WO2018213974A1

WO2018213974A1 - Method and device for receiving system information

Info

Publication number: WO2018213974A1
Application number: PCT/CN2017/085302
Authority: WO
Inventors: 陈冬明; 何朗; 吴环宇; 陈雍珏
Original assignee: 华为技术有限公司
Priority date: 2017-05-22
Filing date: 2017-05-22
Publication date: 2018-11-29
Also published as: CN110651517B; CN110651517A

Abstract

A method and device for receiving system information, for use in resolving the problems in the prior art of increased resource overhead for releasing a BL/CE UE in a connected state due to the fact that an E-UTRAN needs to release the BL/CE UE when the BL/CE UE needs to receive a changed SIBs message, and increased signaling overhead and power consumption overhead for the BL/CE UE to re-access the network. The method comprises: a terminal receives downlink control information (DCI) sent by a base station, wherein the terminal is in a connected state, and the DCI carries scheduling information of a changed system message; the terminal determines, according to the scheduling information of the changed system message, a resource occupied when the changed system message is sent; and the terminal finds, on the resource, the changed system message sent by the base station.

Description

System information receiving method and device

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a system information receiving method and device.

Background technique

Machine to Machine (M2M) is a common application form in the Internet of Things (IOT). The 3rd Generation Partnership Project (3GPP) introduced Machine Type Communications (MTC) technology and Enhanced evolved Machine Type Communications (eMTC) technology to reduce the number of Internet of Things terminals. Cost, 3GPP R13 introduces a low-cost user equipment (UE), eMTC UE, which includes UEs and coverage enhancement (CE) of The Bandwidth reduced Low Complexity (BL). The UEs are BL/CE UEs.

The 3GPP R13 protocol stipulates that a BL/CE UE can only schedule one transport block at each Transmission Timing Interval (TTI), that is, a broadcast transport block and a data transport block cannot simultaneously receive, paging messages and system information. The System Information Block (SIBs) message belongs to the broadcast transport block, so the connected state BL/CE UE cannot receive the paging message and the SIBs message. When the SIBs message is changed and the connected state BL/CE UE needs to receive the changed SIBs message, the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) needs to actively release the BL/CE UE to make the BL/CE. The UE is in an idle state in which the paging message and the changed SIBs message can be received. The foregoing process causes the E-UTRAN to increase the resource overhead of releasing the BL/CE UE, and the UE also increases the processing resource overhead and power loss due to the need to re-access the network.

In summary, when the connected state BL/CE UE needs to receive the changed SIBs message, the E-UTRAN needs to release the BL/CE UE, increase the resource overhead of releasing the BL/CE UE, and increase the BL/CE UE re-access. The problem of signaling overhead and power consumption overhead of the network.

Summary of the invention

An embodiment of the present application provides a system information receiving method and device, which are used to solve the problem that when a connected state BL/CE UE exists in the prior art that needs to receive a changed SIBs message, the E-UTRAN needs to release the BL/CE UE. The resource overhead of releasing the BL/CE UE is increased, and the signaling overhead and power consumption overhead of the BL/CE UE re-accessing the network are also increased.

In a first aspect, the present application provides a system information receiving method, including: receiving, by a terminal, downlink control information (DCI) sent by a base station, where the terminal is in a connected state, and the DCI carries scheduling information of the changed system message; Determining, by the terminal, the resources that are occupied when the changed system message is delivered, according to the scheduling information of the changed system message, where the terminal searches for the change sent by the base station on the resource System message.

In the embodiment of the present application, the connected terminal determines, by using the received DCI, the resource occupied by the changed system message, and after the base station sends the changed system message to the terminal, the terminal is on the resource. The changed system message is found. In this process, the E-UTRAN does not need to release the UE, so that the UE is in an idle state. The resource overhead of releasing the UE is reduced by the foregoing method, and the signaling overhead and power consumption overhead of the UE re-accessing the network are also reduced.

In a possible design, the DCI further carries a scrambling code; the method further includes: the terminal passing the The scrambling code identifies that the DCI is a DCI carrying scheduling information of the changed system message.

In the embodiment of the present application, by identifying the scrambling code, the DCI is more quickly identified as the DCI carrying the scheduling information of the changed system message, and the type of the DCI is identified in advance.

In one possible design, the format of the DCI and the meaning of each bit in the DCI are pre-configured, and the bit of the DCI is at least 34 bits.

In a possible design, the format of the DCI may also be a multiplexing of the existing Format6-1A format.

In a second aspect, the present application provides a system information receiving method, including: a base station sends downlink control information DCI to a terminal, where the terminal is in a connected state, and the DCI carries scheduling information of a changed system message; The base station occupies the resources required for the system message to be sent when the changed system message is sent on the terminal according to the scheduling information of the changed system message; the base station sends the changed system message to the resource of the terminal. .

In the embodiment of the present application, the base station sends the DCI that carries the scheduling information of the changed system message to the terminal in the connected state, and occupies the resource to be occupied when the changed system message is delivered, and the base station sends the changed system message to the terminal. Afterwards, the terminal searches for the changed system message on the resource. In this process, the E-UTRAN does not need to release the UE, so that the UE is in an idle state. The resource overhead of releasing the UE is reduced by the foregoing method, and the signaling overhead and power consumption overhead of the UE re-accessing the network are also reduced.

In a possible design, the DCI further carries a scrambling code; the method further includes: the base station notifying, by using the scrambling code, the DCI as the scheduling information carrying the changed system message by using the scrambling code DCI.

In a third aspect, the application provides a terminal, including: a receiving unit, configured to receive downlink control information (DCI) sent by a base station, where the terminal is in a connected state, and the DCI carries scheduling information of a changed system message. a processing unit, configured to determine, according to the scheduling information of the changed system message, a resource that is occupied when the changed system message is delivered; the processing unit is further configured to: find the The changed system message delivered by the base station.

In a possible design, the DCI also carries a scrambling code;

The processing unit is further configured to:

The DCI is identified by the scrambling code as a DCI carrying scheduling information of the changed system message.

In a fourth aspect, the present application provides a base station, including: a sending unit, configured to send downlink control information DCI to a terminal, where the terminal is in a connected state, and the DCI carries scheduling information of the changed system message; a unit, configured to: on the terminal, occupy, according to the scheduling information of the changed system message, a resource that is required to be sent by the changed system message; the sending unit is further configured to send the changed system message to On the resource of the terminal.

In this embodiment, the base station sends the DCI carrying the scheduling information of the changed system message to the terminal in the connected state. And occupying the resource to be occupied when the changed system message is delivered. After the base station sends the changed system message to the terminal, the terminal searches for the changed system message on the resource. In this process, E- The UTRAN does not need to release the UE, leaving the UE in an idle state. The resource overhead of releasing the UE is reduced by the foregoing method, and the signaling overhead and power consumption overhead of the UE re-accessing the network are also reduced.

In a possible design, the DCI also carries a scrambling code;

The processing unit is further configured to:

The DCI is informed by the scrambling code that the DCI is a DCI carrying scheduling information of the changed system message.

In a fifth aspect, the embodiment of the present application further provides a terminal, including: a transceiver, a processor, and a memory; the memory is configured to store a software program, and the processor is configured to read a software program stored in the memory, The data is transmitted and received by the transceiver, and the method provided by the first aspect or any one of the above first aspects is implemented. The terminal can be a mobile terminal, a computer, or the like.

In a sixth aspect, the embodiment of the present application further provides a base station, including: a transceiver, a processor, and a memory; the memory is configured to store a software program, and the processor is configured to read a software program stored in the memory, Transceiver data through the transceiver and implement the method provided by the second aspect or any one of the above second aspects.

In a seventh aspect, the embodiment of the present application further provides a computer storage medium, where the software program stores a software program, where the software program can be implemented by one or more processors and can implement the first aspect, the first Any of the aspects of the design or the second aspect, any one of the above second aspects of the design provided by the method.

DRAWINGS

FIG. 1 is a flowchart of a system information receiving method according to an embodiment of the present application;

2 is a flowchart of another system information receiving method according to an embodiment of the present application;

FIG. 3 is a flowchart of still another system receiving method according to an embodiment of the present application;

4 is a schematic diagram of a terminal according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a base station according to an embodiment of the present application;

FIG. 6 is a structural diagram of a terminal hardware according to an embodiment of the present application;

FIG. 7 is a structural diagram of a base station hardware according to an embodiment of the present application.

detailed description

The embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

Hereinafter, some of the terms in the present application will be explained to be understood by those skilled in the art.

A terminal, which may be referred to as a user equipment, a mobile station, a terminal device, or a mobile terminal, may communicate with one or more core network devices via a Radio Access Network (RAN). The terminal may be a mobile phone (or "cellular" phone) or a computer with a mobile terminal, etc., for example, the terminal may also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device. The terminal can also be an Internet of Things device, such as a watch terminal, a wearable device, a logistics tracker, an elevator picture or a satellite device. They exchange voice and/or data with the wireless access network.

Resources, which can include multiple types, such as: computing resources for providing computing power, for providing storage space Storage resources, network resources used to provide transport channels, and so on. The computing resource may be a central processing unit (CPU) resource, and the storage resource may be a memory resource.

The plurality referred to in the present application means two or more.

The embodiment of the present invention provides a system information receiving method and device, which are used to solve the problem that when a connected state BL/CE UE exists in the prior art to receive a changed SIBs message, the E-UTRAN needs to release the BL/CE UE, and the The resource overhead of the BL/CE UE is released, and the signaling overhead and power consumption overhead of the BL/CE UE re-accessing the network are also increased. The method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.

The embodiment of the present application provides a system information receiving method, as shown in FIG. 1 , including the following process:

S101: The terminal receives the downlink control information DCI sent by the base station, where the terminal is in a connected state, and the DCI carries scheduling information of the changed system message.

Specifically, the DCI is sent by using an enhanced device-like communication physical downlink control channel (MPDCCH). The MPDCCH search space is divided into a user-level search space USS and a common search space CSS, where the CSS includes a Type0 CSS, and the Type0 CSS is used for feedback, 3/3A, and user-level TPC control messages, and a user-level search space. The USS uses the same Narrowband (NB), Physical Resource Block (PRB) set and scrambling code. The connected state BL/CE UE only listens to the MPDCCH of both USS and Type0 CSS. In order to enable the connected state BL/CE UE to receive the change system message, the Type0 CSS function is enhanced, and the scheduling information of the update system message is directly carried by the DCI.

S102. The terminal determines, according to the scheduling information of the changed system message, a resource that is occupied when the changed system message is delivered.

S103. The terminal searches for the changed system message delivered by the base station on the resource.

In the embodiment of the present application, a system information receiving method is provided. The terminal in the connected state determines the resource occupied by the changed system message after receiving the DCI, and the base station sends the changed system message to the terminal. The terminal searches for the changed system message on the resource. In this process, the E-UTRAN does not need to release the UE, so that the UE is in an idle state. The resource overhead of releasing the UE is reduced by the foregoing method, and the signaling overhead and power consumption overhead of the UE re-accessing the network are also reduced.

In a possible implementation, the DCI further carries a scrambling code. The method further includes: the terminal identifying, by using the scrambling code, the DCI as a DCI carrying scheduling information of a changed system message. .

Specifically, the scrambling code may be an SI-RNTI, and the DCI is identified by the SI-RNTI as indicating system message scheduling information.

In a possible implementation manner, the format of the DCI and the meaning of each bit in the DCI are pre-configured, and the bit of the DCI is at least 34 bits.

For example, the format of the DIC is Format 6-X, which is used to indicate the scheduling information of the changed system message. The specific format is as shown in Table 1:

Table 1

Among them, the meaning of each bit is as follows:

Flag SIB1-BR/SI other than SIB1-BR differentiation(SIB1/other SI flag) - 1 bit, where the value "0" indicates SIB1-BR, and the value "1" indicates SI other than SIB1-BR.

If SIB1/other SI flag=0:

Scheduling Info SIB1-BR—5bit, System Information Block Type1-BR scheduling information, the same as the Scheduling Info SIB1-BR carried by the MIB.

If SIB1/other SI flag=1:

si-Narrowband—

Bit, the NB location where the SI message is located.

Hopping flag—1 bit, whether the SI message is frequency hopping, 0 means that SI frequency hopping is not supported, and 1 means that SI frequency hopping is supported.

Hopping NB-1bit, 0 means frequency hopping between 2NB, 1 means frequency hopping between 4NB

Hopping interval—2 bit, the frequency hopping time domain interval, which is consistent with the interval-DL Hopping Config Common ModeB parameter carried in the SIB1-BR.

Hopping Offset—3 bit, the frequency hopping frequency domain interval is consistent with the mpdcch-pdsch-Hopping Offset parameter carried in the SIB1-BR.

The si-TBS-3bit, the TBS of the SI message is consistent with the si-TBS parameter carried in the SIB1-BR.

si-Repetition Pattern—2bit, the repeat mode of the SI message, which is consistent with the si-Repetition Pattern parameter carried in the SIB1-BR.

si-Window Length-BR—3 bits, the length of the SI message window is the same as the si-Window Length-BR parameter carried in the SIB1-BR.

SIB-Type—4 bits, the SI message type, which is consistent with the SIB-Type parameter carried in the SIB1-BR.

DL Bitmap BR—10 bits, the bit mapping of the downlink available subframes, which is consistent with the first 10 bits of the fdd-Downlink Or Tdd Subframe Bitmap BR parameter carried in the SIB1-BR.

In the embodiment of the present application, the DCI format may also be a format of multiplexing the existing Format6-1A.

The embodiment of the present application provides a system information receiving method, as shown in FIG. 2, including the following process:

S201. The base station sends downlink control information DCI to the terminal, where the terminal is in a connected state, and the DCI carries scheduling information of the changed system message.

S202. The base station occupies the resources required when the changed system message is delivered on the terminal according to the scheduling information of the changed system message.

S203. The base station sends the changed system message to the resource of the terminal.

In the embodiment of the present application, the connection state terminal receives the change system message through the interaction between the base station and the terminal, and provides a system information receiving method, as shown in FIG. 3, including the following process:

S301. The base station determines that the system message needs to be changed.

S302. The base station determines that there is a UE that needs to accept the connected state of the changed system message.

S303. The base station sends downlink control information DCI to the UE in the connected state, where the DCI carries scheduling information of the changed system message.

S304. The connected UE receives the downlink control information DCI delivered by the base station.

S305. The UE in the connected state determines, according to the scheduling information of the changed system message, a resource that is occupied when the changed system message is delivered.

S306. The base station sends the changed system message to the resource of the terminal.

S307. The UE in the connected state searches for the changed system message delivered by the base station on the resource.

Optionally, when the base station determines that there is no UE in the connected state that needs to accept the changed system message, but the UE in the idle state exists, the base station notifies the UE in the idle state that the system needs to be changed by paging the paging message. Message.

Based on the same inventive concept as the method embodiment, the present application further provides a schematic diagram of a terminal. As shown in FIG. 4, the terminal device includes:

The receiving unit 401 is configured to receive downlink control information DCI sent by the base station, where the terminal is in a connected state, and the DCI carries scheduling information of the changed system message.

The processing unit 402 is configured to determine, according to the scheduling information of the changed system message, a resource that is occupied when the changed system message is delivered.

The processing unit 402 is further configured to: search, on the resource, the changed system message delivered by the base station.

In the embodiment of the present application, a terminal is provided, and the terminal in the connected state determines, by using the received DCI, the resource occupied by the changed system message, and after the base station sends the changed system message to the terminal, The terminal finds the changed system message on the resource. In this process, the E-UTRAN does not need to release the UE, so that the UE is in an idle state. The resource overhead of releasing the UE is reduced by the foregoing method, and the signaling overhead and power consumption overhead of the UE re-accessing the network are also reduced.

In a possible implementation, the DCI further carries a scrambling code, and the processing unit 401 is further configured to: identify, by using the scrambling code, that the DCI is a DCI that carries scheduling information of a changed system message. .

Based on the same inventive concept as the method embodiment, the present application further provides a schematic diagram of a base station. As shown in FIG. 5, the base station includes:

The sending unit 501 is configured to send downlink control information DCI to the terminal, where the terminal is in a connected state, and the DCI carries scheduling information of the changed system message.

The processing unit 502 is configured to: on the terminal, occupy resources required for the system message to be delivered when the changed system message is sent according to the scheduling information of the changed system message.

The sending unit 501 is further configured to send the changed system message to the resource of the terminal.

In the embodiment of the present application, a base station is configured, and the base station sends a DCI that carries the scheduling information of the changed system message to the terminal in the connected state, and occupies the resources to be occupied when the changed system message is delivered, and the base station goes to the terminal. After the changed system message is sent, the terminal searches for the changed system message on the resource. In this process, the E-UTRAN does not need to release the UE, so that the UE is in an idle state. The resource overhead of releasing the UE is reduced by the foregoing method, and the signaling overhead and power consumption overhead of the UE re-accessing the network are also reduced.

In a possible implementation, the DCI further carries a scrambling code, and the processing unit is further configured to: notify, by using the scrambling code, the DCI to be the scheduling information that carries the changed system message by using the scrambling code. DCI.

The division of the modules in the embodiment of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner. In addition, each functional module in each embodiment of the present application may be integrated into one processing. In the device, it can also be physically existed alone, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules.

The integrated module may be implemented in the form of hardware. As shown in FIG. 6, the terminal may include a processor 601, and the hardware of the entity corresponding to the processing unit 402 may be the processor 601. The terminal may further include a transceiver 604, and the hardware of the entity corresponding to the receiving unit 401 may be the transceiver 604. The processor 601 can be a central processing unit (English: central processing unit, CPU for short), or a digital processing module or the like. The terminal device further includes a memory 602 for storing a program executed by the processor 601. The memory 602 can be a non-volatile memory, such as a hard disk (English: hard disk drive, abbreviated as HDD) or a solid state hard disk (English: solid-stae drive, abbreviation: SSD), or a volatile memory (English: volatile Memory), such as random access memory (English: random-access memory, abbreviation: RAM). Memory 602 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

The processor 601 is configured to execute the program code stored in the memory 602, specifically invoke the program instruction stored in the memory 602, and receive the downlink control information DCI sent by the base station through the transceiver 604, according to the scheduling information of the changed system message. And determining, by the resource, the changed system message delivered by the base station.

The specific connection medium between the processor 601 and the memory 602 is not limited in the embodiment of the present application. The embodiment of the present application is connected between the processor 601 and the memory 602 in FIG. 6 through a bus 603. The bus is indicated by a thick line in FIG. 6. The connection manner between other components is only for illustrative description, and is not cited. Limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 6, but it does not mean that there is only one bus or one type of bus.

As shown in FIG. 7, the base station may include a processor 701, and the hardware of the entity corresponding to the processing unit 502 may be the processor 701. The base station may further include a transceiver 704, and the hardware of the entity corresponding to the sending unit 501 may be the transceiver 704. The processor 701 can be a central processing unit (English: central processing unit, CPU for short), or a digital processing module or the like. The terminal device further includes a memory 702 for storing a program executed by the processor 701. The memory 702 can be a non-volatile memory, such as a hard disk (English: hard disk drive, Abbreviations: HDD) or solid state drive (English: solid-state drive, abbreviation: SSD), etc., can also be volatile memory (English: volatile memory), such as random access memory (English: random-access memory, abbreviation: RAM). Memory 702 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

The processor 701 is configured to execute the program code stored in the memory 702, specifically invoke the program instruction stored in the memory 702, and send the downlink control information DCI to the terminal through the transceiver 704, according to the scheduling information of the changed system message. The resource required for the delivery of the changed system message is received on the terminal; the changed system message is sent by the transceiver 704 to the resource of the terminal.

The specific connection medium between the processor 701 and the memory 702 is not limited in the embodiment of the present application. The embodiment of the present application is connected between the processor 701 and the memory 702 in FIG. 7 through a bus 703. The bus is indicated by a thick line in FIG. 7. The connection manner between other components is only for illustrative description, and is not cited. Limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 7, but it does not mean that there is only one bus or one type of bus.

The embodiment of the invention further provides a computer readable storage medium for storing computer software instructions required to execute the above-mentioned processor, which comprises a program for executing the above-mentioned processor.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A system information receiving method, comprising:

The terminal receives the downlink control information DCI sent by the base station, where the terminal is in a connected state, and the DCI carries scheduling information of the changed system message;

Determining, by the terminal, the resources occupied when the changed system message is delivered, according to the scheduling information of the changed system message;

The terminal searches for the changed system message delivered by the base station on the resource.
The method according to claim 1, wherein said DCI further carries a scrambling code;

The method further includes:

The terminal identifies, by using the scrambling code, that the DCI is a DCI that carries scheduling information of a changed system message.
The method according to claim 1 or 2, wherein the format of the DCI and the meaning of each bit in the DCI are pre-configured, and the bit of the DCI is at least 34 bits.
A system information receiving method, comprising:

The base station sends the downlink control information DCI to the terminal, where the terminal is in a connected state, and the DCI carries scheduling information of the changed system message;

And the base station occupies the resources required for the system message to be delivered after the changed system message is used on the terminal according to the scheduling information of the changed system message;

The base station sends the changed system message to the resource of the terminal.
The method according to claim 4, wherein said DCI further carries a scrambling code;

The method further includes:

The base station informs the terminal that the DCI is a DCI carrying scheduling information of the changed system message by using the scrambling code.
The method according to claim 4 or 5, wherein the format of the DCI and the meaning of each bit in the DCI are pre-configured, and the bit of the DCI is at least 34 bits.
A terminal, comprising:

a receiving unit, configured to receive downlink control information (DCI) sent by the base station, where the terminal is in a connected state, and the DCI carries scheduling information of the changed system message;

a processing unit, configured to determine, according to the scheduling information of the changed system message, a resource that is occupied when the changed system message is delivered;

The processing unit is further configured to: search for the changed system message delivered by the base station on the resource.
The terminal according to claim 7, wherein the DCI further carries a scrambling code;

The processing unit is further configured to:

The DCI is identified by the scrambling code as a DCI carrying scheduling information of the changed system message.
The terminal according to claim 7 or 8, wherein the format of the DCI and the meaning of each bit in the DCI are pre-configured, and the bit of the DCI is at least 34 bits.
A base station, comprising:

a sending unit, configured to send downlink control information DCI to the terminal, where the terminal is in a connected state, and the DCI carries scheduling information of the changed system message;

a processing unit, configured to occupy the change on the terminal according to the scheduling information of the changed system message Resources required when the system message is delivered;

The sending unit is further configured to send the changed system message to the resource of the terminal.
The base station according to claim 10, wherein the DCI further carries a scrambling code;

The processing unit is further configured to:

The DCI is informed by the scrambling code that the DCI is a DCI carrying scheduling information of the changed system message.
The base station according to claim 10 or 11, wherein the format of the DCI and the meaning of each bit in the DCI are pre-configured, and the bit of the DCI is at least 34 bits.
A terminal, comprising:

Transceiver, processor and memory;

The memory is for storing a software program, the processor is for reading a software program stored in the memory, transmitting and receiving data through the transceiver, and implementing the method of any one of claims 1 to 3.
A base station, comprising:

Transceiver, processor and memory;

The memory is for storing a software program, the processor is for reading a software program stored in the memory, transmitting and receiving data through the transceiver, and implementing the method of any one of claims 4 to 6.
A computer readable storage medium, comprising instructions that, when run on a computer, cause the computer to perform the method of any one of claims 1 to 3 or any one of 4 to 6.