor frequency, a neighbor band, a secondary cell, a secondary frequency, a secondary band, a secondary cell group, a secondary cell, and a secondary cell group.

[0047] 37. The approach of clause 26, wherein the set of access control parameters comprises UAC parameters for multiple wireless device types.

[0048] 38. The approach of clause 26, wherein the first message comprises the set of access control parameters transmitted in a system information block, SIB, in the first message.

[0049] 39. The approach of clause 26, wherein the first message is transmitted via dedicated radio resource control, RRC, signaling.

[0050] 40. An apparatus for wireless communication, comprising a processor configured to perform the approach of any of clauses 1-39.

[0051] 41. A non-transitory computer-readable medium having code stored thereon, the code, when executed by a processor, causing the processor to implement the approach of any of clauses 1-39.

[0052] The details of one or more implementations are set forth in the accompanying attachments, drawings, and description below. Other features will be apparent from the description and drawings, and from the claims. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 is an example signaling procedure for providing UAC parameters to a UE capable of performing barring checks based on received parameters.

[0054] Figure 2 is a block diagram of an example method for providing UAC parameters to a UE capable of performing barring checks based on received parameters.

[0055] Figure 3 An example of a wireless communication system is shown in which techniques in accordance with one or more embodiments of the application can be applied.

[0056] Figure 4 Block diagram representation of a part of a hardware platform. DETAILED DESCRIPTION

[0057] The development of a new generation of wireless communication (5G New Radio (NR) communication) is part of a continuing mobile broadband evolution process to meet the requirements of growing network demand. NR will provide greater throughput, allowing more users to be connected at the same time. Other aspects, such as energy consumption, device cost, spectral efficiency, and latency, are also important to meet the needs of various communication scenarios.

[0058] A unified access control (UAC) mechanism can be used primarily to perform load balancing on the network side by configuring UAC barring parameters. Services initiated by a UE can be classified into different access categories, and different UEs are classified into different access identities. UAC parameters (including: a barring factor, which shows the probability that an access attempt will be allowed during an access barring check; and a barring time, which indicates the minimum time (in seconds) before a new access attempt is to be performed after an access attempt is barred at an access barring check for the same access category) can be configured for each access category and access identity.

[0059] A user equipment (UE) knows its own access identity and the access category of its required service, the user equipment can draw a random number "rand" uniformly distributed in the range: 0 < rand < 1 before initiating an access attempt. If "rand" is lower than the value indicated by the UAC barring factor (uac-BarringFactor) included in the "UAC barring parameters", the UE can consider that the access attempt is allowed. Otherwise, the UE can consider that the access attempt is barred. In this way, the network can control what type of UE and what type of service is preferred, while other UEs and services are not preferred, or even barred, to balance the load on the network side.

[0060] UAC parameters can now be broadcast in each cell, and all UEs camping on a particular cell can apply the UAC parameters broadcast from the cell to perform barring checks. UAC access category 1 selection assistance information (UAC-AccessCategoryl-SelectionAssistanceInfo) can be provided to the UE from the network to help decide whether access category 1 should be applied when performing unified access control.

[0061] The UAC-AccessCategoryl-SelectionAssistanceInfo can now be provided by two possible methods. The first method can be to broadcast a generic UAC-AccessCategoryl-SelectionAssistanceInfo for all networks. The second method can be to broadcast the UAC-AccessCategoryl-SelectionAssistanceInfo for each PLMN. Once the network decides to broadcast the UAC-AccessCategoryl-SelectionAssistanceInfo for each PLMN, there can be a UAC-AccessCategoryl-SelectionAssistanceInfo that can indicate that a PLMN can have to broadcast such a parameter, whether the PLMN supports access category 1 selection or not.

[0062] The UAC parameters can generally be broadcast per cell, and each UE camping on a certain cell can apply the UAC parameters broadcast from each cell to perform barring checks. Broadcasting UAC parameters for neighboring cells or frequencies can help the UE to reselect a cell or frequency for which service is allowed. Furthermore, broadcasting different UAC parameters for different types of UEs under the same cell can better assist in balancing the load on the network side.

[0063] The UAC-AccessCategoryl-SelectionAssistanceInfo can be provided from the network node to the UE to help decide whether access category 1 should be applied when performing unified access control. For the case where multiple network nodes (e.g., networks comprising a PLMN or a NPN) share the same cell, it can be desirable for different networks to be able to provide different UAC-AccessCategoryl-SelectionAssistanceInfo respectively.

[0064] Accordingly, the present embodiments relate to networks capable of providing UAC parameters to UEs and UEs performing barring checks based on received parameters. The UAC-AccessCategoryl-SelectionAssistanceInfo can be configured per network while still allowing some networks not to broadcast it. Furthermore, the present embodiments can configure UAC parameters per UE type, per frequency, or per network.

[0065] Figure 1 is an example signaling procedure 100 for providing UAC parameters to a UE capable of performing barring checks based on received parameters. As Figure 1As shown, the network node 104 can send a first message 106 to the UE 102. The first message 106 can include UAC parameters. The UE 102 can perform a barring check 108 using the UAC parameters. The UE can send a second message 110 to the network node 104 based on the result of the barring check.

[0066] Problem 1

[0067] The UAC parameters can include a list of barring information sets (e.g., uac-BarringlnfoSetList). In each barring information set, any one of a barring factor, a barring time, and a bit string (each bit indicating whether access is allowed for a specific access identity) can be included.

[0068] The UAC parameters can include common barring information (e.g., uac-BarringForCommon) applicable to all networks (including PLMNs or NPNs). In the common barring information, a list of access categories with associated barring information sets can be included.

[0069] The UAC parameters can include a list of barring information for different networks (e.g., uac-BarringPerPLMN-List or uac-BarringPerNPN-List). A list of access categories with associated barring information sets can be configured for each network.

[0070] The UAC parameters can include UAC barring parameters for data transmission in inactive and / or idle state.

[0071] In a first alternative, the data transmission service in inactive and / or idle state can be categorized as access category 7 (= MO_data), and the UE can perform an access barring check based on the access control parameters associated with access category 7.

[0072] In a second alternative, a specific access category (e.g., MO data at RRC level caused by reasons other than paging) can be introduced, and the UE can perform an access barring check based on the access control parameters associated with this new access category.

[0073] In a third alternative, one bit can be introduced to show whether data transmission in inactive and / or idle state is allowed or not, and the UE can initiate such service when allowed.

[0074] In a fourth alternative, data transmission in inactive and / or idle state can be supported by default at the network side, and the UE can initiate such service without performing a barring check.

[0075] The generic uac-AccessCategory1-SelectionAssistanceInfo can be applicable to all networks. A list of uac-AccessCategory1-SelectionAssistanceInfo can be configured, and each entry can be associated with a specific network (e.g. NPN or PLMN). An example of configuring uac-AccessCategory1-SelectionAssistanceInfo for each network respectively is given below.

[0076] In the first example, a new information element UAC-AccessCategory1-SelectionAssistanceInfo-v1xyz can be introduced, with candidate values: “a, b, c, null”, when the network can not have configured assistance information for access category 1 selection, the network can set the corresponding UAC-AccessCategory1-SelectionAssistanceInfo to “null”.

[0077] Example 1

[0078]

[0079] In the second example, uac-AccessCategory1-SelectionAssistanceInfo-v16xy with value “null” can be introduced, and if this field exists, the UE can ignore the legacy field and consider that no access barring for delay tolerant services is configured.

[0080]

[0081] The UAC-AccessCategory1-SelectionAssistanceInfo for each network can be provided by one of the following alternatives. The first alternative can include a network index, which can identify a PLMN, a PNI-NPN (or CAG) or a SNPN, and the associated UAC-AccessCategory1-SelectionAssistanceInfo is provided in SIB1. In SIB1, only the networks (PLMN, PNI-NPN or SNPN) with associated UAC-AccessCategory1-SelectionAssistanceInfo can be included and provided to the UE. This can be shown in Example 1 below.

[0082] The second alternative can include providing a bitmap and a list of UAC-AccessCategoryl-SelectionAssistanceInfo in SIB1. This can be shown in example 2 below.

[0083] The size of the bitmap can be equal to the number of PLMNs or NPNs sharing the same cell. The leftmost bit can indicate whether the first PLMN in the PLMN-IdentityInfoList or the first NPN in the NPN-IdentityInfoList is associated with the UAC-AccessCategoryl-SelectionAssistanceInfo. If a certain bit in the bitmap is set to "1", it indicates that the corresponding network is associated with the UAC-AccessCategoryl-SelectionAssistanceInfo.

[0084] The first UAC-AccessCategoryl-SelectionAssistanceInfo in the list can be associated with the network (PLMN or NPN) identified by the first bit with value "1". The second UAC-AccessCategoryl-SelectionAssistanceInfo in the list can be associated with the network (PLMN or NPN) identified by the second bit with value "1".

[0085] The size of the list of UAC-AccessCategoryl-SelectionAssistanceInfo can be equal to the number of networks (PLMNs, NPNs or PLMN+NPNs) sharing the cell. If a certain network is not associated with UAC-AccessCategoryl-SelectionAssistanceInfo, the corresponding entry in the list can be absent. This can be shown in example 3 below.

[0086] Example 1

[0087]

[0088] Example 2

[0089]

[0090]

[0091]

[0092] Example 3

[0093]

[0094]

[0095] Problem 2

[0096] UAC parameters for neighboring cells / frequencies / bands, secondary cells / frequencies / bands / cell groups, secondary cells / frequencies / bands / cell groups, or different UE types can be broadcasted or unicast to the UE. The broadcasted or unicast UAC parameters can be for neighboring cells, neighboring frequencies or bands, secondary cells or secondary cell groups, secondary cells and / or secondary frequencies (or bands). Secondary cells and secondary frequencies can refer to cells and / or frequencies that can be used with the camping cell for the UE (e.g., through carrier aggregation and / or dual / multi-connectivity).

[0097] Examples of use can include: if the UAC parameters of the current cell indicate that the cell is overloaded and the likelihood of access attempt is low, the UE decides to reselect to a cell in the neighboring cells / frequencies, secondary cells, or secondary cell groups. The network node (or NW) can determine the target cell / frequency based on the UAC parameters for neighboring cells / frequencies, secondary cells, secondary cell groups, or different UE types and handover the UE to that cell / frequency. With the above UAC parameters for neighboring cells / frequencies, the UE can initiate cell reselection based on the UAC parameters. For example, if the access to the current camping cell is not allowed (or allowed but with a lower likelihood of access), but the access to the neighboring cells / frequencies is allowed (or with a higher likelihood of access), the UE can initiate cell reselection to the neighboring cells / frequencies that allow access. With the above UAC parameters for neighboring cells / frequencies, the UE can directly initiate the initial access procedure on the relevant neighboring cells / frequencies.

[0098] For example, if access to the current camped cell is not allowed, but access to a neighboring cell / frequency is allowed, the UE can initiate the initial access procedure directly on the relevant neighboring cell / frequency. With these UAC parameters for secondary cells, secondary cell groups, secondary cells and / or secondary frequencies (or frequency bands), if the UE supports carrier aggregation or dual connectivity of the cells / frequencies associated with the UAC parameters, and access to the relevant “secondary cells, secondary cell groups, secondary cells and / or secondary frequencies (or frequency bands)” is allowed based on the associated UAC parameters, the UE can be allowed to initiate access in the camped cell. Even if access to the camped cell is not allowed based on the UAC parameters associated with the camped cell (e.g., legacy UAC parameters described in the background), access in the camped cell can be allowed. For example, in the case that the camped cell is overloaded but a neighboring cell is not overloaded and the neighboring cell can be used to serve the UE by carrier aggregation or dual connectivity. If the UE can support carrier aggregation with the neighboring cell, and access to the neighboring cell is allowed based on the UAC parameters, access in the camped cell can be allowed, and the NW can serve the UE by the neighboring cell by carrier aggregation. If the UE does not support carrier aggregation / dual connectivity with the neighboring cell, access in the camped cell can not be allowed.

[0099] Different UAC parameters broadcasted or unicast can be sent for different UE types. One or more of the following alternatives, including a combination of multiple alternatives, can be considered. The UE can select one or more of the alternatives based on the rules specified in the specification. For example, the order of processing and / or the priority of multiple UAC parameter sets should be specified in the specification. Alternatively, the UE can select one or more of the alternatives based on the capability. For example, if multiple UAC parameter sets are configured for different frequencies / bands and / or different services and / or different UEs with certain capabilities (including UE types), the UE can only consider the corresponding UAC parameters associated with the capabilities (e.g., frequencies / bands, services and / or certain capabilities) that the UE can support. Alternatively, the UE can check the UAC parameters one by one. The order of checking multiple UAC parameters can be specified in the specification or left to UE implementation. An indication can be sent to the UE that the UE can only initiate an access attempt when all the UAC parameters or certain specific UAC parameters (to be listed in the specification or indicated to the UE) that indicate the corresponding access are allowed. The UE can check the first set of UAC parameters, if passed, the UE can check the second set of UAC parameters, and so on until all the UAC parameters or all the UAC parameters in the list are checked.

[0100] If any of the UAC parameters indicate permission for the corresponding access attempt, the UE can be sent an indication that indicates that the UE is allowed to initiate an access attempt. The UE can check the first UAC parameter, and if it fails, the UE will check the second UAC parameter, and so on. Alternatively, the relationship between two or more UAC parameter sets can be specified as "AND" or "OR" according to the description in the specification. When the relationship between two or more UAC parameter sets is "AND", the UE can initiate an access attempt if both UAC parameter sets indicate permission. When the relationship between two or more UAC parameter sets is "OR", the UE can initiate an access attempt if any of the two UAC parameter sets indicates permission. Alternatively, the UE can choose the most stringent rule or the least stringent rule / parameter.

[0101] The NW can decide the target cell / frequency based on the UAC parameters for the neighboring cell / frequency, secondary cell, secondary cell group, or different UE types, and handover the UE to the cell / frequency. With the UAC parameters for the neighboring cell / frequency described above, the UE can initiate cell reselection based on the UAC parameters. For example, if the access to the current camped cell is not allowed (or allowed but with lower access probability), but the access to the neighboring cell / frequency is allowed (or with higher access probability), the UE can initiate cell reselection to the neighboring cell / frequency that allows access. With the UAC parameters for the neighboring cell / frequency described above, the UE can directly initiate an initial access procedure on the relevant neighboring cell / frequency. For example, if the access to the current camped cell is not allowed, but the access to the neighboring cell / frequency is allowed, the UE can directly initiate an initial access procedure on the relevant neighboring cell / frequency.

[0102] Even if the access to the camped cell is not allowed based on the UAC parameters associated with the camped cell (e.g., the legacy UAC parameters described in the background), but with the UAC parameters for the secondary cell, secondary cell group, secondary cell and / or secondary frequency (or band), if the UE supports carrier aggregation or dual connectivity with the cell / frequency associated with the UAC parameters, and the access to the relevant "secondary cell, secondary cell group, secondary cell and / or secondary frequency (or band)" is allowed based on the associated UAC parameters, the UE is allowed to initiate an access in the camped cell. For example, if the camped cell is overloaded but the neighboring cell is not overloaded, and the neighboring cell can serve the UE through carrier aggregation or dual connectivity, if the UE can support carrier aggregation with the neighboring cell and the access to the neighboring cell is allowed based on the UAC parameters, the access in the camped cell should be allowed, and the NW can serve the UE through the neighboring cell through carrier aggregation. If the UE does not support carrier aggregation / dual connectivity with the neighboring cell, the access in the camped cell is not allowed.

[0103] The separate broadcasted or unicast UAC parameters can be applicable to UEs supporting EN-DC and UAC parameters applicable to other UEs. Separate UAC parameters are broadcasted or unicast for light NR UEs and / or MTC UEs and / or IOT UEs. Separate broadcasted or unicast UAC parameters can be applicable to UEs supporting NGEN-DC and UAC parameters applicable to other UEs. Separate broadcasted or unicast UAC parameters can be applicable to UEs supporting NE-DC and UAC parameters applicable to other UEs. Separate broadcasted or unicast UAC parameters can be applicable to UEs supporting NR-DC and UAC parameters applicable to other UEs. Separate broadcasted or unicast UAC parameters can be applicable to UEs supporting MR-DC (including EN-DC, NGEN-DC, NE-DC, or NR-DC) and UAC parameters applicable to other UEs.

[0104] The UAC parameters for UEs supporting EN-DC, NGEN-DC, NE-DC, NR-DC, or MR-DC can be set with a higher pass rate compared to UAC parameters for other UEs, because UEs supporting EN-DC, NGEN-DC, NE-DC, NR-DC, or MR-DC can be bypassed to a second cell group for service, thus not increasing the load in the primary cell that broadcasts the UAC parameters.

[0105] Problem 3

[0106] The UAC parameters can be broadcasted in system information (e.g., SIB1, SIB2, SIB3, SIB4, SIB5, or a new SIB) or dedicated RRC signaling (e.g., RRCRelease message or RRCReconfiguration message). Optionally, in case multiple UAC parameters are configured in system information, the NW can configure the UE with dedicated signaling indicating which UAC parameters are to be used for the UE in idle and / or inactive and / or connected mode. A common configuration can be applied for different modes or separate configurations can be configured for different modes.

[0107] Problem 4

[0108] The UAC parameters can be exchanged between two network nodes. The UAC parameters for serving cells / frequencies or neighboring cells / frequencies, secondary cells, secondary cell groups, or different UE types can be sent from one RAN node to another RAN node via any of the XN setup response message, XN setup request message, handover request message, handover request acknowledge message, handover preparation failure message, get UE context request message, and get UE context response message.

[0109] The UAC parameters for serving cell / frequency or neighboring cell / frequency, secondary cell, secondary cell group, or different UE type can be sent from the RAN node to the core network node via any one of the following messages: initial context setup response message, initial context setup failure message, PDU session resource setup response message, PDU session resource modification response message, user equipment (UE) context modification response message, handover required message, initial UE message, handover failure message, handover request acknowledge message, and path switch request message.

[0110] The UAC parameters for serving cell / frequency or neighboring cell / frequency, secondary cell, secondary cell group, or different UE type can be sent from the core network node to the RAN node via any one of the following messages: initial context setup request message, PDU session resource modification request message, PDU session resource setup request message, handover command message, handover request message, path switch request acknowledge message, path switch request failure message, and UE context modification request message.

[0111] Problem 5

[0112] UE behavior upon receiving UAC parameters for data transmission in inactive and / or idle state. Upon receiving UAC parameters for data transmission in inactive and / or idle state, the UE can perform access barring check based on the received UAC parameters.

[0113] The UAC parameters for data transmission in inactive and / or idle state can be an indicator indicating allowed or not allowed, or a barring information set including barring factor and barring time. The indicator or barring information set can be configured as a common configuration applicable to all networks or a network-specific configuration with each network linked to an indicator or barring information set.

[0114] If the barring check result indicates that data transmission in inactive and / or idle state can not be allowed, the UE can start a timer with a value set to the barring time and initiate an access attempt upon expiry of the timer. Alternatively, the UE can initiate RRC connection establishment or RRC connection resume procedure.

[0115] Problem 6

[0116] This problem can be related to UE behavior when multiple UAC parameters are configured. The UAC can check whether multiple UAC parameter sets are applicable to the UE / service. One or more of the following alternatives, including combinations of multiple alternatives, can be considered.

[0117] The UE can select one or more of the alternatives based on rules specified in the specification. For example, the processing order and / or priority of multiple UAC parameter sets can be specified in the specification.

[0118] Alternatively, the UE can select one or more of the alternatives based on capability. For example, if multiple UAC parameter sets are configured for different frequencies / bands and / or different services and / or different UEs with certain capabilities (including UE type), the UE can only consider the respective UAC parameters associated with the capabilities the UE can support (e.g., frequencies / bands the UE can support, services the UE can support, and / or certain capabilities the UE can support).

[0119] Alternatively, the UE can check the UAC parameters one by one. The order of checking the multiple UAC parameters can be specified or left to UE implementation.

[0120] The UE can be sent an indication that indicates the UE can only initiate an access attempt if all the UAC parameters or certain specific UAC parameters (to be listed or indicated to the UE) indicating the respective access are allowed. The UE can check the first UAC parameter, if passed, the UE can check the second UAC parameter set, and so on until all the UAC parameters or all the UAC parameters in the list are checked.

[0121] The UE can be sent an indication to indicate the UE is allowed to initiate an access attempt if any of the UAC parameters indicates permission for the respective access attempt. The UE can check the first UAC parameter, if not passed, the UE can check the second UAC parameter, and so on.

[0122] Alternatively, the relationship between two or more UAC parameter sets can be “and” or “or”.

[0123] When the relationship between two or more UAC parameter sets is “and”, the UE can initiate an access attempt if both UAC parameter sets indicate permission.

[0124] When the relationship between two or more UAC parameter sets is “or”, the UE can initiate an access attempt if any of the two UAC parameter sets shows permission.

[0125] Alternatively, the UE can adopt the most stringent rule or the least stringent rule / parameter.

[0126] Implementation Example 1: Provide UAC parameters for the redirected carrier in the RRCRelease message

[0127]

[0128]

[0129]

[0130]

[0131]

[0132] Example 2: Providing UAC parameters for neighbor frequencies in RRCRelease message

[0133] A UAC BarringPerfFrequency list is provided in the RRCRelease message, the size of which is equal to the number of frequencies provided in freqPriorityListNR. Each UAC BarringPerfFrequency in the list is linked to a frequency provided in freqPriorityListNR. If a frequency is not associated with a UAC BarringPerfFrequency, the corresponding entry in the list is absent.

[0134]

[0135]

[0136]

[0137]

[0138] The following is an example implementation of providing UAC parameters for different UE types in SIB1. Separate UAC parameters can be broadcasted for MR-DC capable UEs and light NR UEs. Upon reception of SIB1, UEs that do not support MR-DC or light NR can perform barring check based on UAC parameters in uac-BarringInfo. MR-DC capable UEs can perform barring check based on UAC parameters in uac-BarringInfo and uac-BarringInfo-MRDC-r1x, and initiate access attempt if either of uac-BarringInfo and uac-BarringInfo-MRDC-r1x indicates grant. UEs that support light NR UEs can perform barring check based on UAC parameters in uac-BarringInfo-NRLight-r1x, and initiate access attempt if uac-BarringInfo-NRLight-r1x indicates grant.

[0139]

[0140]

[0141]

[0142] In some embodiments, UAC barring parameters for small data transmission services can be broadcasted in the inactive state. Network specific UAC-AccessCategoryl-SelectionAssistanceInfo can be broadcasted. UAC parameters for neighboring cells / frequencies, secondary cells, secondary cell groups, or different UE types can be broadcasted. UAC parameters can be broadcasted in SIB2, SIB3, SIB4, SIB5, or a new SIB. Unicast UAC parameters can be transmitted via dedicated signaling (e.g., RRCRelease message).

[0143] Figure 2 is a block diagram of an example method 200 for providing UAC parameters to a UE capable of performing barring checks based on received parameters. The method can include receiving, by a wireless node from a network node, a first message including a set of access control parameters (block 202). As described herein, the set of access control parameters can include UAC parameters.

[0144] The method can also include performing, by the wireless node, a barring check to determine whether a particular access attempt is allowed using the set of access control parameters (block 204).

[0145] In some embodiments, the set of access control parameters includes UAC parameters including barring information representing a list of access categories and an associated set of barring information configured for a particular network.

[0146] The set of access control parameters can include a list of barring information sets (e.g., uac-BarringlnfoSetList). In each barring information set, a barring factor, a barring time, and a bit string (each bit indicating whether access is allowed for a particular access identity) can be included. The set of access control parameters can include common barring information (e.g., uac-BarringForCommon) applicable to all networks (including PLMNs or NPNs). In the common barring information, a list of access categories with an associated set of barring information can be included. The set of access control parameters can include a list of barring information for different networks (e.g., uac-BarringPerPLMN-List or uac-BarringPerNPN-List). A list of access categories with an associated set of barring information can be configured for each network.

[0147] In some embodiments, the set of access control parameters is configured for data transmission services in the inactive state and / or the idle state.

[0148] In some embodiments, the data transfer service in inactive state and / or idle state is classified into access category 7, wherein the wireless node performs barring check using a set of access control parameters associated with access category 7.

[0149] In some embodiments, the data transfer service in inactive state and / or idle state is classified into a new access category, wherein the wireless node performs barring check using a set of access control parameters associated with the new access category.

[0150] In some embodiments, the set of access control parameters includes a bit indicating whether data transfer in inactive state and / or idle state is allowed, wherein the wireless node initiates data transfer in inactive state and / or idle state when the bit indicates that the service is allowed.

[0151] In some embodiments, the network node supports data transfer service in inactive state and / or idle state, and wherein the wireless node initiates small data transfer service without performing barring check.

[0152] In some embodiments, the UAC parameters are provided with an associated network index, the UAC parameters including barring information representing assistance information for access category selection.

[0153] In some embodiments, the UAC parameters are provided with a bit Figure One representing barring information representing assistance information for access category selection.

[0154] In some embodiments, the size of the bitmap is equal to the number of networks sharing the cell, wherein the first bit indicates whether a first network of the multiple networks sharing the cell is associated with barring information, the barring information representing assistance information for access category selection configured for a particular network. The leftmost bit can indicate whether the first PLMN in the PLMN-IdentityInfo list or the first NPN in the NPN-IdentityInfo list is associated with the UAC-AccessCategoryl-SelectionAssistanceInfo. If a certain bit in the bitmap is set to "1", it indicates that the corresponding network is associated with the UAC-AccessCategoryl-SelectionAssistanceInfo. The first UAC-AccessCategoryl-SelectionAssistanceInfo in the list can be associated with the network (PLMN or NPN) identified by the first bit with value "1". The second UAC-AccessCategoryl-SelectionAssistanceInfo in the list can be associated with the network (PLMN or NPN) identified by the second bit with value "1".

[0155] In some embodiments, the UAC parameter is provided in a list of assistance information for access category selection configured for a particular network, the UAC parameter comprising barring information, the barring information representing assistance information for access category selection configured for a particular network, wherein the size of the list is equal to the number of networks sharing the cell, and each entry in the list is present.

[0156] In some embodiments, the set of access control parameters comprises a set of parameters for at least one neighboring cell, neighboring frequency, or frequency band.

[0157] In some embodiments, the set of access control parameters comprises a set of parameters for a secondary cell or a secondary cell group.

[0158] In some embodiments, the set of access control parameters comprises a set of parameters for a secondary cell, secondary frequency, or secondary frequency band, wherein any of the secondary cell, secondary frequency, and / or secondary frequency band is a cell, frequency, and / or frequency band to be used with the camped cell for the terminal.

[0159] In some embodiments, the method can comprise selecting, by the wireless node, a neighboring cell, a neighboring frequency, a secondary cell, a secondary frequency, a cell in a secondary cell group, a secondary cell, and / or a cell in a secondary cell group based on determining that the set of access control parameters for the current cell exceeds a threshold level.

[0160] In some embodiments, the set of access control parameters includes UAC parameters for multiple wireless device types.

[0161] In some embodiments, the set of access control parameters includes a first subset of parameters for wireless nodes that support Evolved Universal Terrestrial Radio Access New Radio Dual Connectivity (EN-DC) communications and a second subset of parameters applicable to other types of wireless devices.

[0162] In some embodiments, the set of access control parameters includes a first subset of parameters for wireless nodes that support Next Generation Radio Access Network (NG-RAN) Evolved Universal Terrestrial Radio Access New Radio (E-UTRA-NR) Dual Connectivity (NGEN-DC) communications and a second subset of parameters applicable to other types of wireless devices.

[0163] In some embodiments, the set of access control parameters includes a first subset of parameters for wireless nodes that support New Radio (E-UTRA) Dual Connectivity (NE-DC) communications and a second subset of parameters applicable to other types of wireless devices.

[0164] In some embodiments, the set of access control parameters includes a first subset of parameters for light-weight New Radio terminals, Machine Type Communication (MTC) terminals, and / or Internet of Things (IoT) terminals.

[0165] In some embodiments, the set of access control parameters includes a first subset of parameters for wireless nodes that support New Radio Dual Connectivity (NR-DC) communications and a second subset of parameters applicable to other types of wireless devices.

[0166] In some embodiments, the set of access control parameters includes a first subset of parameters for wireless nodes that support Multi-Radio Access Technology Dual Connectivity (MR-DC) communications and a second subset of parameters applicable to other types of wireless devices.

[0167] In some embodiments, the first subset of parameters for wireless nodes includes a higher pass rate than the second subset of parameters applicable to other types of wireless devices.

[0168] In some embodiments, the set of access control parameters is transmitted in a System Information Block (SIB) in the first message.

[0169] In some embodiments, the first message is transmitted via dedicated radio resource control, RRC, signaling. The dedicated RRC message can be a RRCRelease message or a RRCReconfiguration message. Optionally, in case multiple UAC parameters are configured in system information, the NW can use dedicated signaling to configure the UE which UAC parameters are to be used for the UE in idle and / or inactive and / or connected mode. A common configuration can be applied for different modes or separate configurations can be configured for different modes.

[0170] In another example embodiment, a method for wireless communication includes transmitting, by a network node, a first message to a wireless node, the first message including a set of access control parameters. The method can also include receiving, by the network node, a second message from the wireless node, the second message being transmitted by the wireless node based on a result of a barring check performed by the wireless node using the set of access control parameters to determine whether a particular access attempt is allowed.

[0171] In some embodiments, the set of access control parameters is configured for data transmission services in an inactive state and / or an idle state.

[0172] In some embodiments, data transmission services in an inactive state and / or an idle state are classified as an access category 7, wherein the wireless node is configured to perform a barring check using a set of access control parameters associated with the access category 7.

[0173] In some embodiments, data transmission services in an inactive state and / or an idle state are classified as a new access category, wherein the wireless node is configured to perform a barring check using a set of access control parameters associated with the new access category.

[0174] In some embodiments, the set of access control parameters includes a bit indicating whether data transmission in an inactive state and / or an idle state is allowed, wherein the wireless node is configured to initiate the data transmission in the inactive state and / or the idle state in response to determining that the bit indicates that the data transmission is allowed.

[0175] In some embodiments, the network node supports data transmission services in an inactive state and / or an idle state, and wherein the wireless node is configured to initiate the data transmission services without performing a barring check.

[0176] In some embodiments, wherein the set of access control parameters includes unified access control (UAC) parameters, the UAC parameters including barring information representing assistance information for access category selection, the set of access control parameters being provided together with an associated network index.

[0177] In some embodiments, the set of access control parameters includes barring information, the barring information representing assistance information for access category selection, the set of access control parameters being associated with a bit Figure One is provided.

[0178] In some embodiments, the size of the bitmap is equal to the number of networks sharing the cell, wherein a first bit indicates whether a first network of the multiple networks sharing the cell is associated with the barring information, the barring information representing assistance information for access category selection configured for the particular network.

[0179] In some embodiments, the set of access control parameters including UAC parameters including barring information representing assistance information for access category selection is provided in a list of associated sets of barring information configured for a particular network, wherein the size of the list is equal to the number of networks sharing the cell and each entry in the list is present.

[0180] In some embodiments, the set of access control parameters includes a set of parameters for any of a neighbor cell, a neighbor frequency, a neighbor band, a secondary cell, a secondary frequency, a secondary band, a secondary cell group, a secondary cell group, and a secondary cell group.

[0181] In some embodiments, the set of access control parameters includes UAC parameters for multiple wireless device types.

[0182] In some embodiments, the first message includes the set of access control parameters transmitted in a system information block (SIB) in the first message.

[0183] In some embodiments, the first message is transmitted through dedicated radio resource control (RRC) signaling. The dedicated RRC message can be an RRCRelease message or an RRCReconfiguration message. Optionally, in case multiple UAC parameters are configured in system information, the NW configures the UE using dedicated signaling indicating which UAC parameters are available for the UE in idle and / or inactive and / or connected mode. A common configuration can be applied for different modes or separate configurations can be configured for different modes.

[0184] Example wireless system

[0185] Figure 3An example of a wireless communication system is shown in which techniques in accordance with one or more embodiments of the technology can be applied. The wireless communication system 300 can include one or more base stations (BS) 305a, 305b, one or more wireless devices 310a, 310b, 310c, 310d, and a core network 325. The base stations 305a, 305b can provide wireless service to wireless devices 310a, 310b, 310c, and 310d in one or more wireless sectors. In some implementations, the base stations 305a, 305b include directional antennas to produce two or more directional beams to provide wireless coverage in different sectors.

[0186] The core network 325 can communicate with the one or more base stations 305a, 305b. The core network 325 provides connectivity with other wireless communication systems and wired communication systems. The core network can include one or more service subscription databases to store information related to subscribed wireless devices 310a, 310b, 310c, and 310d. The first base station 305a can provide wireless service based on a first radio access technology, while the second base station 305b can provide wireless service based on a second radio access technology. The base stations 305a and 305b can be co-located in a venue or separately installed depending on the deployment scenario. The wireless devices 310a, 310b, 310c, and 310d can support multiple different radio access technologies.

[0187] In some implementations, the wireless communication system can include multiple networks using different wireless technologies. A dual-mode or multi-mode wireless device includes two or more wireless technologies that can be used to connect to different wireless networks.

[0188] Figure 4 A block diagram representation of a hardware platform that is part of a network device or base station or wireless device (or UE). The hardware platform 405 can include a processor electronic device 410, such as a microprocessor, that implements one or more of the techniques presented herein. The hardware platform 405 can include transceiver electronic devices 415 for transmitting and / or receiving wired or wireless signals through one or more communication interfaces, such as antennas 420 or wired interfaces. The hardware platform 405 can implement other communication interfaces using defined protocols for transmitting and receiving data. The hardware platform 405 can include one or more memories (not explicitly shown) configured to store information, such as data and / or instructions. In some implementations, the processor electronic device 410 can include at least a portion of the transceiver electronic devices 415. In some embodiments, at least some of the disclosed techniques, modules, or functions are implemented using the hardware platform 405.

[0189] CONCLUSION

[0190] In view of the foregoing, it will be seen that the details of the disclosed technology are susceptible to various modifications and alternative forms. Accordingly, it should be understood that there is no intention that the application be limited to the specific-førm of the disclosed technology described hereinabove.

[0191] The disclosed and other embodiments, modules and the functional operations described in this document can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or in combinations of one or more of them. The disclosed and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer readable medium for execution by, or to control the operation of, data processing apparatus. The computer readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter effecting a machine-readable propagated signal, or a combination of one or more of them. The term "data processing apparatus" encompasses all apparatus, devices, and machines for processing data, including by way of example a programmable processor, a computer, or multiple processors or computers. The apparatus can also include, in addition to a hardware part, code that creates an execution environment for the computer program in question, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. The propagated signal is an artificially generated signal, e.g., a machine-generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to suitable receiver apparatus.

[0192] A computer program (also known as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub programs, or portions of code). A computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and are interconnected by a communication network.

[0193] The processes and logic flows described in this document can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit).

[0194] Processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto-optical, or optical disks. However, a computer need not have such devices. Computer readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and memory devices, including by way of example semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.

[0195] Although the present patent document contains many details, these should not be construed as limiting the scope of any invention or of any claim that can be presented in this patent document. Certain features that are described in this patent document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented separately or in any suitable subcombination. Moreover, although features can be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination and the claimed combination can be directed to a subcombination or variation of a subcombination.

[0196] Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring such order, nor that all illustrated operations be performed, to implement such operations, and each operation can be performed in a different order or concurrently with other operations disclosed herein. Additionally, the separation of various system components in the embodiments described herein should not be understood as requiring such separation in all embodiments.

[0197] Only a few implementations and examples are described herein. Other implementations, enhancements and variations can be made based on what is described and illustrated in this patent document.

Claims

1. A method for wireless communications, comprising: receiving, by a wireless node from a network node, a first message comprising a set of access control parameters, the set of access control parameters comprising unified access control (UAC) parameters including a list of access categories and a corresponding set of barring information, the set of access control parameters further comprising a list of assistance information for access category selection for a plurality of networks sharing a cell, wherein a size of the list of assistance information for access category selection is equal to a number of networks sharing the cell; and performing, by the wireless node, an access barring check to determine whether a particular access attempt is allowed using the set of access control parameters; wherein each entry of the list of assistance information for access category selection is associated with a corresponding network of the plurality of networks sharing the cell; wherein a value of an entry of the list of assistance information for access category selection corresponds to an access category 1 not configured for the corresponding network.

2. The method of claim 1, wherein each entry of the list of assistance information for access category selection is present.

3. The method of claim 1 or 2, wherein the set of access control parameters is in a system information block (SIB) message.

4. A method for wireless communications, comprising: sending, by a network node to a wireless node, a first message comprising a set of access control parameters, the set of access control parameters comprising unified access control (UAC) parameters including a list of access categories and a corresponding set of barring information, the set of access control parameters further comprising a list of assistance information for access category selection for a plurality of networks sharing a cell, wherein a size of the list of assistance information for access category selection is equal to a number of networks sharing the cell; and receiving, by the network node from the wireless node, a second message based on a result of an access barring check performed by the wireless node to determine whether a particular access attempt is allowed using the set of access control parameters; wherein each entry of the list of assistance information for access category selection is associated with a corresponding network of the plurality of networks sharing the cell; wherein a value of an entry of the list of assistance information for access category selection corresponds to an access category 1 not configured for the corresponding network.

5. The method of claim 4, wherein each entry of the list of assistance information for access category selection is present.

6. The method of claim 4, wherein the set of access control parameters is in a system information block (SIB) message.

7. An apparatus for wireless communications implemented at a wireless node, comprising a processor configured to: receiving a first message from a network node, the first message comprising a set of access control parameters, the set of access control parameters comprising a unified access control, UAC, parameter, the UAC parameter comprising a list of access categories and a corresponding set of barring information, the set of access control parameters further comprising a list of assistance information for access category selection for a plurality of networks sharing a cell, wherein the list of assistance information for access category selection has a size equal to the number of networks sharing the cell; and perform an access barring check to determine whether a particular access attempt is allowed using the set of access control parameters; wherein each entry of the list of assistance information for access category selection is associated with a corresponding network of the plurality of networks sharing the cell; wherein a value of an entry of the list of assistance information for access category selection corresponds to an access category 1 not configured for the corresponding network.

8. The apparatus of claim 7, wherein each entry of the list of assistance information for access category selection is present.

9. The apparatus of claim 7 or 8, wherein the set of access control parameters are in a system information block (SIB) message.

10. An apparatus for wireless communication implemented at a network node, comprising a processor configured to: transmitting a first message to a wireless node, the first message comprising a set of access control parameters, the set of access control parameters comprising a unified access control (UAC) parameter, the UAC parameter comprising a list of access categories and a corresponding set of barring information, the set of access control parameters further comprising a list of assistance information for access category selection for a plurality of networks sharing a cell, wherein a size of the list of assistance information for access category selection is equal to a number of networks sharing the cell; and receive, from the wireless node, a second message based on a result of an access barring check performed by the wireless node to determine whether a particular access attempt is allowed using the set of access control parameters; wherein each entry of the list of assistance information for access category selection is associated with a corresponding network of the multiple networks sharing the cell; wherein a value of an entry of the list of assistance information for access category selection corresponds to an access category 1 not configured for the corresponding network.

11. The apparatus of claim 10, wherein each entry of the list of assistance information for access category selection is present.

12. The apparatus of claim 10, wherein the set of access control parameters are in a system information block (SIB) message.

13. A non-transitory computer-readable medium having code stored thereon, the code, when executed by a processor, causing the processor to implement the following operations: receiving, by a wireless node from a network node, a first message comprising a set of access control parameters, the set of access control parameters comprising unified access control, UAC, parameters, the UAC parameters comprising a list of access categories and a corresponding set of barring information, the set of access control parameters further comprising a list of assistance information for access category selection for a plurality of networks sharing a cell, wherein the list of assistance information for access category selection has a size equal to a number of networks sharing the cell; and perform, by the network node, an access barring check to determine whether a particular access attempt is allowed using the set of access control parameters; wherein each entry of the list of assistance information for access category selection is associated with a corresponding network of the multiple networks sharing the cell; wherein a value of an entry of the list of assistance information for access category selection corresponds to an access category 1 not configured for the corresponding network.

14. The non-transitory computer-readable medium of claim 13, wherein each entry of the list of assistance information for access category selection is present.

15. The non-transitory computer-readable medium of claim 13 or 14, wherein the set of access control parameters are in a system information block (SIB) message.

16. A non-transitory computer-readable medium having code stored thereon, the code, when executed by a processor, causing the processor to implement the following operations: transmitting, from a network node to a wireless node, a first message comprising a set of access control parameters, the set of access control parameters comprising a unified access control, UAC, parameter, the UAC parameter comprising a list of access categories and a corresponding set of barring information, the set of access control parameters further comprising a list of assistance information for access category selection for a plurality of networks sharing a cell, wherein the list of assistance information for access category selection has a size equal to a number of networks sharing the cell; and receive, by the network node from the wireless node, a second message based on a result of an access barring check performed by the wireless node to determine whether a particular access attempt is allowed using the set of access control parameters; wherein each entry of the list of assistance information for access category selection is associated with a corresponding network of the multiple networks sharing the cell; wherein a value of an entry of the list of assistance information for access category selection corresponds to an access category 1 not configured for the corresponding network.

17. The non-transitory computer-readable medium of claim 16, wherein each entry in the list of assistance information for access class selection is present.

18. The non-transitory computer-readable medium of claim 16, wherein the set of access control parameters are in a system information block (SIB) message.

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