CN117813870A

CN117813870A - User equipment, base station and wireless communication method

Info

Publication number: CN117813870A
Application number: CN202180101440.4A
Authority: CN
Inventors: 沙希德·简; 生嘉
Original assignee: Huizhou TCL Cloud Internet Corp Technology Co Ltd
Current assignee: Huizhou TCL Cloud Internet Corp Technology Co Ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2024-04-02
Also published as: WO2023010524A1

Abstract

Disclosed are a User Equipment (UE), a base station, and a wireless communication method. A wireless communication method performed by a UE, comprising configuring, by a base station, a physical downlink control channel (physical downlink control channel, PDCCH) based on a paging early indication (paging early indication, PEI), a mapping of PEI based on a secondary synchronization signal (secondary synchronization signal, SSS), and/or PEI based on a tracking reference signal (tracking reference signal, TRS)/channel state information reference signal (channel state information reference signal, CSI-RS), for indicating whether a UE subset monitors a PDCCH scrambled with a paging radio network temporary identifier (P-RNTI) at a Paging Occasion (PO), wherein if the UE subset detects PEI, the UE subset monitors PO, and if the UE subset does not detect the PEI, the UE subset does not monitor the PO. This may solve the problems in the prior art, reduce false paging, efficiently utilize physical resources and indicate paging subgroups of UEs with lower signaling overhead, and/or provide good communication performance.

Description

User equipment, base station and wireless communication method

Technical Field

The present application relates to the field of wireless communication systems, such as 5G New Radio (NR) wireless communication systems, and more particularly to User Equipment (UE), base stations, and wireless communication methods, which may provide potential paging enhancements for idle/inactive mode UEs. More particularly, the present application relates to a physical downlink control channel (physical downlink control channel, PDCCH) based on a paging early indication (paging early indication, PEI), PEI based on a secondary synchronization signal (secondary synchronization signal, SSS), and/or PEI to UE subgroup based on a tracking reference signal (tracking reference signal, TRS)/channel state information reference signal (channel state information reference signal, CSI-RS) for paging.

Background

Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These wireless communication systems are capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (fourth generation, 4G) systems such as long term evolution (long term evolution, LTE) systems and fifth generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems may employ techniques such as code division multiple access (code division multiple access, CDMA), time division multiple access (time division multiple access, TDMA), frequency division multiple access (frequency division multiple access, FDMA), orthogonal frequency division multiple access (orthogonal frequency division multiple access, OFDMA), or discrete fourier transform spread OFDM (discrete Fourier transform-spread-OFDM, DFT-S-OFDM). A wireless multiple-access communication system may include multiple base stations or network access nodes, each supporting communication for multiple communication devices, which may be otherwise referred to as User Equipment (UEs). The wireless communication network may include base stations capable of supporting communication for the UE. The UE may communicate with the base station via Downlink (DL) and Uplink (UL). DL refers to the communication link from a base station to a UE, and UL refers to the communication link from a UE to a base station.

The energy saving technology plays a key role in a 5G New Radio (NR) system to support low power consumption devices such as industrial wireless sensors, video monitoring and wearable devices. To conserve power and battery, the UE may use discontinuous reception (discontinuous reception, DRX) and spend a significant amount of time in radio resource control (radio resource control, RRC) idle/inactive mode. During the RRC idle/inactive mode, the UE remains in sleep mode, turns off Radio Frequency (RF), and periodically wakes up to monitor the physical downlink control channel (physical downlink control channel, PDCCH) to check for the presence of paging messages. However, decoding paging messages is complex and consumes a significant amount of power resources.

The paging procedure consumes more energy and wastes UE power, especially in so-called false paging situations, where the UE decodes the paging PDCCH and finds that it is not paged. Thus, to conserve power and reduce unnecessary UE paging reception, the 3GPP RAN working group approves Rel-17UE power saving enhanced work items, which include one goal: paging enhancement functions are studied and specified to reduce unnecessary UE paging reception without affecting legacy UEs RAN2, RAN 1.

In the 3GPP RAN1 105-e conference, in one protocol, it should be mentioned that for paging indication of a subset of UEs in PO, PDCCH-based PEI, SSS-based PEI, or TRS/CSI-RS-based PEI may be utilized. However, detailed mapping designs for UE subgroup indication for paging before using the PO of PDCCH-based PEI, SSS-based PEI or TRS/CSI-RS-based PEI are still under discussion, which has not been specifically proposed.

Accordingly, there is a need for a User Equipment (UE), a base station, and a wireless communication method that can solve the problems in the prior art, reduce false paging, efficiently utilize physical resources, and indicate a subset of UEs for paging with lower signaling overhead, and/or provide good communication performance.

Disclosure of Invention

The present application aims to provide a user equipment, a base station and a wireless communication method, which can solve the problems in the prior art, reduce false paging, effectively utilize physical resources, indicate UE subgroups for paging with lower signaling overhead, and/or provide good communication performance.

In a first aspect of the present application, a wireless communication method performed by a User Equipment (UE) includes configuring, by a base station, a physical downlink control channel (physical downlink control channel, PDCCH) based on a paging early indication (paging early indication, PEI), mapping of PEI based on a secondary synchronization signal (secondary synchronization signal, SSS), and/or PEI based on a tracking reference signal (tracking reference signal, TRS)/channel state information reference signal (channel state information reference signal, CSI-RS), for indicating whether a UE sub-group monitors a PDCCH scrambled with a paging radio network temporary identifier (paging-radio network temporary identifier, P-RNTI) at a Paging Occasion (PO), wherein the UE sub-group monitors a PO if the UE sub-group detects PEI, and does not monitor the PO if the UE sub-group does not detect the PEI.

In a second aspect of the present application, a wireless communication method performed by a base station includes configuring a User Equipment (UE) with a physical downlink control channel (physical downlink control channel, PDCCH) based on a paging early indication (paging early indication, PEI), a mapping of PEI based on a secondary synchronization signal (secondary synchronization signal, SSS), and/or PEI based on a tracking reference signal (tracking reference signal, TRS)/channel state information reference signal (channel state information reference signal, CSI-RS) for indicating whether a UE sub-group monitors a PDCCH scrambled with a paging radio network temporary identifier (paging-radio network temporary identifier, P-RNTI) at a Paging Occasion (PO), wherein the UE sub-group monitors a PO if the UE sub-group detects PEI, and does not monitor the PO if the UE sub-group does not detect the PEI.

In a third aspect of the present application, a User Equipment (UE) includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured by the base station with a physical downlink control channel (physical downlink control channel, PDCCH) based on a paging early indication (paging early indication, PEI), a mapping of PEI based on a secondary synchronization signal (secondary synchronization signal, SSS), and/or PEI based on a tracking reference signal (tracking reference signal, TRS)/channel state information reference signal (channel state information reference signal, CSI-RS) for indicating whether a UE subset monitors a PDCCH scrambled with a paging radio network temporary identifier (P-radio network temporary identifier, P-RNTI) at a Paging Occasion (PO), wherein if the UE subset detects PEI, the UE subset monitors PO, and if the UE subset does not detect the PEI, the UE subset does not monitor the PO.

In a fourth aspect of the present application, a base station includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to configure a User Equipment (UE) with a physical downlink control channel (physical downlink control channel, PDCCH) based on a paging early indication (paging early indication, PEI), a mapping of PEI based on a secondary synchronization signal (secondary synchronization signal, SSS), and/or PEI based on a tracking reference signal (tracking reference signal, TRS)/channel state information reference signal (channel state information reference signal, CSI-RS) for indicating whether a UE subgroup monitors a PDCCH scrambled with a paging radio network temporary identifier (paging-radio network temporary identifier, P-RNTI) at a Paging Occasion (PO), wherein the UE subgroup monitors a PO if the UE subgroup detects PEI and does not monitor the PO if the UE subgroup does not detect the PEI.

In a fifth aspect of the invention, a non-transitory machine-readable storage medium having instructions stored thereon, which when executed by a computer, cause the computer to perform the above-described method.

In a sixth aspect of the present application, there is provided a chip comprising a processor configured to invoke and run a computer program stored in a memory to cause a device on which the chip is mounted to perform the above method.

In a seventh aspect of the present application, a computer readable storage medium is provided, storing a computer program, wherein the computer program causes a computer to perform the above method.

In an eighth aspect of the present application, a computer program product is provided, comprising a computer program, wherein the computer program causes a computer to perform the above method.

In a ninth aspect of the present application, a computer program is provided, which causes a computer to perform the above method.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a block diagram of one or more User Equipment (UE) and a base station (e.g., a gNB) communicating in a communication network system according to an embodiment of the present application.

Fig. 2 is a flowchart illustrating a wireless communication method performed by a User Equipment (UE) according to an embodiment of the present application.

Fig. 3 is a flowchart illustrating a wireless communication method performed by a base station according to an embodiment of the present application.

Fig. 4 is a schematic diagram illustrating an example of generic code point based mapping to UE subgroups according to an embodiment of the present application.

Fig. 5 is a schematic diagram illustrating an example of one paging occasion per paging frame according to an embodiment of the present application.

Fig. 6 is a schematic diagram illustrating an example of two paging occasions per paging frame according to an embodiment of the present application.

Fig. 7 is a schematic diagram illustrating an example of four paging occasions per paging frame according to an embodiment of the present application.

Fig. 8 shows a schematic diagram of an example in which each code point is mapped to a PRB in a physical resource according to an embodiment of the present invention.

Fig. 9 shows a schematic diagram of an example of mapping of code points to physical resource blocks according to an embodiment of the present invention.

Fig. 10 is a diagram illustrating an example of RB mapping for SSS-based PEI with UE subgroup indication according to an embodiment of the present application.

Fig. 11 is a schematic diagram illustrating an example of RE mapping for TRS/CSI-RS based PEI with UE subgroup indication "cdm8-FD2-TD4" based according to an embodiment of the present application.

Fig. 12 is a schematic diagram illustrating an example of RE mapping for TRS/CSI-RS based PEI with UE subgroup indication "cdm8-FD4-TD2" according to an embodiment of the present application.

Fig. 13 is a schematic diagram illustrating an example of RE mapping for TRS/CSI-RS based PEI with UE subgroup indication "cdm8-FD-TD8" according to an embodiment of the present application.

Fig. 14 is a schematic diagram illustrating an example of TRS/CSI-RS based PEI and UE subgroup based indication "cdm8-FD8-TD" based RE mapping according to an embodiment of the present application.

Fig. 15 is a block diagram of a wireless communication system according to an embodiment of the present application.

Detailed Description

The technical matters, structural features, achieved objects and effects of the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In particular, the terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The energy-saving technology plays a key role in a 5G New Radio (NR) system to support low-power consumption equipment such as industrial wireless sensors, video monitoring and wearable equipment. To save power and battery, the UE uses discontinuous reception (Discontinuous Reception, DRx) and spends a lot of time in RRC-IDLE/inactive mode. During idle/inactive mode, the UE remains in sleep mode, turns off RF and wakes up periodically to monitor PDCCH to check for the presence of paging messages. However, decoding paging messages is complex and consumes a significant amount of power resources. Generally, the UE performs paging listening as follows: the ue wakes up before the paging occasion. 2. The radio frequency and baseband are turned on. Agc and time frequency synchronization (loop convergence for short) and serving cell acknowledgement. 4. PDCCH decoding is attempted for DCI scrambled with P-RNTI. 5. If no paging is found, the UE enters DRX.6. If paging DCI is found, the UE decodes the corresponding PDSCH according to the payload. 7. If the UE identity is contained in PDSCH, the UE initiates RACH procedure, otherwise the UE returns to DRX.

The paging procedure consumes more energy and wastes UE power, especially in so-called false paging situations, where the UE decodes the paging PDCCH and finds that it is not paged. Thus, to conserve power and reduce unnecessary UE paging reception, the 3GPP RAN working group approves Rel-17UE power saving enhanced work items, which include the following goals: 1) Consider a system that specifies enhanced performance aspects of idle/inactive mode UE power saving RAN2, RAN 1. a) Paging enhancements are studied and specified to reduce unnecessary UE paging reception while not affecting legacy UEs RAN2, RAN 1. b) Methods are specified to provide idle/inactive mode UEs with potential TRS/CSI-RS opportunities available in connected mode, minimizing overhead impact RAN 1.

To reduce unnecessary paging and save power, UE subgroup paging is an effective method, which essentially results in a decrease in paging rate per group, thereby achieving a reduction in false paging. Similarly, a Paging early indication (Paging Early Indication, PEI) is introduced in Rel-17 Paging enhancements, where PEI is sent before the target Paging Occasion (PO) to indicate whether the UE's subgroup monitors PDCCH scrambled with P-RNTI. If PEI is detected, the UE subset wakes up the baseband and begins the paging procedure. If PEI is not detected, the UE subset remains in sleep mode, avoiding unnecessary paging, and thus conserving power. Furthermore, in the 3ggp ran1#104-e conference, two different UE behaviors for the presence/absence of PEI are agreed upon, as shown in the following protocol.

Protocol: for evaluation and comparison of PDCCH, TRS/CSI-RS and SSS based PEI candidate designs, the following is assumed: behv-A: PEI indicates that if a group/subgroup of UEs is paged, the UE should monitor the PO. If the UE does not detect PEI on all PEI occasions of the PO, the UE does not need to monitor the PO. Behv-B: PEI indicates whether the UE should monitor the PO. If the UE does not detect PEI on all PEI occasions of the PO, the UE needs to monitor the PO.

In 3GPP RAN1#105-e conference, PEI based on PDCCH, PEI based on Secondary synchronization signals (Secondary Synchronization Signal, SSS) and PEI based on tracking reference signals/channel state information reference signals (Tracking Reference Signal/Channel Status Information Reference Signal, TRS/CSI-RS) are discussed and agree to further study code point based mapping designs of PEI based on PDCCH, sequence mapping designs of PEI based on SSS, and sequence mapping designs of PEI based on TRS/CSI-RS for UE subgroup paging indication.

The goal of PEI is to avoid unnecessary UE paging and save power. However, the following problems are presented with regard to PDCCH-based PEI, SSS-based PEI and TR/CSI-RS-based PEI designs and their mapping to UE subgroups. Whether code point based mapping is used for PDCCH based PEI and if so, how to map to a subgroup in the PO. For SSS-based PEI, how to design sequence mapping to support up to 8 subgroups per PO. For PEI of base TRS/CSI-RS, whether one TRS sequence with orthogonal coverage, a set of TRS sequences indicating a subset, or multiple TRS resources are used in the same monitoring occasion to indicate a subset of UEs for paging.

In some embodiments, the primary objects of the invention are summarized as follows: for PDCCH-based PEI, a code point-based mapping is used to indicate a subset of UEs paging at the POs, where the payload of the code point is designed according to the number of POs configured per PF. For SSS-based PEI, a one-to-one sequence-based mapping and a common sequence-based mapping design are discussed to indicate a subset of UEs paging at the PO. For TRS/CSI-RS based PEI, several orthogonal CDM sequences of TRS/CSI-RS and combinations thereof are proposed to create an indicator code to indicate a subset of UEs paging at the PO.

Some embodiments of the present application discuss the advantages of the present invention: 1. indicating whether a subgroup of UEs listens to PDCCH scrambled with P-RNTI at the PO before the target PO, thereby reducing false paging. 2. The physical resources are efficiently utilized and the UE subgroup for paging is indicated with lower signaling overhead using code point-based mapping, one-to-one sequence mapping, common sequence mapping, and several orthogonal CDM type sequence mappings to the UE subgroup.

Fig. 1 illustrates that in some embodiments, one or more User Equipments (UEs) 10 and base stations (e.g., gnbs) 20 for communicating in a communication network system 30 are provided in accordance with embodiments of the present application. The communication network system 30 includes one or more UEs 10 and a base station 20. One or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be configured to implement the proposed functions, processes and/or methods described in the present specification. The radio interface protocol layer may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled to the processor 11 or 21 and stores various information to operate the processor 11 or 21. The transceiver 13 or 23 is operatively coupled to the processor 11 or 21, and the transceiver 13 or 23 transmits and/or receives radio signals.

The processor 11 or 21 may include an Application Specific Integrated Circuit (ASIC), other chipset, logic circuit, and/or data processing device. Memory 12 or 22 may include Read Only Memory (ROM), random Access Memory (RAM), flash memory, memory cards, storage media, and/or other storage devices. The transceiver 13 or 23 may include baseband circuitry to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. These modules may be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 may be implemented within the processor 11 or 21 or external to the processor 11 or 21, in which case they can be communicatively coupled to the processor 11 or 21 via various means as is known in the art.

In some embodiments, the processor 11 is configured by the base station 20 with a physical downlink control channel (physical downlink control channel, PDCCH) based on a paging early indication (paging early indication, PEI), a mapping of PEI based on a secondary synchronization signal (secondary synchronization signal, SSS), and/or PEI based on a tracking reference signal (tracking reference signal, TRS)/channel state information reference signal (channel state information reference signal, CSI-RS) for indicating whether a UE subset monitors a PDCCH scrambled with a paging radio network temporary identifier (paging-radio network temporary identifier, P-RNTI) at a Paging Occasion (PO), wherein if the UE subset detects PEI, the UE subset monitors PO, and if the UE subset does not detect the PEI, the UE subset does not monitor the PO. This can solve the problems in the prior art, reduce false paging, efficiently utilize physical resources and indicate a subset of UEs for paging with lower signaling overhead, and/or provide good communication performance.

In some embodiments, the processor 21 is configured to configure the User Equipment (UE) 10 with a mapping of a physical downlink control channel (physical downlink control channel, PDCCH) based on a paging early indication (paging early indication, PEI), PEI based on a secondary synchronization signal (secondary synchronization signal, SSS), and/or PEI based on a tracking reference signal (tracking reference signal, TRS)/channel state information reference signal (channel state information reference signal, CSI-RS) for indicating whether a UE subgroup monitors a PDCCH scrambled with a paging radio network temporary identifier (paging-radio network temporary identifier, P-RNTI) at a Paging Occasion (PO), wherein the UE subgroup monitors a PO if the UE subgroup detects PEI and does not monitor the PO if the UE subgroup does not detect the PEI. This can solve the problems in the prior art, reduce false paging, efficiently utilize physical resources and indicate a subset of UEs for paging with lower signaling overhead, and/or provide good communication performance.

Fig. 2 illustrates a wireless communication method 200 for execution by a User Equipment (UE) in accordance with an embodiment of the present application. In some embodiments, the method 200 includes: step 202, configuring, by a base station, a physical downlink control channel (physical downlink control channel, PDCCH) based on a paging early indication (paging early indication, PEI), a mapping of PEI based on a secondary synchronization signal (secondary synchronization signal, SSS), and/or PEI based on a tracking reference signal (tracking reference signal, TRS)/channel state information reference signal (channel state information reference signal, CSI-RS) for indicating whether a UE subset monitors a PDCCH scrambled with a paging radio network temporary identifier (P-radio network temporary identifier, P-RNTI) at a Paging Occasion (PO), wherein if the UE subset detects PEI, the UE subset monitors PO, and if the UE subset does not detect the PEI, the UE subset does not monitor the PO. This can solve the problems in the prior art, reduce false paging, efficiently utilize physical resources and indicate a subset of UEs for paging with lower signaling overhead, and/or provide good communication performance.

Fig. 3 illustrates a wireless communication method 300 for execution by a base station in accordance with an embodiment of the present application. In some embodiments, the method 300 includes: step 302, configuring a User Equipment (UE) with a physical downlink control channel (physical downlink control channel, PDCCH) based on a paging early indication (paging early indication, PEI), a mapping of PEI based on a secondary synchronization signal (secondary synchronization signal, SSS), and/or PEI based on a tracking reference signal (tracking reference signal, TRS)/channel state information reference signal (channel state information reference signal, CSI-RS) for indicating whether a UE subset monitors a PDCCH scrambled with a paging radio network temporary identifier (paging-radio network temporary identifier, P-RNTI) at a Paging Occasion (PO), wherein if the UE subset detects PEI, the UE subset monitors PO, and if the UE subset does not detect the PEI, the UE subset does not monitor the PO. This can solve the problems in the prior art, reduce false paging, efficiently utilize physical resources and indicate a subset of UEs for paging with lower signaling overhead, and/or provide good communication performance.

In some embodiments, for the PDCCH-based PEI, a code point-based mapping is used to indicate the subset of UEs paging at the POs, where the payload of a code point is configured according to the number of POs per Paging Frame (PF). In some embodiments, 8 UE subgroups for paging in the PO are indicated using a number of code points from one PDCCH-based PEI payload, the number of code points being denoted as 2 ^N Where N is the number of bits used in the code point payload, ranging from 3 to 5, and the number of POs per PF configuration is {1,2,4}. In some embodiments, the code point is transmitted by the base station in the PDCCH-based PEI using an aggregation level (aggregation level, AL), the AL comprising AL4 or AL8. In some embodiments, the code points may be mapped to physical resources by frequency division multiplexing (frequency division multiplexing, FDM) or time division multiplexing (time division multiplexing, TDM), and each code point is mapped to one physical resource block (physical resource block, PRB) of the physical resources. In some embodiments, in the PDCCH-based PEI, the mapping based on the code points indicates that the amount of resources consumed by the subset of UEs for paging is dependent on an AL of the PDCCH-based PEI. In some embodiments, for the SSS-based PEI, a one-to-one sequence-based mapping and a common sequence-based mapping are used to indicate the subset of UEs paging at the PO.

In some embodiments, in the PO, when a part of the UE subgroups need paging and a part of the UE subgroups do not need paging, a one-to-one mapping of 8 sequences is used for 8 UE subgroups. In some embodiments, the physical resource mapping of 8 different sequences, each sequence associated with said UE subgroup for paging, FDMed is performed in PRBs of the entire available bandwidth for PEI transmission. In some embodiments, for the TRS/CSI-RS-based PEI, the TRS/CSI-RS orthogonal code division multiplexing (coded division multiplexed, CDM) sequenceColumns and combinations thereof are used to provide an indication code to indicate the subset of UEs paging at the PO. In some embodiments, the TRS/CSI-RS-based PEI is a sequence-based PEI and the sequences r (m) generated for each configured TRS/CSI-RS-based PEI are the UE subsets assuming the sequences r (m) are mapped to resource elements (k, l), where k is a frequency domain physical resource map and l is a time domain physical resource map within one resource block, the sequences generated by r (m) are used to define the quantities k 'and l' for an orthogonal CDM sequence w of size 8 _f (k') and w _t (l ') corresponds to 8 UE subgroup indications for paging, and k ' and l ' index resource elements within CDM group. In some embodiments, the TRS/CSI-RS-based PEI is a sequence-based PEI and the sequences r (m) generated for each configured TRS/CSI-RS-based PEI are the UE subsets assuming the sequences r (m) are mapped to resource elements (k, l), where k is a frequency domain physical resource map and l is a time domain physical resource map within one resource block, the sequences generated by r (m) are used to define the quantities k 'and l' for an orthogonal CDM sequence w of size 8 _f (k') and w _t (l ') corresponds to 8 UE subgroup indications for paging, and k ' and l ' index resource elements within CDM group. Specifically, the TRS/CSI-RS based PEI is a sequence-based PEI, and the sequence of the TRS/CSI-RS based PEI is generated by the following equation:

in some embodiments, 4 numerically orthogonal CDM groups are defined, each CDM group sized 8CDM8, with only one CDM8 being used at the target PO to indicate 8 UE subgroups per PO page. In some embodiments, the first type of CDM group is CDM8-FD2-TD4, the second type of CDM group is CDM8-FD4-TD2, the third type of CDM group is CDM8-FD-TD8, and/or the fourth type of CDM group is CDM8-FD8-TD. In some embodiments, the numerical orthogonal sequences of the first type of CDM group, the second type of CDM group, the third type of CDM group, and/or the fourth type of CDM group are FDMed or TDMed and are applied to the TRS/CSI-RS based PEI to provide an indication code of the orthogonal sequence combination indicated by the UE subgroup for paging. In some embodiments, each combination of orthogonal sequences of the first, second, third, and/or fourth type CDM groups provides an indicator code corresponding to index J, where j= {0,1,2,3,4,5,6,7}, each indicator code mapped to the UE subgroup to indicate paging at the PO, and/or each indicator code of each combination of orthogonal sequences of the first, second, third, and/or fourth type CDM groups corresponding to index J is FDMed or TDMed on physical resources.

Some embodiments of the present application further discuss physical layer mapping designs of PDCCH-based PEI, SSS-based PEI, and TRS/CSI-RS-based PEI to a subset of UEs for paging indication in the PO. The mapping design of PDCCH-based PEI, SSS-based PEI and TRS/CSI-RS-based PEI to UE subset of paging indication is based on Behv-a, where Behv-a is defined in the RAN1#104-e protocol as: if the UE subgroup detects PEI, the UE subgroup will monitor the PO; if the UE subgroup does not detect PEI, the UE subgroup will not monitor the PO. Some embodiments discuss a code point based mapping design to indicate paging for a subset of UEs in a PO. Some embodiments discuss SSS-based sequence mapping designs to indicate a subset of UEs for paging. Some embodiments discuss a TRS/CSI-RS based mapping design to indicate a subset of UEs for paging.

In some embodiments, for PDCCH-based PEI mapped to a UE subgroup, the PDCCH-based PEI uses one PEI to indicate the subgroup for paging in the PO, where one bit in the DCI payload indicates one subgroup agreed in the 3gpp RAN1 105-e conference. Similarly, a code point based mapping may also be used to indicate a subset of UEs in the PO for paging. To this end, this embodiment of the present application describes a code point based mapping to a subset of UEs in the PO and a code point based mapping to physical resources.

Fig. 4 shows an example of a generic code point based mapping to UE subgroups according to an embodiment of the present application. In one embodiment, a code point based mapping to a subset of UEs in a PO is provided. The embodiment of the invention adopts the mapping based on the code points to instruct the subgroup of the UE in the PO to page. Since the 3GPP RAN1 105-e conference has agreed, a maximum of 8 subgroups are supported per PO for subgroup indication by the physical layer UE. Thus, the mapping design of the present invention is mainly directed to the 8 UE subgroups in the PO. A general illustrative example of a code point based mapping is shown in fig. 4, where 8 code points from one PDCCH-based PEI payload are used to indicate 8 UE subgroups for paging in the PO.

The number of code points and size for mapping 8 UE subgroups can be expressed as 2 ^N Where N is the number of bits used in the payload design and ranges from 3.ltoreq.N.gtoreq.5. The payload size of each code point may be designed based on the number of POs in the Paging Frame (PF). According to Rel-16 Specification [ TS 38.304 ]]A paging frame may contain one or more POs or starting points of POs, which may be configured according to a paging search space. The number of POs per PF configuration may be {1,2,4}. Therefore, the embodiment of the invention designs the payload size of each code point to indicate 8 UE subgroups paged in PO according to the quantity of PO in PF. Fig. 5 illustrates an example of one paging occasion per paging frame in accordance with an embodiment of the present disclosure. For example, when the number of POs configured in the PF is 1, as shown in fig. 5, the size of the code points may be n=3 bits, and the total number of code points may be (2 ³ ) 8, wherein each code point is used to map a subset of 8 UEs from 0 to 7, as shown in table 1.

Table 1: 2 mapped to 8 UE subgroups ³ Code point

Code point	Subgroup index
		000	Subgroup 0
001	Subgroup 1
		010	Subgroup 2
011	Subgroup 3
		100	Subgroup 4
101	Subgroup 5
		110	Subgroup 6
111	Subgroup 7

Fig. 6 shows an example of two paging occasions per paging frame according to an embodiment of the present application. Similarly, when the number of POs configured in the PF is 2, as shown in fig. 6, the size of the code points may be n=4, and the total number of code points may be (2 ⁴ ) 16, into two groups of code points. Wherein the first set of code points indicates the 8 UE subgroups for paging in PO1 and the second set of code points indicates the 8 UE subgroups for paging in PO2, as shown in table 2.

Table 2: 2 mapped to 8 UE subgroups ⁴ Code point

Fig. 7 shows a schematic diagram of an example of four paging occasions per paging frame according to an embodiment of the present application. When the number of POs configured in the PF is 4, as shown in fig. 7, the size of the code points may be n=5, and the total number of the code points may be (2 ⁵ ) 32, into four groups of code points. Wherein the first code point set indicates 8 UE subgroups paged in PO1, and the second code point set indicates 8 UE subgroups paged in PO2The third code point set indicates 8 UE subgroups for PO3 paging and the fourth code point set indicates 8 UE subgroups for PO4 paging, as shown in table 3, respectively.

Table 3: 2 mapped to 8 UE subgroups ³ Code point

In 5G NR, the maximum number of PO in one PF is 4, so in order to effectively utilize the number of code points, some embodiments of the present application propose to keep the value of N (the payload size of the code points) within a range of 3.ltoreq.N.gtoreq.5. Using a value of N below a specified range, e.g., n=2, the number of code points available for paging indication will be (2 ² ) 4, are insufficient to cover 8 UE subgroups for paging indication in the PO. Similarly, increasing the value of N within a specified range, e.g., n=6, the number of code points available for paging indication will be (2 ⁶⁾ 64, this increases the payload of the codepoints and the extra number of codepoints will be wasted. Therefore, it is suggested to maintain the size of the code points n= {3,4,5}, to effectively utilize the code points of 1 PO in the PF, 2 POs in the PF, and 4 POs in the PF, respectively.

Fig. 8 shows an example of mapping each code point to PRBs in physical resources according to an embodiment of the present application. In an embodiment, a code point based mapping to physical resources is provided. In the embodiments of the present application, code point mapping of PDCCH-based PEI to physical resources is discussed. As discussed in the above embodiments, the payload for indicating each code point of the 8 UE subsets in the PO for paging may be 3 bits, 4 bits or 5 bits. These code points may be transmitted by the gNB in PDCCH-based PEI using an Aggregation Level (AL) 4 or AL 8. Here we explain an example of mapping PDCCH-based PEI code points to physical resources using AL 4. The code points may be mapped to physical resources in an FDM fashion. Wherein each code point is mapped to a PRB in a physical resource as shown in fig. 8. Since 1 PRB contains 12 REs and 1 PRB can accommodate X bits, depending on the modulation scheme used for mapping purposes. Thus, one PRB may be used to map at least one code point.

Fig. 9 shows an example of mapping each code point to a physical resource block according to an embodiment of the present application. The code points of PDCCH-based PEI may be mapped to physical resources in a TDM fashion, where each code point is mapped to a physical resource block as shown in fig. 9. In some embodiments, in PDCCH-based PEI, the amount of resources consumed for code point-based mapping for indicating a subset of UEs for paging depends on the aggregation level of PDCCH-based PEI. For example, using AL4, PDCCH-based PEI transmissions would consume 24 PRBs (288 REs), although the code points mapped to the physical resources may consume a smaller number of PRBs. Thus, there is a waste of physical resources in PDCCH-based PEI, especially if the number of subgroups for paging is small or the payload size of the code point is small.

In an embodiment, SSS-based PEI mapping is provided to a subset of UEs. Embodiments of the present application explain SSS-based PEI sequence mapping designs to indicate 8 UE subgroups per PO for paging. SSS-based PEI is sequence-based PEI and its sequence d _SSS (n) may be generated by the following equation as defined in TS 38.211.

d _SSS (n)＝[1-2x ₀ ((n+m ₀ )mod127)][1-2x ₁ ((n+m ₁ )mod127)]

Wherein->And- >

In SSS-based PEI, a maximum of 8 sequences are required for 8 UE subgroups, where each sequence is associated with a subgroup of UEs for paging indication. Similarly, a common sequence may also be generated, which may indicate paging subgroups for all UEs.

In some embodiments of the present application, it is proposed to use a one-to-one mapping of 8 sequences to a subset of 8 UEs in the case that some UE subsets need paging and some UE subsets do not need paging in the PO. When all 8 UE subgroups need to be paged in the PO, a common sequence may be used, as shown in table 4.

Table 4: sequence mapping for UE subgroups for paging indication

Sequence index	UE subgroup mapping
		Sequence 0	Subgroup 0
Sequence 1	Subgroup 1
		Sequence 2	Subgroup 2
Sequence 3	Subgroup 3
		Sequence 4	Subgroup 4
Sequence 5	Subgroup 5
		Sequence 6	Subgroup 6
Sequence 7	Subgroup 7
		Sequence 8	All subgroups of

In some embodiments, an advantage of one-to-one mapping is that if more than 1 subgroup is mapped to a common sequence in each group of resources, paging indications for all associated subgroups may be triggered, some of which may not need paging, wasting power. Furthermore, each sequence may be transmitted in a different set of resources to avoid additional interference between different sequences. The advantage of mapping the common sequence to all UE subgroups is that physical resources can be saved and interference that may occur due to simultaneous transmission of many one-to-one sequences can be avoided. Fig. 10 shows an example of RB mapping for SSS-based PEI with UE subgroup indication, according to an embodiment of the present application. Physical resource mapping of 8 different sequences, each sequence associated with a subset of UEs for paging, may be FDMed in a Physical Resource Block (PRB) of the entire available bandwidth for PEI transmission, as shown in fig. 10.

In an embodiment, a TRS/CSI-RS based PEI mapping to a subset of UEs is provided. This embodiment of the present application explains the design of a TRS/CSI-RS based PEI sequence mapping to indicate 8 UE subsets per PO for paging. The TRS/CSI-RS based PEI is a sequence based PEI and its sequence can be generated by the following equation as defined in TS 38.211. For each TRS/CSI-RS based PEI configured, the UE subgroup shall assume that the sequence r (m) maps to resource elements (k, l), where k is the physical resource map in the frequency domain, and l is when the physical resource map is within a resource blockIn the domain. The sequences generated by r (m) can be used to define the quantities k 'and l', and an orthogonal Code Division Multiplexing (CDM) sequence w of size 8 _f (k') and w _t (l') corresponds to a UE subgroup indication for paging. Where indexes k 'and l' index resource elements within the CDM group. Embodiments of the present application define 4 types of digital orthogonal CDM groups, and each CDM group is 8 in size, CDM8, to indicate 8 UE subgroups for each PO page, as explained in the embodiments below.

Fig. 11 shows an example of RE mapping for TRS/CSI-RS based PEI with UE subgroup indication "cdm8-FD2-TD4" according to an embodiment of the present application. The first type of CDM group is the Rel-16 Specification [ TS 38.211 ] ]Cdm8-FD2-TD4 as defined in (3). Numerical orthogonal sequence w of cdm8-FD2-TD4 _f (k') and w _t (l') is shown in Table 5. These sequences w of cdm8-FD2-TD4 _f (k') and w _t (l') frequency division multiplexing (Frequency Division Multiplexed, FDMed) and time division multiplexing (Time Division Multiplexed, TDMed) can be performed and applied to TRS/CSI-RS based PEI to create a sequence combination w of 8 UE subgroups _f (k') and w _t The indicator of (l') is shown in Table 6. In Table 6, the orthogonal sequence w of cdm8-FD2-TD4 _f (k') and w _t Each combination of (l') creates a unique indicator code corresponding to index J, where j= {0,1,2,3,4,5,6,7}. Each indicator code may be mapped to a subset of UEs to indicate paging at the PO. For example, w of cdm8-FD2-TD4 _f (k') and w _t The sequence combination of (l ') creates 8 unique indicator codes, each corresponding to the index j= {0,1,2,3,4,5,6,7}, which can be mapped to the UE's subgroup = {0,1,2,3,4,5,6,7}, respectively, as shown in table 6. Orthogonal sequence combination w of cdm8-FD2-TD4 _f (k') and w _t The physical resource map of each indicator of (l') is shown in fig. 11. Orthogonal sequence combination w of cdm8-FD2-TD4 corresponding to index J _f (k') and w _t Each indicator of (l') is FDMed and TDMed in a physical resource.

Table 5: a cdm-type numerical orthogonal sequence w equal to "cdm8-FD2-TD4 _f (k') and w _t (l′)

Table 6: w (w) _f (k') and w _t Sequence combining of (l'), supporting 8 UE subgroups per "cdm8-FD2-TD4

Fig. 12 shows an example of RE mapping for TRS/CSI-RS based PEI with UE subgroup indication "cdm8-FD4-TD2" according to an embodiment of the present application. A second type of CDM group proposed by some embodiments of the present application is CDM8-FD4-TD2. Numerical orthogonal sequence w of cdm-Type cdm8-FD4-TD2 _f (k') and w _t (l') is shown in Table 7. These sequences w of cdm8-FD4-TD2 _f (k') and w _t (l') FDMed and TDMed may be performed and applied to TRS/CSI-RS based PEI to create an indicator code for 8 UE subgroups as shown in table 8. In Table 8, the orthogonal sequence w of cdm8-FD4-TD2 _f (k') and w _t Each combination of (l') creates a unique indicator code corresponding to index J, where j= {0,1,2,3,4,5,6,7}. Each indicator code may be mapped to a subset of UEs to indicate a page before the PO. For example, the w of cdm8-FD4-TD2 _f (k') and w _t The sequence combination of (l') creates 8 unique indicator codes, each corresponding to the index j= {0,1,2,3,4,5,6,7}, which can be mapped to UE subgroup = {0,1,2,3,4,5,6,7}, respectively. Orthogonal sequence combination w of cdm8-FD4-TD2 _f (k') and w _t The physical resource map of each indicator of (l') is shown in fig. 12. Orthogonal sequence combination w of cdm8-FD4-TD2 corresponding to index J _f (k') and w _t Each indicator of (l') is FDMed and TDMed in a physical resource.

Table 1: numerical orthogonal sequence w with cdm type equal to' cdm8-FD4-TD2 _f (k') and w _t (l′)

Table 2: w supporting 8 UE subsets per "cdm8-FD4-TD2 _f (k') and w _t Sequence combination of (l')

Fig. 13 shows an example of RE mapping for TRS/CSI-RS based PEI with UE subgroup indication "cdm8-FD-TD8" according to an embodiment of the present application. The third CDM group proposed by the embodiment of the present invention is CDM8-FD-TD8. Numerical orthogonal sequence w of cdm-Type cdm8-FD-TD8 _f (k') and w _t (l') is shown in Table 9. These orthogonal sequences w of cdm8-FD-TD8 _f (k') and w _t (l') TDM processing may be performed and applied to TRS/CSI-RS based PEI to create an indication code for 8 UE subgroups, as shown in table 10. In Table 10, the orthogonal sequence w of cdm8-FD-TD8 _f (k') and w _t Each combination of (l') creates a unique indicator code corresponding to index J, where j= {0,1,2,3,4,5,6,7}. Each indicator code may be mapped to a subset of UEs to indicate a page before the PO. For example, the w of cdm8-FD-TD8 _f (k') and w _t The sequence combination of (l') creates 8 unique indicator codes, each indicator code corresponding to the index j= {0,1,2,3,4,5,6,7}, which can be mapped to UE subgroup = {0,1,2,3,4,5,6,7}, respectively. Orthogonal sequence combination w of cdm8-FD-TD8 _f (k') and w _t The physical resource map of each indicator is shown in fig. 13. Orthogonal sequence combination w of cdm8-FD-TD8 corresponding to index J _f (k') and w _t Each indicator of (l') is time division multiplexed in the physical resource.

Table 3: numerical orthogonal sequence w with cdm type equal to' cdm8-FD-TD8 _f (k') and w _t (l′)

Table 4: w supporting 8 UE subsets per "cdm8-FD-TD8 _f (k') and w _t Sequence combination of (l')

Fig. 14 shows an example of RE mapping for TRS/CSI-RS based PEI with "cdm8-FD8-TD" based on UE subgroup indication according to an embodiment of the present application. The fourth CDM group proposed in the embodiments of the present application is CDM8-FD8-TD. Orthogonal sequence w of cdm-Type cdm8-FD8-TD _f (k') and w _t (l') is shown in Table 11. These orthogonal sequences w of cdm8-FD-TD8 _f (k') and w _t (l') FDM processing may be performed and applied to TRS/CSI-RS based PEI to create 8 unique indication codes for 8 UE subgroups, as shown in table 12. In Table 12, the orthogonal sequence w of cdm8-FD8-TD _f (k') and w _t Each combination of (l') creates a unique indicator code corresponding to index J, where j= {0,1,2,3,4,5,6,7}. Each indicator code may be mapped to a subset of UEs to indicate a page before the PO. For example, the w of cdm8-FD8-TD _f (k') and w _t The orthogonal sequence combination of (l') creates 8 unique indicator codes, each corresponding to the index j= {0,1,2,3,4,5,6,7}, which can be mapped to UE subgroups= {0,1,2,3,4,5,6,7}, respectively. Orthogonal sequence combination w of cdm8-FD8-TD _f (k') and w _t The physical resource map of each indicator is shown in fig. 14. Orthogonal sequence combination w of cdm8-FD8-TD corresponding to cable J _f (k') and w _t Each indicator of (l') is FDMed in a physical resource.

Table 5: numerical orthogonal sequence w of cdm-Type equal to "cdm8-FD8-TD _f (k') and w _t (l′)

Table 6: w supporting 8 UE subsets per "cdm8-FD8-TD _f (k') and w _t (l')Sequence combination

The commercial benefits of some embodiments are as follows. 1. The problems in the prior art can be solved. 2. And the false paging is reduced. 3. Physical resources are efficiently utilized and subgroups for paging UEs are indicated with lower signaling overhead. 4. Providing good communication performance. 5. Some embodiments of the present application are implemented by 5G-NR chipset vendors, V2X communication system development vendors, automotive manufacturers including cars, trains, trucks, buses, bicycles, motorcycles, helmets, etc., unmanned aerial vehicles (unmanned aerial vehicles), smart phone manufacturers, public safety communication devices, AR/VR device manufacturers, such as games, meetings/seminars, educational objectives. Some embodiments of the present application are a combination of "technologies/procedures" that may be employed in the 3GPP specifications to create the end product. Some embodiments of the present application propose a technical mechanism.

Fig. 15 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present application. The embodiments described herein may be implemented into a system using any suitably configured hardware and/or software. Fig. 15 illustrates a system 700 that includes Radio Frequency (RF) circuitry 710, baseband circuitry 720, application circuitry 730, memory/storage 740, display 750, camera 760, sensor 770, and input/output (I/O) interface 780 coupled to one another, at least as shown. Application circuitry 730 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor may comprise any combination of general-purpose processors and special-purpose processors, such as graphics processors, application processors. The processor may be coupled with the memory/storage and configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems running on the system.

While the present application has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the present application is not to be limited to the disclosed embodiment, but is intended to cover various arrangements made without departing from the scope of the broadest interpretation of the appended claims.

Claims

1. A wireless communication method performed by a user equipment, UE, comprising:

configuring, by a base station, a physical downlink control channel, PDCCH, based on a paging early indication, PEI, based on a secondary synchronization signal, SSS, and/or PEI, based on a tracking reference signal, TRS, channel state information, CSI-RS, for indicating whether a UE subset monitors a PDCCH scrambled with a paging radio network temporary identifier, P-RNTI, at a paging occasion, PO, wherein the UE subset monitors a PO if the UE subset detects PEI, and the UE subset does not monitor the PO if the UE subset does not detect the PEI.

2. The method of claim 1, wherein for the PDCCH-based PEI, a code point-based mapping is used to indicate the subset of UEs paging at the POs, wherein a payload of a code point is based on a number of POs configured per paging frame PF.

3. The method of claim 2, wherein a number of code points from a PDCCH-based PEI payload is used to indicate 8 UE subgroups in the PO for paging, the number of code points being denoted as 2 ^N Where N is the number of bits used in the code point payload, ranging from 3 to 5, and the number of POs per PF configuration is {1,2,4}.

4. The wireless communication method of claim 2, wherein the code point is transmitted by the base station in the PDCCH-based PEI using an aggregation level AL, the AL comprising AL4 or AL8.

5. The wireless communication method according to claim 4, wherein the code points can be mapped to physical resources by frequency division multiplexing FDM or time division multiplexing TDM, and each code point is mapped to one physical resource block PRB in the physical resources.

6. The method of claim 4, wherein the mapping based on the code points indicates that the number of resources consumed by the subset of UEs for paging in the PDCCH-based PEI depends on an AL of the PDCCH-based PEI.

7. The wireless communication method of claim 1, wherein for the SSS-based PEI, a one-to-one sequence-based mapping and a common sequence-based mapping are used to indicate the subset of UEs paging at the PO.

8. The method of claim 7, wherein in the POs, a portion of the subset of UEs need to be paged, and wherein when a portion of the subset of UEs do not need to be paged, a one-to-one mapping of 8 sequences is employed for the 8 subsets of UEs.

9. The wireless communication method of claim 8, wherein physical resource mapping of 8 different sequences, wherein each sequence is associated with the subset of UEs for paging, FDMed is performed in PRBs for the entire available bandwidth for PEI transmission.

10. The wireless communication method of claim 1, wherein for the TRS/CSI-RS based PEI, orthogonal code division multiplexing, CDM, sequences of TRS/CSI-RS and combinations thereof are used to provide an indication code to indicate the subset of UEs paging at the PO.

11. The wireless communication method of claim 10, wherein the TRS/CSI-RS based PEI is a sequence-based PEI and a sequence r (m) generated for each configured TRS/CSI-RS based PEI, the UE subgroup assuming the sequence r (m) is mapped to resource elements (k, l), where k is a frequency domain physical resource map, l is a time domain physical resource map within one resource block,the sequences generated by r (m) are used to define the quantities k 'and l', orthogonal CDM sequences w of size 8 _f (k') and w _t (l ') corresponds to 8 UE subgroup indications for paging, and k ' and l ' index resource elements within CDM group.

12. The method of wireless communication according to claim 11, wherein 4 numerically orthogonal CDM groups are defined, each CDM group being 8CDM8 in size, at a target PO, only one CDM8 is used to indicate 8 UE subgroups per PO page.

13. The wireless communication method according to claim 12, wherein the first type of CDM group is CDM8-FD2-TD4, the second type of CDM group is CDM8-FD4-TD2, the third type of CDM group is CDM8-FD-TD8, and/or the fourth type of CDM group is CDM8-FD8-TD.

14. The wireless communication method of claim 12, wherein the numerical orthogonal sequences of the first type of CDM group, the second type of CDM group, the third type of CDM group, and/or the fourth type of CDM group are FDMed or TDMed, and are applied to the TRS/CSI-RS based PEI to provide an indication code of an orthogonal sequence combination indicated by the UE subgroup for paging.

15. The wireless communication method of claim 14, wherein each combination of orthogonal sequences of a first type CDM group, a second type CDM group, a third type CDM group, and/or a fourth type CDM group provides an indication code corresponding to an index J, wherein j= {0,1,2,3,4,5,6,7}, each indication code is mapped to the UE subgroup to indicate paging at the PO, and/or each indication code of each combination of orthogonal sequences of a first type CDM group, a second type CDM group, a third type CDM group, and/or a fourth type CDM group corresponding to an index J is FDMed or TDMed on physical resources.

16. A method of wireless communication performed by a base station, comprising:

configuring a physical downlink control channel, PDCCH, based on a paging early indication, PEI, mapping of PEI based on a secondary synchronization signal, SSS, and/or PEI based on a tracking reference signal, TRS, channel state information, CSI-RS, to a user equipment, UE, for indicating whether a UE subset monitors a PDCCH scrambled with a paging radio network temporary identifier, P-RNTI, at a paging occasion, PO, wherein the UE subset monitors a PO if the UE subset detects PEI, and the UE subset does not monitor the PO if the UE subset does not detect the PEI.

17. The method of claim 16, wherein for the PDCCH-based PEI, a code point-based mapping is used to indicate the subset of UEs paging at the POs, wherein a payload of a code point is based on a number of POs configured per paging frame PF.

18. The method of claim 17, wherein a plurality of code points from a PDCCH-based PEI payload are used to indicate 8 UE subgroups in the PO for paging, the number of code points being denoted as 2 ^N Where N is the number of bits used in the code point payload, ranging from 3 to 5, and the number of POs per PF configuration is {1,2,4}.

19. The method of wireless communication according to claim 17, wherein the code point is transmitted by the base station in the PDCCH-based PEI using an aggregation level AL, the AL comprising AL4 or AL8.

20. The wireless communication method according to claim 19, wherein the code points can be mapped to physical resources by frequency division multiplexing, FDM, or time division multiplexing, TDM, and each code point is mapped to one physical resource block, PRB, in the physical resources.

21. The method of claim 19, wherein the mapping based on the code points indicates that the number of resources consumed by the subset of UEs for paging in the PDCCH-based PEI is dependent on an AL of the PDCCH-based PEI.

22. The wireless communication method of claim 16, wherein for the SSS-based PEI, a one-to-one sequence-based mapping and a common sequence-based mapping are used to indicate the subset of UEs paging at the PO.

23. The method of claim 22, wherein in the POs, a portion of the subset of UEs need to be paged, and wherein when a portion of the subset of UEs do not need to be paged, a one-to-one mapping of 8 sequences is employed for the 8 subsets of UEs.

24. The method of wireless communication according to claim 23, wherein physical resource mapping of 8 different sequences, wherein each sequence is associated with the subset of UEs for paging, FDMed is performed in PRBs for the entire available bandwidth for PEI transmission.

25. The wireless communications method of claim 16, wherein for the TRS/CSI-RS based PEI, orthogonal code division multiplexing, CDM, sequences of TRS/CSI-RS and combinations thereof are used to provide an indication code to indicate the subset of UEs paging at the PO.

26. The wireless communication method of claim 25, wherein the TRS/CSI-RS based PEI is a sequence based PEI and a sequence r (m) generated for each configured TRS/CSI-RS based PEI, the UE subgroup assuming the sequence r (m) is mapped to resource elements (k, l), where k is a frequency domain physical resource map and l is a time domain physical resource map within one resource block, the sequence generated by r (m) is used to define orthogonal CDM sequences w of size 8 of quantities k' and l _f (k') and w _t (l ') corresponds to 8 UE subgroup indications for paging, and k ' and l ' index resource elements within CDM group.

27. The method of wireless communication of claim 26 wherein 4 numerically orthogonal CDM groups are defined, each CDM group having a size of 8CDM8, at a target PO, only one CDM8 is used to indicate 8 UE subgroups per PO page.

28. The wireless communication method of claim 27, wherein the first type of CDM group is CDM8-FD2-TD4, the second type of CDM group is CDM8-FD4-TD2, the third type of CDM group is CDM8-FD-TD8, and/or the fourth type of CDM group is CDM8-FD8-TD.

29. The wireless communication method of claim 27, wherein the numerical orthogonal sequences of the first type of CDM group, the second type of CDM group, the third type of CDM group, and/or the fourth type of CDM group are FDMed or TDMed, and are applied to the TRS/CSI-RS based PEI to provide an indication code of an orthogonal sequence combination indicated by the UE subgroup for paging.

30. The wireless communication method of claim 29, wherein each combination of orthogonal sequences of a first type CDM group, a second type CDM group, a third type CDM group, and/or a fourth type CDM group provides an indication code corresponding to an index J, wherein j= {0,1,2,3,4,5,6,7}, each indication code is mapped to the UE subgroup to indicate paging at the PO, and/or each indication code of each combination of orthogonal sequences of a first type CDM group, a second type CDM group, a third type CDM group, and/or a fourth type CDM group corresponding to an index J is FDMed or TDMed on physical resources.

31. A user equipment, UE, comprising:

a memory;

a transceiver; and

a processor is coupled to the memory and the transceiver;

wherein the processor is configured to perform the method of any one of claims 1 to 15.

32. A base station, comprising:

a memory;

a transceiver; and

a processor is coupled to the memory and the transceiver;

wherein the processor is configured to perform the method of any one of claims 16 to 30.

33. A non-transitory machine readable storage medium having instructions stored thereon, which when executed by a computer, cause the computer to perform the method of any of claims 1 to 30.

34. A chip, comprising:

a processor configured to invoke and run a computer program stored in a memory to cause a device on which the chip is installed to perform the method of any of claims 1 to 30.

35. A computer readable storage medium, characterized in that a computer program is stored, wherein the computer program causes a computer to perform the method according to any one of claims 1 to 30.

36. A computer program product comprising a computer program, wherein the computer program causes a computer to perform the method of any one of claims 1 to 30.

37. A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 30.