CN113260066B

CN113260066B - Measurement configuration method and device of SSB

Info

Publication number: CN113260066B
Application number: CN202010085083.4A
Authority: CN
Inventors: 文鸣; 刘进华
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-02-10
Filing date: 2020-02-10
Publication date: 2022-11-11
Anticipated expiration: 2040-02-10
Also published as: WO2021160166A1; CN113260066A

Abstract

The embodiment of the invention discloses a method and equipment for measurement configuration of an SSB (service side bridge), which are used for solving the problem that the measurement configuration of the SSB in the related technology does not consider the characteristics of a mobile IAB node, so that the measurement period of the SSB is unreasonable easily. The method is executed by a mobile self-backhauled IAB node and comprises the following steps: determining a target SMTC; wherein the mobility characteristics of the target SMTC and the mobile IAB node are matched; measuring SSB from the target SMTC. The embodiment of the invention can configure reasonable SSB measurement configuration for the mobile IAB node so as to reduce the power consumption overhead of the mobile IAB node on the premise of meeting the measurement requirement of the mobile IAB node.

Description

Measurement configuration method and device of SSB

Technical Field

The embodiment of the invention relates to the field of communication, in particular to a measurement configuration method and equipment of a Synchronization Signal/Physical Broadcast Channel blocks (SSB).

Background

Whether independent deployment (SA) or non-independent deployment (NSA), a Mobile Terminal (MT) in an Integrated Access and Backhaul (IAB) node assumes a transmission period of 16 frames (160 ms) for the SSB when initial cell selection is performed. That is, the IAB-MT adopts a default SSB-based Measurement Timing configuration (SMTC) configuration (160 ms) to perform SSB Measurement on the IAB node that needs to access.

When the access is successful, the network side allocates an SMTC (including the SSB measurement period) to the IAB node according to the current channel quality. In the related art, the IAB node is assumed to be fixed when the SMTC is allocated, and the characteristics of the mobile IAB node are not considered, which easily causes the SSB measurement period to be unreasonable. Specific examples thereof include: for the mobile IAB node, if the configured SSB measurement period is too long, the time required for generating the measurement result will be long, and the mobile IAB node needs a long time to determine the target cell; however, if the configured SSB measurement period is too short, the mobile IAB node needs to perform measurement operations intensively, which may cause overhead of wireless system resources and increase power consumption of the IAB node.

Therefore, it is necessary to provide a measurement configuration scheme for SSBs to implement the measurement configuration optimization problem of the mobile IAB node SSB in the IAB scenario.

Disclosure of Invention

An object of the embodiments of the present invention is to provide a method and a device for measurement configuration of an SSB, so as to solve the problem that in the related art, measurement configuration of an SSB does not consider characteristics of a mobile IAB node, which easily causes an unreasonable measurement period of the SSB.

In a first aspect, a method for configuring measurement of an SSB is provided, where the method is performed by a mobile IAB node, and the method includes:

determining a target SMTC; wherein the mobility characteristics of the target SMTC and the mobile IAB node match;

measuring SSB from the target SMTC.

In a second aspect, a measurement configuration method for an SSB is provided, where the method is performed by a host IAB node, and the method includes:

sending an SSB, wherein the SSB is used for measuring by a mobile IAB node according to a target SMTC;

wherein the mobility characteristics of the target SMTC and the mobile IAB node are matched.

In a third aspect, a network device is provided, which includes:

a determination module for determining a target SMTC; wherein the target SMTC matches the mobility characteristics of the network device;

and the measurement module is used for measuring the SSB according to the target SMTC.

In a fourth aspect, a network device is provided, the network device comprising:

a sending module, configured to send an SSB, where the SSB is used for a mobile IAB node to perform measurement according to a target SMTC;

In a fifth aspect, a network device is provided, which comprises a processor, a memory and a computer program stored on the memory and operable on the processor, and when executed by the processor, the computer program implements the measurement configuration method of SSB according to any one of the first and second aspects.

In a sixth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements a measurement configuration method of an SSB according to any one of the first and second aspects.

In an embodiment of the invention, the mobile IAB node determines an SMTC that matches its mobility characteristics and measures the SSB based on the SMTC. The embodiment of the invention can configure reasonable SSB measurement configuration for the mobile IAB node so as to reduce the power consumption overhead of the mobile IAB node on the premise of meeting the measurement requirement of the mobile IAB node.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic flow diagram of a measurement configuration method of an SSB according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of an SMTC configuration and an SSB configuration according to an embodiment of the invention;

FIG. 3 is a schematic flow chart diagram of a measurement configuration method of an SSB according to another embodiment of the present invention;

FIG. 4 is a schematic block diagram of a network device according to one embodiment of the present invention;

FIG. 5 is a schematic block diagram of a network device according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a network device according to still another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application. "and/or" in various embodiments of the present specification means at least one of front and rear.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Long Term Evolution (LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD) System, a Universal Mobile Telecommunications System (UMTS) or Worldwide Interoperability for Microwave Access (WiMAX) communication System, a 5G System, or a New wireless (New Radio, NR) System, a self-return (Integrated Access and Backhaul, IAB) System, or a subsequent Evolution communication System.

In the embodiment of the present invention, the network device is a device deployed in a radio access network to provide a wireless communication function for a terminal device. The network device may be a mobile IAB node, an anchor IAB (IAB-donor) node, or a network device in a subsequent evolved communication system, etc., although the terms are not limited thereto.

Before describing the embodiments of the present invention, first, the core idea of the embodiments of the present invention is described. The embodiment of the invention provides a measurement configuration method (or called as SMTC (simple message transmission) configuration optimization) of an SSB (single service base) of a mobile IAB node in an IAB scene.

When a mobile IAB node needs to access an IAB network, if a network side allocates a new SMTC configuration to the mobile IAB node only according to channel quality, downlink synchronization, mobility measurement, power consumption overhead, and the like of the mobile IAB node may be affected to some extent. For example, when the IAB node moves, if the configured measurement period of the SMTC is long, the mobile IAB cannot find and determine the target cell in time. On the contrary, if the configured measurement period of the SMTC is too short, the IAB node needs to frequently measure the neighboring cells, resulting in a large resource overhead.

Embodiments of the present invention select an appropriate SMTC configuration for a mobile IAB node based on the mobility characteristics (e.g., mobility speed) of the mobile IAB node, i.e., an SMTC configuration that matches the mobility characteristics of the mobile IAB node. Therefore, the embodiment of the invention can select the SMTC configuration with lower power consumption and lower cost on the premise of meeting the measurement requirement of the mobile IAB node.

The following describes in detail a measurement configuration method for an SSB of a mobile IAB node according to embodiments of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a measurement configuration method 100 of an SSB, which may be performed by a mobile IAB node, in other words, the method may be performed by software or hardware installed in the mobile IAB node, and the method includes the following steps:

s102: a target SMTC is determined that matches the mobility characteristics of the mobile IAB node.

In this embodiment, the mobility characteristics of the mobile IAB node include at least one of the following for the mobile IAB node:

1) Moving speed (it may be that only the speed value does not include the moving direction, and the like hereinafter); for example, the real value of the moving speed is 60km/h.

2) A speed grade value corresponding to the moving speed; in this example, different moving speed intervals correspond to different speed level values, for example, a speed level value of 0 ≦ v <30 is 0; v <60 is greater than or equal to 30 and is equal to 1; etc., where v represents the mobile speed of the mobile IAB node and may be in km/h.

3) A change amount per unit time measured as at least one of: reference Signal Receiving Power (RSRP) of the SSB; channel State Information Reference Signals (RSRPs), CSI-RSs; path loss (Path loss).

In this example, RSRP of SSB per unit time; RSRP of the CSI-RS; the larger the variation of the path loss is, the larger the moving speed of the mobile IAB node is generally reflected; otherwise, the RSRP of the SSB in unit time; RSRP of the CSI-RS; the smaller the amount of change in path loss, the smaller the mobility speed of the mobile IAB node is reflected in general.

It should be noted that, the mobility characteristics of the (target) SMTC and the mobile IAB node mentioned in the embodiments of the present specification are matched, which is specifically reflected as follows: the higher the speed value of the mobile IAB node is (or the larger the SSB/CSI-RS RSRP or path loss change in unit time is), the shorter the measurement period configured by the SMTC is, the more frequent the measurement is, so as to meet the measurement requirement of the mobile IAB node as fast as possible; conversely, the lower the velocity value of the mobile IAB node (or the smaller the SSB/CSI-RS RSRP or path loss variation per unit time), the longer the measurement period of the SMTC configuration to save power consumption.

S104: SSB is measured according to the target SMTC.

The measurement configuration method of the SSB provided by the present invention may design a plurality of different SMTC configurations (for example, at least one of the SMTC measurement window period, the duration, and the time offset is different) for the mobile IAB node in advance, so that the mobile IAB node may determine a suitable SMTC configuration according to the mobility characteristics (for example, the mobility speed) thereof and also in combination with the current channel quality, that is, select a target SMTC matching the mobility characteristics, and the configuration mode may be the following two modes:

1) The mobile IAB node sends a measurement report of the mobility characteristics to a host IAB-donor node; when the IAB-donor node receives the measurement report, one or more SMTCs that match the mobile IAB node are selected based on its current mobility characteristics (e.g., mobility speed) and sent to the mobile IAB node. Thus, the determined target SMTC referred to in S102 is the target SMTC received from the IAB-donor node.

2) A Centralized Unit (CU) of an IAB-donor node pre-configures each mobile IAB node accessing the IAB network with one or more SMTCs, where each SMTC corresponds to a different mobility characteristic (e.g., a different range of mobility speeds). The mobile IAB node selects which SMTC to use for SSB measurements based on its own mobility characteristic (e.g., mobility speed) speed. Thus, the determination target SMTC mentioned in S102 selects an SMTC that matches the current mobility characteristic from among the plurality of SMTCs for the mobile IAB node.

In the measurement configuration method of the SSB provided in the embodiment of the present invention, the mobile IAB node determines the SMTC that matches the mobility characteristic thereof, and measures the SSB based on the SMTC. The embodiment of the invention can configure reasonable SSB measurement configuration for the mobile IAB node so as to reduce the power consumption overhead of the mobile IAB node on the premise of meeting the measurement requirement of the mobile IAB node.

Optionally, as an embodiment, before the embodiment 100 determines the target SMTC, the method further includes: sending a measurement report of the mobility characteristic; thus, the determination target SMTC mentioned in embodiment 100 includes: receiving the target SMTC; wherein the target SMTC is selected from a plurality of SMTCs by the host IAB-donor node according to the measurement report.

The target SMTC mentioned in the embodiments of the present specification may include one SMTC, or may include a plurality of SMTCs. In the case where the target SMTC comprises one SMTC, the mobile IAB node measures the SSB directly from the SMTC; alternatively, where the target SMTC comprises a plurality of SMTCs, the mobile IAB node selects one SMTC from the plurality of SMTCs and measures the SSB based on that SMTC.

In this embodiment, the measurement report may be sent periodically; and/or the measurement report is transmitted if a preset condition is satisfied.

The preset condition includes that the mobile IAB node satisfies at least one of the following conditions:

the moving speed is greater than the first speed;

the moving speed is less than the second speed;

the time length that the moving speed is greater than the first speed reaches a first time length;

the time length that the moving speed is less than the second speed reaches a second time length;

a variation in at least one of the following measured per unit time is greater than the first variation threshold: RSRP of the SSB; RSRP of the CSI-RS; path loss;

a variation in at least one of the following measured per unit time is smaller than the second variation threshold: RSRP of the SSB; RSRP of the CSI-RS; path loss;

wherein the first speed is greater than the second speed, and the first variance threshold is greater than the second variance threshold.

It should be noted that the preset condition mentioned in this embodiment includes that the moving speed of the mobile IAB node is greater than the first speed; less than the second speed, etc., which can be flexibly generalized to the last speed interval for the case that the moving speed is exactly equal to the first speed or exactly equal to the second speed; or the speed interval is summarized into the next speed interval, and the specific speed interval can be seen in the following table 1. Specifically, for example, the preset condition includes that the mobile speed of the mobile IAB node is greater than or equal to 60km/h or less than 30km/h; it is also possible that the mobile speed of the mobile IAB node is greater than 60km/h or less than or equal to 30km/h.

The sending of the measurement report of the mobility characteristic mentioned in this embodiment includes at least one of:

sending radio resource control, RRC, signaling, the RRC signaling including the measurement report;

and transmitting a Backhaul Adaptation Protocol (BAP) Control (Control) Protocol Data Unit (PDU), wherein the BAP Control PDU comprises the measurement report.

The receiving of the target SMTC mentioned in this embodiment includes at least one of:

receiving RRC signaling, the RRC signaling comprising the target SMTC;

receiving a BAP Control PDU, the BAP Control PDU comprising the target SMTC.

Optionally, as an embodiment, the determining the target SMTC in embodiment 100 includes: selecting a target SMTC from a plurality of SMTCs according to the movement characteristic; wherein the SMTCs are pre-configured by the IAB-donor node for the mobile IAB node.

The plurality of SMTCs mentioned in the above two embodiments correspond to a plurality of different SMTC measurement window parameters; wherein the (arbitrary) one of the SMTC measurement window parameters comprises an SMTC measurement window period, an SMTC measurement window time offset and a duration of the SMTC measurement window.

Any one of the SMTC measurement window parameters is related to at least one of the following parameters of the mobile IAB node, that is, at least one of an SMTC measurement window period, an SMTC measurement window time offset, and a duration of an SMTC measurement window included in the SMTC measurement window parameters (mainly, the SMTC measurement window period affects the remaining two parameters), and is related to at least one of the following:

1) The moving speed;

2) The speed grade value corresponding to the moving speed;

3) A change amount per unit time measured as at least one of: RSRP of the SSB; RSRP of the CSI-RS; path loss.

Before determining the target SMTC, the method of this embodiment further comprises at least one of:

receiving RRC signaling, the RRC signaling being used to configure the plurality of SMTCs for the mobile IAB node;

receiving a BAP Control PDU, the BAP Control PDU configured to configure the plurality of SMTCs for the mobile IAB node.

The SMTC configuration (or simply SMTC) mentioned in the above embodiments of the present invention will be described in detail below.

The SMTC is configured based on the measurement timing of the SSB, that is, a time window for measuring the SSB by the mobile IAB node or the terminal device side is configured. The SMTC configuration includes 2 variables, which are period and duration for configuring a measurement window (i.e., SMTC configuration measurement period in fig. 2) and a time offset, respectively; the latter is the measurement duration of the configured measurement window, see the length of the dashed box in fig. 2, i.e. the SMTC window.

The measurement period options for SMTC are: 5 milliseconds, 10 milliseconds, 20 milliseconds, 40 milliseconds, 80 milliseconds, and 160 milliseconds; the durations are 1 millisecond, 2 milliseconds, 3 milliseconds, 4 milliseconds and 5 milliseconds.

As can be seen from fig. 2, the configuration of SSB may be different from that of SMTC. In order to reduce some unnecessary measurements or reduce the energy consumption overhead of the terminal device, the measurement period of the SMTC is configured differently from the SSB according to the channel condition and the mobility characteristics of the mobile IAB node. For example, when the SSB period is 20ms, the IAB-donor node side may configure a measurement period of 40ms to the mobile IAB node according to the current channel quality and the mobility characteristics of the mobile IAB node, that is, avoid measuring the SSB too frequently, thereby reducing unnecessary measurements and reducing the energy consumption overhead of the mobile IAB node.

The specific configuration of SMTC in IAB is as follows:

the SMTC measurement window period may be: 5ms,10ms,20ms,40ms,80ms,160ms,320ms,640ms and 1280ms;

the SMTC measurement window time offset may be: [0, …, (number of subframes within SMTC measurement window period-1) ];

the duration of the SMTC measurement window may be: [1, …,5] subframe.

In embodiment 100, it is mentioned that the mobile IAB node may autonomously select an SMTC matching its mobility characteristic from a plurality of SMTCs according to its mobility characteristic, or the IAB-donor node side may configure an appropriate SMTC for the mobile IAB node according to the mobility characteristic of the mobile IAB node, and for detailed description, the following description will be described with reference to two specific implementation methods.

The method comprises the following steps: the mobile IAB node reports the measurement report of the mobile characteristic, and the IAB-donor gNB-CU configures SMTC for the mobile IAB node according to the mobile characteristic of the mobile IAB node, wherein the method comprises the following implementation steps:

1. the mobile IAB node reports a measurement report of the mobility characteristics to the IAB-donor gNB-CU.

a) The measurement report of the mobile characteristic of the mobile IAB node can be configured as a measurement object, and the measurement report of the mobile characteristic can be periodically triggered and reported; and/or

b) The measurement reporting of the mobility characteristic may be event triggered, the triggering condition comprising at least one of:

i. when the speed of the mobile IAB node exceeds a certain preset speed threshold value or is lower than a certain preset speed threshold value;

when the speed of the mobile IAB node exceeds or is lower than a certain preset speed threshold value, and the time exceeding or lower than the speed threshold value is more than T; wherein the speed threshold and T are either protocol (pre-) defined or network (pre-) configured. The added T is equal to a function of anti-jitter in this example, which can make the reporting of the measurement report of the mobile characteristic less frequent, so as to save power consumption.

The change in the SSB/CSI-RS RSRP (or path loss) measured by the MT of the mobile IAB node per unit time exceeds or falls below a predetermined change threshold. The variation in this example is already limited by the unit time, so that the effect of saving power consumption can be achieved without adding an additional T to prevent jitter.

c) The measurement report of the mobile characteristic includes at least one of the following:

i. the real speed value of the mobile IAB node;

speed class values for mobile IAB node mobile speed, i.e. each speed class value may comprise a range of speeds (the speed division rule is defined by the protocol (pre) or configured by the network (pre)); as an example, assuming that the mobile speed is 40km/h, a "speed level value" -1 may be carried in the measurement report of the mobile characteristics according to the corresponding speed level value list, see table 1.

TABLE 1

The amount of change in SSB/CSI-RS RSRP (or path loss) measured by the MT of the mobile IAB node per unit time. The speed of the change can reflect the speed of the IAB node. For example, if the MT of the mobile IAB node measures that the SSB/CSI-RS RSRP becomes smaller by x dB within 500ms, and the configured SMTC is configured in a slow change manner according to the SSB/CSI-RS RSRP, a measurement report containing "SSB/CSI-RS RSRP variation" is reported. After the CU receives the report, it can configure a new SMTC to implement the measurement matching the speed.

d) The reporting mode of the measurement report of the mobile characteristic comprises at least one of the following modes:

i. the mobile IAB node is sent to an IAB-donor gNB-CU through RRC signaling;

and ii, carrying the measurement report in a Backhaul Adaptation Protocol (BAP) Control (Control) Protocol Data Unit (PDU) and sending the measurement report to an IAB-donor gNB-CU.

And 2, the IAB-donor gNB-CU receives the measurement report of the mobile characteristic and selects one or more SMTC configurations matched with the mobile IAB node according to the measurement report of the mobile characteristic.

a) The configuration of the SMTC includes a period, a time offset timing, and a measurement duration.

b) And the IAB-donor CU selects an SMTC configuration which can meet the measurement requirement of the IAB node and has the lowest power consumption overhead from the selectable SMTC parameters (an SMTC configuration list) according to the measurement report of the mobile characteristic. In principle, the higher the speed value of the mobile IAB node (or the larger the SSB/CSI-RS RSRP or path loss change per unit time), the shorter the SMTC configured measurement period, i.e. the more frequent the measurement.

i. When the real speed value is displayed in the measurement report of the movement characteristic received by the IAB-donor CU, the SMTC configuration corresponding to the real speed value is selected according to the SMTC configuration list at the IAB-donor gNB-CU side, see table 2. As an example, configuration b is used when the velocity value carried in the received velocity report of the movement characteristics is "40".

TABLE 2

True velocity v (km/h)	SMTC configuration list
		0≤v<30	Configuration a
30≤v<60	Configuration b
		60≤v<100	Configuration c
……	……

And ii, when the speed grade value is displayed in the measurement report of the movement characteristic received by the CU of the IAB-donor, selecting the SMTC configuration corresponding to the speed grade value according to the SMTC configuration list at the side of the IAB-donor gNB-CU. As an example, referring to table 3, when the value carried in the received measurement report of the mobility characteristic is "0", configuration a is adopted.

TABLE 3

Speed grade value	SMTC configuration list
		0	Configuration a
1	Configuration b
		2	Configuration c
……	……

It should be noted that, in each of the above examples, the same speed range or speed level value may correspond to multiple SMTC configurations, and accordingly, the IAB-donor may send the matched multiple SMTC configurations to the mobile IAB node, and then the mobile IAB node autonomously selects one SMTC configuration.

In this embodiment, the SMTC configuration list may be a protocol (pre) definition or a network (pre) configuration.

And 3, the IAB-donor node sends the selected SMTC configuration to the mobile IAB node.

a) The mode of sending the SMTC configuration comprises at least one of the following modes:

i. directly sending to the mobile IAB node through RRC signaling;

and ii, the BAP Control PDU carries the SMTC configuration to be delivered to the mobile IAB node.

The second method comprises the following steps: the IAB-donor gNB-CU pre-configures one or more SMTCs to the mobile IAB node, and the IAB is self-selected according to its mobility characteristics.

And 1, the IAB-donor node pre-configures one or more SMTCs for the newly accessed mobile IAB node.

a) The configuration of the SMTC includes a period, a time offset timing, and a measurement duration. Depending on the speed range of the mobile IAB node, a CU may configure one or more SMTCs to accommodate different speed ranges.

b) Each SMTC configuration corresponds to a different set of speed ranges, or a different speed class value (assuming that the speed division rule is rule a, the division rule a is defined by a protocol (pre) or configured by a network (pre)); or the variation interval of the SSB/CSI-RS RSRP (or path loss) per unit time (see the second embodiment).

As an example, see table 4, the IAB-donor node may pre-configure a plurality of SMTCs to the mobile IAB node (see configurations a, b, c in table 4).

TABLE 4

It should be noted that the same speed range or speed rank value may correspond to a plurality of SMTC configurations, and accordingly, the mobile IAB node may autonomously select one SMTC configuration from the matched plurality of SMTC configurations.

It should be noted that, as a specific example, in the second method, the IAB-donor node may configure only one SMTC in advance for a newly accessed mobile IAB node, in this case, the mobility characteristic of the mobile IAB node is usually fixed and may be known in advance, for example, for a mobile IAB node carried by a vehicle on a highway, the mobility speed of the mobile IAB node is approximately within a range of 60 ≦ v <100, therefore, only one SMTC may be configured in advance for the mobile IAB node, and the mobile IAB node may perform the measurement operation of the SSB directly through the configuration of the SMTC.

The IAB-donor gNB-CU sends the preconfigured one or more SMTCs to the IAB node.

i. directly sending to the mobile IAB node through RRC signaling;

and ii, the BAP Control PDU carries the SMTC configuration to be delivered to the IAB node.

3. The mobile IAB node receives one or more SMTCs pre-configured by the IAB-donor node, and selects one (if only 1 is configured, the SMTC is directly used, and if a plurality of SMTCs are configured, 1 is selected) from the SMTCs according to the self 'movement characteristics' to carry out SSB measurement of the access IAB node.

a) "movement characteristics" include at least one of:

i. the true speed value of the mobile IAB node;

a speed rank value of the mobile IAB node;

the amount of change in SSB/CSI-RS RSRP (or path loss) measured by the MT of the mobile IAB node per unit time.

b) The mobile IAB node selection SMTC criteria are: the "rule a" in 1 is adopted to divide the movement characteristics of the mobile terminal, and the SMTC configuration in the corresponding section is selected. As an example, see Table 4, configuration b is selected, e.g., when the mobile IAB node has a mobile speed of 40 km/h.

To illustrate the measurement configuration method of SSB provided in the above embodiments of the present invention in detail, two specific embodiments will be described below.

The first embodiment is as follows:

1. the protocol configures a 'measurement report of mobility characteristics' reporting mechanism for the mobile IAB node.

a) Configuring a measurement report of the mobile characteristic as an event trigger, wherein the trigger conditions are as follows:

when the speed of the mobile IAB node exceeds a certain preset speed threshold value or is lower than a certain preset speed threshold value, and the time exceeding or lower than the threshold value is more than T; where the speed threshold and T are either protocol (pre) defined or network (pre) configured.

b) Configuring measurement reports of mobility characteristics includes: and the moving speed of the mobile IAB node corresponds to the speed grade value. The speed division rule is configured by the network, and the specific example refers to table 1 above.

c) The reporting mode of the measurement report configured with the mobile characteristic is as follows:

the mobile IAB node is sent to an IAB-donor gNB-CU through RRC signaling;

2. and the mobile IAB node reports the measurement report of the mobile characteristic to the IAB-donor gNB-CU under the condition that the trigger condition is met.

a) And after the mobile IAB node successfully accesses the network, keeping the mobile speed at 40km/h for a time greater than T, and triggering an event of 'measurement report of mobile characteristics'.

b) According to the corresponding speed class value list, see table 1, the reported measurement report of the mobility characteristics carries a "speed class value" -1.

And 3, the IAB-donor gNB-CU receives the measurement report of the mobile characteristic and selects 1 SMTC configuration matched with the IAB for the mobile IAB node.

b) And the IAB-donor CU selects a configuration which can meet the measurement requirement of the mobile IAB node and has the lowest power consumption and cost from the optional SMTC parameters (SMTC configuration list) according to the measurement report of the mobile characteristic. In principle, the higher the speed value of the mobile IAB node (or the larger the SSB/CSI-RS RSRP or path loss change per unit time), the shorter the SMTC configured measurement period, i.e. the more frequent the measurement.

i. The list of SMTC configurations on the IAB-donor gNB-CU side is shown in table 3 above, from which the SMTC configuration corresponding to the speed class value is selected. Since the value included in the received measurement report of the movement characteristic is "1", the configuration b is adopted.

And 4, the IAB-donor node sends the selected SMTC configuration b to the mobile IAB node.

a) The mode of sending the SMTC configuration is:

and directly sent to the mobile IAB node through RRC signaling.

Example two:

the IAB-donor node pre-configures a plurality of SMTCs for the newly accessed mobile IAB node.

a) The configuration of the SMTC includes a period, a time offset timing, and a measurement duration. Depending on the speed range of the mobile IAB node, a CU may configure one or more SMTCs for the same speed range.

b) Each SMTC configuration corresponds to a different amount of change (i.e., a different speed range) of the SSB RSRP, the partitioning rule is defined by a protocol, and specifically, as shown in the following table, the IAB-donor node configures 4 SMTCs in advance to the mobile IAB node (i.e., configures a, b, c, d)

TABLE 5

And 2, the IAB-donor gNB-CU sends the 4 preconfigured SMTCs to the mobile IAB node.

The mode of sending the SMTC configuration list by protocol configuration is as follows: the BAP Control PDU carries the SMTC configuration list and delivers the SMTC configuration list to the mobile IAB node.

3. The protocol predefines a "mobility characteristic" as the amount of change in the SSB RSRP measured by the MT of the mobile IAB node within 100 ms.

4. The value of the variance measured by the current mobile IAB is 3dB, then the mobile IAB selects configuration a from the 4 configurations.

It should be noted that, in the foregoing embodiments of the present disclosure, a mobile IAB node is taken as an example for description, and actually, the measurement configuration method for an SSB provided in each embodiment of the present disclosure may be equally applied to measurement configuration of an SSB of a mobile terminal in an IAB scenario, that is, the mobile IAB node in each embodiment is also applicable to measurement configuration of an SSB of a mobile terminal by replacing the mobile IAB node with a mobile terminal, so that descriptions of corresponding embodiments are appropriately omitted to avoid repetition.

The measurement configuration method of the SSB according to the embodiment of the present invention is described in detail above with reference to fig. 1. A measurement configuration method of an SSB according to another embodiment of the present invention will be described below with reference to fig. 3. It is to be understood that the interaction between the IAB-donor node and the mobile IAB node described from the IAB-donor node side is the same as that described in the mobile IAB node side in the method shown in fig. 1, and the related description is appropriately omitted to avoid redundancy.

Fig. 3 is a schematic flow chart of an implementation of a measurement configuration method of an SSB according to an embodiment of the present invention, which may be applied to an IAB-donor node side. As shown in fig. 3, the method 300 includes:

s302: sending an SSB, wherein the SSB is used for the mobile IAB node to measure according to the target SMTC; wherein the mobility characteristics of the target SMTC and the mobile IAB node match.

Optionally, as an embodiment, before the sending the SSB, the method further includes:

receiving a measurement report of the movement characteristic;

selecting the target SMTC from a plurality of SMTCs based on the measurement report;

and sending the target SMTC.

Optionally, as an embodiment, the plurality of SMTCs correspond to a plurality of different SMTC measurement window parameters;

one of the SMTC measurement window parameters includes a SMTC measurement window period, a SMTC measurement window time offset, and a duration of the SMTC measurement window.

Optionally, as an embodiment, the SMTC measurement window parameter is related to at least one of the following of the mobile IAB node:

the moving speed;

the speed grade value corresponding to the moving speed;

a change amount per unit time measured as at least one of: RSRP of the SSB; RSRP of the CSI-RS; path loss.

Optionally, as an embodiment, the mobility characteristic includes at least one of the following of the mobile IAB node:

the moving speed;

the speed grade value corresponding to the moving speed;

Alternatively, the processor may, as an embodiment,

the measurement report is periodically sent by the mobile IAB node; and/or

The measurement report is sent by the mobile IAB node if a preset condition is met.

Optionally, as an embodiment, the receiving the measurement report of the mobile characteristic includes at least one of:

receiving RRC signaling, the RRC signaling comprising the measurement report;

receiving a BAP Control PDU, wherein the BAP Control PDU comprises the measurement report.

Optionally, as an embodiment, the sending the target SMTC includes at least one of:

sending RRC signaling, the RRC signaling comprising the target SMTC;

and sending a BAP Control PDU, wherein the BAP Control PDU comprises the target SMTC.

Optionally, as an embodiment, before the sending the SSB, the method further includes at least one of:

sending RRC signaling, wherein the RRC signaling is used for configuring a plurality of SMTCs for the mobile IAB node;

sending a BAP Control PDU, wherein the BAP Control PDU is used for configuring a plurality of SMTCs for the mobile IAB node;

wherein the plurality of SMTCs are for the mobile IAB node to select the target SMTC from the plurality of SMTCs based on the mobility characteristic.

The measurement configuration method of the SSB according to the embodiment of the present invention is described in detail above with reference to fig. 1 to 3. A network device according to an embodiment of the present invention will be described in detail below with reference to fig. 4.

Fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present invention, where the network device corresponds to the mobile IAB node described in the foregoing embodiments, and as shown in fig. 4, the network device 400 includes:

a determining module 402, which may be configured to determine a target SMTC; wherein the target SMTC matches the mobility characteristics of the network device;

a measurement module 404 may be configured to measure SSBs according to the target SMTC.

Optionally, as an embodiment, the network device 400 further includes a sending module, which may be configured to send a measurement report of the mobility characteristic;

the determining module 402 determining the target SMTC comprises: receiving the target SMTC;

wherein the target SMTC is selected from a plurality of SMTCs by the host IAB-donor node according to the measurement report.

Optionally, as an embodiment, the determining module 402 may be configured to:

selecting a target SMTC from a plurality of SMTCs according to the movement characteristic;

wherein the SMTCs are pre-configured by the IAB-donor node for the mobile IAB node.

wherein one of the SMTC measurement window parameters comprises an SMTC measurement window period, an SMTC measurement window time offset, and a duration of the SMTC measurement window.

the moving speed;

the speed grade value corresponding to the moving speed;

a change amount per unit time measured as at least one of: reference signal received power, RSRP, of the SSB; RSRP of a channel state information reference signal (CSI-RS); the path loss.

the moving speed;

the speed grade value corresponding to the moving speed;

a change amount per unit time measured as at least one of: RSRP of the SSB; RSRP of the CSI-RS; the path loss.

Alternatively, the processor may, as an embodiment,

the measurement report is transmitted periodically; and/or

The measurement report is transmitted in case a preset condition is satisfied.

Optionally, as an embodiment, the preset condition includes that the mobile IAB node satisfies at least one of the following:

the moving speed is greater than the first speed;

the moving speed is less than the second speed;

the time length of the moving speed which is less than the second speed reaches a second time length;

the amount of change in at least one of the following measured per unit time is greater than the first change threshold: RSRP of the SSB; RSRP of the CSI-RS; path loss;

Optionally, as an embodiment, the sending the measurement report of the mobility characteristic includes at least one of:

transmitting radio resource control, RRC, signaling, the RRC signaling including the measurement report;

and sending a back transmission adaptation protocol BAP Control protocol data unit PDU, wherein the BAP Control PDU comprises the measurement report.

Optionally, as an embodiment, the receiving the target SMTC includes at least one of:

receiving RRC signaling, the RRC signaling comprising the target SMTC;

and receiving a BAP Control PDU, wherein the BAP Control PDU comprises the target SMTC.

Optionally, as an embodiment, the network device 400 further includes a receiving module, which may be configured to at least one of:

and receiving a BAP Control PDU, wherein the BAP Control PDU is used for configuring the SMTCs for the mobile IAB node.

The network device 400 according to the embodiment of the present invention may refer to the flow corresponding to the method 100 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the network device 400 are respectively for implementing the corresponding flow in the method 100 and achieving the same or equivalent technical effects, and for brevity, no further description is provided herein.

Fig. 5 is a schematic structural diagram of a network device according to an embodiment of the present invention, where the network device corresponds to the IAB-donor node described in the foregoing embodiments, and as shown in fig. 5, the network device 500 includes:

a sending module 502, configured to send an SSB, where the SSB is configured to perform measurement by a mobile IAB node according to a target SMTC;

Optionally, as an embodiment, the network device 500 further includes a receiving module, which may be configured to:

receiving a measurement report of the movement characteristic; selecting the target SMTC from a plurality of SMTCs based on the measurement report;

the sending module 502 may be further configured to send the target SMTC.

the moving speed;

a speed grade value corresponding to the moving speed;

the moving speed;

a speed grade value corresponding to the moving speed;

Alternatively, the processor may, as an embodiment,

the measurement report is periodically sent by the mobile IAB node; and/or

Optionally, as an embodiment, the receiving module receives the measurement report of the movement characteristic, where the reception report includes at least one of:

receiving RRC signaling, the RRC signaling comprising the measurement report;

Optionally, as an embodiment, the sending module 502 sends the target SMTC by at least one of:

sending RRC signaling, the RRC signaling comprising the target SMTC;

Optionally, as an embodiment, the sending module 502 may be further configured to:

The network device 500 according to the embodiment of the present invention may refer to the flow corresponding to the method 300 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions described above in the network device 500 are respectively for implementing the corresponding flow in the method 300, and can achieve the same or equivalent technical effects, and for brevity, no further description is provided herein.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts in the embodiments are referred to each other. For the apparatus embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.

Referring to fig. 6, fig. 6 is a structural diagram of a network device applied in the embodiment of the present invention, which can implement details of

method embodiments

100 and 300, and achieve the same effect. As shown in fig. 6, the network device 600 includes: a processor 601, a transceiver 602, a memory 603, and a bus interface, wherein:

in this embodiment of the present invention, the network device 600 further includes: a computer program stored in the memory 603 and executable on the processor 601, the computer program, when executed by the processor 601, implementing the steps of the

method embodiments

100 and 300.

In fig. 6, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 601 and various circuits of memory represented by memory 603 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 602 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The processor 601 is responsible for managing the bus architecture and general processing, and the memory 603 may store data used by the processor 601 in performing operations.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of any one of the

method embodiments

100 and 300, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for measurement configuration of SSB, the method being performed by a mobile self-backhauled IAB node, the method comprising:

determining a measurement timing configuration target SMTC based on a synchronization and system information block (SSB); wherein the mobility characteristics of the target SMTC and the mobile IAB node are matched;

according to the target SMTC measurement SSB, in the case that the target SMTC comprises a plurality of target SMTCs, the mobile IAB node selects one SMTC from the plurality of target SMTCs and measures SSB according to the selected SMTC;

the determining the target SMTC includes:

wherein the plurality of SMTCs are pre-configured for the mobile IAB node by the home IAB node.

2. The method of claim 1 wherein each SMTC of said plurality of SMTCs corresponds to a different mobility characteristic.

3. The method of claim 1 or 2, wherein the plurality of SMTCs correspond to a plurality of different SMTC measurement window parameters;

4. The method of claim 3 wherein the SMTC measurement window parameter is associated with at least one of the following for the mobile IAB node:

the moving speed;

the speed grade value corresponding to the moving speed;

5. The method according to claim 1 or 2, wherein the mobility characteristics comprise at least one of the following for the mobile IAB node:

the moving speed;

a speed grade value corresponding to the moving speed;

6. The method of claim 1, wherein prior to determining the target SMTC, the method further comprises at least one of:

7. A method of measurement configuration for SSB, the method being performed by a host IAB node, the method comprising:

the SSB is used for the mobile IAB node to measure according to the target SMTC, and when the target SMTC comprises a plurality of target SMTCs, the mobile IAB node selects one SMTC from the plurality of target SMTCs and measures according to the selected SMTC;

wherein the mobility characteristics of the target SMTC and the mobile IAB node are matched;

before the sending of the SSB, the method further includes at least one of:

8. The method of claim 7 wherein each SMTC of said plurality of SMTCs corresponds to a different mobility characteristic.

9. The method of claim 7 or 8, wherein the plurality of SMTCs correspond to a plurality of different SMTC measurement window parameters;

10. The method of claim 9 wherein the SMTC measurement window parameter is related to at least one of the following for the mobile IAB node:

the moving speed;

the speed grade value corresponding to the moving speed;

11. The method according to claim 7 or 8, wherein the mobility characteristics comprise at least one of the following for the mobile IAB node:

the moving speed;

the speed grade value corresponding to the moving speed;

12. A network device, comprising:

a measurement module, configured to measure SSB according to the target SMTC, and if there are multiple target SMTCs, the mobile IAB node selects one SMTC from the multiple target SMTCs, and measures SSB according to the selected SMTC;

the determining module is used for selecting a target SMTC from a plurality of SMTCs according to the movement characteristics;

13. A network device, comprising:

a sending module, configured to send an SSB, where the SSB is configured to perform measurement by a mobile IAB node according to a target SMTC, and when the target SMTC includes multiple target SMTCs, the mobile IAB node selects one SMTC from the multiple target SMTCs and performs measurement according to the selected SMTC;

the sending module is further configured to at least one of:

14. A network device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, implements the measurement configuration method of an SSB according to any of claims 1 to 11.

15. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements the measurement configuration method of an SSB according to any of claims 1 to 11.