WO2018202112A1 - 获取系统信息的方法和装置 - Google Patents

获取系统信息的方法和装置 Download PDF

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Publication number
WO2018202112A1
WO2018202112A1 PCT/CN2018/085535 CN2018085535W WO2018202112A1 WO 2018202112 A1 WO2018202112 A1 WO 2018202112A1 CN 2018085535 W CN2018085535 W CN 2018085535W WO 2018202112 A1 WO2018202112 A1 WO 2018202112A1
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WIPO (PCT)
Prior art keywords
message
terminal device
time
information
resource
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PCT/CN2018/085535
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English (en)
French (fr)
Inventor
李赛楠
刘亚林
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18793794.1A priority Critical patent/EP3611943B1/en
Priority to KR1020197036007A priority patent/KR20200003188A/ko
Priority to JP2019560663A priority patent/JP2020520593A/ja
Publication of WO2018202112A1 publication Critical patent/WO2018202112A1/zh
Priority to US16/673,068 priority patent/US11102714B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel

Definitions

  • the present application relates to the field of communications, and in particular, to a method and apparatus for acquiring system information in the field of wireless communications.
  • a network device needs to send some key parameters to a terminal device through system information (SI), so that the terminal device establishes a communication connection with the network device.
  • SI system information
  • a narrow beam is needed to ensure that the signal has a long propagation distance and a high beam gain.
  • the narrow beam coverage is limited, in order to ensure communication quality.
  • Network devices and terminal devices require narrow beam alignment, ie, the network device needs to scan multiple beams to determine the narrow beam that ultimately transmits the data.
  • the present application provides a method and apparatus for acquiring an SI, which helps improve the efficiency of acquiring SI by a terminal device.
  • a method for obtaining an SI comprising: the terminal device transmitting a first message to the network device, where the first message includes first request information for requesting acquisition of the first system information SI; The device detects the second message and acquires the first SI, the second message including information for responding to the request for the request information.
  • the terminal device may send the first request information to the network device according to actual requirements, and detect the second message on the preset time-frequency resource. After receiving the first request information, the network device may request the terminal device of the first SI according to the current request.
  • the quantity determines the transmission mode of the first SI, for example, broadcast, multicast, or unicast. Therefore, the method for acquiring the SI according to the present application helps to improve the efficiency of the terminal device acquiring the SI.
  • the terminal device sends the first message to the network device, where the terminal device sends the first message to the network device by using the first code domain resource and the first time-frequency resource, where the The first code domain resource and the first time-frequency resource are part of a physical random access channel PRACH resource set, and the first code domain resource and the first time-frequency resource satisfy at least one of the following conditions,
  • the first code domain resource is used only to jointly transmit the first message with the first time-frequency resource.
  • the first time-frequency resource is only used to jointly transmit the first message with the first code domain resource.
  • the code domain resource and the time-frequency resource of the communication system are both limited.
  • the first code domain resource can transmit other messages together with the remaining time-frequency resources in the PRACH resource set, in addition to transmitting the first message together with the first time-frequency resource.
  • the first time-frequency can transmit other messages together with the remaining code domain resources in the PRACH resource set, thereby improving the reliability of the SI and improving the PRACH resource set. Utilization.
  • the first request information includes a bit bitmap, where the bit bitmap includes a number M of bits less than or equal to a number N of types of SIs included in the communication system where the terminal device is located, the bit The bitmap is used to indicate the first SI, the first SI is an SI included in the communication system, and the M and the N are positive integers.
  • the size of the first request information is fixed, and the size of the occupied resource is also fixed, which is beneficial for the network device to detect the first request message.
  • the detecting, by the terminal device, the second message, and acquiring the first SI includes:
  • the terminal device obtains, by the terminal device, the second SI from the second message, where the second SI belongs to the first SI, or the second SI includes the first SI, where
  • the first message is a message MSG1
  • the second message is a response message in the SI window corresponding to the MSG2 or the first SI, or
  • the first message is the MSG1, and the second message is a response message in the SI window corresponding to the first SI, or
  • the first message is MSG3, and the second message is MSG4, or
  • the first message is the MSG3, and the second message is a response message in the SI window corresponding to the first SI.
  • the response message and the MSI can be detected simultaneously in the preset time period, or the MSG2 and the MSI are detected at the same time; after the terminal device sends the MSG3, the response message and the MSI can be detected simultaneously in the preset time period. Alternatively, MSG4 and MSI are detected simultaneously, thereby reducing the delay in receiving SI.
  • the terminal device detects the second message and obtains the first SI, where the terminal device acquires a second SI from the second message, where the second SI belongs to the first SI, Or the second SI includes the first SI, where
  • the first message is a message MSG1
  • the second message is a response message in the MSG2 or a preset time period, or
  • the first message is MSG3, and the second message is MSG4.
  • the response message and the MSI can be detected simultaneously in the preset time period, or the MSG2 and the MSI are detected at the same time; after the terminal device sends the MSG3, the response message and the MSI can be detected simultaneously in the preset time period. Alternatively, MSG4 and MSI are detected simultaneously, thereby reducing the delay in receiving SI.
  • the detecting, by the terminal device, the second message, and acquiring the first SI includes: the terminal device acquiring a third SI from a third message, where the third SI belongs to the first SI, or The third SI includes the first SI, where
  • the first message is the MSG1
  • the second message is the MSG2 and the basic system information MSI
  • the third message is a response message received by the terminal device according to the scheduling information carried by the MSI, or
  • the first message is the MSG1
  • the second message is the MSI
  • the third message is a response message received by the terminal device according to the scheduling information carried by the MSI, or
  • the first message is the MSG3
  • the second message is the MSG4 and the MSI
  • the third message is a response message received by the terminal device according to the scheduling information carried by the MSI, or
  • the first message is the MSG3
  • the second message is the MSI
  • the third message is a response message that is received by the terminal device according to the scheduling information carried by the MSI.
  • the terminal device may only obtain a part of the first SI from the second message, or may not acquire the first SI from the second message, and the terminal device may receive the response message according to the scheduling information in the MSI, where the response message further carries Other SIs than one SI, thereby enhancing the flexibility of the terminal device to acquire the first SI.
  • the second message further includes information indicating a type of the second SI.
  • the terminal device can identify whether the information carried by the second message is information requested by the terminal device.
  • the method further includes: the terminal device retransmitting the first message to the network device in a first time unit, where the second message detection fails or the second message is not carried in the response
  • the information requesting the information the first time unit is after the second time unit, and the second time unit is a time unit for detecting the second message by the terminal device.
  • the terminal device After the terminal device sends the MSG1 in the second time unit, if the response message, the MSG2, and the MSI are not detected in the preset time period, the terminal device may retransmit the first message in the first time unit; or the terminal device is in the second time. After the unit sends the MSG3, if the response message, the MSG4, and the MSI are not detected in the preset time period, the terminal device may retransmit the first message in the first time unit.
  • the interval between the second time unit and the first time unit may be preset, or may be determined according to an indication of the network device, thereby enhancing the flexibility and reliability of acquiring the SI.
  • the method further includes: the terminal device receiving, by the network device, at least one of backoff indication information and quantity indication information, where the backoff indication information is used to indicate the first time unit and the second time An interval between units indicating the maximum number of transmissions of the MSG1.
  • the network device may instruct the terminal device to acquire the first SI restriction condition, that is, the maximum number of transmissions of the MSG1. If the number of times the terminal device transmits the MSG1 reaches the maximum number of transmissions, the first SI is not successfully obtained, indicating that the communication system or the communication is available at this time. If the environment is abnormal, the terminal device may suspend the operation of acquiring the first SI or obtain the first SI by other means, thereby enhancing the flexibility and reliability of acquiring the SI, and reducing the RACH conflict.
  • the first SI restriction condition that is, the maximum number of transmissions of the MSG1. If the number of times the terminal device transmits the MSG1 reaches the maximum number of transmissions, the first SI is not successfully obtained, indicating that the communication system or the communication is available at this time. If the environment is abnormal, the terminal device may suspend the operation of acquiring the first SI or obtain the first SI by other means, thereby enhancing the flexibility and reliability of acquiring the SI, and reducing the RACH conflict.
  • At least one of the backoff indication information and the quantity indication information is carried in an MSI.
  • the MSI is usually sent periodically in the form of a broadcast, which is convenient for the terminal device to acquire at least one of the backoff indication information and the quantity indication information in time.
  • the method further includes: the terminal device performs cell reselection, where the number of times the first message has been transmitted is equal to the maximum number of transmissions of the first message.
  • the terminal device may perform cell retransmission.
  • the cell with a lower frequency priority may be reselected according to the preset information to meet the basic communication requirement of the user.
  • a method for transmitting system information comprising: a network device receiving a first message from a terminal device, the first message including first request information for requesting acquisition of first system information SI; the network The device sends a second message to the terminal device, the second message including information for responding to the request for the request information.
  • the terminal device may send the first request information to the network device according to actual requirements, and detect the second message on the preset time-frequency resource. After receiving the first request information, the network device may request the terminal device of the first SI according to the current request.
  • the quantity determines the transmission mode of the first SI, for example, broadcast, multicast, or unicast. Therefore, the method for transmitting the SI according to the present application helps to improve the efficiency of the terminal device acquiring the SI.
  • the receiving, by the network device, the first message from the terminal device that: the network device receives the first message from the terminal device by using a first code domain resource and a first time-frequency resource, where The first code domain resource and the first time-frequency resource are part of a physical random access channel PRACH resource set, and the first code domain resource and the first time-frequency resource satisfy at least one of the following conditions,
  • the first code domain resource is used only to jointly transmit the first message with the first time-frequency resource.
  • the first time-frequency resource is only used to jointly transmit the first message with the first code domain resource.
  • the code domain resource and the time-frequency resource of the PRACH resource set are both limited.
  • the first code domain resource may transmit other messages together with the remaining time-frequency resources in the PRACH resource set, in addition to transmitting the first message together with the first time-frequency resource.
  • the first time-frequency can transmit other messages together with the remaining code domain resources in the PRACH resource set, thereby improving the reliability of the SI and improving the PRACH resource.
  • the utilization of the collection is not limited.
  • the first request information includes a bit bitmap, where the bit bitmap includes a number M of bits less than or equal to a number N of types of SIs included in the communication system where the terminal device is located, the bit The bitmap is used to indicate the first SI, the first SI is an SI included in the communication system, and the M and the N are positive integers.
  • the size of the first request information is fixed, and the size of the occupied resource is also fixed, which is beneficial for the network device to detect the first request message.
  • the second message includes a second SI, the second SI belongs to the first SI, or the second SI includes the first SI, where
  • the first message is a message MSG1
  • the second message is a response message in the SI window corresponding to the MSG2 or the first SI, or
  • the first message is the MSG1, and the second message is a response message in the SI window corresponding to the first SI, or
  • the first message is MSG3, and the second message is MSG4, or
  • the first message is the MSG3, and the second message is a response message in the SI window corresponding to the first SI.
  • the second message includes a second SI, the second SI belongs to the first SI, or the second SI includes the first SI, where
  • the first message is a message MSG1
  • the second message is a response message in the MSG2 or a preset time period, or
  • the first message is MSG3, and the second message is MSG4.
  • the network device may send part or all of the content of the first SI to the terminal device by using the second message, and the network device may also carry other SIs other than the first SI in the second message, thereby enhancing the terminal device to acquire the first SI. Flexibility.
  • the method further includes: the network device sending a third message to the terminal device, where the third message includes a third SI, the third SI belongs to the first SI, or the third SI Including the first SI, wherein
  • the first message is the MSG1
  • the second message is the MSG2 or the MSI
  • the third message is a response message scheduled by the scheduling information carried by the MSI, or
  • the first message is the MSG1
  • the second message is the MSI
  • the third message is a response message scheduled by the scheduling information carried by the MSI, or
  • the first message is the MSG3
  • the second message is the MSG4 and the MSI
  • the third message is a response message scheduled by the scheduling information carried by the MSI, or
  • the first message is the MSG3
  • the second message is the MSI
  • the third message is a response message scheduled by the scheduling information carried by the MSI.
  • the network device may determine the SI carried by the second message according to the actual situation. For example, when there are more terminal devices requesting the first SI, the network device may select to receive the broadcast message including the first SI by using the MSI scheduling terminal device, and send the message without using other messages.
  • the first SI when the size of the first SI is large, the network device may choose to carry a part of the first SI in the MSG2 or the MSG4, and the remaining part of the first SI may be sent to the terminal device by using a response message scheduled by the MSI, the response message It also carries other SIs than the first SI, thereby enhancing the flexibility of the terminal device to acquire the first SI.
  • the second message further includes information indicating a type of the second SI.
  • the terminal device can identify whether the information carried by the second message is information requested by the terminal device.
  • the method further includes: the network device sending, to the terminal device, at least one of a backoff indication information and a quantity indication information, where the backoff indication information is used to instruct the terminal device to retransmit the first message The time interval, the quantity indication information is used to indicate the maximum number of transmissions of the MSG1.
  • the network device may instruct the terminal device to acquire the first SI restriction condition, that is, the maximum number of transmissions of the MSG1. If the number of times the terminal device transmits the MSG1 reaches the maximum number of transmissions, the first SI is not successfully obtained, indicating that the communication system or the communication is available at this time. If the environment is abnormal, the terminal device may suspend the operation of acquiring the first SI or obtain the first SI by other means, thereby enhancing the flexibility and reliability of acquiring the SI.
  • the first SI restriction condition that is, the maximum number of transmissions of the MSG1. If the number of times the terminal device transmits the MSG1 reaches the maximum number of transmissions, the first SI is not successfully obtained, indicating that the communication system or the communication is available at this time. If the environment is abnormal, the terminal device may suspend the operation of acquiring the first SI or obtain the first SI by other means, thereby enhancing the flexibility and reliability of acquiring the SI.
  • At least one of the backoff indication information and the quantity indication information is carried in the MSI.
  • the MSI is usually sent periodically in the form of a broadcast, which is convenient for the terminal device to acquire at least one of the backoff indication information and the quantity indication information in time.
  • the present application provides an apparatus for acquiring an SI, where the apparatus can implement the functions performed by the terminal device in the method related to the foregoing aspects, and the functions can be implemented by using hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more corresponding units or modules of the above functions.
  • the apparatus includes a processor and a transceiver configured to support the apparatus to perform the corresponding functions of the above methods.
  • the transceiver is used to support communication between the device and other network elements.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • the present application provides an apparatus for transmitting an SI, where the apparatus can implement the functions performed by the network device in the method related to the foregoing aspects, and the functions can be implemented by using hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more corresponding units or modules of the above functions.
  • the apparatus includes a processor and a transceiver configured to support the apparatus to perform the corresponding functions of the above methods.
  • the transceiver is used to support communication between the device and other network elements.
  • the apparatus can also include a memory for coupling with the processor that retains the program instructions and data necessary for the apparatus.
  • a network system comprising the apparatus for acquiring SI and the apparatus for transmitting SI as described in the various aspects above.
  • a computer program product comprising: computer program code, when the computer program code is run by a communication unit, a processing unit or a transceiver of a terminal device, or a processor, causing the terminal device Perform the method in the above implementation.
  • a computer program product comprising: computer program code, when the computer program code is run by a communication unit, a processing unit or a transceiver of a terminal device, or a processor, causing a network device Perform the method in the above implementation.
  • the present application provides a computer storage medium for storing computer software instructions for use in the terminal device described above, including a program designed to perform the above aspects.
  • the present application provides a computer storage medium for storing computer software instructions for use with the network device described above, including a program designed to perform the above aspects.
  • the present application provides a communication chip in which instructions are stored that, when run on a terminal device, cause the communication chip to perform the methods of the various aspects described above.
  • the present application provides a communication chip in which instructions are stored that, when run on a network device, cause the communication chip to perform the methods of the various aspects described above.
  • the application provides a method for obtaining an SI, including:
  • One or more RACH resources can be used for SI requests and only a limited preamble sequence and limited RACH resources are reserved for SI requests. The case where the reserved preamble sequence is used for SI requests on all RACH resources should be avoided.
  • the terminal device continues to detect the requested SI after performing the backoff operation
  • the backoff indication and the maximum number of requests for the SI request are included in the MSI.
  • the terminal device marks the requested SI as a process in which the cell cannot acquire and continues to camp on the cell, or the UE triggers cell reselection.
  • Figure 1 is a communication system to which the present application is applied;
  • FIG. 2 is a schematic diagram of a method for acquiring SI provided by the present application.
  • FIG. 3 is a schematic diagram of a PRACH resource provided by the present application.
  • FIG. 4 is a schematic diagram of a PRACH resource centralized mapping manner provided by the present application.
  • FIG. 5 is a schematic diagram of a PRACH resource discrete mapping manner provided by the present application.
  • FIG. 6 is a schematic diagram of a bit bitmap provided by the present application.
  • FIG. 7 is a schematic diagram of another method for acquiring SI provided by the present application.
  • FIG. 8 is a schematic diagram of still another method for acquiring SI according to the present application.
  • FIG. 9 is a schematic diagram of still another method for acquiring SI provided by the present application.
  • FIG. 10 is a schematic diagram of a method for transmitting SI according to the present application.
  • FIG. 11 is a schematic diagram of a possible terminal device provided by the present application.
  • FIG. 13 is a schematic diagram of a possible network device provided by the present application.
  • FIG. 14 is a schematic diagram of another possible network device provided by the present application.
  • FIG. 1 illustrates a communication system 100 to which the present application is applied.
  • the communication system 100 includes a network device 110 and a terminal device 120.
  • the network device 110 and the terminal device 120 communicate through a wireless network.
  • the wireless communication module can encode the information for transmission.
  • the wireless communication module can acquire a certain number of data bits to be transmitted over the channel to the network device 110, such as data bits generated by the processing module, received from other devices, or saved in the storage module.
  • These data bits may be included in one or more transport blocks (which may also be referred to as information blocks or data blocks) that may be segmented to produce a plurality of coded blocks.
  • a terminal device may be referred to as an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, and a wireless device.
  • Communication device user agent or user device.
  • the access terminal can be a cellular telephone, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, and a 5th-generation (5G) mobile communication system.
  • 5G 5th-generation
  • the network device may be a base transceiver station (BTS) in a code division multiple access (CDMA) system, or may be a base station in a wideband code division multiple access (WCDMA) system (
  • the node B, NB) may also be an evolved base station (eNB) in a long term evolution (LTE) system, or may be a base station (gNB) in a 5G mobile communication system, where the base station is only
  • the network device may also be a relay station, an access point, an in-vehicle device, a wearable device, and other types of devices.
  • the communication system to which the present application is applied is merely an example.
  • the communication system to which the present application is applied is not limited thereto.
  • the number of network devices and terminal devices included in the communication system may be other numbers.
  • the SI in the communication system can be organized by means of a system information block (SIB).
  • SIB system information block
  • Each SIB aggregates related parameters of a certain function. For example, there are three SIs in the current communication system: a, b, and c.
  • the base station may send a to form an SIB to the UE, and may also send a and b to form an SIB to the UE, and may also send a and b and c to form an SIB and send the same to the UE.
  • the SIB includes the following: (1) a master information block (MIB): basic parameters required when the UE initially accesses the network; (2) SIB1: parameters related to cell access and cell selection, Time domain scheduling information of other SIBs; (3) SIB2: public radio resource configuration information; (4) SIB3 to SIB8: used to control inter-frequency, inter-frequency and inter-access network (inter-random access technologies, Inter-RAT) Parameters of cell reselection; (5) SIB9: home base station name; (6) SIB10 to SIB12: earthquake tsunami warning message. and many more.
  • the MIB is carried by a physical broadcast channel (PBCH), and the transmission period is fixed to 40 milliseconds (ms).
  • PBCH physical broadcast channel
  • ms milliseconds
  • the SIB1 is carried by a physical downlink shared channel (PDSCH), and the transmission period is fixed for 80 ms.
  • the SIB is included in the SI message by scheduling transmission.
  • Each SI message may include one or more SIBs, and the SI message is carried over the PDSCH, and the transmission period may be matched.
  • MSI minimum system information
  • OSI system information
  • Some OSIs are triggered by the network device. Some OSIs require the UE to request the network device to send. This part is the on-demand OSI.
  • the UE in the connected state may send an OSI acquisition request by using specific signaling (for example, Radio Resource Control (RRC) signaling or control signaling), and is in an idle state or an inactive state.
  • RRC Radio Resource Control
  • the UE needs to send an OSI acquisition request through a message (MSG) 1 or MSG3 in the random access procedure.
  • MSG message
  • FIG. 2 shows a schematic diagram of a method for acquiring SI provided by the present application.
  • the method 200 includes:
  • the terminal device sends a first message to the network device, where the first message includes first request information for requesting to acquire the first system information SI.
  • the terminal device detects a second message and acquires the first SI, where the second message includes information for responding to the request for the request information.
  • the technical solution of the present application is described in detail below by taking the terminal device as the UE and the network device as the base station.
  • the first message is any one of the first request information, and the name and the sending manner of the first message are not limited in this application.
  • the first SI is the SI required by the UE, and the UE may first detect the MSI, and determine whether the first SI is carried in the broadcast message according to the scheduling information carried in the MSI, where the scheduling information is used to indicate which OSIs are scheduled by the MSI, and if the UE determines the base station The UE does not schedule the first SI, and the UE sends the first request information to the base station.
  • the UE may also directly send to the base station without waiting for the broadcast message of the base station.
  • First request information for example, in an ultra reliable & low latency communication (URLLC) scenario, in order to reduce the delay as much as possible, the UE may also directly send to the base station without waiting for the broadcast message of the base station.
  • URLLC ultra reliable & low latency communication
  • the UE may send the first request information to the base station according to the actual requirement, and detect the second message on the preset time-frequency resource. After receiving the first request information, the base station may determine the number of the terminal device that requests the first SI according to the current request.
  • the method of obtaining the SI for example, broadcast, multicast, or unicast. Therefore, the method for obtaining the SI according to the present application helps to improve the efficiency of the UE acquiring the SI.
  • the terminal device sends the first message to the network device, including:
  • the terminal device sends the first message to the network device by using a first code domain resource and a first time-frequency resource, where the first code domain resource and the first time-frequency resource are physically random. a part of resources of a physical random access channel (PRACH) resource set, where the first code domain resource and the first time-frequency resource satisfy at least one of the following conditions,
  • PRACH physical random access channel
  • the first code domain resource is used only to jointly transmit the first message with the first time-frequency resource.
  • the first time-frequency resource is only used to jointly transmit the first message with the first code domain resource.
  • the PRACH time-frequency resources are also limited. Therefore, if a set of preamble sequences are used for transmitting on all PRACH time-frequency resources.
  • the first request information the number of preamble sequences used for random access is correspondingly reduced, and the collision probability of the random access channel (RACH) is increased.
  • RACH random access channel
  • the domain resource in addition to transmitting the first message together with the first time-frequency resource, may initiate the RACH together with the remaining time-frequency resources in the PRACH resource set, where the first time-frequency resource transmits the first message together with the first code domain resource,
  • the RACH may also be initiated together with the remaining code domain resources in the PRACH resource set, thereby improving the utilization of the PRACH resource set while ensuring the reliability of the acquired SI.
  • Figure 3 shows a PRACH resource set.
  • the set of PRACH resources includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols, and each OFDM symbol can be received by one or more beams, where the PRACH is an uplink resource, and the base station scans by using an uplink beam.
  • Receive MSG1 sent by the UE in different directions. Different beams correspond to different antenna ports, and one round of beam scanning covering the entire cell is called a PRACH resource set.
  • the communication protocol may predefine a set of preamble sequences as a dedicated preamble sequence for transmitting the SI request, and select a part of the time-frequency resources in the PRACH resource set as the dedicated time-frequency resource for transmitting the SI request, for example, may select a part of the PRACH resource set. Or all time-frequency resources, wherein the period of the SI request may be an integer multiple of the RACH period.
  • the dedicated preamble sequence is used to send the SI acquisition request in the dedicated time-frequency resource, and the other preamble sequence may initiate the RACH on the dedicated time-frequency resource, and all the preamble sequences may initiate the RACH on the dedicated time-frequency resource.
  • Figure 4 shows a schematic diagram of the mapping of a dedicated preamble sequence.
  • all dedicated preamble sequences are mapped on a continuous time-frequency resource.
  • the preamble sequences 1 to 20 are dedicated preamble sequences, which are all mapped on the time-frequency resource block shown in FIG.
  • the preamble sequence corresponding to all SIB requests or SI requests is sent on the same PRACH time-frequency resource, and the delay is small, but conflicts may occur due to simultaneous transmission of a large number of SI requests.
  • Figure 5 shows a schematic diagram of the mapping of another dedicated preamble sequence.
  • the dedicated preamble sequence is mapped on discrete time-frequency resources.
  • the preamble sequence corresponding to different SIB requests or SI requests is distributed and mapped on different PRACH time-frequency resources, so as to avoid conflicts caused by a large number of simultaneous SI requests, but corresponding to each SIB request or SI
  • the requesting preamble sequence is sent to wait for the corresponding PRACH time-frequency resource, which may cause the delay of the SI request to increase.
  • the first request information includes a bit bitmap, where the bit bitmap includes a number M of bits less than or equal to a number N of types of SIs included in the communication system where the terminal device is located, the bit The bitmap is used to indicate the first SI, the first SI is an SI included in the communication system, and the M and the N are positive integers.
  • the first SI request information may be information that the UE and the base station agree on, for example, the bit "10" represents one SI, and the bit "01" represents another SI.
  • the first SI request information may also be in the form of a bit bitmap.
  • the bit bitmap may include N bits, and the N bits correspond to all or part of The number of OSIs; the bitmap may also include M bits corresponding to the number of types of all SIs included in the communication system in which the UE is located.
  • the bit bitmap includes N bits, each small square represents one bit, each bit has two states of "1” and "0", and each bit corresponds to one SI, when When the bit is "1", the UE is requested to acquire the SI; when the bit is "0", the UE is not required to represent the SI.
  • the bit map shown in FIG. 6 indicates that the UE requests acquisition of SIBx, SIBy, and SIBz.
  • the size of the first request information is fixed, and the size of the occupied resource is also fixed, which is beneficial for the network device to detect the first request message.
  • the detecting, by the terminal device, the second message, and acquiring the first SI includes:
  • the terminal device acquires a second SI from the second message, where the second SI belongs to the first SI, or the second SI includes the first SI, where
  • the first message is a message MSG1
  • the second message is a response message in the MSG2 or a preset time period, or
  • the first message is MSG3, and the second message is MSG4.
  • the response message in the SI window indicated by the response message and the scheduling information in the MSI may be detected simultaneously in a preset time period, or may be detected in the SI window indicated by the scheduling information in the MSG2 and the MSI.
  • the terminal device can simultaneously detect the response message in the SI window indicated by the response message and the scheduling information in the MSI within a preset time period, or simultaneously detect the SI indicated by the scheduling information in the MSG4 and the MSI.
  • a response message in the window thereby reducing the latency of receiving the SI.
  • the network device may send part or all of the content of the first SI to the terminal device by using the second message, and the network device may also carry other SIs other than the first SI in the second message, thereby enhancing the terminal device to acquire the first SI. Flexibility.
  • the UE may listen to the physical downlink control channel (PDCCH) in the response window (ie, the preset time period), and expect to obtain the SI window indicated by the scheduling information in the MSI. Response message.
  • the response window may be a period of time having a preset relationship with the time-frequency resource occupied by the first message, for example, a period of interval m (m is a positive integer) or a period of the slot after the first message is sent, and the size of the m
  • the length of the response window may be specified by a communication protocol, or may be configured by a base station.
  • FIG. 7 shows a schematic flowchart of another method for acquiring SI provided by the present application.
  • the base station determines that certain SIBs corresponding to the OSIs to be sent need to be requested by the MSG1, the base station will use the preamble sequence corresponding to the SIBs (ie, the dedicated preamble sequence) and/or the time in the PRACH resource set.
  • the frequency resource informs the UE through the MSI, where each dedicated preamble sequence corresponds to one or more OSIs corresponding to the OSI.
  • the UE may first read the scheduling information of the OSI in the MSI, and determine whether the OSI is being broadcasted. If the scheduling information in the MSI indicates that the SIB is broadcasting, The UE directly reads the SIB being broadcast according to the scheduling information. If the scheduling information in the MSI indicates that the SIB is not being broadcast, the UE determines whether the preamble sequence and/or the PRACH time-frequency resource corresponding to the SIB is included in the MSI.
  • the UE sends the first request information to the base station by using the corresponding preamble sequence and/or the PRACH time-frequency resource, where the first request information is sent. It is carried in MSG1.
  • the UE After the first request information is sent by the MSG1, the UE needs to monitor the PDCCH in the corresponding response window and simultaneously according to the scheduling information of the OSI in the MSI, and detect the requested SIB carried in the corresponding SI window. If the base station broadcasts the first SI and carries the scheduling information of the first SI in the MSI, the UE detects and reads the first SI in the corresponding SI window according to the read scheduling information; if the base station unicasts or multicasts Sending the first SI, the UE detects the first SI in a corresponding response window.
  • the base station After receiving the first request information sent by the UE, the base station determines whether the requested SI is sent to the UE by means of broadcast, unicast, or multicast.
  • the base station may select to broadcast the SIB corresponding to the first SI in the SI window; if the base station only receives the individual UE to send For the request of the first SI, the base station may select the unicast or multicast mode to send the SIB corresponding to the first SI.
  • the first SI may be carried by the PDSCH, and the PDCCH is scheduled (indicating the time-frequency resource location), the PDCCH may be scrambled by the SI-RNTI, and the UE is blindly checking the system information radio network temporary identity in the corresponding response window. SI-RNTI) scrambled PDCCH to obtain the corresponding first SI.
  • the different OSIs may correspond to different SI-RNTIs for the UE to identify the requested OSI. Alternatively, all the OSIs corresponding to the same SI-RNTI may carry the message indicating the first SI in the message carrying the first SI.
  • the information indicates which one or which SIs the first SI is, and the information may be a media access control (MAC) control element (CE).
  • MAC media access control
  • FIG. 8 is a schematic flowchart of still another method for acquiring SI provided by the present application.
  • S810 to S840 are the same as S710 to S740 in FIG. 7, and details are not described herein again.
  • the base station determines whether the requested SI is sent to the UE by means of broadcast, unicast or multicast.
  • the base station may choose to broadcast and transmit the SIB in the corresponding SI window, and carry the scheduling information of the SIB in the MSI;
  • the base station may select the unicast or multicast mode to send the requested SIB. In this case, the base station may directly carry the SIB in the random access response.
  • the RAR is sent to the UE, and the scheduling information of the SIB may be carried in the RAR and sent to the UE, so that the UE receives the requested SIB in the response time-frequency resource location, and the resource indication information may include the SIB requested by the UE.
  • Type valid tag (value tag / Index), period and SI window information (SI window time length, resource start position, etc.).
  • ACK acknowledgement
  • the base station may carry an acknowledgement (ACK) in the RAR, whether it is a broadcast, a unicast or a multicast, indicating that the UE has successfully received the SI request.
  • the UE After the UE sends the SI acquisition request through the MSG1, the UE needs to detect the requested SIB carried in the SI window indicated by the scheduling information in the MSI.
  • the RAR can be carried by the PDSCH in the 5G communication system, and is scheduled by the PDCCH.
  • the PDCCH can be scrambled by a random access radio network temporary identity (RA-RNTI) in the same manner as the LTE system.
  • RA-RNTI random access radio network temporary identity
  • the content of the message included in the RAR of the method 800 is different.
  • the content of the RAR in the method 800 includes: a preamble id, an SIB message, and an SIB type indication (ie, which SIBs are indicated).
  • the scheduling information of the SIB indicates at least one of information such as an ACK that has successfully received the SI request.
  • the detecting, by the terminal device, the second message, and acquiring the first SI includes:
  • the terminal device acquires a third SI from a third message, where the third SI belongs to the first SI, or the third SI includes the first SI, where
  • the first message is the MSG1
  • the second message is the MSG2 and the basic system information MSI
  • the third message is a response message received by the terminal device according to the scheduling information carried by the MSI, or
  • the first message is the MSG1
  • the second message is the MSI
  • the third message is a response message received by the terminal device according to the scheduling information carried by the MSI, or
  • the first message is the MSG3
  • the second message is the MSG4 and the MSI
  • the third message is a response message received by the terminal device according to the scheduling information carried by the MSI, or
  • the first message is the MSG3
  • the second message is the MSI
  • the third message is a response message that is received by the terminal device according to the scheduling information carried by the MSI.
  • the terminal device may only obtain a part of the first SI from the second message, or may not acquire the first SI from the second message, and the terminal device may receive the response message according to the scheduling information in the MSI, where the response message further carries Other SIs than one SI, thereby enhancing the flexibility of the terminal device to acquire the first SI.
  • FIG. 9 is a schematic flowchart of still another method for acquiring SI provided by the present application.
  • S910 is the same as S710 in FIG. 7, and details are not described herein again.
  • the UE chooses to send MSG1 through the preamble sequence for random access and the PRACH time-frequency resource.
  • S930 The UE receives the MSG2 (RAR). If the identifier of the preamble sequence sent by the UE is included in the MSG2, the UE considers that the RAR is successfully received.
  • the UE sends an SI request by using the MSG3, where the information included in the MSG is: a UE identifier (temporary identifier), an SI request (including the requested SIB type), and the SI request may be, for example, in the form of a bit bitmap.
  • a UE identifier temporary identifier
  • SI request including the requested SIB type
  • the SI request may be, for example, in the form of a bit bitmap.
  • the UE After sending the SI acquisition request by the MSG3, the UE needs to detect the requested SIB carried in the SI window indicated by the scheduling information in the MSI and simultaneously receive the MSG4. If the base station decides to send the SIB requested by the UE through multicast or unicast, the SIB requested by the UE is sent through the MSG4. Sometimes the UE requests more SIBs, and the MSG4 cannot carry all the SIBs in one downlink transport block. The base station carries the indication information indicating that the remaining SIBs need to be further scheduled in the MSG4, and the UE receives the indication information in the MSG4.
  • the UE may continue to detect the PDCCH of the subsequent subframe (or the time slot), and the duration of the PDCCH may be preset. The UE may stop receiving after receiving the remaining SIBs in the time period. If the base station decides to broadcast the SIB requested by the UE, the UE reads the broadcast SIB according to the scheduling information in the MSI.
  • the second message further includes information indicating a type of the second SI.
  • the terminal device can identify whether the information carried by the second message is information requested by the terminal device.
  • the method 200 further includes:
  • the terminal device retransmits the first message to the network device in a first time unit, where the second message detection fails or the second message does not carry a request for responding to the request information.
  • the information, the first time unit is after the second time unit, and the second time unit is a time unit for the terminal device to detect the second message.
  • the UE After the UE sends the MSG1 in the second time unit, if the response message and the MSI are not detected in the preset time period, or the MSG2 and the MSI are not detected in the preset time period; or, after the UE sends the MSG3 in the second time unit, If the response message and the MSI are not detected in the preset time period, or if the MSG 4 and the MSI are not detected in the preset time period, the UE may retransmit the first message in the first time unit.
  • the interval between the second time unit and the first time unit may be preset, or may be determined according to an indication of the base station, thereby enhancing the flexibility and reliability of acquiring the SI.
  • the method 200 further includes:
  • the terminal device receives at least one of backoff indication information and quantity indication information from the network device, where the backoff indication information is used to indicate the first time unit and the second time unit The interval between the number indication information is used to indicate the maximum number of transmissions of the MSG1.
  • the base station may instruct the UE to obtain the first SI restriction condition, that is, the maximum number of transmissions of the MSG1. If the number of times the UE transmits the MSG1 reaches the maximum number of transmissions, the first SI is not successfully obtained, indicating that the communication system or the communication environment is abnormal.
  • the terminal device may suspend the operation of acquiring the first SI or obtain the first SI by other means, thereby enhancing the flexibility and reliability of acquiring the SI, and reducing the RACH conflict.
  • the UE may perform the backoff operation and wait for the backoff time (back off).
  • the backoff indication information indicates a number or a sequence number or an index number that can be the backoff time.
  • the correspondence between the backoff indication information and the backoff time may be predefined by the communication protocol.
  • the backoff time of the SI request may be the same as the backoff time of the RACH, or may be different from the backoff time of the RACH.
  • the maximum number of times that the first SI is requested by the MSG1 may be the maximum number of times the UE sends a beam request through the same uplink, or may be the maximum number of uplink transmit beams that the UE requests.
  • the maximum number of times the first SI is requested by the MSG1 needs to satisfy at least one of the above two conditions.
  • the UE may also determine the backoff time and the maximum number of transmissions of the MSG1 according to the preset information, where the preset information may be configured by the base station or may be predefined by the communication protocol.
  • At least one of the backoff indication information and the quantity indication information is carried in an MSI.
  • the MSI is usually sent periodically in the form of a broadcast, which is convenient for the terminal device to acquire at least one of the backoff indication information and the quantity indication information in time.
  • At least one of the backoff indication information and the quantity indication information may also be carried in the RAR according to the application scenario.
  • the present application does not limit the specific form and the sending manner of the back-off instruction information and the quantity indication information.
  • the method 200 further includes:
  • the terminal device performs cell reselection, where the number of times the first message has been transmitted is equal to the maximum number of transmissions of the first message.
  • the terminal device may perform cell retransmission.
  • the cell with a lower frequency priority may be reselected according to the preset information to meet the basic communication requirement of the user.
  • the method for obtaining SI provided by the present application is introduced from the perspective of a terminal device.
  • the method for transmitting SI provided by the present application is introduced from the perspective of a network device.
  • FIG. 10 is a schematic flowchart of a method for transmitting system information provided by the present application.
  • the method 300 includes:
  • the network device receives the first message from the terminal device, where the first message includes first request information for requesting to acquire the first system information SI.
  • the network device sends a second message to the terminal device, where the second message includes information for responding to the request for the request information.
  • both the network device and the terminal device can be identical to the network device and the terminal device in the method 200, and the actions of the network device and the terminal device and the access network in the method 200
  • the functions of the device and the terminal device correspond to each other, and are not described here for brevity.
  • the terminal device may send the first request information to the network device according to an actual requirement, and detect the second message on the preset time-frequency resource, and the network device receives the first request information.
  • the method for sending the SI according to the method for sending the SI according to the present application may be used to improve the terminal device according to the number of the terminal devices that are currently requesting the first SI, for example, broadcast, multicast, or unicast. The efficiency of SI.
  • the receiving, by the network device, the first message from the terminal device includes:
  • the network device receives the first message from the terminal device by using a first code domain resource and a first time-frequency resource, where the first code domain resource and the first time-frequency resource are physically random. Accessing a part of resources of the channel PRACH resource set, where the first code domain resource and the first time-frequency resource satisfy at least one of the following conditions,
  • the first code domain resource is used only to jointly transmit the first message with the first time-frequency resource.
  • the first time-frequency resource is only used to jointly transmit the first message with the first code domain resource.
  • the code domain resource and the time-frequency resource of the PRACH resource set are both limited.
  • the first code domain resource may transmit other messages together with the remaining time-frequency resources in the PRACH resource set, in addition to transmitting the first message together with the first time-frequency resource.
  • the first time-frequency can transmit other messages together with the remaining code domain resources in the PRACH resource set, thereby improving the reliability of the SI and improving the PRACH resource.
  • the utilization of the collection is not limited.
  • the first request information includes a bit bitmap, where the bit bitmap includes a number M of bits less than or equal to a number N of types of SIs included in the communication system where the network device is located, the bit The bitmap is used to indicate the first SI, the first SI is an SI included in the communication system, and the M and the N are positive integers.
  • the size of the first request information is fixed, and the size of the occupied resource is also fixed, which is beneficial for the network device to detect the first request message.
  • the second message includes a second SI, the second SI belongs to the first SI, or the second SI includes the first SI, where
  • the first message is a message MSG1
  • the second message is a response message in the MSG2 or a preset time period, or
  • the first message is MSG3, and the second message is MSG4.
  • the network device may send part or all of the content of the first SI to the terminal device by using the second message, and the network device may also carry other SIs other than the first SI in the second message, thereby enhancing the terminal device to acquire the first SI. Flexibility.
  • the method 300 further includes:
  • the network device sends a third message to the terminal device, where the third message includes a third SI, the third SI belongs to the first SI, or the third SI includes the first SI, where,
  • the first message is the MSG1
  • the second message is the MSG2 or the MSI
  • the third message is a response message scheduled by the scheduling information carried by the MSI, or
  • the first message is the MSG1
  • the second message is the MSI
  • the third message is a response message scheduled by the scheduling information carried by the MSI, or
  • the first message is the MSG3
  • the second message is the MSG4 and the MSI
  • the third message is a response message scheduled by the scheduling information carried by the MSI, or
  • the first message is the MSG3
  • the second message is the MSI
  • the third message is a response message scheduled by the scheduling information carried by the MSI.
  • the network device may determine the SI carried by the second message according to the actual situation. For example, when there are more terminal devices requesting the first SI, the network device may select to receive the broadcast message including the first SI by using the MSI scheduling terminal device, and send the message without using other messages. a first SI; when the size of the first SI is large, the network device may choose to carry a part of the first SI in the MSG2 or the MSG4, and the remaining part of the first SI may be sent to the terminal device by using a response message scheduled by the MSI, and the response message is sent. It also carries other SIs than the first SI, thereby enhancing the flexibility of the terminal device to acquire the first SI.
  • the second message further includes information indicating a type of the second SI.
  • the terminal device can identify whether the information carried by the second message is information requested by the terminal device.
  • the method 300 further includes:
  • the network device sends, to the terminal device, at least one of a backoff indication information and a quantity indication information, where the backoff indication information is used to indicate a time interval at which the terminal device retransmits the first message,
  • the quantity indication information is used to indicate the maximum number of transmissions of the MSG1.
  • the network device may instruct the terminal device to acquire the first SI restriction condition, that is, the maximum number of transmissions of the MSG1. If the number of times the terminal device transmits the MSG1 reaches the maximum number of transmissions, the first SI is not successfully obtained, indicating that the communication system or the communication is available at this time. If the environment is abnormal, the terminal device may suspend the operation of acquiring the first SI or obtain the first SI by other means, thereby enhancing the flexibility and reliability of acquiring the SI.
  • the first SI restriction condition that is, the maximum number of transmissions of the MSG1. If the number of times the terminal device transmits the MSG1 reaches the maximum number of transmissions, the first SI is not successfully obtained, indicating that the communication system or the communication is available at this time. If the environment is abnormal, the terminal device may suspend the operation of acquiring the first SI or obtain the first SI by other means, thereby enhancing the flexibility and reliability of acquiring the SI.
  • At least one of the backoff indication information and the quantity indication information is carried in the MSI.
  • the MSI is usually sent periodically in the form of a broadcast, which is convenient for the terminal device to acquire at least one of the backoff indication information and the quantity indication information in time.
  • the terminal device and the network device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above functions.
  • the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • the present application may divide a functional unit into a terminal device or the like according to the above method example.
  • each functional unit may be divided according to each function, or two or more functions may be integrated into one processing unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. It should be noted that the division of the unit in the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 11 shows a possible structural diagram of the terminal device involved in the above embodiment.
  • the terminal device 1100 includes a processing unit 1102 and a communication unit 1103.
  • the processing unit 1102 is configured to control and manage the actions of the terminal device 1100.
  • the processing unit 1102 is configured to support the terminal device 1100 to perform S220 of FIG. 2 and/or other processes for the techniques described herein.
  • the communication unit 1103 is for supporting communication between the terminal device 1100 and other network entities, such as communication with network devices.
  • the terminal device 1100 may further include a storage unit 1101 for storing program codes and data of the terminal device 1100.
  • the processing unit 1102 can be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (application-specific). Integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication unit 1103 can be a transceiver, a transceiver circuit, or the like.
  • the storage unit 1101 may be a memory.
  • the terminal device involved in the present application may be the terminal device shown in FIG.
  • the terminal device 1200 includes a processor 1202, a transceiver 1203, and a memory 1201.
  • the transceiver 1203, the processor 1202, and the memory 1201 can communicate with each other through an internal connection path to transfer control and/or data signals.
  • the terminal device 1100 and the terminal device 1200 provided by the present application may send the first request information to the network device according to actual requirements, and detect the second message on the preset time-frequency resource.
  • the network device may The sending manner of the first SI, for example, broadcast, multicast, or unicast, is determined according to the number of the terminal devices that are currently requesting the first SI, thereby helping to improve the efficiency of the terminal device acquiring the SI.
  • FIG. 13 shows a possible structural diagram of the network device involved in the above embodiment.
  • the network device 1300 includes a processing unit 1302 and a communication unit 1303.
  • the processing unit 1302 is configured to control and manage the actions of the network device 1300.
  • the processing unit 1302 is configured to support the network device 1300 to perform S310 of FIG. 10 and/or other processes for the techniques described herein through the communication unit 1303.
  • the communication unit 1303 is for supporting communication between the network device 1300 and other network entities, such as communication with the terminal device.
  • the network device 1300 may further include a storage unit 1301 for storing program codes and data of the network device 1300.
  • the processing unit 1302 may be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication unit 1303 may be a transceiver, a transceiver circuit, or the like.
  • the storage unit 1301 may be a memory.
  • the network device involved in the present application may be the network device shown in FIG.
  • the network device 1400 includes a processor 1402, a transceiver 1403, and a memory 1401.
  • the transceiver 1403, the processor 1402, and the memory 1401 can communicate with each other through an internal connection path to transfer control and/or data signals.
  • the network device 1300 and the network device 1400 provided by the present application may determine the sending manner of the first SI according to the number of the terminal devices that currently request the first SI, for example, broadcast, multicast, or Unicast, therefore, the method for transmitting SI according to the present application helps to improve the efficiency of the terminal device acquiring SI.
  • transceivers may include a transmitter and a receiver.
  • the transceiver may further include an antenna, and the number of antennas may be one or more.
  • the memory can be a separate device or integrated into the processor.
  • the above various devices or parts of the device can be integrated into the chip for implementation, such as integration into a baseband chip.
  • the network device or the terminal device in the device and the method embodiment are completely corresponding, and the corresponding steps are performed by the corresponding module, for example, the sending module method or the step sent by the transmitter performing the method embodiment, and the receiving module or the receiver performing the method embodiment
  • the steps of receiving, except for transmitting and receiving, may be performed by a processing module or processor.
  • a processing module or processor For the function of the specific module, reference may be made to the corresponding method embodiment, which is not described in detail.
  • the embodiment of the present application further provides a communication chip in which an instruction is stored, and when it is run on the terminal device 1100 or the terminal device 1200, the communication chip is caused to execute the method corresponding to the terminal device in the foregoing various implementation manners.
  • the embodiment of the present application further provides a communication chip in which an instruction is stored, and when it runs on the network device 1100 or the network device 1200, the communication chip is caused to execute the method corresponding to the network device in the foregoing various implementation manners.
  • the size of the sequence number of each process does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the present application.
  • the steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware or may be implemented by a processor executing software instructions.
  • the software instructions may be composed of corresponding software modules, which may be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an erasable programmable read only memory ( Erasable programmable ROM (EPROM), electrically erasable programmable read only memory (EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in the terminal device.
  • the processor and the storage medium can also exist as discrete components in the terminal device and the network device.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in or transmitted by a computer readable storage medium.
  • the computer instructions may be from a website site, computer, server or data center via a wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) Another website site, computer, server, or data center for transmission.
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD), or a semiconductor medium (eg, a solid state disk (SSD)). Wait.

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Abstract

本申请提供了一种获取系统信息SI的方法和装置，该方法包括：终端设备向网络设备发送第一消息，所述第一消息包括用于请求获取第一系统信息SI的第一请求信息；所述终端设备检测第二消息并获取所述第一SI，所述第二消息包括用于响应所述请求信息的请求的信息。终端设备可以根据实际需求向网络设备发送第一请求信息，并在预设的时频资源上检测第二消息，网络设备接收到第一请求信息后，可以根据当前请求第一SI的终端设备的数量确定第一SI的发送方式，例如，广播、组播或单播，因此，根据本申请提供的获取SI的方法，有助于提高终端设备获取SI的效率。

Description

获取系统信息的方法和装置
本申请要求于2017年05月05日提交中国专利局、申请号为201710313816.3、申请名称为“获取系统信息的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，尤其涉及无线通信领域中获取系统信息的方法和装置。
背景技术
在无线通信系统中，网络设备需要通过系统信息(system information，SI)将一些关键的参数发送给终端设备，以便于终端设备与网络设备建立通信连接。
例如，在高频通信系统中，由于高频通信的高路损，需采用窄波束来保证信号具有较远的传播距离和较高的波束增益，然而，窄波束覆盖范围有限，为了保证通信质量，网络设备和终端设备需要进行窄波束对准，即，网络设备需要扫描多个波束以确定最终传输数据的窄波束。
因此，如何提高获取SI的效率是当前亟需解决的问题。
发明内容
本申请提供了一种获取SI的方法和装置，有助于提高终端设备获取SI的效率。
一方面，提供了一种获取SI的方法，该方法包括：终端设备向网络设备发送第一消息，所述第一消息包括用于请求获取第一系统信息SI的第一请求信息；所述终端设备检测第二消息并获取所述第一SI，所述第二消息包括用于响应所述请求信息的请求的信息。
终端设备可以根据实际需求向网络设备发送第一请求信息，并在预设的时频资源上检测第二消息，网络设备接收到第一请求信息后，可以根据当前请求第一SI的终端设备的数量确定第一SI的发送方式，例如，广播、组播或单播，因此，根据本申请提供的获取SI的方法，有助于提高终端设备获取SI的效率。
可选地，所述终端设备向网络设备发送第一消息，包括：所述终端设备通过第一码域资源和第一时频资源向所述网络设备发送所述第一消息，其中，所述第一码域资源和所述第一时频资源为物理随机接入信道PRACH资源集合的部分资源，所述第一码域资源和所述第一时频资源满足以下至少一个条件，
所述第一码域资源仅用于与所述第一时频资源共同传输所述第一消息，
所述第一时频资源仅用于与所述第一码域资源共同传输所述第一消息。
通信系统的码域资源和时频资源都是有限的，第一码域资源除了与第一时频资源共同传输第一消息外，可以与PRACH资源集合中剩余的时频资源一起传输其它消息，第一时频除了与第一码域资源共同传输第一消息外，可以与PRACH资源集合中剩余的码域资源 一起传输其它消息，从而在保证获取SI的可靠性的同时，提高了PRACH资源集合的利用率。
可选地，所述第一请求信息包括比特位图，所述比特位图包括的比特位的数量M小于或等于所述终端设备所在的通信系统包括的SI的类型的数量N，所述比特位图用于指示所述第一SI，所述第一SI为所述通信系统包括的SI，所述M和所述N为正整数。
根据本申请提供的获取SI的方法，第一请求信息的大小是固定的，占用的资源的大小也是固定的，有利于网络设备检测到第一请求消息。
可选地，所述终端设备检测第二消息并获取所述第一SI，包括：
所述终端设备从所述第二消息中获取第二SI，所述第二SI属于所述第一SI，或者，所述第二SI包括所述第一SI，其中，
所述第一消息为消息MSG1，所述第二消息为MSG2或所述第一SI对应的SI窗口中的响应消息，或者，
所述第一消息为MSG1，所述第二消息为所述第一SI对应的SI窗口中的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSG4，或者，
所述第一消息为MSG3，所述第二消息为所述第一SI对应的SI窗口中的响应消息。
终端设备发送MSG1后，即可在预设的时段内同时检测响应消息和MSI，或者，同时检测MSG2和MSI；终端设备发送MSG3后，即可在预设的时段内同时检测响应消息和MSI，或者，同时检测MSG4和MSI，从而减少了接收SI的时延。
可选地，所述终端设备检测第二消息并获取所述第一SI，包括：所述终端设备从所述第二消息中获取第二SI，所述第二SI属于所述第一SI，或者，所述第二SI包括所述第一SI，其中，
所述第一消息为消息MSG1，所述第二消息为MSG2或预设时段内的响应消息，或者
所述第一消息为MSG3，所述第二消息为MSG4。
终端设备发送MSG1后，即可在预设的时段内同时检测响应消息和MSI，或者，同时检测MSG2和MSI；终端设备发送MSG3后，即可在预设的时段内同时检测响应消息和MSI，或者，同时检测MSG4和MSI，从而减少了接收SI的时延。
可选地，所述终端设备检测第二消息并获取所述第一SI，包括：所述终端设备从第三消息中获取第三SI，所述第三SI属于所述第一SI，或者，所述第三SI包括所述第一SI，其中，
所述第一消息为MSG1，所述第二消息为MSG2和基本系统信息MSI，所述第三消息为所述终端设备根据所述MSI携带的调度信息接收到的响应消息，或者，
所述第一消息为MSG1，所述第二消息为MSI，所述第三消息为所述终端设备根据所述MSI携带的调度信息接收到的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSG4和MSI，所述第三消息为所述终端设备根据所述MSI携带的调度信息接收到的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSI，所述第三消息为所述终端设备根据所述MSI携带的调度信息接收到的响应消息。
终端设备可能仅从第二消息中获取到部分第一SI，或者未从第二消息中获取到第一 SI，则终端设备可以根据MSI中的调度信息接收响应消息，该响应消息还携带除第一SI之外的其它SI，从而增强了终端设备获取第一SI的灵活性。
可选地，所述第二消息还包括用于指示所述第二SI的类型的信息。
从而，终端设备可以识别出第二消息所携带的信息是否为该终端设备请求的信息。
可选地，还包括：所述终端设备在第一时间单元向所述网络设备重传所述第一消息，其中，所述第二消息检测失败或者所述第二消息未携带用于响应所述请求信息的请求的信息，所述第一时间单元在第二时间单元之后，所述第二时间单元为所述终端设备检测所述第二消息的时间单元。
终端设备在第二时间单元发送MSG1后，若未在预设的时段检测到响应消息、MSG2和MSI，则终端设备可以在第一时间单元重传第一消息；或者，终端设备在第二时间单元发送MSG3后，若未在预设的时段检测到响应消息、MSG4和MSI，则终端设备可以在第一时间单元重传第一消息。其中，第二时间单元和第一时间单元的间隔可以预设，也可以根据网络设备的指示确定，从而增强了获取SI的灵活性和可靠性。
可选地，还包括：所述终端设备从所述网络设备接收退避指示信息和数量指示信息中的至少一种，所述退避指示信息用于指示所述第一时间单元与所述第二时间单元之间的间隔，所述数量指示信息用于指示MSG1的最大传输次数。
网络设备可以指示终端设备获取第一SI的限制条件，即，MSG1的最大传输次数，若终端设备传输MSG1的次数达到了最大传输次数仍未成功获取到第一SI，说明此时通信系统或者通信环境异常，终端设备可以暂停获取第一SI的操作，或者通过其它方式获取第一SI，从而增强了获取SI的灵活性和可靠性，减小了RACH冲突。
可选地，所述退避指示信息和所述数量指示信息中的至少一种承载于MSI中。
MSI通常以广播的形式周期性发送，有利于终端设备及时获取到退避指示信息和数量指示信息中的至少一种。
可选地，还包括：所述终端设备进行小区重选，其中，所述第一消息已被传输的次数等于所述第一消息的最大传输次数。
当终端设备满足获取第一SI的限制条件时，终端设备可以进行小区重传，例如可以根据预设信息重新选择频率优先级较低的小区，以满足用户的基本通信需求。
另一方面，提供了一种发送系统信息的方法，包括：网络设备从终端设备接收第一消息，所述第一消息包括用于请求获取第一系统信息SI的第一请求信息；所述网络设备向所述终端设备发送第二消息，所述第二消息包括用于响应所述请求信息的请求的信息。
终端设备可以根据实际需求向网络设备发送第一请求信息，并在预设的时频资源上检测第二消息，网络设备接收到第一请求信息后，可以根据当前请求第一SI的终端设备的数量确定第一SI的发送方式，例如，广播、组播或单播，因此，根据本申请提供的发送SI的方法，有助于提高终端设备获取SI的效率。
可选地，所述网络设备从终端设备接收第一消息，包括：所述网络设备通过第一码域资源和第一时频资源从所述终端设备接收所述第一消息，其中，所述第一码域资源和所述第一时频资源为物理随机接入信道PRACH资源集合的部分资源，所述第一码域资源和所述第一时频资源满足以下至少一个条件，
所述第一码域资源仅用于与所述第一时频资源共同传输所述第一消息，
所述第一时频资源仅用于与所述第一码域资源共同传输所述第一消息。
PRACH资源集合的码域资源和时频资源都是有限的，第一码域资源除了与第一时频资源共同传输第一消息外，可以与PRACH资源集合中剩余的时频资源一起传输其它消息，第一时频除了与第一码域资源共同传输第一消息外，可以与PRACH资源集合中剩余的码域资源一起传输其它消息，从而在保证获取SI的可靠性的同时，提高了PRACH资源集合的利用率。
可选地，所述第一请求信息包括比特位图，所述比特位图包括的比特位的数量M小于或等于所述终端设备所在的通信系统包括的SI的类型的数量N，所述比特位图用于指示所述第一SI，所述第一SI为所述通信系统包括的SI，所述M和所述N为正整数。
第一请求信息的大小是固定的，占用的资源的大小也是固定的，有利于网络设备检测到第一请求消息。
可选地，所述第二消息包括第二SI，所述第二SI属于所述第一SI，或者，所述第二SI包括所述第一SI，其中，
所述第一消息为消息MSG1，所述第二消息为MSG2或所述第一SI对应的SI窗口中的响应消息，或者，
所述第一消息为MSG1，所述第二消息为所述第一SI对应的SI窗口中的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSG4，或者，
所述第一消息为MSG3，所述第二消息为所述第一SI对应的SI窗口中的响应消息。
可选地，所述第二消息包括第二SI，所述第二SI属于所述第一SI，或者，所述第二SI包括所述第一SI，其中，
所述第一消息为消息MSG1，所述第二消息为MSG2或预设时段内的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSG4。
网络设备可以直接通过第二消息向终端设备发送第一SI的部分或全部内容，网络设备也可以在第二消息中携带除第一SI之外的其它SI，从而增强了终端设备获取第一SI的灵活性。
可选地，还包括：所述网络设备向所述终端设备发送第三消息，所述第三消息包括第三SI，所述第三SI属于所述第一SI，或者，所述第三SI包括所述第一SI，其中，
所述第一消息为MSG1，所述第二消息为MSG2或MSI，所述第三消息为所述MSI携带的调度信息调度的响应消息，或者，
所述第一消息为MSG1，所述第二消息为MSI，所述第三消息为所述MSI携带的调度信息调度的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSG4和MSI，所述第三消息为所述MSI携带的调度信息调度的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSI，所述第三消息为所述MSI携带的调度信息调度的响应消息。
网络设备可以根据实际情况确定第二消息携带的SI，例如，当请求第一SI的终端设备较多时，网络设备可以选择通过MSI调度终端设备接收包括第一SI的广播消息，不通过其它消息发送第一SI；当第一SI的大小较大时，网络设备可以选择在MSG2或MSG4 中携带部分第一SI，剩余的部分第一SI可以通过MSI调度的响应消息发送给终端设备，该响应消息还携带除第一SI之外的其它SI，从而增强了终端设备获取第一SI的灵活性。
可选地，所述第二消息还包括用于指示所述第二SI的类型的信息。
从而，终端设备可以识别出第二消息所携带的信息是否为该终端设备请求的信息。
可选地，还包括：所述网络设备向所述终端设备发送退避指示信息和数量指示信息中的至少一种，所述退避指示信息用于指示所述终端设备重传所述第一消息的时间间隔，所述数量指示信息用于指示MSG1的最大传输次数。
网络设备可以指示终端设备获取第一SI的限制条件，即，MSG1的最大传输次数，若终端设备传输MSG1的次数达到了最大传输次数仍未成功获取到第一SI，说明此时通信系统或者通信环境异常，终端设备可以暂停获取第一SI的操作，或者通过其它方式获取第一SI，从而增强了获取SI的灵活性和可靠性。
可选地，所述退避指示信息和数量指示信息中的至少一种承载于MSI中。
MSI通常以广播的形式周期性发送，有利于终端设备及时获取到退避指示信息和数量指示信息中的至少一种。
再一方面，本申请提供了一种获取SI的装置，该装置可以实现上述方面所涉及方法中终端设备所执行的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的单元或模块。
在一种可能的设计中，该装置的结构中包括处理器和收发器，该处理器被配置为支持该装置执行上述方法中相应的功能。该收发器用于支持该装置与其它网元之间的通信。该装置还可以包括存储器，该存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。
再一方面，本申请提供了一种发送SI的装置，该装置可以实现上述方面所涉及方法中网络设备所执行的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的单元或模块。
在一种可能的设计中，该装置的结构中包括处理器和收发器，该处理器被配置为支持该装置执行上述方法中相应的功能。该收发器用于支持该装置与其它网元之间的通信。该装置还可以包括存储器，该存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。
再一方面，提供了一种网络系统，所述网络系统包括上述各个方面所述的获取SI的装置和发送SI的装置。
再一方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被终端设备的通信单元、处理单元或收发器、处理器运行时，使得终端设备执行上述实现方式中的方法。
再一方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被终端设备的通信单元、处理单元或收发器、处理器运行时，使得网络设备执行上述实现方式中的方法。
再一方面，本申请提供了一种计算机存储介质，用于储存为上述终端设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
再一方面，本申请提供了一种计算机存储介质，用于储存为上述网络设备所用的计算 机软件指令，其包含用于执行上述方面所设计的程序。
再一方面，本申请提供了一种通信芯片，其中存储有指令，当其在终端设备上运行时，使得所述通信芯片执行上述各个方面的方法。
再一方面，本申请提供了一种通信芯片，其中存储有指令，当其在网络设备上运行时，使得所述通信芯片执行上述各个方面的方法。
再一方面，本申请提供了一种获取SI的方法，包括：
一个或多个RACH资源能够被用于SI请求，并且只预留有限的前导序列和有限的RACH资源用于SI请求。预留的前导序列在全部RACH资源上用于SI请求的情况应该被避免。
如果SI请求被发送了但是没有收到网络发送的SI，终端设备进行退避操作后继续检测所请求的SI；
SI请求的退避指示和最大请求数量包括在MSI中。
如果SI请求达到了上述最大请求数量，终端设备将该请求的SI标注为在该小区无法获取并继续驻留在该小区，或者UE触发小区重选的过程。
附图说明
图1是一种适用本申请的通信系统；
图2是本申请提供的一种获取SI的方法的示意图；
图3是本申请提供的一种PRACH资源的示意图；
图4是本申请提供的一种PRACH资源集中映射方式的示意图；
图5是本申请提供的一种PRACH资源离散映射方式的示意图；
图6是本申请提供的一种比特位图的示意图；
图7是本申请提供的另一种获取SI的方法的示意图；
图8是本申请提供的再一种获取SI的方法的示意图；
图9是本申请提供的再一种获取SI的方法的示意图；
图10是本申请提供的一种发送SI的方法的示意图；
图11是本申请提供的一种可能的终端设备的示意图；
图12是本申请提供的另一种可能的终端设备的示意图；
图13是本申请提供的一种可能的网络设备的示意图；
图14是本申请提供的另一种可能的网络设备的示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
图1示出了一种适用本申请的通信系统100。该通信系统100包括网络设备110和终端设备120，网络设备110与终端设备120通过无线网络进行通信，当终端设备120发送数据时，无线通信模块可对信息进行编码以用于传输，具体地，无线通信模块可获取要通过信道发送至网络设备110的一定数目的数据比特，这些数据比特例如是处理模块生成的、从其它设备接收的或者在存储模块中保存的数据比特。这些数据比特可包含在一个或多个传输块(也可称为信息块或数据块)中，传输块可被分段以产生多个编码块。
在本申请中，终端设备可称为接入终端、用户设备(user equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备以及第五代(5th-generation，5G)移动通信系统中的用户设备。
网络设备可以是码分多址(code division multiple access，CDMA)系统中的基站(base transceiver station，BTS)，也可以是宽带码分多址(wideband code division multiple access，WCDMA)系统中的基站(node B，NB)，还可以是长期演进(long term evolution，LTE)系统中的演进型基站(evolutional node B，eNB)，还可以是5G移动通信系统中的基站(gNB)，上述基站仅是举例说明，网络设备还可以为中继站、接入点、车载设备、可穿戴设备以及其它类型的设备。
上述适用本申请的通信系统仅是举例说明，适用本申请的通信系统不限于此，例如，通信系统中包括的网络设备和终端设备的数量还可以是其它的数量。
为了便于理解本申请，在介绍本申请提供的发送反馈信息的方法前，首先对本申请涉及的概念做简要介绍。
通信系统中的SI可以通过系统信息块(system information block，SIB)的方式来组织，每一个SIB集合了某一功能的相关参数，例如，当前通信系统中一共有a，b，c三个SI，基站可以将a组成一个SIB发送给UE，也可以将a和b组成一个SIB发送给UE，还可以将a和b和c组成一个SIB发送给UE。在LTE系统中，SIB包括以下几种：(1)主信息块(master information block，MIB)：UE初始接入网络时所需基本参数；(2)SIB1：小区接入与小区选择相关参数，其它SIB的时域调度信息；(3)SIB2：公共无线资源配置信息；(4)SIB3～SIB8:用来控制同频、频间及不同接入网络制式间(inter random access technologies，Inter-RAT)的小区重选的参数；(5)SIB9：家庭基站名称；(6)SIB10～SIB12：地震海啸预警消息。等等。其中MIB通过物理广播信道(physical broadcast channel，PBCH)承载，传输周期为固定的40毫秒(ms)，SIB1通过物理下行共享信道(physical downlink shared channel，PDSCH)承载，传输周期为固定的80ms，其它SIB则包含在SI消息(SI message)中通过调度传输，每个SI消息可包括一个或多个SIB，SI消息通过PDSCH承载，传输周期可配。
在5G移动通信系统中，为了节省系统资源，部分用于UE接入网络的最基本、最重要的SI被称为基本系统信息(minimum system information，MSI)，MSI通过周期性广播消息发送，剩余的SI则作为其它系统信息(other system information，OSI)按需发送，部分OSI由网络设备触发发送，部分OSI需要UE请求网络设备发送，该部分即按需发送(on-demand)的OSI。
处于连接态的UE可以通过特定的信令(例如，无线资源控制(Radio Resource Control，RRC)信令或控制信令)发送OSI获取请求，处于空闲态(idle)或去激活态(inactive)的UE则需要通过随机接入过程中的消息(message，MSG)1或MSG3发送OSI获取请求。
下面，将详细描述本申请提供的获取SI的方法。
图2示出了本申请提供的一种获取SI的方法的示意图。该方法200包括：
S210，终端设备向网络设备发送第一消息，所述第一消息包括用于请求获取第一系统信息SI的第一请求信息。
S220，所述终端设备检测第二消息并获取所述第一SI，所述第二消息包括用于响应所述请求信息的请求的信息。
为便于理解本申请，以下，以终端设备为UE、网络设备为基站为例对本申请的技术方案进行详细描述。
S210中，第一消息为承载第一请求信息的任意一个消息，本申请对第一消息的名称、发送方式均不作限定。
第一SI为UE所需要的SI，UE可以首先检测MSI，并根据MSI中携带的调度信息判断广播消息里是否携带第一SI，该调度信息用于指示MSI调度了哪些OSI，若UE确定基站未调度第一SI，则UE向基站发送第一请求信息。在一些紧急情况下，例如在超高可靠性与超低时延(ultra reliable&low latency communication，URLLC)场景中，为了尽可能的减小时延，UE也可以不等待基站的广播消息，直接向基站发送第一请求信息。
UE可以根据实际需求向基站发送第一请求信息，并在预设的时频资源上检测第二消息，基站接收到第一请求信息后，可以根据当前请求第一SI的终端设备的数量确定第一SI的发送方式，例如，广播、组播或单播，因此，根据本申请提供的获取SI的方法，有助于提高UE获取SI的效率。
可选地，所述终端设备向网络设备发送第一消息，包括：
S211，所述终端设备通过第一码域资源和第一时频资源向所述网络设备发送所述第一消息，其中，所述第一码域资源和所述第一时频资源为物理随机接入信道(physical random access channel，PRACH)资源集合的部分资源，所述第一码域资源和所述第一时频资源满足以下至少一个条件，
所述第一码域资源仅用于与所述第一时频资源共同传输所述第一消息，
所述第一时频资源仅用于与所述第一码域资源共同传输所述第一消息。
由于系统中设定的前导序列(preamble，即随机接入码域资源)数量是有限的，PRACH时频资源也是有限的，因此，如果一组前导序列在所有的PRACH时频资源上用于发送第一请求信息，那么用于随机接入的前导序列的数量则相应减少，从而导致随机接入(random access channel，RACH)的冲突概率增加，根据本申请提供的获取SI的方法，第一码域资源除了与第一时频资源共同传输第一消息外，可以与PRACH资源集合中剩余的时频资源一起发起RACH，第一时频资源除了与第一码域资源共同传输第一消息外，还可以与PRACH资源集合中剩余的码域资源一起发起RACH，从而在保证获取SI的可靠性的同时，提高了PRACH资源集合的利用率。
图3示出了一种PRACH资源集合。该PRACH资源集合包括多个正交频分复用(orthogonal frequency division multiplexing，OFDM)符号，每个OFDM符号可以通过一个或多个波束接收，其中，PRACH为上行资源，基站通过上行波束扫描的方式接收不同方向上UE发送的MSG1。不同的波束对应不同的天线端口，覆盖整个小区的一轮波束扫描称为PRACH资源集合(PRACH resource set)。
通信协议可以预定义一组前导序列作为传输SI请求的专用前导序列，并选取PRACH资源集合中的部分时频资源作为传输SI请求的专用时频资源，例如，可以是选取该PRACH 资源集合的部分或全部时频资源，其中，SI请求的周期可以是RACH周期的整数倍。该专用前导序列在该专用时频资源用于发送SI获取请求，其它前导序列则可在该专用时频资源发起RACH，所有的前导序列则可在该专用时频资源发起RACH。
图4示出了一种专用前导序列的映射方式的示意图。如图4所示，所有的专用前导序列映射在一块连续的时频资源上，例如，前导序列1至20为专用前导序列，都映射在图4所示的时频资源块上。该映射方式中，对应所有SIB请求或者SI请求的前导序列都在相同的PRACH时频资源上发送，时延较小，但可能会出现由于大量SI请求同时发送导致的冲突。
图5示出了另一种专用前导序列的映射方式的示意图。如图5所示，专用前导序列映射在离散的时频资源上。该映射方式中，则将对应不同SIB请求或者SI请求的前导序列分散映射在不同的PRACH时频资源上，这样避免了大量同时发送的SI请求可能导致的冲突，但对应每个SIB请求或者SI请求的前导序列发送要等待对应的PRACH时频资源，可能会导致SI请求的时延增大。
可选地，所述第一请求信息包括比特位图，所述比特位图包括的比特位的数量M小于或等于所述终端设备所在的通信系统包括的SI的类型的数量N，所述比特位图用于指示所述第一SI，所述第一SI为所述通信系统包括的SI，所述M和所述N为正整数。
第一SI请求信息可以UE和基站约定的信息，例如，比特“10”代表一种SI，比特“01”代表另一种SI。
第一SI请求信息也可以是比特位图(bitmap)的形式，例如，UE所在的通信系统总共有M种SI，则比特位图可以包括N个比特位，该N个比特位对应全部或部分OSI的数量；该比特位图也可以包括M个比特位，该M个比特位对应UE所在通信系统包括的全部SI的类型的数量。
如图6所示，比特位图包括N个比特位，每一个小方块代表一个比特位，每个比特位有“1”和“0”两种状态，且每个比特位对应一个SI，当比特位为“1”时，代表UE请求获取该SI；当比特位为“0”时，代表UE不需要该SI。图6所示的比特位图表示UE请求获取SIBx、SIBy和SIBz。
根据本申请提供的获取SI的方法，第一请求信息的大小是固定的，占用的资源的大小也是固定的，有利于网络设备检测到第一请求消息。
可选地，所述终端设备检测第二消息并获取所述第一SI，包括：
S221，所述终端设备从所述第二消息中获取第二SI，所述第二SI属于所述第一SI，或者，所述第二SI包括所述第一SI，其中，
所述第一消息为消息MSG1，所述第二消息为MSG2或预设时段内的响应消息，或者
所述第一消息为MSG3，所述第二消息为MSG4。
终端设备发送MSG1后，即可在预设的时段内同时检测响应消息和MSI中的调度信息指示的SI窗口中的响应消息，或者，同时检测MSG2和MSI中的调度信息指示的SI窗口中的响应消息；终端设备发送MSG3后，即可在预设的时段内同时检测响应消息和MSI中的调度信息指示的SI窗口中的响应消息，或者，同时检测MSG4和MSI中的调度信息指示的SI窗口中的响应消息，从而减少了接收SI的时延。网络设备可以直接通过第二消息向终端设备发送第一SI的部分或全部内容，网络设备也可以在第二消息中携带除 第一SI之外的其它SI，从而增强了终端设备获取第一SI的灵活性。
例如，UE发送第一消息后，可以在监听响应窗口(即，预设的时段)内的物理下行控制信道(physical downlink control channel，PDCCH)，并期待获取MSI中的调度信息指示的SI窗口中的响应消息。该响应窗口可以是与第一消息占用的时频资源具有预设关系的一段时间，例如，在第一消息发送之后间隔m(m为正整数)个子帧或时隙的一段时间，m的大小以及响应窗口的时间长度均可以是通信协议规定的，也可以是基站配置的。
图7示出了本申请提供的另一种获取SI的方法的示意性流程图。
S710，如果基站(gNB)确定按需发送的OSI对应的某些SIB需要通过MSG1进行请求，则基站会将这些SIB对应的前导序列(即，专用前导序列)和/或PRACH资源集合中的时频资源通过MSI通知UE，其中，每个专用前导序列对应一个或多个OSI对应的SIB。
S720，当UE需要获取某些OSI对应的SIB时，则UE可以首先读取MSI中对OSI的调度信息，并判断该OSI是否正在被广播，若MSI中的调度信息指示该SIB正在广播，则UE直接根据该调度信息读取正在广播的SIB；若该MSI中的调度信息指示该SIB没有正在广播，则UE判断该SIB对应的前导序列和/或PRACH时频资源是否包含在该MSI中。
S730，若该SIB对应的前导序列和/或PRACH时频资源包含在该MSI中，则UE通过该对应的前导序列和/或PRACH时频资源向基站发送第一请求信息，该第一请求信息承载于MSG1中。
S740，UE通过MSG1发送第一请求信息后，需监听相应的响应窗口中的PDCCH并同时根据MSI中的OSI的调度信息，并检测对应SI窗口中携带的所请求的SIB。若基站广播发送第一SI并将该第一SI的调度信息携带在MSI中，则UE根据读取的调度信息在相应的SI窗口检测并读取该第一SI；若基站单播或组播发送该第一SI，则UE在对应的响应窗口检测该第一SI。
S750，基站收到UE发送的第一请求信息后决定是通过广播还是单播还是组播的方式将请求的SI发送给UE。当基站同时收到来自不同方向的多个UE的对第一SI(即，OSI)的请求时，基站可能选择在SI窗口广播发送该第一SI对应的SIB；若基站只收到个别UE发送的对第一SI的请求，则基站可能选择单播或组播的方式发送第一SI对应的SIB。
第一SI可以通过PDSCH承载，由PDCCH调度(指示时频资源位置)，PDCCH可用SI-RNTI加扰，UE则在相应的响应窗口盲检系统信息无线网络临时标识(system information radio network temporary identity，SI-RNTI)加扰的PDCCH，从而获取相应的第一SI。其中，不同的OSI可对应不同的SI-RNTI，以供UE识别请求的OSI；或者，所有OSI对应相同的SI-RNTI，可以在承载第一SI的消息中携带指示该第一SI的类型的信息，即指示第一SI是哪个或哪几个SI，该信息可以是媒体接入控制(media access control，MAC)控制元素(control element，CE)。
图8示出了本申请提供的再一种获取SI的方法的示意性流程图。
图8中，S810至S840与图7中的S710至S740相同，在此不再赘述。
S850中，基站收到UE发送的SI获取请求后决定是通过广播还是单播还是组播的方式将请求的SI发送给UE。当基站同时收到来自不同方向的多个UE的对相同SIB的SI 请求时，基站可能选择在相应的SI窗口中广播发送该SIB，并将该SIB的调度信息携带在MSI中；若基站只收到个别几个UE发送的对同一对相同SIB的SI请求，则基站可能选择单播或组播的方式发送请求的SIB，此时基站可以将SIB直接携带在随机接入响应(random access response，RAR)中发送给UE，也可以将SIB的调度信息携带在RAR中发送给UE，以使UE在响应的时频资源位置上接收请求的SIB，该资源指示信息可包括UE请求的SIB的类型，有效信息(value tag/Index)，周期和SI窗口信息(SI窗口时间长度，资源起始位置等)。基站收到UE发送的SI获取请求后不论是选择广播还是单播还是组播的方式都可以在RAR中携带一个肯定应答(acknowledge，ACK)，指示已成功接收UE的SI请求。则UE通过MSG1发送SI获取请求后，需检测MSI中调度信息指示的SI窗口中携带的所请求的SIB。该过程中RAR可通过5G通信系统中的PDSCH承载，由PDCCH调度，PDCCH可采用与LTE系统相同的方式由随机接入无线网络临时标识(random access radio network temporary identity，RA-RNTI)加扰，与LTE系统中RAR不同的是方法800中RAR包括的消息内容不同，方法800中RAR包括的内容有：前导序列标识(preamble id)，SIB消息，SIB的类型指示(即指示是哪些SIB)，SIB的调度信息，指示已成功接收SI请求的ACK等信息中的至少一种。
可选地，所述终端设备检测第二消息并获取所述第一SI，包括：
S222，所述终端设备从第三消息中获取第三SI，所述第三SI属于所述第一SI，或者，所述第三SI包括所述第一SI，其中，
所述第一消息为MSG1，所述第二消息为MSG2和基本系统信息MSI，所述第三消息为所述终端设备根据所述MSI携带的调度信息接收到的响应消息，或者，
所述第一消息为MSG1，所述第二消息为MSI，所述第三消息为所述终端设备根据所述MSI携带的调度信息接收到的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSG4和MSI，所述第三消息为所述终端设备根据所述MSI携带的调度信息接收到的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSI，所述第三消息为所述终端设备根据所述MSI携带的调度信息接收到的响应消息。
终端设备可能仅从第二消息中获取到部分第一SI，或者未从第二消息中获取到第一SI，则终端设备可以根据MSI中的调度信息接收响应消息，该响应消息还携带除第一SI之外的其它SI，从而增强了终端设备获取第一SI的灵活性。
图9示出了本申请提供的再一种获取SI的方法的示意性流程图。
图9中，S910与图7中的S710相同，在此不再赘述。
S920，若UE请求获取的SIB对应的前导序列(即，专用前导序列)和/或PRACH时频资源(即，专用时频资源)没有包含在MSI中或者UE所请求的SIB对应的前导序列和/或PRACH时频资源没有全部包含在MSI中，则UE选择通过用于随机接入的前导序列和PRACH时频资源上发送MSG1。
S930，UE接收MSG2(RAR)，如果MSG2中包含UE发送的前导序列的标识，则UE认为RAR成功接收。
S940，UE通过MSG3发送SI请求，MSG包含的信息有：UE标识(临时标识)，SI请求(包含请求的SIB类型)，SI请求例如可以是比特位图的形式。
S950，UE通过MSG3发送SI获取请求后，需检测MSI中调度信息指示的SI窗口中携带的所请求的SIB并同时接收MSG4。若基站决定将UE请求的SIB通过组播或单播发送，则将UE请求的SIB通过MSG4发送。有时UE请求的SIB较多，MSG4不能在一个下行传输块中携带所有的SIB，则基站在MSG4中携带用于指示剩余没有发送的SIB需要进一步调度的指示信息，UE收到MSG4中该指示信息后，UE可以在接收完MSG4以后继续检测后续子帧(或时隙)的PDCCH，继续检测PDCCH的时间长度可以是预设的，UE在该时段内接收完剩余的SIB后即可停止接收；若基站决定广播发送UE请求的SIB，UE则根据MSI中的调度信息读取广播的SIB。
可选地，所述第二消息还包括用于指示所述第二SI的类型的信息。
从而，终端设备可以识别出第二消息所携带的信息是否为该终端设备请求的信息。
可选地，方法200还包括：
S230，所述终端设备在第一时间单元向所述网络设备重传所述第一消息，其中，所述第二消息检测失败或者所述第二消息未携带用于响应所述请求信息的请求的信息，所述第一时间单元在第二时间单元之后，所述第二时间单元为所述终端设备检测所述第二消息的时间单元。
UE在第二时间单元发送MSG1后，若未在预设的时段检测到响应消息和MSI，或者，未在预设的时段检测到MSG2和MSI；或者，UE在第二时间单元发送MSG3后，若未在预设的时段检测到响应消息和MSI，或者，未在预设的时段检测到MSG4和MSI，则UE可以在第一时间单元重传第一消息。其中，第二时间单元和第一时间单元的间隔可以预设，也可以根据基站的指示确定，从而增强了获取SI的灵活性和可靠性。
可选地，方法200还包括：
S240，所述终端设备从所述网络设备接收退避(back off)指示信息和数量指示信息中的至少一种，所述退避指示信息用于指示所述第一时间单元与所述第二时间单元之间的间隔，所述数量指示信息用于指示MSG1的最大传输次数。
基站可以指示UE获取第一SI的限制条件，即，MSG1的最大传输次数，若UE传输MSG1的次数达到了最大传输次数仍未成功获取到第一SI，说明此时通信系统或者通信环境异常，终端设备可以暂停获取第一SI的操作，或者通过其它方式获取第一SI，从而增强了获取SI的灵活性和可靠性，减小了RACH冲突。
例如，UE发送MSG1后未在相应的响应窗口检测到请求的SIB，也未在MSI中调度信息指示的SI窗口中读取到请求的SIB，则UE可以执行退避操作，等待退避时间(back off time)后重传MSG1，退避指示信息指示可以为退避时间的编号或序号或索引号，退避指示信息与退避时间的对应关系可以是通信协议预定义的。
SI请求的退避时间可以与RACH的退避时间相同，也可以与RACH的退避时间不同。
通过MSG1请求第一SI的最大次数可以是UE通过相同的上行发送波束请求的最大次数，也可以是UE进行请求的上行发送波束的最大数量。通过MSG1请求第一SI的最大次数需要满足上述两个条件中的至少一个条件。
此外，UE也可以根据预设信息确定退避时间和MSG1的最大传输次数，该预设信息可以是基站配置的，也可以是通信协议预定义的。
可选地，所述退避指示信息和所述数量指示信息中的至少一种承载于MSI中。
MSI通常以广播的形式周期性发送，有利于终端设备及时获取到退避指示信息和数量指示信息中的至少一种。
根据应用场景的不同，退避指示信息和数量指示信息中的至少一种也可以承载在RAR中。
本申请对收退避指示信息和数量指示信息的具体形式以及发送方式均不作限定。
可选地，方法200还包括：
S250，所述终端设备进行小区重选，其中，所述第一消息已被传输的次数等于所述第一消息的最大传输次数。
当终端设备满足获取第一SI的限制条件时，终端设备可以进行小区重传，例如可以根据预设信息重新选择频率优先级较低的小区，以满足用户的基本通信需求。
上文从终端设备的角度介绍了本申请提供的获取SI的方法，下面将结合附图，从网络设备的角度介绍本申请提供的发送SI的方法。
图10是本申请提供的一种发送系统信息的方法的示意性流程图。该方法300包括：
S310，网络设备从终端设备接收第一消息，所述第一消息包括用于请求获取第一系统信息SI的第一请求信息。
S320，所述网络设备向所述终端设备发送第二消息，所述第二消息包括用于响应所述请求信息的请求的信息。
本领域技术人员可以清楚地了解到：在方法300中，网络设备和终端设备均可等同于方法200中的网络设备和终端设备，且网络设备和终端设备的动作与方法200中的接入网设备和终端设备的动作相对应，为了简洁，在此不再赘述。
因此，根据本申请提供的发送SI的方法，终端设备可以根据实际需求向网络设备发送第一请求信息，并在预设的时频资源上检测第二消息，网络设备接收到第一请求信息后，可以根据当前请求第一SI的终端设备的数量确定第一SI的发送方式，例如，广播、组播或单播，因此，根据本申请提供的发送SI的方法，有助于提高终端设备获取SI的效率。
可选地，所述网络设备从终端设备接收第一消息，包括：
S311，所述网络设备通过第一码域资源和第一时频资源从所述终端设备接收所述第一消息，其中，所述第一码域资源和所述第一时频资源为物理随机接入信道PRACH资源集合的部分资源，所述第一码域资源和所述第一时频资源满足以下至少一个条件，
所述第一码域资源仅用于与所述第一时频资源共同传输所述第一消息，
所述第一时频资源仅用于与所述第一码域资源共同传输所述第一消息。
PRACH资源集合的码域资源和时频资源都是有限的，第一码域资源除了与第一时频资源共同传输第一消息外，可以与PRACH资源集合中剩余的时频资源一起传输其它消息，第一时频除了与第一码域资源共同传输第一消息外，可以与PRACH资源集合中剩余的码域资源一起传输其它消息，从而在保证获取SI的可靠性的同时，提高了PRACH资源集合的利用率。
可选地，所述第一请求信息包括比特位图，所述比特位图包括的比特位的数量M小于或等于所述网络设备所在的通信系统包括的SI的类型的数量N，所述比特位图用于指示所述第一SI，所述第一SI为所述通信系统包括的SI，所述M和所述N为正整数。
第一请求信息的大小是固定的，占用的资源的大小也是固定的，有利于网络设备检测 到第一请求消息。
可选地，所述第二消息包括第二SI，所述第二SI属于所述第一SI，或者，所述第二SI包括所述第一SI，其中，
所述第一消息为消息MSG1，所述第二消息为MSG2或预设时段内的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSG4。
网络设备可以直接通过第二消息向终端设备发送第一SI的部分或全部内容，网络设备也可以在第二消息中携带除第一SI之外的其它SI，从而增强了终端设备获取第一SI的灵活性。
可选地，方法300还包括：
S330，所述网络设备向所述终端设备发送第三消息，所述第三消息包括第三SI，所述第三SI属于所述第一SI，或者，所述第三SI包括所述第一SI，其中，
所述第一消息为MSG1，所述第二消息为MSG2或MSI，所述第三消息为所述MSI携带的调度信息调度的响应消息，或者，
所述第一消息为MSG1，所述第二消息为MSI，所述第三消息为所述MSI携带的调度信息调度的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSG4和MSI，所述第三消息为所述MSI携带的调度信息调度的响应消息，或者，
所述第一消息为MSG3，所述第二消息为MSI，所述第三消息为所述MSI携带的调度信息调度的响应消息。
网络设备可以根据实际情况确定第二消息携带的SI，例如，当请求第一SI的终端设备较多时，网络设备可以选择通过MSI调度终端设备接收包括第一SI的广播消息，不通过其它消息发送第一SI；当第一SI的大小较大时，网络设备可以选择在MSG2或MSG4中携带部分第一SI，剩余的部分第一SI可以通过MSI调度的响应消息发送给终端设备，该响应消息还携带除第一SI之外的其它SI，从而增强了终端设备获取第一SI的灵活性。
可选地，所述第二消息还包括用于指示所述第二SI的类型的信息。
从而，终端设备可以识别出第二消息所携带的信息是否为该终端设备请求的信息。
可选地，方法300还包括：
S340，所述网络设备向所述终端设备发送退避指示信息和数量指示信息中的至少一种，所述退避指示信息用于指示所述终端设备重传所述第一消息的时间间隔，所述数量指示信息用于指示MSG1的最大传输次数。
网络设备可以指示终端设备获取第一SI的限制条件，即，MSG1的最大传输次数，若终端设备传输MSG1的次数达到了最大传输次数仍未成功获取到第一SI，说明此时通信系统或者通信环境异常，终端设备可以暂停获取第一SI的操作，或者通过其它方式获取第一SI，从而增强了获取SI的灵活性和可靠性。
可选地，所述退避指示信息和数量指示信息中的至少一种承载于MSI中。
MSI通常以广播的形式周期性发送，有利于终端设备及时获取到退避指示信息和数量指示信息中的至少一种。
上文详细介绍了本申请提供的资源调度的方法示例。可以理解的是，终端设备和网络设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域 技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请可以根据上述方法示例对终端设备等进行功能单元的划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本申请中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用集成的单元的情况下，图11示出了上述实施例中所涉及的终端设备的一种可能的结构示意图。终端设备1100包括：处理单元1102和通信单元1103。处理单元1102用于对终端设备1100的动作进行控制管理，例如，处理单元1102用于支持终端设备1100执行图2的S220和/或用于本文所描述的技术的其它过程。通信单元1103用于支持终端设备1100与其它网络实体的通信，例如与网络设备之间的通信。终端设备1100还可以包括存储单元1101，用于存储终端设备1100的程序代码和数据。
其中，处理单元1102可以是处理器或控制器，例如可以是中央处理器(central processing unit，CPU)，通用处理器，数字信号处理器(digital signal processor，DSP)，专用集成电路(application-specific integrated circuit，ASIC)，现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。通信单元1103可以是收发器、收发电路等。存储单元1101可以是存储器。
当处理单元1102为处理器，通信单元1103为收发器，存储单元1101为存储器时，本申请所涉及的终端设备可以为图12所示的终端设备。
参阅图12所示，该终端设备1200包括：处理器1202、收发器1203、存储器1201。其中，收发器1203、处理器1202以及存储器1201可以通过内部连接通路相互通信，传递控制和/或数据信号。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不加赘述。
本申请提供的终端设备1100和终端设备1200，可以根据实际需求向网络设备发送第一请求信息，并在预设的时频资源上检测第二消息，网络设备接收到第一请求信息后，可以根据当前请求第一SI的终端设备的数量确定第一SI的发送方式，例如，广播、组播或单播，从而有助于提高终端设备获取SI的效率。
在采用集成的单元的情况下，图13示出了上述实施例中所涉及的网络设备的一种可能的结构示意图。网络设备1300包括：处理单元1302和通信单元1303。处理单元1302用于对网络设备1300的动作进行控制管理，例如，处理单元1302用于支持网络设备1300通过通信单元1303执行图10的S310和/或用于本文所描述的技术的其它过程。通信单元 1303用于支持网络设备1300与其它网络实体的通信，例如与终端设备之间的通信。网络设备1300还可以包括存储单元1301，用于存储网络设备1300的程序代码和数据。
其中，处理单元1302可以是处理器或控制器，例如可以是CPU，通用处理器，DSP，ASIC，FPGA或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。通信单元1303可以是收发器、收发电路等。存储单元1301可以是存储器。
当处理单元1302为处理器，通信单元1303为收发器，存储单元1301为存储器时，本申请所涉及的网络设备可以为图14所示的网络设备。
参阅图14所示，该网络设备1400包括：处理器1402、收发器1403、存储器1401。其中，收发器1403、处理器1402以及存储器1401可以通过内部连接通路相互通信，传递控制和/或数据信号。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不加赘述。
本申请提供的数据传输的网络设备1300和网络设备1400，接收到第一请求信息后，可以根据当前请求第一SI的终端设备的数量确定第一SI的发送方式，例如，广播、组播或单播，因此，根据本申请提供的发送SI的方法，有助于提高终端设备获取SI的效率。
应理解，上述收发器可以包括发射机和接收机。收发器还可以进一步包括天线，天线的数量可以为一个或多个。存储器可以是一个单独的器件，也可以集成在处理器中。上述的各个器件或部分器件可以集成到芯片中实现，如集成到基带芯片中实现。
装置和方法实施例中的网络设备或终端设备完全对应，由相应的模块执行相应的步骤，例如发送模块方法或发射器执行方法实施例中发送的步骤，接收模块或接收器执行方法实施例中接收的步骤，除发送接收外的其它步骤可以由处理模块或处理器执行。具体模块的功能可以参考相应的方法实施例，不再详述。
本申请实施例还提供了一种通信芯片，其中存储有指令，当其在终端设备1100或终端设备1200上运行时，使得所述通信芯片执行上述各种实现方式中终端设备对应的方法。
本申请实施例还提供了一种通信芯片，其中存储有指令，当其在网络设备1100或网络设备1200上运行时，使得所述通信芯片执行上述各种实现方式中网络设备对应的方法。
在本申请各个实施例中，各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请的实施过程构成任何限定。
另外，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(random access memory，RAM)、闪存、只读存储器(read only memory，ROM)、可擦除可编程只读存储器(erasable programmable ROM，EPROM)、电可擦可编程只读存储器(electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储 介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于终端设备中。当然，处理器和存储介质也可以作为分立组件存在于终端设备和网络设备中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者通过所述计算机可读存储介质进行传输。所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，数字通用光盘(digital versatile disc，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请的具体实施方式而已，并不用于限定本申请的保护范围，凡在本申请的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请的保护范围之内。

Claims (24)

  1. 一种获取系统信息的方法，其特征在于，包括：
    终端设备向网络设备发送第一消息，所述第一消息包括用于请求获取第一系统信息SI的第一请求信息；
    所述终端设备检测第二消息并获取所述第一SI，所述第二消息包括用于响应所述请求信息的请求的信息。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备向网络设备发送第一消息，包括：
    所述终端设备通过第一码域资源和第一时频资源向所述网络设备发送所述第一消息，其中，所述第一码域资源和所述第一时频资源为物理随机接入信道PRACH资源集合的部分资源，所述第一码域资源和所述第一时频资源满足以下至少一个条件，
    所述第一码域资源仅用于与所述第一时频资源共同传输所述第一消息，
    所述第一时频资源仅用于与所述第一码域资源共同传输所述第一消息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一请求信息包括比特位图，所述比特位图包括的比特位的数量M小于或等于所述终端设备所在的通信系统包括的SI的类型的数量N，所述比特位图用于指示所述第一SI，所述第一SI为所述通信系统包括的SI，所述M和所述N为正整数。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述终端设备检测第二消息并获取所述第一SI，包括：
    所述终端设备从所述第二消息中获取第二SI，所述第二SI属于所述第一SI，或者，所述第二SI包括所述第一SI，其中，
    所述第一消息为消息MSG1，所述第二消息为MSG2或所述第一SI对应的SI窗口中的响应消息，或者，
    所述第一消息为MSG1，所述第二消息为所述第一SI对应的SI窗口中的响应消息，或者，
    所述第一消息为MSG3，所述第二消息为MSG4，或者，
    所述第一消息为MSG3，所述第二消息为所述第一SI对应的SI窗口中的响应消息。
  5. 根据权利要求4所述的方法，其特征在于，所述第二消息还包括用于指示所述第二SI的类型的信息。
  6. 根据权利要求1至3中任一项所述的方法，其特征在于，还包括：
    所述终端设备在第一时间单元向所述网络设备重传所述第一消息，其中，所述第二消息检测失败或者所述第二消息未携带用于响应所述请求信息的请求的信息，所述第一时间单元在第二时间单元之后，所述第二时间单元为所述终端设备检测所述第二消息的时间单元。
  7. 根据权利要求6所述的方法，其特征在于，还包括：
    所述终端设备从所述网络设备接收退避指示信息和数量指示信息中的至少一种，所述退避指示信息用于指示所述第一时间单元与所述第二时间单元之间的间隔，所述数量指示 信息用于指示MSG1的最大传输次数。
  8. 根据权利要求7所述的方法，其特征在于，所述退避指示信息和所述数量指示信息中的至少一种承载于MSI中。
  9. 根据权利要求1、2、3、6、7、8中任一项所述的方法，其特征在于，还包括：
    所述终端设备进行小区重选，其中，所述第一消息已被传输的次数等于所述第一消息的最大传输次数。
  10. 一种发送系统信息的方法，其特征在于，包括：
    网络设备从终端设备接收第一消息，所述第一消息包括用于请求获取第一系统信息SI的第一请求信息；
    所述网络设备向所述终端设备发送第二消息，所述第二消息包括用于响应所述请求信息的请求的信息。
  11. 根据权利要求10所述的方法，其特征在于，所述网络设备从终端设备接收第一消息，包括：
    所述网络设备通过第一码域资源和第一时频资源从所述终端设备接收所述第一消息，其中，所述第一码域资源和所述第一时频资源为物理随机接入信道PRACH资源集合的部分资源，所述第一码域资源和所述第一时频资源满足以下至少一个条件，
    所述第一码域资源仅用于与所述第一时频资源共同传输所述第一消息，
    所述第一时频资源仅用于与所述第一码域资源共同传输所述第一消息。
  12. 根据权利要求10或11所述的方法，其特征在于，所述第一请求信息包括比特位图，所述比特位图包括的比特位的数量M小于或等于所述网络设备所在的通信系统包括的SI的类型的数量N，所述比特位图用于指示所述第一SI，所述第一SI为所述通信系统包括的SI，所述M和所述N为正整数。
  13. 根据权利要求10至12中任一项所述的方法，其特征在于，所述第二消息包括第二SI，所述第二SI属于所述第一SI，或者，所述第二SI包括所述第一SI，其中，
    所述第一消息为消息MSG1，所述第二消息为MSG2或所述第一SI对应的SI窗口中的响应消息，或者，
    所述第一消息为MSG1，所述第二消息为所述第一SI对应的SI窗口中的响应消息，或者，
    所述第一消息为MSG3，所述第二消息为MSG4，或者，
    所述第一消息为MSG3，所述第二消息为所述第一SI对应的SI窗口中的响应消息。
  14. 根据权利要求13所述的方法，其特征在于，所述第二消息还包括用于指示所述第二SI的类型的信息。
  15. 一种获取系统信息的装置，其特征在于，包括处理单元和通信单元，
    所述通信单元用于向网络设备发送第一消息，所述第一消息包括用于请求获取第一系统信息SI的第一请求信息；
    所述处理单元用于通过所述通信单元检测第二消息并获取所述第一SI，所述第二消息包括用于响应所述请求信息的请求的信息。
  16. 根据权利要求15所述的装置，其特征在于，所述通信单元具体用于：
    通过第一码域资源和第一时频资源向所述网络设备发送所述第一消息，其中，所述第 一码域资源和所述第一时频资源为物理随机接入信道PRACH资源集合的部分资源，所述第一码域资源和所述第一时频资源满足以下至少一个条件，
    所述第一码域资源仅用于与所述第一时频资源共同传输所述第一消息，
    所述第一时频资源仅用于与所述第一码域资源共同传输所述第一消息。
  17. 根据权利要求15或16所述的装置，其特征在于，所述第一请求信息包括比特位图，所述比特位图包括的比特位的数量M小于或等于所述装置所在的通信系统包括的SI的类型的数量N，所述比特位图用于指示所述第一SI，所述第一SI为所述通信系统包括的SI，所述M和所述N为正整数。
  18. 根据权利要求15至17中任一项所述的装置，其特征在于，所述处理单元具体用于：
    从所述第二消息中获取第二SI，所述第二SI属于所述第一SI，或者，所述第二SI包括所述第一SI，其中，
    所述第一消息为消息MSG1，所述第二消息为MSG2或所述第一SI对应的SI窗口中的响应消息，或者，
    所述第一消息为MSG1，所述第二消息为所述第一SI对应的SI窗口中的响应消息，或者，
    所述第一消息为MSG3，所述第二消息为MSG4，或者，
    所述第一消息为MSG3，所述第二消息为所述第一SI对应的SI窗口中的响应消息。
  19. 根据权利要求18所述的装置，其特征在于，所述第二消息还包括用于指示所述第二SI的类型的信息。
  20. 根据权利要求15至17中任一项所述的装置，其特征在于，所述通信单元还用于：
    在第一时间单元向所述网络设备重传所述第一消息，其中，所述第二消息检测失败或者所述第二消息未携带用于响应所述请求信息的请求的信息，所述第一时间单元在第二时间单元之后，所述第二时间单元为所述处理单元检测所述第二消息的时间单元。
  21. 一种发送系统信息的装置，其特征在于，包括处理单元和通信单元，
    所述处理单元用于通过所述通信单元从终端设备接收第一消息，所述第一消息包括用于请求获取第一系统信息SI的第一请求信息；以及用于通过所述通信单元向所述终端设备发送第二消息，所述第二消息包括用于响应所述请求信息的请求的信息。
  22. 根据权利要求21所述的装置，其特征在于，所述通信单元具体用于：
    通过第一码域资源和第一时频资源从所述终端设备接收所述第一消息，其中，所述第一码域资源和所述第一时频资源为物理随机接入信道PRACH资源集合的部分资源，所述第一码域资源和所述第一时频资源满足以下至少一个条件，
    所述第一码域资源仅用于与所述第一时频资源共同传输所述第一消息，
    所述第一时频资源仅用于与所述第一码域资源共同传输所述第一消息。
  23. 根据权利要求21或22所述的装置，其特征在于，所述第一请求信息包括比特位图，所述比特位图包括的比特位的数量M小于或等于所述装置所在的通信系统包括的SI的类型的数量N，所述比特位图用于指示所述第一SI，所述第一SI为所述通信系统包括的SI，所述M和所述N为正整数。
  24. 根据权利要求21至23中任一项所述的装置，其特征在于，所述第二消息包括第 二SI，所述第二SI属于所述第一SI，或者，所述第二SI包括所述第一SI，其中，
    所述第一消息为消息MSG1，所述第二消息为MSG2或所述第一SI对应的SI窗口中的响应消息，或者，
    所述第一消息为MSG1，所述第二消息为所述第一SI对应的SI窗口中的响应消息，或者，
    所述第一消息为MSG3，所述第二消息为MSG4，或者，
    所述第一消息为MSG3，所述第二消息为所述第一SI对应的SI窗口中的响应消息。
PCT/CN2018/085535 2017-05-05 2018-05-04 获取系统信息的方法和装置 WO2018202112A1 (zh)

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