Method for paging in wireless communications

Abstract

Systems, apparatuses, and methods for wireless communication are described, and more particularly, techniques related to reducing power consumption during paging are described. An example method for wireless communication includes receiving, at a wireless device, paging configuration information associated with a paging message, and monitoring the paging message based on the paging configuration information. The paging configuration information may indicate a paging indication channel and / or a paging occasion. The method may reduce power consumption during paging by reducing the time for a wireless device to monitor a paging message.

Description

[0001] This application is a divisional application of the invention patent application with application number 202180096596.8, application date August 6, 2021, and invention name “Method for paging in wireless communication”. Technical Field

[0002] This document is generally directed to wireless communications. Background Art

[0003] Wireless communication technology is pushing the world towards an increasingly connected and networked society. The rapid development of wireless communications and technological advances have led to greater demands for capacity and connectivity. Other aspects such as energy consumption, equipment cost, spectrum efficiency, and latency are also important to meet the needs of various communication scenarios. Compared with existing wireless networks, next-generation systems and wireless communication technologies need to support an increasing number of users and devices and support an increasingly mobile society. Summary of the invention

[0004] The present document relates to methods, systems and devices for reducing power consumption during paging in mobile communication technologies, including fifth generation (5G), new radio (NR), fourth generation (4G), and long term evolution (LTE) communication systems.

[0005] In one exemplary aspect, a wireless communication method is disclosed. The method includes receiving, at a wireless device, paging configuration information associated with a paging message and monitoring the paging message based on the paging configuration information.

[0006] In another exemplary aspect, a wireless communication method is disclosed, which includes sending, by a network device, paging configuration information associated with a paging message, and sending the paging message according to the paging configuration information.

[0007] In yet another exemplary aspect, the above method is embodied in the form of processor executable code and stored in a computer readable program medium.

[0008] In yet another exemplary embodiment, a device configured or operable to perform the above method is disclosed.

[0009] The above and other aspects and their implementations are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 An example of a wireless communication system including a base station (BS) and a user equipment (UE) is shown.

[0011] Figure 2 An exemplary paging cycle is shown.

[0012] Figure 3 An exemplary paging cycle including a paging indication is shown.

[0013] Figure 4 An exemplary Paging Early Indication (PEI) is shown.

[0014] Figure 5 An exemplary bit field structure is shown.

[0015] Figure 6 An exemplary bit field structure is shown.

[0016] Figure 7 An exemplary bit field structure is shown.

[0017] Figure 8 An exemplary bit field structure is shown.

[0018] Fig. 9 An exemplary bit field structure is shown.

[0019] Fig.10 An example method is shown.

[0020] Fig.11 An example method is shown.

[0021] Fig.12 is a block diagram representation of a portion of an apparatus that can be used to implement the methods and / or techniques of the presently disclosed technology. DETAILED DESCRIPTION

[0022] The section headings used in this document are intended only to improve readability and do not limit the scope of the embodiments and techniques disclosed in each section to that section. Certain functions are described using the fifth generation (5G) wireless protocol as an example. However, the applicability of the disclosed techniques is not limited to 5G wireless systems.

[0023] Figure 1 An example of a wireless communication system (e.g., Long Term Evolution (LTE), 5G, or NR cellular network) including a BS 120 and one or more user equipments (UEs) 111, 112, and 113 is shown. In some embodiments, uplink transmissions (131, 132, 133) may include uplink control information (UCI), higher layer signaling (e.g., UE assistance information or UE capabilities), or uplink information. In some embodiments, downlink transmissions (141, 142, 143) may include DCI or higher layer signaling or downlink information. The UE may be, for example, a smartphone, a tablet, a mobile computer, a machine-to-machine (M2M) device, a terminal, a mobile device, an Internet of Things (IoT) device, etc.

[0024] This document uses section titles and subtitles to facilitate understanding, rather than to limit the scope of the disclosed techniques and embodiments to a particular section. Therefore, the embodiments disclosed in different sections can be used interchangeably. In addition, this document only uses examples from the 3GPP NR network architecture and 5G protocols to aid understanding, and the disclosed techniques and embodiments can be implemented in other wireless systems that use communication protocols other than the 3GPP protocols.

[0025] During the paging occasion (PO) of the paging cycle, a user equipment (UE) in the radio resource control (RRC) idle state (RRC_Idle) or RRC inactive state (RRC_Inactive) monitors the physical downlink control channel (PDCCH), which schedules a paging message, even if the paging message is not indicated for the specific UE. Similarly, the physical downlink shared channel (PDSCH) may not transmit a paging message for the UE. Even so, the UE must receive and decode the PDCCH or PDSCH during a paging cycle. This operation generates some unnecessary power consumption.

[0026] During a PO, for example, if the network schedules multiple paging messages at once, but the content of the corresponding PDSCH does not include the actual paging message for the UE, the PDCCH can indicate that the UE has a paging message on the PDSCH. This situation will also cause unnecessary power consumption.

[0027] In 5G, discontinuous reception (DRX) is a technology that does not require the UE to continuously receive signals or channels from the BS. The UE can intermittently receive signals for a period of time and stop receiving in another period of time. A DRX cycle includes an ON duration (DRX-ON) and an OFF duration (DRX-OFF) of the DRX cycle. For a UE in the RRC_Connected state, the UE will apply DRX in connected mode (C-DRX). For a UE in the RRC_Idle or RRC_Inactive state, the UE will apply DRX for idle mode (I-DRX).

[0028] For a UE in RRC_Idle or RRC_Inactive state, the UE monitors for possible paging during the PO of each paging cycle. In one example, the PDCCH does not schedule a paging message for the UE. In another example, the PDCCH schedules a paging message for the UE, but the UE does not receive the PDSCH. In yet another example, the PDCCH schedules a paging message, but the PDSCH does not transmit a paging message for the particular UE. In each of the above cases, a method of reducing the power consumption of the UE is needed.

[0029] Before receiving PO, the UE in RRC_Idle or RRC_Inactive state detects the synchronization signal block (SSB) signal, which can be used for synchronization (SYNC) and automatic gain control (AGC). The period of SSB is usually 20ms. When PO is far away from SSB relative to this period, for example 19ms, the UE must be awakened in advance to receive SSB, thereby performing SYNC and AGC before PO, which wastes energy.

[0030] Therefore, paging can be improved by sharing the configuration information of the channel state information reference signal (CSI-RS) of a UE in the RRC_Connected state with a UE in the RRC_Idle or RRC_Inactive state. Currently, the UE in the RRC_Idle or RRC_Inactive state is unaware of the CSI-RS configured for the RRC_Connected UE. However, sharing the configuration information of the CSI-RS can generate a large amount of signaling overhead. Therefore, a method of reducing the overhead of transmitting the CSI-RS configuration information is needed.

[0031] Methods are introduced that allow a UE to know more accurately whether it will receive a paging message, thereby reducing unnecessary paging and UE power consumption.

[0032] Figure 2 An exemplary paging cycle is shown. In the current NR, a UE in the RRC_Idle or RRC_Inactive state receives a paging message in each paging cycle. The paging message is transmitted on the PDSCH, which is scheduled by the corresponding PDCCH (also called "paging PDCCH"). However, the paging message may not be applicable to the UE. That is, the paging message does not contain the 5th generation system temporary mobile subscription identifier (5G-S-TMSI) of the UE. In this case, a false alarm will occur. The false alarm will waste the energy of the UE. If the false alarm can be avoided, the UE can save power consumption.

[0033] Figure 3 An exemplary paging cycle including a paging indication is shown. Before the UE receives a paging message, the paging indication information (also referred to as "paging configuration information") may inform the UE that it may skip receiving the paging message, including skipping the paging PDCCH, thereby avoiding false alarms. The paging indication information may indicate a paging indication channel and / or a paging occasion. The paging indication information may be transmitted on a paging early indication (PEI) signal / channel (e.g., a wake-up signal / channel (WUS)) and / or a paging scheduling channel (e.g., a paging PDCCH).

[0034] Example 1

[0035] Figure 4An exemplary PEI is shown. If the PEI (eg, WUS) is based on PDCCH, there may be some bits for indicating the PO and / or PO group. Figure 4 As shown, one PEI can indicate one PO or multiple POs. Each PO can include multiple PO groups.

[0036] A PEI may have N*M bits to indicate PO and PO group, where N is the number of POs associated with the PEI, and M is the number of PO groups within the PO. The values ​​of N and M may be configured by a higher layer (e.g., RRC layer). Therefore, PEI may have a variety of bit field structures.

[0037] Structure 1

[0038] Figure 5 An exemplary bit field structure 500 is shown. The structure indicates N POs, and uses N*M bits for the M PO groups in each PO. With this structure, there can be one bit for each group in the PO. Therefore, each PO and each group in the PO may be indicated separately. For example, if there are N=4 POs and M=8 groups in the POs, the PO indication will have N*M=4*8=32 bits. In some embodiments, if the bit is "1", the associated PO group is paged, and if the bit is "0", the PO group is not paged. In addition, a P-bit cyclic redundancy check (CPC) (e.g., P=8 or P=16 is sufficient for a target false alarm rate of 1%) can be appended after these indication bits.

[0039] It should be noted that a group can be equated with a subgroup if this does not cause confusion.

[0040] In some embodiments, different POs may have different numbers of groups (i.e., different numbers of bits used for the groups). For example, PO 1 may have 4 groups (i.e., 4 bits), while PO 2 may have 8 groups (i.e., 8 bits). In addition, different groups may also have different numbers of bits.

[0041] The paging occasion may include one or more monitoring occasions (MOs). An MO may include a paging PDCCH. Similar to PEI / WUS, paging indication information may also be included in the paging PDCCH, including Figure 5 The bit field structure is shown.

[0042] In some embodiments, a bit may be associated with the i-th group, and a bit "1" may indicate that the i-th group is addressed or paged, where i=1, 2, . . . , M.

[0043] In some embodiments, the paging PDCCH may transmit bits for indication of PO and / or PO groups. The paging PDCCH on PO may transmit a bit structure for indication of PO and / or PO groups, such as the structure disclosed herein. In some embodiments, both the PEI / WUS and the paging PDCCH on PO may transmit bits for indication of PO and / or PO groups. In some embodiments, the PEI / WUS and the paging PDCCH may simultaneously transmit bits for indication of PO and / or PO groups.

[0044] Structure 2

[0045] Figure 6 An exemplary bit field structure 600 is shown. The structure indicates N POs with flexible N+N*M bits (for group indication). In the structure, the first N bits of the block 602 associated with the N POs are always present, while the last N*M bits may not be present. If the i-th bit in the block 602 is "1", there may be a block of M bits corresponding to the i-th PO, where i=1, 2, ..., N. Otherwise, for example, if the i-th bit of the block 602 is "0", there may not be a block of M bits corresponding to the i-th bit. For example, if the first bit in the block 602 is "1" (e.g., at least one group within PO 1 is to be paged), then PO 1 may have a block 604 of M bits, such as Figure 6 Otherwise, there is no such M-bit block. For example, if N=3 POs and M=4 PO groups, there can be 3 bits or 7 bits or 11 bits or 15 bits in the block structure (i.e., N+l=4 possible bit field lengths).

[0046] In some embodiments, if the first bit in the block is "0" (eg, at least one group within PO 1 is to be paged), there may be an M-bit block for PO 1. Otherwise, there is no M-bit block.

[0047] Through this structure, the overhead of the bit field length can be reduced and the coverage of PEI / WUS can be improved.

[0048] In some embodiments, the structure may be fixed. That is, regardless of whether the i-th bit in block 602 is "1", the corresponding block of M bits of the i-th PO always exists. In some embodiments, the M-bit block corresponding to the bit "0" in block 602 may act as a virtual CRC when decoding (e.g., these M bits may all be set to zero).

[0049] In some embodiments, the state of a bit in block 602, such as the decimal value of the bit, may determine whether the corresponding i-th block is addressed, i=1, 2, ..., N. This may be a fixed structure. For example, if there are M=4 paging groups and the length of block 602 is N=log2(M)=2, then the value "10" may indicate that the first 2 POs will be paged because the decimal value of these 2 bits is 2, and any other POs are not addressed.

[0050] In this flexible structure, the number of blocks (i.e., N) and the number of groups (i.e., M) can be configured by a higher layer (e.g., RRC layer). Alternatively, the value of N or M can be changed based on some conditions. For example, if the number of POs in each paging frame is four, then in the first PO, N and M can remain unchanged, but in the second, third, and fourth POs, N and M can be changed to 1 / 2, 1 / 4, and 1 / 8 of the original values, respectively. That is, a subset of N and / or M is selected. Through this structure, the total number of bits can be reduced and the coverage of PEI / WUS can be improved.

[0051] Structure 3

[0052] Figure 7 An exemplary bit field structure 700 is shown. The structure 700 can be used with a flexible N+M*2 N bit (for group indication) to indicate 2 N POs.

[0053] Similar to Figure 6 The structure 600 shown includes a block 702 in which the first N bits are always present, while the following M bits of the block may not be present. N POs, so there can be up to 2 N A code point, such as a decimal bit value, may indicate a PO or group. In some embodiments, if the decimal value of the first block 702 is greater than or equal to 1, there may be an M-bit block corresponding to PO 1. If the decimal value of the first block 702 is greater than or equal to 2, there may be another M-bit block corresponding to PO 2. This may continue for up to 2 N A higher number of POs.

[0054] In some embodiments, the decimal value of the first block 702 may indicate zero PO. In some embodiments, the decimal value of the first block 702 being zero may indicate all PO. In some embodiments, a decimal value greater than a predetermined value (e.g., 2) will indicate all PO.

[0055] The floating structure (or flexible structure) 700 may also be fixed, that is, no matter what the decimal value of the bits in the first block 702 is, the subsequent blocks always exist.

[0056] Structure 4

[0057] Figure 8 An exemplary bit field structure 800 is shown. The structure 800 can be used N*log 2 (M) bits (for group indication) are used to indicate N POs.

[0058] Similar to Figure 7 The structure 700, structure 800 uses code points, such as decimal values ​​of bits, to indicate groups within a PO. In some embodiments, if the decimal value of the bit is zero, no group (e.g., UE group or PO group) is indicated. In some embodiments, if all bits are "1", all groups may be indicated. In other cases, PO groups may be addressed or indicated according to the following code points:

[0059]

[0060] For example, if there are M=8 PO groups, the following table may be used to indicate the PO group using 3 bits for each PO.

[0061] log2(8)=3 bits Code point (decimal value of the bit) instruct 000 0 No groups will be indicated. 001 1 The first group will be instructed. 010 2 The second group will be instructed. 011 3 The third group will be instructed. 100 4 The fourth group will be instructed. 101 5 The fifth group will be instructed. 110 6 The sixth group will be instructed. 111 7 All groups will be indicated.

[0062] Note that in this table, there is no entry corresponding to "the seventh group will be indicated". In some embodiments, the table can be configured to include this entry. Other combinations of indicating PO groups can be configured, as there are more than 2 groups that can be indicated. N A combination of PO groups.

[0063] In this structure, each group uses only log2(M) bits, which can reduce bit overhead and improve base station coverage.

[0064] Structure 5

[0065] In some embodiments, M bits (for group indication) can be used to indicate N POs (i.e., a total of M bits). This may occur if all N POs have the same indication content. This may apply when the N POs are associated with one UE or UE identification (UE ID), or if the N POs are associated with UEs within a group or UE IDs within a group. In some embodiments, "1" in the i-th bit indicates that the i-th group is addressed or paged for all POs, where i = 1, 2, ..., M. This structure is helpful for reduced capability (RedCap) UEs because RedCap UEs require low cost, low complexity, or low power consumption. By using only M bits to indicate the group, this structure requires less data to be processed.

[0066] Structure 6

[0067] In some embodiments, N bits may indicate N POs, and M bits are used for group indication (i.e., a total of N+M bits). The first N bits may indicate which of the N POs will be addressed. The next M bits may indicate M PO groups of all POs addressed by the first N bits. That is, each addressed PO will indicate a PO group of the same order, respectively. For example, if M=3, and the M bits read "101", the first and third groups will be indicated for each PO indicated by the first N bits.

[0068] Structure 7

[0069] In some embodiments, N POs with M groups can be ceil(log 2 (N))+M bits. In this way, one or more POs can be addressed. For example, if N=4, the first ceil(log2(N))=2 bits can indicate the number of POs being addressed. This can be achieved by using the decimal value of these bits and adding 1 to determine the number of POs being addressed. For example, if these two bits are "01", the first two POs will be addressed. Then, the next M bits can indicate the PO group of all addressed POs, similar to the above structure 6.

[0070] The number of POs associated with one PEI / WUS may be determined by the configuration of a parameter. In some embodiments, the number of POs associated with one PEI / WUS may be set to the number of paging occasions (POs) in a paging frame (PF). For example, if the number of POs in a PF is two, the number of POs associated with one PEI / WUS may be set to two.

[0071] In some embodiments, the number of POs associated with one PEI / WUS may be associated with the number of all paging frames in the paging cycle. For example, if there are 8 paging frames in the paging cycle, the number of POs associated with one PEI / WUS may be set to that value (i.e., 8).

[0072] In some embodiments, the number of POs associated with one PEI / WUS may be associated with the total number of PFs in the paging cycle and the number of POs in the PFs. For example, if there are 4 PFs in the paging cycle and 4 POs in the PFs, the number of POs associated with one PEI / WUS may be their product (i.e., 4*4=16).

[0073] By this method, each PO and each UE group can be effectively indicated. Therefore, the power consumption of the UE can be saved (because the UE that is not indicated can enter the sleep state without receiving the PO).

[0074] Example 2

[0075] In addition to indicating PO / group, PEI / WUS may also indicate the availability of CSI-RS resources or Tracking Reference Signals (TRS). In some embodiments, to reduce resource overhead and assist UEs in saving power consumption, CSI-RS resources may be shared from UEs in RRC_Connected mode.

[0076] Fig. 9 An example of a bit field structure 900 is shown. If PEI / WUS is based on PDCCH, the structure 900 may be used to indicate CSI-RS resource availability. In the structure 900, one or more Q bits 910 are placed after one or more blocks 902 for paging indication. Alternatively, the Q bit 910 for CSI-RS indication may be placed before one or more blocks for paging indication.

[0077] With this structure, each bit in the (multiple) Q-bit CSI-RS indication can individually indicate which CSI-RS set is available or unavailable. A bit "1" in the (multiple) Q-bit CSI-RS indication can indicate that the corresponding CSI-RS set is available. For example, if Q=4 and these Q bits are "1011", the first, third, and fourth CSI-RS sets are available, and the second CSI-RS set is unavailable.

[0078] If more than Q CSI-RS sets should be indicated, a predefined operation may be applied. For example, if more than Q CSI-RS sets should be indicated, a modulo operation may be applied. For example, the kth CSI-RS resource set may be indicated by the qth bit in the Q bits, where q=1+mod(k-1,Q). For example, if Q=4, and 6 CSI-RS (CSI-RS resource) sets are to be indicated, the first bit may indicate the availability of the first and fifth CSI-RS sets. The second bit may indicate the availability of the second and sixth CSI-RS sets. In this way, the bit width may be reduced.

[0079] In some embodiments, the code point of the Q bit 910 may indicate which CSI-RS resource set is available. For example, if Q=2, the following table may apply.

[0080]

[0081] Please note that other tables may be applicable for different numbers / combinations of CSI-RS resources than shown in this table.

[0082] In some embodiments, the availability of CSI-RS resources can be indicated by a specific pattern of blocks used for paging indication. For example, if all blocks used for paging indication are bit "0", all CSI-RS resources are unavailable. If all (multiple) blocks used for paging indication are bit "1", all CSI-RS resources are available. With this method, no additional overhead is required to indicate the availability of CSI-RS resources. Therefore, the coverage of PEI / WUS can be improved.

[0083] In some embodiments, if no CSI-RS resources are configured or broadcast, then there are no Q bits 910 in the PEI / WUS. In some embodiments, if no CSI-RS resources are configured, then these Q bits 910 are present but reserved. In some embodiments, if no CSI-RS resources are configured, then the Q bits 910 are set to some default value (e.g., all "0").

[0084] If PEI / WUS is based on a reference signal, such as CSI-RS, secondary synchronization signal (SSS), or demodulation reference signal (DM-RS), the availability of CSI-RS resources can be indicated via sequence generation. In some embodiments, different initial seeds can indicate which CSI-RS resource sets are available. For example, the first initial seed (e.g., x 0 ) may indicate that the first and second CSI-RS resource sets are available, while other resource sets are not available. The second initial seed (e.g., x with 7 bits or 31 bits) 1 ) can also indicate the availability of CSI-RS resources.

[0085] In some embodiments, both the PEI / WUS and the paging PDCCH may transmit bits for indicating CSI-RS availability. In some embodiments, if the availability of the indicated CSI-RS opportunity conflicts with the timing of the PEI / WUS, the indicated CSI-RS opportunity may be invalid (e.g., unavailable or non-existent). Alternatively, if the availability of the indicated CSI-RS opportunity conflicts with the timing of the PEI / WUS, the indicated CSI-RS resource may be invalid. If the indicated CSI-RS opportunity overlaps with a PDSCH that transmits system information, the indicated CSI-RS opportunity may be invalid. If the indicated CSI-RS opportunity overlaps with an SSB or SSB burst, the indicated CSI-RS opportunity may be invalid.

[0086] In some embodiments, a maximum of T = 4 CSI-RS resources or opportunities may be indicated by the PEI / WUS (i.e., Q ≤ 4). In some embodiments, the PEI / WUS may indicate a maximum of T = 8 CSI-RS resources (i.e., Q ≤ 8). These CSI-RS resources may be periodic. If the number of indicated CSI-RS resources is greater than T, the PEI / WUS may indicate only T CSI-RS resources.

[0087] In some embodiments, the PEI / WUS may indicate a maximum of V periodic CSI-RS resources, where V is the number of SSB indices. For example, for frequency range 1 (FR1), V=8, and for frequency range 2 (FR2), V=64. If the number of indicated CSI-RS resources is greater than V, they may be indicated sequentially (e.g., first the indication of the first V CSI-RS resources, followed by the indication of the other V CSI-RS resources).

[0088] In some embodiments, if the number of CSI-RS resources to be indicated (e.g., by PEI / WUS or paging PDCCH) is less than or equal to a certain value (e.g., V=8), all CSI-RS resources may be indicated via a bitmap of, for example, V=8 bits. If the number of CSI-RS resources to be indicated is greater than or equal to the value, all CSI-RS resources may be indicated, for example, via code points, which may have the same V=8-bit entries, i.e., 2^V=256 entries. Of these 256 entries, W=64 may be configured as valid entries, while the other entries are reserved.

[0089] By this method, after receiving the PEI / WUS of PO and / or paging PDCCH, the UE in RRC_Idle or RRC_Inactive state can know whether the CSI-RS opportunity or resource is available or unavailable. With this knowledge, the UE in RRC_Idle or RRC_Inactive state can receive the shared CSI-RS without waiting to receive the SSB later. Therefore, the UE in RRC_Idle or RRC_Inactive state has more time to sleep, which reduces power consumption.

[0090] Example 3

[0091] In the frequency domain, the control resource set (CORESET) of 5G-NR is configured with W=6 physical resource blocks (PRBs), and the resource element group (REG) is the PRB within a symbol. For example, if the time domain duration of the CORESET is one symbol, there are AL*6 PRBs in the control channel element (CCE), where AL is the aggregation level (e.g., 1, 2, 4, 8, 16).

[0092] The mapping of CCE to REG can be interleaved or non-interleaved. But for CORESET zero (CORESET 0), it is interleaved.

[0093] If PEI / WUS is based on SSS, the length of the PEI / WUS sequence can be 127 resource elements (REs). There are 12 subcarriers (SCs) in a PRB, or 12 REs in one symbol. Therefore, PEI / WUS will occupy ceil(127 / 12)=11 PRBs and 2 CCEs. If the length of the SSS-based PEI / WUS is 127x2=254REs (or 255REs), it will occupy 4 CCEs.

[0094] In some embodiments, if the length of the PEI / WUS is not an exact multiple of the number of REs in the occupied CCE, the PEI / WUS or RE may be padded, for example, with zeros. For example, if the length of the PEI / WUS sequence is L=127 REs and it occupies N=2 CCEs, the lowest RE index of floor((N*W*SC-L) / 2)=8 REs may be filled with zeros, i.e., padded. Alternatively, if the length of the PEI / WUS sequence is L=127 REs and it occupies N=2 CCEs, the highest RE index of ceil((N*W*SC-L) / 2)=9 REs may be filled with zeros. Alternatively, if the length of the PEI / WUS sequence is L=127 REs and it occupies N=2 CCEs, the highest RE index of ceil((N*W*SC-L) / 2)=9 REs in the CCE with the highest CCE index may be filled with zeros. Alternatively, if the length of the SSS-based PEI / WUS is not a multiple of the number of REs of one or more CCEs, zero padding may be applied to both ends of the SSS-based PEI / WUS. For example, zero padding may be applied to both ends of the SSS-based PEI / WUS until the length of the PEI / WUS matches the number of REs of one or more CCEs. Alternatively, if the length of the SSS-based PEI / WUS is not a multiple of the number of REs of one or more CCEs, zero padding may be applied to both ends of the REs of the CCEs allocated to the SSS-based PEI / WUS.

[0095] SSS-based PEI / WUS can occupy CORESET resources in an interleaved manner. For example, SSS-based PEI / WUS can occupy CORESET zero resources in the following manner:

[0096] Step 1: Generate sequence d for SSS-based PEI / WUS FEI (n) are as follows:

[0097] dPEI (n) = [1-2x 0 (n+m 0 )mod127)][-2x 1 (n+m 1 )mod127)]·Cover(n)

[0098]

[0099] 0≤n<127

[0100] in and Can be based on cell ID or configured by higher layers.

[0101] x 0 (i+7)=(x 0 (i+4)+x 0 (i))mod2

[0102] x 1 (i+7)=(x 1 (i+1)+x 1 (i))mod2

[0103] The initial seed can be:

[0104] [x 0 (6) x 0 (5) x 0 (4) x 0 (3) x 0 (2) x 0 (1) x 0 (0)] = [0 0 0 0 0 0 1]

[0105] [x 1 (6) x 1 (5) x 1 (4) x 1 (3) x 1 (2) x 1 (1) x 1 (0)] = [0 0 0 0 0 0 1]

[0106] Cover(n) is a covering sequence, for example the (l+mod(Cell_ID,H))th Walsh code, with length K=128 and binary +1 and -1 as its elements, And H = 127. By using the covering sequence, false detection of the SSS of another cell can be avoided.

[0107] In addition, the length of the SSS-based PEI / WUS can be changed to other values, such as 144 or 132. If the length is 0≤n<144 or 0≤n<132, the length can be changed to match the number of REs in 2 CCEs. This allows all REs within 2 CCEs to be fully utilized. The length can also be adjusted for different numbers of CCEs, such as 4.

[0108] Step 2: Generate an interleaved PRB pattern according to the following sub-steps.

[0109] Step 2-1: Generate a REG bundling index for every W=6 REGs. REGs can be numbered by time first, and then by RB index starting from the lowest RB index. REG bundling index can range from 0 to N RB *N S ym / W-1, where N RB is the number of RBs allocated to CORESET, and N S ym is the number of symbols in the time domain allocated to CORESET.

[0110] Step 2-2: Write the REG bundling index into the R*C rectangular interleaver, where R = 2 rows, C = (N RB *N S ym / W) / R columns, write column by column starting from the first row.

[0111] Step 2-3: Starting from the first column, read the CCE index from the R*C rectangular interleaver row by row.

[0112] For example, for CORESET, there may be 24 RBs and one symbol duration, CCE#0 may have RBs {0, 1, 2, 3, 4, 5}, CCE#1 may have RBs {12, 13, 14, 15, 16, 17}, CCE#2 may have RBs {6, 7, 8, 9, 10, 11}, and CCE#3 may have RBs {18, 19, 20, 21, 22, 23}, as shown in the following table. When SSS-based PEI / WUS is transmitted, it may be mapped to CCE#0 and CCE#1. That is, RBs {0, 1, 2, 3, 4, 5, 12, 13, 14, 15, 16, 17} may be used for the SSS-based PEI / WUS. Alternatively, the SSS-based PEI / WUS may be mapped to CCE 2 and CCE 3, corresponding to RB {6, 7, 8, 9, 10, 11, 18, 19, 20, 21, 22, 23}. In some embodiments, the SSS-based PEI / WUS may be repeatedly transmitted from CCE 0 and CCE 1 to CCE 2 and CCE 3.

[0113] In addition, the above step 1 may be performed after step 2.

[0114] CCE Index RB Index REG Index REG Bundle Index CCE 3 RB 18-23 REG 18-23 3 CCE 1 RB 12-17 REG 12-17 2 CCE 2 RB 6-11 REG 6-11 1 CCE 0 RB 0-5 REG 0-5 0

[0115] For a CORESET with 24 RBs and two symbol durations, the mapping of CCEs to RBs is shown in the following table. If an SSS-based PEI / WUS is sent, it can be mapped to CCE 0 and CCE 1, so RBs {0, 1, 2, 6, 7, 8} can be used for the SSS-based PEI / WUS. If an SSS-based PEI / WUS will occupy 4 CCEs, CCE 0-3 or CCE 4-7 can be used.

[0116]

[0117]

[0118] For a CORESET with 24 RBs and three symbol durations, the mapping of CCEs to RBs is shown in the following table. If an SSS-based PEI / WUS is sent, it can be mapped to CCE 0 and CCE 1, that is, CCE 0 and 1 can be allocated. The UE can perform blind detection on these target CCEs. With this mapping, RBs {0, 1, 4, 5} can be used for the SSS-based PEI / WUS.

[0119]

[0120]

[0121] Step 3: Map the sequence to RE according to the interleaving pattern. In some embodiments, the sequence can be mapped according to the REG index. For the allocated CCE or target CCE, the sequence can be first mapped in the frequency domain and then mapped in the time domain. This mapping can be applicable to the target CCE for UE blind detection, the CCE to be decoded, or the CCE for UE detection.

[0122] In some embodiments, the first mapping in the frequency domain may be applied to a candidate number of CCEs to be decoded, such as 4 CCEs. For example, for four CCEs with two symbols and a PEI / WUS based on SSS of length 127RE, the first PEI / WUS may be mapped to the first symbol, and the second PEI / WUS may be mapped to the second symbol. In some embodiments, the sequence may be first mapped in the frequency domain and then mapped in the time domain. In some embodiments, the sequence may be mapped first according to the RB index assigned to the sequence and then according to the REG index. In some embodiments, the sequence may be first mapped according to the RB index of the RB assigned to the sequence and then mapped according to the time seconds. For example, for a CORESET with 24 RBs and two symbol durations, if CCE 0 and 1 are allocated to one PEI / WUS, the sequence of the PEI / WUS may be mapped as {RB 0 in the first symbol, RB 1 in the first symbol, RB 2 in the first symbol, RB 6 in the first symbol, RB 7 in the first symbol, RB 8 in the first symbol, RB 0 in the second symbol, RB 1 in the second symbol, RB 2 in the second symbol, RB 6 in the second symbol, RB 7 in the second symbol, RB 8 in the second symbol}. Based on the REG index, the mapping corresponds to {REG 0, REG 2, REG 4, REG 12, REG 14, REG 16, REG 1, REG 3, REG 5, REG 13, REG 15, REG 17}.

[0123] If a CORESET (e.g., CORESET Zero) is configured with more than one symbol (e.g., two symbols), one SSS-based PEI / WUS may occupy REs on one symbol. Similarly, if a CORESET (e.g., CORESETZero) is configured with more than one symbol (e.g., two symbols), one SSS-based PEI / WUS may occupy REGs on one symbol. For example, if a CORESET Zero has two symbols, one SSS-based PEI / WUS of length 127 may occupy {REG 0, REG 2, REG 4, REG 12, REG 14, REG 16, REG 24, REG 26, REG 28, REG 36, REG38, REG 40}, which are REGs on the first symbol of the CORESET. By processing only one symbol, the UE can reduce power consumption.

[0124] In some embodiments, if the CORESET (e.g., CORESET Zero) is configured to have more than three symbols, and the SSS-based PEI / WUS may occupy REGs or REs on one symbol. In some embodiments, if the CORESET (e.g., CORESET Zero) is configured to have more than one symbol (e.g., two or more symbols), one SSS-based PEI / WUS may occupy REGs or REs on one symbol and repeat itself on other symbols. For example, if the CORESET Zero has two symbols, a SSS-based PEI / WUS of length 127 may occupy REGs {0, 2, 4, 12, 14, 16, 24, 26, 28, 36, 38, 40} and repeat on REGs {1, 3, 5, 13, 15, 17, 25, 27, 29, 37, 39, 41}. Therefore, the UE may receive the two symbols separately and combine them together to improve performance. In addition, REGs {1, 3, 5, 13, 15, 17, 25, 27, 29, 37, 39, 41} can be allocated to another SSS-based PEI / WUS or other types of PEI / WUS, CSI-RS-based PEI / WUS.

[0125] Similarly, the above mapping rules may also be applicable to CSI-RS-based PEI / WUS. The mapping rules may be applicable to CSI-RS-based PEI / WUS, whose length is a multiple of 144RE. Alternatively, the mapping rules may also be applicable to CSI-RS-based PEI / WUS, whose length is a multiple of 72RE. In some embodiments, the sequence r(m) of CSI-RS-based PEI / WUS is:

[0126]

[0127] The pseudo-random sequence c(i) is defined as follows: The pseudo-random sequence generator can be initialized as follows:

[0128]

[0129] At the beginning of each OFDM symbol, is the number of slots in a radio frame, l is the number of OFDM symbols in a slot, and n ID Configured by higher layers. Hadamard(m) is the (l+mod(Cell_ID*PO_Index,H)th Hadamard code of a Hadamard sequence (eg, of length J=256 (or J=128 or J=512) with binary +1 and -1 as its elements, H=72, 144, or 288). is the cell ID. PO_Index=1, ..., Number_of_PO_Configured. Wherein, Number_of_PO_Configured is the number of POs configured by a higher layer from {1, 2, 4}.

[0130] In some embodiments, as described above, the above Hadamard sequence can be replaced by a Walsh sequence. For example, as shown above, the Hadamard sequence can be replaced by a Walsh sequence of binary +1 and -1.

[0131] The pseudo-random sequence can be defined by a Gold sequence of length 31. PN The output sequence c(n) (where n=0, 1, ..., M PN -1) is:

[0132] c(n)=(x 1 (n+N C )+x 2 (n+N C ))mod2

[0133] x 1 (n+31)=(x 1 (n+3)+x 1 (n))mod2

[0134] x 2 (n+31)=(x 2 (n+3)+x 2 (n+2)+x 2 (n+l)+x 2 (n))mod2

[0135] Where NC = 1600, and the first m sequence x 1 (n) can use x 1 (0) = 1, x 1 (n) = 0, n = 1, 2, ..., 30 for initialization. The second m sequence x 2 (n) is initialized by indicates that its value depends on the application of the sequence.

[0136] The CSI-RS based PEI / WUS may be mapped to the DM-RS associated with the PDCCH, such as the DM-RS position. The CSI-RS based PEI / WUS may be mapped to the DM-RS associated with the PDCCH on CORESET zero. The CSI-RS based PEI / WUS may be mapped to one or more DM-RS symbols for the PDCCH. Similarly, the SSS based PEI / WUS may also be mapped to the DM-RS associated with the PDCCH.

[0137] When the UE is detecting PEI / WUS, such as PDCCH-based PEI / WUS, it may search for PEI / WUS on CCEs in the search space. In some embodiments, when the search space of a random access response (RAR), message 2 (Msg2), message B (MsgB), or beam recovery conflicts with the search space of PEI / WUS, the PEI / WUS is discarded. In some embodiments, the UE is not configured to expect a conflict between the search space of PEI / WUS and the search space of RAR, Msg2, MsgB, or beam recovery, such as a CCE conflict or a conflict on the same CCE.

[0138] PEI / WUS, such as PDCCH-based PEI / WUS, may have one or more monitoring opportunities. PEI / WUS may have a time window (e.g., 10 time slots) for transmission. The UE may be configured to monitor the PEI / WUS within the time window. In some embodiments, the UE is not configured to expect the PEI / WUS outside the time window. Under this restriction, the power consumption of the UE may be saved.

[0139] In some embodiments, if a sequence-based PEI / WUS (e.g., SSS-based PEI / WUS or CSI-RS-based PEI / WUS) is mapped to a CORESET (e.g., CORESET zero) or search space, no DM-RS on a CCE (or REG, RE, RB, or symbol) may be allocated to the sequence-based PEI / WUS. For example, a DM-RS (or REG, RE, RB, or symbol) on a CCE allocated to a sequence-based PEI / WUS may be covered by a sequence-based PEI / WUS.

[0140] In some embodiments, the indicated CSI-RS opportunity may be invalid if it overlaps with a CORESET. For example, if the CSI-RS opportunity(s) indicated by the PEI / WUS overlaps with a CORESET scheduled paging message, the indicated CSI-RS opportunity will be invalid. In another example, the indicated CSI-RS opportunity that overlaps with CORESET zero will be invalid. In another example, the indicated CSI-RS opportunity that overlaps with CORESET zero of a scheduled paging message will be invalid. In yet another example, the indicated CSI-RS opportunity that overlaps with a CORESET (including CORESET zero, which sends the PEI / WUS) will be invalid.

[0141] In this way, an SSS-based PEI / WUS can coexist with PDCCH on CORESET 0 without interfering with each other. If the resources of CORESET 0 are not occupied by PDCCH, available resources can be provided for SSS-based PEI / WUS.

[0142] Example 4

[0143] For a UE in RRC_Connected state, the BS can configure CSI-RS or TRS resources for it via dedicated signaling. The size of the dedicated signaling can be very large. Because the signaling includes many parameters, such as the parameters in the table below, the signaling overhead is high. It should be noted that this table is only for one CSI-RS resource set, and the UE may have multiple CSI-RS resource sets.

[0144] parameter Applicable values powerControlOffsetSS / dB {-3，0，3，6} scrambling 0 to 1023 firstOFDMSymbolInTimeDomain 0 to 9 startingRB 0 to 274 nrf 24 to 276 … …

[0145] When CSI-RS or TRS is shared for UEs in RRC_Idle or RRC_Inactive state, for example for SYNC / AGC, the configuration information of the shared CSI-RS or TRS can be broadcast in the system information block (SIB). However, if all these parameters are broadcast in the SIB, the signaling overhead will be high. Therefore, if the parameters are not configured, the default values ​​can be used, as shown in the following table.

[0146]

[0147]

[0148] In addition, the SIB has a maximum length (e.g., X=1728 bits). Therefore, if the SIB for broadcasting configuration information for shared CSI-RS resources must be greater than X bits, a default value may be used. For example, all CSI-RS parameters may be set to default values. In some embodiments, if the SIB exceeds the maximum length, the CSI-RS resources will not be shared with UEs in the RRC_Idle or RRC_Inactive states. In some embodiments, the UE is not configured to expect the SIB to transmit configuration information for shared CSI-RS resources greater than X bits in length.

[0149] Alternatively, if the size of the SIB used to broadcast the configuration information of the shared CSI-RS resources is larger than X bits, it will be split into several parts of equal size.

[0150] In some embodiments, two or more fields including configuration information of the shared CSI-RS resources may be combined to reduce signaling overhead. In addition, two or more fields indicating configuration information of the shared CSI-RS resources may be combined to reduce signaling overhead. For example, the "startingRB" field may have ceil(log2(274))=9 bits, and the field "nrofRB" may also have ceil(log2(274))=9 bits. Therefore, these two fields include 18 bits. If they are combined together, for example using a resource indication value (RIV), they may include a combination of ceil(log2(274*(274+1) / 2))=16 bits, thereby saving bits and reducing the signaling overhead of shared CSI-RS resources.

[0151] Example 5

[0152] For a UE in RRC_Idle / RRC_Inactive state, the only reference signal is the SSB. Therefore, there is no CSI-RS for this UE. For a UE in RRC_Connected state, one or more CSI-RS resources or resource sets may be configured. These CSI-RS resources may be shared for UEs in RRC_Idle / RRC_Inactive state, for example, via broadcast on SIB.

[0153] For each CSI-RS resource, quasi co-location (QCL) information (eg, beam direction) may be included in the following data fields. The QCL information may include the QCL type and an index to the SSB.

[0154]

[0155] For high frequency bands (e.g., FR2), many CSI-RS resources (e.g., 64 or more resources) may be configured. If the QCL information of each CSI-RS resource is broadcast, there will be a lot of signaling overhead. Therefore, a method to reduce the signaling overhead is needed.

[0156] In some embodiments, if the number of configured CSI-RS resources is less than or equal to a certain value (e.g., four resources or four resource sets), the QCL information of each CSI-RS resource may be indicated or broadcasted separately. The QCL type may be fixed in the protocol (e.g., QCL type C or QCL type D), or the QCL type may be omitted to reduce signaling overhead. The QCL index of the SSB may be indicated in the PEI / WUS and / or paging PDCCH.

[0157] If the number of configured CSI-RS resources is greater than a certain value (e.g., eight resources or eight resource sets), these CSI-RS resources are divided into several groups, and group-related information (e.g., which CSI-RS resource or CSI-RS resource set belongs to a group) is broadcast. Alternatively, each QCL information of each group is indicated.

[0158] Alternatively, if the number of shared RS resources (sets) is small (eg, only two RS resources), the shared RS resources (sets) may be directly indicated. For example, the first shared RS resource is associated with SSB index 0, and the second shared RS resource is associated with SSB index 1.

[0159] If there are many shared CSI-RS or TRS resources, in order to reduce signaling overhead, the resource ID can be divided into several groups according to a certain feature (such as SSB index). For example, if there are X = 6 SSB indexes, and each index has Y = 4 shared RS resources, there are 24 shared RSs in total. By grouping RS resources by SSB index, 6 indexes can be used to indicate the QCL information of these 24 RS resources.

[0160] If the parameters configured for many CSI-RS resources are almost the same, the signaling overhead is still high. In order to reduce the signaling overhead, the same parameters may be expressed only once. In other words, common parameters can be configured once for all CSI-RS resources, so other CSI-RS resources do not configure parameters separately. In addition, if not configured, the default value can also be used for the common parameters. With this method, the signaling overhead for broadcasting the QCL information of the CSI-RS resources can be reduced.

[0161] Example 6

[0162] To improve the performance of PEI / WUS, PEI / WUS can transmit some bits (e.g., K=3 bits). However, the states to be addressed may be too large for the number of bits (e.g., 255 combinations). Therefore, a method is needed to use a smaller number of bits to represent the additional combinations. The following table is an example. Note that the following table uses 3 bits, but similar tables can be configured for different numbers of bits and / or groups.

[0163]

[0164] First, a higher layer may configure one or more tables to indicate which operation is to be applied. Higher layer configuration information may include whether the paging indication channel directly indicates (e.g., applying the bit structure in the above example). Higher layer configuration information may also include a configuration table, a configuration entity or a configuration instance, a configuration set, or a mapping relationship with multiple entries, such as the above table. For example, higher layer configuration information may include a configuration entity with multiple values ​​and its corresponding operations (e.g., value 0 for operation 1, value 1 for operation 2, value 2 for operation 3). For example, the above table is used. Other parameters may be applied in conjunction with the table.

[0165] The table may be used to indicate the paging probabilities for the groups. For example, the first group may have the highest paging probability, followed by the second group, the third group, etc. In this way, the groups with relatively high paging probabilities may be addressed directly. For example, the groups with relatively high paging probabilities may be addressed in separate entries from the entries associated with other groups.

[0166] Second, the PEI / WUS can indicate which entry is addressed. For example, if entry 4 in the table above is addressed, then the fourth group is paged.

[0167] The base station may indicate the following table. If multiple tables are configured, the SIB may indicate which table is used. If no table is indicated, a default table may be used. Alternatively, if no table is configured, a default operation (eg, "address all groups") may be used.

[0168] Different tables may be used depending on different conditions or UEs, such as different UE categories / equipment types. For example, for RedCap UEs, the first table may be used, while the following table may be applied to non-RedCap UEs.

[0169] entry Bit operate 0. 000 No group is addressed. 1. 001 The first group is addressed. 2. 010 The second group is addressed. 3. 011 The third group is addressed. 4. 100 A first and a second group are addressed. 5. 101 The third and fourth groups are addressed. 6. 110 The fifth, sixth, seventh, and eighth groups are addressed. 7. 111 Addressing all groups

[0170] Similarly, the CSI-RS availability indication can also use the above method. In addition, the paging group and CSI-RS resource availability can be jointly indicated as shown in the following table:

[0171]

[0172]

[0173] The configuration table can be adaptively expanded to the following table, where "N / A" means "not available". Through this configuration table, different numbers of entries can be supported. For example, at one time, when 8 paging groups are configured, a column with "8 entries" can be used. At another time, when 4 paging groups are configured, a column with "4 entries" can be used. In other words, a small table can be embedded in a large table. Alternatively, a configuration entity that supports a variable number of entries can be used.

[0174]

[0175]

[0176] In this way, the most important combinations can be indicated using very few bits.It should be noted that in many cases it may not be necessary to indicate all combinations of a group.

[0177] Example 7

[0178] In the paging PDCCH, there are several "reserved bits" (6 bits or more). These "reserved bits" can be used to indicate the paging group (e.g., UE group) and / or CSI-RS resource availability. Note that when discussing the indication of the group / paging group, the same principle can be applied to indicate the CSI-RS resource availability.

[0179] First, a higher layer (e.g., via SIB) can configure how many bits in the "reserved bits" are used for paging group indication and / or CSI-RS resource availability indication. For example, three bits can be used for paging group indication. Two bits, four bits, five bits, etc. can also be used.

[0180] Secondly, determine the meaning of "reserved bits". If the number of required bits is less than or equal to the number of "reserved bits", the first few bits (or the last few bits) can be used for indication, and the other bits are still reserved. The indication includes a paging indication and / or a CSI-RS or TRS resource availability indication. For example, if there are four paging groups, two bits can be used for paging indication. If the first two bits of the "reserved bits" are used for paging group indication, the remaining reserved bits can be reserved as "reserved bits". Alternatively, the remaining reserved bits can be set to a known value (for example, all 0s).

[0181] In some embodiments, it may be desirable to use reserved bits to address different combinations of groups.

[0182] entry Bit operate 0. 00 No group is addressed. 1. 01 The first group is addressed. 2. 10 A first and a second group are addressed. 3. 11 Addresses all groups.

[0183] If the number of bits required is greater than the number of "reserved bits", each "reserved bit" can represent a group, and all "reserved bits" are "1", indicating that all groups are addressed. For example, when there are two reserved bits for paging indication, but there are more than two groups, the above table can be used.

[0184] Higher layers or SIB may indicate how many paging groups are configured. Higher layers or SIB may also indicate how many "reserved bits" will be used.

[0185] In addition, multiple tables can be configured. The SIB can indicate which table to use. If the SIB indication does not exist, the first table can be used by default.

[0186] If all "reserved bits" are used, a mapping table can still be used. For example, if three bits are used for paging group indication and another three bits are used for CSI-RS resource availability indication, a table with 8 entries for paging group indication and another table with 8 entries for CSI-RS resource availability indication can be used.

[0187] These methods use a smaller number of bits to indicate the paging group, which otherwise might require more bits by indicating the selection of the most important combinations. It should be noted that it is generally not necessary to indicate all combinations. In this way, the "reserved bits" can be effectively used for paging and CSI-RS indication, even though it is a smaller number of bits.

[0188] Example 8

[0189] Some users may support PEI / WUS, while some users may not. However, most UEs are configured to support paging PDCCH. Therefore, the distributed configuration information including paging group indication and CSI-RS resource availability indication between PEI / WUS and PDCCH can allow more UE indication than using them separately.

[0190] In the first example, the same content can be sent on both PEI / WUS and paging PDCCH (for example, on the "reserved bit" described in Example 7). A UE supporting PEI / WUS can use PEI / WUS to obtain a paging group indication and a CSI-RS resource availability indication. Therefore, more power consumption can be saved by receiving one signal. If the UE fails to receive PEI / WUS, it can use paging PDCCH to receive a paging group indication and a CSI-RS resource availability indication. In addition, if the UE can receive both PEI / WUS and paging PDCCH, the reliability of the indication information can be improved.

[0191] In a second example, a subset of the paging group indication and CSI-RS resource availability indication information may be transmitted on the PEI / WUS and the paging PDCCH. For example, the paging group indication may be transmitted on the PEI / WUS, and the CSI-RS resource availability indication may be transmitted on the paging PDCCH. In another example, if the paging group indication requires 3 bits and the CSI-RS resource availability indication also requires 3 bits, the PEI / WUS may transmit a 3-bit paging group indication and a 1-bit CSI-RS resource availability indication, while the paging PDCCH may transmit a 2-bit CSI-RS resource availability indication. Therefore, the subset of the paging group indication and CSI-RS resource availability indication information of the PEI / WUS is 3+1 bits, while the subset of the paging group indication and CSI-RS resource availability indication information of the paging PDCCH is 2 bits, including the CSI-RS resource availability information in this case. Other bit distributions may be configured according to the number of bits used for paging or CSI-RS indication per channel.

[0192] In another example, if PEI / WUS is configured, a subset of the CSI-RS resource availability indication information (e.g., one bit) may be transmitted on the PEI / WUS, while the rest of the CSI-RS resource availability indication information may be transmitted on the paging PDCCH. The one-bit CSI-RS resource availability indication information transmitted on the PEI / WUS may indicate whether there is any change in the CSI-RS resource availability indication information on the paging PDCCH, rather than directly indicating the CSI-RS resource. Alternatively, in addition to the single bit, other subsets of the CSI-RS resource availability indication information transmitted on the PEI / WUS may indicate whether there is any change in the CSI-RS resource availability indication information on the paging PDCCH.

[0193] In some embodiments, a subset of the CSI-RS resource availability indication information transmitted on the PEI / WUS may indicate whether CSI-RS resource availability indication information is present on the paging PDCCH. Similarly, a subset of the CSI-RS resource availability indication information transmitted on the paging PDCCH may indicate whether CSI-RS resource availability indication information is present on the PEI / WUS.

[0194] The subset of paging group indications transmitted on the PEI / WUS may indicate whether the paging group indication is present on the paging PDCCH. Similarly, the subset of paging group indications transmitted on the paging PDCCH may indicate whether the paging group indication is present on the PEI / WUS.

[0195] A higher layer (e.g., via SIB) may indicate a subset of the paging group indication and CSI-RS resource availability indication information about PEI / WUS and paging PDCCH. For example, SIB may indicate 4 paging groups (e.g., 4 bits, one bit per group) on PEI / WUS and 2 CSI-RS resource availabilities (e.g., 2 bits, one bit per CSI-RS resource) on PEI / WUS, while another 6 CSI-RS resource availabilities may be transmitted on paging PDCCH.

[0196] In some embodiments, the following mapping table is used for paging group indication and CSI-RS resource availability indication.

[0197]

[0198] A subset of paging groups and / or CSI-RS resource availabilities may be sent on the PEI / WUS. Alternatively, a subset of paging groups and / or CSI-RS resource availabilities may be sent on the paging PDCCH of the PO. For example, the paging group and the first CSI-RS resource availability may be indicated on the PEI / WUS, while other CSI-RS resource availabilities may be indicated on the paging PDCCH.

[0199] Both the paging PDCCH indication and the PEI / WUS (e.g., PEI based on PDCCH) indication may be enabled (e.g., via SIB or higher layer signaling), e.g., replicated. Alternatively, if the PEI / WUS (e.g., PEI based on PDCCH) indication is configured, the paging PDCCH indication may be disabled. Alternatively, the paging PDCCH indication may be disabled or enabled via a PEI / WUS (e.g., PEI based on PDCCH) indication. Alternatively, one or both of the paging PDCCH indication and the PEI / WUS indication may be configured by a higher layer. Alternatively, which one or both of the paging PDCCH indication and the PEI / WUS indication may be broadcast in the SIB.

[0200] These methods allow for greater flexibility in indicating paging groups and / or CSI-RS resource availability.

[0201] Example 9

[0202] In a CORESET that transmits PDCCH or PDCCH-based PEI / WUS, DM-RS will be sent together with PDCCH or PDCCH-based PEI / WUS. Therefore, on the UE side, if the UE does not detect DM-RS on the target candidate CCE, the UE can assume that PDCCH or PDCCH-based PEI / WUS is not sent. In some embodiments, if the UE does not detect DM-RS on the target candidate CCE, the UE can assume that there is no PDCCH-based PEI / WUS.

[0203] If the UE does not detect DM-RS on the target candidate CCE, the UE may perform other operations. For example, if the UE does not detect DM-RS on the target candidate CCE, the UE may assume that the CSI-RS availability state has not changed. In another example, if the UE does not detect DM-RS on the target candidate CCE, and the states of all CSI-RS availabilities are jointly encoded, the UE may assume that the states of CSI-RS availability have not changed. Alternatively, if the UE does not detect DM-RS on the target candidate CCE, and the code point represents the states of all CSI-RS availabilities, the UE may assume that the states of CSI-RS availability have not changed.

[0204] A detection threshold may be defined for DM-RS detection. For example, the detection threshold may be Th = -125 dBm. If the UE receives DM-RS power below the detection threshold, the UE may assume that there is no PDCCH-based PEI / WUS (or any other assumption / action described above). For example, if the UE receives DM-RS power of -130 dBm, the UE may assume that there is no PDCCH-based PEI / WUS.

[0205] Through this method, by detecting DM-RS without decoding PDCCH in CORESET, the UE can determine the presence of PDCCH-based PEI / WUS and / or CSI-RS availability.

[0206] Example 10

[0207] In this example, the DM-RS may convey one or more bits (eg, on its initialization seed, see above for detailed examples). The bits on the DM-RS may be jointly encoded with bits in the PDCCH (eg, downlink control information, (DCI)).

[0208] For example, if there are N=8 groups to be addressed, the following table can be used to indicate which group is to be addressed. In this example, the code point plus the first group is to be addressed. For example, this operation can be associated with PO.

[0209]

[0210] In some embodiments, the following table may be used to indicate which group is to be addressed.

[0211]

[0212]

[0213] The "reservation status" in the above table may indicate the availability of CSI-RS. For example, a code point value of 10 may indicate that no CSI-RS resources are available. In another example, a code point value of 11 may indicate that all CSI-RS resources (sets) are available.

[0214] One or more bits in the joint bits of DM-RS and DCI may indicate the availability of CSI-RS. For example, the most significant bit (MSB) may indicate the availability of CSI-RS resources (e.g., "0" indicates that no CSI-RS resources are available, and "1" indicates that all CSI-RS resources (sets) are available).

[0215] In another example, the DM-RS may indicate a wake-up indication, ie, which paging group is to be addressed, while a bit in the DCI may indicate CSI-RS resource availability.

[0216] In another example, the DM-RS may indicate CSI-RS resource availability, while a bit in the DCI indicates a wake-up / paging indication.

[0217] Example 11

[0218] The operation of multiple POs may be jointly represented as a combination of bits of the DCI and bits of the DM-RS, such as jointly coded bits. For example, the first 4 bits of the combined bits of the bits in the DCI and the bits in the DM-RS may indicate the operation of the first PO, and the second 4 bits of the combined bits of the bits in the DCI and the bits in the DM-RS may indicate the operation of the second PO.

[0219] In some embodiments, the DM-RS may indicate which PO is addressed. For example, one bit of the DM-RS corresponds to one PO. Alternatively, the code points of certain bits in the DM-RS may indicate which PO is addressed (woke up). The code points of certain bits in the DM-RS may indicate one or more groups of one or more POs being addressed.

[0220] Similarly, (multiple) bits in the DCI may be used in place of bits in the DM-RS. For example, for paging group indication information for each PO, there may be a block of bits in the DCI that address one or more groups or subgroups. As described in this document, the block of bits may use a bit map, code point, or joint coding to address the groups or subgroups.

[0221] For example, "reservation status(es)" similar to that in Example 10 may indicate CSI-RS availability.

[0222] In another example, one or more bits of the joint bits of DM-RS and DCI may indicate the availability of CSI-RS.

[0223] In another example, the DM-RS may indicate a wake-up indication, ie, which paging group is to be addressed, while a bit in the DCI may indicate CSI-RS resource availability.

[0224] In another example, the DM-RS may indicate the availability of CSI-RS resources, while the bits in the DCI indicate the wake-up / paging indication.

[0225] Example 12

[0226] The paging indication or CSI-RS resource availability indication may be transmitted in the bit scrambled code of the PDCCH-based PEI. After encoding and rate matching the PDCCH-based PEI, a bit sequence b(i) is achieved, where i=0, 1, 2, ..., M-1, where M is the number of bits after rate matching. The bit sequence b(i) will be scrambled by a scrambling sequence c(i), such as c(i) described in the above example. The bit scrambling operation may be in It is a modulo 2 addition or XOR operation, and d(i) is the scrambled bit.

[0227] The paging indication information and / or the CSI-RS resource availability indication may be used to generate the scrambling sequence c(i). For example, the scrambling sequence c(i) may be generated using the initialization seed c init =(n RNTI ·216+n ID +n Group ·28+n CSIRS )mod2 31 Initialize, where n RNTI is the Radio Network Temporary Identifier (e.g., it can be configured as a paging RNTI with a value of 0xFFFE or zero), n ID is a parameter configured by a higher layer (e.g., zero), n Group is a paging group indicator (e.g., having an 8-bit value, such as 100), n CSIRSis a CSI-RS resource availability indication (e.g., having a 12-bit value, such as 200. The value may be an entry or code point similar to the table discussed in Example 6, with a different number of bits.) In addition, n may not be present in the initial seed. RNTI and n ID .

[0228]

[0229] After decoding the PDCCH-based PEI / WUS, the UE can obtain n Group and / or CSIRS The value of . Therefore, the UE can know which group will be addressed and / or CSI-RS resource availability. This method allows the UE to determine which group will be paged and / or which CSI-RS resource will be available. Therefore, this can save power consumption of the UE by maximizing sleep.

[0230] Fig.10 An example method 1000 is shown. At 1002, paging configuration information is received. The paging configuration information may be associated with a paging message. For example, the paging configuration may include a paging indication channel and / or a paging occasion. The paging configuration information may indicate a paging probability for one or more groups. In some embodiments, the paging probability may be included in an entry of a configuration entity. The paging configuration information may also include CSI-RS resource availability information. At 1004, based on the received paging configuration information, paging messages are monitored.

[0231] The paging message is monitored based on the paging configuration information.

[0232] Fig.11 An example method 1100 is shown. At 1102, paging configuration information associated with a paging message is sent. The paging configuration may include a paging indication channel and / or a paging occasion. The paging configuration information may indicate a paging probability for one or more groups. In some embodiments, the paging probability may be included in an entry of a configuration entity. The paging configuration information may also include CSI-RS resource availability information. At 1104, a paging message is sent according to the paging configuration information.

[0233] Some embodiments may preferably incorporate the following solutions described herein.

[0234] For example, the solutions listed below may be implemented by a wireless device for paging as described herein:

[0235] 1. A method of wireless communication (e.g., Fig.10 Method 1000), comprising: receiving paging configuration information associated with a paging message (1002) at a wireless device; and monitoring the paging message based on the paging configuration information (1004).

[0236] 2. The method according to solution 1, wherein the paging configuration information indicates a paging indication channel and a paging occasion.

[0237] 3. The method according to solution 1 further includes: receiving the paging message according to the paging configuration information.

[0238] 4. The method according to solution 1, wherein the paging configuration information includes configuration entities associated with one or more groups (e.g., Figures 5 to 9 bit field structure 500, 600, 700, 800 or 900).

[0239] 5. The method of solution 4, wherein the entries of the configuration entity include paging probabilities for one or more groups.

[0240] 6. The method of solution 5, wherein the entry includes the paging probability of a single group, and wherein the paging probability of the single group is higher than the paging probability of a second group.

[0241] 7. The method of solution 4, wherein the configuration entity comprises a variable number of entries or a plurality of predefined configuration sub-entities.

[0242] 8. The method of solution 4, wherein the configuration entity is associated with a device type.

[0243] 9. The method according to any one of solutions 1 to 8, wherein the paging configuration information includes channel state information reference signal (CSI-RS) resource availability information.

[0244] 10. The method of solution 9, wherein a paging indication channel is configured and a subset of the CSI-RS resource availability information is transmitted on the paging indication channel.

[0245] 11. The method according to solution 10, wherein the subset of the CSI-RS resource availability information indicates a change in CSI resource availability on a paging PDCCH.

[0246] 12. The method according to solution 1, wherein the paging configuration information indicates N paging occasions and M groups, and includes a bit structure (e.g., Figure 6 The present invention provides a bit structure 600), wherein the bit structure includes: a first block of N bits, each of the N bits being associated with one of the N paging occasions; and a plurality of blocks of M bits, wherein each of the plurality of blocks of M bits is associated with one of the N bits of the first block and exists only when the associated bit of the first block has a specific value.

[0247] 13. The method according to solution 1, wherein the paging configuration information indicates N paging occasions and includes a bit structure (e.g., Figure 5 A bit structure 500) comprising: N blocks, each block having M bits, each of the N blocks being associated with one of the N paging occasions, wherein each of the M bits is associated with a group.

[0248] 14. The method according to solution 1, wherein the paging configuration information includes a bit structure (e.g., Fig. 9 A bit structure 900) includes: a plurality of blocks associated with a paging indication; and a Q bit, wherein the Q bit indicates the availability of a CSI-RS resource set.

[0249] 15. The method of solution 14, wherein each bit in the Q bits indicates whether a corresponding CSI-RS resource set is available.

[0250] 16. The method of solution 14, wherein the availability of the CSI-RS resources is indicated by a code point including the Q bit.

[0251] 17. The method according to solution 14, wherein the paging configuration information indicates more than Q CSI-RS resource sets, and the method further comprises: performing a predefined operation on the Q bits.

[0252] 18. The method according to solution 17, wherein: the predefined operation is a modulo operation, and the kth CSI-RS resource set is indicated by the qth bit in the Q bits, where q=1+mod(k-1,Q).

[0253] 19. The method according to solution 1, wherein the paging configuration information is based on a secondary synchronization signal (SSS) and occupies control resource set (CORESET) resources in an interleaved manner.

[0254] 20. The method of solution 19, wherein the paging configuration information is first mapped in the frequency domain and then mapped in the time domain.

[0255] 21. A method according to solution 19, wherein the CORESET resources include a certain number of control channel elements (CCEs), each CCE includes a certain number of resource elements (REs), and wherein the length of the SSS-based configuration information is not equal to a multiple of the number of resource elements in each CCE, the method further comprising: adding one or more zeros at each end of the configuration information.

[0256] 22. A method according to solution 19, wherein the CORESET resources include a certain number of control channel elements (CCEs), each CCE includes a certain number of resource elements (REs), and wherein the length of the SSS-based configuration information is not equal to a multiple of the number of resource elements in each CCE, the method also includes: setting one or more REs to zero.

[0257] 23. The method of solution 19, wherein CCE numbers are interleaved according to their resource block (RB) index, resource element group (REG) index, or REG bundling index.

[0258] 24. The method according to solution 1, wherein the paging configuration information includes CSI-RS configuration information.

[0259] 25. The method of solution 24, wherein the CSI-RS configuration information includes a default value.

[0260] 26. The method of solution 24, wherein the CSI-RS configuration information includes multiple fields that can be combined into one field.

[0261] 27. The method of solution 24, wherein the CSI-RS configuration information indicates quasi co-location (QCL) information based on a certain number of configured CSI-RS resources.

[0262] 28. The method according to solution 1 further comprises:

[0263] The presence of the paging configuration information is determined by detecting a demodulation reference signal (DM-RS).

[0264] 29. The method of solution 28, wherein the presence of the paging configuration information is determined when the detected DM-RS exceeds a threshold.

[0265] 30. The method of solution 28, wherein bits in downlink control information (DCI) and bits in DM-RS are jointly encoded, and wherein the jointly encoded bits indicate a paging group.

[0266] 31. The method of solution 31, wherein the jointly encoded bits indicate the paging group based on a code point.

[0267] 32. The method of solution 28, wherein bits in downlink control information (DCI) and bits in DM-RS are jointly encoded, and wherein the jointly encoded bits indicate CSI-RS availability.

[0268] 33. The method of solution 1, wherein the paging configuration information is received in a bit scrambled sequence.

[0269] 34. The method of solution 24, wherein the CSI-RS configuration information is received in a bit scrambled sequence.

[0270] 35. A method of wireless communication, comprising: sending, by a network device, paging configuration information associated with a paging message; and sending the paging message according to the paging configuration information.

[0271] 36. The method of solution 35, wherein the paging configuration information indicates a paging indication channel and a paging occasion.

[0272] 37. The method of solution 35, wherein the paging configuration information includes configuration entities associated with one or more groups.

[0273] 38. The method of solution 35, wherein the entries of the configuration entity include paging probabilities for one or more groups.

[0274] 39. The method of solution 38, wherein the entry includes the paging probability of a single group, and wherein the paging probability of the single group is higher than the paging probability of a second group.

[0275] 40. A method according to any one of solutions 35 to 39, wherein the paging configuration information includes channel state information reference signal (CSI-RS) resource availability information.

[0276] 41. The method of solution 35, wherein the paging configuration information indicates N paging occasions and M groups and comprises a bit structure, the bit structure comprising:

[0277] A first block of N bits, each of the N bits being associated with one of the N paging occasions, respectively; and a plurality of blocks of M bits, each of the plurality of blocks of M bits being associated with one of the N bits of the first block and being present only if the associated bit of the first block has a particular value.

[0278] 42. A method according to solution 35, wherein the paging configuration information indicates N paging occasions and includes a bit structure, the bit structure including: N blocks, each block has M bits, each of the N blocks is associated with one paging occasion among the N paging occasions, and each of the M bits is associated with a group.

[0279] 43. The method of solution 35, wherein the paging configuration information is based on a secondary synchronization signal (SSS) and occupies control resource set (CORESET) resources in an interleaved manner.

[0280] 44. The method of solution 35, wherein the paging configuration information includes CSI-RS configuration information.

[0281] 45. The method of solution 44, wherein the CSI-RS configuration information includes a default value.

[0282] 46. ​​The method of solution 44, wherein the CSI-RS configuration information includes multiple fields that can be combined into one field.

[0283] 47. The method of solution 44, wherein the CSI-RS configuration information indicates quasi co-location (QCL) information based on a certain number of configured CSI-RS resources.

[0284] 48. An apparatus for wireless communication, comprising a processor configured to implement the method according to any one of solutions 1 to 47.

[0285] 49. A computer-readable medium having codes stored thereon, which, when executed by a processor, cause the processor to implement the method according to any one of solutions 1 to 47.

[0286] Fig.12 12 is a block diagram representation of a portion of an apparatus according to some embodiments of the presently disclosed technology. Apparatus 1205 (e.g., a network device or base station or a wireless device (or UE)) may include processor electronics 1210 (e.g., a microprocessor) that implements one or more techniques presented in this document. Apparatus 1205 may include transceiver electronics 1215 for sending and / or receiving wireless signals via one or more communication interfaces (e.g., (multiple) antennas 1220). Apparatus 1205 may include other communication interfaces for sending and receiving data. Apparatus 1205 may include one or more memories (not explicitly shown) configured to store information, such as data and / or instructions. In some embodiments, processor electronics 1210 may include at least a portion of transceiver electronics 1215. In some embodiments, apparatus 1205 is used to implement at least some of the disclosed techniques, modules, or functions.

[0287] Some embodiments described herein are described in the general context of a method or process, which in one embodiment can be implemented by a computer program product, which is contained in a computer-readable medium, including computer-executable instructions, such as program codes, executed by a computer in a network environment. Computer-readable media may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), compact disk (CD), digital versatile disk (DVD), etc. Therefore, computer-readable media may include non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc., and program modules perform specific tasks or implement specific abstract data types. Computer executable instructions or processor executable instructions, associated data structures, and program modules represent examples of program codes for executing the steps of the method disclosed herein. Specific sequences of these executable instructions or associated data structures represent examples of corresponding actions for implementing the functions in such steps or processes.

[0288] Devices or modules can implement some disclosed embodiments using hardware circuits, software or a combination thereof. For example, hardware circuit implementations may include discrete analog and / or digital components, for example, these components are integrated as a part of a printed circuit board. Alternatively or additionally, disclosed components or modules may be implemented as application specific integrated circuits (ASICs) and / or field programmable gate arrays (FPGAs) devices. Some embodiments may additionally or alternatively include a digital signal processor (DSP), which is a dedicated microprocessor with an architecture optimized for the operational requirements of digital signal processing associated with the functions disclosed in this application. Similarly, various components or subcomponents within each module may be implemented in software, hardware or firmware. The connection between modules and / or components within the modules may be provided using any connection method and medium known in the art, including but not limited to communication using appropriate protocols over the Internet, a wired network or a wireless network.

[0289] Although this document contains many features, these features should not be interpreted as limitations on the scope of the claimed invention or the invention that can be claimed, but should be interpreted as descriptions of specific features of specific embodiments. Certain features described in this document in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented separately or in any suitable sub-combination in multiple embodiments. In addition, although the above-mentioned features may be described as working in certain combinations, and even initially required, in some cases, one or more features in the required combination may be deleted from the combination, and the required combination may be for sub-combinations or variations of sub-combinations. Similarly, although the operations are described in a particular order in the drawings, this should not be understood as requiring that the operations be performed in the particular order shown or in a sequential arrangement, or requiring that all described operations be performed to achieve the desired results.

[0290] Only a few implementations and examples are described, and other implementations, enhancements, and variations may be made based on what is described and illustrated in this disclosure.

Claims

1. A method of wireless communication, comprising: Prior to receiving the paging message, receiving paging configuration information at the wireless device, wherein the paging configuration information includes a paging indication including N*M bits, and the paging indication is followed by a channel state information reference signal (CSI-RS) resource availability indication including Q bits, wherein N, M, and Q are integers; monitoring the paging message based on the paging indication; as well as A CSI-RS is received according to the CSI-RS resource availability indication.

2. A method according to claim 1, wherein N is the number of paging occasions (PO) associated with the paging indication; wherein M is the number of PO groups within each PO in the PO; wherein each of the N*M bits is associated with a corresponding PO group in the PO groups; and wherein for each of the N*M bits, a value of 1 indicates that the associated PO group is paged, and a value of 0 indicates that the associated PO group is not paged. 3 . The method according to claim 1 , wherein each bit in the Q bits indicates whether a corresponding CSI-RS resource set is available. 4 . The method according to claim 3 , wherein a bit having a value of 1 in the Q bit indicates that a CSI-RS resource set corresponding to the bit having a value of 1 is available. The method of claim 1 , wherein the CSI-RS is a Tracking Reference Signal (TRS).

6. A method of wireless communication, comprising: Before sending a paging message, the network device sends paging configuration information. wherein the paging configuration information includes a paging indication including N*M bits, and the paging indication is followed by a channel state information reference signal (CSI-RS) resource availability indication including Q bits, wherein N, M, and Q are integers, wherein the paging indication is configured for use by the wireless device to monitor for the paging message; sending the CSI-RS resource according to the CSI-RS resource availability indication; and The paging message is sent according to the paging indication.

7. A method according to claim 6, wherein N is the number of paging occasions (PO) associated with the paging indication; wherein M is the number of PO groups within each PO in the PO; wherein each of the N*M bits is associated with a corresponding PO group in the PO groups; and wherein for each of the N*M bits, a value of 1 indicates that the associated PO group is paged, and a value of 0 indicates that the associated PO group is not paged.

8. The method according to claim 6, wherein each bit in the Q bits indicates whether a corresponding CSI-RS resource set is available. 9 . The method according to claim 8 , wherein a bit having a value of 1 in the Q bit indicates that a CSI-RS resource set corresponding to the bit having a value of 1 is available.

10. The method of claim 6, wherein the CSI-RS is a Tracking Reference Signal (TRS).

11. An apparatus for wireless communication, comprising a processor and a memory storing instructions, wherein the instructions are executed by the processor so that the apparatus: Prior to receiving the paging message, receiving paging configuration information at the device, wherein the paging configuration information includes a paging indication including N*M bits, and the paging indication is followed by a CSI-RS resource availability indication including Q bits, wherein N, M, and Q are integers; monitoring the paging message based on the paging indication; and A CSI-RS is received according to the CSI-RS resource availability indication.

12. An apparatus according to claim 11, wherein N is the number of paging occasions (PO) associated with the paging indication; wherein M is the number of PO groups within each PO in the PO; wherein each of the N*M bits is associated with a corresponding PO group in the PO groups; and wherein for each of the N*M bits, a value of 1 indicates that the associated PO group is paged, and a value of 0 indicates that the associated PO group is not paged. 13 . The apparatus according to claim 11 , wherein each bit in the Q bits indicates whether a corresponding CSI-RS resource set is available. 14 . The apparatus according to claim 13 , wherein a bit having a value of 1 in the Q bit indicates that a CSI-RS resource set corresponding to the bit having a value of 1 is available.

15. The apparatus of claim 11, wherein the CSI-RS is a tracking reference signal (TRS).

16. An apparatus for wireless communication, comprising a processor and a memory storing instructions, wherein the instructions are executed by the processor so that the apparatus: Before sending the paging message, the device sends paging configuration information. wherein the paging configuration information includes a paging indication including N*M bits, and the paging indication is followed by a channel state information reference signal (CSI-RS) resource availability indication including Q bits, wherein N, M, and Q are integers, wherein the paging indication is configured for use by the wireless device to monitor for the paging message; sending the CSI-RS resource according to the CSI-RS resource availability indication; and The paging message is sent according to the paging indication.

17. An apparatus according to claim 16, wherein N is the number of paging occasions (PO) associated with the paging indication; wherein M is the number of PO groups within each PO in the PO; wherein each of the N*M bits is associated with a corresponding PO group in the PO groups; and wherein for each of the N*M bits, a value of 1 indicates that the associated PO group is paged, and a value of 0 indicates that the associated PO group is not paged.

18. The apparatus of claim 16, wherein each bit in the Q bits indicates whether a corresponding CSI-RS resource set is available. 19 . The apparatus of claim 18 , wherein a bit having a value of 1 in the Q bit indicates that a CSI-RS resource set corresponding to the bit having a value of 1 is available.

20. The apparatus of claim 16, wherein the CSI-RS is a tracking reference signal (TRS).

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