CN109952780B

CN109952780B - Method and apparatus for radio resource measurement in wireless communication system

Info

Publication number: CN109952780B
Application number: CN201880003408.0A
Authority: CN
Inventors: 亚里·加可·伊索坎加斯; 杨宁
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2017-06-14
Filing date: 2018-04-12
Publication date: 2021-02-19
Anticipated expiration: 2038-04-12
Also published as: CN109952780A; WO2018228038A1; CN112867056A

Abstract

A method and apparatus for radio resource measurement at a user equipment in a wireless communication system includes obtaining a Radio Resource Measurement (RRM) configuration, triggering a measurement based on the RRM configuration, and transmitting a measurement result to a Base Station (BS). The user equipment and the BS are configured to operate together in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for idle, inactive or suspended states.

Description

Method and apparatus for radio resource measurement in wireless communication system

Cross Reference to Related Applications

This application claims priority to U.S. provisional application No.62/519,311, filed on 14.6.2017, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to communication systems, and more particularly, to a method and apparatus for radio resource measurement in a wireless communication system.

Background

In a mobile communication network, data is transmitted via a short packet transmission session between a User Equipment (UE) and the mobile communication network. A short packet transmission session contains only hundreds of kilobytes of data. Before starting data transmission with the UE, the network needs to configure radio resources for the UE. In order to configure the required radio resources and related bearers, the network needs certain measurements from the UE to determine the cell or evolved Node B (eNB) to be used for data transmission for the UE.

However, when the UE has no data to transmit or receive, the UE may not perform measurements or perform measurements that are not suitable for the network to determine the serving cell or eNB. For example, in a long-term evolution (LTE) wireless access system, a UE is in an IDLE (IDLE) state before the UE needs to receive or transmit data. A UE in IDLE state may perform some measurements for IDLE state mobility management, such as UE autonomous cell selection and reselection. The measurement results for IDLE state mobility management are inaccurate and inapplicable to LTE wireless access systems and their networks when determining serving cells or enbs for data transmission.

When a need for data transmission arises, the network needs to configure a Radio Resource Control (RRC) connection with the UE and configure the UE to perform accurate measurement through the RRC connection. A UE typically needs to measure the cells around it for hundreds of milliseconds and send the measurement results to its serving eNB. The serving eNB can then adjust and optimize the radio bearer configuration for data transmission between the UE and the network according to these accurate measurements. In other words, there is a time delay from the data transfer needed to configure the optimized radio bearer configuration. Such time delays result in transmission delays or inefficient transmission.

Disclosure of Invention

Embodiments of the present application provide improved methods and apparatus for radio resource measurements in a wireless communication system.

The embodiments include a method for a user equipment in a wireless communication system to make radio resource measurements. The method includes obtaining a Radio Resource Measurement (RRM) configuration; triggering a measurement based on the RRM configuration; and transmitting the measurement result to a Base Station (BS). The user equipment and the BS are configured to operate together in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for the idle, inactive or suspended state.

The embodiments also include a method of a Base Station (BS) for radio resource measurement at a user equipment in a wireless communication system. The method comprises receiving an indication from a user equipment, wherein the indication indicates an RRM configuration; and receiving a result of the measurement based on the RRM configuration from the user equipment. The user equipment and the BS are configured to operate together in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for the idle, inactive or suspended state.

The embodiments also include a method of a Base Station (BS) for radio resource measurement at a user equipment in a wireless communication system. The method comprises sending an RRM configuration to the user equipment; and receiving a result of the measurement based on the RRM configuration from the user equipment. The user equipment and the BS are configured to operate together in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for the idle, inactive or suspended state.

The embodiments also include a user equipment for radio resource measurement in a wireless communication system. The user equipment comprises a memory for storing instructions and a processor configured to execute the instructions to cause the user equipment to: obtaining an RRM configuration; triggering a measurement based on the RRM configuration; and transmitting the result of the measurement to a Base Station (BS). The user equipment and the BS are configured to operate together in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for the idle, inactive or suspended state.

The embodiments also include a network apparatus for radio resource management of a user equipment in a wireless communication system. The network device includes a memory for storing instructions and a processor configured to execute the instructions to cause the network device to: receiving an indication from a user equipment, wherein the indication indicates an RRM configuration; and receiving a result of the measurement based on the RRM configuration from the user equipment. The user equipment and the network device are configured to operate together in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for the idle, inactive or suspended state.

The embodiments also include a network apparatus for radio resource management of a user equipment in a wireless communication system. The network device includes a memory for storing instructions and a processor configured to execute the instructions to cause the network device to: transmitting the RRM configuration to the user equipment; and receiving a result of the measurement based on the RRM configuration from the user equipment. The user equipment and the network device are configured to operate together in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for the idle, inactive or suspended state.

These embodiments also include a non-transitory computer-readable medium having instructions stored thereon that are executable by one or more processors of an apparatus to perform a method of radio resource management in a wireless communication system. The method includes obtaining an RRM configuration; triggering a measurement based on the RRM configuration; and transmitting the measurement result to a Base Station (BS). The apparatus and BS are configured to operate together in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for the idle, inactive or suspended state.

These embodiments also include a non-transitory computer-readable medium having instructions stored thereon that are executable by one or more processors of an apparatus to perform a method of radio resource management in a wireless communication system. The method comprises receiving an indication from a user equipment, wherein the indication indicates an RRM configuration; and receiving a result of the measurement based on the RRM configuration from the user equipment. The user equipment and the apparatus are configured to operate in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for the idle, inactive or suspended state.

These embodiments also include a non-transitory computer-readable medium having instructions stored thereon that are executable by one or more processors of an apparatus to perform a method of radio resource management in a wireless communication system. The method comprises transmitting a Radio Resource Measurement (RRM) configuration to a user equipment; and receiving a result of the measurement based on the RRM configuration from the user equipment. The user equipment and the apparatus are configured to operate together in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for the idle, inactive or suspended state.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

Fig. 1 illustrates an exemplary scenario of a wireless communication system according to some embodiments of the present application.

Fig. 2 illustrates an exemplary scenario of two wireless communication systems according to some embodiments of the present application.

Fig. 3A is an exemplary state diagram of a user equipment in a wireless communication system according to some embodiments of the present application.

Fig. 3B is an exemplary state diagram of a user equipment between two wireless communication systems according to some embodiments of the present application.

Fig. 4A is an exemplary state diagram of a base station in a wireless communication system in accordance with some embodiments of the present application.

Fig. 4B is an exemplary state diagram of a base station in two wireless communication systems in accordance with some embodiments of the present application.

Fig. 5 is a schematic diagram of an example radio resource measurement method in a connected or active state in a wireless communication system according to some embodiments of the present application.

Fig. 6 is a diagram of an example radio resource measurement method in an idle, inactive, or suspended state in a wireless communication system, in accordance with some embodiments of the present application.

Fig. 7 is a diagram of an example radio resource measurement method in an idle, inactive, or suspended state in a wireless communication system, in accordance with some embodiments of the present application.

Fig. 8 is a diagram of an example radio resource measurement method in an idle, inactive, or suspended state in a wireless communication system, in accordance with some embodiments of the present application.

Fig. 9 is a diagram of an example radio resource measurement method in an idle, inactive, or suspended state in a wireless communication system, in accordance with some embodiments of the present application.

Fig. 10 is a schematic diagram of an example radio resource measurement method in an idle, inactive or suspended state of a user equipment in a wireless communication system according to some embodiments of the present application.

Fig. 11 is a diagram of an example radio resource measurement method in an idle, inactive, or suspended state of a base station in a wireless communication system according to some embodiments of the present application.

Fig. 12 is a schematic diagram of an example user equipment for radio resource measurement in idle, inactive or suspended state in a wireless communication system, according to some embodiments of the present application.

Fig. 13 is a schematic diagram of an example network apparatus for radio resource measurement in idle, inactive, or suspended states in a wireless communication system, in accordance with some embodiments of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings, in which like numerals in different drawings represent the same or similar elements, unless otherwise specified. The implementations set forth in the following description of exemplary embodiments do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects related to the invention as set forth in the claims below.

Fig. 1 illustrates an exemplary scenario of a wireless communication system according to some embodiments of the present application. The wireless communication system includes a base station 120, a user equipment 140, and a user equipment 160. The base stations 120 are end nodes of a wireless communication network. For example, base station 120 may be an evolved node b (enb) in an LTE radio access system or a fifth generation (5G) node b (gnb) in a 5G radio access system. The base station 120 transmits radio signals carrying system information of the wireless communication system. User equipment within a New Radio (NR) coverage area 180 around the base station 120 receives the system information. For example, the user equipment 140 within the NR coverage 180 receives the system information and can access network services through the base station 120.

Each of the user equipments 140 and 160 is a mobile terminal in a wireless communication network. For example, the user device 140 or 160 may be a smart phone, a network interface card, or a machine type terminal. As another example, the user equipment 140 or 160 may be a user equipment in an LTE wireless access system or a 5G wireless access system. Each of the user equipments 140 and 160 and the base station 120 comprises a communication unit capable of transmitting and receiving radio signals. The following description discusses aspects of operating the user equipment 140 in a wireless communication system, it being understood that such description also applies to the user equipment 160.

When the user equipment 140 intends to access network services through the base station 120, the user equipment 140 needs to receive a control signal from the base station 120 to collect system information such as synchronization and radio resource allocation and scheduling within the NR coverage area 180. For example, the user equipment 140 in the 5G wireless access system needs to receive the PDCCH to know whether data in the physical downlink shared channel is transmitted to the user equipment 140. Therefore, the user equipment 140 needs to detect the PDCCH in the signal transmitted by the base station 120.

For example, a 5G wireless access system uses OFDM waveforms for wireless communication. As in existing LTE wireless access systems, communications are measured in time frames, each frame being divided into time slots, each time slot containing a plurality of OFDM symbols, each OFDM symbol spanning a plurality of frequency subcarriers. Resources are defined in terms of time (OFDM symbols) and frequency (subcarriers).

Fig. 2 illustrates an exemplary scenario of two wireless communication systems according to some embodiments of the present application. As shown in fig. 2, the user equipment 140 may be within the coverage of two wireless communication systems. For example, the base station 120 is a gNB of a 5G radio access system, and the NR coverage 180 of the base station 120 is a range of the 5G radio access system. In another aspect, base station 122 is an eNB of an LTE wireless Access system, and Evolved Universal Terrestrial Radio Access (E-UTRA) coverage 185 of base station 122 is a range of the LTE wireless Access system. The user equipment 140 is in a position accessible to both the 5G radio access system and the LTE radio access system.

Fig. 3A is an exemplary state diagram of a user equipment in a wireless communication system according to some embodiments of the present application. When the user equipment is in the wireless communication system, its RRC state may include an idle state, an inactive state, and a connected state.

For example, as shown in fig. 3A, the user equipment 140 in the 5G system may be in an NR RRC idle 320(NR RRC IDLE 320) state, an NR RRC inactive 340(NR RRC INACTIVE 340) state, or an NR RRC CONNECTED 360(NR RRC CONNECTED 360) state. The user device 140 initially operates in NR RRC IDLE 320 state. When the user equipment 140 needs to transmit or receive data through the 5G radio access system, the base station 120 establishes an RRC connection between the user equipment 140 and the base station 120. The user equipment 140 enters the NR RRC CONNECTED 360 state after establishing the RRC connection. After the user equipment 140 transmits or receives data, the user equipment 140 releases the RRC connection and returns to NR RRC IDLE 320 state.

In some embodiments, the user equipment 140 may deactivate the RRC connection and enter NR RRC INACTIVE 340 state. When the user equipment 140 needs to transmit or receive data again, the user equipment 140 may re-enter the NR RRC CONNECTED 360 state and transmit or receive data through the base station 120. When the user equipment 140 is in NR RRC INACTIVE 340 state and there is no need to resume the inactive RRC connection, the user equipment 140 optionally returns to NR RRC IDLE 320 state. The user equipment 140 may not store information related to the previous RRC connection after it returns to NR RRC IDLE 320 state.

Fig. 3B is an exemplary state diagram of a user equipment between two wireless communication systems according to some embodiments of the present application. When the user equipment is in a position where it can access two wireless communication systems, the RRC state of the user equipment in the first wireless communication system may include an idle state, an inactive state, and a connected state, and the RRC state of the user equipment in the second wireless communication system may include an idle state and a connected state.

For example, as shown in fig. 3B, the user equipment 140 in the 5G system may be in NR RRC IDLE 320 state, NR RRC INACTIVE 340 state, or NR RRC CONNECTED 360 state. The user device 140 operates between these states as described above with reference to fig. 3A. In another aspect, the user equipment 140 in the E-UTRA system may be in an E-UTRA RRC Idle 310(E-UTRA RRC IDLE 310) state or an E-UTRA RRC CONNECTED 350(E-UTRA RRC CONNECTED 350) state. The user equipment 140 within E-UTRA coverage initially operates in the E-UTRA RRC IDLE 310 state. When the user equipment 140 needs to transmit or receive data through the LTE radio access system, the base station 122 establishes an RRC connection between the user equipment 140 and the LTE base station. After establishing the RRC connection, the user equipment 140 enters the E-UTRA RRC CONNECTED 350 state. After the user equipment 140 sends or receives data, the user equipment 140 releases the RRC connection and returns to the E-UTRA RRC IDLE 310 state.

In some embodiments, the user equipment 140 may change its connection, i.e., the handover procedure, between the two wireless communication systems. For example, as shown in fig. 3B, when the user equipment 140 is in the NR RRC CONNECTED 360 state and meets a criterion, the user equipment 140 may change its connection from the 5G radio access system to the LTE radio access system. The user equipment 140 leaves the NR RRC CONNECTED 360 state and enters the E-UTRA RRC CONNECTED 350 state. The standard includes, for example, that the received radio signal of the LTE wireless access system is better than the received radio signal of the 5G wireless access system. Alternatively, the user equipment 140 may change its connection from the LTE radio access system to the 5G radio access system. Thus, the user equipment 140 leaves the E-UTRA RRC CONNECTED 350 state and enters the NR RRC CONNECTED 360 state.

In some embodiments, when the user equipment does not have an RRC connection, the user equipment changes between the two wireless communication systems, i.e., a reselection procedure. For example, as shown in fig. 3B, when the user equipment 140 is in the NR RRC IDLE 320 state and meets a criterion, the user equipment 140 may change from a 5G radio access system to an LTE radio access system. The user equipment 140 leaves NR RRC IDLE 320 state and enters E-UTRA RRC IDLE 310 state. The standard includes, for example, the user equipment 140 receiving a signal from the 5G radio access system with a signal strength below a threshold and another signal from the LTE radio access system with a signal strength higher than the signal received from the 5G radio access system.

As another example, as shown in fig. 3B, when the user equipment 140 is in NR RRC INACTIVE 340 state and meets a criterion, the user equipment 140 may change from a 5G radio access system to an LTE radio access system. The user equipment 140 leaves NR RRC INACTIVE 340 state and enters E-UTRA RRC IDLE 310 state. The standard includes, for example, the user equipment 140 receiving a signal from the 5G radio access system with a signal strength below a threshold and another signal from the LTE radio access system with a signal strength higher than the signal received from the 5G radio access system.

Fig. 4A is an exemplary state diagram of a base station in a wireless communication system in accordance with some embodiments of the present application. The RRC state of the base station may include an idle state, an inactive state, and a connected state when the user equipment is in the wireless communication system.

For example, as shown in fig. 4A, a base station 120 in a 5G system may be in an NR RRC idle 420(NR RRC IDLE 420) state, an NR RRC inactive 440(NR RRC INACTIVE 440) state, or an NR RRC CONNECTED 460(NR RRC CONNECTED 460) state. The base station 120 may not have an NR RRC state corresponding to the user equipment 140 until the user equipment 140 requires an RRC connection. After the user equipment 140 requires an RRC connection, the base station 120 enters NR RRC IDLE state and starts establishing an RRC connection between the user equipment 140 and the base station 120. The base station 120 enters the NR RRC CONNECTED 460 state after establishing the RRC connection. After the user equipment 140 transmits or receives data, the base station 120 releases the RRC connection and returns to the NR RRC IDLE 420 state.

In some embodiments, the base station 120 may deactivate the RRC connection and enter NR RRC INACTIVE 440 state. When the user equipment 140 needs to transmit or receive data again, the base station 120 may re-enter the NR RRC CONNECTED 460 state and receive data from the user equipment 140 or transmit data to the user equipment 140. When the base station 120 is in the NR RRC INACTIVE state and there is no need to resume the inactive RRC connection, the base station 120 optionally returns to the NR RRC IDLE state. After the base station 120 returns NR RRC IDLE 420 state, the base station 120 may not store information about the previous RRC connection.

Fig. 4B is an exemplary state diagram of a base station in two wireless communication systems in accordance with some embodiments of the present application. When the user equipment is in a position where it can access two wireless communication systems, the RRC states of the base station in the first wireless communication system may include an idle state, an inactive state, and a connected state, and the RRC state of another base station in the second wireless communication system may include an idle state and a connected state.

For example, as shown in fig. 4B, the base station 120 in the 5G system may be in NR RRC IDLE 420 state, NR RRC INACTIVE 440 state, or NR RRC CONNECTED 460 state. The base station 120 operates between these states as described above with reference to fig. 4A. In another aspect, a base station 122 in an E-UTRA system may be in an E-UTRA RRC IDLE 410(E-UTRA RRC IDLE 410) state or an E-UTRA RRC CONNECTED 450(E-UTRA RRC CONNECTED 450) state. The base station 122 may not have any E-UTRA RRC state corresponding to the user equipment 140 until the user equipment 140 requires an RRC connection in the E-UTRA system. After the user equipment 140 requires an RRC connection, the base station enters the E-UTRA RRC IDLE 410 state and starts establishing an RRC connection between the user equipment 140 and the base station. After establishing the RRC connection, the base station enters the E-UTRARRC CONNECTED 450 state. After the user equipment 140 sends or receives data, the base station releases the RRC connection and returns to the E-UTRA RRC IDLE 410 state.

In some embodiments, when the user equipment has an RRC connection, the user equipment may change its connection between the two wireless communication systems, i.e., a handover procedure. For example, as shown in fig. 4B, when the base station 120 is in the NR RRC CONNECTED 460 state and meets a criterion, the user equipment 140 changes its connection from the 5G radio access system to the LTE radio access system. Base station 120 leaves the NR RRC CONNECTED 460 state and enters NR RRC IDLE 420 state. On the other hand, when the user equipment 140 changes to change its connection to an E-UTRA network, the base station 122 starts a handover procedure and enters an E-UTRA RRC CONNECTED 450 state. The standard includes, for example, that the signal strength of a radio signal received from the LTE wireless access system is higher than the signal strength of a signal received from the 5G wireless access system.

Alternatively, the user equipment 140 may change its connection from the LTE radio access system to the 5G radio access system. Thus, the base station 122 leaves the E-UTRA RRC CONNECTED 450 state and enters the E-UTRA RRC IDLE 410 state. On the other hand, when the user equipment 140 changes its RRC connection to the 5G wireless network, the base station 120 starts a handover procedure and enters an NR RRC CONNECTED 460 state.

In some embodiments, when the user equipment does not have an RRC connection with base station 120 or base station 122, the user equipment may change, i.e., a reselection procedure, between the two wireless communication systems. For example, as shown in fig. 4B, when the base station 120 is in the NR RRC idle 420 state and meets a criterion, the user equipment 140 may change from the 5G radio access system to the LTE radio access system. The base station 120 may enter NR RRC IDLE 420 state or may not retain any information regarding the previous RRC connection. When the user equipment changes to the LTE radio access system, the base station 122 enters the E-UTRA RRC IDLE 410 state when the user equipment 140 enters the E-UTRA IDLE 310 state shown in FIG. 3B. The standard includes, for example, the user equipment 140 receiving a signal from the 5G radio access system with a signal strength below a threshold and another signal from the LTE radio access system with a signal strength higher than the signal received from the 5G radio access system. Alternatively, as shown in fig. 4B, the user equipment 140 may change from the LTE radio access system to the 5G radio access system through a similar reselection procedure. Base station 122 and base station 120 change their states in a similar manner.

As another example, as shown in fig. 4B, when the base station 120 is in NR RRC INACTIVE 440 state and meets a criterion, the user equipment 140 may change from a 5G radio access system to an LTE radio access system. The base station 120 may enter NR RRC IDLE 420 state or may not retain any information regarding the previous RRC connection. When the user equipment 140 enters the E-UTRA IDLE 310 state shown in fig. 3B, the base station 122 enters the E-UTRA RRC IDLE 410 state. The standard includes, for example, the user equipment 140 receiving a signal from the 5G radio access system with a signal strength below a threshold and another signal from the LTE radio access system with a signal strength higher than the signal received from the 5G radio access system.

Advanced wireless communication technologies can increase the utilization of frequency bandwidth and transmission data rates. For example, Carrier Aggregation (CA) techniques may simultaneously utilize one or more channel bandwidths according to respective channel conditions. Dual Connection (DC) technology may provide two connections to one or more wireless communication systems and improve control signal and/or data transmission over the two connections. Beamforming (BF) transmission techniques may improve transmission efficiency through spatial filtering. These advanced techniques require timely and accurate measurements of the channel state, especially when the user equipment and the base station change from IDLE or INACTIVE state to CONNECTED state.

The methods disclosed herein for radio resource measurement in IDLE or INACTIVE states enhance such advanced transmission techniques, including CA, DC, and BF transmissions. These methods activate measurements as early as possible to obtain accurate measurement results and avoid unnecessary measurements before data transmission

Fig. 5 is a schematic diagram of an example radio resource measurement method in a connected or active state in a wireless communication system according to some embodiments of the present application. As shown in fig. 5, the base station 120 sends an RRM configuration 520 to the user equipment 140. The RRM configuration 520 is used for IDLE, inactive, or suspended states, such as NR RRC IDLE 320, NR RRC INACTIVE 340, E-UTRA RRC IDLE 310, NR RRC IDLE 420, NR RRC INACTIVE 440, or E-UTRA RRC IDLE 410 in FIGS. 3A, 3B, 4A, or 4B.

RRM configuration 520 and other RRM configurations within the scope of the methods disclosed herein may include, for example, one or more of the following: auxiliary Synchronization Signal or Physical Broadcast Channel Reference Signal Received Power (SS), Synchronization Signal/PBCH-RSRP, Channel state Indicator Reference Signal Received Power (CSI-RSRP), auxiliary Synchronization, Signal transmitted Power, Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Universal Terrestrial Radio Access (UTRA), Universal Terrestrial Radio Access (FDD), Frequency Division Duplex (FDD), Common Pilot Channel (CPICH), Common Pilot Channel encoded Power (RSCP), Received Signal Strength Indicator (RSSI), Received Signal Strength Indicator (CPICH), Common Pilot Channel (RSCP), Common Pilot Channel (CPICH), Common Pilot Channel (Common Pilot Channel), Common Pilot Channel (FDD) and Common Pilot Channel (CPICH) communication System, UTRA Time Division Duplex (TDD) main Common Control Physical Channel (P-CCPCH), CDMA2000 Single carrier radio transmission technology (1x RTT) pilot strength, CDMA2000 High Rate Packet Data (HRPD) pilot strength, Reference Signal Time Difference (RSTD), Reference signal Time difference (GNSS), timing of UE Global Navigation Satellite System (GNSS) cell frames for UE positioning, UE GNSS code measurement, UE GNSS carrier phase measurement, UE receive-transmit (Rx-Tx) Time difference, IEEE 802.11 Wireless Local Area Network (WLAN, Wireless Local Area Network) Received Signal Strength Indication (RSSI), Multimedia Broadcast multicast service Network (MBSFN), Multimedia Broadcast Single Frequency Network (MBSFN), and Reference signal q received signal (q) Reference signal, Multicast Channel Block Error Rate (MCH BLER), Channel State Indicator (CSI) Reference Signal Received Power (CSI-RSRP), side-link Reference Signal Received Power (S-RSRP), side-link discovery Reference Signal Received Power (SD-RSRP), Reference Signal-to-noise and interference ratio (RS-SINR), Received Signal Strength Indicator (RSSI), System Frame Number (SFN, System Frame Number) and sub-Frame timing difference (SCH), narrow-band Reference Signal Received Power (NRSRP, narrow-band Reference Signal Received Power), narrow-band Reference Signal Received Quality (NRSRQ, narrow-band Reference Signal Received Quality (SCH), side-link Received Signal Strength Indicator (S-Signal Received, Signal Received Power), side-link shared Channel (physical shared Channel), physical Sidelink Shared Channel) reference signal received power (PSSCH-RSRP), Channel Busy Ratio (CBR), or Channel occupancy ratio (CR).

The user equipment 140 in idle, inactive or suspended state may trigger measurements based on RRM configuration. For example, when the user equipment 140 has data to transmit, the user equipment 140 triggers the measurements 540 based on the RRM configuration 520. Alternatively, base stations 120 in an idle, inactive, or suspended state may trigger measurements based on RRM configuration. For example, as shown in fig. 5, when there is data for the user equipment 140 to receive, the base station 120 triggers measurements 540 based on the RRM configuration 520.

After triggering the measurement 540, the user equipment 140 performs the measurement 560. For example, the user equipment 140 measures all possible frequencies available for CA or DC and collects RRM results separately. The user equipment 140 then sends the collected RRM results 580 to the base station 120.

Fig. 6 is a diagram of an example radio resource measurement method in an idle, inactive, or suspended state in a wireless communication system, in accordance with some embodiments of the present application. As shown in fig. 6, the base station 120 and the user equipment 140 have used the RRM configuration 620 in the previous measurements or at least have a stored RRM configuration 620. The base station 120 and the user equipment 140 implicitly determine the RRM configuration 620 as a default RRM configuration without further signaling therebetween. The RRM configuration 620 may be used in IDLE, inactive, or suspended states, such as NR RRC IDLE 320, NR RRC INACTIVE 340, E-UTRA RRC IDLE 310, NR RRC IDLE 420, NR RRC INACTIVE 440, or E-UTRA RRC IDLE 410 in fig. 3A, 3B, 4A, or 4B. Alternatively, the RRM configuration 620 may be used for the CONNECTED or activated state, such as NR RRC CONNECTED 360, E-UTRA RRC CONNECTED 350, NR RRC CONNECTED 460, or E-UTRA RRC CONNECTED 450 in fig. 3A, 3B, 4A, or 4B.

The user equipment 140 in idle, inactive or suspended state may trigger measurements based on RRM configuration. For example, when the user equipment 140 is to transmit data, the user equipment 140 triggers the measurements 640 based on the RRM configuration 620.

After triggering the measurement 640, the user equipment 140 performs the measurement 660. For example, the user equipment 140 measures all possible frequencies available for CA or DC and collects RRM results separately. The user equipment 140 then sends the collected RRM results 680 to the base station 120.

Fig. 7 is a diagram of an example radio resource measurement method in an idle, inactive, or suspended state in a wireless communication system, in accordance with some embodiments of the present application. The user equipment 140 determines the RRM configuration 720 for the idle, inactive or suspended state from the RRM configuration used in the previous idle, inactive or suspended state. For example, the user device 140 may obtain the RRM configuration by determining the RRM configuration from a previous RRM configuration used in a previous idle, inactive, or suspended state before the user device 140 enters the current idle, inactive, or suspended state. In other words, the user device 140 may reuse the previous RRM configuration used in the previous NR RRC IDLE 320 or inactivity 340 state to make measurements in the current NR RRC IDLE 320 or inactivity 340 state.

As another example, the user device 140 may determine the RRM configuration from the RRM configuration used in the previous connected or active state before the user device 140 enters the current idle, inactive or suspended state. In other words, the user equipment 140 may use the previous RRM configuration used in the NR RRC CONNECTED 360 state to make measurements in the current NR RRC IDLE 320 or INACTIVE 340 state.

In some embodiments, the user equipment 140 may determine the RRM configuration from a service configuration used in a previously connected or active state before the user equipment 140 enters a current idle, inactive or suspended state. For example, the user equipment 140 determines the RRM configuration according to whether the service configuration is a short packet transmission. If the service configuration is a short packet transmission, the user equipment 140 may use the RRM configuration used during the previous short packet transmission. If the service configuration is not a short packet transmission, the user equipment 140 may reuse the previous RRM configuration used in the NR IDLE 320 or INACTIVE 340 state.

The user equipment 140 may also determine the RRM configuration according to the network environment. For example, the user equipment 140 determines the RRM configuration according to the network topology in which the user equipment 140 is located. When the user equipment 140 is located in a location surrounded by more than 10 frequencies of 5G and/or LTE frequencies of the wireless communication system, the user equipment 140 may determine the RRM configuration used in the previous NR RRC CONNECTED 360 state as the RRM configuration for the current NR RRC IDLE 320 or INACTIVE 340 state. When the user device 140 is located in a location surrounded by more than 10 5G frequencies and/or LTE frequencies of the wireless communication system, the user device 140 may determine the RRM configuration used in the previous NR RRC IDLE 320 state as the RRM configuration for the current NR RRC IDLE 320 or INACTIVE 340 state.

Alternatively, the user equipment 140 determines the RRM configuration according to the speed of the user equipment 140. For example, the user equipment 140 determines the RRM configuration according to whether the user equipment 140 is moving at a speed of more than 50 kilometers per hour. When the user device 140 moves at a velocity in excess of 50 kilometers per hour, the user device 140 may determine the RRM configuration used in the previous NR RRC CONNECTED 360 state as the RRM configuration for the current NR RRC IDLE 320 or INACTIVE 340 state. When the user device 140 is moving at a speed of less than 3 kilometers per hour, the user device 140 may determine the RRM configuration used in the previous NR RRC IDLE 320 state as the RRM configuration for the current NR RRC IDLE 320 0 or INACTIVE 340 state.

After the RRM configuration determination 720, the user equipment 140 sends an indication 730 to the base station 120 before the user equipment 140 leaves the connected or active state. For example, the user equipment 140 sends the determined configuration index of the RRM configuration to the base station 120 before the user equipment 140 leaves the NR RRC CONNECTED 360 state.

After indicating the RRM configuration 730, the user equipment 140 in the idle, inactive or suspended state may trigger measurements based on the RRM configuration. For example, when the user equipment 140 has data to transmit, the user equipment 140 triggers the measurement 740 based on the RRM configuration determination 720.

After triggering the measurement 740, the user equipment 140 performs the measurement 760. For example, the user equipment 140 measures all possible frequencies available for CA or DC and collects RRM results separately. The user equipment 140 then sends the collected RRM results 780 to the base station 120.

Fig. 8 is a diagram of an example radio resource measurement method in an idle, inactive, or suspended state in a wireless communication system, in accordance with some embodiments of the present application. The user equipment 140 may obtain the RRM configuration by receiving a configuration index for a set of RRM configurations in a paging message, a random access response message, or a system information message from the base station 120. The configuration index indicates one of the set of RRM configurations as the RRM configuration.

For example, as shown in fig. 8, the base station 120 transmits the configuration index to the user equipment 140 in a paging message 821, a random access response message 822, or a system information message 823. After receiving the configuration index, the user equipment 140 may determine one of a set of RRM configurations as the RRM configuration for which the user equipment 140 is measuring in NR RRC IDLE 320 or INACTIVE 340 state.

The user equipment 140 in idle, inactive or suspended state may trigger measurements based on RRM configuration. For example, when the user equipment 140 has data to transmit, the user equipment 140 triggers the measurements 840 based on the determined RRM configuration.

After triggering the measurement 840, the user equipment 140 performs the measurement 860. For example, the user equipment 140 measures all possible frequencies available for CA or DC and collects RRM results separately. The user equipment 140 then sends the collected RRM results 880 to the base station 120.

Fig. 9 is a diagram of an example radio resource measurement method in an idle, inactive, or suspended state in a wireless communication system, in accordance with some embodiments of the present application. The base station 120 may determine the RRM configuration 920 and send an indication 930 of the RRM configuration to the user equipment 140 in a paging message, a random access response message, or a system information message.

After receiving the indication 930 of the RRM configuration, the user equipment 140 in the idle, inactive or suspended state may trigger measurements based on the indicated RRM configuration. For example, when the user equipment 140 has data to transmit, the user equipment 140 triggers the measurements 940 based on the indicated RRM configuration.

After triggering the measurement 940, the user equipment 140 performs the measurement 960. For example, the user equipment 140 measures all possible frequencies available for CA or DC and collects RRM results separately. The user equipment 140 then sends the collected RRM results 980 to the base station 120.

In some embodiments, the user equipment 140 triggers RRM measurements based on the RRM configuration when: when receiving data to be transmitted in a buffer of the user equipment 140; after transmitting a Random Access Channel (RACH) message; or after sending the connection request. The connection request includes an establishment cause indicating that the user equipment 140 has data to send.

For example, in the above-described measurement triggers 540, 640, 740, 840, and 940, when the user equipment 140 receives data to be transmitted in a transmission queue from an application, the user equipment 140 triggers RRM measurement. As another example, in the above-described measurement triggers 540, 640, 740, 840, and 940, the user equipment 140 triggers RRM measurement after transmitting the random access preamble to the base station 120. The user equipment 140 may prepare to transmit or receive data after completing the random access procedure. Alternatively, in the above-described measurement triggers 540, 640, 740, 840 and 940, the user equipment 140 triggers RRM measurement after sending the service request to the base station 120. After the base station 120 receives the service request, the base station 120 needs the measurement result from the user equipment 140 in order to allocate the radio resource and transmission scheme for the user equipment 140.

Alternatively, when the user equipment 140 receives one of the paging message, the random access response message and the system information message including the activation indication, the user equipment 140 triggers RRM measurement based on the RRM configuration. For example, as shown in fig. 8, when the user equipment 140 receives one of the paging message 821, the random access response message 822, or the system information message 823 including the activation indication from the base station 120, the user equipment 140 triggers the measurement 540, 640, 740, 840, or 940 based on the determined RRM configuration.

Fig. 10 is a diagram of an example radio resource measurement method 1000 in an idle, inactive, or suspended state for a user equipment in a wireless communication system, in accordance with some embodiments of the present application. The method 1000 may be implemented by the user equipment 140 or 160. The method 1000 includes obtaining RRM configuration (step 1020), triggering measurements based on the RRM configuration (step 1040), measuring radio resources (step 1060), and transmitting the results of the measurements to the base station (step 1080).

Step 1020 includes obtaining the RRM configuration. For example, as shown in fig. 5, the user equipment 140 receives the RRM configuration 520 transmitted by the base station 120. The RRM configuration 520 is used for IDLE, inactive, or suspended states, such as NR RRC IDLE 320, NR RRC INACTIVE 340, E-UTRA RRC IDLE 310, NR RRC IDLE 420, NR RRC INACTIVE 440, or E-UTRA RRC IDLE 410 in FIGS. 3A, 3B, 4A, or 4B.

Step 1040 includes triggering measurements based on the RRM configuration. For example, as shown in fig. 5, when the user equipment 140 has data to transmit, the user equipment 140 triggers a measurement 540 based on the RRM configuration 520.

Step 1060 includes measuring radio resources. For example, as shown in fig. 5, the user equipment 140 measures all possible frequencies available for CA or DC and collects RRM results separately.

Step 1080 includes sending the measurement results to the base station. For example, as shown in fig. 5, the user equipment 140 sends the collected RRM results 580 to the base station 120.

The method 1000 may also include sending an indication to the BS before the user equipment leaves the connected or active state. The indication indicates the RRM configuration of the plurality of RRM configurations. For example, as shown in fig. 7, after determining the RRM configuration 720, the user device 140 may send an indication 730 to the base station 120 before the user device 140 leaves the connected or active state. For example, the user equipment 140 sends the determined configuration index of the RRM configuration to the base station 120 before the user equipment 140 leaves the NR RRC CONNECTED 360 state. The user equipment 140 in the NR RRC CONNECTED 360 state sends the configuration index of the determined RRM configuration to the base station 120 before leaving the NR RRC CONNECTED 360 state. The configuration index may indicate, for example, a third of the ten RRM configurations as the determined RRM configuration.

In some embodiments, step 1020 may comprise obtaining the RRM configuration by determining the RRM configuration from the RRM configurations used in the previous idle, inactive or suspended state before the user device 140 enters the current idle, inactive or suspended state. For example, as shown in fig. 6, the base station 120 and the user equipment 140 have used the RRM configuration 620 in the previous measurements, or at least have both stored RRM configurations 620. The base station 120 and the user equipment 140 implicitly determine the RRM configuration 620 as a default RRM configuration without further signaling between them. The RRM configuration 620 may be used in IDLE, inactive, or suspended states, such as NR RRC IDLE 320, NR RRC INACTIVE 340, E-UTRA RRC IDLE 310, NR RRC IDLE 420, NR RRC INACTIVE 440, or E-UTRA RRC IDLE 410 in fig. 3A, 3B, 4A, or 4B. The user device 140 determines the RRM configuration from a previous RRM configuration used in a previous NR RRC IDLE 320 0, INACTIVE 340 state before the user device 140 entered the current NR RRC IDLE 320 or INACTIVE 340 state.

In some embodiments, step 1020 comprises obtaining the RRM configuration by determining the RRM configuration from the RRM configurations used in the previous connected or active state before the user equipment enters the current idle, inactive or suspended state. For example, as shown in fig. 7, the user equipment 140 may determine to use a previous RRM configuration in the NR RRC CONNECTED 360 state to make measurements in the current NR RRC IDLE 320 or INACTIVE 340 state.

In some embodiments, step 1020 comprises obtaining the RRM configuration by determining the RRM configuration from a service configuration used in a previously connected or active state before the user equipment enters a current idle, inactive or suspended state. For example, the user equipment 140 determines the RRM configuration according to whether the service configuration is a short packet transmission. If the service configuration is a short packet transmission, the user equipment 140 may determine to use the RRM configuration used during the previous short packet transmission. If the service configuration is not a short packet transmission, the user equipment 140 may determine to reuse the previous RRM configuration used in the NR IDLE 320 or INACTIVE 340 state.

In some embodiments, step 1020 comprises obtaining the RRM configuration by determining the RRM configuration from the network environment. For example, the user device 140 may determine the RRM configuration according to a network topology in which the user device 140 is located. For example, when the user equipment 140 is located in a location surrounded by more than 10 frequencies of 5G and/or LTE frequencies of the wireless communication system, the user equipment 140 may determine the RRM configuration used in the previous NR RRC CONNECTED 360 state as the RRM configuration for the current NR RRC IDLE 320 or INACTIVE 340 state. When the user device 140 is located in a position surrounded by more than 10 5G frequencies and/or LTE frequencies of the wireless communication system, the user device 140 may determine the RRM configuration used in the previous NR RRC IDLE 320 state as the RRM configuration of the current NR RRC IDLE 320 or INACTIVE 340 state.

In some embodiments, step 1020 may comprise obtaining the RRM configuration by determining the RRM configuration from a velocity of the user equipment. For example, the user equipment 140 determines the RRM configuration according to whether the user equipment 140 is moving at a speed of more than 50 kilometers per hour. When the user device 140 moves at a velocity in excess of 50 kilometers per hour, the user device 140 may determine the RRM configuration used in the previous NR RRC CONNECTED 360 state as the RRM configuration for the current NR RRC IDLE 320 or INACTIVE 340 state. When the user device 140 is moving at a speed of less than 3 kilometers per hour, the user device 140 may determine the RRM configuration used in the previous NR RRC IDLE 320 state as the RRM configuration for the current NR RRC IDLE 320 0 or INACTIVE 340 state.

In some embodiments, step 1020 may comprise obtaining the RRM configuration by receiving a configuration index for a set of RRM configurations in a paging message, a random access response message, or a system information message from the BS. The configuration index indicates one of the set of RRM configurations as the RRM configuration. For example, as shown in fig. 8, the user equipment 140 receives the configuration index in the paging message 821, the random access response message 822, or the system information message 823 from the base station 120. After receiving the configuration index, the user device 140 may determine that one of the set of RRM configurations is configured as the RRM configuration for the user device 140 to measure in NR RRC IDLE 320 or INACTIVE 340 state.

In some embodiments, step 1040 may include triggering a measurement if: when receiving data to be transmitted in a buffer of the user equipment, after transmitting the RACH message, or after transmitting a connection request. The connection request includes an establishment cause indicating that the user equipment has data to send. For example, the user equipment 140 triggers a measurement when receiving data to be transmitted in a transmission queue of the user equipment 140. As another example, the user equipment 140 may trigger the measurement after sending the RACH preamble to the base station 120. As another example, the user equipment 140 may trigger the measurement after sending the connection request to the base station 120. The connection request includes an establishment cause indicating that the user equipment 140 has data to send.

In some embodiments, step 1040 may include receiving one of a paging message, a random access response message, or a system information message including an activation indication, and triggering measurements based on the RRM configuration. For example, as shown in fig. 8, after the user equipment 140 receives the paging message 821, the random access response message 822, or the system information message 823 including the activation indication, the user equipment 140 triggers the measurement 840 based on the determined RRM configuration.

Fig. 11 is a diagram of an example radio resource measurement method 1100 in an idle, inactive, or suspended state of a base station in a wireless communication system, in accordance with some embodiments of the present application. Method 1100 may be implemented by base station 120. Method 1100 includes transmitting an RRM configuration to a user equipment (step 1120), triggering a measurement based on the RRM configuration (step 1140), and receiving a result of the measurement based on the RRM configuration from the user equipment (step 1160). The user equipment and the base station BS are configured to operate together in one of the states comprising: idle, inactive or suspended state, and connected or active state. The RRM is configured for idle, inactive or suspended states.

Step 1120 comprises transmitting the RRM configuration to the user equipment. For example, as shown in fig. 5, the base station 120 transmits the RRM configuration 520 to the user equipment 140. The RRM configuration 520 is used for IDLE, inactive, or suspended states, such as NR RRC IDLE 320, NR RRC INACTIVE 340, E-UTRA RRC IDLE 310, NR RRC IDLE 420, NR RRC INACTIVE 440, or E-UTRA RRC IDLE 410 in FIGS. 3A, 3B, 4A, or 4B.

Step 1140 includes triggering measurements based on the RRM configuration. The base station 120 in an idle, inactive, or suspended state may trigger measurements based on RRM configuration. For example, as shown in fig. 5, when the user equipment 140 has data to receive, the base station 120 triggers measurements 540 based on the RRM configuration 520.

Step 1160 comprises receiving a result of the RRM configuration based measurement from the user equipment. For example, as shown in fig. 5, after the user equipment 140 measures all possible frequencies and collects the RRM results 580, the base station 120 receives the RRM results 580 from the user equipment 140.

In some embodiments, step 1140 may comprise triggering measurements based on the RRM configuration after receiving data to be transmitted in a buffer of the BS, after receiving a RACH message, or after receiving a connection request from the user equipment. The connection request includes an establishment cause indicating that the user equipment has data to send.

For example, in the measurement triggers 540, 640, 740, 840, and 940, when the base station 120 receives data to be transmitted in a transmission queue from a 5G or E-UTRA network system, the base station 120 triggers RRM measurement. As another example, in the above-described measurement triggers 540, 640, 740, 840, and 940, the base station 120 triggers RRM measurement after receiving the random access preamble from the user equipment 140. Alternatively, in the above-described measurement triggers 540, 640, 740, 840, and 940, the base station 120 triggers RRM measurement after transmitting the connection request to the user equipment 140. After the base station 120 transmits the connection request, the base station 120 needs the measurement result from the user equipment 140 to allocate radio resources and transmission schemes for connecting with the user equipment 140.

In some embodiments, step 1140 may comprise sending one of a paging message, a random access response message, or a system information message comprising an activation indication to the user equipment. For example, as shown in fig. 8, the base station 120 sends one of a paging message 821, a random access response message 822, or a system information message 823 including an activation indication to the user equipment 140 to trigger the measurement 840.

In some embodiments, step 1120 includes transmitting a configuration index for a set of RRM configurations to the user equipment in a paging message, a random access response message, or a system information message. The configuration index indicates one of the set of RRM configurations as the RRM configuration. For example, as shown in fig. 8, the base station 120 transmits the configuration index in the paging message 821, the random access response message 822, or the system information message 823 to the user equipment 140. After the user equipment 140 receives the configuration index, the user equipment 140 may determine one of a set of RRM configurations as the RRM configuration for the user equipment 140 to measure in NR RRC IDLE 320 or the INACTIVE 340 state.

In some embodiments, the method 1100 may include determining the RRM configuration from a previous RRM configuration used in a previous idle, inactive or suspended state before the user equipment entered the current idle, inactive or suspended state. For example, as shown in fig. 9, the base station 120 determines to use the previous RRM configuration in the NR RRC CONNECTED 460 state to make measurements in the current NR RRC IDLE 420 or INACTIVE 440 state. After the RRM configuration determination 920, the base station 120 sends an indication 930 of the RRM configuration to the user equipment 140.

In some embodiments, the method 1100 may include determining the RRM configuration from the RRM configuration used in the previously connected or active state before the user equipment enters the current idle, inactive or suspended state. For example, as shown in fig. 9, the base station 120 may determine to use the previous RRM configuration in the NR RRC CONNECTED 460 state to make measurements in the current NR RRC IDLE 420 or INACTIVE 440 state.

In some embodiments, the method 1100 may include determining the RRM configuration from a service configuration used in a previously connected or active state before the user equipment enters a current idle, inactive or suspended state. For example, the base station 120 determines the RRM configuration according to whether the service configuration is a short packet transmission. If the service configuration is a short packet transmission, the base station 120 may determine to use the RRM configuration used during the previous short packet transmission. If the service configuration is not a short packet transmission, the base station 120 may determine to reuse the previous RRM configuration used in the NR IDLE 420 or INACTIVE 440 state.

In some embodiments, method 1100 may include determining the RRM configuration based on the network environment. For example, the base station 120 may determine the RRM configuration according to the network topology in which the base station 120 is located. For example, when the base station 120 is located in a location surrounded by more than 10 frequencies of 5G and/or LTE frequencies of the wireless communication system, the base station 120 may determine the RRM configuration used in the previous NR RRC CONNECTED 460 state as the RRM configuration for the current NR RRC IDLE 420 or INACTIVE 440 state. When the base station 120 is located at a location surrounded by less than two 5G frequencies and/or LTE frequencies of the wireless communication system, the base station 120 may determine the RRM configuration used in the previous NR RRC IDLE 420 state as the RRM configuration of the current NR RRC IDLE 420 or INACTIVE 440 state.

In some embodiments, the method 1100 may include determining the RRM configuration based on the speed of the user equipment. For example, after receiving or detecting the velocity of the user equipment 140, the base station 120 determines the RRM configuration depending on whether the user equipment 140 is moving at a velocity exceeding 50 kilometers per hour. When the user equipment 140 moves at speeds in excess of 50 kilometers per hour, the base station 120 may determine the RRM configuration used in the previous NR RRC CONNECTED 460 state as the RRM configuration for the current NR RRC IDLE 420 or INACTIVE 440 state. When the user device 140 moves at a speed of less than 3 kilometers per hour, the base station 120 may determine the RRM configuration used in the previous NR RRC IDLE 420 state as the RRM configuration for the current NR RRC IDLE 420 or INACTIVE 440 state.

Fig. 12 is a schematic diagram of an example user equipment 1200 for radio resource measurement in idle, inactive or suspended state in a wireless communication system, in accordance with some embodiments of the present application. The user equipment 140 or 160 shown in fig. 1 may be configured as a user equipment 1200. User device 1200 includes memory 1210, processor 1220, storage 1230, I/O interface 1240 and communications unit 1250. One or more of these elements of user equipment 1200 may be included for radio resource measurements in idle, inactive, or suspended states in a wireless communication system. These elements may be configured to transmit data and send or receive instructions between each other.

Processor 1220 comprises any suitable type of general or special purpose microprocessor, digital signal processor, or microcontroller. Processor 1220 may represent one or more processors in user device 140 or 160. Memory 1210 and storage 1230 may comprise any suitable type of mass storage device configured to store any type of information that processor 1220 needs to operate on. The memory 1210 and storage 1230 may be volatile or non-volatile, magnetic, semiconductor, tape, optical, removable, non-removable, or other types of storage devices or tangible (i.e., non-transitory) computer-readable media, including but not limited to read-only memory (ROM), flash memory, dynamic random-access memory (RAM), and static RAM. Memory 1210 and/or storage 1230 may be configured to store one or more programs for execution by processor 1220 for radio resource measurements in idle, inactive, or suspended states in a wireless communication system, as disclosed herein.

The memory 1210 and/or storage 1230 may also be configured to store information and data used by the processor 1220. For example, memory 1210 and/or storage 1230 may be configured to store therein the received RRM configuration for user device 1200.

The I/O interface 1240 may be configured to facilitate communications between the user equipment 1200 and other devices. For example, the I/O interface 1240 may receive a signal from another device (e.g., a computer) including system configuration information of the user equipment 1200. The I/O interface 1240 may also output data of the measurement result to other devices.

The communication unit 1250 may include one or more cellular communication modules including, for example, a 5G wireless Access System, Long Term Evolution (LTE), High Speed Packet Access (HSPA), Wideband Code-Division Multiple Access (WCDMA), and/or Global System for Mobile communication (GSM) communication modules.

The processor 1220 may be configured to obtain the RRM configuration. For example, as shown in fig. 5, the processor 1220 may be configured to receive the RRM configuration 520 transmitted by the base station 120. The RRM configuration 520 is used for IDLE, inactive, or suspended states, such as NR RRC IDLE 320, NR RRC INACTIVE 340, E-UTRA RRC IDLE 310, NR RRC IDLE 420, NR RRC INACTIVE 440, or E-UTRA RRC IDLE 410 in FIGS. 3A, 3B, 4A, or 4B.

The processor 1220 may also be configured to trigger measurements based on the RRM configuration. For example, as shown in fig. 5, the processor 1220 is configured to trigger the measurements 540 based on the RRM configuration 520 when the user equipment 140 has data to transmit.

The processor 1220 may also be configured to control the user equipment 1200 to measure radio resources. For example, as shown in fig. 5, the processor 1220 may be configured to control the user equipment 1200 to measure all possible frequencies available for CA or DC and collect RRM results, respectively.

The processor 1220 may also be configured to transmit the measurement results to the base station. For example, as shown in fig. 5, processor 1220 may be configured to send collected RRM results 580 to base station 120.

The processor 1220 may also be configured to send an indication to the BS before the user equipment leaves the connected or active state. The indication indicates the RRM configuration of the plurality of RRM configurations. For example, as shown in fig. 7, after determining the RRM configuration 720, the processor 1220 may be configured to send an indication 730 to the base station 120 before the user device 1200 leaves the connected or active state. For example, the processor 1220 may be configured to send a configuration index of the determined RRM configuration to the base station 120 before the user device 1200 leaves the NR RRC CONNECTED 360 state. The user equipment 1200 in the NR RRC CONNECTED 360 state sends the configuration index of the determined RRM configuration to the base station 120 before leaving the NR RRC CONNECTED 360 state. The configuration index may indicate one of the ten RRM configurations as the determined RRM configuration.

In some embodiments, the processor 1220 may be configured to obtain the RRM configuration by determining the RRM configuration from previous RRM configurations used in previous idle, inactive or suspended states before the user device 1200 enters the current idle, inactive or suspended state. For example, as shown in fig. 6, the base station 120 and the user equipment 1200 already use the RRM configuration 620 in the previous measurement, or at least both have a stored RRM configuration 620. The base station 120 and the user equipment 1200 implicitly determine the RRM configuration 620 as a default RRM configuration without further signaling therebetween. The RRM configuration 620 may be used in IDLE, inactive, or suspended states, such as NR RRC IDLE 320, NR RRC INACTIVE 340, E-UTRA RRC IDLE 310, NR RRC IDLE 420, NR RRC INACTIVE 440, or E-UTRA RRC IDLE 410 in fig. 3A, 3B, 4A, or 4B. The processor 1220 may be configured to determine the RRM configuration from previous RRM configurations used in previous NR RRC IDLE 320 0, INACTIVE 340 states before the user device 1200 entered the current NR RRC IDLE 320 or INACTIVE 340 state.

In some embodiments, the processor 1220 may be configured to obtain the RRM configuration by determining the RRM configuration from the RRM configurations used in the previous connected or active state before the user equipment enters the current idle, inactive or suspended state. For example, as shown in fig. 7, the processor 1220 may be configured to determine to use a previous RRM configuration in the NR RRC CONNECTED 360 state to make measurements in the current NR RRC IDLE 320 or INACTIVE 340 state.

In some embodiments, the processor 1220 may be configured to obtain the RRM configuration by determining the RRM configuration from the service configuration used in the previous connected or active state before the user equipment enters the current idle, inactive or suspended state. For example, the processor 1220 may be configured to determine the RRM configuration according to whether the service configuration is a short packet transmission. If the service configuration is a short packet transmission, the processor 1220 may be configured to determine to use the RRM configuration used during the previous short packet transmission. If the service configuration is not a short packet transmission, the processor 1220 may be configured to determine to reuse a previous RRM configuration used in the NR IDLE 320 or INACTIVE 340 state.

In some embodiments, the processor 1220 may be configured to obtain the RRM configuration by determining the RRM configuration according to a network environment. For example, the processor 1220 may be configured to determine the RRM configuration according to a network topology in which the user device 1200 is located. For example, when the user equipment 1200 is located in a position surrounded by more than 10 frequencies of 5G and/or LTE frequencies of the wireless communication system, the processor 1220 may be configured to determine the RRM configuration used in the previous NR RRC CONNECTED 360 state as the RRM configuration for the current NR RRC IDLE 320 or INACTIVE 340 state. When the user equipment 1200 is located at a position surrounded by less than two 5G frequencies and/or LTE frequencies of the wireless communication system, the processor 1220 may be configured to determine the RRM configuration used in the previous NR RRC IDLE 320 state as the RRM configuration of the current NR RRC IDLE 320 0 or INACTIVE 340 state.

In some embodiments, the processor 1220 may be configured to obtain the RRM configuration by determining the RRM configuration from the velocity of the user equipment. For example, the processor 1220 may be configured to determine the RRM configuration based on whether the user device 1200 is moving at a speed in excess of 50 kilometers per hour. When user device 1200 is moving at speeds in excess of 50 kilometers per hour, processor 1220 may be configured to determine the RRM configuration used in the previous NR RRC CONNECTED 360 state as the RRM configuration for the current NR RRC IDLE 320 or INACTIVE 340 state. When the user device 1200 is moving at a speed of less than 3 kilometers per hour, the processor 1220 may be configured to determine the RRM configuration used in the previous NR RRC IDLE 320 state as the RRM configuration for the current NR RRC IDLE 320 0 or INACTIVE 340 state.

In some embodiments, the processor 1220 may be configured to obtain the RRM configuration by receiving a configuration index for a set of RRM configurations in a paging message, a random access response message, or a system information message from the BS. The configuration index indicates one of the set of RRM configurations as the RRM configuration. For example, as shown in fig. 8, the processor 1220 may be configured to control the user equipment 1200 to receive a configuration index in a paging message 821, a random access response message 822, or a system information message 823 from the base station 120. After receiving the configuration index, the processor 1220 may be configured to determine one of a set of RRM configurations as the RRM configuration for the user device 1200 to measure in NR RRC IDLE 320 or INACTIVE 340 state.

In some embodiments, the processor 1220 may be configured to trigger a measurement if: when receiving data to be transmitted in a buffer of the user equipment, after transmitting the RACH message, or after transmitting a connection request. The connection request includes an establishment cause indicating that the user equipment has data to send. For example, the processor 1220 may be configured to trigger measurements upon receiving data to be transmitted in a transmission queue of the user equipment 1200. As another example, the processor 1220 may be configured to trigger measurements after transmitting a RACH preamble to the base station 120. As another example, processor 1220 may be configured to trigger measurements after sending a connection request to base station 120. The connection request includes an establishment cause indicating that the user equipment 1200 has data to send.

In some embodiments, the processor 1220 may be configured to receive one of a paging message, a random access response message, or a system information message including an activation indication, and trigger measurements based on the RRM configuration. For example, as shown in fig. 8, after the processor 1220 is configured to receive the paging message 821, the random access response message 822, or the system information message 823 including the activation indication, the processor 1220 may be configured to trigger the measurements 840 based on the determined RRM configuration.

Fig. 13 is a diagram of an example network apparatus 1300 for radio resource measurement in idle, inactive, or suspended state in a wireless communication system, in accordance with some embodiments of the present application. Network device 1300 includes memory 1310, processor 1320, storage 1330, I/O interfaces 1340, and communication unit 1350. One or more of these elements of network apparatus 1300 may be included for radio resource measurements in an idle, inactive, or suspended state in a wireless communication system. These elements may be configured to transmit data and send or receive instructions between each other. The base station 120 shown in fig. 1 may be configured as a network apparatus 1300. The network device 1300 may be a base station, a relay station, a remote radio unit, a network node, or a home base station in a wireless communication system.

Processor 1320 includes any suitable type of general or special purpose microprocessor, digital signal processor, or microcontroller. Processor 1320 may represent one or more processors in base station 120. Memory 1310 and storage 1330 may be configured as described above for memory 1210 and storage 1230. Memory 1310 and/or storage 1330 may also be configured to store information and data used by processor 1320. For example, memory 1310 and/or storage 1330 may be configured to store RRM configurations for user devices 140 and 160.

I/O interface 1340 may be configured to facilitate communication between network device 1300 and other devices. For example, I/O interface 1340 may receive a signal from another device (e.g., a computer) that includes system configuration information for network device 1300. I/O interface 1340 may also output RRM configured data to other devices.

The communication unit 1350 may include one or more cellular communication modules including, for example, a 5G radio access system, Long Term Evolution (LTE), High Speed Packet Access (HSPA), Wideband Code Division Multiple Access (WCDMA), and/or global system for mobile communication (GSM) communication modules.

The processor 1320 may be configured to transmit the RRM configuration to the user equipment. For example, as shown in fig. 5, processor 1320 may be configured to transmit RRM configuration 520 to user device 140. The RRM configuration 520 is used for IDLE, inactive, or suspended states, such as NR RRC IDLE 320, NR RRC INACTIVE 340, E-UTRA RRC IDLE 310, NR RRC IDLE 420, NR RRC INACTIVE 440, or E-UTRA RRC IDLE 410 in FIGS. 3A, 3B, 4A, or 4B.

The processor 1320 may also be configured to trigger measurements based on the RRM configuration. The processor 1320 may be configured to trigger measurements based on the RRM configuration when the network apparatus 1300 is in an idle, inactive, or suspended state. For example, as shown in fig. 5, the processor 1320 may be configured to trigger the measurements 540 based on the RRM configuration 520 when the user equipment 140 has data to receive.

The processor 1320 may also be configured to receive results of the RRM configuration based measurements from the user equipment. For example, as shown in fig. 5, the processor 1320 may be configured to receive the RRM result 580 from the user device 140 after the user device 140 measures all possible frequencies and collects the RRM result 580.

In some embodiments, the processor 1320 may be configured to trigger measurements based on the RRM configuration upon receiving data to be transmitted in a buffer of the BS, after receiving a RACH message, or after receiving a connection request from a user equipment. The connection request includes an establishment cause indicating that the user equipment has data to send.

For example, in the measurement triggers 540, 640, 740, 840, and 940, the processor 1320 may be configured to trigger RRM measurements when the network device 1300 receives data to be transmitted in a transmission queue from a 5G or E-UTRA network system. As another example, in the above-described measurement triggers 540, 640, 740, 840, and 940, the processor 1320 may be configured to trigger the RRM measurement after receiving the random access preamble from the user equipment 140. Alternatively, in the above-described measurement triggers 540, 640, 740, 840 and 940, the processor 1320 may be configured to trigger the RRM measurement after sending the connection request to the user equipment 140. After the network apparatus 1300 transmits the connection request, the network apparatus 1300 requires the measurement result from the user equipment 140 to allocate the radio resource and transmission scheme for the connection with the user equipment 140.

In some embodiments, the processor 1320 may be configured to transmit one of a paging message, a random access response message, or a system information message including an activation indication to the user equipment. For example, as shown in fig. 8, the processor 1320 may be configured to send one of a paging message 821, a random access response message 822, or a system information message 823 including an activation indication to the user equipment 140 to trigger the measurement 840.

In some embodiments, the processor 1320 may be configured to transmit a configuration index for a set of RRM configurations to the user equipment in a paging message, a random access response message, or a system information message. The configuration index further indicates one of the set of RRM configurations as the RRM configuration. For example, as shown in fig. 8, the processor 1320 may be configured to transmit the configuration index in the paging message 821, the random access response message 822, or the system information message 823 to the user equipment 140. After the user equipment 140 receives the configuration index, the user equipment 140 may determine one of a set of RRM configurations as the RRM configuration of the user equipment 140 to measure in NR RRC IDLE 320 or INACTIVE 340 state.

In some embodiments, the processor 1320 may be configured to determine the RRM configuration from a previous RRM configuration used in a previous idle, inactive or suspended state before the user device enters the current idle, inactive or suspended state. For example, as shown in fig. 9, the processor 1320 may be configured to determine to use a previous RRM configuration in the NR RRC CONNECTED 460 state to make measurements in the current NR RRC IDLE 420 or INACTIVE 440 state. After the RRM configuration determination 920, the processor 1320 is configured to transmit an indication 930 of the RRM configuration to the user device 140.

In some embodiments, the processor 1320 may be configured to determine the RRM configuration from the RRM configuration used in the previously connected or active state before the user equipment enters the current idle, inactive or suspended state. For example, as shown in fig. 9, the processor 1320 may be configured to determine to use a previous RRM configuration in the NR RRC CONNECTED 460 state to make measurements in the current NR RRC IDLE 420 or INACTIVE 440 state.

In some embodiments, the processor 1320 may be configured to determine the RRM configuration from a service configuration used in a previously connected or active state before the user equipment enters a current idle, inactive or suspended state. For example, the processor 1320 may be configured to determine the RRM configuration based on whether the service configuration is a short packet transmission. If the service configuration is a short packet transmission, the processor 1320 may be configured to determine to use the RRM configuration used during the previous short packet transmission. If the service configuration is not a short packet transmission, the processor 1320 may be configured to determine to reuse a previous RRM configuration used in the NR IDLE 420 or INACTIVE 440 state.

In some embodiments, the processor 1320 may be configured to determine the RRM configuration from the network environment. For example, the processor 1320 may be configured to determine the RRM configuration based on the network topology in which the network apparatus 1300 is located. For example, when the network apparatus 1300 is located in a location surrounded by more than 10 frequencies of 5G and/or LTE frequencies of the wireless communication system, the processor 1320 may be configured to determine the RRM configuration used in the previous NR RRC CONNECTED 460 state as the RRM configuration for the current NR RRC IDLE 420 or INACTIVE 440 state. When the network apparatus 1300 is located at a location surrounded by less than two 5G frequencies and/or LTE frequencies of the wireless communication system, the processor 1320 may be configured to determine an RRM configuration used in a previous NR RRC IDLE 420 state as the RRM configuration for the current NR RRC IDLE 420 or INACTIVE 440 state.

In some embodiments, the processor 1320 may be configured to determine the RRM configuration from the velocity of the user device. For example, after receiving or detecting the velocity of the user device 140, the processor 1320 may be configured to determine the RRM configuration depending on whether the user device 140 is moving at a velocity in excess of 50 kilometers per hour. When the user device 140 is moving at a velocity in excess of 50 kilometers per hour, the processor 1320 may be configured to determine the RRM configuration used in the previous NR RRC CONNECTED 460 state as the RRM configuration for the current NR RRC IDLE 420 or INACTIVE 440 state. When the user device 140 is moving at a speed of less than 3 kilometers per hour, the processor 1320 may be configured to determine the RRM configuration used in the previous NR RRC IDLE 420 state as the RRM configuration for the current NR RRC IDLE 420 or INACTIVE 440 state.

Another aspect of the application relates to a non-transitory computer-readable medium having stored thereon instructions that, when executed, cause one or more processors to perform the method described above. For example, the instructions may be stored on a non-transitory computer readable medium included in memory 1210 and/or storage 1230 of the user device for execution by processor 1220, or stored on a non-transitory computer readable medium included in memory 1310 and/or storage 1330 of network apparatus 1300 for execution by processor 1320. The computer-readable medium may include volatile or nonvolatile, magnetic, semiconductor, tape, optical, removable, non-removable, or other types of computer-readable medium or computer-readable storage device. For example, as disclosed herein, a computer-readable medium may be a storage device or a memory module having stored thereon computer instructions. In some embodiments, the computer readable medium may be a disk or flash drive having computer instructions stored thereon.

It will be understood that the present application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings, and that various modifications and variations can be made therein without departing from the scope thereof. It is intended that the scope of the application be limited only by the claims appended hereto.

Claims

1. A method of a user equipment performing radio resource measurement in a wireless communication system, comprising:

obtaining a first Radio Resource Measurement (RRM) configuration, the first RRM configuration being one of a set of RRM configurations;

triggering a measurement based on the first RRM configuration; and

transmitting a result of the measurement to a base station;

wherein the user equipment and the base station are configured to operate together in one of the states comprising:

idle, inactive or suspended states, and

connected or activated state, and

the first RRM is configured for the idle, inactive, or suspended state;

wherein the first RRM configuration comprises: a previous first RRM configuration used in a previous idle, inactive or suspended state before the user equipment enters a current idle, inactive or suspended state;

transmitting a first indication to the base station before the user equipment leaves a connected or active state, wherein the first indication indicates the first RRM configuration.

2. The method of claim 1, wherein obtaining the first RRM configuration further comprises determining the first RRM configuration from one of:

a second RRM configuration for use in a previously connected or active state before the user equipment enters a current idle, inactive or suspended state,

a service configuration used in a previously connected or active state before the user equipment enters a current idle, inactive or suspended state.

3. The method of claim 1, wherein obtaining the first RRM configuration comprises receiving, from the base station, a configuration index for a set of RRM configurations in one of:

a paging message is sent to the mobile station,

random access response message, or

A system information message, which is transmitted from the mobile station,

wherein the configuration index indicates that one of the set of RRM configurations is the first RRM configuration.

4. The method of claim 1, wherein triggering the measurement based on the first RRM configuration comprises triggering the measurement at one of:

when receiving data to be transmitted in a buffer of the user equipment;

after transmitting a Random Access Channel (RACH) message; or

After sending the connection request, wherein the connection request includes an establishment cause indicating that the user equipment has data to send.

5. The method of claim 1, wherein triggering the measurement based on the first RRM configuration comprises:

receiving one of a paging message, a random access response message, and a system information message including an activation indication; and

triggering the measurement according to the first RRM configuration.

6. A method for a base station of radio resource measurement at a user equipment in a wireless communication system, comprising:

receiving a first indication from the user equipment, wherein the first indication indicates a first Radio Resource Measurement (RRM) configuration, the first RRM configuration being one of a set of RRM configurations; wherein the first RRM configuration comprises: a previous first RRM configuration used in a previous idle, inactive or suspended state before the user equipment enters a current idle, inactive or suspended state;

receiving, from the user equipment, a result of the measurement based on the first RRM configuration;

idle, inactive or suspended states, and

connected or activated state, and

the first RRM is configured for the idle, inactive, or suspended state.

7. The method of claim 6, further comprising:

triggering a measurement based on the first RRM configuration.

8. The method of claim 7, wherein triggering the measurement based on the first RRM configuration comprises:

transmitting one of a paging message, a random access response message, and a system information message including an activation indication to the user equipment.

9. The method of claim 7, wherein triggering the measurement based on the first RRM configuration comprises triggering the measurement at one of:

when receiving data to be transmitted in a buffer of the base station;

after receiving a Random Access Channel (RACH) message; or

After receiving a connection request from the user equipment, wherein the connection request includes an establishment cause indicating that the user equipment has data to send.

10. A method for a base station of radio resource measurement at a user equipment in a wireless communication system, comprising:

transmitting a first Radio Resource Measurement (RRM) configuration to the user equipment, the first RRM configuration being one of a set of RRM configurations; wherein the first RRM configuration comprises: a previous first RRM configuration used in a previous idle, inactive or suspended state before the user equipment enters a current idle, inactive or suspended state; and

idle, inactive or suspended states, and

connected or activated state, and

the first RRM is configured for the idle, inactive, or suspended state.

11. The method of claim 10, wherein transmitting the first RRM configuration comprises:

transmitting a configuration index for a set of RRM configurations to the user equipment in one of:

a paging message is sent to the mobile station,

random access response message, or

A system information message, which is transmitted from the mobile station,

12. The method of claim 10, further comprising:

determining the first RRM configuration according to one of:

13. The method of claim 10, further comprising:

triggering a measurement based on the first RRM configuration.

14. The method of claim 13, wherein triggering the measurement based on the first RRM configuration comprises:

15. The method of claim 13, wherein triggering the measurement based on the first RRM configuration comprises triggering the measurement at one of:

when receiving data to be transmitted in a buffer of the base station;

after receiving a Random Access Channel (RACH) message; or

16. A user equipment for radio resource measurement in a wireless communication system, comprising:

a memory to store instructions; and

a processor configured to execute the instructions to cause the user equipment to:

triggering a measurement based on the first RRM configuration; and

transmitting a result of the measurement to a base station;

idle, inactive or suspended states, and

connected or activated state, and

the first RRM is configured for the idle, inactive, or suspended state;

the processor is further configured to execute the instructions to cause the user equipment to:

17. The user equipment of claim 16, wherein the processor is further configured to execute the instructions to cause the user equipment to obtain the first RRM configuration by determining the first RRM configuration from one of:

18. The user equipment of claim 16, wherein the processor is configured to execute the instructions to cause the user equipment to obtain the first RRM configuration by receiving, from the base station, a configuration index for a set of RRM configurations in one of:

a paging message is sent to the mobile station,

random access response message, or

A system information message, which is transmitted from the mobile station,

19. The user equipment of claim 16, wherein the processor is further configured to execute the instructions to cause the user equipment to trigger the measurements based on the first RRM configuration if one of:

when receiving data to be transmitted in a buffer of the user equipment;

after transmitting a Random Access Channel (RACH) message; or

20. The user equipment of claim 16, wherein the processor is further configured to execute the instructions to cause the user equipment to: prior to triggering the measurement based on the first RRM configuration,

one of a paging message, a random access response message, and a system information message including an activation indication is received.

21. A network apparatus for radio resource management of a user equipment in a wireless communication system, comprising:

a memory to store instructions; and

a processor configured to execute the instructions to cause the network apparatus to:

receiving a first indication from the user equipment, wherein the first indication indicates a first Radio Resource Management (RRM) configuration, the first RRM configuration being one of a set of RRM configurations; wherein the first RRM configuration comprises: a previous first RRM configuration used in a previous idle, inactive or suspended state before the user equipment enters a current idle, inactive or suspended state; and

wherein the user equipment and the network device are configured to operate together in one of the states comprising:

idle, inactive or suspended states, and

connected or activated state, and

the first RRM is configured for the idle, inactive, or suspended state.

22. The network device of claim 21, wherein the processor is further configured to execute the instructions to cause the network device to:

triggering a measurement based on the first RRM configuration.

23. The network apparatus of claim 21, wherein the processor is configured to execute the instructions to cause the network apparatus to trigger the measurement based on the first RRM configuration by:

24. The network apparatus of claim 21, wherein the processor is further configured to execute the instructions to cause the network apparatus to trigger the measurement based on the first RRM configuration if one of:

when receiving data to be transmitted in a buffer of a base station;

after receiving a Random Access Channel (RACH) message; or

25. A network apparatus for radio resource management of a user equipment in a wireless communication system, comprising:

a memory to store instructions; and

wherein the user equipment and network device are configured to operate together in one of the states comprising:

idle, inactive or suspended states, and

connected or activated state, and

the first RRM is configured for the idle, inactive, or suspended state.

26. The network apparatus of claim 25, wherein the processor is configured to execute the instructions to cause the network apparatus to transmit the first RRM configuration by:

a paging message is sent to the mobile station,

random access response message, or

A system information message, which is transmitted from the mobile station,

27. The network apparatus of claim 25, wherein the processor is further configured to execute the instructions to cause the network apparatus to determine the first RRM configuration based on one of:

28. The network device of claim 25, wherein the processor is further configured to execute the instructions to cause the network device to:

triggering a measurement based on the first RRM configuration.

29. The network device of claim 28, wherein the processor is configured to execute the instructions to cause the network device to trigger the measurement based on the first RRM by:

30. The network apparatus of claim 28, wherein the processor is further configured to execute the instructions to cause the network apparatus to trigger the measurement based on the first RRM configuration if one of:

when receiving data to be transmitted in a buffer of a base station;

after receiving a Random Access Channel (RACH) message; or

31. A non-transitory computer-readable medium storing instructions for execution by one or more processors of an apparatus to perform a method for radio resource management in a wireless communication system, the method comprising:

triggering a measurement based on the first RRM configuration; and

transmitting a result of the measurement to a base station;

wherein the apparatus and the base station are configured to operate together in one of the states comprising:

idle, inactive or suspended states, and

connected or activated state, and

the first RRM is configured for the idle, inactive, or suspended state;

wherein the first RRM configuration comprises: a previous first RRM configuration used in a previous idle, inactive or suspended state before the user equipment enters the current idle, inactive or suspended state;

32. A non-transitory computer-readable medium storing instructions for execution by one or more processors of an apparatus to perform a method for radio resource management in a wireless communication system, the method comprising:

receiving a first indication from a user equipment, wherein the first indication indicates a first Radio Resource Management (RRM) configuration, the first RRM configuration being one of a set of RRM configurations; wherein the first RRM configuration comprises: a previous first RRM configuration used in a previous idle, inactive or suspended state before the user equipment enters a current idle, inactive or suspended state; and obtaining the first RRM configuration; and

wherein the user equipment and the apparatus are configured to operate in one of the states comprising:

idle, inactive or suspended states, and

connected or activated state, and

the first RRM is configured for the idle, inactive, or suspended state.

33. A non-transitory computer-readable medium storing instructions for execution by one or more processors of an apparatus to perform a method for radio resource management in a wireless communication system, the method comprising:

transmitting a first Radio Resource Measurement (RRM) configuration to a user equipment, the first RRM configuration being one of a set of RRM configurations; wherein the first RRM configuration comprises: a previous first RRM configuration used in a previous idle, inactive or suspended state before the user equipment enters a current idle, inactive or suspended state; and

wherein the user equipment and the apparatus are configured to operate together in one of the states comprising:

idle, inactive or suspended states, and

connected or activated state, and

the first RRM is configured for the idle, inactive, or suspended state.