CN117397306A

CN117397306A - Configuration or use method, device, equipment and medium of maximum MIMO layer number

Info

Publication number: CN117397306A
Application number: CN202180098732.7A
Authority: CN
Inventors: 李海涛; 胡奕
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2024-01-12
Also published as: WO2023015418A1

Abstract

The application discloses a configuration method, a use method, a device, equipment and a storage medium of the maximum MIMO layer number, and relates to the field of wireless communication. The method comprises the following steps: the access network equipment broadcasts system information, and the terminal receives the system information, wherein the system information comprises a first maximum MIMO layer number; and the terminal determines the maximum MIMO layer number used in the service cell according to the first maximum MIMO layer number. According to the method and the device, under the condition that the energy-saving requirement of the base station is considered, the number of antenna ports of the base station is reduced, and then the maximum MIMO layer number of a plurality of UE is updated by using system information, so that the problems of long time consumption and high cost in an independent RRC reconfiguration process are avoided.

Description

Configuration or use method, device, equipment and medium of maximum MIMO layer number

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method, an apparatus, a device, and a medium for configuring or using a maximum MIMO layer number.

Background

The New air interface (NR) system considers the energy saving enhancement of the terminal. For terminals with power saving requirements, the base station may refer to the maximum number of Multiple-Input Multiple-Output (MIMO) layers proposed by the terminal. For example, the parameter maxMIMO-Layers-r16 in the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) configuration on the current bandwidth Part (Band Width Part, BWP) is reconfigured by radio resource control (Radio Resource Control, RRC).

Disclosure of Invention

The embodiment of the application provides a configuration method, a use method, a device, equipment and a medium for the maximum MIMO layer number, which can provide a configuration scheme for the maximum MIMO layer number of a plurality of terminals under the condition of considering energy saving enhancement of a base station. The technical scheme is as follows:

according to an aspect of the present application, there is provided a method for configuring a maximum MIMO layer number, the method including:

the access network device broadcasts system information including a first maximum MIMO layer number.

According to an aspect of the present application, there is provided a method for using a maximum MIMO layer number, the method including:

the terminal receives system information, wherein the system information comprises a first maximum MIMO layer number;

and the terminal determines the maximum MIMO layer number used in the service cell according to the first maximum MIMO layer number.

According to another aspect of the present application, there is provided a configuration apparatus for a maximum MIMO layer number, the apparatus including:

and the sending module is used for broadcasting system information, wherein the system information comprises a first maximum MIMO layer number.

According to an aspect of the present application, there is provided a device for using a maximum MIMO layer number, the device including:

the receiving module is used for receiving system information, wherein the system information comprises a first maximum MIMO layer number;

And the determining module is used for determining the maximum MIMO layer number used in the service cell according to the first maximum MIMO layer number.

According to another aspect of the embodiments of the present application, there is provided a terminal, where the apparatus includes a processor and a memory, where the memory stores a computer program, and the processor executes the computer program to implement the method for using the maximum MIMO layer number.

According to another aspect of the embodiments of the present application, there is provided an access network device, where the access network device includes a processor and a memory, where the memory stores a computer program, and the processor executes the computer program to implement the method for configuring the maximum MIMO layer number.

According to another aspect of the embodiments of the present application, there is provided a computer readable storage medium having stored therein a computer program for execution by a processor to implement the above-described method of using the maximum MIMO layer number or the method of configuring the maximum MIMO layer number.

According to another aspect of the embodiments of the present application, there is provided a chip, where the chip includes programmable logic circuits and/or program instructions, and when the chip is run on a computer device, the chip is configured to implement the method for using the maximum MIMO layer number or the method for configuring the maximum MIMO layer number according to the above aspect.

According to another aspect of the present application, there is provided a computer program product or a computer program, the computer program product or computer program comprising computer instructions stored in a computer readable storage medium, from which a processor reads and executes the computer instructions, causing a computer device to execute the method of using the maximum MIMO layer number or the method of configuring the maximum MIMO layer number according to the above aspect.

The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:

under the scene of considering energy saving enhancement of the base station, if the number of antenna ports of the base station is increased or reduced, the maximum MIMO layer numbers of the plurality of UEs are configured in batches through the system information, so that the problems of long time consumption and high cost in the independent RRC reconfiguration process of the plurality of UEs are avoided.

Drawings

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

FIG. 1 is a schematic diagram of a network architecture provided by an exemplary embodiment of the present application;

fig. 2 is a flowchart of a method for configuring a maximum MIMO layer number according to an exemplary embodiment of the present application;

fig. 3 is a flowchart of a method for configuring a maximum MIMO layer number according to an exemplary embodiment of the present application;

FIG. 4 is a schematic diagram of a system information update period provided by an exemplary embodiment of the present application;

fig. 5 is a schematic diagram of a first broadcasting manner of a maximum MIMO layer number according to an exemplary embodiment of the present application;

fig. 6 is a schematic diagram of a second broadcasting manner of the maximum MIMO layer number according to an exemplary embodiment of the present application;

fig. 7 is a schematic diagram of a third broadcasting manner of the maximum MIMO layer number according to an exemplary embodiment of the present application;

fig. 8 is a flowchart of a method for using the maximum MIMO layer number according to an exemplary embodiment of the present application;

fig. 9 is a flowchart of a method for using the maximum MIMO layer number according to an exemplary embodiment of the present application;

fig. 10 is a flowchart of a method for using the maximum MIMO layer number according to an exemplary embodiment of the present application;

FIG. 11 is a block diagram of a configuration apparatus for a maximum MIMO layer number provided by an exemplary embodiment of the present application;

Fig. 12 is a block diagram of an apparatus for using the maximum MIMO layer number provided in an exemplary embodiment;

fig. 13 is a block diagram of a communication device provided in an exemplary embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that, although the terms first, second, etc. may be used in this disclosure to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, a first parameter may also be referred to as a second parameter, and similarly, a second parameter may also be referred to as a first parameter, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.

Fig. 1 shows a schematic architecture diagram of a communication system 100 according to an embodiment of the present application. The communication system 100 may include: a terminal 10, an access network device 20 and a core network device 30.

The terminal 10 may refer to a UE (User Equipment), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a wireless communication device, a User agent, or a User Equipment. Alternatively, the terminal may also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol ) phone, a WLL (Wireless Local Loop, wireless local loop) station, a PDA (Personal digital Assistant), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in 5GS or a terminal in a future evolved PLMN (public Land mobile Network), etc., which the embodiments of the present application are not limited to. The number of terminals 10 is typically plural and one or more terminals 10 may be distributed within the cell managed by each access network device 20. In this application, the terminals 10 are classified into two types of first terminals and second terminals. The maximum transmit power of the second terminal is greater than the maximum transmit power of the first terminal.

The access network device 20 is a device deployed in an access network for providing wireless communication functionality for the terminal 10. The access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. The names of access network device-capable devices may vary in systems employing different radio access technologies, for example in 5G NR systems, called gndeb or gNB. As communication technology evolves, the name "access network device" may change. For convenience of description, in the embodiments of the present application, the above-mentioned devices for providing the terminal 10 with a wireless communication function are collectively referred to as an access network device. Alternatively, a communication relationship may be established between the terminal 10 and the core network device 30 via the access network device 20. Illustratively, in a long term evolution (Long Term Evolution, LTE) system, the access network device 20 may be EUTRAN (Evolved Universal Terrestrial Radio Access Network, evolved universal terrestrial radio network) or one or more enodebs in EUTRAN; in a 5G NR (5G New Radio) system, access network device 20 may be a RAN (Radio Access Network ) or one or more gnbs in the RAN.

The core network device 30 mainly functions to provide user connection, management of users, and bearer completion of services, and to provide an interface to an external network as a bearer network. For example, the core network device in the 5G NR system may include devices such as an AMF entity, a UPF (User Plane Function ) entity, and an SMF (Session Management Function ) entity.

In one example, access network device 20 and core network device 30 communicate with each other over some air technology, such as the NG interface in a 5G NR system. The access network device 20 and the terminal 10 communicate with each other via some over-the-air technology, e.g. Uu interface.

Fig. 2 is a flowchart illustrating a method for configuring a maximum MIMO layer number according to an exemplary embodiment of the present application. The present embodiment is illustrated with the method being performed by an access network device. The method comprises the following steps:

step 202: the access network device broadcasts system information (System Information, SI) including a first maximum MIMO layer number.

Taking the access network equipment as a base station as an example, under the condition of considering the energy conservation of the base station, the purpose of energy conservation can be achieved by reducing the number of antenna ports of the base station. However, changing the number of antenna ports of the base station affects the maximum MIMO layer number of the terminal in the connected state. If RRC is used to reconfigure the maximum MIMO layer number of each terminal or downlink control information (Downlink Controllnformation, DCI) is used to control each terminal to perform BWP handover, huge overhead is incurred and time is consumed.

In this embodiment, when the number of antenna ports of the access network device is changed, the access network device broadcasts system information, where the system information includes a first maximum MIMO layer number.

Optionally, the access network device sets the first maximum MIMO layer number according to the (own) energy saving situation. For example, under the condition that energy conservation is required, setting a first maximum MIMO layer number according to the reduced number of antenna ports; for another example, the first maximum MIMO layer number is set according to the increased number of antenna ports without requiring energy saving.

In an exemplary case, when the average rate of a plurality of terminals in the serving cell is smaller than a threshold, the access network device reduces the number of antenna ports on the access network device side from a first number to a second number; setting a first maximum MIMO layer number supported by the serving cell according to the number of the second number of antenna ports; under the condition that the average speed of a plurality of terminals in a service cell is larger than a threshold value, the access network equipment increases the number of antenna ports at the access network equipment side from a second number to a first number; and setting a first maximum MIMO layer number supported by the serving cell according to the first number of antenna ports.

The first maximum MIMO layer number is provided to a plurality of terminals in a serving cell. Illustratively, the first maximum MIMO layer number is provided to a plurality of terminals or all terminals in a connected state in the serving cell.

Wherein the connection state is one of RRC states of the terminal. Illustratively, the RRC states of the terminal include three: dormant state (rrc_idle), CONNECTED state (rrc_connected), INACTIVE state (rrc_inactive).

Wherein the first maximum MIMO layer number includes: a first maximum number of downlink MIMO layers; and/or, the first uplink maximum MIMO layer number.

Illustratively, the system information includes a plurality of system information blocks (System Information Block, SIBs), such as SIB1 through SIB14. The first maximum MIMO layer number is carried in a target SIB, which may be SIB1 or SIB X, which is an integer greater than 1.

In summary, in the method provided in this embodiment, in a scenario of considering energy saving enhancement of a base station, if the number of antenna ports of the base station is increased or decreased, the maximum MIMO layer numbers of multiple UEs are configured in batches through system information, so that the problems of long time consumption and high overhead in performing an independent RRC reconfiguration process on multiple UEs are avoided.

Fig. 3 is a flowchart illustrating a method for configuring a maximum MIMO layer number according to an exemplary embodiment of the present application. The present embodiment is illustrated with the method being performed by an access network device. The method comprises the following steps:

step 201: the access network equipment sends a change instruction;

The access network device sends a change indication to each terminal (in a connected state), where the change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated. The first maximum MIMO layer number is the maximum MIMO layer number currently supported by the serving cell.

Step 202: the access network device broadcasts system information including a first maximum MIMO layer number.

In case the change indication indicates that the maximum MIMO layer number has been updated, the access network device broadcasts system information, the system information comprising the first maximum MIMO layer number.

The concept of a system information update period is used in the related art. As shown in fig. 4, when the access network device is to update the system information, the access network device repeatedly transmits the system information change instruction (black block in the figure) in the nth system information update period, and then repeatedly transmits the updated system information (diagonal line block in the figure) in the (n+1) th system information update period. The boundary of the system information update period is defined as SFN satisfying SFN mod m=0, where SFN is a system frame number and m is the number of SFNs contained in one system information update period. Illustratively, m=modifiationperiodic paycycle.

The modification periodic paging cycle and the default paging cycle are respectively a system information update cycle coefficient and a default paging cycle, and the 2 parameters are all determined through broadcasting of access network equipment.

The system information change instruction is carried in a Short Message (Short Message). Illustratively, the system information includes a plurality of system information blocks (System Information Block, SIBs), such as SIB1 through SIB14. The system information update period is applicable to the update of system information other than SIB6, SIB7, SIB8, and positioning assistance data. Namely:

if the system information change indication (systemInfoModification) in the short message has a value of 1, which indicates that other system information except for SIB6/SIB7/SIB8 needs to be updated, the terminal acquires the updated system information in the next system information update period.

Based on the system information update period shown in fig. 4, there are at least two different implementation manners in this embodiment:

first way (conventional change instruction):

the access network equipment sends a short message and a target SIB, wherein the short message carries a system information change instruction which is used for indicating that SIB update exists in the system information; the target SIB is the SIB carrying the first maximum MIMO layer number.

Taking the SIB1 as an example, sending a first version of short message and SIB1 by access network equipment, wherein the short message carries a system information change instruction which is used for indicating that SIB update exists in the system information; SIB1 is the SIB carrying the first maximum MIMO layer number.

The first version of the short message is also referred to as a conventional version of the short message, such as the short message defined by the R16 version of the communication protocol. The short message carries a system information change indication. When the value of the system information change instruction is 1, the system information is updated; when the value of the system information change instruction is 0, the system information is not updated.

For energy saving, if the number of antenna ports currently supported by the access network device changes, for example, a part of antenna ports enter an inactive state, the access network device generates the latest first maximum MIMO layer number.

As shown in fig. 5, the access network device sends a first version of short message in a system information update period n, where the system information change indication in the short message is 1, which represents that SIB is updated. The access network device sends SIB1 in a system information updating period n+1, wherein the SIB1 carries the latest first maximum MIMO layer number.

Taking the SIB X as an example, the access network equipment sends a first version of short message and SIB1 and SIBX, wherein the short message carries a system information change indication which is used for indicating that SIB update exists in the system information; the Value Tag (Value Tag) corresponding to SIB X in SIB1 is used to indicate that SIB X is an SIB carrying the first maximum MIMO layer number is updated. X is an integer greater than 1, such as x=2 or 3 or 4 or 5, and the present embodiment is not limited to any possible value of X.

In contrast to the first approach, the first maximum MIMO layer number is carried at SIB X instead of SIB1.

As shown in fig. 6, the access network device sends a first version of short message in a system information update period n, where the system information change indication in the short message is 1, which represents that SIB is updated. The access network device transmits SIB1 and SIBX in a system information update period n+1. The SIB1 carries a value tag corresponding to a different SIB. Such as a value tag corresponding to SIB2, for indicating whether SIB2 is updated; a value tag corresponding to SIB3 for indicating whether SIB3 is updated; and a value tag corresponding to SIB4 for indicating whether SIB4 is updated.

Wherein, the value tag corresponding to SIB X indicates that SIBX is updated, and SIB X is an SIB carrying the first maximum MIMO layer number.

Second mode (modified change instruction):

the access network equipment sends a short message and a target SIB, wherein the short message carries a maximum MIMO layer number change indication. The target SIB carries a first maximum MIMO layer number. The target SIB is SIB1 or SIB X.

For example, the access network device sends a short message of the second version, where the short message carries a maximum MIMO layer number change indication, where the maximum MIMO layer number change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated;

the second version of the short message, also referred to as a new version of the short message, is a short message defined by a communication protocol, such as the R17 version, updated based on the first version of the short message. The short message carries a maximum MIMO layer number change indication. The maximum MIMO layer number change indication is obtained by multiplexing reserved bits in the first version of the short message. That is, the maximum MIMO layer number change in the second version of the short message indicates the reserved bits in the corresponding first version of the short message.

As shown in fig. 7, the access network device sends a second version of short message in the system information update period n, where the maximum MIMO layer number change indication in the short message is 1, and the update occurs on the target SIB carrying the first maximum MIMO layer number. Because the SIB is repeatedly transmitted in the same system information updating period n, the access network device carries the latest first maximum MIMO layer number in the target SIB which is subsequently transmitted in the system information updating period n. In this way, the terminal re-reads the target SIB in the system information update period n, and the latest first maximum MIMO layer number can be obtained. Alternatively, the target SIB may be SIB1 or SIB X.

In summary, according to the method provided by the embodiment, the access network device broadcasts the change indication first and broadcasts the SIB carrying the first maximum MIMO layer number, so that the terminal can be triggered to acquire the updated first maximum MIMO layer number in time, and timeliness of information acquisition is maintained.

According to the method provided by the embodiment, through the first mode and the second mode, the system information change instruction in the related technology can be used as far as possible, and the change notification of the first maximum MIMO layer number can be realized without improving the system information change instruction, so that the modification of the communication protocol can be reduced, and the compatibility of the terminal using the traditional communication protocol is improved.

According to the method provided by the embodiment, through the third mode, the notification of the change of the first maximum MIMO layer number is realized by using the reserved bit of the short message in the related technology, the issuing or notification of the first maximum MIMO layer number can be completed in the same system information updating period n, the time consumption when issuing the first maximum MIMO layer number to a plurality of terminals is further shortened, and the timeliness of information acquisition is maintained.

Fig. 8 is a flowchart illustrating a method for using the maximum MIMO layer number according to an exemplary embodiment of the present application. The present embodiment is illustrated with the method being performed by a terminal. The method comprises the following steps:

Step 402: the terminal receives system information, wherein the system information comprises a first maximum MIMO layer number;

and the terminal in the connection state receives the system information broadcast by the access network equipment, wherein the system information comprises a first maximum MIMO layer number. Illustratively, the system information includes a plurality of SIBs, such as SIB1 to SIB14. The first maximum MIMO layer number is carried in a target SIB, which may be SIB1 or SIB X, which is an integer greater than 1.

The first maximum MIMO layer number is a maximum MIMO layer number currently supported by the serving cell. The first maximum MIMO layer number is provided to a plurality of terminals in a serving cell. Illustratively, the first maximum MIMO layer number is provided to a plurality of terminals or all terminals in a connected state in the serving cell.

Step 404: and the terminal determines the maximum MIMO layer number used in the service cell according to the first maximum MIMO layer number.

In summary, according to the method provided in the embodiment, the terminal obtains the first maximum MIMO layer number through the system information, and then determines the maximum MIMO layer number used in the serving cell through the first maximum MIMO layer number in the system information, so that batch configuration of the maximum MIMO layer number of the plurality of UEs can be implemented, and the problems of long time consumption and high cost in performing an independent RRC reconfiguration process on the plurality of UEs are avoided.

Fig. 9 is a flowchart illustrating a method for using the maximum MIMO layer number according to an exemplary embodiment of the present application. The present embodiment is illustrated with the method being performed by a terminal. The method comprises the following steps:

step 400: the terminal receives a change instruction;

the change indication is used to indicate whether the first maximum MIMO layer number in the system information has been updated. The first maximum MIMO layer number is the maximum MIMO layer number currently supported by the serving cell.

and receiving system information broadcasted by the access network equipment by the terminal in a connected state under the condition that the change indication is used for indicating that the maximum MIMO layer number is updated, wherein the system information comprises the first maximum MIMO layer number. Illustratively, the system information includes a plurality of SIBs, such as SIB1 to SIB14. The first maximum MIMO layer number is carried in a target SIB, which may be SIB1 or SIB X, which is an integer greater than 1.

Based on the system information update period shown in fig. 4, there are at least two different implementations of this embodiment:

the first way is: (conventional change instruction):

the terminal receives a short message, wherein the short message carries a system information change instruction; and receiving a target SIB, wherein the target SIB is the SIB carrying the first maximum MIMO layer number, when the system information change indication is used for indicating that SIB updating exists in the system information.

Taking the SIB1 as an example, the terminal receives a short message of a first version and the SIB1, wherein the short message carries a system information change instruction which is used for indicating that SIB update exists in the system information; SIB1 is the SIB carrying the first maximum MIMO layer number.

As shown in fig. 5, the terminal receives a short message of the first version in the system information update period n, where the system information change indication in the short message is 1, which represents that SIB update occurs. The terminal receives SIB1 in a system information updating period n+1, wherein the SIB1 carries the latest first maximum MIMO layer number.

Taking the SIB X as an example, the terminal receives a short message of a first version, wherein the short message carries a system information change instruction; and when the system information change indication is used for indicating that SIB (information block) update exists in the system information, the terminal receives SIB1, and a value tag corresponding to SIB X in the SIB1 is used for indicating that SIB X is updated, wherein SIB X is the SIB carrying the first maximum MIMO layer number. X is an integer greater than 1, such as x=2 or 3 or 4 or 5, and the present embodiment is not limited to any possible value of X.

As shown in fig. 6, the terminal receives a short message of the first version in the system information update period n, where the system information change indication in the short message is 1, which represents that SIB update occurs. The terminal receives SIB1 first in a system information update period n+1. The SIB1 carries a value tag corresponding to a different SIB. Such as a value tag corresponding to SIB2, for indicating whether SIB2 is updated; a value tag corresponding to SIB3 for indicating whether SIB3 is updated; and a value tag corresponding to SIB4 for indicating whether SIB4 is updated.

And when the value label corresponding to the SIB X indicates that the SIBX is updated, the terminal receives the SIB X in a system information updating period, wherein the SIB X is the SIB carrying the first maximum MIMO layer number.

Second mode (modified change instruction):

For example: the terminal receives a short message of a second version, wherein the short message carries a maximum MIMO layer number changing indication, and the maximum MIMO layer number changing indication is used for indicating whether the first maximum MIMO layer number in the system information is updated or not.

The second version of the short message, also referred to as a new version of the short message, is a short message defined by the communication protocol, such as the R17 version and subsequent versions, updated based on the first version of the short message. The short message carries a maximum MIMO layer number change indication. The maximum MIMO layer number change indication is obtained by multiplexing reserved bits in the first version of the short message. That is, the maximum MIMO layer number change in the second version of the short message indicates the reserved bits in the corresponding first version of the short message.

As shown in fig. 7, the terminal receives a short message of the second version in the system information update period n, where the maximum MIMO layer number change indication in the short message is 1, and the update occurs on the target SIB carrying the first maximum MIMO layer number. Since the SIBs are repeatedly transmitted in the same system information update period n, the target SIB subsequently transmitted in the system information update period n carries the latest first maximum MIMO layer number. In this way, the terminal re-reads the target SIB in the system information update period n, and the latest first maximum MIMO layer number can be obtained. Alternatively, the target SIB may be SIB1 or SIB X.

Fig. 10 is a flowchart illustrating a method for using the maximum MIMO layer number according to an exemplary embodiment of the present application. The present embodiment is illustrated with the method being performed by a terminal. The method comprises the following steps:

the process of receiving the system information by the terminal may refer to step 402 in fig. 8 or steps 400 to 402 in fig. 9, which will not be described again.

Step 404: the terminal determines the maximum MIMO layer number used in the service cell according to the first maximum MIMO layer number and the second maximum MIMO layer number;

the second maximum MIMO layer number is the maximum MIMO layer number configured for the serving cell through the dedicated signaling. The proprietary signaling refers to signaling configured with granularity of a terminal or a terminal group, and the proprietary signaling may be RRC or DCI. Typically, this second maximum MIMO layer number is configured by the access network device to the terminal through RRC-specific signaling prior to step 402.

In this case, the terminal will have two maximum MIMO layers simultaneously, from proprietary signaling and system information, respectively. The present step can be implemented as either of the following two steps:

determining a smaller value of the first maximum MIMO layer number and the second maximum MIMO layer number as the maximum MIMO layer number used in the serving cell;

in the case where the first maximum MIMO layer number is configured and the second maximum MIMO layer number is not configured, the first maximum MIMO layer number is determined as the maximum MIMO layer number used in the serving cell.

Obviously, in the case where the first maximum MIMO layer number is not configured and the second maximum MIMO layer number is configured, the second maximum MIMO layer number is determined as the maximum MIMO layer number used in the serving cell.

Step 406: and the terminal determines the maximum MIMO layer number used on the target BWP in the service cell according to the maximum MIMO layer number used in the service cell and the third maximum MIMO layer number.

This step is an optional step. Since the maximum MIMO layer number is BWP-related, the terminal may be further configured with a third maximum MIMO layer number for the target BWP.

The third maximum MIMO layer number is a maximum MIMO layer number configured for the target BWP through the dedicated signaling. The proprietary signaling refers to signaling configured with granularity of a terminal or a terminal group, and the proprietary signaling may be RRC or DCI. Typically, this third maximum MIMO layer number is configured by the access network device to the terminal through RRC-specific signaling prior to step 406.

In this case, the terminal may have two maximum MIMO layers simultaneously, corresponding to the serving cell (determined by step 404) and the target BWP, respectively. The present step can be implemented as either of the following two steps:

determining a smaller value of the maximum MIMO layer number and the third maximum MIMO layer number used in the serving cell as the maximum MIMO layer number used on the target BWP in the serving cell;

When the third maximum MIMO layer number is not configured, the maximum MIMO layer number used in the serving cell is determined as the maximum MIMO layer number used on the target BWP in the serving cell.

In summary, in the method provided in this embodiment, when the terminal has two maximum MIMO layers at the same time, and the two maximum MIMO layers are respectively from the proprietary signaling and the system information, the minimum value of the first maximum MIMO layer and the second maximum MIMO layer can ensure that after the maximum MIMO layer of the access network device is updated, the terminal does not use the maximum MIMO layer that exceeds the maximum MIMO layer supported by the network device, so as to ensure the MIMO transmission success rate of the terminal and the access network device on the granularity of the serving cell.

Similarly, when the terminal has two maximum MIMO layers simultaneously and corresponds to the serving cell and the target BWP respectively, the maximum MIMO layer number used by the target BWP is ensured not to exceed the maximum MIMO layer number supported by the serving cell, and the MIMO transmission success rate of the terminal and the access network device on the BWP granularity is ensured.

Fig. 11 is a block diagram of a configuration apparatus for a maximum MIMO layer number according to an exemplary embodiment of the present application. The device comprises:

a sending module 1120, configured to broadcast system information, where the system information includes a first maximum MIMO layer number.

A setting module 1140 is configured to set the first maximum MIMO layer number according to an energy saving situation.

In an optional design of this embodiment, a module 1140 is configured to reduce the number of antenna ports on the access network device side from the first number to the second number if an average rate of a plurality of terminals in the serving cell is less than a threshold; setting a first maximum MIMO layer number supported by the serving cell according to the number of the second number of antenna ports; a setting module 1140, configured to raise the number of antenna ports on the access network device side from the second number to the first number if the average rate of the plurality of terminals in the serving cell is greater than a threshold; and setting a first maximum MIMO layer number supported by the serving cell according to the first number of antenna ports.

In an optional design of the present embodiment, the first maximum MIMO layer number includes: a first maximum number of downlink MIMO layers; and/or, the first uplink maximum MIMO layer number.

In an optional design of this embodiment, the sending module 1120 is further configured to send a change indication, where the change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated.

In an optional design of this embodiment, the sending module 1120 is further configured to send a short message and a target SIB, where the short message carries a system information change indication, where the system information change indication is used to indicate that SIB update exists in the system information; the target SIB is a SIB carrying the first maximum MIMO layer number.

In an optional design of this embodiment, the sending module 1120 is further configured to send a short message and a target SIB, where the short message carries a maximum MIMO layer number change indication, where the maximum MIMO layer number change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated.

In an optional design of this embodiment, the broadcasting mode of the first maximum MIMO layer number may be any one of the following three modes:

in a first manner, the sending module 1120 is configured to send a first version of short message and SIB1, where the short message carries a system information change indication, where the system information change indication is used to indicate that SIB update exists in the system information; the SIB1 is an SIB carrying the first maximum MIMO layer number;

in a second manner, the sending module 1120 is configured to send a first version of short message, and SIB1 and SIBx, where the short message carries a system information change indication, where the system information change indication is used to indicate that SIB update exists in the system information; the value tag corresponding to the SIB X in the SIB1 is used for indicating the SIB X to be updated, wherein the SIB X is the SIB carrying the first maximum MIMO layer number;

In a third manner, the sending module 1120 is configured to send a second version of short message, where the short message carries a maximum MIMO layer number change indication, where the maximum MIMO layer number change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated;

wherein the maximum MIMO layer number change in the second version of short message indicates a reserved bit in the short message corresponding to the first version.

Wherein, the sending module 1120 is further configured to perform any sending step in the embodiments of fig. 2 and 3, and the setting module 1140 is further configured to perform any non-sending step in the embodiments of fig. 2 and 3.

In summary, in the device provided in this embodiment, the terminal may be triggered to acquire the updated first maximum MIMO layer number in time by broadcasting the change indication first and broadcasting the SIB carrying the first maximum MIMO layer number, so as to maintain timeliness of information acquisition.

The device provided in this embodiment, through the first mode and the second mode, can use the system information change instruction in the related art as far as possible, and can implement the change notification of the first maximum MIMO layer number without improving the system information change instruction, so that modification to the communication protocol can be reduced, and compatibility to the terminal using the conventional communication protocol can be improved.

According to the device provided by the embodiment, through the third mode, the notification of the change of the first maximum MIMO layer number is realized by using the reserved bit of the short message in the related technology, the issuing or the notification of the first maximum MIMO layer number can be completed in the same system information updating period n, the time consumption when issuing the first maximum MIMO layer number to a plurality of terminals is further shortened, and the timeliness of information acquisition is maintained.

Fig. 12 is a block diagram of an apparatus for using the maximum MIMO layer number according to an exemplary embodiment of the present application. The device comprises:

a receiving module 1220, configured to receive system information, where the system information includes a first maximum MIMO layer number;

a determining module 1240, configured to determine a maximum MIMO layer number used in the serving cell according to the first maximum MIMO layer number.

In an optional design of the embodiment, the receiving module 1220 is configured to receive a change indication, where the change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated.

In an optional design of the embodiment, the receiving module 1220 is configured to receive a short message, where the short message carries a system information change instruction; and receiving the target SIB when the system information change indication is used for indicating that a System Information Block (SIB) is updated in the system information, wherein the target SIB is the SIB carrying the first maximum MIMO layer number.

In an optional design of this embodiment, the receiving module 1220 is configured to receive a short message, where the short message carries a maximum MIMO layer number change indication, where the maximum MIMO layer number change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated.

In an optional design of this embodiment, the broadcast receiving manner of the first maximum MIMO layer number may be any one of the following three manners:

in a first manner, the receiving module 1220 is configured to receive a short message of a first version, where the short message carries a system information change instruction; receiving SIB1 when the system information change indication is used for indicating that SIB update exists in the system information, wherein the SIB1 is the SIB carrying the first maximum MIMO layer number;

In a second manner, the receiving module 1220 is configured to receive a short message of the first version, where the short message carries a system information change instruction; receiving SIB1 when the system information change indication is used for indicating that SIB (information block) update exists in the system information, wherein a value tag corresponding to SIB X in the SIB1 is used for indicating that SIB X is updated, and the SIB X is the SIB carrying the first maximum MIMO layer number;

in a third manner, the receiving module 1220 is configured to receive a second version of a short message, where the short message carries a maximum MIMO layer number change indication, where the maximum MIMO layer number change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated;

In an optional design of this embodiment, the determining module 1240 is configured to determine a maximum MIMO layer number used in the serving cell according to the first maximum MIMO layer number and the second maximum MIMO layer number;

the second maximum MIMO layer number is configured for the service cell through the special signaling.

In an optional design of this embodiment, the determining module 1240 is configured to determine a smaller value of the first maximum MIMO layer number and the second maximum MIMO layer number as the maximum MIMO layer number used in the serving cell; or, the determining module is configured to determine, when the first maximum MIMO layer number is configured and the second maximum MIMO layer number is not configured, that the first maximum MIMO layer number is a maximum MIMO layer number used in the serving cell.

In an optional design of this embodiment, the determining module 1240 is configured to determine, according to the maximum MIMO layer number and the third maximum MIMO layer number used in the serving cell, the maximum MIMO layer number used on the target BWP in the serving cell;

wherein the third maximum MIMO layer number is a maximum MIMO layer number configured for the target BWP through proprietary signaling.

In an optional design of this embodiment, the determining module 1240 is configured to determine a smaller value of the maximum MIMO layer number used in the serving cell and the third maximum MIMO layer number as the maximum MIMO layer number used on the target BWP in the serving cell; or, the determining module is configured to determine, when the third maximum MIMO layer number is not configured, a maximum MIMO layer number used in the serving cell, and determine the maximum MIMO layer number used on the target BWP in the serving cell.

The receiving module 1220 is further configured to perform any receiving step in the embodiment of fig. 8 or 9 or 10, and the determining module 1240 is further configured to perform any non-receiving step in the embodiment of fig. 8 or 9 or 10.

In summary, the device provided in this embodiment obtains the first maximum MIMO layer number through the system information, and then determines the maximum MIMO layer number used in the serving cell through the first maximum MIMO layer number in the system information, so that batch configuration of the maximum MIMO layer number of the plurality of UEs can be implemented, and the problems of long time consumption and high cost in performing an independent RRC reconfiguration process on the plurality of UEs are avoided.

According to the device provided by the embodiment, under the condition that two maximum MIMO layers are simultaneously available and come from proprietary signaling and system information respectively, the minimum value of the first maximum MIMO layer number and the second maximum MIMO layer number can be used for guaranteeing that after the maximum MIMO layer number of the access network equipment is updated, the terminal does not use the maximum MIMO layer number which exceeds the maximum MIMO layer number supported by the network equipment, and the MIMO transmission success rate of the terminal and the access network equipment on the granularity of a service cell is guaranteed.

According to the device provided by the embodiment, under the condition that two maximum MIMO layers are simultaneously arranged and correspond to the service cell and the target BWP respectively, the maximum MIMO layer number used by the target BWP is ensured not to exceed the maximum MIMO layer number supported by the service cell, and the MIMO transmission success rate of the terminal and the access network equipment on the BWP granularity is ensured.

Fig. 13 shows a schematic structural diagram of a communication device (terminal or access network device) according to an exemplary embodiment of the present application, where the communication device 1300 includes: a processor 1301, a receiver 1302, a transmitter 1303, a memory 1304, and a bus 1305.

Processor 1301 includes one or more processing cores, and processor 1301 executes various functional applications and information processing by running software programs and modules.

The receiver 1302 and the transmitter 1303 may be implemented as one communication component, which may be a communication chip.

The memory 1304 is coupled to the processor 1301 by a bus 1305.

The memory 1304 may be used for storing at least one instruction that the processor 1301 is configured to execute to implement the various steps in the method embodiments described above. For example, the relevant steps of the method for using the maximum MIMO layer are performed, or the relevant configuration of the parameter configuration method is performed.

Further, the memory 1104 may be implemented by any type or combination of volatile or nonvolatile memory devices including, but not limited to: magnetic or optical disks, electrically erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EEPROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), static random access Memory (Static Random Access Memory, SRAM), read-Only Memory (ROM), magnetic Memory, flash Memory, programmable Read-Only Memory (Programmable Read-Only Memory, PROM).

In an exemplary embodiment, there is also provided a computer readable storage medium having stored therein at least one instruction, at least one program, a code set, or an instruction set, where the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the use method for executing the maximum MIMO layer number by a communication device or the configuration method for the maximum MIMO layer number provided by the foregoing respective method embodiments.

In an exemplary embodiment, a chip is provided, where the chip includes programmable logic circuits and/or program instructions, and when the chip is running on a communication device, the chip is configured to implement the use method of the maximum MIMO layer number, or the configuration method of the maximum MIMO layer number.

In an exemplary embodiment, a computer program product is also provided, which, when run on a processor of a computer device, causes the communication device to perform the above-described method of using the maximum number of MIMO layers, or the above-described method of configuring the maximum number of MIMO layers.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.

Claims

A method for using a maximum MIMO layer number, the method comprising:

the terminal receives system information, wherein the system information comprises a first maximum MIMO layer number;

and the terminal determines the maximum MIMO layer number used in the service cell according to the first maximum MIMO layer number.
The method of claim 1, wherein the first maximum number of MIMO layers comprises:

a first maximum number of downlink MIMO layers;

and/or the number of the groups of groups,

and the first uplink maximum MIMO layer number.
The method according to claim 2, wherein the method further comprises:

the terminal receives a change instruction, wherein the change instruction is used for indicating whether the first maximum MIMO layer number in the system information is updated.
A method according to claim 3, wherein the terminal receives a change indication, comprising:

receiving a short message, wherein the short message carries a system information change instruction;

And receiving the target SIB when the system information change indication is used for indicating that a System Information Block (SIB) is updated in the system information, wherein the target SIB is the SIB carrying the first maximum MIMO layer number.
The method of claim 4, wherein the receiving a short message carries a system information change indication; receiving the target SIB when the system information change indication is used for indicating that a system information block SIB is updated in the system information, including:

receiving a short message of a first version, wherein the short message carries a system information change instruction; receiving SIB1 when the system information change indication is used for indicating that a system information block SIB is updated in the system information, wherein the SIB1 is the SIB carrying the first maximum MIMO layer number;

or alternatively, the first and second heat exchangers may be,

receiving a short message of a first version, wherein the short message carries a system information change instruction; and receiving SIB1 when the system information change indication is used for indicating that SIB update exists in the system information, wherein a value tag corresponding to SIB X in the SIB1 is used for indicating that SIB X is updated, the SIB X is an SIB carrying the first maximum MIMO layer number, and X is an integer larger than 1.
A method according to claim 3, wherein the terminal receives a change indication, comprising:

receiving a short message, wherein the short message carries a maximum MIMO layer number changing instruction, and the maximum MIMO layer number changing instruction is used for indicating whether the first maximum MIMO layer number in the system information is updated or not.
The method of claim 6, wherein the receiving the short message comprises:

and receiving a short message of a second version, wherein the maximum MIMO layer number change indication in the short message of the second version corresponds to a reserved bit in the short message of the first version.
The method according to any one of claims 1 to 7, wherein the determining, by the terminal, the maximum MIMO layer number used in the serving cell according to the first maximum MIMO layer number, includes:

determining the maximum MIMO layer number used in the service cell according to the first maximum MIMO layer number and the second maximum MIMO layer number;

the second maximum MIMO layer number is configured for the service cell through the special signaling.
The method of claim 8, wherein the determining the maximum number of MIMO layers used in the serving cell based on the first maximum number of MIMO layers and the second maximum number of MIMO layers comprises:

Determining a smaller value of the first maximum MIMO layer number and the second maximum MIMO layer number as a maximum MIMO layer number used in the serving cell;

or alternatively, the first and second heat exchangers may be,

and determining the first maximum MIMO layer number as the maximum MIMO layer number used in the service cell when the first maximum MIMO layer number is configured and the second maximum MIMO layer number is not configured.
The method according to claim 9, wherein the method further comprises:

determining the maximum MIMO layer number used on the target bandwidth part BWP in the service cell according to the maximum MIMO layer number and the third maximum MIMO layer number used in the service cell;

wherein the third maximum MIMO layer number is a maximum MIMO layer number configured for the target BWP through proprietary signaling.
The method of claim 10, wherein the determining the maximum number of MIMO layers used based on the maximum number of MIMO layers used in the serving cell and the third maximum number of MIMO layers comprises:

determining a smaller value of the maximum MIMO layer number used in the serving cell and the third maximum MIMO layer number as the maximum MIMO layer number used on the target BWP in the serving cell;

Or alternatively, the first and second heat exchangers may be,

and if the third maximum MIMO layer number is not configured, determining the maximum MIMO layer number used in the serving cell as the maximum MIMO layer number used on the target BWP in the serving cell.
A method for configuring a maximum MIMO layer number, the method comprising:

the access network device broadcasts system information including a first maximum MIMO layer number.
The method according to claim 12, wherein the method further comprises:

the access network equipment sets the first maximum MIMO layer number according to the energy saving condition.
The method of claim 13, wherein the first maximum number of MIMO layers comprises:

a first maximum number of downlink MIMO layers;

and/or the number of the groups of groups,

and the first uplink maximum MIMO layer number.
The method according to any one of claims 9 to 11, further comprising:

the access network device sends a change instruction, wherein the change instruction is used for indicating whether the first maximum MIMO layer number in the system information is updated.
The method of claim 15, wherein the access network device sends a change indication comprising:

Transmitting a short message and a target System Information Block (SIB), wherein the short message carries a system information change instruction which is used for indicating that SIB update exists in the system information; the target SIB is a SIB carrying the first maximum MIMO layer number.
The method of claim 16, wherein the sending the short message and the target SIB comprises:

transmitting a short message of a first version and a system information block SIB1, wherein the SIB1 is an SIB carrying the first maximum MIMO layer number;

or alternatively, the first and second heat exchangers may be,

sending a short message of a first version and SIB1 and SIBx; and the value tag corresponding to the SIB X in the SIB1 is used for indicating the SIB X to be updated, wherein the SIB X is the SIB carrying the first maximum MIMO layer number, and the X is an integer larger than 1.
The method of claim 15, wherein the access network device sends a change indication comprising:

and sending a short message, wherein the short message carries a maximum MIMO layer number changing instruction, and the maximum MIMO layer number changing instruction is used for indicating whether the first maximum MIMO layer number in the system information is updated or not.
The method of claim 18, wherein the sending the short message comprises:

And sending a short message of a second version, wherein the maximum MIMO layer number change indication in the short message of the second version corresponds to a reserved bit in the short message of the first version.
An apparatus for using a maximum MIMO layer number, the apparatus comprising:

the receiving module is used for receiving system information, wherein the system information comprises a first maximum MIMO layer number;

and the determining module is used for determining the maximum MIMO layer number used in the service cell according to the first maximum MIMO layer number.
The apparatus of claim 20, wherein the first maximum number of MIMO layers comprises:

a first maximum number of downlink MIMO layers;

and/or the number of the groups of groups,

and the first uplink maximum MIMO layer number.
The apparatus of claim 21, wherein the device comprises a plurality of sensors,

the receiving module is configured to receive a change indication, where the change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated.
The apparatus of claim 22, wherein the device comprises a plurality of sensors,

the receiving module is used for receiving a short message, and the short message carries a system information change instruction; and receiving the target SIB when the system information change indication is used for indicating that a System Information Block (SIB) is updated in the system information, wherein the target SIB is the SIB carrying the first maximum MIMO layer number.
The apparatus of claim 23, wherein the device comprises a plurality of sensors,

the receiving module is used for receiving the short message of the first version, wherein the short message carries a system information change instruction; receiving SIB1 when the system information change indication is used for indicating that a system information block SIB is updated in the system information, wherein the SIB1 is the SIB carrying the first maximum MIMO layer number;

or alternatively, the first and second heat exchangers may be,

the receiving module is used for receiving the short message of the first version, wherein the short message carries a system information change instruction; and receiving SIB1 when the system information change indication is used for indicating that SIB update exists in the system information, wherein a value tag corresponding to SIB X in the SIB1 is used for indicating that SIB X is updated, the SIB X is an SIB carrying the first maximum MIMO layer number, and X is an integer larger than 1.
The apparatus of claim 22, wherein the device comprises a plurality of sensors,

the receiving module is configured to receive a short message, where the short message carries a maximum MIMO layer number change indication, and the maximum MIMO layer number change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated.
The apparatus of claim 25, wherein the device comprises a plurality of sensors,

the receiving module is configured to receive a second version of short message, where the maximum MIMO layer number change indication in the second version of short message corresponds to a reserved bit in the first version of short message.
The apparatus according to any one of claims 20 to 26, wherein,

the determining module is configured to determine a maximum MIMO layer number used in the serving cell according to the first maximum MIMO layer number and the second maximum MIMO layer number;

the second maximum MIMO layer number is configured for the service cell through the special signaling.
The apparatus of claim 18, wherein the device comprises a plurality of sensors,

the determining module is configured to determine a smaller value of the first maximum MIMO layer number and the second maximum MIMO layer number as a maximum MIMO layer number used in the serving cell;

or alternatively, the first and second heat exchangers may be,

the determining module is configured to determine, when the first maximum MIMO layer number is configured and the second maximum MIMO layer number is not configured, that the first maximum MIMO layer number is a maximum MIMO layer number used in the serving cell.
The apparatus of claim 28, wherein the device comprises a plurality of sensors,

The determining module is configured to determine, according to the maximum MIMO layer number and the third maximum MIMO layer number used in the serving cell, the maximum MIMO layer number used on the target bandwidth portion BWP in the serving cell;

wherein the third maximum MIMO layer number is a maximum MIMO layer number configured for the target BWP through proprietary signaling.
The apparatus of claim 29, wherein the device comprises a plurality of sensors,

the determining module is configured to determine, as a maximum MIMO layer number used on the target BWP in the serving cell, a smaller value of the maximum MIMO layer number used in the serving cell and the third maximum MIMO layer number;

or alternatively, the first and second heat exchangers may be,

the determining module is configured to determine, when the third maximum MIMO layer number is not configured, a maximum MIMO layer number used in the serving cell, and determine the maximum MIMO layer number used on the target BWP in the serving cell.
A configuration apparatus for a maximum MIMO layer number, the apparatus comprising:

and the sending module is used for broadcasting system information, wherein the system information comprises a first maximum MIMO layer number.
The apparatus of claim 31, wherein the apparatus further comprises:

And the setting module is used for setting the first maximum MIMO layer number according to the energy saving condition.
The apparatus of claim 32, wherein the first maximum number of MIMO layers comprises:

a first maximum number of downlink MIMO layers;

and/or the number of the groups of groups,

and the first uplink maximum MIMO layer number.
The apparatus according to any one of claims 31 to 33, wherein the sending module is further configured to send a change indication, where the change indication is used to indicate whether the first maximum MIMO layer number in the system information has been updated.
The apparatus of claim 34, wherein the device comprises a plurality of sensors,

the sending module is used for sending a short message and a target System Information Block (SIB), wherein the short message carries a system information change instruction which is used for indicating that SIB update exists in the system information; the target SIB is a SIB carrying the first maximum MIMO layer number.
The apparatus of claim 35, wherein the device comprises a plurality of sensors,

the sending module is used for sending the short message of the first version and the system information block SIB1; the SIB1 is an SIB carrying the first maximum MIMO layer number;

or alternatively, the first and second heat exchangers may be,

the sending module is configured to send a short message of a first version and SIB1 and SIBx, where a value tag corresponding to SIB X in SIB1 is used to indicate that SIB X is updated, SIB X is an SIB carrying the first maximum MIMO layer number, and X is an integer greater than 1.
The apparatus of claim 34, wherein the device comprises a plurality of sensors,

the sending module is configured to send a short message, where the short message carries a maximum MIMO layer number change indication, and the maximum MIMO layer number change indication is used to indicate whether the first maximum MIMO layer number in the system information is updated.
The apparatus of claim 37, wherein the device comprises a plurality of sensors,

the sending module is configured to send a second version of short message, where the maximum MIMO layer number change indication in the second version of short message corresponds to a reserved bit in the first version of short message.
A terminal, the terminal comprising: a processor and a memory, wherein at least one section of program is stored in the memory; the processor is configured to execute the at least one program in the memory to implement the method for using the maximum MIMO layer number according to any one of claims 1 to 11.
An access network device, the access network device comprising: a processor and a memory, wherein at least one section of program is stored in the memory; the processor is configured to execute the at least one program in the memory to implement the method for configuring the maximum MIMO layer number according to any one of claims 12 to 19.
A computer readable storage medium having stored therein executable instructions that are loaded and executed by a processor to implement the method of configuring a maximum MIMO layer number according to any one of claims 1 to 11 or the method of using a maximum MIMO layer number according to any one of claims 12 to 19.
A chip, characterized in that the chip comprises a programmable logic circuit or a program, and the chip is configured to implement a method for configuring a maximum MIMO layer number according to any one of claims 1 to 11 or a method for using a maximum MIMO layer number according to any one of claims 12 to 19.