RRM mitigation enhancement in edrx mode

Abstract

To provide RRM mitigation enhancements in eDRX mode.SOLUTION: A user equipment (UE) configures radio resource management (RRM) mitigation in extended discontinuous reception (eDRX) with or without a paging transmission window (PTW). The UE determines whether the eDRX cycle is greater than or less than 10.24 seconds, determines whether the UE meets the legacy RRM mitigation criteria for the mitigation scaling factor k, and configures the RRM mitigation timing based on the use of the paging transmission window (PTW) and the mitigation scaling factor k.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present application relates generally to wireless communication systems, including RRM mitigation based on eDRX with and without PTW. [Background technology]

[0002] Wireless mobile communication technologies use various standards and protocols to transmit data between base stations and wireless communication devices. 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 the IEEE 802.11 standard for wireless local area networks (WLANs), commonly known to industry groups as Wi-Fi®.

[0003] As contemplated by 3GPP®, different wireless communication system standards and protocols may use various radio access networks (RANs) for communication between base stations of the RAN (sometimes commonly referred to as RAN nodes, network nodes, or simply nodes) and wireless communication devices known as user equipment (UE). 3GPP RANs may 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 can perform communications between base stations and UEs using one or more radio access technologies (RATs). For example, a GERAN implements a GSM and / or EDGE RAT, a UTRAN implements a universal mobile telecommunication system (UMTS) RAT or other 3GPP RAT, an E-UTRAN implements an LTE RAT (sometimes simply referred to as LTE), and an NG-RAN implements an NR RAT (sometimes referred to herein as a 5G RAT, a 5G NR RAT, or simply NR). In certain deployments, an E-UTRAN can also implement an NR RAT. In certain deployments, an NG-RAN can also implement an LTE RAT.

[0005] A base station used by a RAN may correspond to that RAN. An example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly referred to as an evolved Node B, enhanced Node B, eNode B, or eNB). An example of an NG-RAN base station is a next-generation Node B (sometimes referred to as a Node B or gNB).

[0006] The RAN provides communication services with external entities via a connection to a core network (CN). For example, the E-UTRAN can utilize the evolved packet core (EPC), and the NG-RAN can utilize the 5G core network (5GC).

[0007] The 5G NR frequency band can be divided into two or more different frequency ranges. For example, Frequency Range 1 (FR1) may include frequency bands operating in sub-6 GHz frequencies, some of which may be used by previous standards and potentially extend to cover new frequency bands providing 410 MHz to 7125 MHz. Frequency Range 2 (FR2) may include the 24.25 GHz to 52.6 GHz frequency band. Note that in some systems, FR2 may also include the 52.6 GHz to 71 GHz (or greater) frequency band. The millimeter wave (mmWave) range bands in FR2 may have a smaller range than the FR1 bands, but the available bandwidth is potentially wider. Those skilled in the art will understand that these frequency ranges, provided as examples, may vary over time or by region.

[0008] A UE may connect to either or both the 5G NR RAT and the LTE RAT. The UE may support standalone carrier aggregation (CA) over LTE, CA over NR (NR-CA), or various dual connectivity (DC) functions in which multiple component carriers (CCs) are combined across LTE and NR. Each CC may represent a channel that facilitates communication between the UE and the network across a particular frequency band. Multiple CCs may correspond to the same frequency band, each CC may correspond to a different band, or a combination of CCs across the same and different frequency bands may be used.

[0009] To easily identify the discussion of any particular element or act, the most significant digit(s) of a reference number refers to the number of the figure in which that element is first introduced. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a block diagram of an example architecture of a wireless communication system according to embodiments disclosed herein.

[0011] [Figure 2] 1A-1C are a set of timing diagrams according to one embodiment.

[0012] [Figure 3] 1A-1C are a set of timing diagrams according to one embodiment.

[0013] [Figure 4] 1A-1C are a set of timing diagrams according to one embodiment.

[0014] [Figure 5] 1A-1C are a set of timing diagrams according to one embodiment.

[0015] [Figure 6] 1A-1C are a set of timing diagrams according to one embodiment.

[0016] [Figure 7] 1A-1C are a set of timing diagrams according to one embodiment.

[0017] [Figure 8] 1A-1C are a set of timing diagrams according to one embodiment.

[0018] [Figure 9] 1A-1C are a set of timing diagrams according to one embodiment.

[0019] [Figure 10] 1A-1C are a set of timing diagrams according to one embodiment.

[0020] [Figure 11] FIG. 1 is a flow diagram according to one embodiment.

[0021] [Figure 12] 1 is a block diagram of a system for performing signaling between a wireless device and a network device according to embodiments disclosed herein. DETAILED DESCRIPTION OF THE INVENTION

[0022] Various embodiments are described in terms of a UE. However, reference to a UE is provided merely for purposes of illustration. The illustrative embodiments may be used with any electronic component, configured with hardware, software, and / or firmware, capable of establishing a connection to a network and exchanging information and data with the network. Accordingly, a UE as described herein is used to represent any suitable electronic component.

[0023] 1 illustrates an example architecture of a wireless communication system 100 according to embodiments disclosed herein. The following description is provided for the example wireless communication system 100 operating in conjunction with LTE system standards and / or 5G or NR system standards, as provided by the 3GPP technical specifications.

[0024] 1, wireless communication system 100 includes UE 102 and UE 104 (although any number of UEs may be used). In this example, UE 102 and UE 104 are shown as smartphones (e.g., handheld touchscreen mobile computing devices capable of connecting to one or more cellular networks), but may comprise any mobile or non-mobile computing devices configured for wireless communication.

[0025] The UEs 102 and 104 may be configured to be communicatively coupled to the RAN 106. In an embodiment, the RAN 106 may be an NG-RAN, an E-UTRAN, or the like. The UEs 102 and 104 utilize connections (or channels) with the RAN 106 (shown as connection 108 and connection 110, respectively), each of which comprises a physical communication interface. The RAN 106 may include one or more base stations, such as base station 112 and base station 114, that facilitate the connections 108 and 110.

[0026] In this example, connection 108 and connection 110 are air interfaces for enabling such communication coupling and may correspond to the RAT(s) used by RAN 106, such as, for example, LTE and / or NR.

[0027] In some embodiments, the UE 102 and the UE 104 may also directly exchange communication data via the sidelink interface 116. The UE 104 is configured to access an access point (shown as AP 118) via a connection 120, as shown. By way of example, the connection 120 may include a local wireless connection, such as a connection conforming to any IEEE 1202.11 protocol, and the AP 118 may include a Wi-Fi router. In this example, the AP 118 may be connected to other networks (e.g., the Internet) without going through the CN 122.

[0028] In an embodiment, the UEs 102 and 104 may be configured to communicate with each other or with the base stations 112 and / or 114 using orthogonal frequency division multiplexing (OFDM) communication signals over multi-carrier communication channels according to various communication technologies, such as, but not limited to, an orthogonal frequency division multiple access (OFDMA) communication technology (e.g., for downlink communication) or a single-carrier frequency division multiple access (SC-FDMA) communication technology (e.g., for uplink and ProSe or sidelink communication), and the scope of the embodiments is not limited in this respect. An OFDM signal may include multiple orthogonal subcarriers.

[0029] In some embodiments, all or a portion of the base station 112 or the base station 114 may be implemented as one or more software entities executing on a server computer as part of a virtual network. Additionally or in other embodiments, the base station 112 or the base station 114 may be configured to communicate with each other via the interface 124. In embodiments where the wireless communication system 100 is an LTE system (e.g., where the CN 122 is the EPC), the interface 124 may be an X2 interface. The X2 interface may be defined between two or more base stations (e.g., two or more eNBs) connecting to the EPC and / or between two eNBs connecting to the EPC. In embodiments where the wireless communication system 100 is an NR system (e.g., where the CN 122 is the 5GC), the interface 124 may be an Xn interface. The Xn interface may be defined between two or more base stations (e.g., two or more gNBs) connecting to 5GC, between the base station 112 (e.g., a gNB) and an eNB connecting to 5GC, and / or between two eNBs connecting to 5GC (e.g., the CN 122).

[0030] The RAN 106 is shown communicatively coupled to the CN 122. The CN 122 may comprise one or more network elements 126 configured to provide various data and telecommunication services to customers / subscribers (e.g., users of UEs 102 and 104) connected to the CN 122 via the RAN 106. The components of the CN 122 may be implemented in a single physical device or separate physical devices, including components for reading and executing instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium).

[0031] In an embodiment, the CN 122 may be an EPC, and the RAN 106 may be connected to the CN 122 via an S1 interface 128. In an embodiment, the S1 interface 128 may be divided into two parts: an S1 user plane (S1-U) interface that carries traffic data between the base station 112 or 114 and a serving gateway (S-GW), and an S1-MME interface that is a signaling interface between the base station 112 or 114 and a mobility management entity (MME).

[0032] In an embodiment, the CN 122 may be a 5GC, and the RAN 106 may be connected to the CN 122 via an NG interface 128. In an embodiment, the NG interface 128 may be divided into two parts: an NG-User Plane (NG-U) interface that carries traffic data between the base station 112 or 114 and a User Plane Function (UPF), and an S1 Control Plane (NG-C) interface that is a signaling interface between the base station 112 or 114 and an Access and Mobility Management Function (AMF).

[0033] In general, the application server 130 may be an element that provides applications that use Internet Protocol (IP) bearer resources (e.g., packet-switched data services) with the CN 122. The application server 130 may also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc.) for the UEs 102 and 104 via the CN 122. The application server 130 may communicate with the CN 122 via an IP communication interface 132.

[0034] A UE configured for 3GPP wireless communication is typically active for a paging cycle every 1.28 seconds (s). In contrast, a UE utilizing enhanced discontinuous reception (eDRX) is active for a paging cycle every 10.24 seconds, which saves power when the UE is connected to the network and in communication or idle. This eDRX mode (or simply eDRX) also allows the UE to communicate to the network that it wants to skip some predetermined number of these 10.24-second cycles, extending the paging interval up to 10,485.76 seconds. Thus, eDRX facilitates reduced power consumption for devices that are awake and connected / idle in the network.

[0035] At the RAN4#101-bis-e meeting, Radio Resource Management (RRM) mitigation mechanisms in eDRX mode were discussed. No consensus was reached. A summary of the relevant issues discussed is provided below.

[0036] Issue 2-2-4 under discussion was to consider options for eDRX when eDRX is up to 10.24 seconds (s). The following two options were proposed: According to the first option, the relaxed measurement requirements of Rel-16 / 17 can be applied with eDRX cycles up to 10.24 seconds without a paging transmission window (PTW, which is relatively long, i.e., on the order of 20 or 30 seconds). According to the second option, eDRX measurements can be decoupled from neighbor cell measurement mitigation, i.e., RRM neighbor cell measurement mitigation can be specified for DRX only.

[0037] Issue 2-2-5 under discussion was to consider eDRX with PTW. Accordingly, the following options were proposed: According to the first option, the maximum eDRX cycle with PTW for which a UE is allowed to apply the Rel-16 / 17 relaxed measurement requirements is X ms, where the value of X is for future study.

[0038] Based on previous agreement, when eDRX is up to 10.24 seconds, the PTW is not used for IDLE mode. When eDRX is greater than 10.24 seconds, the PTW is used for inactive mode. When inactive mode is used, eDRX can be configured up to 10.24 seconds, and therefore the PTW is not used for inactive mode.

[0039] The agreement for legacy eDRX RRM measurements (without mitigation) is as follows: For both FR1 and FR2, when eDRX longer than 10.24 seconds is used for an NR Reduced Capability (RedCap) UE in IDLE mode, (a) N of serving cell measurements serv (b) the number of samples (measured in DRX cycles) required for the intra-frequency or inter-frequency cell measurements must be included in a single PTW length; measure,NR / T evaluate,NR The number of samples required for the T must be contained in a single PTW length and the T for intra-frequency or inter-frequency cell measurements (measured in DRX cycles) detect,NR The number of samples required for can be divided among different PTWs.

[0040] Therefore, the present disclosure addresses several other issues, such as how to determine RRM mitigation based on eDRX without PTW (e.g., see the description with reference to Figures 2-5) and eDRX with PTW (e.g., see the description with reference to Figures 7-10).

[0041] First, note that the parameter k is a relaxation scaling factor for scaling the measurement interval between two samples, and the parameter k can be predefined in the specification or signaled by the network. For example, if two physical layer samples are required for one cell measurement, in the legacy case (i.e., without relaxation), two DRX cycles would be used to complete the measurement. However, in an example where the scaling factor k is equal to 3, the two DRX cycles are scaled by a factor of 3 so that six DRX cycles are used to complete the measurement.

[0042] When eDRX is configured to a maximum of 10.24 seconds and PTW is not used in IDLE and inactive mode, there are several options: The following options apply when the UE meets the legacy RRM mitigation criteria (for legacy DRX in IDLE and inactive mode) (see, e.g., 3GPP TS 38.133 sections 4.2.2.9 and 4.2.210 and the criteria shown in the table in Figure 4) for the mitigation scaling factor k (i.e., k applies to legacy DRX-based measurements):

[0043] To illustrate the first two options, Figure 2 includes a set of timing diagrams 200. The set of timing diagrams 200 shows a legacy DRX cycle 202 and a k (legacy RRM mitigation factor k 206 equal to 4) DRX cycle 203. * DRX cycle 204, eDRX cycle 208, and k * and a partial view of an eDRX cycle 210. The legacy RRM mitigation factor k 206 may have a value other than 4, and k * is shown applied to the legacy DRX cycle 202 to form the DRX cycle 204. Thus, Figure 2 illustrates a first option in which the UE follows the eDRX cycle 208 for RRM measurements regardless of the legacy RRM mitigation factor, e.g., legacy RRM mitigation factor k 206. Figure 2 also illustrates a first option in which the UE follows the eDRX cycle 208 for RRM measurements regardless of the legacy RRM mitigation factor, e.g., legacy RRM mitigation factor k 206. *A second option is shown in which the UE applies a legacy RRM mitigation factor k 206 on the eDRX cycle 208 so as to perform RRM measurements based on the eDRX cycle 210 .

[0044] 3 illustrates the third option as an example set of timing diagrams 300. The set of timing diagrams 300 shows a legacy DRX cycle 302 and a k * The eDRX cycle includes a DRX cycle 304 (where the legacy RRM mitigation factor k 306 is equal to 3), a first eDRX cycle 308, and a second eDRX cycle 310. The legacy RRM mitigation factor k 306 may have a value other than 3, and k * It is shown being applied to a legacy DRX cycle 302 to form a DRX cycle 304 .

[0045] According to option 3, the value of the eDRX cycle divided by the DRX cycle (i.e., the ratio of these values) is compared with the value of k. If (eDRX cycle) / (DRX cycle) is greater than or equal to k, the UE performs its RRM measurements based on eDRX without a relaxed scaling factor. Otherwise, if (eDRX cycle) / (DRX cycle) is less than k, the UE performs its RRM measurements based on eDRX without a relaxed scaling factor. * The UE performs its RRM measurements based on the DRX cycle. For example, the first eDRX cycle 308 divided by the legacy DRX cycle 302 is equal to 4, which is greater than the legacy RRM mitigation factor k 306. Therefore, the UE follows the timing of the first eDRX cycle 308 to perform RRM measurements. Conversely, the second eDRX cycle 310 divided by the legacy DRX cycle 302 is equal to 2, which is less than the legacy RRM mitigation factor k 306. Therefore, the UE follows the timing of the first eDRX cycle 308 to perform RRM measurements. * The timing of the DRX cycle 304 is followed.

[0046] 4 illustrates the fourth option as an example set of timing diagrams 400. The set of timing diagrams 400 shows a legacy DRX cycle 402 and a k *DRX cycle 404 (legacy RRM mitigation factor k 406 equals 3), eDRX cycle 408, and k * The legacy RRM mitigation factor k 406 may have a value other than 3, and k * The legacy RRM mitigation factor k 406 is also shown applied to the legacy DRX cycle 402 to form the DRX cycle 404. * It is shown applied to eDRX cycle 408 to form eDRX cycle 410.

[0047] According to option 4, the UE can artificially change the RRM mitigation criteria for eDRX 412. For example, if the legacy RRM mitigation factor k 406 is applied when the UE meets one criterion (neither the cell edge criterion 414 nor the stationary / low mobility criterion 416), then that k factor will be applied for eDRX-based RRM when both criteria 414, 416 are met.

[0048] "Not at cell edge" 414 means that the serving cell RSRP measurement is above a threshold. If the UE measured RSRP is above this threshold, the UE determines that this criterion is met.

[0049] "Low mobility" 416 means that the serving cell RSRP variation over a period of time is below a threshold. If the variation of the UE-measured RSRP over a period of time is below a threshold, the UE determines that this criterion is met.

[0050] When both are satisfied, the UE * The UE performs RRM measurements based on the eDRX cycle 410. Otherwise, or if only one criterion is met, the UE performs RRM measurements based on the eDRX cycle 408.

[0051] 5 illustrates the fourth option as an example set of timing diagrams 500. The set of timing diagrams 500 shows a legacy DRX cycle 502 and a k *DRX cycle 504 (legacy RRM mitigation factor k 506 equals 4), eDRX cycle 508, and k * eDRX cycle 510 and k' * The legacy RRM mitigation factor k 506 may have a value other than 4, and k * It is shown being applied to the legacy DRX cycle 502 to form the DRX cycle 504. Another factor k', different from the legacy RRM mitigation factor k 506, is applied to the eDRX cycle 508 to form k' * are shown forming an eDRX cycle 512.

[0052] According to option 5, in one embodiment, the network 514 indicates whether eDRX-based RRM measurements may be relaxed. For example, the network 514 indicates 516 to relax the eDRX cycle 508, where a legacy RRM relaxation factor k 506 is applied to the eDRX cycle 508 to relax k * In another embodiment, the network 514 configures the UE to generate the eDRX cycle 510. * An indication 518 is provided to indicate an individual relaxation factor k′ to be applied to the eDRX cycle 508 to perform RRM measurements based on the eDRX cycle 512. The indication 516 or 518 may be conveyed over system information, a broadcast channel, or a dedicated downlink channel.

[0053] To determine RRM mitigation based on eDRX with PTW, k * Depending on whether the relaxation scaling factor k is adopted so that the legacy measurement period is larger or smaller than the PTW, there are additional issues to consider. For example, k * If the legacy measurement period is greater than the PTW, the UE behavior / assumptions should be specified, e.g., the UE behavior can be differentiated between different use cases, such as between measurement / evaluation and cell detection. * If the legacy measurement period is less than the PTW, the UE behavior / assumptions should also be specified.

[0054] When eDRX is configured for longer than 10.24 seconds and a PTW is used in IDLE mode, there are several options. The following options apply when the UE meets the legacy RRM mitigation criteria (criteria defined for legacy DRX in IDLE mode) for the mitigation scaling factor k (i.e., k applies to legacy DRX-based measurements). As mentioned above, k may be pre-defined in the specification or signaled by the network.

[0055] 7 illustrates the first option with a set of timing diagrams 700. The set of timing diagrams 200 shows a legacy DRX cycle 602 and a k * The RRM measurement period includes a DRX cycle 604 and a PTW periodicity (eDRX cycle) 608. In this example, the RRM measurement period is 2 * This is Legacy DRX Cycle 602.

[0056] According to option 1, the UE preserves the PTW periodicity (eDRX cycle) 608 for RRM measurements regardless of the legacy RRM mitigation factor k 606. The measurement interval / periodicity within the PTW 610 is preserved as well, e.g., no mitigation is allowed when a PTW is used.

[0057] Figure 7 shows a second option with a set of timing diagrams 700. In this example, the legacy measurement period is 2 * This is Legacy DRX Cycle 702.

[0058] As shown at the top of FIG. 7, a relaxed measurement period 704 (a legacy measurement period) * If k) is greater than the length of the PTW 706, then no relaxation is allowed within each PTW window. Instead, as shown at the bottom of FIG. 7, a relaxed measurement period 704 (a legacy measurement period * If k) is less than or equal to the length of the PTW 708, the UE * RRM measurements are performed based on the legacy DRX cycle 702.

[0059] 8 illustrates a third option with another example set of timing diagrams 800. In this example, the legacy measurement period is 2 * A legacy DRX cycle 802. A relaxed measurement period 804 (legacy measurement period * If k) is greater than the length 806 of the PTW 808, the UE * To perform RRM measurement relaxation based on the legacy measurement period, k' is adopted, where k' is equal to the length 806 (in units of legacy DRX cycles 802) divided by the legacy measurement period (in units of legacy DRX cycles 802). * If k) is less than or equal to the PTW length, the UE * RRM measurements are performed based on the legacy DRX cycle 802.

[0060] 9 illustrates the fourth option as another example set of timing diagrams 900. In this example, the UE requires two samples to complete one measurement or one PHY filtering for the measurement. The time interval between the two samples is one legacy DRX cycle 902, and therefore the total legacy measurement period 904 is 2 * The legacy DRX cycle 902. If a legacy RRM relaxation factor k 906 is used (k=3 in the example), this scales the time interval between two samples. That is, one measurement period still requires two samples, but the relaxed measurement interval 908 between such samples is one legacy DRX cycle 902 to k * 1 * Legacy DRX Cycle 902, i.e., 3 * The legacy DRX cycle 902 is then scaled to the relaxed measurement period 910. In total, the relaxed measurement period 910 is then * "Sample interval", i.e., 2 * 3 *However, this relaxed measurement period 910 will exceed the existing PTW length 912. Therefore, option 4 is to use the relaxed measurement period 910 (6 * It provides an extended PTW length 914 to cover legacy DRX cycles 902).

[0061] 10 illustrates the fifth option as another example set of timing diagrams 1000. In this example, the UE will apply a legacy RRM mitigation factor k to the PTW periodicity (i.e., eDRX cycle), and the UE will apply a factor k * Implement extending the PTW periodicity based on the eDRX cycle. However, within each PTW, RRM measurements are still performed once per PTW. * Based on the DRX cycle.

[0062] FIG. 11 illustrates a flow diagram of a method 1100 performed by a user equipment (UE) for configuring radio resource management (RRM) mitigation in enhanced discontinuous reception (eDRX) mode.

[0063] At block 1102, method 1100 determines whether the eDRX cycle is configured as greater than or less than 10.24 seconds. The eDRX cycle information is configured in system information broadcast by the network. The determination at block 1102 may be made by checking previous eDRX configuration settings stored in memory.

[0064] In block 1104, method 1100 determines whether the UE satisfies legacy RRM mitigation criteria for mitigation scaling factor k. Example criteria are provided in the table of FIG. 4. For example, the legacy RRM mitigation criteria may be "not at cell edge" and / or "low mobility," and as long as the UE can satisfy one of them, the k mitigation factor may be used in the legacy case. The RRM mitigation criteria are configured in system information broadcast by the network. The determination in block 1104 may be made by checking previous eDRX configuration settings stored in memory.

[0065] At block 1106, method 1100 configures RRM relaxation timing based on use of a paging transmission window (PTW) and a relaxation scaling factor k. For example, if the eDRX cycle is less than or equal to 10.24 seconds and at least one criterion is met, the UE may configure RRM relaxation based on the techniques previously described with reference to FIGS. 2-5. Method 1100 may also include, in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in IDLE or inactive mode, configuring the RRM relaxation timing to follow the eDRX cycle regardless of the relaxation scaling factor k. Method 1100 may also include, in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in IDLE or inactive mode, configuring the RRM relaxation timing by applying the relaxation scaling factor k to the eDRX cycle to perform RRM measurements based on the relaxation scaling factor k applied to the eDRX cycle. Method 1100 may also include configuring RRM mitigation timing based on a comparison of a mitigation scaling factor to a ratio between the eDRX cycle and the legacy DRX cycle in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in IDLE or inactive mode. Method 1100 may also include determining that multiple mitigation criteria are met in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in IDLE or inactive mode, the multiple mitigation criteria including the UE not being at a cell edge and the UE being stationary or having low mobility, and performing RRM measurements based on the mitigation scaling factor k applied to the eDRX cycle. Method 1100 may also include receiving an instruction from the network to relax RRM measurements based on the mitigation scaling factor k or a respective scaling factor k′ applied to the eDRX cycle in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in IDLE or inactive mode.

[0066] In contrast, if the eDRX cycle is greater than 10.24 seconds and at least one criterion is satisfied, the UE may configure RRM mitigation based on the techniques previously described with reference to FIGS. 6-10. Method 1100 may also include, in response to the eDRX cycle being greater than 10.24 seconds and the PTW being used in IDLE mode, retaining a PTW periodicity corresponding to the eDRX cycle for RRM measurements. Method 1100 may also include, in response to the eDRX cycle being greater than 10.24 seconds and the PTW being used in IDLE mode, determining whether a relaxed measurement period corresponding to a mitigation scaling factor k applied to the legacy measurement period is greater than the length of the PTW. Method 1100 may also include, in response to the relaxed measurement period being greater than the length of the PTW, not configuring mitigation within each PTW. Method 1100 may also include, in response to the relaxed measurement period being greater than the length of the PTW, employing another scaling factor k' to perform the RRM measurement relaxation, where k' is equal to the length of the PTW in units of the legacy DRX cycle divided by the legacy measurement period in units of the legacy DRX cycle. Method 1100 may also include, in response to the relaxed measurement period being greater than the length of the PTW, employing another scaling factor k' to perform the RRM measurement relaxation. * The method 1100 may also include, in response to the eDRX cycle being greater than 10.24 seconds and the PTW being used in IDLE mode, applying a relaxation scaling factor k to a PTW periodicity corresponding to the eDRX cycle, and performing RRM measurements within each PTW based on one legacy DRX cycle as a measurement interval.

[0067] 12 illustrates a system 1200 for performing signaling 1202 between a wireless device 1204 and a network device 1206 according to embodiments disclosed herein. The system 1200 may be part of a wireless communication system as described herein. The wireless device 1204 may be, for example, a UE of the wireless communication system. The network device 1206 may be, for example, a base station (e.g., eNB or gNB) of the wireless communication system.

[0068] The wireless device 1204 may include one or more processor(s) 1208. The processor(s) 1208 may execute instructions to perform various operations of the wireless device 1204, as described herein. The processor(s) 1208 may include, for example, one or more baseband processors implemented using 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.

[0069] The wireless device 1204 may include a memory 1210. The memory 1210 may be a non-transitory computer-readable storage medium that stores instructions 1212 (e.g., may include instructions being executed by the processor(s) 1208). The instructions 1212 may also be referred to as program code or computer programs. The memory 1210 may also store data used by the processor(s) 1208 and results computed by the processor(s) 1208.

[0070] The wireless device 1204 may include one or more transceiver(s) 1214, which may include radio frequency (RF) transmitter and / or receiver circuitry using an antenna 1216 of the wireless device 1204, to facilitate signaling (e.g., signaling 1202) to and / or from the wireless device 1204 with other devices (e.g., network device 1206) according to a corresponding RAT.

[0071] The wireless device 1204 may include one or more antennas 1216 (e.g., one, two, four, or more). In embodiments with multiple antenna(s) 1216, the wireless device 1204 may exploit the spatial diversity of such multiple antennas 1216 to transmit and / or receive multiple different data streams over the same time and frequency resources. This behavior is sometimes referred to, for example, as multiple-input multiple-output (MIMO) behavior (referring to the multiple antennas used at each of the transmitting and receiving devices that enable this aspect). MIMO transmission by the wireless device 1204 may be achieved in accordance with precoding (or digital beamforming) applied at the wireless device 1204 that multiplexes data streams across the antennas 1216 according to known or assumed channel characteristics such that each data stream is received at a desired location in the spatial domain (e.g., the location of a receiver associated with that data stream) with an appropriate signal strength relative to the other streams. Some embodiments may use Single-User MIMO (SU-MIMO) methods (in which data streams are all directed to a single receiver) and / or Multi-User MIMO (MU-MIMO) methods (in which individual data streams may be directed to individual (different) receivers in different locations in the spatial domain).

[0072] In some embodiments with multiple antennas, the wireless device 1204 may implement analog beamforming techniques whereby the phases of the signals sent by the antennas 1216 are adjusted relatively so that the (joint) transmissions of the antennas 1216 can be directed (this may be referred to as beam steering).

[0073] The wireless device 1204 may include one or more interfaces 1218. The interfaces 1218 may be used to provide input to or output from the wireless device 1204. For example, a wireless device 1204 that is a UE may include an interface 1218 such as a microphone, speaker, touchscreen, buttons, etc. to enable a user of the UE to provide input and / or output to the UE. Other interfaces of such a UE may consist of transmitters, receivers, and other circuitry (e.g., other than the transceiver 1214 / antenna 1216 already described) that enable communication between the UE and other devices and may operate according to known protocols (e.g., Wi-Fi, Bluetooth, etc.).

[0074] The wireless device 1204 may include an RRM measurement module 1220. The RRM measurement module 1220 may be implemented via hardware, software, or a combination thereof. For example, the RRM measurement module 1220 may be implemented as a processor, circuitry, and / or instructions 1212 stored in memory 1210 and executed by the processor 1208. In some examples, the RRM measurement module 1220 may be integrated within the processor(s) 1208 and / or transceiver(s) 1214. For example, the RRM measurement module 1220 may be implemented by a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuits) within the processor 1208 or transceiver 1214.

[0075] The RRM measurement module 1220 may be used for various aspects of the disclosure, e.g., aspects of FIGS. 1-11. In some embodiments, the RRM measurement module 1220 is configured to facilitate capability exchange and configuration of eDRX-based RRM mitigation. Embodiments contemplated herein include an apparatus comprising means for performing one or more elements of the method 1100 (FIG. 11). The apparatus may be, for example, an apparatus of a UE (such as the wireless device 1204, which is a UE as described herein).

[0076] Embodiments contemplated herein may include one or more non-transitory computer-readable media containing instructions that, when executed by one or more processors of the electronic device, cause the electronic device to perform one or more elements of method 1100 (FIG. 11). The non-transitory computer-readable medium may be, for example, a memory of a UE (such as memory 1210 of wireless device 1204 that is a UE, as described herein).

[0077] Embodiments contemplated herein include an apparatus comprising logic, modules, or circuitry that performs one or more elements of method 1100 (FIG. 11). The apparatus may be, for example, an apparatus of a UE (such as wireless device 1204, which is a UE as described herein).

[0078] Embodiments contemplated herein include an apparatus comprising one or more processors and one or more computer-readable media containing instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 1100 (FIG. 11). The apparatus may be, for example, an apparatus of a UE (such as wireless device 1204, which is a UE as described herein).

[0079] Embodiments contemplated herein include a computer program or computer program product including instructions, where execution of the program by a processor causes the processor to perform one or more elements of method 1100 (FIG. 11). The processor may be a processor of a UE (such as processor(s) 1208 of wireless device 1204 that is a UE, as described herein). These instructions may be located, for example, within the processor and / or on a memory of the UE (such as memory 1210 of wireless device 1204 that is a UE, as described herein).

[0080] The network device 1206 may include one or more processors 1222. The processor 1222 may execute instructions to perform various operations of the network device 1206, as described herein. The processor 1222 may include, for example, one or more baseband processors implemented using 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.

[0081] The network device 1206 may include a memory 1224. The memory 1224 may be a non-transitory computer-readable storage medium that stores instructions 1226 (e.g., may include instructions being executed by the processor(s) 1222). The instructions 1226 may also be referred to as program code or computer programs. The memory 1224 may also store data used by the processor(s) 1222 and results computed by the processor(s) 1222.

[0082] The network device 1206 may include one or more transceiver(s) 1228, which may include RF transmitter and / or receiver circuitry using an antenna 1230 of the network device 1206, to facilitate signaling (e.g., signaling 1202) to and / or from the network device 1206 with other devices (e.g., the wireless device 1204) according to a corresponding RAT.

[0083] The network device 1206 may include one or more antenna(s) 1230 (e.g., one, two, four, or more). In embodiments with multiple antennas 1230, the network device 1206 may perform MIMO, digital beamforming, analog beamforming, beamsteering, etc., as described.

[0084] The network device 1206 may include one or more interface(s) 1232. The interface(s) 1232 may be used to provide input to or output from the network device 1206. For example, a network device 1206 that is a base station may include an interface 1232 consisting of a transmitter, a receiver, and other circuitry (e.g., other than the transceiver 1228 / antenna 1230 already described) that enables the base station to communicate with other equipment in the core network and / or to communicate with external networks, computers, databases, etc., for purposes of operation, management, and maintenance of the base station or other equipment operatively connected thereto.

[0085] The network device 1206 may include an RRM configuration module 1234. The RRM configuration module 1234 may be implemented via hardware, software, or a combination thereof. For example, the RRM configuration module 1234 may be implemented as a processor, circuitry, and / or instructions 1226 stored in memory 1224 and executed by the processor(s) 1222. In some examples, the RRM configuration module 1234 may be integrated within the processor(s) 1222 and / or transceiver(s) 1228. For example, the RRM configuration module 1234 may be implemented by a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuits) within the processor 1222 or transceiver 1228.

[0086] The RRM configuration module 1234 may be used for various aspects of the disclosure, such as the aspects of FIGS. 1 and 5, or other network functions that may include receiving RRM measurements.

[0087] For one or more embodiments, at least one of the components depicted in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods as described herein. For example, a baseband processor described above in connection with one or more of the figures herein may be configured to operate according to one or more of the examples described herein. As another example, circuitry associated with a UE, a base station, a network element, etc., as described above in connection with one or more of the foregoing figures, may be configured to operate according to one or more of the examples described herein.

[0088] Any of the above embodiments can be combined with any other embodiment (or combination of embodiments) unless otherwise stated. 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 the 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.

[0089] Embodiments and implementations of the systems and methods described herein may include various operations that may be embodied in machine-executable instructions executed by a computer system. The 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 contain specific logic for performing the operations, or may include a combination of hardware, software, and / or firmware.

[0090] It should be appreciated that the systems described herein include descriptions of specific embodiments. These embodiments may be combined into a single system, partially combined into other systems, divided into multiple systems, or otherwise divided or combined. Additionally, it is contemplated that parameters, attributes, aspects, etc. of one embodiment may be used in another embodiment. It is recognized that parameters, attributes, aspects, etc. are described in one or more embodiments for clarity only, and that parameters, attributes, aspects, etc. may be combined with or substituted for parameters, attributes, etc. of other embodiments, unless specifically disclaimed herein.

[0091] It is well understood that the use of personal information should comply with generally recognized privacy policies and practices that meet or exceed industry or government requirements for maintaining user privacy. In particular, personal information data should be managed and handled in a manner that minimizes the risk of unintended or unauthorized access or use, and the nature of authorized uses should be clearly indicated to users.

[0092] While the foregoing has been described in some detail for clarity, it will be apparent that certain changes and modifications can be made without departing from the principles thereof. It should be noted that there are many alternative ways of implementing both the processes and apparatus described herein. Accordingly, the present embodiments are to be considered as illustrative and not restrictive, and the description is not to be limited to the details given herein, but may be modified within the scope of the appended claims and their equivalents.

Claims

1. 1. A method performed by a user equipment (UE) for configuring radio resource management (RRM) mitigation in an enhanced discontinuous reception (eDRX) mode, the method comprising: determining whether an eDRX cycle is configured as greater than or less than 10.24 seconds; determining whether the UE meets legacy RRM mitigation criteria for a mitigation scaling factor k; configuring an RRM mitigation timing based on a paging transmission window (PTW) and use of the mitigation scaling factor k; A method comprising:

2. 2. The method of claim 1, further comprising: in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in an IDLE or inactive mode, configuring the RRM mitigation timing to follow the eDRX cycle regardless of the mitigation scaling factor k.

3. 2. The method of claim 1, wherein, in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in an IDLE or inactive mode, the method further includes configuring the RRM mitigation timing by applying the mitigation scaling factor k to the eDRX cycle to perform RRM measurements based on the mitigation scaling factor k applied to the eDRX cycle.

4. 2. The method of claim 1, wherein, in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in an IDLE or inactive mode, the method further comprises configuring the RRM mitigation timing based on a comparison of the mitigation scaling factor to a ratio between the eDRX cycle and a legacy DRX cycle.

5. In response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in an IDLE or inactive mode, the method: determining that a plurality of mitigation criteria are met, the mitigation criteria including the UE not being at a cell edge and the UE being stationary or having low mobility; 2. The method of claim 1, further comprising: performing RRM measurements based on the mitigation scaling factor k applied to the eDRX cycle.

6. 2. The method of claim 1, wherein, in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in IDLE or inactive mode, the method further comprises receiving an instruction from a network to relax RRM measurements based on the relaxation scaling factor k or an individual scaling factor k′ applied to the eDRX cycle.

7. 2. The method of claim 1, wherein, in response to the eDRX cycle being greater than 10.24 seconds and the PTW being used in IDLE mode, the method further comprises retaining a PTW periodicity corresponding to the eDRX cycle for RRM measurements.

8. 2. The method of claim 1, wherein, in response to the eDRX cycle being greater than 10.24 seconds and the PTW being used in IDLE mode, the method further includes determining whether a relaxed measurement period corresponding to the relaxed scaling factor k applied to a legacy measurement period is greater than a length of the PTW.

9. The method of claim 8 , wherein in response to the relaxed measurement period being greater than the length of the PTW, the method further comprises: configuring no relaxation within each PTW.

10. 9. The method of claim 8, wherein in response to the relaxed measurement period being greater than the length of the PTW, the method further includes employing another scaling factor k′ to perform RRM measurement relaxation, where k′ is equal to the length of the PTW in units of a legacy DRX cycle divided by the legacy measurement period in units of the legacy DRX cycle.

11. In response to the relaxed measurement period being greater than the length of the PTW, the method comprises: scaling the PTW by the relaxed scaling factor k * The method of claim 8 , further comprising extending the legacy measurement period.

12. In response to the eDRX cycle being greater than 10.24 seconds and the PTW being used in IDLE mode, the method comprises: applying the relaxation scaling factor k to a PTW periodicity corresponding to the eDRX cycle; The method of claim 1 , further comprising: performing RRM measurements within each PTW based on one legacy DRX cycle as a measurement interval.

13. 1. A non-transitory computer-readable storage medium of a user equipment (UE) for configuring radio resource management (RRM) mitigation in an enhanced discontinuous reception (eDRX) mode, the computer-readable storage medium comprising instructions that, when executed by the UE, cause the UE to: determining whether the eDRX cycle is configured as greater than or less than 10.24 seconds; determining whether the UE satisfies a legacy RRM mitigation criterion for a mitigation scaling factor k; A non-transitory computer-readable storage medium for configuring RRM mitigation timing based on use of a paging transmission window (PTW) and the mitigation scaling factor k.

14. 14. The computer-readable storage medium of claim 13, wherein, in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in an IDLE or inactive mode, the instructions further cause the UE to configure the RRM mitigation timing to follow the eDRX cycle regardless of the mitigation scaling factor k.

15. 14. The computer-readable storage medium of claim 13, wherein, in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in an IDLE or inactive mode, the instructions further cause the UE to configure the RRM mitigation timing by applying the mitigation scaling factor k to the eDRX cycle to perform RRM measurements based on the mitigation scaling factor k applied to the eDRX cycle.

16. 14. The computer-readable storage medium of claim 13, wherein, in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in an IDLE or inactive mode, the instructions further cause the UE to configure the RRM mitigation timing based on a comparison of the mitigation scaling factor to a ratio between the eDRX cycle and a legacy DRX cycle.

17. In response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in IDLE or inactive mode, the instructions may further instruct the UE to: determining that a plurality of mitigation criteria are met, the mitigation criteria including that the UE is not at a cell edge and that the UE is stationary or has low mobility; The computer-readable storage medium of claim 13 , wherein RRM measurements are performed based on the relaxation scaling factor k applied to the eDRX cycle.

18. 14. The computer-readable storage medium of claim 13, wherein, in response to the eDRX cycle being less than or equal to 10.24 seconds and the PTW not being used in IDLE or inactive mode, the instructions further cause the UE to receive from a network an instruction to relax RRM measurements based on the relaxation scaling factor k or an individual scaling factor k′ applied to the eDRX cycle.

19. 14. The computer-readable storage medium of claim 13, wherein, in response to the eDRX cycle being greater than 10.24 seconds and the PTW being used in IDLE mode, the instructions further cause the UE to maintain a PTW periodicity corresponding to the eDRX cycle for RRM measurements.

20. 14. The computer-readable storage medium of claim 13, wherein, in response to the eDRX cycle being greater than 10.24 seconds and the PTW being used in IDLE mode, the instructions further cause the UE to determine whether a relaxed measurement period corresponding to the relaxed scaling factor k applied to a legacy measurement period is greater than a length of the PTW.

21. 21. The computer-readable storage medium of claim 20, wherein in response to the relaxed measurement period being greater than the length of the PTW, the instructions cause the UE to not further configure relaxation within each PTW.

22. 21. The computer-readable storage medium of claim 20, wherein in response to the relaxed measurement period being greater than the length of the PTW, the instructions further cause the UE to employ another scaling factor k′ to perform RRM measurement relaxation, where k′ is equal to the length of the PTW in units of a legacy DRX cycle divided by the legacy measurement period in units of the legacy DRX cycle.

23. In response to the relaxed measurement period being greater than the length of the PTW, the instructions further instruct the UE to scale the PTW by the relaxed scaling factor k * The computer-readable storage medium of claim 20 , wherein the legacy measurement period is extended.

24. In response to the eDRX cycle being greater than 10.24 seconds and the PTW being used in IDLE mode, the instructions may further instruct the UE to: applying the relaxation scaling factor k to a PTW periodicity corresponding to the eDRX cycle; The computer-readable storage medium of claim 13 , wherein RRM measurements are performed within each PTW based on one legacy DRX cycle as a measurement interval.

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