WO2019062063A1 - 一种系统信息指示方法及装置 - Google Patents

一种系统信息指示方法及装置 Download PDF

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Publication number
WO2019062063A1
WO2019062063A1 PCT/CN2018/082048 CN2018082048W WO2019062063A1 WO 2019062063 A1 WO2019062063 A1 WO 2019062063A1 CN 2018082048 W CN2018082048 W CN 2018082048W WO 2019062063 A1 WO2019062063 A1 WO 2019062063A1
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Prior art keywords
information
indication information
sib1
mib
changes
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PCT/CN2018/082048
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English (en)
French (fr)
Inventor
费永强
余政
南方
王宏
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华为技术有限公司
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Publication of WO2019062063A1 publication Critical patent/WO2019062063A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a system information indication method and apparatus.
  • the Long Term Evolution (LTE) system can support Machine Type Communication (MTC) services.
  • MTC Machine Type Communication
  • UE User Equipment
  • MTC UE User Equipment
  • the MTC UE determines whether the system information (SI) changes by receiving a paging (Paging) message (or Direct Indication Information (DII)) sent by the base station including system information modification (systemInfoModification) or systemInfoModification-eDRX. .
  • the systemInfoModification is used to indicate whether other SIBs except the System Information Block (SIB) 10, SIB11, SIB12, and SIB14 will change in the next change period.
  • SIB System Information Block
  • SIB11, SIB12, and SIB14 will change in the next change period.
  • the systemInfoModification-eDRX is similar to the systemInfoModification. The difference is that the systemInfoModification-eDRX corresponds to the MTC UE configured with the Enhanced Discontinuous Reception (eDRX) mode.
  • eDRX Enhanced Discontinuous Reception
  • the MTC UE determines that one or more of the master information block (MIB), the SIB1, and the other SIBs (other than the SIB10, the SIB11, the SIB12, and the SIB14) change
  • the MTC UE first receives and Reading the MIB carried in the Physical Broadcast Channel (PBCH); then, the MTC UE determines, according to the acquired MIB, the System Information Block 1 (Bandwidth-Reduced System Information Block 1, SIB1-BR)
  • SIB1-BR System Information Block 1
  • the scheduling information is used to receive and read the SIB1-BR according to the determined scheduling information, and the SIB1-BR includes scheduling information of other SIBs.
  • the MTC UE determines whether other SIBs change according to the acquired SIB1-BR. If there is a change, further access to other SIBs.
  • the MTC UE After the MTC UE determines that the system information changes according to the paging message or the DII, the foregoing process needs to be performed to obtain the changed system information, and the time consumption is large, thereby affecting the response time of the MTC UE, and reducing the user's Experience.
  • the present application provides a system information indication method and apparatus, which can solve the problem that the time for the MTC UE to acquire system information is large.
  • the first aspect provides a method for acquiring system information, after the network device determines the target information including the first indication information and the second indication information, and sends the target information to the communication device.
  • the first indication information is used to indicate whether the system information changes
  • the second indication information is used to indicate whether the MIB changes
  • the second indication information is used to indicate scheduling information of the SIB1-BR in the MIB.
  • the target information determined by the network device includes first indication information for indicating whether the system information changes, and second indication information for indicating whether the MIB changes or the scheduling information for indicating the SIB1-BR in the MIB, Therefore, after the network device sends the target information to the communication device, the communication device can determine the details of the system information change in the scene of the system change, that is, the communication device can determine the system information that has not changed, and the change occurs. System information. In this way, for the system information that has not changed, the communication device can directly obtain the stored system information, and does not need to communicate with the network device, thereby effectively reducing the time consumption.
  • the second indication information when the second indication information is used to indicate whether the MIB changes, the second indication information is used to indicate whether the scheduling information of the SIB1-BR in the MIB changes. Or the second indication information is used to indicate whether the information other than the system frame number (SFN) in the MIB changes, or the second indication information is used to indicate other information except the system information change indication information in the MIB. Whether the information changes; or the second indication information is used to indicate whether the information other than the SFN and the system information change indication information in the MIB changes.
  • SFN system frame number
  • the MIB includes the scheduling information of the SIB1-BR and the periodically changing SFN. Therefore, whether the scheduling information of the SIB1-BR in the MIB changes is equivalent to whether the MIB changes. Similarly, whether the information other than the SFN changes in the MIB changes. It is equivalent to whether the MIB changes.
  • the second indication information indicates whether the MIB changes
  • the second indication information may be used to indicate whether the scheduling information of the SIB1-BR in the MIB changes, or may be used to indicate whether other information except the SFN in the MIB occurs. Variety.
  • the MIB further includes system information change indication information indicating whether the SIBs other than the SIB10, the SIB11, the SIB12, and the SIB14 have changed in the past period of time, or indicate that the SIB1-BR is in the past Whether there is a change in the period of time, but does not indicate whether the information other than the system information change indication information in the MIB changes.
  • the second indication information indicates whether the MIB changes
  • the second indication information may also be used to indicate whether the information other than the system information change indication information changes, and may also be used to indicate that the SFN and the system information change in the MIB. Indicates whether other information other than the information has changed.
  • the size of the second indication information may be 1 bit.
  • the second indication information when used to indicate whether the MIB changes, includes a first identifier and a second identifier, where the first identifier indicates SIB1 Whether the transport block size of the BR changes, and the second identifier indicates whether the number of repetitions of the SIB1-BR changes.
  • the MIB includes scheduling information of the SIB1-BR, and the scheduling information of the SIB1-BR includes the transport block size of the SIB1-BR and the number of repetitions of the SIB1-BR. Therefore, when the second indication information is used to indicate whether the MIB changes, the second indication The information may include a first identity indicating whether the transport block size of the SIB1-BR has changed and a second identity indicating whether the number of repetitions of the SIB1-BR has changed. In this case, the size of the second indication information may be 2 bits.
  • the second indication information when the second indication information is used to indicate the scheduling information of the SIB1-BR in the MIB, when the system bandwidth is less than 5 MHz, the second indication information is used.
  • the size of the second indication information is 3 bits; when the system bandwidth is greater than or equal to 5 MHz, the size of the second indication information is 5 bits, and the second indication information is used to indicate SIB1-
  • the transport block size and the number of repetitions of the BR, or the second indication information includes a first sub-information of 2 bits in size and a second sub-information of 3 bits in size, the first sub-information being used to indicate the number of repetitions of the SIB1-BR, The second sub-information is used to indicate the transport block size of the SIB1-BR.
  • the target information in the application further includes third indication information, where the third indication information is used to indicate other SIBs except SIB10, SIB11, SIB12, and SIB14. Whether it changes or is used to indicate whether the SIB1-BR has changed. Since the SIB1-BR changes due to changes in other SIBs except SIB1-BR, SIB10, SIB12, and SIB14, the third indication information can be used to indicate whether other SIBs other than SIB10, SIB11, SIB12, and SIB14 are A change can also be used to indicate whether the SIB1-BR has changed. In this scenario, the communication device can determine the SIB that has not changed according to the third indication information, so that the communication device can acquire the stored SIB that has not changed without communication with the network device, which reduces the waste of time.
  • the third indication information is used to indicate other SIBs except SIB10, SIB11, SIB12, and SIB14. Whether it changes or is used to indicate whether the SIB1-BR has changed. Since
  • the DII or the paging message includes the target information; or the Downlink Control Information (DCI) that carries the DII includes the target information.
  • DCI Downlink Control Information
  • the second indication information in this application occupies DII, or redundant bits in the DCI carrying DII.
  • a network device comprising a determining unit and a transmitting unit.
  • the determining unit is configured to determine target information, where the target information includes first indication information and second indication information, where the first indication information is used to indicate whether the system information changes, and the second indication information is used to indicate whether the MIB changes, or The second indication information is used to indicate scheduling information of the SIB1-BR in the MIB.
  • the sending unit is configured to send the target information determined by the determining unit to the communication device.
  • the second indication information is used to indicate whether the scheduling information of the SIB1-BR in the MIB changes, or The second indication information is used to indicate whether the information other than the SFN changes in the MIB, or the second indication information is used to indicate whether the information other than the system information change indication information in the MIB changes; or the second indication The information is used to indicate whether the information other than the SFN and the system information change indication information in the MIB changes.
  • the second indication information when the foregoing second indication information is used to indicate whether the MIB changes, includes a first identifier and a second identifier, where the first identifier indicates the SIB1-BR Whether the transport block size changes, and the second identifier indicates whether the number of repetitions of the SIB1-BR changes.
  • the second indication information when the second indication information is used to indicate scheduling information of the SIB1-BR in the MIB, when the system bandwidth is less than 5 MHz, the second indication information is used. Indicates the transport block size of the SIB1-BR. The size of the second indication information is 3 bits. When the system bandwidth is greater than or equal to 5 MHz, the size of the second indication information is 5 bits, and the second indication information is used to indicate the SIB1-BR.
  • the transmission block size and the number of repetitions, or the second indication information includes a first sub-information of size 2 bits and a second sub-information of size 3 bits, the first sub-information being used to indicate the number of repetitions of the SIB1-BR, The two sub-information is used to indicate the transport block size of the SIB1-BR.
  • the target information in the present application further includes third indication information, where the third indication information is used to indicate whether other SIBs except SIB10, SIB11, SIB12, and SIB14 are A change has occurred or is used to indicate whether the SIB1-BR has changed.
  • the DII or the paging message includes the target information; or the DCI carrying the DII includes the target information.
  • a network device comprising: one or more processors, a memory, and a communication interface.
  • the memory and communication interface are connected to one or more processors.
  • the network device communicates with other devices through a communication interface.
  • the memory is for storing computer program code, the computer program code comprising instructions, when the one or more processors execute the instructions stored in the memory, the network device performs the system information indicating method as described in the first aspect above and any possible implementation thereof .
  • a computer storage medium having stored therein computer program code.
  • the processor of the network device in the third aspect executes the computer program code, the network device performs a system information indication method as in the first aspect described above and any possible implementation thereof.
  • a computer program product comprising instructions, which when executed on a network device, cause the network device to perform a system information indicating method as in the first aspect above and any one of its possible implementations.
  • the name of the above network device is not limited to the device or the function module itself. In actual implementation, these devices or function modules may appear under other names. As long as the functions of the respective devices or functional modules are similar to the present application, they are within the scope of the claims and their equivalents.
  • a system information indication method is provided.
  • the communication device first receives target information that is sent by the network device, including the first indication information and the second indication information, where the first indication information is used to indicate whether the system information changes.
  • the second indication information is used to indicate whether the MIB changes, or the second indication information is used to indicate the scheduling information of the SIB1-BR in the MIB.
  • the communications device determines the system information according to the first indication information and the second indication information.
  • the communication device acquires the stored system information and/or re-receives the system information sent by the network device according to the change of the system information.
  • the first indication information in the target information is used to indicate whether the system information changes
  • the second indication information is used to indicate whether the MIB changes or is used to indicate scheduling information of the SIB1-BR in the MIB.
  • the communication device can determine the details of the system information change in the scenario in which the system information changes according to the first indication information and the second indication information, that is, the communication device can determine the system information that has not changed, and the changed system information. . In this way, for the system information that has not changed, the communication device can directly obtain the stored system information, and does not need to communicate with the network device, thereby effectively reducing the time consumption.
  • the second indication information when the second indication information is used to indicate whether the MIB changes, the second indication information is used to indicate whether the scheduling information of the SIB1-BR in the MIB changes. Or the second indication information is used to indicate whether the information other than the SFN changes in the MIB, or the second indication information is used to indicate whether the information other than the system information change indication information in the MIB changes; or The indication information is used to indicate whether the information other than the SFN and the system information change indication information in the MIB changes.
  • the method for “the communication device acquires the stored system information and re-receives the system information sent by the network device according to the change of the system information” is: when the first indication information indicates that the system information changes, and the second The indication information indicates that the scheduling information of the SIB1-BR in the MIB or other information except the SFN in the MIB does not change, or when the information other than the system information change indication information in the MIB does not change, or when the MIB
  • the communication device acquires the stored MIB when the other information except the SFN and the system information change indication information does not change; the communication device re-receives the SIB1-BR sent by the network device according to the stored MIB; according to the re-received SIB1-BR , obtain other SIBs than the re-received SIB1-BR.
  • the method for “the communication device acquires other SIBs other than the re-received SIB1-BR according to the re-received SIB1-BR” may be: the communication device determines the system information in the re-received SIB1-BR. Whether the tag value systemInfoValueTag is the same as the stored systemInfoValueTag, or whether the systemInfoValueTagSI in the re-received SIB1-BR is the same as the stored systemInfoValueTagSI; if the same, the communication device acquires a stored one other than the re-received SIB1-BR. Or a plurality of other SIBs; if different, the communication device re-receives one or more other SIBs sent by the network device in addition to the re-received SIB1-BR.
  • the communication device does not need to communicate with the network device to acquire the MIB, but directly acquires the MIB stored by the communication device, which reduces the waste of time.
  • the second indication information when the foregoing second indication information is used to indicate whether the MIB changes, includes a first identifier and a second identifier, where the first identifier is used to indicate Whether the transport block size of the SIB1-BR changes, and the second identifier is used to indicate whether the number of repetitions of the SIB1-BR changes.
  • the above method for "the communication device acquires the stored system information and/or re-receives the system information transmitted by the network device according to the change of the system information" includes: when the first indication information is used to indicate that the system information changes The first identifier is used to indicate that the transport block size of the SIB1-BR does not change, and the second identifier is used to indicate that the number of repetitions of the SIB1-BR does not change, the communication device acquires the stored MIB; and the communication device according to the stored MIB, Re-receiving the SIB1-BR sent by the network device; the communication device acquires other SIBs than the re-received SIB1-BR according to the re-received SIB1-BR.
  • the communication device synchronizes Re-receiving the MIB and SIB1-BR sent by the network device; the communication device acquires other SIBs except the re-received SIB1-BR according to the re-received MIB and the re-received SIB1-BR.
  • the second indication information when the second indication information is used to indicate the scheduling information of the SIB1-BR in the MIB, when the system bandwidth is less than 5 MHz, the second indication information is used.
  • the size of the second indication information is 3 bits; when the system bandwidth is greater than or equal to 5 MHz, the size of the second indication information is 5 bits, and the second indication information is used to indicate SIB1-
  • the transport block size and the number of repetitions of the BR, or the second indication information includes a first sub-information of 2 bits in size and a second sub-information of 3 bits in size, the first sub-information being used to indicate the number of repetitions of the SIB1-BR, The second sub-information is used to indicate the transport block size of the SIB1-BR.
  • the method for determining, by the communication device, the change of the system information according to the first indication information and the second indication information includes: when the first indication information indicates that the system information changes, the communication device according to the second indication
  • the information acquires scheduling information of the SIB1-BR, and acquires the SIB1-BR according to the scheduling information.
  • the communication device does not need to communicate with the network device to acquire the MIB, but directly acquires the MIB stored by the communication device, which reduces the waste of time.
  • the target information in the application further includes third indication information, where the third indication information is used to indicate other SIBs except SIB10, SIB11, SIB12, and SIB14. Whether it changes or is used to indicate whether the SIB1-BR has changed.
  • the method for determining, by the communication device, the change of the system information according to the first indication information and the second indication information includes: the communication device according to the first indication information, the second indication information, and the third indication information, Determine how the system information changes.
  • the method for “acquiring the stored system information and re-receiving the system information sent by the network device according to the change of the system information” includes: when the first indication information indicates that the system information changes, and the second indication information is used.
  • the communication device re-receives the MIB sent by the network device; the communication device acquires the stored SIB1-BR.
  • the communication device acquires the stored MIB; the communication device The SIB1-BR sent by the network device is re-received according to the stored MIB; the communication device acquires other SIBs except the re-received SIB1-BR according to the re-received SIB1-BR.
  • the DII or the paging message includes the target information; or the DCI carrying the DII includes the target information.
  • a communication device comprising a receiving unit, a processing unit, and a storage unit.
  • the receiving unit is configured to receive the target information that is sent by the network device, where the target information includes the first indication information and the second indication information, where the first indication information is used to indicate whether the system information changes, and the second indication information is used to indicate whether the MIB occurs. Alternatively, or the second indication information is used to indicate scheduling information of the SIB1-BR in the MIB.
  • the processing unit is configured to determine a change of the system information according to the first indication information and the second indication information received by the receiving unit.
  • the processing unit is further configured to acquire system information stored by the storage unit in the communication device according to the determined change of the system information, and/or re-receive system information sent by the network device by using the receiving unit.
  • the second indication information is used to indicate whether the scheduling information of the SIB1-BR in the MIB changes, or The second indication information is used to indicate whether the information other than the SFN changes in the MIB, or the second indication information is used to indicate whether the information other than the system information change indication information in the MIB changes; or the second indication The information is used to indicate whether the information other than the SFN and the system information change indication information in the MIB changes.
  • the processing unit is configured to obtain the stored system information and re-receive the system information sent by the network device, where: the method is used to: when the first indication information indicates that the system information changes, and the second indication information is in the MIB.
  • the scheduling information of the SIB1-BR or other information other than the system frame number SFN in the MIB does not change, or when the information other than the system information change indication information in the MIB does not change, or when the SFN is excluded from the MIB
  • One or more SIBs other than the re-received SIB1-BR are re-received by the above-mentioned receiving unit.
  • the second indication information when the foregoing second indication information is used to indicate whether the MIB changes, includes a first identifier and a second identifier, where the first identifier is used to indicate the SIB1 Whether the transport block size of the -BR changes, and the second identifier is used to indicate whether the number of repetitions of the SIB1-BR changes.
  • the processing unit is configured to obtain the stored system information and/or re-receive the system information sent by the network device, including: when the first indication information is used to indicate that the system information changes, the first identifier is used to indicate the SIB1
  • the transport block size of the BR is not changed, and the second identifier is used to indicate that the number of repetitions of the SIB1-BR does not change, and the stored MIB is obtained; according to the stored MIB, the SIB1-BR sent by the network device is re-received; Obtaining SIB1-BR, acquiring other SIBs except the re-received SIB1-BR; and specifically for: when the first indication information is used to indicate that the system information changes, and the first identifier is used to indicate the transmission of the SIB1-BR When the block size is changed, and the second identifier is used to indicate that the number of repetitions of the SIB1-BR has not changed, the MIB and the SIB1-BR sent by the network device are
  • the second indication information when the second indication information is used to indicate scheduling information of the SIB1-BR in the MIB, when the system bandwidth is less than 5 MHz, the second indication information is used. Indicates the transport block size of the SIB1-BR. The size of the second indication information is 3 bits. When the system bandwidth is greater than or equal to 5 MHz, the size of the second indication information is 5 bits, and the second indication information is used to indicate the SIB1-BR.
  • the transmission block size and the number of repetitions, or the second indication information includes a first sub-information of size 2 bits and a second sub-information of size 3 bits, the first sub-information being used to indicate the number of repetitions of the SIB1-BR,
  • the two sub-information is used to indicate the transport block size of the SIB1-BR.
  • the processing unit is configured to determine, according to the first indication information and the second indication information received by the receiving unit, a change of the system information, where: when the first indication information indicates that the system information changes, Obtaining scheduling information of the SIB1-BR according to the second indication information, and acquiring the SIB1-BR according to the scheduling information.
  • the target information in the application further includes third indication information, where the third indication information is used to indicate other SIBs except SIB10, SIB11, SIB12, and SIB14. Whether it changes or is used to indicate whether the SIB1-BR has changed.
  • the processing unit is specifically configured to determine, according to the first indication information, the second indication information, and the third indication information, the change of the system information, where the processing unit is configured to acquire the stored system information and re-receive the network device.
  • the system information that is sent includes: when the first indication information indicates that the system information changes, the second indication information is used to indicate that the MIB changes, and the third indication information is used to indicate that other SIBs or SIB1-BRs have not changed, re-receiving Obtaining the stored SIB1-BR; and specifically for when the first indication information indicates that the system information changes, the second indication information is used to indicate that the MIB has not changed, and the third indication information is used to indicate another SIB Or when the SIB1-BR changes, the stored MIB is obtained; according to the stored MIB, the SIB1-BR sent by the network device is re-received; according to the re-received SIB1-BR, the SIB1-BR except the re-received is acquired. SIB.
  • the DII or the paging message includes the target information; or the DCI carrying the DII includes the target information.
  • a communication device comprising: one or more processors, a memory, and a communication interface.
  • the memory and communication interface are connected to one or more processors.
  • the communication device communicates with other devices through a communication interface.
  • the memory is for storing computer program code, the computer program code comprising instructions, when the one or more processors execute the instructions stored in the memory, the communication device performs the system information indicating method as in the sixth aspect above and any possible implementation thereof .
  • a computer storage medium having stored therein computer program code.
  • the processor of the communication device in the eighth aspect executes the computer program code, the communication device performs the system information indicating method of the sixth aspect and any of its possible implementations as described above.
  • a computer program product comprising instructions which, when run on a communication device, cause the communication device to perform a system information indication method as in the sixth aspect above and any one of its possible implementations.
  • the names of the above communication devices are not limited to the devices or the functional modules themselves. In actual implementation, these devices or functional modules may appear under other names. As long as the functions of the respective devices or functional modules are similar to the present application, they are within the scope of the claims and their equivalents.
  • FIG. 1 is a schematic flow chart of obtaining communication system information by a communication device in the prior art
  • FIG. 2 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of hardware of a smart phone according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of hardware of a base station according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart 1 of a system information indication method according to an embodiment of the present disclosure
  • FIG. 6 is a second schematic flowchart of a system information indication method according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram 1 of a network device according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram 2 of a network device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram 3 of a network device according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the words “exemplary” or “such as” are used to mean an example, illustration, or illustration. Any embodiment or design described as “exemplary” or “for example” in the embodiments of the present application should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the words “exemplary” or “such as” is intended to present the concepts in a particular manner.
  • a base station (Base Station, BS, or Enhanced Node B, eNB) periodically transmits SI to a UE, so that the UE can learn the system.
  • SIB The most basic and important system information is called MIB, and the MIB is transmitted in the Physical Broadcast Channel (PBCH).
  • General system information includes multiple SIBs, such as SIB1, SIB2, ..., SIB21, and the like.
  • SIB1 includes scheduling information of other SIBs other than SIB1, and the scheduling information includes one or more of a scheduling period, a receiving window size, and an offset parameter of other SIBs. That is to say, the UE needs to read SIB1 to be able to determine whether other SIBs other than SIB1 exist and at which time-frequency positions other SIBs transmit.
  • MTC refers to the technology of realizing the interconnection of people, things, objects and objects by deploying various devices with certain sensing, computing, execution and communication capabilities to acquire information of the physical world and realize information transmission, coordination and processing through the network.
  • the existing LTE system can support the MTC service.
  • the machine type communication UE in the LTE system is called an MTC UE.
  • the MTC UE may be a bandwidth-reduced low-complexity UE (BL UE) or a coverage enhanced UE (CE UE).
  • BL UE bandwidth-reduced low-complexity UE
  • CE UE coverage enhanced UE
  • the MTC UE has a narrow bandwidth and is usually smaller than the system bandwidth.
  • the MTC UE obtains control information by detecting a physical downlink control channel (MPDCCH) of the device type communication, instead of detecting a physical downlink channel (Physical Downlink Control Channel, PDCCH), because the bandwidth of the MTC UE is usually smaller than the system bandwidth. ) to get control information.
  • MPDCCH Physical Downlink Control Channel
  • PDCCH Physical Downlink Control Channel
  • the base station also sends the content of the SIB1-BR to the MTC UE to be the same as the content of the SIB1, but the transmission bandwidth is only one narrow band (NB).
  • NB narrow band
  • the MTC UE can obtain scheduling information of other SIBs according to the SIB1-BR.
  • the SchedulingInfoSIB1-BR of the SIB1-BR is carried in the MIB, and the size of the schedulingInfoSIB1-BR is 5 bits.
  • the schedulingInfoSIB1-BR includes the transport block size (TBS) of the SIB1-BR and the repetition number of the SIB1-BR.
  • TBS transport block size
  • the MTC UE determines the existence of the SIB1-BR, the time-frequency resources of the SIB1-BR, and the transport block size of the SIB1-BR by reading the schedulingInfoSIB1-BR information in the MIB.
  • the SIB1-BR also includes a 5-bit system information tag value (systemInfoValueTag) and a number of 2-bit systemInfoValueTagSI.
  • the system information (except MIB, SIB1, SIB10, SIB11, SIB12, SIB14) is incremented by one each time the value of systemInfoValueTag is incremented.
  • the value of systemInfoValueTag is ⁇ 0, 1, 2, ..., 31 ⁇ . After 31, it returns to 0 and restarts.
  • the MTU UE when the MTU UE acquires a systemInfoValueTag (for example, when the MTU UE leaves the cell service range for a period of time and then returns to the cell), the MTU UE compares the value of the obtained systemInfoValueTag with the previously recorded systemInfoValueTag, that is, the MTU. The UE determines whether the current system information is the same as the stored system information; if different, the MTU UE determines that the current system information has changed compared to the stored system information, and needs to consider re-acquiring the updated system information. Each systemInfoValueTagSI corresponds to one SIB, which is used to indicate the status of the SIB. The MTU UE can determine which SIBs have changed according to the systemInfoValueTagSI included in the SIB1-BR.
  • the MIB includes the scheduling information of the SIB1-BR, but the MIB cannot indicate whether the SIB1-BR has changed, and the SIB1-BR includes scheduling information of other SIBs (except SIB1-BR), and other SIBs. systemInfoValueTagSI.
  • the MTU UE accesses the cell and completes the synchronization of the primary synchronization signal (PSS)/Secondary Synchronization Signal (SSS)
  • PSS primary synchronization signal
  • SSS Secondary Synchronization Signal
  • the MTU UE needs to obtain the MIB.
  • the transmission resources of the SIB1-BR are determined, and then the SIB1-BR is demodulated.
  • the MTU UE can obtain the resource information of other SIBs and determine whether other SIBs have changed.
  • the MIB includes the scheduling information schedulingInfoSIB1-BR of the SIB1-BR, and the downlink bandwidth (Download-Bandwidth, DL-Bandwidth) and the physical hybrid automatic re-indication channel configuration information (Physical Hybrid ARQ Indicator Channel-config, PHICH- Config) and SFN.
  • the value of the DL-Bandwidth does not change, and the value of the PHICH-config hardly changes, even if the change does not affect the MTU UE, the SFN
  • the value of the VRN can be determined by the MTU UE that has been synchronized with the system for the MTU UE that has been synchronized with the system.
  • the MTU UE is configured to receive the MPDCCH carrying the Downlink Control Information (DCI) format 6-2 format on the Paging Occasion (PO).
  • DCI Downlink Control Information
  • PO Paging Occasion
  • the scheduling information indicating the paging message so that the MTU UE determines whether it is paged according to the paging message; or the MPDCCH is not used to indicate a paging message, but carries direct indication information (Direct Indication Information, DII), used to indicate whether the system information has changed.
  • DII Direct Indication Information
  • the MTU UE may determine whether the system information changes by using the paging message.
  • the paging message includes a 1-bit system information modification (systemInfoModification), which is used to indicate whether other system information except SIB10, SIB11, SIB12, and SIB14 will change in the next change period.
  • systemInfoModification 1-bit system information modification
  • the timing at which the system information changes is not arbitrary.
  • the existing standards specify the period in which the system information changes, and the system information can only change at the beginning of these periods.
  • the paging message may further include a systemInfoModification-eDRX, where the systemInfoModification-eDRX is used to indicate to the MTU UE configured with the eDRX mode whether the system information has changed.
  • the paging message may include both systemInfoModification and systemInfoModification-eDRX, and the MTU UE determines which information to refer to according to whether the eDRX is configured by itself.
  • the MPDCCH carries a DII
  • the DII is 8 bits, and specifically includes a systemInfoModification, an earthquake and tsunami warning system indication (etws-Indication), and a commercial mobile alert system indication (cmas- Indication), extended access barring Parameter Modification (eab-ParamModification), and systemInfoModification-eDRX.
  • Table 1 shows the format of the above 8-bit DII.
  • the redundant bits of DII have 3 bits, which are bit 6, bit 7, and bit 8, respectively.
  • the format of the DCI carrying the DII is DCI format 6-2.
  • the size of the information in the DCI format 6-2 format varies with the system bandwidth.
  • the number of redundant bits in the DCI carrying DII is at least 3.
  • the number of redundant bits includes the number of unused bits in DII and the number of reserved bits other than DII in DCI format 6-2.
  • Table 2 shows the number of bits and the number of redundant bits included in DCI format 6-2 for transmitting DII in different system bandwidths.
  • the DCI carrying DII includes 11 bits, of which 6 bits out of 11 bits are redundant bits, 3 out of 6 redundant bits are unused bits in DII, and 3 The bits are the number of reserved bits except DII.
  • the MTU UE can determine whether the system information changes according to the paging message or DII. In the case that the MTU UE determines that the system information changes according to the paging message or the DII, the MTU UE can only determine that the system information changes according to systemInfoModification or systemInfoModification-eDRX.
  • the MTC UE first reads the MIB carried in the PBCH; then, the MTC UE determines, according to the acquired MIB, that the base station sends the SIB1-BR. The resource information is used to read the SIB1-BR according to the determined resource information. Finally, the MTC UE determines whether the other SIB changes according to the acquired SIB1-BR. If the change occurs, the other SIBs are further acquired.
  • the MTU UE Since the MTU UE can only determine whether the system information changes according to systemInfoModification or systemInfoModification-eDRX, and cannot obtain related content of the system information change, the MTU UE needs to execute the process shown in FIG. 1 to update the system information, and the time consumption is large. It affects the response time of the MTC UE and reduces the user experience.
  • MTU UEs that are far away from the base station or in a deep coverage area where the wireless communication link is poor (such as a basement)
  • MTU UE in order to receive and read MIB, SIB1-BR, and other SIBs other than SIB1-BR
  • the MTU UE usually needs to perform multiple repeated accumulation receptions to correctly demodulate the information, so that the MTU UE takes more time to acquire system information.
  • the embodiment of the present application provides a system information indication method, by sending, to the communication device, first indication information, including indicating whether the system information changes, and indicating the MIB. Whether the change or the target information of the second indication information for indicating the scheduling information of the SIB1-BR in the MIB enables the communication device to determine the details of the system information change in the scene of the system change, that is, the communication device can Identify system information that has not changed, and system information that has changed. In this way, for the system information that has not changed, the communication device can directly obtain the stored system information, and does not need to communicate with the network device, thereby effectively reducing the time consumption.
  • the system information indication method provided by the embodiment of the present application is applicable to a communication system.
  • the communication system may be an LTE system, an LTE-A system, or another communication system that has a transmission of system information, which is not specifically limited in this embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • the communication system includes a plurality of communication devices and network devices 21, each of which performs data transmission with the network device 21.
  • Fig. 2 shows six communication devices, which are a communication device 1, a communication device 2, a communication device 3, a communication device 4, a communication device 5, and a communication device 6, respectively.
  • the communication device 4, the communication device 5, and the communication device 6 in FIG. 2 also constitute a Device to Device (D2D) communication system, and the communication device 4 and the communication device 6 communicate with the network device 21 through the communication device 5, respectively.
  • D2D Device to Device
  • the communication device in the embodiment of the present application may refer to a wireless terminal capable of receiving scheduling information and indication information sent by the network device 21.
  • the wireless terminal can be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem.
  • the wireless terminal is an MTU UE.
  • the wireless terminal can communicate with one or more core networks via a wireless access network (eg, RAN, English: Radio Access Network).
  • the wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, or can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that is connected to the wireless device.
  • Internet exchange language and/or data such as mobile phones, tablets, laptops, netbooks, personal digital assistants (PDAs).
  • PDAs personal digital assistants
  • the wireless terminal may also be referred to as a terminal device, and the terminal device may perform the method as shown in FIG.
  • the communication device shown in FIG. 2 may be a smart phone, and specific components of the smart phone are specifically described below with reference to FIG. 3 .
  • the smart phone includes a processor 31, a radio frequency (RF) circuit 32, a power source 33, a memory 34, an input unit 35, a display unit 36, an audio circuit 37, and the like.
  • RF radio frequency
  • FIG. 3 does not constitute a limitation on the smart phone, and may include more or less components such as those shown in FIG. 3, or may be combined as shown in FIG. 3. Some of the components shown may be different than the components shown in FIG.
  • the processor 31 is a control center for the smartphone that connects various portions of the entire smartphone using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 34, and recalling data stored in the memory 34.
  • processor 31 may include one or more processing units.
  • the processor 31 can integrate an application processor and a modem processor.
  • the application processor mainly processes an operating system, a user interface, an application, and the like; the modem processor mainly processes wireless communication.
  • the application processor and the modem processor may be set independently of each other or integrated in the same device.
  • the RF circuit 32 can be used for transmitting and receiving information or during a call, and receiving and transmitting the signal. Specifically, after receiving the downlink information of the base station, the processing is performed by the processor 31. In addition, the uplink data is sent to the base station.
  • RF circuits include, but are not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like.
  • RF circuitry 32 can also communicate with the network and other devices via wireless communication.
  • Wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobile Communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division Multiple) Access, CDMA), Wideband Code Division Multiple Access (WCDMA), LTE, E-mail, Short Messaging Service (SMS), etc.
  • GSM Global System of Mobile Communication
  • GPRS General Packet Radio Service
  • Code Division Multiple Access Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • E-mail Short Messaging Service
  • SMS Short Messaging Service
  • the smart phone includes a power source 33 (such as a battery) that supplies power to various components.
  • a power source can be logically coupled to the processor 31 through a power management system to manage functions such as charging, discharging, and power management through the power management system.
  • the memory 34 can be used to store software programs and modules, and the processor 31 executes various functional applications and data processing of the smartphone by running software programs and modules stored in the memory 34.
  • the memory 34 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as receiving target information), and the like; and the storage data area may be stored according to the use of the smart phone. Created data (such as audio data, phone book), etc.
  • memory 34 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the input unit 35 can be configured to receive input numeric or character information and to generate key signal inputs related to user settings and function controls of the smartphone.
  • the input unit 35 may include a touch screen 351 and other input devices 352.
  • the touch screen 351 can collect touch operations on or near the user (such as the operation of the user using a finger, a stylus, or the like on or near the touch screen 351), and The preset program drives the corresponding connection device.
  • the touch screen 351 may include two parts of a touch detection device and a touch controller. Wherein, the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information.
  • the processor 31 is provided and can receive commands from the processor 31 and execute them.
  • the touch screen 351 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the display unit 36 can be used to display information input by the user or information provided to the user as well as various menus of the smartphone.
  • the display unit 36 can include a display panel 361.
  • the display panel 361 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • the touch screen 351 may cover the display panel 361, and when the touch screen 351 detects a touch operation on or near it, transmits to the processor 31 to determine the type of the touch event, and then the processor 3 displays the panel according to the type of the touch event. A corresponding visual output is provided on the 361.
  • the touch screen 351 and the display panel 361 are two separate components to implement the input and output functions of the smartphone, in some embodiments, the touch screen 351 can be integrated with the display panel 361 to implement the smart function. The input and output functions of the phone.
  • An audio circuit 37, a speaker 371 and a microphone 372 are provided for providing an audio interface between the user and the smartphone.
  • the audio circuit 37 can transmit the converted electrical data of the received audio data to the speaker 371 for conversion to the sound signal output by the speaker 371; on the other hand, the microphone 372 converts the collected sound signal into an electrical signal, by the audio circuit 37. After receiving, it is converted to audio data, and then the audio data is output to the RF circuit 32 for transmission to, for example, another smartphone, or the audio data is output to the memory 34 for further processing.
  • the smartphone may also include various sensors (such as a gyro sensor, a hygrometer sensor, an infrared sensor or a magnetometer sensor), a Wi-Fi module, a Bluetooth module, a housing, and the like. Not shown in Figure 3.
  • the network device 21 in the embodiment of the present application transmits system information to each communication device.
  • the network device 21 is a device having a central control function, such as a base station, a pico, a transmission point (TP), a relay, an access point (AP), and the like.
  • the network device 21 shown in FIG. 2 may be a base station, and specific components of the base station are specifically described below with reference to FIG. 4.
  • the base station includes: a baseband unit (BBU), a radio remote unit (RRU), and an antenna.
  • BBU baseband unit
  • RRU radio remote unit
  • the BBU and the RRU can be connected by using an optical fiber, and the RRU is further connected by a coaxial cable.
  • the power splitter (coupler) is connected to the antenna, generally one BBU can connect multiple RRUs.
  • the RRU can include four modules: a digital intermediate frequency module, a transceiver module, a power amplifier module, and a filtering module.
  • the digital intermediate frequency module is used for modulation and demodulation of optical transmission, digital up-conversion, digital-to-analog conversion, etc.; the transceiver module completes the conversion of the intermediate frequency signal to the radio frequency signal; and after the amplification of the power amplifier module and the filtering of the filtering module, the RF signal is transmitted through the antenna.
  • a digital intermediate frequency module is used for modulation and demodulation of optical transmission, digital up-conversion, digital-to-analog conversion, etc.
  • the transceiver module completes the conversion of the intermediate frequency signal to the radio frequency signal
  • the RF signal is transmitted through the antenna.
  • the BBU is used to complete the baseband processing functions (encoding, multiplexing, modulation, and spreading) of the Uu interface (ie, the interface between the terminal device and the base station), and between the Radio Network Controller (RNC) and the base station.
  • FIG. 5 is a schematic flowchart diagram of a system information indication method according to an embodiment of the present disclosure.
  • the system information indication method may be applied to the communication system shown in FIG. 2 .
  • S500 and S501 are performed by the network device 21 shown in FIG. 2, and may be executed by a processor in the network device 21.
  • S502 and S503 are performed by the communication device shown in FIG. 2, and in particular by a processor in the communication device.
  • the system information indicating method includes the following steps.
  • the S500 and the network device determine target information.
  • the target information includes the first indication information and the second indication information, where the first indication information is used to indicate whether the system information changes, the second indication information is used to indicate whether the MIB changes, or the second indication information is used to indicate the MIB.
  • Scheduling information of SIB1-BR As can be seen from the foregoing description, in the present application, schedulingInfoSIB1-BR can be used to indicate the scheduling information of the SIB1-BR in the MIB.
  • the second indication information may also be used to indicate whether the MIB changes and the scheduling information of the SIB1-BR in the MIB.
  • the network device sends the target information to the communication device.
  • the communications device determines, according to the first indication information and the second indication information, a change of the system information.
  • the system information includes an MIB and a plurality of SIBs.
  • the communication device determines that the change in the system information includes at least one of the communication device determining whether the MIB has changed and the communication device determining whether any of the SIBs have changed.
  • the communication device acquires the stored system information or re-receives the system information sent by the network device according to the change of the system information.
  • the network device periodically sends system information to the communication device, and the system information sent by the network device also periodically changes. Before transmitting the system information, the network device determines target information, where the target information includes the first indication information and the second indication information, that is, the network device performs S500.
  • the target information is DII, or a paging message, or a DCI carrying DII.
  • the embodiment of the present application is described by taking the target information as the DCI carrying the DII as an example.
  • the first indication information is used to indicate whether the system information has changed.
  • the first indication information can be expressed as systemInfoModification or systemInfoModification-eDRX.
  • the size of the first indication information is 1 bit. Exemplarily, when the value of the first indication information is “1”, the first indication information indicates that the system information changes; when the value of the first indication information is “0”, the first indication information indicates that the system information is not A change has occurred.
  • the second indication information is used to indicate whether the MIB has changed.
  • the DCI carrying the DII includes redundant bits, and the DCI carrying the DII includes different numbers of redundant bits under different system bandwidths.
  • the second indication information occupies redundant bits in the DCI carrying the DII, so that the existing DCI carrying the DII can be implemented, and the adaptability is strong.
  • the MIB includes scheduling information of SIB1-BR, DL-Bandwidth, PHICH-config, and SFN.
  • the value of DL-Bandwidth does not change, and the value of PHICH-config hardly changes. Even if the change occurs, it will not affect the MTU UE.
  • the value of SFN The periodicity changes, but the communication device can determine the value of the SFN itself after synchronizing with the system. Therefore, "whether the MIB changes" is equivalent to "whether the scheduling information of the SIB1-BR in the MIB changes" or "whether the information other than the SFN in the MIB changes".
  • the second indication information indicates whether the scheduling information of the SIB1-BR in the MIB changes, or the second indication information indicates whether the information other than the SFN in the MIB changes.
  • the size of the second indication information may be 1 bit.
  • the second indication information occupies one redundant bit in the DCI carrying the DII.
  • the MIB may also include system information change indication information.
  • the system information change indication information indicates whether other SIBs other than SIB10, SIB11, SIB12, and SIB14 have changed in the past period of time (exemplary, the past 24 hours), and does not indicate that the system information changes in the MIB. Whether the information other than the indication information changes; or, the system information change indication information indicates whether the SIB1-BR has changed in the past period of time (exemplary, the past 24 hours), and does not indicate the MIB Whether the system information change indicates that the information other than the information has changed.
  • other SIBs may include SIB1-BR, and changes in SIBs other than SIB1-BR in other SIBs may cause changes in SIB1-BR.
  • the system information change indication information may change whether the communication device determines whether to re-receive the MIB information. Exemplarily, when the system information change indication information is “1”, it indicates that other SIBs change; when the system information change indication information is “0”, it indicates that other SIBs have not changed. If the system information change indication information is changed from “0" to "1”, the other SIBs are changed. Therefore, the communication device needs to re-receive the SIB1-BR, and can determine whether to receive the SIB-BR according to the SIB-BR. Other SIBs, but do not necessarily need to re-receive the MIB. If the system information change indication information changes from "1" to "0”, the unaltered time on behalf of other SIBs exceeds 24 hours.
  • the communication device updates other SIBs within 24 hours, the communication device does not need to be renewed.
  • Receiving the SIB1-BR does not need to re-receive other SIBs, and does not necessarily need to re-receive the MIB.
  • the SIB1-BR when the system information change indication information is “1”, the SIB1-BR is changed; when the system information change indication information is “0”, the SIB1-BR is not changed. If the system information change indication information changes from “0" to "1”, the representative SIB1-BR has changed. Therefore, the communication device needs to re-receive the SIB1-BR, and can determine whether to receive the SIB-BR according to the SIB-BR. Other SIBs, but do not necessarily need to re-receive the MIB. If the system information change indication information changes from "1" to "0", the unchanged time representing the SIB1-BR exceeds 24 hours.
  • the communication device updates the SIB1-BR within 24 hours, the communication device does not It is necessary to re-receive the SIB1-BR, and does not need to re-receive other SIBs, and does not necessarily need to re-receive the MIB.
  • the system information change indication information may not affect the communication device to determine whether it is necessary to re-receive the MIB information. Therefore, "whether the MIB changes" is equivalent to "whether the information other than the system information change indication information in the MIB changes" or is equivalent to "whether the information other than the SFN and the system information change indication information in the MIB occurs. Variety”. That is to say, the second indication information may indicate whether other information except the system information change indication information changes, and may also indicate whether the information other than the SFN and the system information change indication information in the MIB changes. In this case, the size of the second indication information may be 1 bit. The second indication information occupies one redundant bit in the DCI carrying the DII.
  • the scheduling information of the SIB1-BR includes the TBS of the SIB1-BR and the number of repetitions of the SIB1-BR. Therefore, whether the scheduling information of the SIB1-BR in the MIB changes may also be expressed as “SIB1-BR”. Whether the TBS changes "and whether the number of repetitions of the SIB1-BR changes". That is, the second indication information may include the first identifier and the second identifier, where the first identifier indicates whether the TBS of the SIB1-BR changes, and the second identifier indicates whether the number of repetitions of the SIB1-BR changes. In this case, the size of the second indication information may be 2 bits, and the sizes of the first identifier and the second identifier are 1 bit, respectively. Similarly, both the first indication and the second indication occupy one redundant bit in the DCI carrying the DII.
  • the communication device stores the acquired system information each time the system information is acquired, so the network device can send the SIB1-BR scheduling information to the communication device, so that the communication device can be stored according to the
  • the scheduling information of the SIB1-BR and the scheduling information of the re-received SIB1-BR determine whether the scheduling information of the SIB1-BR changes. That is to say, the scheduling information that the network device sends the current SIB1-BR to the communication device indirectly reflects whether the scheduling information of the SIB1-BR changes, that is, whether the MIB changes.
  • the second indication information indicates scheduling information of the SIB1-BR.
  • the scheduling information of the SIB1-BR includes the TBS of the SIB1-BR and the repetition number of the SIB1-BR.
  • TBS the number of TBS for SIB1-BR
  • the values are 208, 256, 328, 504, 712, and 936
  • the number of repetitions of SIB1-BR is three, and the values are 4, 8, and 16, respectively.
  • Table 3 shows the correspondence between the decimal value of the scheduling information of the SIB1-BR and the number of repetitions of the TBS and SIB1-BR of the SIB1-BR.
  • Table 3 when the value of the scheduling information schedulingInfoSIB1-BR of the SIB1-BR is 6, the value of the TBS of the SIB1-BR is 256, and the number of repetitions of the SIB1-BR is 16.
  • schedulingInfoSIB1-BR repeat times TBS 1 4 208 2 8 208 3 16 208 4 4 256 5 8 256 6 16 256 7 4 328 8 8 328 9 16 328 10 4 504
  • the number of repetitions of the SIB1-BR is only 4.
  • the system bandwidth is greater than or equal to 5 MHz, that is, when the system bandwidth is 5 MHz, 10 MHz, 15 MHz, or 20 MHz
  • the number of repetitions of the SIB1-BR may be 4, 8, or 16.
  • the second indication information indicates the scheduling information of the SIB1-BR
  • the second indication information specifically indicates the transport block size of the SIB1-BR.
  • the second indication information does not need to indicate the number of repetitions of the SIB1-BR. Since there are only 6 types of TBSs of the SIB1-BR in the actual application, the second indication information occupies 3 redundant bits of the DCI carrying the DII.
  • Table 4 shows different values (binary representation) of the second indication information and the value of each second indication information when the second indication information indicates the scheduling information of the SIB1-BR and the system bandwidth is less than 5 MHz.
  • Corresponding SIB1-BR TBS With reference to Table 4, in the scenario where the second indication information indicates the scheduling information of the SIB1-BR and the system bandwidth is less than 5 MHz, when the value of the second indication information is 000, the second indication information indicates that the TBS of the SIB1-BR is 208. .
  • the second indication information when the values of the second indication information are 110 and 111, the second indication information does not indicate the TBS of the SIB1-BR.
  • the second indication information when the value of the second indication information is 110 and 111 in the foregoing Table 4, the second indication information may indicate at least one of the following information:
  • the MIB has no information other than the SFN, or the communication device uses the stored system information.
  • the communication device In addition to the change of the scheduling information of the SIB1-BR in the MIB, other information also changes, or the communication device re-receives the MIB and/or the SIB1-BR.
  • SIB1-BR and/or other SIBs have not changed.
  • the second indication information indicates the scheduling information of the SIB1-BR
  • the second indication information is specifically used to indicate the transport block size and the number of repetitions of the SIB1-BR.
  • the number of redundant bits in the DCI carrying the DII is at least 5. Therefore, the second indication information can occupy 5 redundant bits included in the DCI carrying the DII.
  • the second indication information indicates the scheduling information of the SIB1-BR
  • the value of the second indication information is used to indicate the transport block size and the number of repetitions of the SIB1-BR, such as
  • the second indication information includes a first sub-information of size 2 bits and a second sub-information of size 3 bits, where the first sub-information is used to indicate the number of repetitions of the SIB1-BR, and the second sub-information Used to indicate the transport block size of the SIB1-BR.
  • Table 5 shows the different values (binary representation) of the first sub-information and the repetition of its corresponding SIB1-BR when the second indication information indicates the scheduling information of the SIB1-BR and the system bandwidth is greater than or equal to 5 MHz. frequency.
  • the second indication information indicates the scheduling information of the SIB1-BR
  • the system bandwidth is greater than or equal to 5 MHz
  • the first sub-information indicates the number of repetitions of the SIB1-BR. Is 8.
  • Table 6 shows different values (binary representation) of the second sub-information and its corresponding SIB1-BR TBS when the second indication information indicates the scheduling information of the SIB1-BR and the system bandwidth is greater than or equal to 5 MHz.
  • the second indication information indicates the scheduling information of the SIB1-BR
  • the system bandwidth is greater than or equal to 5 MHz
  • the second sub-information indicates that the TBS of the SIB1-BR is 328.
  • the value of the second indication information that is not used to indicate the number of repetitions of the SIB1-BR or the TBS of the SIB1-BR may be used to indicate at least one of the following information. :
  • the MIB has no information other than the SFN, or the communication device uses the stored system information.
  • the communication device In addition to the change of the scheduling information of the SIB1-BR in the MIB, other information also changes, or the communication device re-receives the MIB and/or the SIB1-BR.
  • SIB1-BR and/or other SIBs have not changed.
  • the DCI carrying the DII includes a minimum of 3, so when the size of the second indication information is less than or equal to 3 bits, the first The two indication information may occupy redundant bits in the DII or redundant bits in the DCI carrying the DII.
  • the size of the second indication information is greater than 3 bits, the second indication information not only needs to occupy redundant bits in the DII, but also needs to occupy other redundant bits except the DII in the DCI carrying the DII.
  • the network device After determining the target information including the first indication information and the second indication information, the network device sends the target information to the communication device, that is, the network device performs S502.
  • the communication device can receive the target information, so that the communication device can determine the change of the system information according to the first indication information and the second indication information in the target information, and determine according to the The change of the system information, the stored system information or the re-reception of the system information sent by the network device, that is, the communication device performs S502 and S503.
  • the communication device performs the following process: acquiring the stored MIB, and then, according to the stored MIB, re-receiving the SIB1-BR sent by the network device, and acquiring, according to the re-received SIB1-BR, the re-received Other SIBs other than SIB1-BR.
  • the method for the communication device to obtain the SIBs other than the re-received SIB1-BR according to the re-received SIB1-BR is: the communication device determines whether the re-received SIB1-BR is the same as the stored SIB1-BR; The communication device acquires the stored SIBs other than the re-received SIB1-BR; if different, the communication device re-receives the SIBs sent by the network device except the re-received SIB1-BR.
  • the second indication information indicates whether the scheduling information of the SIB1-BR in the MIB changes, when the first indication information indicates that the system information changes, and the second indication information indicates that the scheduling information of the SIB1-BR in the MIB changes.
  • the communication device re-receives the MIB.
  • it can determine whether the re-received MIB is the same as the stored MIB, and perform a subsequent process according to the judgment result, or read the MIB according to the existing process of acquiring the system information. Scheduling information of the SIB1-BR, and acquiring the SIB1-BR according to the read SIB1-BR scheduling information, and acquiring other SIBs according to the acquired SIB1-BR.
  • the processing flow of the communication device and the second indication information indicate whether the scheduling information of the SIB1-BR in the MIB changes.
  • the processing flow of the device is the same and will not be described in detail here.
  • the first identifier is used to indicate whether the transport block size of the SIB1-BR changes
  • the second identifier is used to indicate whether the number of repetitions of the SIB1-BR changes.
  • the communication device when the first indication information indicates that the system information changes, the first identifier is used to indicate that the transport block size of the SIB1-BR does not change, and the second identifier is used to indicate that the number of repetitions of the SIB1-BR does not change, the communication device The following process is performed: acquiring the stored MIB; re-receiving the SIB1-BR sent by the network device according to the stored MIB; and acquiring other SIBs than the re-received SIB1-BR according to the re-received SIB1-BR.
  • the method for the communication device to obtain the SIBs other than the re-received SIB1-BR according to the re-received SIB1-BR may refer to the foregoing description, and details are not described herein again.
  • the first identifier is used to indicate whether the transport block size of the SIB1-BR changes
  • the second identifier is used to indicate whether the number of repetitions of the SIB1-BR changes.
  • the communication device re- Receive MIB.
  • the first identifier is used to indicate whether the transport block size of the SIB1-BR changes
  • the second identifier is used to indicate whether the number of repetitions of the SIB1-BR changes.
  • the communications device performs The following process: synchronously re-receiving the MIB and SIB1-BR sent by the network device, that is, the communication device receives the SIB1-BR sent by the network device in the process of re-receiving the MIB sent by the network device; according to the re-received The MIB and the re-received SIB1-BR acquire other SIBs than the re-received SIB1-BR.
  • the first identifier is used to indicate whether the transport block size of the SIB1-BR changes, and the second identifier is used to indicate whether the number of repetitions of the SIB1-BR changes.
  • the communication device re-receives when the first indication information indicates that the system information changes, the first identifier is used to indicate that the transport block size of the SIB1-BR changes, and the second identifier is used to indicate that the number of repetitions of the SIB1-BR changes.
  • MIB For the method for the communication device to re-receive the MIB, reference may be made to the foregoing description, and details are not described herein again.
  • the communications device performs the following process: when the first indication information indicates that the system information changes, according to the second indication information Obtain scheduling information of the SIB1-BR, and obtain the SIB1-BR according to the scheduling information.
  • the communication device may also acquire the scheduling information of the stored SIB1-BR; when the scheduling information of the stored SIB1-BR is the same as the scheduling information of the SIB1-BR indicated by the second indication information, it is determined that the MIB has not changed; When the scheduling information of the SIB1-BR is different from the scheduling information of the SIB1-BR indicated by the second indication information, it is determined that the MIB changes.
  • the target information in the embodiment of the present application may include third indication information in addition to the foregoing first indication information and the second indication information.
  • the third indication information is used to indicate whether other SIBs other than SIB10, SIB11, SIB12, and SIB14 are changed or used to indicate whether the SIB1-BR changes. This is because changes in SIBs other than SIB1-BR, SIB10, SIB12, and SIB14 cause changes in systemInfoValueTag and/or systemInfoValueTagSI in SIB1-BR. Therefore, indications other than SIB10, SIB11, SIB12, and SIB14 Whether the other SIB changes or not indicates whether the SIB1-BR changes.
  • the size of the third indication information may be 1 bit. In this way, after receiving the target information, the communication device determines the change of the system information according to the first indication information, the second indication information, and the third indication information.
  • S502 in FIG. 5 may be replaced with S502'.
  • the communication device determines, according to the first indication information, the second indication information, and the third indication information, a change of the system information.
  • the communications device re-receives the network device. Send the MIB and get the stored SIB1-BR.
  • the communication device acquires the stored MIB, and according to the The stored MIB re-receives the SIB1-BR sent by the network device. Then, the communication device acquires other SIBs than the re-received SIB1-BR according to the re-received SIB1-BR.
  • the method for the communication device to obtain the SIBs other than the re-received SIB1-BR according to the re-received SIB1-BR may refer to the foregoing description, and details are not described herein again.
  • the communication device can determine whether the system information changes according to the first indication information, and whether the MIB is changed according to the second indication information, or whether the SIB1-BR/other SIB changes, that is, the determination is performed. System information that has changed, and system information that has changed. In this way, for the system information that has not changed, the communication device can directly obtain the stored system information, and does not need to communicate with the network device, thereby effectively reducing the time consumption.
  • the embodiment of the present application provides a network device, where the network device is configured to perform the steps performed by the network device in the foregoing system information indication method.
  • the network device provided by the embodiment of the present application may include a module corresponding to the corresponding step.
  • the embodiment of the present application may perform the division of the function module on the network device according to the foregoing method example.
  • each function module may be divided according to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and may be further divided in actual implementation.
  • FIG. 7 shows a possible structural diagram of the network device involved in the foregoing embodiment in the case where the respective functional modules are divided by corresponding functions.
  • the network device includes a determining unit 70 and a transmitting unit 71.
  • the determining unit 70 is configured to support the network device to perform S500 in the above embodiment, and/or other processes for the techniques described herein; the transmitting unit 71 is configured to support the network device to perform S501 in the above embodiment, and/ Or other processes for the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
  • the network device provided by the embodiment of the present application includes but is not limited to the foregoing module, for example, the network device may further include a storage unit 72.
  • the storage unit 72 can be used to store program code and data of the network device.
  • FIG. 8 shows a possible structural diagram of the network device involved in the above embodiment.
  • the network device includes a processing module 80 and a communication module 81.
  • the processing module 80 is configured to control and manage the actions of the network device.
  • the processing module 80 is configured to support the network device to perform S500 in the foregoing method embodiments, and/or other processes for the techniques described herein.
  • the communication module 81 is configured to support the network device to communicate with the communication device.
  • the communication module 81 is configured to support the network device to perform S501 in the foregoing method embodiment.
  • the network device can also include a storage module 82 that can be used to store program code and data for the network device.
  • the processing module 80 may be a processor or a controller, and may be, for example, a central processing unit (CPU) or a digital signal processor (DSP). It is possible to implement or perform various exemplary logical blocks, modules and circuits described in connection with the disclosure of the embodiments of the present application.
  • the communication module 81 can be a communication interface, a transceiver circuit, a communication interface, or the like.
  • the storage module 82 can be a memory.
  • the network device involved in the embodiment of the present application may be the network device shown in FIG.
  • the network device includes a communication interface 90, a processor 91, and a memory 92.
  • the communication interface 90, the processor 91 and the memory 92 are connected by the system bus 93, and communication with each other is completed.
  • the network device When the network device is operating, the network device performs a system information indication method of the embodiment as shown in FIG. 5 or 6.
  • the network device performs a system information indication method of the embodiment as shown in FIG. 5 or 6.
  • the specific system information indication method refer to the related description in the foregoing embodiment shown in FIG. 5 or FIG. 6 , and details are not described herein again.
  • the communication interface 90 is used to communicate with other devices or communication networks, such as Ethernet, WLAN, and the like.
  • the memory 92 is used to store software programs and application modules, and the processor 91 executes various functional applications and data processing of the network devices by running software programs and application modules stored in the memory 92.
  • the memory 92 may mainly include a stored program area 920, wherein the stored program area 920 may store an operating system, an application required for at least one function, such as transmitting target information, and the like.
  • the memory 92 can be a read-only memory (ROM), or other types of static storage devices that can store static information and instructions, a random access memory (RAM), or can store information and instructions.
  • ROM read-only memory
  • RAM random access memory
  • Other types of dynamic storage devices which may also be Electrically Erasable Programmable Read-Only Memory (EEPROM), magnetic disk storage media or other magnetic storage devices, or can be used to include or store instructions or The desired program code in the form of a data structure and any other medium that can be accessed by the communication device, but is not limited thereto.
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • Memory 92 may be present independently and coupled to processor 91 via system bus 93.
  • the memory 92 can also be integrated with the processor 91.
  • the processor 91 is the control center of the network device.
  • the processor 91 connects various portions of the entire network device using various interfaces and lines, and executes each of the network devices by running or executing a software program and/or application module stored in the memory 92, and calling data stored in the memory 92.
  • the processor 91 may include one or more CPUs, for example, the processor 91 in FIG. 9 includes a CPU 0 and a CPU 1.
  • the system bus 93 can be divided into an address bus, a data bus, a control bus, and the like. For the sake of clarity in the embodiments of the present application, various buses are illustrated as the system bus 93 in FIG.
  • Another embodiment of the present application also provides a computer readable storage medium comprising one or more program codes, the one or more programs comprising instructions, when a processor in a network device is executing the program At the time of the code, the network device performs the system information indication method as shown in FIG. 5 or FIG. 6.
  • a computer program product comprising computer executed instructions stored in a computer readable storage medium; at least one processor of the network device can be from the computer The readable storage medium reads the computer execution instructions, and the at least one processor executes the computer to execute the instructions such that the network device implements the step of executing the network device in the system information indication method illustrated in FIG. 5 or 6.
  • the embodiment of the present application provides a communication device, which is used to perform the steps performed by the communication device in the above system indication method.
  • the communication device provided by the embodiment of the present application may include a module corresponding to the corresponding step.
  • the embodiment of the present application may divide the function module into the communication device according to the foregoing method example.
  • each function module may be divided according to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and may be further divided in actual implementation.
  • FIG. 10 shows a possible structural diagram of the communication device involved in the above embodiment in the case where the respective functional modules are divided by corresponding functions.
  • the communication device includes a receiving unit 100, a processing unit 101, and a storage unit 102.
  • the receiving unit 100 is configured to support the communication device to perform S501 in the above embodiment, and/or other processes for the techniques described herein;
  • the processing unit 101 is configured to support the communication device to perform S502, S502' in the above embodiment. And/or S503, and/or other processes for the techniques described herein;
  • storage unit 102 stores program code and data for the communication device. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.
  • the processing unit 101 in the embodiment of the present application may be the processor 31 in FIG. 3, the receiving unit 100 may be the antenna in FIG. 3, and the storage unit 102 may be the memory 34.
  • the communication device When the communication device is in operation, the communication device performs a system information indication method as shown in FIG. 5 or 6.
  • a system information indication method As shown in FIG. 5 or 6.
  • FIG. 5 or 6 For the specific system information indication method, refer to the related description in the foregoing embodiment shown in FIG. 5 or FIG. 6 , and details are not described herein again.
  • Another embodiment of the present application also provides a computer readable storage medium comprising one or more program codes, the one or more programs comprising instructions, when a processor in a communication device is executing the program At the time of the code, the communication device executes the system information indicating method as shown in FIG. 5 or 6.
  • a computer program product comprising computer executed instructions stored in a computer readable storage medium; at least one processor of the communication device can be from a computer
  • the readable storage medium reads the computer execution instructions, and the at least one processor executes the computer to execute the instructions such that the communication device implements the step of executing the communication device in the system information indication method illustrated in FIG. 5 or 6.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • a computer readable storage medium A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a flash memory, a mobile hard disk, a read only memory, a random access memory, a magnetic disk, or an optical disk, and the like, which can store program codes.

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Abstract

本申请实施例提供一种系统信息指示方法及装置，涉及通信技术领域，能够解决MTC UE获取系统信息消耗的时间较大的问题。该方法包括：确定目标信息，所述目标信息包括第一指示信息和第二指示信息，所述第一指示信息用于指示系统信息是否发生变化，所述第二指示信息用于指示MIB是否发生变化，或者，所述第二指示信息用于指示所述MIB中的SIB1-BR的调度信息；向通信设备发送所述目标信息。

Description

一种系统信息指示方法及装置
本申请要求于2017年09月30日提交中国专利局、申请号为PCT/CN2017/104854、发明名称为“一种系统信息指示方法及装置”的国际专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，尤其涉及一种系统信息指示方法及装置。
背景技术
长期演进计划(Long Term Evolution，LTE)系统能够支持机器类通信(Machine Type Communication，MTC)业务。在支持MTC业务的LTE系统中，机器类用户设备(User Equipment，UE)称为MTC UE。
MTC UE通过接收基站发送的包括系统信息修改(systemInfoModification)或systemInfoModification-eDRX的寻呼(Paging)消息(或直接指示信息(Direct Indication Information，DII))确定系统信息(System Information，SI)是否发生变化。systemInfoModification用于指示除系统信息块(System Information Block，SIB)10、SIB11、SIB12和SIB14外的其他SIB在下一个变化周期中是否会发生变化。systemInfoModification-eDRX与systemInfoModification类似，不同的是，systemInfoModification-eDRX与配置了增强型非连续接收(enhanced Discontinuous Reception，eDRX)模式的MTC UE对应。
现有技术中，当MTC UE确定主信息块(Master Information Block，MIB)、SIB1、其他SIB(除SIB10、SIB11、SIB12、SIB14外)中的一个或多个发生变化时，MTC UE首先接收并读取承载在物理广播信道(Physical Broadcast Channel，PBCH)中的MIB；然后，MTC UE根据获取到的MIB，确定基站发送带宽压缩的系统信息块1(Bandwidth-Reduced System Information Block 1，SIB1-BR)所使用的调度信息，从而根据确定出的调度信息接收并读取SIB1-BR，SIB1-BR包括其他SIB的调度信息；最后，MTC UE根据获取到的SIB1-BR，判断其他SIB是否发生变化，如果发生了变化，则进一步获取其他的SIB。
采用上述方法，MTC UE根据寻呼消息或DII确定出系统信息发生变化后，均需执行上述过程以获取变化后的系统信息，时间消耗较大，进而影响MTC UE的响应时间，降低了用户的体验。
发明内容
本申请提供一种系统信息指示方法及装置，能够解决MTC UE获取系统信息消耗的时间较大的问题。
为达到上述目的，本申请采用如下技术方案：
第一方面，提供一种系统信息的获取方法，网络设备在确定出包括第一指示信息和第二指示信息的目标信息后，向通信设备发送该目标信息。这里，第一指示信息用于指示系统信息是否发生变化，第二指示信息用于指示MIB是否发生变化，或者，第 二指示信息用于指示MIB中的SIB1-BR的调度信息。
由于网络设备确定出的目标信息包括用于指示系统信息是否发生变化的第一指示信息、以及用于指示MIB是否发生变化或者用于指示MIB中的SIB1-BR的调度信息的第二指示信息，因此，在网络设备向通信设备发送该目标信息后，通信设备能够确定出在系统变化的场景中系统信息变化的细节，也就是说，通信设备能够确定出未发生变化的系统信息，以及发生变化的系统信息。这样，对于未发生变化的系统信息而言，通信设备直接获取存储的该系统信息即可，而无需再与网络设备通信，有效的减少了时间的消耗。
可选的，在本申请的一种可能的实现方式中，上述第二指示信息用于指示MIB是否发生变化时，第二指示信息用于指示MIB中的SIB1-BR的调度信息是否发生变化，或者，第二指示信息用于指示MIB中除系统帧号(System Frame Number，SFN)外的其他信息是否发生变化，或者，第二指示信息用于指示MIB中除系统信息变化指示信息外的其他信息是否发生变化；或者，第二指示信息用于指示MIB中除SFN和系统信息变化指示信息外的其他信息是否发生变化。
MIB包括SIB1-BR的调度信息以及周期性变化的SFN，因此，MIB中的SIB1-BR的调度信息是否发生变化相当于MIB是否发生变化，同理，MIB中除SFN外的其他信息是否发生变化相当于MIB是否发生变化。这样的话，在第二指示信息指示MIB是否发生变化时，该第二指示信息可用于指示MIB中的SIB1-BR的调度信息是否发生变化，也可用于指示MIB中除SFN外的其他信息是否发生变化。可选的，MIB还包括系统信息变化指示信息，该系统信息变化指示信息指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB在过去的一段时间内是否发生变化，或者指示SIB1-BR在过去的一段时间内是否发生变化，但不指示MIB中除该系统信息变化指示信息之外的其他信息是否发生变化。这样的话，在第二指示信息指示MIB是否发生变化时，该第二指示信息也可用于指示除系统信息变化指示信息外的其他信息是否发生变化，还可用于指示MIB中除SFN和系统信息变化指示信息外的其他信息是否发生变化。在这种情况下，第二指示信息的大小可以为1比特。
可选的，在本申请的另一种可能的实现方式中，上述第二指示信息用于指示MIB是否发生变化时，第二指示信息包括第一标识和第二标识，第一标识指示SIB1-BR的传输块大小是否发生变化，第二标识指示SIB1-BR的重复次数是否发生变化。
MIB包括SIB1-BR的调度信息，SIB1-BR的调度信息包括SIB1-BR的传输块大小和SIB1-BR的重复次数，因此，在第二指示信息用于指示MIB是否发生变化时，第二指示信息可包括用于指示SIB1-BR的传输块大小是否发生变化的第一标识和用于指示SIB1-BR的重复次数是否发生变化的第二标识。在这种情况下，第二指示信息的大小可以为2比特。
可选的，在本申请的另一种可能的实现方式中，上述第二指示信息用于指示MIB中的SIB1-BR的调度信息时；当系统带宽小于5兆赫兹时，第二指示信息用于指示SIB1-BR的传输块大小，第二指示信息的大小为3比特；当系统带宽大于或等于5兆赫兹时，第二指示信息的大小为5比特，第二指示信息用于指示SIB1-BR的传输块大小和重复次数，或者，第二指示信息包括大小为2比特的第一子信息和大小为3比特 的第二子信息，第一子信息用于指示SIB1-BR的重复次数，第二子信息用于指示SIB1-BR的传输块大小。
可选的，在本申请的另一种可能的实现方式中，本申请中的目标信息还包括第三指示信息，第三指示信息用于指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化，或者用于指示SIB1-BR是否发生变化。由于除了SIB1-BR、SIB10、SIB12、以及SIB14之外的其他SIB发生变化都会引起SIB1-BR的变化，因此，第三指示信息可用于指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化，也可用于指示SIB1-BR是否发生变化。在这种场景中，通信设备可根据第三指示信息确定出未发生变化的SIB，这样，通信设备可获取存储的未发生变化的SIB，而无需再与网络设备通信，减少了时间的浪费。
可选的，在本申请的另一种可能的实现方式中，DII或寻呼消息包括目标信息；或者，承载了DII的下行控制信息(Downlink Control Information，DCI)包括目标信息。本申请中的第二指示信息占用了DII，或承载了DII的DCI中的冗余比特。
第二方面，提供一种网络设备，该网络设备包括确定单元和发送单元。
本申请提供的各个单元模块所实现的功能具体如下：
上述确定单元，用于确定目标信息，目标信息包括第一指示信息和第二指示信息，第一指示信息用于指示系统信息是否发生变化，第二指示信息用于指示MIB是否发生变化，或者，第二指示信息用于指示MIB中的SIB1-BR的调度信息。上述发送单元，用于向通信设备发送上述确定单元确定出的目标信息。
进一步地，在本申请的一种可能的实现方式中，上述第二指示信息用于指示MIB是否发生变化时，第二指示信息用于指示MIB中的SIB1-BR的调度信息是否发生变化，或者，第二指示信息用于指示MIB中除SFN外的其他信息是否发生变化，或者，第二指示信息用于指示MIB中除系统信息变化指示信息外的其他信息是否发生变化；或者，第二指示信息用于指示MIB中除SFN和系统信息变化指示信息外的其他信息是否发生变化。
进一步地，在本申请的另一种可能的实现方式中，上述第二指示信息用于指示MIB是否发生变化时，第二指示信息包括第一标识和第二标识，第一标识指示SIB1-BR的传输块大小是否发生变化，第二标识指示SIB1-BR的重复次数是否发生变化。
进一步地，在本申请的另一种可能的实现方式中，上述第二指示信息用于指示MIB中的SIB1-BR的调度信息时；当系统带宽小于5兆赫兹时，第二指示信息用于指示SIB1-BR的传输块大小，第二指示信息的大小为3比特；当系统带宽大于或等于5兆赫兹时，第二指示信息的大小为5比特，第二指示信息用于指示SIB1-BR的传输块大小和重复次数，或者，第二指示信息包括大小为2比特的第一子信息和大小为3比特的第二子信息，第一子信息用于指示SIB1-BR的重复次数，第二子信息用于指示SIB1-BR的传输块大小。
进一步地，在本申请的另一种可能的实现方式中，本申请中的目标信息还包括第三指示信息，第三指示信息用于指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化或者用于指示SIB1-BR是否发生变化。
进一步地，在本申请的另一种可能的实现方式中，DII或寻呼消息包括目标信息； 或者，承载了DII的DCI包括目标信息。
第三方面，提供一种网络设备，该网络设备包括：一个或多个处理器、存储器和通信接口。存储器、通信接口与一个或多个处理器连接。该网络设备通过通信接口与其他设备通信。存储器用于存储计算机程序代码，计算机程序代码包括指令，当一个或多个处理器执行存储器存储的指令时，网络设备执行如上述第一方面及其任一种可能的实现方式的系统信息指示方法。
第四方面，提供一种计算机存储介质，该计算机存储介质中存储有计算机程序代码。当第三方面中的网络设备的处理器执行该计算机程序代码时，网络设备执行如上述第一方面及其任一种可能的实现方式的系统信息指示方法。
第五方面，还提供一种包括指令的计算机程序产品，当其在网络设备上运行时，使得网络设备执行如上述第一方面及其任一种可能的实现方式的系统信息指示方法。
在本申请中，上述网络设备的名字对设备或功能模块本身不构成限定，在实际实现中，这些设备或功能模块可以以其他名称出现。只要各个设备或功能模块的功能和本申请类似，属于本申请权利要求及其等同技术的范围之内。
本申请中第二方面、第三方面、第四方面、第五方面及其各种实现方式的具体描述，可以参考第一方面及其各种实现方式中的详细描述；并且，第二方面、第三方面、第四方面、第五方面及其各种实现方式的有益效果，可以参考第一方面及其各种实现方式中的有益效果分析，此处不再赘述。
第六方面，提供一种系统信息指示方法，通信设备首先接收网络设备发送的包括第一指示信息和第二指示信息的目标信息，该第一指示信息用于指示系统信息是否发生变化，该第二指示信息用于指示MIB是否发生变化，或者，该第二指示信息用于指示MIB中的SIB1-BR的调度信息；然后，该通信设备根据第一指示信息和第二指示信息，确定系统信息的变化情况；最后，该通信设备根据系统信息的变化情况，获取存储的系统信息和/或重新接收网络设备发送的系统信息。
由于目标信息中的第一指示信息用于指示系统信息是否发生变化的第一指示信息、第二指示信息用于指示MIB是否发生变化或者用于指示MIB中的SIB1-BR的调度信息，因此，通信设备根据第一指示信息和第二指示信息，能够确定在系统信息变化的场景中系统信息变化的细节，也就是说，通信设备能够确定出未发生变化的系统信息，以及发生变化的系统信息。这样，对于未发生变化的系统信息而言，通信设备直接获取存储的该系统信息即可，而无需再与网络设备通信，有效的减少了时间的消耗。
可选的，在本申请的一种可能的实现方式中，上述第二指示信息用于指示MIB是否发生变化时，第二指示信息用于指示MIB中的SIB1-BR的调度信息是否发生变化，或者，第二指示信息用于指示MIB中除SFN外的其他信息是否发生变化，或者，第二指示信息用于指示MIB中除系统信息变化指示信息外的其他信息是否发生变化；或者，第二指示信息用于指示MIB中除SFN和系统信息变化指示信息外的其他信息是否发生变化。在这种场景中，上述“通信设备根据系统信息的变化情况，获取存储的系统信息和重新接收网络设备发送的系统信息”的方法为：当第一指示信息指示系统信息发生变化、且第二指示信息指示MIB中的SIB1-BR的调度信息或者MIB中除SFN外的其他信息未发生变化时，或者，当MIB中除系统信息变化指示信息外的其他信息 未发生变化时，或者，当MIB中除SFN和系统信息变化指示信息外的其他信息未发生变化时，通信设备获取存储的MIB；通信设备根据存储的MIB，重新接收网络设备发送的SIB1-BR；根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB。
具体的，上述“通信设备根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB”的方法可以为：通信设备判断重新接收到的SIB1-BR中的系统信息标签值systemInfoValueTag与存储的systemInfoValueTag是否相同，或者，判断重新接收到的SIB1-BR中的systemInfoValueTagSI与存储的systemInfoValueTagSI是否相同；若相同，通信设备获取存储的除重新接收到的SIB1-BR之外的一个或多个其他SIB；若不同，通信设备重新接收网络设备发送的除重新接收到的SIB1-BR之外的一个或多个其他SIB。
这种场景中，通信设备无需再与网络设备通信以获取MIB，而是直接获取该通信设备存储的MIB，减少了时间的浪费。
可选的，在本申请的另一种可能的实现方式中，上述第二指示信息用于指示MIB是否发生变化时，第二指示信息包括第一标识和第二标识，第一标识用于指示SIB1-BR的传输块大小是否发生变化，第二标识用于指示SIB1-BR的重复次数是否发生变化。在这种场景中，上述“通信设备根据系统信息的变化情况，获取存储的系统信息和/或重新接收网络设备发送的系统信息”的方法包括：当第一指示信息用于指示系统信息发生变化、第一标识用于指示SIB1-BR的传输块大小未发生变化、且第二标识用于指示SIB1-BR的重复次数未发生变化时，通信设备获取存储的MIB；通信设备根据存储的MIB，重新接收网络设备发送的SIB1-BR；通信设备根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB。当第一指示信息用于指示系统信息发生变化、第一标识用于指示SIB1-BR的传输块大小发生变化，且第二标识用于指示SIB1-BR的重复次数未发生变化时，通信设备同步重新接收网络设备发送的MIB和SIB1-BR；通信设备根据重新接收到的MIB和重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB。
可选的，在本申请的另一种可能的实现方式中，上述第二指示信息用于指示MIB中的SIB1-BR的调度信息时；当系统带宽小于5兆赫兹时，第二指示信息用于指示SIB1-BR的传输块大小，第二指示信息的大小为3比特；当系统带宽大于或等于5兆赫兹时，第二指示信息的大小为5比特，第二指示信息用于指示SIB1-BR的传输块大小和重复次数，或者，第二指示信息包括大小为2比特的第一子信息和大小为3比特的第二子信息，第一子信息用于指示SIB1-BR的重复次数，第二子信息用于指示SIB1-BR的传输块大小。在这种场景中，上述“通信设备根据第一指示信息和第二指示信息，确定系统信息的变化情况”的方法包括：当第一指示信息指示系统信息发生变化时，通信设备根据第二指示信息获取SIB1-BR的调度信息，并根据该调度信息获取SIB1-BR。
这种场景中，通信设备无需再与网络设备通信以获取MIB，而是直接获取该通信设备存储的MIB，减少了时间的浪费。
可选的，在本申请的另一种可能的实现方式中，本申请中的目标信息还包括第三 指示信息，第三指示信息用于指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化或者用于指示SIB1-BR是否发生变化。在这种场景中，上述“通信设备根据第一指示信息和第二指示信息，确定系统信息的变化情况”的方法包括：通信设备根据第一指示信息、第二指示信息和第三指示信息，确定系统信息的变化情况。相应的，上述“通信设备根据系统信息的变化情况，获取存储的系统信息和重新接收网络设备发送的系统信息”的方法包括：当第一指示信息指示系统信息发生变化、第二指示信息用于指示MIB发生变化、且第三指示信息用于指示其他SIB或SIB1-BR未发生变化时，通信设备重新接收网络设备发送的MIB；通信设备获取存储的SIB1-BR。当第一指示信息指示系统信息发生变化、第二指示信息用于指示MIB未发生变化、且第三指示信息用于指示其他SIB或SIB1-BR发生变化时，通信设备获取存储的MIB；通信设备根据存储的MIB，重新接收网络设备发送的SIB1-BR；通信设备根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB。
可选的，在本申请的另一种可能的实现方式中，DII或寻呼消息包括目标信息；或者，承载了DII的DCI包括目标信息。
第七方面，提供一种通信设备，该通信设备包括接收单元、处理单元和存储单元。
本申请提供的各个单元模块所实现的功能具体如下：
上述接收单元，用于接收网络设备发送的目标信息，目标信息包括第一指示信息和第二指示信息，第一指示信息用于指示系统信息是否发生变化，第二指示信息用于指示MIB是否发生变化，或者，第二指示信息用于指示MIB中的SIB1-BR的调度信息。上述处理单元，用于根据上述接收单元接收到的第一指示信息和第二指示信息，确定系统信息的变化情况。上述处理单元，还用于根据确定出的系统信息的变化情况，获取通信设备中的存储单元存储的系统信息和/或通过上述接收单元重新接收网络设备发送的系统信息。
进一步地，在本申请的一种可能的实现方式中，上述第二指示信息用于指示MIB是否发生变化时，第二指示信息用于指示MIB中的SIB1-BR的调度信息是否发生变化，或者，第二指示信息用于指示MIB中除SFN外的其他信息是否发生变化，或者，第二指示信息用于指示MIB中除系统信息变化指示信息外的其他信息是否发生变化；或者，第二指示信息用于指示MIB中除SFN和系统信息变化指示信息外的其他信息是否发生变化。在这种场景中，上述处理单元用于获取存储的系统信息和重新接收网络设备发送的系统信息，包括：用于当第一指示信息指示系统信息发生变化、且第二指示信息指示MIB中的SIB1-BR的调度信息或者MIB中除系统帧号SFN外的其他信息未发生变化时，或者，当MIB中除系统信息变化指示信息外的其他信息未发生变化时，或者，当MIB中除SFN和系统信息变化指示信息外的其他信息未发生变化时，获取存储单元存储的MIB；根据存储的MIB，通过上述接收单元重新接收网络设备发送的SIB1-BR；根据重新接收到的SIB1-BR，通过上述接收单元重新接收除重新接收到的SIB1-BR之外的其他一个或多个SIB。
进一步地，在本申请的另一种可能的实现方式中，上述第二指示信息用于指示MIB是否发生变化时，第二指示信息包括第一标识和第二标识，第一标识用于指示SIB1-BR的传输块大小是否发生变化，第二标识用于指示SIB1-BR的重复次数是否发生变化。 在这种场景中，处理单元用于获取存储的系统信息和/或重新接收网络设备发送的系统信息，包括：当第一指示信息用于指示系统信息发生变化、第一标识用于指示SIB1-BR的传输块大小未发生变化、且第二标识用于指示SIB1-BR的重复次数未发生变化时，获取存储的MIB；根据存储的MIB，重新接收网络设备发送的SIB1-BR；根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB；以及具体用于：当第一指示信息用于指示系统信息发生变化、第一标识用于指示SIB1-BR的传输块大小发生变化，且第二标识用于指示SIB1-BR的重复次数未发生变化时，同步重新接收网络设备发送的MIB和SIB1-BR；根据重新接收到的MIB和重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB。
进一步地，在本申请的另一种可能的实现方式中，上述第二指示信息用于指示MIB中的SIB1-BR的调度信息时；当系统带宽小于5兆赫兹时，第二指示信息用于指示SIB1-BR的传输块大小，第二指示信息的大小为3比特；当系统带宽大于或等于5兆赫兹时，第二指示信息的大小为5比特，第二指示信息用于指示SIB1-BR的传输块大小和重复次数，或者，第二指示信息包括大小为2比特的第一子信息和大小为3比特的第二子信息，第一子信息用于指示SIB1-BR的重复次数，第二子信息用于指示SIB1-BR的传输块大小。在这种场景中，上述处理单元用于根据上述接收单元接收到的第一指示信息和第二指示信息确定系统信息的变化情况，包括：用于当第一指示信息指示系统信息发生变化时，根据第二指示信息获取SIB1-BR的调度信息，并根据调度信息获取SIB1-BR。
进一步地，在本申请的另一种可能的实现方式中，本申请中的目标信息还包括第三指示信息，该第三指示信息用于指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化或者用于指示SIB1-BR是否发生变化。在这种场景中，上述处理单元具体用于根据第一指示信息、第二指示信息和第三指示信息，确定系统信息的变化情况；上述处理单元用于获取存储的系统信息和重新接收网络设备发送的系统信息，包括：当第一指示信息指示系统信息发生变化、第二指示信息用于指示MIB发生变化、且第三指示信息用于指示其他SIB或SIB1-BR未发生变化时，重新接收网络设备发送的MIB；获取存储的SIB1-BR；以及具体用于当第一指示信息指示系统信息发生变化、第二指示信息用于指示MIB未发生变化、且第三指示信息用于指示其他SIB或SIB1-BR发生变化时，获取存储的MIB；根据存储的MIB，重新接收网络设备发送的SIB1-BR；根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB。
进一步地，在本申请的另一种可能的实现方式中，DII或寻呼消息包括目标信息；或者，承载了DII的DCI包括目标信息。
第八方面，提供一种通信设备，该通信设备包括：一个或多个处理器、存储器和通信接口。存储器、通信接口与一个或多个处理器连接。该通信设备通过通信接口与其他设备通信。存储器用于存储计算机程序代码，计算机程序代码包括指令，当一个或多个处理器执行存储器存储的指令时，通信设备执行如上述第六方面及其任一种可能的实现方式的系统信息指示方法。
第九方面，提供一种计算机存储介质，该计算机存储介质中存储有计算机程序代码。当第八方面中的通信设备的处理器执行该计算机程序代码时，通信设备执行如上 述第六方面及其任一种可能的实现方式的系统信息指示方法。
第十方面，还提供一种包括指令的计算机程序产品，当其在通信设备上运行时，使得通信设备执行如上述第六方面及其任一种可能的实现方式的系统信息指示方法。
在本申请中，上述通信设备的名字对设备或功能模块本身不构成限定，在实际实现中，这些设备或功能模块可以以其他名称出现。只要各个设备或功能模块的功能和本申请类似，属于本申请权利要求及其等同技术的范围之内。
本申请中第七方面、第八方面、第九方面、第十方面及其各种实现方式的具体描述，可以参考第六方面及其各种实现方式中的详细描述；并且，第七方面、第八方面、第九方面、第十方面及其各种实现方式的有益效果，可以参考第六方面及其各种实现方式中的有益效果分析，此处不再赘述。
本申请实施例的这些方面或其他方面在以下的描述中会更加简明易懂。
附图说明
图1为现有技术中通信设备获取系统信息的流程示意图；
图2为本申请实施例提供的通信系统的结构示意图；
图3为本申请实施例提供的智能手机的硬件结构示意图；
图4为本申请实施例提供的基站的硬件结构示意图；
图5为本申请实施例提供的系统信息指示方法的流程示意图一；
图6为本申请实施例提供的系统信息指示方法的流程示意图二；
图7为本申请实施例中网络设备的结构示意图一；
图8为本申请实施例中网络设备的结构示意图二；
图9为本申请实施例中网络设备的结构示意图三；
图10为本申请实施例中通信设备的结构示意图。
具体实施方式
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”和“第三”等是用于区别不同对象，而不是用于限定特定顺序。
在本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
目前，在LTE系统以及长期演进的演进(Long Term Evolution Advanced，LTE-A)系统中，基站(Base Station，BS，或enhanced Node B，eNB)周期性地向UE发送SI，以便于UE获知系统的一些相关信息。系统信息包括最基本、最重要的系统信息和一般的系统信息。最基本、最重要的系统信息称为MIB，MIB承载于物理广播信道(Physical Broadcast Channel，PBCH)中发送。一般的系统信息包括多个SIB，例如SIB1、SIB2、……、SIB21等。SIB1包括除SIB1之外的其他SIB的调度信息，该调度信息包括其他SIB的调度周期、接收窗口大小、偏置参数中的一个或多个。也就是说，UE需要读取SIB1，才能够确定除SIB1之外的其他SIB是否存在以及其他SIB在哪些时频位置上传输。
MTC是指通过部署具有一定感知、计算、执行和通信能力的各种设备，以获取物 理世界的信息，通过网络实现信息传输、协同和处理，从而实现人与物、物与物的互联的技术。现有的LTE系统能够支持MTC业务。LTE系统中的机器类通信UE称为MTC UE。
MTC UE可以为带宽减少的低复杂度UE(Bandwidth-reduced Low-complexity UE，BL UE)，也可以为覆盖增强的UE(Coverage Enhancement UE，CE UE)。MTC UE的带宽较窄，通常小于系统带宽。
由于MTC UE的带宽通常小于系统带宽，MTC UE通过检测机器类型通信的物理下行控制信道(MTC Physical Downlink Control Channel，MPDCCH)来获取控制信息，而不是通过检测物理下行信道(Physical Downlink Control Channel，PDCCH)来获取控制信息。为此，基站还会向MTC UE发送SIB1-BR的内容与SIB1的内容相同，但传输带宽仅为1个窄带(Narrowband，NB)。MTC UE在接收到SIB1-BR后，可根据SIB1-BR获得其他SIB的调度信息。SIB1-BR的调度信息schedulingInfoSIB1-BR承载于MIB中，schedulingInfoSIB1-BR的大小为5比特，schedulingInfoSIB1-BR包括SIB1-BR的传输块大小(Transport Block Size，TBS)以及SIB1-BR的重复次数。MTC UE通过读取MIB中的schedulingInfoSIB1-BR信息，确定SIB1-BR的存在、SIB1-BR在哪些时频资源上传输以及SIB1-BR的传输块大小。
除了其他SIB(除SIB1-BR之外)的调度信息之外，SIB1-BR还包括一个5比特的系统信息标签值(systemInfoValueTag)以及若干个2比特的systemInfoValueTagSI。系统信息(除MIB、SIB1、SIB10、SIB11、SIB12、SIB14外)每发生一次改变，则systemInfoValueTag的数值加1。systemInfoValueTag的取值范围为{0、1、2、……、31}，超过31后回到0重新开始。这样，当MTU UE获取到一个systemInfoValueTag时(比如当MTU UE离开小区服务范围一段时间再回到该小区后)，该MTU UE比较其获取到的systemInfoValueTag的数值与之前记录的systemInfoValueTag是否相同，即MTU UE判断当前系统信息与存储的系统信息是否相同；如果不同，该MTU UE则确定当前系统信息相较其存储的系统信息发生了改变，需要考虑重新获取更新后的系统信息。每个systemInfoValueTagSI对应一个SIB，用于指示该SIB的状态，MTU UE根据SIB1-BR包括的systemInfoValueTagSI能够确定出哪些SIB发生了变化。
综上所述，MIB包括了SIB1-BR的调度信息，但MIB无法指示SIB1-BR是否发生了变化，SIB1-BR包括了其他SIB(除SIB1-BR之外)的调度信息，以及其他SIB的systemInfoValueTagSI。这样的话，如图1所示，MTU UE在接入小区，并完成主同步信号(Primary Synchronization Signal，PSS)/辅同步信号(Secondary Synchronization Signal，SSS)同步后，该MTU UE需要获取到MIB才能确定出SIB1-BR的传输资源，进而解调SIB1-BR。MTU UE在获取到SIB1-BR后，才能够获取到传输其他SIB的资源信息，并确定出其他SIB是否发生了变化。
具体的，MIB除了包括SIB1-BR的调度信息schedulingInfoSIB1-BR，还包括下行带宽(Download-Bandwidth，DL-Bandwidth)、物理混合自动重传指示信道配置信息(Physical Hybrid ARQ Indicator Channel-config，PHICH-config)以及SFN。一般的，在MTU UE与基站的通信过程中，DL-Bandwidth的数值不会发生变化，PHICH-config的数值几乎不会发生变化，即使发生了变化对MTU UE而言也不会有影响，SFN的数 值周期性发生变化，其取值范围为{0～1023}，对于已经与系统同步的MTU UE而言，该MTU UE能自行确定出SFN的数值。
现有技术中，MTU LTE系统中配置了MTU UE在一些寻呼时机(Paging Occasion，PO)上开始接收承载了下行控制信息(Downlink Control Information，DCI)format 6-2格式的MPDCCH，该MPDCCH用于指示寻呼(Paging)消息的调度信息，这样，MTU UE根据该Paging消息确定其是否被寻呼；或者，该MPDCCH不用于指示寻呼消息，而是承载了直接指示信息(Direct Indication Information，DII)，用于指示系统信息是否发生了变化。
若MPDCCH指示了一个寻呼消息的调度信息，MTU UE可以通过该寻呼消息确定系统信息是否有变化。具体的，寻呼消息包括一个1比特的系统信息修改(systemInfoModification)，该systemInfoModification用于指示除SIB10、SIB11、SIB12和SIB14外的其他系统信息在下一个变化周期中是否会发生变化。需要说明的是，系统信息发生变化的时刻不是任意的，现有的标准中规定了系统信息变化的周期，系统信息只能在这些周期开始时发生变化。可选的，寻呼消息还可以包括systemInfoModification-eDRX，systemInfoModification-eDRX用于向配置了eDRX模式的MTU UE指示系统信息是否发生了变化。可选的，寻呼消息可同时包括systemInfoModification和systemInfoModification-eDRX，MTU UE根据自身是否配置了eDRX而决定参考哪个信息。
若MPDCCH承载一个DII，该DII为8比特，具体包括了systemInfoModification、地震及海啸预警系统指示(earthquake and tsunami warning system Indication，etws-Indication)、商用移动警报系统指示(commercial mobile alert system Indication，cmas-Indication)、扩展接入禁止参数变化(extended access barring Parameter Modification，eab-ParamModification)以及systemInfoModification-eDRX。
示例性的，表1示出了上述8比特的DII的格式。从表1中可以看出，DII的冗余比特有3比特，分别为比特位6、比特位7、比特位8。
表1
比特位 内容
1 systemInfoModification
2 etws-Indication
3 cmas-Indication
4 eab-ParamModification
5 systemInfoModification-eDRX
6、7、8 未使用
可选的，承载DII的DCI的格式为DCI format 6-2。实际应用中，DCI format 6-2格式的信息的大小是随着系统带宽的变化而变化的。承载有DII的DCI中的冗余比特数至少为3。这里，冗余比特数包括DII中未使用的比特数和DCI format 6-2中除DII外的保留比特数。
示例性的，表2示出了在不同系统带宽中，传输DII的DCI format 6-2包括的比特数以及冗余比特数。当系统带宽为10HZ时，承载有DII的DCI包括11个比特，其 中，11比特中有6比特为冗余比特，6个冗余比特中有3个比特为DII中未使用的比特，另外3个比特为除DII外的保留比特数。
表2
Figure PCTCN2018082048-appb-000001
综上所述，MTU UE根据寻呼消息，或DII，能够确定出系统信息是否发生变化。在MTU UE根据寻呼消息或DII确定系统信息发生变化的情况下，MTU UE只能根据systemInfoModification或systemInfoModification-eDRX确定系统信息发生变化。结合图1，当MTU UE根据systemInfoModification或systemInfoModification-eDRX确定系统信息发生变化后，该MTC UE首先读取承载在PBCH中的MIB；然后，MTC UE根据获取到的MIB，确定基站发送SIB1-BR所使用的资源信息，从而根据确定出的资源信息读取SIB1-BR；最后，MTC UE根据获取到的SIB1-BR，判断其他SIB是否发生变化，如果发生了变化，则进一步获取其他的SIB。
由于MTU UE只能根据systemInfoModification或systemInfoModification-eDRX确定系统信息是否发生变化，而无法获取到系统信息变化的相关内容，因此，MTU UE需要执行图1示出的流程以更新系统信息，时间消耗较大，影响了MTC UE的响应时间，降低了用户的体验。
此外，对于离基站较远，或者位于无线通信链路较差(比如地下室)的深覆盖区域的MTU UE而言，为了接收并读取MIB、SIB1-BR以及除SIB1-BR之外的其他SIB，该MTU UE通常需要做多次重复累积接收才能正确地解调出这些信息，这样，MTU UE获取系统信息消耗的时间更大。
针对上述获取系统信息消耗的时间较大的问题，本申请实施例提供一种系统信息指示方法，通过向通信设备发送包括用于指示系统信息是否发生变化的第一指示信息、以及用于指示MIB是否发生变化或者用于指示MIB中的SIB1-BR的调度信息的第二指示信息的目标信息，使得通信设备能够确定出在系统变化的场景中系统信息变化的细节，也就是说，通信设备能够确定出未发生变化的系统信息，以及发生变化的系统信息。这样，对于未发生变化的系统信息而言，通信设备直接获取存储的该系统信息即可，而无需再与网络设备通信，有效的减少了时间的消耗。
本申请实施例提供的系统信息指示方法适用于通信系统。该通信系统可以是LTE系统，也可以是LTE-A系统，还可以是其他存在系统信息的传输的通信系统，本申请实施例对此不作具体限定。
图2是本申请实施例提供的通信系统的结构示意图。参见图2，该通信系统包括多个通信设备和网络设备21，每个通信设备与网络设备21进行数据传输。图2示出 了6个通信设备，这6个通信设备分别为通信设备1、通信设备2、通信设备3、通信设备4、通信设备5、通信设备6。图2中的通信设备4、通信设备5以及通信设备6还组成一个设备到设备(Device to Device，D2D)通信系统，通信设备4和通信设备6分别通过通信设备5与网络设备21通信。
本申请实施例中的通信设备可以是指能够接收网络设备21发送的调度信息和指示信息的无线终端。无线终端可以是指向用户提供语音和/或数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。例如，该无线终端为MTU UE。
无线终端可以经无线接入网(例如，RAN，英文：Radio Access Network)与一个或多个核心网进行通信。无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，也可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据，例如，手机、平板电脑、笔记本电脑、上网本、个人数字助理(Personal Digital Assistant，PDA)。该无线终端也可以称为终端设备，该终端设备可以执行如图1所示方法。
示例性的，在本申请实施例中，图2所示的通信设备可以为智能手机，下面结合图3对智能手机的各个构成部件进行具体的介绍。
如图3所示，智能手机包括：处理器31，射频(英文：Radio Frequency，RF)电路32、电源33、存储器34、输入单元35、显示单元36、音频电路37等部件。
本领域技术人员可以理解，图3中示出的智能手机的结构并不构成对智能手机的限定，其可以包括比如图3所示的部件更多或更少的部件，或者可以组合如图3所示的部件中的某些部件，或者可以与如图3所示的部件布置不同。
处理器31是智能手机的控制中心，利用各种接口和线路连接整个智能手机的各个部分，通过运行或执行存储在存储器34内的软件程序和/或模块，以及调用存储在存储器34内的数据，执行智能手机的各种功能和处理数据，从而对智能手机进行整体监控。可选的，处理器31可包括一个或多个处理单元。处理器31可集成应用处理器和调制解调处理器。其中，应用处理器主要处理操作系统、用户界面和应用程序等；调制解调处理器主要处理无线通信。可选的，应用处理器和调制解调处理器可以是相互独立设置的，也可以是集成在同一设备的。
RF电路32可用于收发信息或通话过程中，信号的接收和发送，特别地，将基站的下行信息接收后，给处理器31处理；另外，将上行的数据发送给基站。通常，RF电路包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器(Low Noise Amplifier，LNA)、双工器等。此外，RF电路32还可以通过无线通信与网络和其他设备通信。无线通信可以使用任一通信标准或协议，包括但不限于全球移动通讯系统(Global System of Mobile Communication，GSM)、通用分组无线服务(General Packet Radio Service，GPRS)、码分多址(Code Division Multiple Access，CDMA)、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)、LTE、电子邮件、短消息服务(Short Messaging Service，SMS)等。
智能手机包括给各个部件供电的电源33(比如电池)，可选的，电源可以通过电源管理系统与处理器31逻辑相连，从而通过电源管理系统实现管理充电、放电、以及 功耗管理等功能。
存储器34可用于存储软件程序以及模块，处理器31通过运行存储在存储器34的软件程序以及模块，从而执行智能手机的各种功能应用以及数据处理。
存储器34可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如接收目标信息)等；存储数据区可存储根据智能手机的使用所创建的数据(比如音频数据、电话本)等。此外，存储器34可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
输入单元35可用于接收输入的数字或字符信息，以及产生与智能手机的用户设置以及功能控制有关的键信号输入。具体地，输入单元35可包括触摸屏351和其他输入设备352。
触摸屏351，也称为触摸面板，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触摸屏351上或在触摸屏351附近的操作)，并根据预先设定的程式驱动相应的连接装置。可选的，触摸屏351可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器31，并能接收处理器31发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触摸屏351。
显示单元36可用于显示由用户输入的信息或提供给用户的信息以及智能手机的各种菜单。显示单元36可包括显示面板361，可选的，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-emitting Diode，OLED)等形式来配置显示面板361。
进一步的，触摸屏351可覆盖显示面板361，当触摸屏351检测到在其上或附近的触摸操作后，传送给处理器31以确定触摸事件的类型，随后处理器3根据触摸事件的类型在显示面板361上提供相应的视觉输出。虽然，在图3中，触摸屏351与显示面板361是作为两个独立的部件来实现智能手机的输入和输出功能，但是在某些实施例中，可以将触摸屏351与显示面板361集成而实现智能手机的输入和输出功能。
音频电路37、扬声器371和麦克风372，用于提供用户与智能手机之间的音频接口。音频电路37可将接收到的音频数据转换后的电信号，传输到扬声器371，由扬声器371转换为声音信号输出；另一方面，麦克风372将收集的声音信号转换为电信号，由音频电路37接收后转换为音频数据，再将音频数据输出至RF电路32以发送给比如另一智能手机，或者将音频数据输出至存储器34以便进一步处理。
可选的，智能手机还可以包括各种传感器(如陀螺仪传感器、湿度计传感器、红外线传感器或磁力计传感器)、Wi-Fi模块、蓝牙模块、外壳等。图3中并未示出。
本申请实施例中的网络设备21向每个通信设备发送系统信息。该网络设备21是具有中心控制功能的设备，如基站、热点(pico)、传输点(TP)、中继(Relay)、接入点(Access Point，AP)等。
示例性的，在本申请实施例中，图2所示的网络设备21可以为基站，下面结合图 4对基站的各个构成部件进行具体的介绍。
如图4所示，基站包括：基带处理单元(Base Band Unit，BBU)、射频拉远单元(Radio Remote Unit，RRU)和天线，BBU和RRU之间可以用光纤连接，RRU再通过同轴电缆及功分器(耦合器)连接至天线，一般一个BBU可以连接多个RRU。
RRU可以包括4个模块：数字中频模块、收发信机模块、功放模块和滤波模块。数字中频模块用于光传输的调制解调、数字上下变频、数模转换等；收发信机模块完成中频信号到射频信号的变换；再经过功放模块放大以及滤波模块滤波后，将射频信号通过天线发射出去。
BBU用于完成Uu接口(即终端设备与基站之间的接口)的基带处理功能(编码、复用、调制和扩频等)、无线网络控制器(Radio Network Controller，RNC)和基站之间的逻辑接口的接口功能、信令处理、本地和远程操作维护功能，以及基站系统的工作状态监控和告警信息上报功能等。
下面将详细介绍本申请提供的系统信息指示方法。
图5为本申请实施例提供的一种系统信息指示方法的流程示意图，该系统信息指示方法可以应用在图2所示的通信系统中。如图5所示，本申请实施例提供的系统信息指示方法中，S500和S501由图2所示的网络设备21执行，具体可由网络设备21中的处理器执行。另外，S502和S503由图2所示的通信设备执行，具体可由通信设备中的处理器执行。
参见图5，该系统信息指示方法包括如下步骤。
S500、网络设备确定目标信息。
目标信息包括第一指示信息和第二指示信息，第一指示信息用于指示系统信息是否发生变化，第二指示信息用于指示MIB是否发生变化，或者，第二指示信息用于指示MIB中的SIB1-BR的调度信息。结合前面描述可知，本申请中可用schedulingInfoSIB1-BR表示MIB中的SIB1-BR的调度信息。
可选的，第二指示信息也可以用于指示MIB是否发生变化以及MIB中的SIB1-BR的调度信息。
S501、网络设备向通信设备发送目标信息。
S502、通信设备根据第一指示信息和第二指示信息，确定系统信息的变化情况。
结合前面描述可知，系统信息包括MIB和多个SIB。这里，通信设备确定系统信息的变化情况包括通信设备确定MIB是否发生变化以及通信设备确定任一SIB是否发生变化中的至少一个。
S503、通信设备根据系统信息的变化情况，获取存储的系统信息或者重新接收网络设备发送的系统信息。
在通信系统中，网络设备会周期性的向通信设备发送系统信息，且网络设备发送的系统信息也会周期性的发生变化。在发送系统信息之前，网络设备确定目标信息，该目标信息包括第一指示信息和第二指示信息，即网络设备执行S500。
可选的，目标信息为DII，或寻呼消息，或承载有DII的DCI。为了便于描述，本申请实施例以目标信息为承载有DII的DCI为例进行说明。
第一指示信息用于指示系统信息是否发生变化。结合前面描述可知，第一指示信 息可以表示为systemInfoModification或者systemInfoModification-eDRX。第一指示信息的大小为1比特。示例性的，当第一指示信息的数值为“1”时，该第一指示信息指示系统信息发生变化；当第一指示信息的数值为“0”时，该第一指示信息指示系统信息未发生变化。
第二指示信息用于指示MIB是否发生变化。从前面描述可知，承载有DII的DCI包括冗余比特，且不同系统带宽下，承载有DII的DCI包括的冗余比特的数量不同。第二指示信息占用承载有DII的DCI中的冗余比特，这样在现有的承载有DII的DCI的基础上即可实现，适应性较强。
结合前面描述可知，MIB包括SIB1-BR的调度信息、DL-Bandwidth、PHICH-config以及SFN。在通信设备与网络设备的通信过程中，DL-Bandwidth的数值不会发生变化，PHICH-config的数值几乎不会发生变化，即使发生了变化对MTU UE而言也不会有影响，SFN的数值周期性发生变化，但通信设备在与系统同步后可自行确定出SFN的数值。因此，“MIB是否发生变化”相当于“MIB中的SIB1-BR的调度信息是否发生变化”，或者相当于“MIB中除SFN外的其他信息是否发生变化”。也就是说，第二指示信息指示MIB中的SIB1-BR的调度信息是否发生变化，或者，第二指示信息指示MIB中除SFN外的其他信息是否发生变化。在这种情况下，第二指示信息的大小可以为1比特。第二指示信息占用承载有DII的DCI中的一个冗余比特。
此外，MIB还可以包括系统信息变化指示信息。该系统信息变化指示信息指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB在过去的一段时间(示例性的，过去的24小时)内是否发生变化，而不指示MIB中除该系统信息变化指示信息之外的其他信息是否发生变化；或者，该系统信息变化指示信息指示SIB1-BR在过去的一段时间内(示例性的，过去的24小时)是否发生变化，而不指示MIB中除该系统信息变化指示信息之外的其他信息是否发生变化。需要注意的是，其他SIB可以包括SIB1-BR，而且，其他SIB中除SIB1-BR之外的SIB的变化可以引起SIB1-BR的变化。
其中，系统信息变化指示信息是否发生变化可以不影响通信设备判断是否重新接收MIB信息。示例性的，当系统信息变化指示信息为“1”时，指示其他SIB发生变化；当系统信息变化指示信息为“0”时，指示其他SIB未发生变化。若系统信息变化指示信息从“0”变为“1”，则代表其他SIB发生了变化，因此，通信设备需要重新接收SIB1-BR，并且可以根据SIB-BR确定是否接收除了该SIB-BR之外的其他SIB，但并不一定需要重新接收MIB。若系统信息变化指示信息从“1”变为“0”，则代表其他SIB的未变化时间超过了24小时，因此，若通信设备在24小时内更新过其他SIB，则该通信设备不需要重新接收SIB1-BR，也不需要重新接收其他SIB，并且也并不一定需要重新接收MIB。
又例如，当系统信息变化指示信息为“1”时，指示SIB1-BR发生变化；当系统信息变化指示信息为“0”时，指示SIB1-BR未发生变化。若系统信息变化指示信息从“0”变为“1”，则代表SIB1-BR发生了变化，因此，通信设备需要重新接收SIB1-BR，并且可以根据SIB-BR确定是否接收除了该SIB-BR之外的其他SIB，但并不一定需要重新接收MIB。若系统信息变化指示信息从“1”变为“0”，则代表SIB1-BR的未变化时间超过了24小时，因此，若通信设备在24小时内更新过SIB1-BR，则该通信设备不需要重 新接收SIB1-BR，也不需要重新接收其他SIB，并且也并不一定需要重新接收MIB。
可见，该系统信息变化指示信息可以不影响通信设备判断是否需要重新接收MIB信息。因此，“MIB是否发生变化”相当于“MIB中除系统信息变化指示信息之外的其他信息是否发生变化”，或者相当于“MIB中除SFN和系统信息变化指示信息之外的其他信息是否发生变化”。也就是说，第二指示信息可指示除系统信息变化指示信息外的其他信息是否发生变化，也可指示MIB中除SFN和系统信息变化指示信息外的其他信息是否发生变化。在这种情况下，第二指示信息的大小可以为1比特。第二指示信息占用承载有DII的DCI中的一个冗余比特。
可选的，由于SIB1-BR的调度信息包括SIB1-BR的TBS以及SIB1-BR的重复次数，因此，“MIB中的SIB1-BR的调度信息是否发生变化”也可表示为“SIB1-BR的TBS是否发生变化”以及“SIB1-BR的重复次数是否发生变化”。也就是说，第二指示信息可以包括第一标识和第二标识，其中，第一标识指示SIB1-BR的TBS是否发生变化，第二标识指示SIB1-BR的重复次数是否发生变化。在这种情况下，第二指示信息的大小可以为2比特，第一标识和第二标识的大小分别为1比特。同理，第一指示和第二指示均占用承载有DII的DCI中的一个冗余比特。
可选的，由于通信设备每次在获取到系统信息后，会存储其获取到的系统信息，因此，网络设备可向通信设备发送SIB1-BR的调度信息，这样的话，通信设备可根据存储的SIB1-BR的调度信息和重新接收到的SIB1-BR的调度信息确定SIB1-BR的调度信息是否发生变化。也就是说，网络设备向通信设备发送当前的SIB1-BR的调度信息间接的反映了SIB1-BR的调度信息是否发生变化，即反映了MIB是否发生变化。在这种情况下，第二指示信息指示SIB1-BR的调度信息。
SIB1-BR的调度信息包括SIB1-BR的TBS以及SIB1-BR的重复次数。实际应用中，SIB1-BR的TBS有6种，其数值分别为208、256、328、504、712、936，SIB1-BR的重复次数有3种，其数值分别为4、8、16。示例性的，如表3所示，表3示出了SIB1-BR的调度信息的十进制数值与SIB1-BR的TBS、SIB1-BR的重复次数之间的对应关系。表3中，当SIB1-BR的调度信息schedulingInfoSIB1-BR的数值为6时，SIB1-BR的TBS的数值为256，SIB1-BR的重复次数为16。
表3
schedulingInfoSIB1-BR 重复次数 TBS
1 4 208
2 8 208
3 16 208
4 4 256
5 8 256
6 16 256
7 4 328
8 8 328
9 16 328
10 4 504
11 8 504
12 16 504
13 4 712
14 8 712
15 16 712
16 4 936
17 8 936
18 16 936
实际应用中，当系统带宽小于5MHz，也即为系统带宽为1.4MHz或3MHz时，SIB1-BR的重复次数仅为4。当系统带宽大于或等于5MHz，也即系统带宽为5MHz、10MHz、15MHz或20MHz时，SIB1-BR的重复次数可以为4、8或16。
相应的，在第二指示信息指示SIB1-BR的调度信息的情况下，当系统带宽小于5MHz时，第二指示信息具体指示SIB1-BR的传输块大小。
从上面描述可知，当系统带宽为1.4MHz或3MHz时，SIB1-BR的重复次数只能为4，因此，第二指示信息无需再指示SIB1-BR的重复次数。由于实际应用中SIB1-BR的TBS仅有6种，因此，第二指示信息占用承载有DII的DCI的3个冗余比特即可。
示例性的，表4示出了在第二指示信息指示SIB1-BR的调度信息、且系统带宽小于5MHz时，第二指示信息的不同数值(二进制表示)，以及每个第二指示信息的数值对应的SIB1-BR的TBS。结合表4，在第二指示信息指示SIB1-BR的调度信息、且系统带宽小于5MHz的场景中，当第二指示信息的数值为000时，该第二指示信息表示SIB1-BR的TBS为208。
表4
第二指示信息 SIB1-BR的TBS
000 208
001 256
010 328
011 504
100 712
101 936
110 保留
111 保留
表4中，第二指示信息的数值为110和111时，第二指示信息未指示SIB1-BR的TBS。本申请实施例中，当第二指示信息的数值为上述表4中的110和111时，第二指示信息可以指示以下信息中的至少一种：
1、MIB中除了SFN外的其他信息未发生变化，或通信设备使用存储的系统信息。
2、MIB中除了SIB1-BR的调度信息发生变化外，其他信息也发生变化，或通信设备重新接收MIB和/或SIB1-BR。
3、SIB1-BR和/或其他SIB未发生变化。
4、SIB1-BR的调度信息以及其他SIB的调度信息未发生变化，但内容发生了变化。
在第二指示信息指示SIB1-BR的调度信息的情况下，当系统带宽大于或等于5MHz 时，第二指示信息具体用于指示SIB1-BR的传输块大小和重复次数。从前面描述可知，当系统带宽大于或等于5MHz时，承载有DII的DCI中的冗余比特数至少为5。因此，第二指示信息可以占用承载有DII的DCI包括的5个冗余比特。
可选的，在第二指示信息指示SIB1-BR的调度信息的情况下，当系统带宽大于或等于5MHz时，第二指示信息的数值用于指示SIB1-BR的传输块大小和重复次数，如表3所示；或者，第二指示信息包括大小为2比特的第一子信息和大小为3比特的第二子信息，第一子信息用于指示SIB1-BR的重复次数，第二子信息用于指示SIB1-BR的传输块大小。示例性的，表5示出了在第二指示信息指示SIB1-BR的调度信息、且系统带宽大于等于5MHz时，第一子信息的不同数值(二进制表示)以及其对应的SIB1-BR的重复次数。结合表5，在第二指示信息指示SIB1-BR的调度信息，且系统带宽大于或等于5MHz的场景中，第一子信息的数值为10时，该第一子信息表示SIB1-BR的重复次数为8。
表5
第一子信息 SIB1-BR的重复次数
00 4
01 8
10 16
11 保留
示例性的，表6示出了在第二指示信息指示SIB1-BR的调度信息、且系统带宽大于等于5MHz时，第二子信息的不同数值(二进制表示)以及其对应的SIB1-BR的TBS。结合表6，在第二指示信息指示SIB1-BR的调度信息，且系统带宽大于或等于5MHz的场景中，第二子信息的数值为010时，该第二子信息表示SIB1-BR的TBS为328。
表6
第二子信息 SIB1-BR的TBS
000 208
001 256
010 328
011 504
100 712
101 936
110 保留
111 保留
类似的，当第二指示信息的大小为5比特时，对于未用于指示SIB1-BR的重复次数或SIB1-BR的TBS的第二指示信息的数值，可用于指示以下信息中的至少一种：
1、MIB中除了SFN外的其他信息未发生变化，或通信设备使用存储的系统信息。
2、MIB中除了SIB1-BR的调度信息发生变化外，其他信息也发生变化，或通信设备重新接收MIB和/或SIB1-BR。
3、SIB1-BR和/或其他SIB未发生变化。
4、SIB1-BR的调度信息以及其他SIB的调度信息未发生变化，但内容发生了变化。
容易理解的是，由于DII包括的冗余比特数最多为3，承载有DII的DCI包括的冗余比特数最少为3，因此，当第二指示信息的大小小于或等于3比特时，该第二指示信息可以占用DII中的冗余比特，或承载有DII的DCI中的冗余比特。当第二指示信息的大小大于3比特时，该第二指示信息不仅需要占用DII中的冗余比特，还需要占用承载有DII的DCI中除DII外的其他冗余比特。
网络设备在确定出包括第一指示信息和第二指示信息的目标信息后，向通信设备发送该目标信息，即网络设备执行S502。
对应的，在网络设备发送目标信息后，通信设备可接收到该目标信息，这样，通信设备可根据目标信息中的第一指示信息和第二指示信息确定系统信息的变化情况，并根据确定出的系统信息的变化情况，获取存储的系统信息或重新接收网络设备发送的系统信息，即通信设备执行S502和S503。
可选的，若第二指示信息指示MIB中的SIB1-BR的调度信息是否发生变化，则当第一指示信息指示系统信息发生变化、且第二指示信息指示MIB中的SIB1-BR的调度信息未发生变化时，通信设备执行下述流程：获取存储的MIB，然后，根据存储的MIB，重新接收网络设备发送的SIB1-BR，并根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB。
通信设备根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB的方法为：通信设备判断重新接收到的SIB1-BR与存储的SIB1-BR是否相同；若相同，通信设备获取存储的除重新接收到的SIB1-BR之外的其他SIB；若不同，通信设备重新接收网络设备发送的除重新接收到的SIB1-BR之外的其他SIB。
若第二指示信息指示MIB中的SIB1-BR的调度信息是否发生变化，则当第一指示信息指示系统信息发生变化、且第二指示信息指示MIB中的SIB1-BR的调度信息发生变化时，通信设备重新接收MIB。可选的，通信设备重新接收MIB后，可判断重新接收到的MIB与存储的MIB是否相同，并根据判断结果执行后续流程，也可按照现有的获取系统信息的流程，读取MIB中的SIB1-BR的调度信息，并根据读取到的SIB1-BR调度信息获取SIB1-BR，以及根据获取到的SIB1-BR获取其他SIB。
可选的，若第二指示信息用于指示MIB中除SFN外的其他信息是否发生变化，通信设备的处理流程与上述第二指示信息指示MIB中的SIB1-BR的调度信息是否发生变化时通信设备的处理流程相同，此处不再进行详细赘述。
可选的，若第二指示信息包括第一标识和第二标识，第一标识用于指示SIB1-BR的传输块大小是否发生变化，第二标识用于指示SIB1-BR的重复次数是否发生变化，则当第一指示信息指示系统信息发生变化、第一标识用于指示SIB1-BR的传输块大小未发生变化、且第二标识用于指示SIB1-BR的重复次数未发生变化时，通信设备执行下述流程：获取存储的MIB；根据存储的MIB，重新接收网络设备发送的SIB1-BR；根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB。
这里，通信设备根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB的方法可以参考上述描述，此处不再进行详细赘述。
可选的，若第二指示信息包括第一标识和第二标识，第一标识用于指示SIB1-BR的传输块大小是否发生变化，第二标识用于指示SIB1-BR的重复次数是否发生变化， 则当第一指示信息指示系统信息发生变化、第一标识用于指示SIB1-BR的传输块大小未发生变化、且第二标识用于指示SIB1-BR的重复次数发生变化时，通信设备重新接收MIB。通信设备重新接收MIB的方法可以参考上述描述，此处不再进行详细赘述。
可选的，若第二指示信息包括第一标识和第二标识，第一标识用于指示SIB1-BR的传输块大小是否发生变化，第二标识用于指示SIB1-BR的重复次数是否发生变化，则当第一指示信息指示系统信息发生变化、第一标识用于指示SIB1-BR的传输块大小发生变化，且第二标识用于指示SIB1-BR的重复次数未发生变化时，通信设备执行下述流程：同步重新接收网络设备发送的MIB和SIB1-BR，也就是说，通信设备在重新接收网络设备发送的MIB的过程中，也接收网络设备发送的SIB1-BR；根据重新接收到的MIB和重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB。
可选的，若第二指示信息包括第一标识和第二标识，第一标识用于指示SIB1-BR的传输块大小是否发生变化，第二标识用于指示SIB1-BR的重复次数是否发生变化，则当第一指示信息指示系统信息发生变化、第一标识用于指示SIB1-BR的传输块大小发生变化、且第二标识用于指示SIB1-BR的重复次数发生变化时，通信设备重新接收MIB。通信设备重新接收MIB的方法可以参考上述描述，此处不再进行详细赘述。
可选的，若第二指示信息指示MIB中的SIB1-BR的调度信息，通信设备在接收到目标信息后执行下述流程：当第一指示信息指示系统信息发生变化时，根据第二指示信息获取SIB1-BR的调度信息，并根据调度信息获取SIB1-BR。此外，通信设备还可以获取存储的SIB1-BR的调度信息；当存储的SIB1-BR的调度信息与第二指示信息指示的SIB1-BR的调度信息相同时，确定MIB未发生变化；当存储的SIB1-BR的调度信息与第二指示信息指示的SIB1-BR的调度信息不同时，确定MIB发生变化。
此外，本申请实施例中的目标信息除了包括上述第一指示信息和上述第二指示信息外，还可以包括第三指示信息。该第三指示信息用于指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化或者用于指示SIB1-BR是否发生变化。这是因为，除了SIB1-BR、SIB10、SIB12、以及SIB14之外的其他SIB发生变化都会引起SIB1-BR中的systemInfoValueTag和/或systemInfoValueTagSI的变化，因此，指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化，相当于指示SIB1-BR是否发生变化。第三指示信息的大小可以为1比特。这样，通信设备在接收到目标信息后，根据第一指示信息、第二指示信息和第三指示信息，确定系统信息的变化情况。
结合图5，如图6所示，图5中的S502可替换为S502＇。
S502＇、通信设备根据第一指示信息、第二指示信息和第三指示信息，确定系统信息的变化情况。
具体的，当第一指示信息指示系统信息发生变化、第二指示信息用于指示MIB发生变化、且第三指示信息用于指示其他SIB或SIB1-BR未发生变化时，通信设备重新接收网络设备发送的MIB，并获取存储的SIB1-BR。
当第一指示信息指示系统信息发生变化、第二指示信息用于指示MIB未发生变化、且第三指示信息用于指示其他SIB或SIB1-BR发生变化时，通信设备获取存储的MIB，并根据存储的MIB，重新接收网络设备发送的SIB1-BR。然后，该通信设备根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB。这里，通信设备 根据重新接收到的SIB1-BR，获取除重新接收到的SIB1-BR之外的其他SIB的方法可以参考上述描述，此处不再进行详细赘述。
综上所述，通信设备不仅能够根据第一指示信息确定系统信息是否发生变化，还能够根据第二指示信息确定MIB是否发生变化，或者确定SIB1-BR/其他SIB是否发生变化，即确定出未发生变化的系统信息，以及发生变化的系统信息。这样，对于未发生变化的系统信息而言，通信设备直接获取存储的该系统信息即可，而无需再与网络设备通信，有效的减少了时间的消耗。
本申请实施例提供一种网络设备，该网络设备用于执行以上系统信息指示方法中的网络设备所执行的步骤。本申请实施例提供的网络设备可以包括相应步骤所对应的模块。
本申请实施例可以根据上述方法示例对网络设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用对应各个功能划分各个功能模块的情况下，图7示出了上述实施例中所涉及的网络设备的一种可能的结构示意图。如图7所示，网络设备包括确定单元70和发送单元71。
确定单元70用于支持该网络设备执行上述实施例中的S500，和/或用于本文所描述的技术的其它过程；发送单元71用于支持该网络设备执行上述实施例中的S501，和/或用于本文所描述的技术的其它过程。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。当然，本申请实施例提供的网络设备包括但不限于上述模块，例如网络设备还可以包括存储单元72。存储单元72可以用于存储该网络设备的程序代码和数据。
在采用集成的单元的情况下，图8示出了上述实施例中所涉及的网络设备的一种可能的结构示意图。
如图8所示，该网络设备包括：处理模块80和通信模块81。处理模块80用于对该网络设备的动作进行控制管理，例如，处理模块80用于支持该网络设备执行上述方法实施例中的S500，和/或用于本文所描述的技术的其它过程。通信模块81用于支持该网络设备与通信设备通信，例如，通信模块81用于支持该网络设备执行上述方法实施例中的S501。该网络设备还可以包括存储模块82，可以用于存储该网络设备的程序代码和数据。
其中，处理模块80可以是处理器或控制器，例如可以是中央处理器(Central Processing Unit，CPU)，数字信号处理器(Digital Signal Processor，DSP)。其可以实现或执行结合本申请实施例公开内容所描述的各种示例性的逻辑方框，模块和电路。通信模块81可以是通信接口、收发电路或通信接口等。存储模块82可以是存储器。
当处理模块80为处理器，通信模块81为通信接口，存储模块82为存储器时，本申请实施例所涉及的网络设备可以为图9所示的网络设备。
如图9所示，该网络设备包括：通信接口90、处理器91和存储器92。其中，通 信接口90、处理器91与存储器92之间通过系统总线93连接，并完成相互间通信。
当网络设备运行时，该网络设备执行如图5或图6示出的实施例的系统信息指示方法。具体的系统信息指示方法可参见上述如图5或图6所示的实施例中的相关描述，此处不再赘述。
其中，通信接口90用于与其他设备或通信网络通信，如以太网，WLAN等。
其中，存储器92用于存储软件程序以及应用模块，处理器91通过运行存储在存储器92的软件程序以及应用模块，从而执行网络设备的各种功能应用以及数据处理。
存储器92可主要包括存储程序区920，其中，存储程序区920可存储操作系统、至少一个功能所需的应用程序，比如发送目标信息等。
其中，存储器92可以是只读存储器(Read-only Memory，ROM)，或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(Random Access Memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(Electrically Erasable Programmable Read-Only Memory，EEPROM)、磁盘存储介质或者其他磁存储设备、或者能够用于包括或存储具有指令或数据结构形式的期望的程序代码并能够由通信设备存取的任何其他介质，但不限于此。
存储器92可以是独立存在，通过系统总线93与处理器91相连接。存储器92也可以和处理器91集成在一起。
处理器91是网络设备的控制中心。处理器91利用各种接口和线路连接整个网络设备的各个部分，通过运行或执行存储在存储器92内的软件程序和/或应用模块，以及调用存储在存储器92内的数据，执行网络设备的各种功能和处理数据，从而对网络设备进行整体监控。
在具体实现中，作为一种实施例，处理器91可以包括一个或多个CPU，例如图9中的处理器91包括CPU 0和CPU 1。
系统总线93可以分为地址总线、数据总线、控制总线等。本申请实施例中为了清楚说明，在图9中将各种总线都示意为系统总线93。
本申请另一实施例还提供一种计算机可读存储介质，该计算机可读存储介质包括一个或多个程序代码，该一个或多个程序包括指令，当网络设备中的处理器在执行该程序代码时，该网络设备执行如图5或图6所示的系统信息指示方法。
在本申请的另一实施例中，还提供一种计算机程序产品，该计算机程序产品包括计算机执行指令，该计算机执行指令存储在计算机可读存储介质中；网络设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令，至少一个处理器执行该计算机执行指令使得网络设备实施执行图5或图6所示的系统信息指示方法中的网络设备的步骤。
本申请实施例提供一种通信设备，该通信设备用于执行以上系统指示方法中的通信设备所执行的步骤。本申请实施例提供的通信设备可以包括相应步骤所对应的模块。
本申请实施例可以根据上述方法示例对通信设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际 实现时可以有另外的划分方式。
在采用对应各个功能划分各个功能模块的情况下，图10示出了上述实施例中所涉及的通信设备的一种可能的结构示意图。
如图10所示，通信设备包括接收单元100、处理单元101和存储单元102。接收单元100用于支持该通信设备执行上述实施例中的S501，和/或用于本文所描述的技术的其它过程；处理单元101用于支持该通信设备执行上述实施例中的S502、S502＇和/或S503，和/或用于本文所描述的技术的其它过程；存储单元102存储该通信设备的程序代码和数据。其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在采用集成的单元的情况下，本申请实施例中的处理单元101可以是图3中的处理器31，接收单元100可以是图3中的天线，存储单元102可以是存储器34。
当通信设备运行时，该通信设备执行如图5或图6所示的系统信息指示方法。具体的系统信息指示方法可参见上述如图5或图6所示的实施例中的相关描述，此处不再赘述。
本申请另一实施例还提供一种计算机可读存储介质，该计算机可读存储介质包括一个或多个程序代码，该一个或多个程序包括指令，当通信设备中的处理器在执行该程序代码时，该通信设备执行如图5或图6所示的系统信息指示方法。
在本申请的另一实施例中，还提供一种计算机程序产品，该计算机程序产品包括计算机执行指令，该计算机执行指令存储在计算机可读存储介质中；通信设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令，至少一个处理器执行该计算机执行指令使得通信设备实施执行图5或图6所示的系统信息指示方法中的通信设备的步骤。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成 的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：快闪存储器、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (30)

  1. 一种系统信息指示方法，其特征在于，包括：
    确定目标信息，所述目标信息包括第一指示信息和第二指示信息，所述第一指示信息用于指示系统信息是否发生变化，所述第二指示信息用于指示主信息块MIB是否发生变化，或者，所述第二指示信息用于指示所述MIB中的带宽降低系统信息块1SIB1-BR的调度信息；
    向通信设备发送所述目标信息。
  2. 根据权利要求1所述的方法，其特征在于，所述第二指示信息用于指示MIB是否发生变化时，
    所述第二指示信息用于指示所述MIB中的所述SIB1-BR的调度信息是否发生变化；
    或者，
    所述第二指示信息用于指示所述MIB中除系统帧号SFN外的其他信息是否发生变化；
    或者，
    所述第二指示信息用于指示所述MIB中除系统信息变化指示信息外的其他信息是否发生变化；
    或者，
    所述第二指示信息用于指示所述MIB中除SFN和所述系统信息变化指示信息外的其他信息是否发生变化。
  3. 根据权利要求1所述的方法，其特征在于，所述第二指示信息用于指示MIB是否发生变化时，所述第二指示信息包括第一标识和第二标识，所述第一标识指示所述SIB1-BR的传输块大小是否发生变化，所述第二标识指示所述SIB1-BR的重复次数是否发生变化。
  4. 根据权利要求1所述的方法，其特征在于，所述第二指示信息用于指示所述MIB中的SIB1-BR的调度信息时；
    当系统带宽小于5兆赫兹时，所述第二指示信息的大小为3比特，所述第二指示信息用于指示所述SIB1-BR的传输块大小；
    当系统带宽大于或等于5兆赫兹时，所述第二指示信息的大小为5比特，所述第二指示信息用于指示所述SIB1-BR的传输块大小和重复次数，或者，所述第二指示信息包括大小为2比特的第一子信息和大小为3比特的第二子信息，所述第一子信息用于指示所述SIB1-BR的重复次数，所述第二子信息用于指示所述SIB1-BR的传输块大小。
  5. 根据权利要求1-4中任意一项所述的方法，其特征在于，
    所述目标信息还包括第三指示信息，所述第三指示信息用于指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化或者用于指示所述SIB1-BR是否发生变化。
  6. 根据权利要求1-5中任意一项所述的方法，其特征在于，
    直接指示信息DII或寻呼消息包括所述目标信息；
    或者，
    承载了DII的下行控制信息DCI包括所述目标信息。
  7. 一种系统信息指示方法，其特征在于，包括：
    接收网络设备发送的目标信息，所述目标信息包括第一指示信息和第二指示信息，所述第一指示信息用于指示系统信息是否发生变化，所述第二指示信息用于指示主信息块MIB是否发生变化，或者，所述第二指示信息用于指示所述MIB中的带宽降低系统信息块1 SIB1-BR的调度信息；
    根据所述第一指示信息和所述第二指示信息，确定所述系统信息的变化情况；
    根据所述系统信息的变化情况，获取存储的系统信息和/或重新接收所述网络设备发送的系统信息。
  8. 根据权利要求7所述的方法，其特征在于，所述第二指示信息用于指示MIB是否发生变化时，所述第二指示信息用于指示所述MIB中的所述SIB1-BR的调度信息是否发生变化，或者，所述第二指示信息用于指示所述MIB中除系统帧号SFN外的其他信息是否发生变化，或者，所述第二指示信息用于指示所述MIB中除系统信息变化指示信息外的其他信息是否发生变化，或者，所述第二指示信息用于指示所述MIB中除SFN和所述系统信息变化指示信息外的其他信息是否发生变化；
    所述根据所述系统信息的变化情况，获取存储的系统信息和重新接收所述网络设备发送的系统信息，具体包括：
    当所述第一指示信息指示所述系统信息发生变化、且所述第二指示信息指示所述MIB中的所述SIB1-BR的调度信息或者所述MIB中除系统帧号SFN外的其他信息未发生变化时，或者，当所述MIB中除所述系统信息变化指示信息外的其他信息未发生变化时，或者，当所述MIB中除SFN和所述系统信息变化指示信息外的其他信息未发生变化时，获取存储的MIB；根据所述存储的MIB，重新接收所述网络设备发送的SIB1-BR；
    根据重新接收到的SIB1-BR，获取除所述重新接收到的SIB1-BR之外的其他SIB。
  9. 根据权利要求7所述的方法，其特征在于，所述第二指示信息用于指示MIB是否发生变化时，所述第二指示信息包括第一标识和第二标识，所述第一标识用于指示所述SIB1-BR的传输块大小是否发生变化，所述第二标识用于指示所述SIB1-BR的重复次数是否发生变化；
    所述根据所述系统信息的变化情况，获取存储的系统信息和/或重新接收所述网络设备发送的系统信息，具体包括：
    当所述第一指示信息用于指示所述系统信息发生变化、所述第一标识用于指示所述SIB1-BR的传输块大小未发生变化、且所述第二标识用于指示所述SIB1-BR的重复次数未发生变化时，获取存储的MIB；根据所述存储的MIB，重新接收所述网络设备发送的SIB1-BR；根据所述根据重新接收到的SIB1-BR，获取除所述重新接收到的SIB1-BR之外的其他SIB；
    当所述第一指示信息用于指示所述系统信息发生变化、所述第一标识用于指示所述SIB1-BR的传输块大小发生变化，且所述第二标识用于指示所述SIB1-BR的重复次数未发生变化时，同步重新接收所述网络设备发送的MIB和SIB1-BR；根据重新接收到的MIB和重新接收到的SIB1-BR，获取除所述重新接收到的SIB1-BR之外的其他 SIB。
  10. 根据权利要求7所述的方法，其特征在于，所述第二指示信息用于指示所述MIB中的SIB1-BR的调度信息时；
    当系统带宽小于5兆赫兹时，所述第二指示信息的大小为3比特，所述第二指示信息用于指示所述SIB1-BR的传输块大小；
    当系统带宽大于或等于5兆赫兹时，所述第二指示信息的大小为5比特，所述第二指示信息用于指示所述SIB1-BR的传输块大小和重复次数，或者，所述第二指示信息包括大小为2比特的第一子信息和大小为3比特的第二子信息，所述第一子信息用于指示所述SIB1-BR的重复次数，所述第二子信息用于指示所述SIB1-BR的传输块大小；
    所述根据所述第一指示信息和所述第二指示信息，确定所述系统信息的变化情况，具体包括：
    当所述第一指示信息指示所述系统信息发生变化时，根据所述第二指示信息获取SIB1-BR的调度信息，并根据所述调度信息获取SIB1-BR。
  11. 根据权利要求7-10中任意一项所述的方法，其特征在于，所述目标信息还包括第三指示信息，所述第三指示信息用于指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化或者用于指示所述SIB1-BR是否发生变化；
    所述根据所述第一指示信息和所述第二指示信息，确定所述系统信息的变化情况，具体包括:
    根据所述第一指示信息、所述第二指示信息和所述第三指示信息，确定所述系统信息的变化情况；
    所述根据所述系统信息的变化情况，获取存储的系统信息和重新接收所述网络设备发送的系统信息，具体包括：
    当所述第一指示信息指示所述系统信息发生变化、所述第二指示信息用于指示所述MIB发生变化、且所述第三指示信息用于指示所述其他SIB或所述SIB1-BR未发生变化时，重新接收所述网络设备发送的MIB；获取存储的SIB1-BR；
    当所述第一指示信息指示所述系统信息发生变化、所述第二指示信息用于指示所述MIB未发生变化、且所述第三指示信息用于指示所述其他SIB或所述SIB1-BR发生变化时，获取存储的MIB；根据所述存储的MIB，重新接收所述网络设备发送的SIB1-BR；根据所述根据重新接收到的SIB1-BR，获取除所述重新接收到的SIB1-BR之外的其他SIB。
  12. 根据权利要求7-11中任意一项所述的方法，其特征在于，
    直接指示信息DII或寻呼消息包括所述目标信息；
    或者，
    承载了DII的下行控制信息DCI包括所述目标信息。
  13. 一种网络设备，其特征在于，包括：
    确定单元，用于确定目标信息，所述目标信息包括第一指示信息和第二指示信息，所述第一指示信息用于指示系统信息是否发生变化，所述第二指示信息用于指示主信息块MIB是否发生变化，或者，所述第二指示信息用于指示所述MIB中的带宽降低 系统信息块1 SIB1-BR的调度信息；
    发送单元，用于向通信设备发送所述确定单元确定出的所述目标信息。
  14. 根据权利要求13所述的网络设备，其特征在于，所述第二指示信息用于指示MIB是否发生变化时，
    所述第二指示信息用于指示所述MIB中的所述SIB1-BR的调度信息是否发生变化；
    或者，
    所述第二指示信息用于指示所述MIB中除系统帧号SFN外的其他信息是否发生变化；
    或者，
    所述第二指示信息用于指示所述MIB中除系统信息变化指示信息外的其他信息是否发生变化；
    或者，
    所述第二指示信息用于指示所述MIB中除SFN和所述系统信息变化指示信息外的其他信息是否发生变化。
  15. 根据权利要求13所述的网络设备，其特征在于，所述第二指示信息用于指示MIB是否发生变化时，所述第二指示信息包括第一标识和第二标识，所述第一标识指示所述SIB1-BR的传输块大小是否发生变化，所述第二标识指示所述SIB1-BR的重复次数是否发生变化。
  16. 根据权利要求13所述的网络设备，其特征在于，所述第二指示信息用于指示所述MIB中的SIB1-BR的调度信息时；
    当系统带宽小于5兆赫兹时，所述第二指示信息的大小为3比特，所述第二指示信息用于指示所述SIB1-BR的传输块大小；
    当系统带宽大于或等于5兆赫兹时，所述第二指示信息的大小为5比特，所述第二指示信息用于指示所述SIB1-BR的传输块大小和重复次数，或者，所述第二指示信息包括大小为2比特的第一子信息和大小为3比特的第二子信息，所述第一子信息用于指示所述SIB1-BR的重复次数，所述第二子信息用于指示所述SIB1-BR的传输块大小。
  17. 根据权利要求13-16中任意一项所述的网络设备，其特征在于，
    所述目标信息还包括第三指示信息，所述第三指示信息用于指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化或者用于指示所述SIB1-BR是否发生变化。
  18. 根据权利要求13-17中任意一项所述的网络设备，其特征在于，
    直接指示信息DII或寻呼消息包括所述目标信息；
    或者，
    承载了DII的下行控制信息DCI包括所述目标信息。
  19. 一种通信设备，其特征在于，包括：
    接收单元，用于接收网络设备发送的目标信息，所述目标信息包括第一指示信息和第二指示信息，所述第一指示信息用于指示系统信息是否发生变化，所述第二指示信息用于指示主信息块MIB是否发生变化，或者，所述第二指示信息用于指示所述 MIB中的带宽降低系统信息块1 SIB1-BR的调度信息；
    处理单元，用于根据所述接收单元接收到的所述第一指示信息和所述第二指示信息，确定所述系统信息的变化情况；
    所述处理单元，还用于根据确定出的所述系统信息的变化情况，获取所述通信设备中的存储单元存储的系统信息和/或通过所述接收单元重新接收所述网络设备发送的系统信息。
  20. 根据权利要求19所述的通信设备，其特征在于，所述第二指示信息用于指示MIB是否发生变化时，
    所述第二指示信息用于指示所述MIB中的所述SIB1-BR的调度信息是否发生变化；
    或者，
    所述第二指示信息用于指示所述MIB中除系统帧号SFN外的其他信息是否发生变化；
    或者，
    所述第二指示信息用于指示所述MIB中除系统信息变化指示信息外的其他信息是否发生变化；
    或者，
    所述第二指示信息用于指示所述MIB中除SFN和所述系统信息变化指示信息外的其他信息是否发生变化；
    所述处理单元用于获取存储的系统信息和重新接收所述网络设备发送的系统信息，包括：用于当所述第一指示信息指示所述系统信息发生变化、且所述第二指示信息指示所述MIB中的所述SIB1-BR的调度信息或者所述MIB中除系统帧号SFN外的其他信息未发生变化时，或者，当所述MIB中除所述系统信息变化指示信息外的其他信息未发生变化时，或者，当所述MIB中除SFN和所述系统信息变化指示信息外的其他信息未发生变化时，获取所述存储单元存储的MIB；根据所述存储的MIB，通过所述接收单元重新接收所述网络设备发送的SIB1-BR；根据重新接收到的SIB1-BR，通过所述接收单元重新接收除所述重新接收到的SIB1-BR之外的其他一个或多个SIB。
  21. 根据权利要求19所述的通信设备，其特征在于，所述第二指示信息用于指示MIB是否发生变化时，所述第二指示信息包括第一标识和第二标识，所述第一标识用于指示所述SIB1-BR的传输块大小是否发生变化，所述第二标识用于指示所述SIB1-BR的重复次数是否发生变化；
    所述处理单元用于获取存储的系统信息和/或重新接收所述网络设备发送的系统信息，包括：
    当所述第一指示信息用于指示所述系统信息发生变化、所述第一标识用于指示所述SIB1-BR的传输块大小未发生变化、且所述第二标识用于指示所述SIB1-BR的重复次数未发生变化时，获取存储的MIB；根据所述存储的MIB，重新接收所述网络设备发送的SIB1-BR；根据所述根据重新接收到的SIB1-BR，获取除所述重新接收到的SIB1-BR之外的其他SIB；
    当所述第一指示信息用于指示所述系统信息发生变化、所述第一标识用于指示所述SIB1-BR的传输块大小发生变化，且所述第二标识用于指示所述SIB1-BR的重复次 数未发生变化时，同步重新接收所述网络设备发送的MIB和SIB1-BR；根据重新接收到的MIB和重新接收到的SIB1-BR，获取除所述重新接收到的SIB1-BR之外的其他SIB。
  22. 根据权利要求19所述的通信设备，其特征在于，所述第二指示信息用于指示所述MIB中的SIB1-BR的调度信息时；
    当系统带宽小于5兆赫兹时，所述第二指示信息的大小为3比特，所述第二指示信息用于指示所述SIB1-BR的传输块大小；
    当系统带宽大于或等于5兆赫兹时，所述第二指示信息的大小为5比特，所述第二指示信息用于指示所述SIB1-BR的传输块大小和重复次数，或者，所述第二指示信息包括大小为2比特的第一子信息和大小为3比特的第二子信息，所述第一子信息用于指示所述SIB1-BR的重复次数，所述第二子信息用于指示所述SIB1-BR的传输块大小；
    所述处理单元用于根据所述接收单元接收到的所述第一指示信息和所述第二指示信息确定所述系统信息的变化情况，包括：用于当所述第一指示信息指示所述系统信息发生变化时，根据所述第二指示信息获取SIB1-BR的调度信息，并根据所述调度信息获取SIB1-BR。
  23. 根据权利要求19-22中任意一项所述的通信设备，其特征在于，所述目标信息还包括第三指示信息，所述第三指示信息用于指示除SIB10、SIB11、SIB12以及SIB14之外的其他SIB是否发生变化或者用于指示所述SIB1-BR是否发生变化；
    所述处理单元具体用于根据所述第一指示信息、所述第二指示信息和所述第三指示信息，确定所述系统信息的变化情况；
    所述处理单元用于获取存储的系统信息和重新接收所述网络设备发送的系统信息，包括：当所述第一指示信息指示所述系统信息发生变化、所述第二指示信息用于指示所述MIB发生变化、且所述第三指示信息用于指示所述其他SIB或所述SIB1-BR未发生变化时，重新接收所述网络设备发送的MIB；获取存储的SIB1-BR；
    当所述第一指示信息指示所述系统信息发生变化、所述第二指示信息用于指示所述MIB未发生变化、且所述第三指示信息用于指示所述其他SIB或所述SIB1-BR发生变化时，获取存储的MIB；根据所述存储的MIB，重新接收所述网络设备发送的SIB1-BR；根据所述根据重新接收到的SIB1-BR，获取除所述重新接收到的SIB1-BR之外的其他SIB。
  24. 根据权利要求19-23中任意一项所述的通信设备，其特征在于，
    直接指示信息DII或寻呼消息包括所述目标信息；
    或者，
    承载了DII的下行控制信息DCI包括所述目标信息。
  25. 一种网络设备，其特征在于，所述网络设备包括：一个或多个处理器、存储器和通信接口；
    所述存储器、所述通信接口与所述一个或多个处理器连接；所述网络设备通过所述通信接口与其他设备通信，所述存储器用于存储计算机程序代码，所述计算机程序代码包括指令，当所述一个或多个处理器执行所述指令时，所述网络设备执行如权利 要求1-6中任意一项所述的系统信息指示方法。
  26. 一种通信设备，其特征在于，所述通信设备包括：一个或多个处理器、存储器和通信接口；
    所述存储器、所述通信接口与所述一个或多个处理器连接；所述通信设备通过所述通信接口与其他设备通信，所述存储器用于存储计算机程序代码，所述计算机程序代码包括指令，当所述一个或多个处理器执行所述指令时，所述通信设备执行如权利要求7-12中任意一项所述的系统信息指示方法。
  27. 一种计算机存储介质，所述计算机存储介质中存储有计算机程序代码，其特征在于，当所述计算机程序代码在网络设备上运行时，使得所述网络设备执行如权利要求1-6中任意一项所述的系统信息指示方法。
  28. 一种计算机存储介质，所述计算机存储介质中存储有计算机程序代码，其特征在于，当所述计算机程序代码在通信设备上运行时，使得所述通信设备执行如权利要求7-12中任意一项所述的系统信息指示方法。
  29. 一种包含指令的计算机程序产品，其特征在于，当所述计算机程序产品在网络设备上运行时，使得所述网络设备执行如权利要求1-6中任意一项所述的系统信息指示方法。
  30. 一种包含指令的计算机程序产品，其特征在于，当所述计算机程序产品在通信设备上运行时，使得所述通信设备执行如权利要求7-12中任意一项所述的系统信息指示方法。
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