CN112514421B

CN112514421B - System information determination method, device and storage medium

Info

Publication number: CN112514421B
Application number: CN201880092433.0A
Authority: CN
Inventors: 韩金侠; 李振宇; 南杨; 张武荣
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-05-04
Filing date: 2018-05-04
Publication date: 2022-03-11
Anticipated expiration: 2038-05-04
Also published as: CN112514421A; WO2019210507A1

Abstract

A method, a device and a storage medium for determining system information are provided, which enable a communication device to determine the system information of a network device through a first message by sending the first message indicating the system information state to the communication device through the network device. Wherein the types of the first message acquired by the communication device in the RRC connected state and the RRC idle state are different. The method, the device and the storage medium for determining the system information enable the communication equipment not to break RRC connection when the system information is determined, thereby avoiding frequent link release of the terminal in the RRC connection state, reducing communication overhead of releasing and establishing RRC connection between the network equipment and the communication equipment when the system information is determined, and improving system performance.

Description

System information determination method, device and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for determining system information, and a storage medium.

Background

The NarrowBand Internet of Things (NB-IoT) mainly aims at application scenes with far coverage, low cost and low power consumption and works at authorized frequency points. In order to support far coverage, an NB-IoT transmitting end needs to respectively transmit uplink and downlink signals/data for multiple times, and a receiving end performs energy combining on the signals/data to enhance coverage. According to the existing protocol, the system information change period of NB-IoT is large and can be unchanged for 24 hours, therefore, in order to reduce the complexity of the terminal, when the system information of NB-IoT needs to be changed, for the terminal in a Radio Resource Control Connected (RRC _ Connected) state, the eNB firstly releases the RRC connection, so that the terminal in the RRC _ Connected state enters a Radio Resource Control Idle (RRC _ Idle) state; and then the base station sends a system information updating indication message to the terminal in the RRC _ Idle state, and after the terminal in the RRC _ Idle state acquires new system information, the terminal can reestablish RRC connection with the base station to enter the RRC _ Connected state.

A narrow-band Internet of Things (NB-IoT-U) working at an unauthorized frequency point is an Internet of Things communication technology which realizes far coverage, low cost and low power consumption on an unauthorized frequency Spectrum. Since interference on the unlicensed spectrum is unpredictable, in NB-IoT-U, the base station may inform the terminal stations of the available resources on the unlicensed spectrum with system information, i.e.: after determining the available resources on the unlicensed spectrum, the base station sends system information for indicating the available channel resources to the terminal, so that the terminal communicates with the base station according to the available channel resources indicated in the system information after acquiring the system information. On the other hand, since interference on the unlicensed spectrum is varied, in the NB-IoT-U, it is possible that system information may be constantly varied. Therefore, when the channel/frequency point where the interference is located on the unlicensed spectrum changes, the base station needs to send a system information update message to the terminal.

If the method for updating the system information in the NB-IoT is adopted, the base station needs to constantly perform RRC connection release on the terminal in the RRC _ Connected state, and the RRC connection establishment needs to be performed again after the terminal service is interrupted, which results in a large system overhead and an increased service delay.

Disclosure of Invention

The application provides a method, a device and a storage medium for determining system information, wherein a first message indicating a system information state is sent to a communication device through a network device, so that the communication device can determine the system information of the network device through the first message, compared with the communication device in an RRC connection state in the prior art, because the communication device does not support receiving of the message indicating the system information state in the RRC connection state, and the system information can be determined only by disconnecting the RRC connection state.

A first aspect of the present application provides a method for determining system information, including: the communication equipment acquires a first message sent by the network equipment at a first time position; the first message is used for indicating the state of system information acquired by the communication equipment from the network equipment, and the type of the first message acquired by the communication equipment in a Radio Resource Control (RRC) connected state and an RRC idle state is different;

the communication device determines system information acquired from the network device according to the first message.

In an embodiment of the first aspect of the present application, the communication device is in the RRC connected state, the first message acquired by the communication device is broadcast information, the starting position of the first time position is the broadcast information update cycle boundary, and the broadcast information carries available communication resources when the communication device communicates with the network device;

the communication device determines system information acquired from the network device according to the first message, and the method comprises the following steps:

the communication equipment changes first broadcast information into second broadcast information at the first time position according to the first message, and determines system information acquired from the network equipment; the communication device maintains the RRC connection state, the first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource.

In an embodiment of the first aspect of the present application, the determining, by the communication device, system information acquired from the network device according to a change from first broadcast information to second broadcast information in the first time position of the first message, includes:

the communication device starts to receive the second broadcast information repeatedly transmitted by the network device at the boundary of the broadcast information updating period, wherein the broadcast information updating period is T1, the second broadcast information transmitting period is T2, T2 is less than or equal to T1, and T2 is greater than 0; the communication equipment can correctly demodulate after receiving the second broadcast information for N times;

after the broadcast information updating period boundary and before the second broadcast information is received for N times, the communication device continues to use the first communication resource carried by the first broadcast information to perform data transmission with the network device; wherein the data transmission comprises at least reception of a PDSCH and/or transmission of a PUSCH;

after the communication device receives the second broadcast information for N times, if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, if the number of times that the communication device receives and/or sends the first data that is repeatedly sent and/or received by the network device through the first communication resource is less than a preset number of times, the communication device continues to receive and/or send the first data that is sent and/or received by the network device through the second communication resource carried by the second broadcast information;

the first data at least comprises data carried by a PDSCH and/or a PUSCH; the preset number of times is a preset number of repeated sending of the first data.

In an embodiment of the first aspect of the present application, the acquiring, by the communication device, a first message sent by the network device at a first time location includes:

the communication equipment acquires the scheduling information of the broadcast information through a system information block SIB1 of type 1 sent by the network equipment;

the communication device obtains the first information at the first time position through the scheduling information.

In an embodiment of the first aspect of the present application, the first broadcast information and the second broadcast information are the same, and the first communication resource and the second communication resource are the same; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different;

the communication device obtains the same system information update indication in the master information block MIB and the SIB1 sent by the network device before and after the start position of the first time position.

In an embodiment of the first aspect of the present application, the communication device is in the RRC idle state, the first message acquired by the communication device is a system information change instruction, the system information change instruction is used to indicate to the communication device that the system information is changed, and the first time position is a time position where the system information change instruction is acquired;

the communication equipment determines system information change according to the system information change instruction;

the communication device resynchronizes with the network device;

and the communication equipment starts to receive the system information sent by the network equipment at the boundary of the system information updating period.

In summary, in the method for determining system information provided in the first aspect of the present application, the communication device may determine the system information of the network device by obtaining the first message sent by the network device, and compared with the communication device in the RRC connected state in the prior art, because the communication device does not support receiving the message indicating the system information state in the RRC connected state, and the system information may be determined only by disconnecting the RRC connected state, the communication device in this embodiment does not need to disconnect the RRC connection when determining the system information, thereby avoiding frequent link release of the communication device in the RRC connected state, reducing communication overhead between the network device and the communication device when determining the system information, and improving system performance.

A second aspect of the present application provides a system information determining method, including: the method comprises the steps that a network device sends a first message to a communication device at a first time position, so that the communication device determines system information acquired from the network device according to the first message;

the first message is used for indicating a system information state sent by the network equipment to the communication equipment, and the types of the first message sent by the network equipment to the communication equipment in a Radio Resource Control (RRC) connected state and an RRC idle state are different.

In an embodiment of the second aspect of the present application, the first message sent by the network device to the communication device in the RRC connection state is broadcast information, where a starting position of the first time position is a broadcast information update cycle boundary, and the broadcast information carries available communication resources sent by the network device to the communication device;

the network device sending a first message to the communication device at a first time location, comprising:

a first message sent by the network equipment to the communication equipment is changed from first broadcast information to second broadcast information at a first time position; the first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource.

In an embodiment of the second aspect of the present application, after the first message sent by the network device to the communication device is changed from the first broadcast information to the second broadcast information at the first time position, the method further includes:

if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, if the times of the first data repeatedly sent by the network equipment through the first communication resource are less than the preset times, the network equipment continues to send the first data to the communication equipment through the second communication resource carried by the second broadcast information;

the first data is at least data carried by a PDSCH and/or a PUSCH; the preset times are the preset repeated sending times of the first data.

In an embodiment of the second aspect of the present application, the sending, by the network device, a first message to the communication device at a first time location includes:

and the network equipment sends a system information block SIB1 of type 1 carrying the scheduling information of the first message to the communication equipment, so that the communication equipment acquires the first message at a first time position according to the scheduling information.

In an embodiment of the second aspect of the present application, the first broadcast information and the second broadcast information are the same, and the first communication resource and the second communication resource are the same; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different;

the network device sends the same system information update indication in the master information block MIB and the system information block SIB1 sent by the network device before and after the start position of the first time position to the communication device.

In an embodiment of the second aspect of the present application, the first message sent by the network device to the communication device in the RRC idle state is a system information change indication, where the system information change indication is used to indicate to the communication device that the system information is changed, and the first time position is a time position where the system information change indication is sent.

In summary, in the method for determining system information provided in the second aspect of the present application, the network device sends the first message indicating the system information state to the communication device, so that the communication device can determine the system information of the network device through the first message, and compared with the communication device in the RRC connected state in the prior art, which does not support receiving the message indicating the system information state in the RRC connected state, and thus must disconnect the RRC connected state to determine the system information, the communication device in this embodiment does not need to disconnect the RRC connection when determining the system information, thereby avoiding frequent link release of the communication device in the RRC connected state, reducing communication overhead between the network device and the communication device when determining the system information, and improving system performance.

A third aspect of the present application provides a system information determining apparatus, including:

the system comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a first message sent by network equipment at a first time position; the first message is used for indicating the state of system information acquired by the communication equipment from the network equipment, and the type of the first message acquired by the communication equipment in a Radio Resource Control (RRC) connected state and an RRC idle state is different;

a determination module to determine system information obtained from the network device based on the first message.

In an embodiment of the third aspect of the present application, the communication device is in the RRC connected state, the first message acquired by the communication device is broadcast information, the starting position of the first time position is the broadcast information update cycle boundary, and the broadcast information carries available communication resources when the communication device communicates with the network device;

the determining module is specifically configured to determine system information acquired from the network device according to a change from first broadcast information to second broadcast information in the first time position of the first message; the communication device maintains the RRC connection state, the first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource.

In an embodiment of the third aspect of the present application, the determining module is specifically configured to, at the boundary of the broadcast information update period, start receiving the second broadcast information repeatedly transmitted by the network device, where the broadcast information update period is T1, the second broadcast information transmission period is T2, where T2 is less than or equal to T1, and T2 is greater than 0; the communication equipment can correctly demodulate after receiving the second broadcast information for N times;

after the broadcast information updating period boundary and before N times of receiving the second broadcast information, continuing to use the first communication resource carried by the first broadcast information to perform data transmission with the network equipment; wherein the data transmission comprises at least reception of a PDSCH and/or transmission of a PUSCH;

after receiving the second broadcast information for N times, if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, if the number of times that the communication device receives and/or sends the first data that is repeatedly sent and/or received by the network device through the first communication resource is less than a preset number of times, the communication device continues to receive and/or send the first data that is sent and/or received by the network device through the second communication resource carried by the second broadcast information;

In an embodiment of the third aspect of the present application, the obtaining module is specifically configured to obtain, by using a system information block SIB1 of type 1 sent by the network device, scheduling information of the broadcast information;

and acquiring the first information at the first time position through the scheduling information.

In an embodiment of the third aspect of the present application, the first broadcast information and the second broadcast information are the same, and the first communication resource and the second communication resource are the same; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different;

the acquiring module acquires the same system information update indication in the master information block MIB and the SIB1 sent by the network device before and after the start position of the first time position.

In an embodiment of the third aspect of the present application, the communication device is in the RRC idle state, the first message acquired by the communication device is a system information change instruction, the system information change instruction is used to indicate to the communication device that the system information is changed, and the first time position is a time position where the system information change instruction is acquired;

the determining module is specifically configured to determine a system information change according to the system information change instruction;

re-synchronizing with the network device;

and starting to receive the system information sent by the network equipment at the boundary of the system information updating period.

To sum up, the system information determining apparatus provided in the third aspect of the present application can determine the system information of the network device by obtaining the first message sent by the network device, and compared with the communication device in the RRC connected state in the prior art, which does not support receiving the message indicating the system information state in the RRC connected state, and thus the system information must be determined by disconnecting the RRC connected state, the system information determining apparatus in this embodiment does not need to disconnect the RRC connection when determining the system information, thereby avoiding frequent link release of the communication device in the RRC connected state, reducing communication overhead of releasing and establishing the RRC connection when determining the system information between the network device and the communication device, and improving system performance.

A fourth aspect of the present application provides a system information determination device, including: a sending module, configured to send a first message to a communication device at a first time location, so that the communication device determines, according to the first message, system information acquired from the network device; the first message is used for indicating a system information state sent by the network equipment to the communication equipment, and the types of the first message sent by the network equipment to the communication equipment in a Radio Resource Control (RRC) connected state and an RRC idle state are different.

In an embodiment of the fourth aspect of the present application, the first message sent by the sending module to the communication device in the RRC connection state is broadcast information, where a starting position of the first time position is a broadcast information update cycle boundary, and the broadcast information carries available communication resources sent by the network device to the communication device;

the sending module is specifically configured to change a first broadcast message sent to the communication device from first broadcast information to second broadcast information at a first time position; the first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource.

In an embodiment of the fourth aspect of the present application, the method further includes: a processing module, configured to, if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, if the number of times that the network device repeatedly sends the first data through the first communication resource is less than a preset number of times, continue to send the first data to the communication device through the second communication resource carried in the second broadcast information;

In an embodiment of the fourth aspect of the present application, the sending module sends, to the communication device, a system information block SIB1 of type 1 that carries scheduling information of the first message, so that the communication device acquires the first message at a first time position according to the scheduling information.

In an embodiment of the fourth aspect of the present application, the first broadcast information and the second broadcast information are the same, and the first communication resource and the second communication resource are the same; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different;

the sending module sends the same system information update indication in the master information block MIB and the system information block SIB1 sent by the communication device before and after the start position of the first time position.

In an embodiment of the fourth aspect of the present application, the first message sent by the sending module to the communication device in the RRC idle state is a system information change instruction, where the system information change instruction is used to indicate to the communication device that the system information is changed, and the first time position is a time position where the system information change instruction is sent.

To sum up, the system information determining apparatus provided in the fourth aspect of the present application sends the first message indicating the system information state to the communication device, so that the communication device can determine the system information of the network device through the first message, and compared with the communication device in the RRC connected state in the prior art, which does not support receiving the message indicating the system information state in the RRC connected state, and thus must disconnect the RRC connected state to determine the system information, the communication device in this embodiment does not need to disconnect the RRC connection when determining the system information, thereby avoiding frequent link release of the communication device in the RRC connected state, reducing communication overhead of releasing and establishing the RRC connection when determining the system information between the network device and the communication device, and improving system performance.

A fifth aspect of the present application provides a terminal, comprising: the method comprises the following steps: a processor, a memory, and an interface, wherein the memory is to store a computer program; the processor calls the computer program for performing the following operations when the computer program is executed: receiving a first message sent by a network device through an interface at a first time position; the first message is used for indicating the state of system information acquired by the communication equipment from the network equipment, and the types of the first message received by the terminal in a Radio Resource Control (RRC) connected state and an RRC idle state are different; the processor determines system information acquired from the network device according to the first message.

In an embodiment of the fifth aspect of the present application, the terminal is in the RRC connected state, the first message acquired by the communication device is broadcast information, the starting position of the first time position is the broadcast information update cycle boundary, and the broadcast information carries available communication resources when the communication device communicates with the network device;

the processor is specifically configured to determine system information acquired from the network device according to a change of the first message from first broadcast information to second broadcast information at the first time location; the terminal maintains the RRC connection state, the first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource.

In an embodiment of the fifth aspect of the present application, the processor is specifically configured to start receiving the second broadcast information repeatedly transmitted by the network device at the boundary of the broadcast information update period, where the broadcast information update period is T1, the second broadcast information transmission period is T2, where T2 is less than or equal to T1, and T2 is greater than 0; the communication equipment can correctly demodulate after receiving the second broadcast information for N times;

In an embodiment of the fifth aspect of the present application, the system information block SIB1 of type 1 sent by the network device receives scheduling information of the broadcast information through an interface; receiving the first information at the first time location via the scheduling information via an interface.

In an embodiment of the fifth aspect of the present application, the first broadcast information and the second broadcast information are the same, and the first communication resource and the second communication resource are the same; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different;

the system information update indications are the same in the master information block MIB and the SIB1 sent by the network device and acquired through an interface before and after the start position of the first time position.

In an embodiment of the fifth aspect of the present application, the terminal is in the RRC idle state, the first message is a system information change instruction, the system information change instruction is used to indicate to the communication device that the system information is changed, and the first time position is a time position where the system information change instruction is obtained;

the processor is used for determining system information change according to the system information change instruction; re-synchronizing with the network device; and starting to receive the system information sent by the network equipment at the boundary of the system information updating period.

A sixth aspect of the present application provides a base station, comprising: the system comprises a transmitter and a processor, wherein the transmitter is used for transmitting a first message to a communication device at a first time position so that the communication device determines system information acquired from the network device according to the first message; the first message is used for indicating a system information state sent by the network equipment to the communication equipment, and the types of the first message sent by the network equipment to the communication equipment in a Radio Resource Control (RRC) connected state and an RRC idle state are different.

In an embodiment of the sixth aspect of the present application, the first message sent by the sender to the communication device in the RRC connected state is broadcast information, where a starting position of the first time position is a broadcast information update cycle boundary, and the broadcast information carries available communication resources sent by the network device to the communication device;

the transmitter is specifically configured to change a first message sent to the communication device from first broadcast information to second broadcast information at a first time position; the first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource.

In an embodiment of the sixth aspect of the present application, the processor is configured to, if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, if the number of times that the network device repeatedly sends the first data through the first communication resource is less than a preset number of times, the transmitter continuously sends the first data to the communication device through the second communication resource carried in the second broadcast information; the first data is at least data carried by a PDSCH and/or a PUSCH; the preset times are the preset repeated sending times of the first data.

In an embodiment of the sixth aspect of the present application, the transmitter transmits, to the communication device, a system information block SIB1 of type 1 that carries scheduling information of the first message, so that the communication device acquires the first message at a first time position according to the scheduling information.

In an embodiment of the sixth aspect of the present application, the first broadcast information and the second broadcast information are the same, and the first communication resource and the second communication resource are the same; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different;

the transmitter transmits the same system information update indication in the master information block MIB and in the system information block SIB1 transmitted by the communication device before and after the start position of the first time position.

In an embodiment of the sixth aspect of the present application, the first message sent by the sender to the communication device in the RRC idle state is a system information change instruction, the system information change instruction is used to indicate to the communication device that the system information is changed, and the first time position is a time position at which the system information change instruction is sent.

In a seventh aspect, an embodiment of the present application provides a system information determining apparatus, including: a processor and a memory; the memory is used for storing programs; the processor is configured to call a program stored in the memory to execute the system information determination method according to any one of the first aspect of the present application.

In an eighth aspect, an embodiment of the present application provides a system information determining apparatus, including: a processor and a memory; the memory is used for storing programs; the processor is configured to call a program stored in the memory to execute the system information determination method according to any one of the second aspects of the present application.

In a ninth aspect, an embodiment of the present application provides a computer-readable storage medium storing program code, which, when executed, performs the system information determination method according to any one of the first aspect of the present application.

In a tenth aspect, an embodiment of the present application provides a computer-readable storage medium storing program code, which, when executed, performs the system information determination method according to any one of the second aspects of the present application.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system applied in the present application;

FIG. 2 is a possible frame structure of NB-IoT-U;

FIG. 3 is a schematic diagram of a system information update process in NB-IoT;

fig. 4 is a schematic flowchart of an embodiment of a system information determining method according to the present application;

fig. 5 is a schematic flowchart of an embodiment of a system information determining method according to the present application;

fig. 6 is a schematic structural diagram of an embodiment of a communication resource for transmitting broadcast information in the system information determining method of the present application;

fig. 7 is a schematic flowchart illustrating an embodiment of a system information determining method according to the present application;

fig. 8 is a schematic structural diagram of an embodiment of a communication resource for transmitting broadcast information in the system information determining method of the present application;

fig. 9 is a schematic flowchart of an embodiment of a system information determining method according to the present application;

FIG. 10 is a schematic structural diagram of an embodiment of a system information determining apparatus according to the present application;

fig. 11 is a schematic structural diagram of an embodiment of a system information determining apparatus according to the present application;

FIG. 12 is a schematic structural diagram of an embodiment of a terminal of the present application;

fig. 13 is a schematic structural diagram of a base station according to an embodiment of the present application.

Detailed Description

Fig. 1 is a schematic diagram of a communication system according to the present application. The communication system shown in fig. 1 includes: network device 110 and at least one communication device, such as communication device 120 and communication device 130 illustrated in fig. 1. The communication device is connected with the wireless access network device in a wireless mode. The communication device may be fixed or mobile. Fig. 1 is a schematic diagram, and other network devices, such as a wireless relay device and a wireless backhaul device, may also be included in the communication system, which are not shown in fig. 1. The embodiments of the present application do not limit the number of core network devices, radio access network devices, and terminal devices included in the mobile communication system.

The wireless communication system as shown in fig. 1 includes, but is not limited to: narrowband Band-Internet of Things (NB-IoT), Global System for Mobile Communications (GSM), Enhanced Data rates for GSM Evolution (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (Code Division Multiple Access, CDMA2000), Time Division synchronous Code Division Multiple Access (Time Division-synchronous Code Division Multiple Access, TD-SCDMA), Long Term Evolution (Long Term Evolution, LTE), and triple application scenarios llc (Enhanced Mobile broadband Band, eMBB), ursion, and mass Machine communication (mtc-Type) for next generation 5G Mobile communication systems.

The network device may be a device for communicating with the terminal device. For example, the Base Station may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an Evolved Node B (eNB or eNodeB) in an LTE system, or a network side device in a future 5G network. Or the network device may also be a relay station, an access point, a vehicle-mounted device, etc. In an end-to-end (D2D) communication system, the network Device may also be a terminal that functions as a base station. A terminal may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem with wireless communication capabilities, as well as various forms of User Equipment (UE), Mobile Station (MS), and the like. The embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices. The network equipment and the terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons, and satellites. The embodiment of the application does not limit the application scenarios of the network device and the terminal device.

The communication device may also be referred to as a Terminal, User Equipment (UE), Mobile Station (MS), Mobile Terminal (MT), etc. The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in home (smart home), and the like.

The embodiments of the present application may be used for downlink signal transmission, may also be used for uplink signal transmission, and may also be applicable to device-to-device (D2D) signal transmission. For downlink signal transmission, the transmitting device is a network device and the corresponding receiving device is a communication device. For uplink signal transmission, the transmitting device is a communication device and the corresponding receiving device is a network device. For D2D signaling, the sending device is a communication device and the corresponding receiving device is also a communication device. The embodiment of the present application does not limit the transmission direction of the signal. The communication between the network device and the communication device and between the communication device and the communication device may be performed through a licensed spectrum (licensed spectrum), may be performed through an unlicensed spectrum (unlicensed spectrum), or may be performed through both the licensed spectrum and the unlicensed spectrum. The network device and the communication device may communicate with each other through a 6G or less frequency spectrum, may communicate through a 6G or more frequency spectrum, and may communicate through both a 6G or less frequency spectrum and a 6G or more frequency spectrum. The embodiments of the present application do not limit the spectrum resources used between the network device and the communication device.

Further, the communication system shown in FIG. 1 may be a NarrowBand Internet of Things (NB-IoT-U) operating in Unlicensed frequency bands. The NB-IoT-U is an Internet of Things communication technology which works on an unlicensed spectrum and realizes far coverage, low cost and low power consumption, and the technical characteristics of the technology are mainly based on a narrow-band Internet of Things (NB-IoT). The main working frequency point of the terminal in the NB-IoT-U is an unauthorized frequency point of sub1GHz (frequency point lower than 1 GHz), and can also be expanded to other unauthorized frequency spectrums such as 2.4 GHz. Different working frequency points correspond to different frequency spectrum laws and regulations. Since there may be deployments of other wireless communication systems on the unlicensed spectrum, the NB-IoT-U mainly adopts a frequency hopping technique to avoid interference of frequency points deployed by other communication systems on the unlicensed spectrum.

For example: in the regions such as the United states and the like which comply with the FCC regulations, the operating bandwidth of the unlicensed spectrum at sub1GHz is 902-928MHz, and if the channel bandwidth of the NB-IoT-U is 210KHz, the bandwidth range of 902-928MHz can be divided into 123 NB-IoT-U channels. If the NB-IoT-U downlink is configured as a single carrier, i.e., the downlink is transmitted on only 1 210KHz channel at the same time, the base station may transmit 123-bit information through broadcast information to indicate the available status of each channel, and likewise, if the NB-IoT-U downlink is configured as three carriers, i.e., the downlink is transmitted on 3 210KHz channels at the same time, the base station may transmit 41-bit information through broadcast information to indicate the available status of each channel group.

Fig. 2 is a possible frame structure of NB-IoT-U, and as shown in fig. 2, DL refers to downlink subframes and UL refers to uplink subframes. A Black list means that the channel is not available. PSS refers to the primary synchronization channel, SSS to the secondary synchronization channel, PBCH to the physical broadcast channel, SIB to the system information block, and both PBCH and SIB are broadcast information. Wherein, the channel for transmitting the PSS/SSS/PBCH/SIB is an anchor channel. Since the downlink resource on the anchor channel is always transmitted, in the above example, if the NB-IoT-U operating bandwidth is 210KHz, the rest 120 NB-IoT-U data channels are left in the bandwidth range of 902-. If the NB-IoT-U downlink is configured as a single carrier, the base station may transmit 120-bit information through broadcast information to indicate the availability status of each channel, and likewise, if the NB-IoT-U downlink is configured as three carriers, i.e., downlink data channels are simultaneously transmitted on 3 210KHz, the base station may transmit 40-bit information through broadcast information to indicate the availability status of each channel group.

Meanwhile, when NB-IoT-U is implemented based on NB-IoT, a paging message and a paging cycle (Discontinuous Reception (DRX) cycle) of a terminal are defined in the 3rd Generation Partnership Project (36 PP), a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Shared Channel (PDSCH) corresponding to the paging message are scrambled by P-RNTI and indicate system information update through information bits carried in the PDSCH Channel, when the paging message is used only to indicate system information change, only the P-scrambled PDCCH may be included and indicate system information update through information bits carried in the PDCCH Channel, that is, direct indication message, the base station determines a paging message transmission time of each terminal according to parameters such as the paging cycle of each terminal, a terminal identifier, and the like, when the system information needs to be updated, the base station informs the terminal through the PDCCH scrambled by the P-RNTI or the PDCCH and the PDSCH scrambled by the P-RNTI at the paging moment, and then updates the system information at the boundary of the next system information updating period. Correspondingly, the terminal determines the paging message receiving time of the terminal according to the parameters such as the paging cycle, the terminal identification and the like, and if the base station is detected to send a system information updating indication at the paging time, the updated system information is received at the next system information updating cycle boundary. The relationship between the system information updating period and the paging period is as follows: the system information updating period is the updating period coefficient, the paging period, and the updating period coefficient takes values of 2, 4, 8, 16, and the like.

Fig. 3 is a schematic diagram of a system information update process in NB-IoT. As shown in fig. 3, in an update period n, the base station notifies the terminal that the first system information is about to change; in the update period n +1, the first system information is changed to the second system information; in the update periods n and n +1, the third system information is not changed. When the system information needs to be updated, the base station notifies the terminal that the system information is about to be changed in a paging cycle corresponding to the current updating cycle of each terminal. Then, the base station changes the system information in the next system information update period. Correspondingly, if the terminal detects that the base station sends the system information updating indication in the paging cycle, the terminal receives the updated system information in the next system information updating cycle. In the NB-IoT system, all terminals that receive system information at the system information update cycle boundary are terminals in the RRC _ Idle state.

In summary, since the NB-IoT-U frequency hopping system needs to frequently adjust the frequency point used when the terminal communicates with the base station at the unauthorized frequency point, that is, the frequency hopping format may change frequently, in order to ensure normal communication between the base station and the terminal, when the frequency hopping format at the base station side changes, the base station needs to notify the terminal through broadcast information. That is, after determining the available resources on the unlicensed spectrum, the base station sends system information indicating the available channel resources to the communication device, so that the communication device communicates with the base station according to the available channel resources indicated in the system information after acquiring the system information. Meanwhile, when the frequency point of the interference on the unlicensed spectrum changes, the base station sends a system information update message to the communication equipment to indicate the communication equipment to acquire new system information and to re-determine the information of the available channel resources. In the prior art, in an NB-IoT system, a scheme for determining system information is as follows: when a terminal in a Radio Resource Control (RRC) Connected state (RRC _ Connected) updates system information, in order for the terminal to determine the system information, a base station first instructs the terminal to perform RRC connection release and to enter a Radio Resource Control (RRC) Idle state (RRC _ Idle). Since the system information changes infrequently, connection release is performed once at a time for all terminals in the RRC _ Connected state, and the impact on the system overhead is not great. And for the terminals in the RRC _ Idle state, the base station sends the PDCCH scrambled by the P-RNTI to different terminals in a system information updating period n according to the sending time of the paging message of different terminals, indicates the updating of the system information, and then updates the system information in a system information updating period n + 1. Correspondingly, the terminal detects the PDCCH scrambled by the P-RNTI according to the paging cycle and the paging sending time, detects whether the system information updating indication exists or not, and determines the system information at the moment.

Because the interference source of the unauthorized frequency point is not controllable, the frequency point where the interference is located may change frequently, the base station side may need to send broadcast information frequently to inform the channel state of the terminal, and if the prior art is adopted, the terminal in the RRC _ Connected state needs to perform RRC connection release first every time the system message is updated, so that the terminal is in the RRC _ Idle state and determines new system information. Subsequently, since the system information update releases the RRC connection for the terminal in the RRC _ Connected state, which may interrupt data transmission of the terminal in the RRC _ Connected state, when the system information update is completed, part of the terminals in the RRC _ Idle state also need to re-access the cell, and the process of re-accessing the cell also consumes system resources, thereby greatly affecting system performance. That is, since the frequency point interference source on the unlicensed spectrum used in the NB-IoT-U system is not controllable, the system information used for indicating available resources may change frequently, and if the system information update procedure adopted in the existing NB-IoT is adopted, the communication overhead of frequently releasing and establishing the RRC connection between the terminal and the base station when determining the system information in the NB-IoT-U system is large.

Therefore, in summary, the present application provides a method, an apparatus, and a storage medium for determining system information, so as to reduce communication overhead between a communication device and a network device when determining system information.

Fig. 4 is a flowchart illustrating an embodiment of a system information determining method according to the present application. As shown in fig. 4, the system information determining method of the present embodiment includes: the network device sends a first message to the communication device, and the communication device receives the first message, so that the communication device determines the system information acquired from the network device according to the first message. The first message is used for indicating the state of system information acquired by the communication equipment from the network equipment; and the type and purpose of the first message sent by the network device to the communication device in the RRC connected state and the RRC idle state are different.

Specifically, the network device determines the system information according to the first message through the first message sent to the communication device. When the communication device is in the RRC connected state, the first message sent by the network device to the communication device may be the system information, so that the communication device directly acquires the system information without disconnecting the RRC connection. When the communication device is in the RRC idle state, the first message sent by the network device to the communication device may be a system information update instruction, so that the communication device establishes an RRC connection with the network device according to the system information update instruction and obtains system information, and then communicates with the network device according to the system information.

In summary, in the method for determining system information provided in this embodiment, the network device sends the first message indicating the system information state to the communication device, so that the communication device can determine the system information of the network device through the first message, and compared with the communication device in the RRC connection state in the prior art, which needs to disconnect the RRC connection state to acquire the system information, when the system information is determined, the communication device in this embodiment does not need to disconnect the RRC connection, and directly determines the system information through the first message sent to the communication device by the network device, thereby avoiding frequent link release of the communication device in the RRC connection state, reducing communication overhead between the network device and the communication device for releasing and establishing the RRC connection when determining the system information, and improving system performance.

Fig. 5 is a flowchart illustrating an embodiment of a system information determining method according to the present application. As shown in fig. 5, for the communication device in the RRC _ Connected state, when the system information needs to be updated from the first broadcast message to the second broadcast message, the first message sent by the network device to the communication device is the second broadcast message sent by the network device to the communication device, the starting position of the first time position of the first message sent by the network device to the communication device is a broadcast information update cycle boundary, and the broadcast information carries available communication resources when the communication device and the network device communicate. The broadcast information update period boundary in this embodiment may be a system information update period boundary in the NB-IoT-U. The communication device receives the second broadcast information at the first time location and determines system information when communicating with the network device. Specifically, during the process that the communication device receives the second broadcast information according to the transmission cycle of the second broadcast information, that is, during the process that the communication device receives the second communication resource, the communication device still maintains the RRC connection state with the network device. The first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource.

In particular, the system information determination method provided by the application can be applied to NB-IoT-U systems. Since the NB-IoT-U system is designed based on the NB-IoT system, the broadcast information of the existing NB-IoT system has been classified according to different update periods and different broadcast information contents, such as MIB, SIB1, SIB2, etc. Therefore, the present application can add a new broadcast message, which can be named as SIB-U, to send the channel list field. Wherein the channel list field is used for the network device in the NB-IoT-U to indicate the availability status of each channel/channel group to the communication device. Optionally, when the first message is broadcast information SIB-U, the SIB-U is sent on an anchor channel within a communication frame between the network device and the communication device.

Optionally, in the above embodiment, the acquiring, by the communication device, the first message sent by the network device at the first time location includes: the communication equipment acquires the scheduling information of the broadcast information through a system information block SIB1 of type 1 sent by the network equipment; the communication device obtains the first message at the first time location via the scheduling information. That is, SIB-U is scheduled by SIB1, i.e., the transmission period and/or transport block size of SIB-U is indicated by SIB 1.

Optionally, in the above embodiment, in addition to adding a new broadcast information for indicating the system information, a channel list field for indicating the system information may be carried in the existing broadcast information, such as MIB, SIB1, SIB 2. The specific implementation manner and principle are the same as those of SIB-U, and are not described again.

For example: fig. 6 is a schematic structural diagram of an embodiment of a communication resource for sending broadcast information in the system information determining method according to the present application. In fig. 6, the broadcast information is exemplified as SIB-U. As shown in fig. 6, the network device periodically transmits broadcast information SIB-U to the communication device, and updates the transmitted SIB-U only when a broadcast information update period boundary is reached. If the SIB-U content is not changed, when the update boundary is reached, the second broadcast information sent by the network equipment is the same as the first broadcast information; if the content of the SIB-U needs to be changed and the update period boundary is not reached, the base station needs to continue to send the original SIB-U message, i.e. the base station needs to continue to send the first broadcast information, and only when the update period of the SIB-U is reached, the base station can send the updated SIB-U, i.e. the base station needs to send the second broadcast information, which is different from the first broadcast information.

Specifically, as shown in fig. 6, the system information update period is T1, the transmission period of the SIB-U is T2, where T2 is equal to or less than T1, and T2 is greater than 0. And in the period boundary (c) of the system information updating period, the network equipment periodically sends a first SIB-U to the communication equipment, and after the network equipment still keeps sending the first SIB-U to the period boundary (c) of the system information updating period, the network equipment sends a second SIB-U in the system information updating period after the period boundary (c) of the system information updating period, assuming that the system information is updated at a certain time between the period boundary (c) of the system information updating period and the period boundary (c). Similarly, if the system information is updated at a certain time between the system information updating period boundaries (c) to (c), the network device still keeps sending the second SIB-U to the system information updating period boundary (c), and then sends the third SIB-U at the system information updating period boundary (c) after the system information updating period boundary (c). Wherein, for each system information updating period comprising a plurality of SIB-U transmission periods, the time unit in each SIB-U transmission period may be used for uplink data transmission or downlink data transmission, such as the time unit available for downlink data transmission, the time unit available for uplink data transmission shown in the figure. Moreover, when the communication device reaches the system information update boundary of the SIB-U, the communication device in the RRC _ Connected state needs to read the SIB-U message by default regardless of whether the SIB-U system information is changed.

Further, in the above-described embodiment, the network device periodically transmits broadcast information indicating the communication resource to the communication device, and periodically transmits the broadcast information to the communication device even if the communication resource is not changed. That is, the first broadcast information and the second broadcast information in the above embodiment are the same, and the first communication resource is the same as the second communication resource; alternatively, the first broadcast information and the second broadcast information are different, and the first communication resource is different from the second communication resource.

Optionally, in a case that the first broadcast information and the second broadcast information are the same or different, the communication device obtains the same system information update indication in the master information blocks MIB and SIB1 sent by the network device before the start position of the first time position, i.e., the broadcast information update cycle boundary, and after the start position of the first time, i.e., the broadcast information update cycle boundary. Specifically, i.e., in the above example, the update of SIB-U does not affect the MIB and the ValueTag count in SIB 1. The system information value tag field in the MIB message is used for indicating system information update, the field takes values of 0-31, if the field takes values different from values of the communication device when reading the MIB last time, the communication device needs to continue reading SIB1 broadcast information, the SIB1 includes scheduling information and change indication information of multiple SIs, that is, each SI scheduled by the SIB1 corresponds to a systemlnfaluetag field, the field takes values of 0-3, and if the systemlnfalluetagsi field corresponding to a certain SI and the systemlnfaluetagsi field corresponding to the SI when reading the SIB1 last time, the communication device needs to continue reading the SI information. Then, for the new addition of SIB-U system information to the NB-IoT-U in the above embodiment, when the SIB-U is updated, the values of the corresponding systemlnfovaluetag in the MIB and the corresponding systemlnfovaetagsi field in SIB1 do not change, so that the SIB-U does not need to re-read the broadcast information of SIB1 and other SIs before or after the update boundary, and the frequent reading of broadcast information by the communication device is reduced.

In particular, in the above embodiment, since the broadcast information SIB-U indicating the available resource is transmitted on the anchor channel, the communication device can update the system information without disconnecting the RRC connection when the system information is changed, and thus, compared with the prior art in which the RRC connection needs to be disconnected every time the system information is updated, the communication overhead between the communication device and the network device during system information update can be effectively reduced.

For example: fig. 7 is a flowchart illustrating an embodiment of a system information determining method according to the present application. The embodiment shown in fig. 7 is a specific implementation manner based on the embodiment shown in fig. 5. The network device sends first broadcast information carrying first communication resources to the communication device in the RRC connection state, so that the communication device and the network device communicate through the first communication resources. The first broadcast information may here be a first SIB-U carrying channel information that the first communication resource is available, i.e. which channels are used for NB-IoT-U system frequency hopping usage. The communication device in the RRC connection state maintains the RRC connection state with the network device, starts to acquire second broadcast information carrying second communication resources at a system information update boundary, and communicates with the network device through the second communication resources after acquiring the second broadcast information. The second broadcast information may here be a second SIB-U, carrying second communication resources that are available channel information. Therefore, the communication equipment which originally communicates with the network equipment through the first communication resource can keep the RRC connection state with the network equipment without disconnecting the RRC connection in the whole process that the network equipment indicates that the system information is changed from the first communication resource to the second communication resource through the second broadcast information and communicates with the network equipment through the changed second communication resource.

In summary, for the communication device in the RRC-Connected state, the method for determining system information according to this embodiment does not need to disconnect the RRC connection when determining the system information, so as to avoid frequent link release of the communication device in the RRC Connected state, reduce communication overhead of releasing and establishing the RRC connection between the network device and the communication device when determining the system information, and improve system performance. Meanwhile, the system information in this embodiment may be a channel list field indicating an available state of each channel/channel group, and the field may indicate which frequency points of the communication device may be used and which frequency points with severe interference may not be used, so that non-orthogonal interference between narrowband systems may be reduced. And by newly adding an SIB-U on the anchor channel for sending the channel list information, the SIB-U update needs to satisfy the periodic condition, and the change does not affect the count of the system information update flag in the MIB and the SIB 1. Meanwhile, when the system information is updated, the SIB-U does not need to notify the communication device in the RRC _ Connected state or release the communication device, so that frequent RRC connection and release between the communication device and the network device are effectively reduced, communication overhead between the communication device and the network device during the system information update is reduced, the communication device in the RRC _ Connected state starts to receive the system information when reaching a boundary of a system information update period, whether the system information is changed or not does not need to be judged, and the processing complexity of the communication device is reduced.

Further, for the communication device in the RRC-Connected state, there are two application scenarios: one is a communication device in RRC _ Connected state and performing data transmission, wherein the data transmission is transmitted through a PDSCH or PUSCH physical channel, and the other is a communication device in RRC _ Connected state but without data transmission.

When the communication device in the RRC _ Connected state and performing data transmission and the network device performing data transmission reach the broadcast information update cycle boundary, the communication device and the network device need to be designed uniformly to continue to transmit/receive data that is not transmitted before the broadcast information update cycle boundary or stop transmitting/receiving data that is not transmitted before the broadcast information update cycle boundary.

In the scheme, for the communication equipment, the boundary of the system information updating period is reached, and the data which is not transmitted before the boundary of the broadcast information updating period is continuously received/sent; for the network equipment, when the system information updating period boundary is reached, if the second communication resource indicated by the second broadcast information is different from the first communication resource indicated by the first broadcast information, the network equipment stops sending/receiving data which is not transmitted before the broadcasting information updating period boundary; for the network device, when the system information updating period boundary is reached, if the second communication resource indicated by the second broadcast information is the same as the first communication resource indicated by the first broadcast information, the network device continues to transmit/receive data that has not been transmitted before the broadcast information updating period boundary. The transmitted data refers to data transmitted through a PDSCH or PUSCH physical channel, and does not include broadcast information transmitted through the PDSCH physical channel.

When data transmission is performed through the PDSCH and/or PUSCH physical channels, scheduling information of the data transmission is determined by the PDCCH physical channel. And when the network device can judge that the system information updating boundary of the system information updating period n and the system information updating period n +1 is reached in the system information updating period n, the content of the second communication resource indicated by the second broadcast information is the same as or different from the content of the first communication resource indicated by the first broadcast information, if the content of the second communication resource indicated by the second broadcast information is the same as the content of the first communication resource indicated by the first broadcast information, the network device can continue to send/receive data which is not transmitted before the broadcast information updating period boundary, and resource waste caused by PDCCH transmission and partial PDSCH or PUSCH transmission is avoided. For the communication device, before correctly receiving the second system information, it is not determined that the second communication resource indicated by the second broadcast information is the same as or different from the first communication resource indicated by the first broadcast information, so that the network device can continue to receive and/or transmit data as transmitted on the PDSCH and/or PUSCH channels while receiving the second broadcast information, and resource waste caused by PDCCH transmission and partial PDSCH or PUSCH transmission is avoided as much as possible. The details will be described below.

Because the NB-IoT-U system has a requirement for deep coverage and needs to design the system according to an application scenario of deep coverage, physical channels such as a downlink PBCH, a PDCCH, and a PDSCH, and physical channels such as an uplink PUSCH in the NB-IoT-U system all need to be covered and enhanced. Meanwhile, the available communication resources (i.e. the aforementioned channel list) of the network device and the communication device may be sent through the PBCH channel, i.e. through the MIB; it may also be transmitted through the PDSCH channel, i.e., through SIBs. In the following, a manner in which the communication device and the network device continue to transmit data when the channel list information reaches the broadcast information update period boundary is described by taking an example in which the channel list information is transmitted through the PDSCH channel, that is, through the SIB. In this embodiment, coverage enhancement takes the usual way of repeatedly transmitting over time. For example, in the resource structure diagram shown in fig. 6, in the system information updating period between two updating boundaries (i) and (ii), the network device transmits SIB-U at a preset SIB-U transmission period, so that the communication device, for example, starts at the system information updating period boundary (i), confirms the first SIB-U after repeatedly receiving the first SIB-U N times continuously at the first time position, and communicates with the network device according to the communication resource indicated by the first SIB-U.

Therefore, for the communication device and the network device in the RRC _ Connected state and performing data transmission, if the system information is changed from the first broadcast information SIB-U to the second broadcast information SIB-U at the system information update period boundary, the available communication resources are changed from the first communication resources indicated by the first broadcast information to the second communication resources indicated by the second broadcast information SIB-U. Fig. 8 is a schematic structural diagram of an embodiment of a communication resource for sending broadcast information in the system information determining method according to the present application. If the system information has not changed, that is, the first broadcast information is the same as the second broadcast information, and the first communication resource is the same as the second communication resource, as shown in fig. 8

1. Before a broadcast information update period boundary t1, the network device periodically transmits a first SIB-U to the communication device; the communication equipment receives a first SIB-U sent by the network equipment; the network device and the communication device receive/transmit the first data according to the first communication resource indicated by the first SIB-U.

2. After the starting position of the first time position, i.e. the broadcast information update period boundary t1 shown in the figure, the network device periodically transmits a second SIB-U to the communication device; the communication equipment starts to receive second broadcast information sent by the network equipment, and the scheme assumes that the communication equipment can correctly demodulate the second broadcast information after repeatedly receiving the second broadcast information sent by the network equipment for N times; after the broadcast information update period boundary t1 and before the second broadcast information is received N times (i.e. the time period from t1 to t2 shown in the figure, that is, the aforementioned first time position), the communication device still continues to use the first communication resource carried by the first broadcast information to perform data transmission with the network device; wherein the data transmission at least comprises the reception of the PDSCH and/or the transmission of the PUSCH; for example, taking N to 3 as an example, it is determined that the system message is changed from the first SIB-U to the second SIB-U after the network device receives the second SIB-U repeatedly transmitted by the network device three times at time t 2. And between t1 to t2 where the second SIB-U has not been received three times, the communication device and the network device still receive/transmit the first data through the first communication resource. For the network device, it needs to determine that the first communication resource carried by the first SIB-U is the same as or different from the second communication resource carried by the second SIB-U. If the network equipment judges that the first communication resource carried by the first SIB-U is the same as the second communication resource carried by the second SIB-U, the network equipment can continue to transmit the data of the communication equipment which is not transmitted before the boundary of the broadcast information updating period; and if the network equipment judges that the first communication resource carried by the first SIB-U is different from the second communication resource carried by the second SIB-U, stopping transmitting the data of the communication equipment which is not transmitted before the broadcast information updating period boundary.

3. After the time when the first time position at which the communication device receives the second broadcast information N times ends, that is, after the time t2 shown in the figure, if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, and if the number of times that the communication device receives the first data repeatedly sent by the network device through the first communication resource is less than the preset number of times, the communication device continues to receive the first data sent by the network device through the second communication resource carried by the second broadcast information after t2, or the network device continues to receive the first data sent by the communication device. The first data at least comprises data carried by a PDSCH and/or a PUSCH; the preset number of times is a preset number of repeated transmission of the first data.

For example: the network device configures to repeat the sending of the first data to the communication device 10 times in a manner of enhancing coverage before the system information update period boundary t1, that is, sending the first data through the first communication resource as shown in fig. 8. And when the system information update period boundary t1 is reached, the network device repeatedly transmits the first data only 5 times through the first communication resource. Since the network device may determine that the second communication resource is the same as or different from the first communication resource in the system information update period before the system information update period boundary t1, if the second communication resource is the same as or different from the first communication resource, the network device may still repeat the transmission of the first data to the communication device 5 times through the second or first communication resource after t 1. For the communication device, it is not determined whether the system information is updated until the second SIB-U is repeatedly received 3 times, and the communication device still receives the first data through the first communication resource between t1 and t 2. The communication device determines at time t2 that the first SIB-U is changed to the second SIB-U, and the first SIB-U and the second SIB-U are the same and are not changed, and the communication device completes 10 receptions of the first data after continuing to receive the first data transmitted by the network device 2 times through the second communication resource after t 2. Since the first SIB-U is the same as the second SIB-U and the first communication resource is also the same as the second communication resource, the network device receiving the first data sent by the network device through the second communication resource may be understood as the network device continuing to receive data through the resource before the system information update boundary.

In summary, in all the time before t1 and after t1 of the embodiment, the RRC connection does not need to be disconnected due to the system information update boundary being reached, if the first data received before t1 does not reach the preset number of times of enhanced coverage transmission, the first data continues to be transmitted after t1, and since the system information does not change, the first communication resource and the second communication resource are the same, the communication device can continue to receive the first data through the second communication resource. Therefore, for the communication device which is in the RRC _ Connected state and has started transmission before the boundary of the system information update period, since the communication resources before and after are the same, it is possible to continue transmission of data that has not been transmitted after the system information update period, thereby avoiding waste of resources.

More specifically, in the above embodiment, the data transmitted by the network device and the communication device are the PDSCH and the PDCCH. The PDCCH transmits control information and the PDSCH transmits data information. The PDCCH contains scheduling information of the PDSCH, and the communication equipment can correctly demodulate the PDSCH channel only when demodulating the content of the PDCCH channel. Since the communication device cannot know whether the network device has a PDCCH for the communication device to transmit, the communication device in the RRC _ Connected state needs to perform blind detection on the PDCCH, that is, blind detection is performed according to different PDCCH formats and different repetition times. And because the NB-IoT-U system has the requirement of low power consumption, a period is set for the transmission of the PDCCH, and the communication equipment can perform blind detection according to the transmission period of the PDCCH. The PDCCH comprises the repetition times of the PDCCH, the scheduling delay of the PDSCH and the repetition times of the PDSCH, and the communication equipment determines the sending initial position of the PDSCH according to the repetition times of the PDCCH and the scheduling delay of the PDCCH and the PDSCH.

Then, for the communication device in the RRC-Connected state when the system information update boundary is reached, if the PDSCH does not reach the number of repetitions indicated by the PDCCH, and the system information does not change at the system information update boundary at this time. Since the system information of the communication device in the RRC-Connected state is not changed and the scheduling information of the PDSCH is not changed, the communication device can continue to receive the combined PDSCH.

It should be noted that, the downlink data transmission illustrated here is only an example, and the network device transmits the PDSCH and the communication device receives the PDSCH. Similarly, the specific implementation manner and principle of the embodiment of uplink data transmission for receiving data by the network device and sending data by the communication device are the same, and are not described again.

Preferably, for the network device, if the first broadcast information is different from the second broadcast information and the first communication resource is different from the second communication resource before and after the system information update boundary, the network device should avoid, by configuration, that the data transmitted in the enhanced coverage manner is configured to be transmitted on the different communication resources before and after the system information update boundary.

For example: as shown in fig. 8, 5 resource units in the time period from t0 to t1 before the system information update period boundary t1 may be used to transmit data, where the time length of the resource unit may be a subframe or a slot, and the resource unit may be used to transmit uplink data and/or downlink data of the network device and the communication device. At this time, since the time t1 is the system information update boundary, the network device should avoid the resource units before and after t1 from being used for repeatedly transmitting the data of the enhanced coverage. Assume that the enhanced coverage data to be configured by the network device at this time is: the data a is transmitted to the communication device a ten times and the data B is transmitted to the communication device B five times. Since only 5 resource elements are configurable for transmitting data during the time t0 to t1 before the system information update period boundary t1, the network device configures 5 resource elements before the system information update period boundary t1 for transmitting data B to communication device B. That is, the network device should avoid configuring the resource units 5 before t1 and the resource units before t2 after t1 for sending data to the communication device in the RRC _ connected state before t 2. Therefore, the data transmitted in the coverage enhancement mode is prevented from being configured on different communication resources before and after the system information updating boundary through the optimized configuration of the network equipment, the condition that the data repeatedly transmitted by the coverage enhancement is not transmitted completely when the system information updating period is on the boundary is avoided, and the utilization rate of the communication resources between the communication equipment and the network equipment is improved.

More specifically, if the data transmitted by the network device and the communication device is PDCCH. In the system information updating boundary, no matter whether the system information is changed or not, if the PDCCH does not reach the preset repeated sending times of coverage enhancement, the network equipment stops sending the PDCCH and resends the PDCCH after the starting time of the next PDCCH updating period; the communication device re-receives the PDCCH in the next PDCCH update period and needs to re-read the broadcast information, such as SIB-U, periodically transmitted by the network device before receiving the PDCCH.

Fig. 9 is a flowchart illustrating an embodiment of a system information determining method according to the present application. As shown in fig. 9, when the system information is updated, the first message sent by the network device to the communication device is a system information change instruction, and the system information change instruction is used to indicate to the communication device that the system information is changed, and the first time position is a time position at which the network device sends the system information change instruction to the communication device.

Specifically, as shown in the embodiment of the system information determining method shown in fig. 9, after receiving a system information change instruction sent by a network device, a communication device determines a system information change according to the system information change instruction; the communication equipment and the network equipment are resynchronized; the communication device starts to receive the system information sent by the network device at the boundary of the broadcast information updating period. For example: the network equipment sends the PDCCH scrambled by the P-RNTI to the communication equipment in the RRC _ Idle state in a system information updating period n according to the sending time of the paging message of the communication equipment, indicates the updating of the system information and then updates the system information in a system information updating period n + 1. Correspondingly, the communication equipment detects the PDCCH scrambled by the P-RNTI according to the paging cycle and the paging sending time of the communication equipment and detects whether the system information updating indication exists. Wherein the data transmission at least comprises the reception of the PDSCH and/or the transmission of the PUSCH. The method for determining the system information by the communication device in the RRC _ Idle state provided in this example is only an example, and the non-listed parts are determined by referring to a manner commonly used in the art, which is not specifically limited in this embodiment.

Fig. 10 is a schematic structural diagram of an embodiment of a system information determination apparatus according to the present application. As shown in fig. 10, the system information determination apparatus 10 provided in the present embodiment includes: an acquisition module 1001 and a processing module 1002. The obtaining module 1001 is configured to obtain a first message sent by a network device at a first time location; the first message is used for indicating the state of the system information acquired by the communication equipment from the network equipment, and the types of the first message acquired by the system information determining device in the Radio Resource Control (RRC) connection state and the RRC idle state are different; the processing module 1002 is configured to determine system information acquired from a network device according to the first message.

The system information determining apparatus provided in this embodiment is used to execute the system information determining method in the embodiment shown in fig. 4, and the specific implementation manner and principle are the same, and are not described again.

Optionally, in the above embodiment, the system information determining apparatus is in an RRC connected state, the first message acquired by the acquiring module 1001 is broadcast information, the starting position of the first time position is a broadcast information update cycle boundary, and the broadcast information carries available communication resources when the communication device communicates with the network device; the processing module 1002 specifically determines the system information obtained from the network device by changing the first broadcast information to the second broadcast information at the first time position according to the first message; the system information determining device keeps an RRC connection state, the first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource. In this way, the first and second electrodes can be brought into contact with each other,

optionally, in the foregoing embodiment, the processing module 1002 is specifically configured to, at a boundary of a broadcast information update period, start to receive second broadcast information repeatedly sent by the network device, where the broadcast information update period is T1, and the second broadcast information sending period is T2, where T2 is less than or equal to T1, and T2 is greater than 0; the communication equipment can correctly demodulate after receiving the second broadcast information for N times; after the broadcast information updating period boundary and before N times of receiving second broadcast information, continuing to use the first communication resource carried by the first broadcast information to carry out data transmission with the network equipment; wherein the data transmission at least comprises the reception of the PDSCH and/or the transmission of the PUSCH; after N times of receiving the second broadcast information, if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, if the times of receiving and/or sending the first data by the network equipment through the first communication resource by the communication equipment are less than the preset times, the communication equipment continues to receive and/or send the first data sent and/or received by the network equipment through the second communication resource carried by the second broadcast information; the first data at least comprises data carried by a PDSCH and/or a PUSCH; the preset number of times is a preset number of repeated transmission of the first data.

Optionally, in the foregoing embodiment, the obtaining module 1001 is specifically configured to obtain, by using a system information block SIB1 of type 1 sent by a network device, scheduling information of broadcast information; the communication device obtains first information at a first time location via the scheduling information.

Optionally, in the above embodiment, the first broadcast information and the second broadcast information are the same, and the first communication resource is the same as the second communication resource; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different; the acquiring module 1001 acquires the system information update indications in the master information blocks MIB and SIB1 sent by the network device before and after the start position of the first time position.

Optionally, in the above embodiment, the system information determining apparatus is in an RRC idle state, the first message acquired by the acquiring module 1001 is a system information change instruction, the system information change instruction is used to indicate to the system information determining apparatus that the system information is changed, and the first time position is a time position where the system information change instruction is acquired; the processing module 1002 is specifically configured to determine a system information change according to a system information change instruction; re-synchronizing with the network device; and starting to receive the system information sent by the network equipment at the boundary of the system information updating period.

The system information determining apparatus provided in this embodiment may be configured to execute the system information determining method provided in the foregoing embodiment, and specific implementation and principle thereof are the same, and are not described again.

Fig. 11 is a schematic structural diagram of an embodiment of a system information determining apparatus according to the present application. As shown in fig. 11, the system information determination apparatus 11 provided in the present embodiment includes: a sending module 1101 and a processing module 1102. The sending module 1101 is configured to send a first message to the communication device at a first time position, so that the communication device determines the system information acquired from the system information determining apparatus according to the first message; the first message is used for indicating a system information state sent by the network equipment to the communication equipment, and the types of the first message sent by the network equipment to the communication equipment in a Radio Resource Control (RRC) connected state and the communication equipment in an RRC idle state are different.

Optionally, in the above embodiment, the first message sent to the communication device in the RRC connection state is broadcast information, the starting position of the first time position is a broadcast information update cycle boundary, and the broadcast information carries available communication resources sent by the network device to the communication device; the sending module 1101 is specifically configured to change a first message sent to a communication device from first broadcast information to second broadcast information at a first time position; the first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource.

Optionally, in the foregoing embodiment, the processing module 1102 is configured to, if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, and if the number of times that the network device repeatedly sends the first data through the first communication resource is less than a preset number of times, the sending module 1101 continues to send the first data to the communication device through the second communication resource carried in the second broadcast information; the first data is at least data carried by a PDSCH and/or a PUSCH; the preset times are the preset repeated sending times of the first data.

Optionally, in the foregoing embodiment, the sending module 1101 is specifically configured to send, to the communication device, a system information block SIB1 of type 1 that carries the scheduling information of the first message, so that the communication device acquires the first message at the first time position according to the scheduling information.

Optionally, in the above embodiment, the first broadcast information and the second broadcast information are the same, and the first communication resource is the same as the second communication resource; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different; the system information update indication is the same in the master information block MIB and the system information block SIB1 sent by the sending device 1101 before the start position of the first time position and after the start position of the first time position to the communication device.

Optionally, in the above embodiment, the first message sent by the sending module 1101 to the communication device in the RRC idle state is a system information change instruction, the system information change instruction is used to indicate to the communication device that the system information is changed, and the first time position is a time position at which the system information change instruction is sent.

FIG. 12 is a schematic structural diagram of an embodiment of a terminal of the present application; as shown in fig. 12, the terminal provided in this embodiment includes: a processor 1201, a memory 1202, and an interface 1203. Wherein the memory 1202 is used for storing computer programs; the processor 1201 invokes a computer program that, when executed, performs the following: receiving a first message sent by the network device at a first time location through the interface 1203; the first message is used for indicating the state of system information acquired by the communication equipment from the network equipment, and the types of the first message received by the terminal in the Radio Resource Control (RRC) connection state and the terminal in the RRC idle state are different; the processor 1201 determines system information acquired from the network device according to the first message.

Optionally, the terminal is in an RRC connection state, the first message acquired by the communication device is broadcast information, the starting position of the first time position is a broadcast information update cycle boundary, and the broadcast information carries available communication resources when the communication device communicates with the network device;

the processor 1201 is specifically configured to determine system information acquired from a network device according to a change from first broadcast information to second broadcast information in a first time position of a first message; the terminal keeps an RRC connection state, the first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource.

Optionally, the processor 1201 is specifically configured to start receiving, at a boundary of a broadcast information update period, second broadcast information repeatedly transmitted by the network device, where the broadcast information update period is T1, the second broadcast information transmission period is T2, where T2 is less than or equal to T1, and T2 is greater than 0; the communication equipment can correctly demodulate after receiving the second broadcast information for N times;

after the broadcast information updating period boundary and before N times of receiving second broadcast information, continuing to use the first communication resource carried by the first broadcast information to carry out data transmission with the network equipment; wherein the data transmission at least comprises the reception of the PDSCH and/or the transmission of the PUSCH;

after N times of receiving the second broadcast information, if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, if the times of receiving and/or sending the first data by the network equipment through the first communication resource by the communication equipment are less than the preset times, the communication equipment continues to receive and/or send the first data sent and/or received by the network equipment through the second communication resource carried by the second broadcast information; the first data at least comprises data carried by a PDSCH and/or a PUSCH; the preset number of times is a preset number of repeated transmission of the first data.

Optionally, the system information block SIB1 of type 1 sent by the network device receives scheduling information of the broadcast information through the interface 1203; the first information is received at a first time position by the scheduling information via the interface 1203.

Optionally, the first broadcast information and the second broadcast information are the same, and the first communication resource is the same as the second communication resource; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different;

the system information update indications are the same in the master information block MIB and the SIB1 sent by the network device, which are acquired by the interface 1203 before the start position of the first time position and after the start position of the first time position.

Optionally, the terminal is in an RRC idle state, the first message is a system information change instruction, the system information change instruction is used to indicate to the communication device that the system information is changed, and the first time position is a time position where the system information change instruction is obtained;

the processor 1201 is configured to determine a system information change according to the system information change instruction; re-synchronizing with the network device; and starting to receive the system information sent by the network equipment at the boundary of the system information updating period.

The terminal provided in this embodiment may be the system information determining apparatus in the foregoing embodiment, and may be configured to execute the system information determining method provided in the foregoing embodiment, and specific implementation and principles thereof are the same and will not be described again.

Fig. 13 is a schematic structural diagram of a base station according to an embodiment of the present application. As shown in fig. 13, the base station provided in this embodiment includes: a transmitter 1301 and a processor 1302. The transmitter 1301 is configured to transmit a first message to the communication device at a first time position, so that the communication device determines, according to the first message, system information acquired from the network device; the first message is used for indicating a system information state sent by the network equipment to the communication equipment, and the types of the first message sent by the network equipment to the communication equipment in a Radio Resource Control (RRC) connected state and the communication equipment in an RRC idle state are different.

Optionally, the first message sent by the sender 1301 to the communication device in the RRC connection state is broadcast information, the starting position of the first time position is a broadcast information update cycle boundary, and the broadcast information carries available communication resources sent by the network device to the communication device;

the transmitter 1301 is specifically configured to change a first message sent to the communication device from first broadcast information to second broadcast information at a first time position; the first broadcast information carries a first communication resource, and the second broadcast information carries a second communication resource.

Optionally, the processor 1302 is configured to, if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, if the number of times that the network device repeatedly sends the first data through the first communication resource is less than a preset number of times, the sender 1301 continues to send the first data to the communication device through the second communication resource carried in the second broadcast information; the first data is at least data carried by a PDSCH and/or a PUSCH; the preset times are the preset repeated sending times of the first data.

Optionally, the transmitter 1301 transmits a system information block SIB1 of type 1 carrying the scheduling information of the first message to the communication device, so that the communication device acquires the first message at the first time position according to the scheduling information.

the transmitter 1301 transmits the master information block MIB and the system information block SIB1 in front of the starting position of the first time position and to the communication device after the starting position of the first time position, the system information update indication being the same.

Optionally, the first message sent by the transmitter 1301 to the communication apparatus in the RRC idle state is a system information change instruction, where the system information change instruction is used to indicate to the communication apparatus that the system information is changed, and the first time position is a time position where the system information change instruction is sent.

The base station provided in this embodiment may be the system information determining apparatus in the foregoing embodiment, and may be configured to execute the system information determining method provided in the foregoing embodiment, and specific implementation and principle thereof are the same, and are not described again.

The present application further provides a system information determining system, including the base station as described in any one of the embodiments of fig. 13 and a plurality of terminals as described in any one of the embodiments of fig. 12.

The present application also provides a system information determining apparatus, including: a processor and a memory for storing a program; the processor is used for calling the program stored in the memory to execute the system information determination method in any one of the above embodiments.

The present application also provides a computer readable storage medium having stored therein program code which, when executed, performs a system information determination method as in any one of the above embodiments.

The present application also provides a computer program product comprising program code that, when executed by a processor, implements the system information determination method as in any of the above embodiments.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for determining system information, comprising:

the communication equipment acquires a first message sent by the network equipment at a first time position; the first message is used for indicating the state of system information acquired by the communication equipment from the network equipment, and the type of the first message acquired by the communication equipment in a Radio Resource Control (RRC) connected state and an RRC idle state is different;

the communication equipment determines system information acquired from the network equipment according to the first message;

the communication device is in the RRC connection state, the first message acquired by the communication device is broadcast information, the starting position of the first time position is the broadcast information update cycle boundary, and the broadcast information carries available communication resources when the communication device communicates with the network device;

2. The method of claim 1, wherein the determining, by the communication device, system information obtained from the network device according to the change of the first message from first broadcast information to second broadcast information at the first time position comprises:

after the communication device receives the second broadcast information for N times, if the first broadcast information is the same as the second broadcast information and the first communication resource is the same as the second communication resource, if the number of times that the communication device receives and/or sends the first data that the network device repeatedly sends and/or receives through the first communication resource is less than a preset number of times, the communication device continues to receive and/or send the first data that the network device sends and/or receives through the second communication resource carried by the second broadcast information;

3. The method of claim 1,

the method for acquiring a first message sent by a network device at a first time position by the communication device comprises the following steps:

the communication device obtains the first message at the first time position through the scheduling information.

4. The method of claim 1,

the first broadcast information and the second broadcast information are the same, and the first communication resource and the second communication resource are the same; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different;

the system information update indication is the same in the master information block MIB and the SIB1 sent by the network device, which are acquired by the communication device before and after the start position of the first time position.

5. A method for determining system information, comprising:

the method comprises the steps that a network device sends a first message to a communication device at a first time position, so that the communication device determines system information acquired from the network device according to the first message;

the first message is used for indicating a system information state sent by the network equipment to the communication equipment, and the types of the first message sent by the network equipment to the communication equipment in a Radio Resource Control (RRC) connected state and an RRC idle state are different;

the first message sent by the network device to the communication device in the RRC connected state is broadcast information, the starting position of the first time position is the broadcast information update period boundary, and the broadcast information carries available communication resources sent by the network device to the communication device;

6. The method of claim 5, wherein the first message sent by the network device to the communication device is changed from the first broadcast information to the second broadcast information at the first time location, and thereafter further comprising:

7. The method of claim 5, wherein the network device sends a first message to a communication device at a first time location, comprising:

8. The method of claim 5, wherein the first broadcast information and the second broadcast information are the same, and wherein the first communication resource is the same as the second communication resource; or the first broadcast information and the second broadcast information are different, and the first communication resource and the second communication resource are different;

9. A system information determination apparatus, comprising:

a processor and a memory;

the memory is used for storing programs;

the processor, configured to call a program stored in the memory to perform the system information determination method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores program code which, when executed, performs the system information determination method according to any one of claims 1 to 8.