TWI704817B - Radio resource management (rrm) measurement for new radio (nr) network - Google Patents

Abstract

Apparatus and methods are provided for RRM measurement in the NR network. In one novel aspect, the RRM measurement is configured with one measurement gap for SS block and CSI-RS. In one embodiment, an extended MGL (eMGL) is configured such that the SS block and CSI-RS is measurement within one measurement gap. In another embodiment, the shorter MGL (sMGL) that is shorter than the standard MGL is configured. In another novel aspect, the CSI-RS is allocated adjacent to the SS blocks such that one measurement gap is configured for both the SS block and CSI-RS measurement. In another novel aspect, the CSI-RS measurement is conditionally configured. In yet another novel aspect, the UE decodes the time index of the SS block conditionally.

Description

Radio Resource Management (RRM) measurement for New Radio (NR) network

The present invention generally relates to wireless communication, and more specifically, to a power-efficient (radio resource management, RRM) method and apparatus for a new radio (NR) network.

Mobile network communications continue to grow rapidly. Mobile data usage will continue to soar. New data applications and services will require higher speed and higher efficiency. Big data bandwidth applications continue to attract more consumers. New technologies have been developed to meet the growth, such as carrier aggregation (CA), which enables operators, suppliers, content providers and other mobile users to meet the increasing demand for data bandwidth. The implementation of NR technology in 5G wireless networks can increase network capacity.

In the LTE network, the measurement gap is used for inter-frequency measurement. In NR, when all measurement resources overlap with the measurement gap, the measurement gap is used for inter-frequency measurement, intra-frequency measurement with gaps and intra-frequency measurement without gaps. For RRM measurement in NR, the UE can be configured to measure synchronization information Number (synchronization signal, SS) block and/or channel state information reference signal (CSI-RS). The transaction of the SS block is limited within a 5ms time window, and the transmission of CSI-RS can be moved more flexibly. This increases the complexity of RRM measurement of SS blocks and CSI-RS.

An improvement and enhancement is needed to configure and perform RRM measurements for NR networks more effectively.

A method and device for RRM measurement in NR network are provided. In a novel aspect, RRM measurement is configured with one measurement gap for SS block and CSI-RS. In one example, the extended MGL (eMGL) is configured so that the SS block and the CSI-RS are measured in one measurement gap. In another example, a short MGL (sMGL) that is shorter than the standard MGL is configured. In yet another example, a single common measurement duration and a single common time offset are configured for different CSI-RS resources. In one embodiment, the RRM measurement configuration configures SS block measurement and CSI-RS measurement when the UE performs initial synchronization, and wherein the measurement gap is configured to have an extended measurement gap length (eMGL) greater than the standard MGL, so that the SS block and CSI-RS RS is measured in eMGL. In another embodiment, the RRM measurement configuration only configures CSI-RS measurement after the UE performs initial synchronization, and wherein the measurement gap is configured to have a short measurement gap length (sMGL) smaller than the standard MGL. In yet another embodiment, the RRM configuration and measurement gap configuration are configured by dedicated signaling.

In another novel aspect, CSI-RS is allocated adjacent SS blocks, so that a measurement gap is configured for SS block and CSI-RS measurement. In one embodiment CSI-RS is allocated in the physical downlink shared channel (PDSCH) symbol located before the SS block. In another embodiment, the CSI-RS is allocated in a physical downlink shared channel (PDSCH) symbol located after the SS block. In yet another embodiment, the SS block is an SS burst block spanning a plurality of analog beams, and wherein the CSI-RS is allocated in a physical downlink shared channel (PDSCH) symbol located after the SS block. In one embodiment, the same analog beamforming is applied to the SS burst block and the CSI-RS burst block.

In another novel aspect, CSI-RS measurements are conditionally configured. In one embodiment, the UE receives RRM measurement configuration, which includes conditional measurement configuration for CSI-RS measurement. The conditional measurement configuration for CSI-RS is based on one of the following trigger conditions, the trigger conditions including: measurement results of beam management of the serving cell, synchronization signal (SS) block measurement results, and no trigger conditions.

In yet another novel aspect, the UE conditionally decodes the time index of the SS block. The UE performs RRM measurement in the CONNECTED state according to the received RRM measurement configuration, where the UE only decodes the time index of the configured SS block when one or more time index trigger conditions are detected. In one embodiment, the UE performs RRM measurements on the SS blocks of the serving cell and one or more neighbor cells to obtain SS block measurements. In one embodiment, the time index trigger condition includes: channel condition (condition), random-access channel (random-access channel, RACH) optimization is enabled, and NBRCSI-RS is configured and sufficient for RACH optimization. In one embodiment, the RRM measurement configuration includes a CSI-RS measurement configuration based on one of a plurality of trigger conditions. A number of conditional measurement configurations, the plurality of trigger conditions include: the measurement result of the beam management from the serving cell, the measurement result of the SS block, and no trigger condition.

Other embodiments and advantages are described in the detailed description below. This summary is not intended to limit the invention. The present invention is defined by the claims.

100: wireless network

102, 103, 104: basic unit

101, 105, 106, 107, 108 109: UE

111: Uplink

112: Downlink

113, 114, 115 117, 118, 119: backhaul line connection

102: base station

126: Antenna

191: RRM measurement configuration

192: RRM measurement

193: RRM measurement gap

194: RRM measurement report

132: Processor

131: Memory

136: Program

134: Transceiver

123: Transceiver

122: processor

121: memory

124: Program

181: RRM measurement

211, 221, 231: MGL

212, 222, 232: MGRP

223, 233: x

225, 235, 227, 237: SS

226, 228, 236, 238: CSI-RS

210, 220, 230: schematic diagram

301, 302, 311, 321, 312, 322: steps

500, 501, 502, 503, 504, 505: steps

610, 620, 630: schematic diagram

611, 612, 613, 614: analog beam

621, 622, 623, 624: analog beam

631, 632, 633, 634: analog beam

615-618, 625-628, 635-638: SS block

651, 652, 653, 654: analog beam

655, 656, 657, 658: SS block

661, 662, 663, 664: analog beam

665, 666, 667, 668: SS block

710: SS burst

720: CSI-RS burst

801, 802, 803: steps

901, 902, 903: steps

1001, 1002, 1003: steps

1101, 1102, 1103: steps

The drawings show embodiments of the present invention. In the drawings, the same numbers indicate the same components.

Figure 1 shows a system diagram of an NR wireless network 110 based on an embodiment of the present invention, where the NR wireless network 100 has SS blocks and/or CSI-RS measurements for RRM measurement; Figure 2 shows a system diagram based on the present invention An exemplary schematic diagram of the measurement gap configuration for the UE in the NR network of the embodiment, so that SS block and CSI-RS measurements are performed in one gap; Figure 3 shows the UE using different RRM measurements based on the embodiment of the present invention An exemplary schematic diagram of configuring the implementation of initial synchronization and fine synchronization; Figure 4A shows an exemplary table of CSI-RS configuration with exemplary configuration values based on an embodiment of the present invention; Figure 4B shows an exemplary table based on an embodiment of the present invention. An example table of CSI-RS configuration with example configuration values when using CSI-RS configuration for beam management; Fig. 5 shows an example of a UE having RRM measurement in connected CONNECTED mode in an NR network based on an embodiment of the present invention An exemplary schematic diagram of the handover process; Figure 6A is an exemplary schematic diagram of CSI-RS arranged in 5 milliseconds of the SS burst and adjacent to the SS block based on an embodiment of the present invention for 15/30/120kHz scenarios; Figure 6B is based on the implementation of the present invention The CSI-RS of the example is arranged in 5 milliseconds of the SS burst and is adjacent to the SS block, for 240kHz scenario; Figure 7 is based on the embodiment of the present invention placing CSI-RS after the SS burst window Figure 8 is an exemplary flow chart of an RRM measurement configuration with a measurement gap for SS blocks and SCI-RS based on an embodiment of the present invention; Figure 9 is an exemplary flow chart of CSI allocation based on an embodiment of the present invention -RS and SS blocks are adjacent to an exemplary flow chart for RRM measurement; Figure 10 is an exemplary flow chart of conditionally configuring CSI-RS for RRM measurement based on an embodiment of the present invention; Figure 11 is based on An exemplary flowchart of the UE conditionally decoding the time index of the SS block in the embodiment of the present invention.

Reference will now be made in detail to some embodiments of the present invention, which are shown in the accompanying drawings.

Figure 1 shows a system diagram of an NR wireless network 100 according to an embodiment of the present invention. The wireless network 100 has SS blocks configured for RRM measurement and/or CSI-RS measurement. The wireless communication system 100 includes one or more wireless networks, and each wireless communication network has a fixed infrastructure unit, such as receiving wireless communication equipment or base units 102, 103, and 104, which form points. A wireless network deployed in a geographical area. The basic unit may also be called an access point, an access terminal, a base station, Node-B, eNode-B, gNB, or other terms used in the art. Each of the base units 102, 103, and 104 serves a geographic area. The base unit performs beamforming in the NR network. Backhaul connections 113, 114, and 115 connect non-co-located receiving base units, such as 102, 103, and 104. These backhaul line connections can be ideal or non-ideal.

The wireless communication device 101 in the wireless network 100 is served by the base station 102 via the uplink 111 and the downlink 112. The other UEs 105, 106, 107, and 108 are served by different base stations. UEs 105 and 106 are served by base station 102. UE 107 is served by base station 104. UE 108 is served by base station 103. In a novel aspect, the RRM measurement is configured by the NR network 100 so that the SS block and CSI-RS are measured in a measurement gap. The measurement gap length (MGL) can be configured with standard MGL (6ms), or extended length eMGL, or short length sMGL. The initial synchronization performed by the UE is configured to have a standard MGL, or an eMGL, or an sMGL, and both the SS block and the CSI-RS are measured in the initial synchronization. Both SS block and CSI-RS can be measured in one measurement gap, so that the UE does not need to retune its RF twice. The initial synchronization performed by the UE including only the SS block may be configured with standard MGL, or eMGL, or sMGL. Which type of MGL is configured depends on the length of the window duration of the SMTC (SS block based RRM measurement timing configuration, SS block based RRM measurement timing configuration). The fine synchronization performed by the UE may be configured with standard MGL, or eMGL, or sMGL, in which only CSI-RS is measured. Which type of MGL is configured depends on the length of the CSI-RS. in In another embodiment, the CRI-RS is allocated adjacent to the SS block. In another embodiment, a single common measurement duration and a single common time offset may be configured for different CSI-RS resources to form CSI-RS burst signaling.

Figure 1 further shows a simplified block diagram of the wireless device/UE 101 and the base station 102 based on the present invention.

The base station 102 has an antenna 126 that transmits and receives radio signals. The RF transceiver module 123 coupled to the antenna receives RF signals from the antenna 126, converts them into baseband signals, and sends them to the processor 122. The RF transceiver 123 also converts baseband signals received from the processor 122, converts them into RF signals, and sends them to the antenna 126. The processor 122 processes the received baseband signal and invokes different functional modules to execute the features in the base station 102. The memory 121 stores program instructions and data 124 to control the operation of the base station 102. The base station 102 also includes a set of control modules, such as an RRM measurement circuit 181, which configures RRM measurement and communicates with the UE to implement the RRM measurement function.

The UE 101 has an antenna 135, which transmits and receives radio signals. The RF transceiver module 134 coupled to the antenna receives RF signals from the antenna 135, converts them into baseband signals, and sends them to the processor 132. The RF transceiver 134 also converts the baseband signals received from the processor 132, converts them into RF signals, and sends them to the antenna 135. The processor 132 processes the received baseband signal and invokes different functional modules to execute the features in the base station 101. The memory 131 stores program instructions and data 136 to control the operation of the mobile station 101.

UE 101 also includes a set of control modules that perform functional tasks. This These functions can be implemented in software, firmware and hardware. The RRM measurement configuration circuit 191 configures an RRM measurement configuration, where the RRM measurement configuration includes a conditional measurement configuration for channel state information reference signal (CSI-RS) measurement. The RRM measurement circuit 192 performs RRM measurement according to the RRM measurement configuration and the measurement gap configuration, and performs RRM measurement in the CONNECTED state of the UE according to the received RRM measurement configuration. The RRM measurement gap circuit 193 obtains the measurement gap configuration so that all configured RRM measurements are performed within one configured measurement gap. The RRM measurement report circuit 194 sends the measurement report to the NR network, where the NR network determines a target cell based on the measurement report for handover.

In a novel aspect, the measurement gap is configured so that SS block and CSI-RS measurements are performed in one measurement gap. In one embodiment, the MGL is configured to accommodate SS block and CSI-RS measurement.

Figure 2 shows an exemplary diagram of a measurement gap configuration for a UE in an NR network according to an embodiment of the present invention, so that SS block and CSI-RS measurements are performed in one measurement gap. In LTE, the measurement gap is used for inter-frequency measurement. The measurement gap is specified by the MGL and the measurement gap repetition period (MGRP). Diagram 210 shows a measurement gap configuration using MGL 211 and MGRP 212. MGL and MGRP have standard configuration values or default configuration values. In one example, the standard MGL value is 6ms, and the standard MGRP value is 40ms.

In the NR network, during the MGL, the UE performs RRM measurement. A longer MGL reduces scheduling opportunities and reduces system performance, and prevents HARQ transmission. In the NR network, for RRM measurement, the UE can be configured to measure both SS blocks and/or CSI-RS. The transmission of the SS block is determined to continue in the SMTC window In time, the transmission of CSI-RS can have better flexibility. This combination is used to complicate the design of the measurement gap of the NR network. In one embodiment, the extended MGL (eMGL) is configured to accommodate SS block bursts and CSI-RS bursts. Diagram 220 shows the configuration of eMGL. Configuration 220 has eMGL 221 and MGRP222. As an example, MGRP222 is the standard MGRP value of 40ms. eMGL is x milliseconds (ms) longer than standard MGL, as shown in 223. eMGL has the value of the sum of standard MGL and x. In one embodiment, eMGL is 6ms+x. The SS block burst 225 and the CSI-RS burst 226 are not suitable for the standard MGL, but can be measured in an eMGL 221. The same applies to SS burst 227 and CSI-RS burst 228. Using the configured eMGL, the UE can perform SS block and CSI-RS RRM measurements in one measurement gap. Using a short MGL configuration improves system performance.

In another example, when only CSI-RS needs to be measured, the short MGL (sMGL) is configured. As shown in the configuration diagram 230, MGL 231 is sMGL. sMGL is xms shorter than standard MGL, as shown in 233. In one embodiment, MGL 231 is a value of (6-x) milliseconds. MGRP 232 still maintains the standard MGRP value. As shown, only the CSI-RS burst 236 is measured during the measurement gap, while the SS burst 235 falls outside the measurement gap and is not measured. The same applies to the SS burst 237, the CSI-RS burst 238 was measured using sMGL in the measurement gap, and the SS burst 237 fell outside the measurement gap and was not measured.

In the NR network, the RRM measurement configuration process configures the RRM measurement gap and other RRM measurement parameters, and the other RRM measurement parameters include SS block configuration and CSI-RS configuration. The RRM measurement gap configuration includes MGL, MGRP, and the time offset of the measurement gap. These RRM measurement related configurations can be The network sends a letter to the UE. The configuration can be updated/changed according to one or more conditions.

Fig. 3 shows an exemplary diagram of a UE using different RRM measurement configurations to perform initial synchronization and fine synchronization according to an embodiment of the present invention. In one embodiment, the UE in the CONNECTED mode uses standard MGL or eMGL or sMGL to perform RRM measurement based on the synchronization phase. In step 301, the UE starts the RRM measurement process in the CONNECTED mode. In step 302, the UE determines whether to perform initial synchronization. If the determination in step 302 is yes, then perform initial synchronization in step 311, and perform initial synchronization according to the SS blocks of other cells. In step 321, the UE measures the SS block and CSI-RS. In one embodiment, the UE is configured with eMGL for step 321. In another embodiment, the UE is configured with a standard MGL. If step 302 determines that it is not the initial synchronization, then in step 312 the UE performs fine synchronization without SS blocks. In step 322, the UE only measures CSI-RS. In one embodiment, the UE is configured with sMGL.

Block 331 also shows an exemplary configuration of RRM measurement in the NR network. The configuration may include RRM measurement gap configuration and RRM measurement configuration. The RRM measurement gap configuration may include configuration parameters including MGL, MGRP, and the time offset of the measurement gap. The RRM measurement configuration may include SMTC configuration and CSI-RS configuration. The SMTC configuration can include one or more elements, the one or more elements including SMTC window period, SMTC window duration, SMTC window time offset, and NR-SSS and PBCH demodulation reference signal (DMRS) Offset on the power. If the power offset on the two reference signals of NR-SSS and PBCH DMRS is not zero, the UE needs this information so that the power estimation is not biased. The CSI-RS configuration includes one or more elements. The one or more elements include cell identification (ID), scrambling code ID, CSI-RS period and time offset, CSI-RS measurement bandwidth, frequency position/CSI- The starting point of the RS sequence, the numerology of CSI-RSI and the quasi-co-location (QCL) of CSI-RS. In one embodiment, RRM configuration parameters are configured by dedicated signaling.

FIG. 4A shows an exemplary table of CSI-RS configuration with exemplary configuration values according to an embodiment of the present invention. In one embodiment, the CSI-RS measurement configuration is a DMTC (discovery reference signal measurement timing configuration) type of CSI-RS burst. As shown, the configuration parameters include bandwidth, numerology, measurement duration, period, time offset, resource ID and cell ID. In one embodiment, a single measurement duration and a single measurement time offset for different CSI-RS IDs can be signaled.

FIG. 4B shows an exemplary table of CSI-RS configurations with exemplary configuration values when the configuration of CSI-RS for beam management is reused according to an embodiment of the present invention. In one embodiment, as shown, if the corresponding cell ID indicates the serving cell, the CSI-RS measurement configuration can reuse the CSI-RS for beam management. Configuration parameters include bandwidth, digital configuration (numerology), period, resource ID, cell ID and time offset to the time reference. In one embodiment, the time reference is an SS block.

In a novel aspect, the UE in CONNECTED mode in the NR network performs RRM measurement with SS block and CSI-RS measurement for the handover process. In an embodiment, the UE conditionally configures CSI-RS measurement according to one or more predefined trigger events. In another embodiment, the UE is based on a One or more predefined trigger conditions conditionally decode the time index of the SS block.

Figure 5 shows an exemplary diagram of a UE handover process with RRM measurement in CONNECTED mode in an NR network according to an embodiment of the present invention. In step 500, the UE performs a handover procedure in the CONNECTED mode. In step 501, the UE obtains the RRM measurement configuration. In one embodiment, the UE obtains the measurement configuration from the network, the measurement configuration includes the measurement configuration of the SS block, the report configuration, and other parameters including the whitelist and frequency priority list of candidate neighbor gNBs. The SS block configuration includes one or more of the trigger time, the measurement gap configuration, and an indicator of whether to measure the reference signal reception quality RSRQ. The report configuration includes switching criteria, whether it is a periodic or event-driven indicator, and one or more elements in the NR measurement report event.

The UE may need to measure many CSI-RS. In a novel aspect, CSI-RS measurements can be configured conditionally. In one embodiment, by monitoring the beam, the CSI-RS measurement configuration can be triggered according to the channel condition and can be associated with the beam, such as an SS block. The CRI-RS measurement configuration can also be triggered by the reference signal received power RSRP of the SS block, including the serving cell and/or neighboring cell. The CRI-RS measurement configuration can also be triggered by CSI-RS for beam management, which is not performed on neighbors' CSI-RS. The CSI-RS used for the RRM of the serving cell may be bursty, and the CSI-RS is limited within a given time interval. In another embodiment, the CSI-RS measurement is configured unconditionally, which is the same as the configuration under the trigger condition, and the trigger condition is not required.

In step 502, the UE performs RRM measurement. In one embodiment, the UE performs measurement on the SS blocks of the serving cell and one or more neighbor cells, To obtain the RSRP and/or RSRQ of the SS block. In another embodiment, the UE conditionally decodes the time index of the SS block according to one or more predetermined conditions. Conditionally triggering the decoding time index increases the UE's calculation amount and reduces power consumption. When a high signal noise ratio (SNR) is detected, the time index is not decoded. When the RACH optimization is not ideal, the time index is not decoded. In another example, when the neighboring NBR CSI-RS is configured and its channel quality is sufficient for RACH optimization, the time index is decoded. In yet another embodiment, if the measurement configuration for CSI-RS is configured, the UE performs measurement on CSI-RS and obtains CSI-RS RSRP and/or CSI-RS RSRQ.

In step 503, the UE sends a measurement report to the serving cell. In one embodiment, when the report condition is met and the measurement event is triggered, a corresponding measurement report is sent. The measurement report includes at least: cell ID and measurement results. The measurement result can be one or more of RSRP, RSRQ or RSSI. The measurement report can also include the time index of the SS block.

In step 504, the UE receives a handover command. The serving cell determines the target cell based on the measurement report and prepares candidate target cells through a backhaul. The handover command includes at least the target cell ID. In one embodiment, contention-free RACH optimization with beam correspondence is implemented to save RACH resources. Instead of assigning a dedicated RACH on each beam, RACH optimization of beam correspondence is implemented. Configure the dedicated RACH parameter in the handover command and associate the dedicated RACH parameter with the DL SS block or CSI-RS.

In step 505, the UE connects to the target cell. If the handover process is successful, the UE sends a handover complete message to the destination gNB.

In another novel aspect, the CSI-RS is arranged as close to the SS block as possible, so that a single measurement gap configuration is sufficient for CSI-RS and SS block measurement. In one example, the CSI-RS is arranged within 5 milliseconds of the SS burst and adjacent to the SS block. In another embodiment, the CSI-RS is arranged after the SS burst. The SS block includes a main SS (PSS) block and a secondary SS (SSS) block. The channel structure of the SS block may have a PSS block and an SSS block adjacent to each other. In another channel structure, the PSS block is adjacent to the SSS block, and the other channel blocks are located between the two. In a possible channel structure, the physical broadcast channel (PBCH), PSS block and SSS are located in consecutive symbols and form an SS/PBCH block. In one configuration, the PBCH block, SSS block, PSS block, and PBCH block occupy consecutive symbols in ascending order. In another configuration, the PSS block, PBCH block, SSS block, and PBCH block occupy consecutive symbols in ascending order. There may be other possible channel structures. Those with ordinary knowledge in the field can understand that the general principle of making the CSI-RS arrangement as close as possible to the SS block makes a single measurement gap configuration sufficient for CSI-RS and SS block measurement, and the general principle is applicable to different Channel structure. In one embodiment, the CSI-RS is placed in the PDSCH symbol adjacent to the SS block. There is at least one symbol PDSCH after each SS block, and the symbol PDSCH can be used to transmit CSI-RS. By placing the CSI-RS in the PDSCH symbols adjacent to the SS block, the CSI-RS can share the same analog beamforming with the SS block. CSI_RS additionally has its own digital beamforming. According to PDSCH availability, CSI-RS can be placed before or after the SS block. There is no need to configure two different MGLs for the SS block and the CSI-RS respectively. The UE can receive the SS block and CSI_RS of a specific cell in one MGL. RF tuning time is saved. In one embodiment, when the CSI-RS is adjacent to the SS block When placed, the MGL can remain as the standard MGL for 6 milliseconds. The following figure is an exemplary scenario for placing CSI-RS. These examples are not exhaustive. Other possibilities of placing the CSI-RS block adjacent to the SS block are also effective.

Fig. 6A is an exemplary schematic diagram of the CSI-RS arrangement within 5 milliseconds of the SS burst and the CSI-RS arrangement adjacent to the SS block based on an embodiment of the present invention, for 15/30/120 kHz scenarios. Diagram 610 shows a first exemplary allocation of CSI-RS. CSI-RS is allocated in NR-PDSCH. As shown, the NR-PDSCH is next to the PBCH and adjacent to the SS block 615, and is the same configuration for the SS block 617. Further, the NR-PDSCH block with CSI-RS and the SS block are located in the same analog beam, that is, the analog beam 611 and the analog beam 613. Similarly, the analog beam 612 and the analog beam 614 include the NR-PDSCH, which is located behind the PSS and PBCH to be adjacent to the SS. The NR-PDSCH and SS blocks containing CSI-RS are located in the same analog beam, that is, the corresponding analog beams 616 and 618. In another example diagram 620, CSI-RS blocks are allocated in NR-PDSCH. As shown, the NR-PDSCH is next to the PBCH and adjacent to the SS block 625, and the same configuration is used for the SS block 627. Further, the NR-PDSCH block with CSI-RS and the SS block are located in the same analog beam, that is, the analog beam 621 and the analog beam 623. Similarly, the analog beam 622 and the analog beam 624 include an NR-PDSCH, which is next to the PBCH to be adjacent to the SS. The NR-PDSCH and SS blocks containing CSI-RS are located in the same analog beam, that is, the corresponding analog beams 622 and 624. In yet another example diagram 630, CSI-RS is allocated in NR-PDSCH. As shown, the NR-PDSCH is next to the PBCH and adjacent to the SS block 636, and the same configuration is used for the SS block 638. Further, the NR-PDSCH block with CSI-RS and The SS blocks are located in the same analog beam, namely, analog beam 632 and analog beam 634. Similarly, the analog beam 631 and the analog beam 633 include an NR-PDSCH, which is located behind the PSS and PBCH to be adjacent to the SS. The NR-PDSCH and SS blocks containing CSI-RS are located in the same analog beam, that is, the corresponding analog beams 631 and 633. The SS block, also shown as SS/PBCH block, 615-618, 625-628, and 635-638 are exemplary structures, so the channel structure is exemplary. It can be understood that other configurations of the SS block or SS/PBCH block are also applicable.

Fig. 6B is an exemplary schematic diagram of CSI-RS arrangement within 5 milliseconds of the SS burst and the CSI-RS arrangement adjacent to the SS block based on an embodiment of the present invention, for a 240 kHz scenario. In an example of diagram 650, CSI-RS is allocated in NR-PDSCH. As shown, the NR-PDSCH is next to the PBCH and adjacent to the SS block 655, and the same configuration is used for the SS blocks 656, 657, and 658. Further, the NR-PDSCH block with CSI-RS and the SS block are located in the same analog beam, that is, the corresponding analog beams 651, 652, 653, and 654. In another example diagram 660, CSI-RS blocks are allocated in NR-PDSCH. As shown, the NR-PDSCH is next to the PBCH and adjacent to the SS block 665, and the same configuration is used for the SS block 667. Further, the NR-PDSCH block with CSI-RS and the SS block are located in the same analog beam, that is, the analog beam 661 and the analog beam 663. Similarly, the analog beam 662 and the analog beam 664 include an NR-PDSCH, which is located behind the PSS and PBCH and adjacent to the SS. The NR-PDSCH and SS blocks containing CSI-RS are located in the same analog beam, that is, the corresponding analog beams 662 and 664. The SS block is also shown as the SS/PBCH block. 655-658 and 665-668 are exemplary structures, so the channel structure is exemplary. It can be understood that other configurations of the SS block or SS/PBCH block are also applicable.

In another example, the CSI-RS is allocated after the SS block burst window and has the same analog beamforming order as the SS block. In one example, the CSI-RS is just after the SS burst window. There is no need to configure two different MGLs for the SS block and the CSI-RS respectively. The UE can receive the SS block and CSI-RS of a specific cell in one MGL. It saves RF tuning time. The number and bandwidth of the transmitted CSI-RS can be expanded to improve measurement accuracy.

FIG. 7 shows an exemplary diagram of placing CSI-RS after the SS burst window according to an embodiment of the present invention. The SS burst 710 includes a plurality of SS blocks, and the plurality of SS blocks includes SS 711, SS 712, and SS 715. The CSI-RS burst 720 is placed immediately after the SS burst 710. The CSI-RS burst 720 has CSI-RS 721, CSI-RS 722 and CSI-RS 725. Similarly, the SS burst 750 includes a plurality of SS blocks including SS 751, SS 752, and SS 755. The CSI-RS burst 760 is placed immediately after the SS burst 750. The CSI-RS burst 760 has CSI-RS 761, CSI-RS 762 and CSI-RS 765. In one embodiment, the CSI-RS burst has the same analog beamforming order as the SS block. For example, SS 711 has the same beamforming as CSI-RS 721. SS 712 and 715 have the same beamforming as CSI-RS 722 and 725, respectively. Similarly, SS 751 has the same beamforming as CSI-RS 761. SS 752 and 755 have the same beamforming as CSI-RS 762 and 765, respectively.

Figure 8 shows an exemplary flow chart of an RRM measurement configuration with one measurement gap for SS blocks and CSI-RS according to an embodiment of the present invention. In step 801, the UE obtains the RRM measurement configuration in the NR network, where the RRM measurement requires the UE to perform at least one of SS measurement and CSI-RS measurement. In step 802, the UE obtains the measurement gap configuration so that in a configured measurement interval Perform all configured RRM measurements in the slot. In step 803, the UE performs RRM measurement according to the RRM measurement configuration and the measurement gap configuration.

Figure 9 shows an exemplary flow chart of allocating CSI-RS adjacent to an SS block for RRM measurement according to an embodiment of the present invention. In step 901, the UE obtains the RRM measurement configuration in the NR network, where the RRM measurement is performed on the SS block and the CSI-RS. In step 902, the UE obtains an RRM measurement gap configuration, where SS block and CSI-RS measurement are performed in one measurement gap. In step 903, the UE performs RRM measurement where the CSI-RS is adjacent to the SS block.

Figure 10 shows an exemplary flow chart of conditionally configuring CSI-RS for RRM measurement according to an embodiment of the present invention. In step 1001, the UE receives an RRM measurement configuration in the NR network, where the RRM measurement configuration includes a conditional measurement configuration for CSI-RS measurement. In step 1002, the UE performs RRM measurement in the CONNECTED state according to the received RRM measurement configuration. In step 1003, the UE sends a measurement report to the NR network, where the NR network determines a target cell for handover based on the measurement report.

Fig. 11 shows an exemplary flowchart of a UE conditionally decoding the time index of an SS block according to an embodiment of the present invention. In step 1101, the UE receives an RRM measurement configuration in the NR network, where the RRM measurement configuration configures at least one of SS measurement and CSI-RS measurement. In step 1102, the UE performs RRM measurement in the CONNECTED state according to the received RRM measurement configuration, where the UE only decodes the configured time index of the SS block when one or more time index trigger conditions are detected. In step 1103, the UE sends the measurement report to the NR network, where the NR network determines the target cell for handover based on the measurement report.

Although the present invention has been described in connection with certain specific embodiments for instructional purposes, the present invention is not limited thereto. Therefore, various modifications, adaptations and combinations of various features of the described embodiments can be practiced without departing from the scope of the present invention set forth in the scope of the patent application.

801-803‧‧‧Step

Claims (8)

A radio resource management measurement method includes: a user equipment (UE) receives a radio resource management (RRM) measurement configuration on a new radio (NR) network; wherein the RRM measurement configuration includes a channel state information reference signal (CSI- RS) conditional measurement configuration for measurement; the UE performs RRM measurement in the CONNECTED state according to the received RRM measurement configuration; and sends a measurement report to the NR network; among them, the one used for CSI-RS measurement The conditional measurement configuration is based on a plurality of trigger conditions, and the plurality of trigger conditions include: the measurement result of the beam management of the serving cell and the measurement result of the synchronization signal (SS) block. The method according to item 1 of the scope of patent application, wherein the RRM measurement configuration further includes: measurement configuration for synchronization signal (SS) block, report configuration, white list of candidate neighbor gNB and frequency priority list One or more configurations. The method according to claim 2, wherein the measurement configuration for the SS block includes at least one of the time to trigger the measurement configuration, the measurement gap configuration, and whether to measure the reference signal reception quality (RSRQ) configuration. The method according to item 1 of the scope of patent application, wherein the measurement report includes a cell identifier and a measurement result. A radio resource management measurement method, which includes: user equipment (UE) receiving radio resources on a new radio (NR) network Management (RRM) measurement configuration; wherein the RRM measurement configuration configures at least one of synchronization signal (SS) measurement and channel state information reference signal (CSI-RS) measurement; the UE is configured according to the received RRM measurement configuration Perform RRM measurement in the CONNECTED state; wherein, when at least one of a plurality of time index trigger conditions is detected, the UE decodes the time index of the configured SS block; the plurality of time index trigger conditions include random connection Incoming channel (RACH) optimization is enabled, and neighbor (NBR) CSI-RS is configured and its channel quality is sufficient for RACH optimization; and a measurement report is sent to the NR network. The method according to claim 5, wherein the UE performing RRM measurement in the connected state according to the received RRM measurement configuration includes: the UE performs the SS block of the serving cell and one or more neighboring cells Perform RRM measurement to obtain SS block measurement. The method according to claim 5, wherein, when the CSI-RS is configured in the RRM measurement configuration, the UE performs CSI-RS measurement. A user equipment includes: a transceiver, which receives radio frequency (RF) signals from one or more base stations in a new radio network, and transmits RF signals to one or more base stations; receives radio resource management (RRM) measurement configuration; The RRM measurement configuration includes a conditional measurement configuration for channel state information reference signal (CSI-RS) measurement; the RRM measurement circuit is configured in the user equipment according to the received RRM measurement The RRM measurement is performed in the connected state; the RRM measurement report circuit sends a measurement report to the new radio network; wherein the conditional measurement configuration for CSI-RS measurement is based on a plurality of trigger conditions, and the plurality of trigger conditions Including: the measurement result of the beam management of the serving cell and the measurement result of the synchronization signal (SS) block.

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