WO2019192492A1 - 一种请求系统信息的指示方法、相关设备及系统 - Google Patents

一种请求系统信息的指示方法、相关设备及系统 Download PDF

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Publication number
WO2019192492A1
WO2019192492A1 PCT/CN2019/081062 CN2019081062W WO2019192492A1 WO 2019192492 A1 WO2019192492 A1 WO 2019192492A1 CN 2019081062 W CN2019081062 W CN 2019081062W WO 2019192492 A1 WO2019192492 A1 WO 2019192492A1
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WIPO (PCT)
Prior art keywords
network device
system information
message
mac
value
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PCT/CN2019/081062
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English (en)
French (fr)
Inventor
徐海博
姚楚婷
邝奕如
王键
刘海涛
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华为技术有限公司
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Publication of WO2019192492A1 publication Critical patent/WO2019192492A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0033Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • H04W74/004Transmission of channel access control information in the uplink, i.e. towards network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/11Allocation or use of connection identifiers

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, a related device, and a system for indicating system information.
  • an effective method is to deploy a relay node.
  • the UE is connected to the base station through the relay node.
  • the base station to which the relay node is connected may become the donor base station (Donor base station), and the host base station may be connected to the core network.
  • SI System Information
  • MIB Master Information Block
  • System Information Block System Information Block
  • the broadcast period of the basic information system basic configuration information and the partial system information block information is fixed, and the broadcast period of the remaining part of the system information block information is adjustable within a fixed range. Even if the user equipment does not currently need to acquire system information, it must still listen to the broadcast content in the broadcast channel to obtain the two pieces of information.
  • the CU-DU separation technology is introduced, that is, the base station of the NR is logically divided into two nodes, a gNB-DU (Distributed Unit) and a gNB-CU (Central Unit).
  • a system in which a UE is connected to a gNB-CU through a gNB-DU and is connected to a core network through a gNB-CU is referred to as a CU-DU separation system
  • a system in which the UE is connected to the base station through a relay node and connected to the core network through the base station is called
  • the relay system for the CU-DU separation system or the relay system, when the user equipment needs to request the system information, there is a system information request message that cannot accurately identify the system information request message sent by the user equipment, and erroneously rejects the user equipment, and is transmitted System information request messages contain unnecessary information and waste resources.
  • the embodiment provides an indication method, a related device and a system for requesting system information, which can accurately identify a system information request message, and avoid erroneous rejection of system information requests and transmission resources of the user equipment.
  • an embodiment of the present invention provides a method for acquiring system information, where the method is applied to a CU-DU separation system or a relay system, and the method includes:
  • the terminal device sends a media access control sub-protocol data unit MAC sub-PDU to the network device, where the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates that the MAC SDU includes a request System information message;
  • the terminal device acquires system information sent by the network device.
  • the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, so that the network device can be according to the first
  • the indication information identifies the message that the MAC SDU transmits to request the system information, which can effectively prevent the network device from erroneously rejecting the system information request of the terminal device, and can also avoid waste of transmission resources.
  • the first indication information includes a value of a logical channel identifier LCID in a MAC sub-head included in the MAC subPDU, where a value of the LCID is used to include indicating that the MAC SDU transmission is A message requesting system information.
  • the message requesting system information includes: a radio resource control protocol RRC message transmitted through a common control logical channel CCCH, or a radio resource control protocol RRC message transmitted through a dedicated control logical channel DCCH.
  • the embodiment of the present invention can transmit a message requesting system information by using an RRC message transmitted by the CCCH or an RRC message transmitted by the DCCH, so as to facilitate network device identification.
  • the value of the LCID indicates that the MAC SDU transmits an RRC message requesting system information transmitted through the CCCH or DCCH.
  • the value of the LCID may be preset to indicate that the MAC SDU transmits an RRC message requesting system information transmitted through the CCCH or DCCH, and only needs to identify the value of the LCID, which is simple. Efficient.
  • the method before the sending, by the terminal device, the MAC sub PDU to the network device, the method further includes:
  • the terminal device receives the second indication information that is sent by the network device, where the second indication information is used to indicate that the network device supports the terminal device to use the first value of the LCID.
  • the second indication information may be used to notify the terminal device that the value of the LCID can be used as the first indication information, and the network device can identify the value of the LCID, thereby identifying the message requesting the system information.
  • the second indication information is included in the main system information MIB broadcast by the network device, or is included in the system information block 1SIB1 broadcast by the network device.
  • the second indication information may be sent by using the MIB or the SIB1.
  • the MIB or the SIB1 is an existing message format, and the second indication information is not sent by other messages, which is simple and convenient, and saves resources.
  • the first indication information includes a value of a reserved bit in a MAC subhead included in the MAC subPDU, where the value of the reserved bit indicates that the MAC SDU transmits a requesting system. Information message.
  • the value of the reserved bit may be preset to indicate that the MAC SDU transmits a message requesting system information, and only needs to identify the value of the reserved bit, which is simple and efficient.
  • the message requesting system information includes: a radio resource control protocol RRC message transmitted through a common control logical channel CCCH, or a radio resource control protocol RRC message transmitted through a dedicated control logical channel DCCH.
  • the embodiment of the present invention can transmit a message requesting system information by using an RRC message transmitted by the CCCH or an RRC message transmitted by the DCCH, so as to facilitate network device identification.
  • the MAC SDU corresponding to the MAC sub-header when the value of the reserved bit is a first value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC message requesting system information that is transmitted through a CCCH or a DCCH;
  • the MAC SDU corresponding to the MAC sub-header is transmitted by the RRC connection setup request message transmitted through the CCCH or the DCCH, or the RRC connection re-establishment request message, or the RRC connection recovery message.
  • the value of the reserved bit may be preset to indicate that the MAC SDU corresponding to the MAC sub-head transmits an RRC message requesting system information transmitted through the CCCH or the DCCH, and only needs to be reserved.
  • the value of the bit is identified, which is simple and efficient.
  • an embodiment of the present invention provides a method for requesting system information, where the method is applied to a CU-DU separation system or a relay system, and the method includes:
  • the first network device receives a media access control sub-protocol data unit MAC sub-PDU sent by the terminal device, where the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates the MAC
  • the SDU includes a message requesting system information
  • the first network device sends system information to the terminal device.
  • the first indication information and the media access control service data unit MAC SDU sent by the received terminal device may be used to identify, by using the first indication information, that the MAC SDU is transmitted for requesting system information.
  • the message can effectively prevent the first network device from erroneously rejecting the system information request of the terminal device, and can also avoid waste of transmission resources.
  • the first indication information includes a value of a logical channel identifier LCID in a MAC sub-head included in the MAC subPDU, where a value of the LCID is used to include indicating that the MAC SDU transmission is A message requesting system information.
  • the first indication information is formed by setting the value of the LCID, which is simple to implement, convenient for network identification, and efficient and reliable.
  • the message requesting system information includes: a radio resource control protocol RRC message transmitted through a common control logical channel CCCH, or a radio resource control protocol RRC message transmitted through a dedicated control logical channel DCCH.
  • the embodiment of the present invention can transmit a message requesting system information by using an RRC message transmitted by the CCCH or an RRC message transmitted by the DCCH, so as to facilitate network device identification.
  • the value of the LCID indicates that the MAC SDU transmits an RRC message requesting system information transmitted through the CCCH or DCCH.
  • the value of the LCID may be preset to indicate that the MAC SDU transmits an RRC message requesting system information transmitted through the CCCH or DCCH, and only needs to identify the value of the LCID, which is simple. Efficient.
  • the method before the first network device receives the MAC subPDU sent by the terminal device, the method further includes:
  • the first network device sends the second indication information to the terminal device, where the second indication information is used to indicate that the first network device supports the terminal device to use the first value of the LCID.
  • the second indication information may be used to notify the terminal device that the value of the LCID can be used as the first indication information, and the network device can identify the value of the LCID, thereby identifying the message requesting the system information.
  • the second indication information is included in the main system information MIB broadcast by the network device, or is included in the system information block 1SIB1 broadcast by the network device.
  • the second indication information may be sent by using the MIB or the SIB1.
  • the MIB or the SIB1 is an existing message format, and the second indication information is not sent by other messages, which is simple and convenient, and saves resources.
  • the first indication information includes a value of a reserved bit in a MAC subhead included in the MAC subPDU, where the value of the reserved bit indicates that the MAC SDU transmits a requesting system. Information message.
  • the value of the reserved bit may be preset to indicate that the MAC SDU transmits a message requesting system information, and only needs to identify the value of the reserved bit, which is simple and efficient.
  • the message requesting system information includes: a radio resource control protocol RRC message transmitted through a common control logical channel CCCH, or a radio resource control protocol RRC message transmitted through a dedicated control logical channel DCCH.
  • the embodiment of the present invention can transmit a message requesting system information by using an RRC message transmitted by the CCCH or an RRC message transmitted by the DCCH, so as to facilitate network device identification.
  • the value of the reserved bit is a first value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC message requesting system information transmitted through a CCCH or a DCCH;
  • the value of the reserved bit is a second value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC connection setup request message transmitted through CCCH or DCCH, or an RRC connection re-establishment request message, or an RRC connection recovery. Message.
  • the value of the reserved bit may be preset to indicate that the MAC SDU corresponding to the MAC sub-head transmits an RRC message requesting system information transmitted through the CCCH or the DCCH, and only needs to be reserved.
  • the value of the bit is identified, which is simple and efficient.
  • an embodiment of the present invention provides a method for requesting system information, where the method is applied to a CU-DU separation system or a relay system, where the method includes:
  • the first network device Receiving, by the first network device, a request message sent by the first network device, where the request message is sent by the first network device after the MAC sub PDU is used to request system information according to the first indication information, where the MAC address is sent by the first network device.
  • the sub-PDU is sent to the first network device by the terminal device, where the MAC subPDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates that the MAC SDU includes requesting system information.
  • the second network device sends a response message to the first network device according to the request message, so that the first network device sends system information to the terminal device.
  • the embodiment of the present invention can effectively prevent the erroneous rejection of the system information request of the terminal device by receiving the request message sent by the first network device after the message that the MAC SDU includes the system information is requested according to the first indication information. It also avoids wasting transmission resources.
  • an embodiment of the present invention provides a method for requesting system information, where the method is applied to a CU-DU separation system or a relay system, where the method includes:
  • the terminal device selects a PRACH resource from the first physical random access channel (PRACH) resource set to send a random access preamble to the network device; the first PRACH resource set is used when the user equipment initiates a random access procedure to request system information. Sending a set of PRACH resources used by the random access preamble;
  • PRACH physical random access channel
  • the terminal device receives first system information sent by the network device.
  • the embodiment of the present invention may be configured to: according to the random access preamble sent by the received terminal device from the PRACH resource selected by the first PRACH resource set, identify that the MAC subPDU sent by the terminal device transmits the message requesting the first system information, It can effectively avoid the network device erroneously rejecting the system information request of the terminal device, and can also avoid the waste of transmission resources.
  • the method further includes:
  • the terminal device receives the second system information that is sent by the network device, and the second system information includes the first PRACH resource set, before sending the random access preamble.
  • the random access preamble sent by the PRACH resource selected from the first PRACH resource set is received by the network device to facilitate the network device to identify, by receiving, in advance, the second system information that is sent by the network device and includes the first PRACH resource set. Reliable and improved the accuracy of recognition.
  • the method further includes:
  • the second system information is a primary system information MIB broadcast by the network device, or a system information block 1SIB1 broadcast by the network device.
  • the second system information is transmitted through the main system information MIB or the system information block 1SIB1, and the second system information does not need to be transmitted through other forms of information, thereby saving transmission resources.
  • an embodiment of the present invention provides a method for transmitting a system information request message and a response message, where the method includes:
  • the first network device sends a first message to the second network device;
  • the first message includes a system information request message and a cell identifier;
  • the cell identifier is an identifier of a cell corresponding to the system information request message;
  • the cell identifier The corresponding cell belongs to the third network device;
  • the second message sent by the second network device; the second message instructing the third network device to send system information of a cell corresponding to the system information request message;
  • the message includes the cell identifier;
  • the first network device and the third network device are the same network device, or the first network device and the third network device are different network devices.
  • the embodiment of the present invention can ensure that the first message is correctly transmitted to the second network device, and can also ensure that the second message sent by the second network device is correctly received.
  • the second network device maintains a first information set, where the first information set includes an identifier of a cell directly managed by the second network device, and a first association table, where An association table includes a device identifier of the fourth network device and an identifier of the cell managed by the fourth network device, where the fourth network device is a child node device of the second network device; the fourth network device The identifier of the managed cell includes an identifier of a cell directly managed by the fourth network device and an identifier of a cell indirectly managed by the fourth network device;
  • the first network device maintains a second information set, where the second information set includes an identifier of a cell directly managed by the first network device, and a second association table, where the first association table includes a fifth network device. And the identifier of the cell managed by the fifth network device, where the fifth network device is a child node device of the first network device; and the identifier of the cell managed by the fifth network device includes the The identifier of the cell directly managed by the network device and the identifier of the cell indirectly managed by the fifth network device.
  • the embodiment of the present invention implements the accuracy of message transmission by using the identifier of the cell and the first association table, and the identifier of the cell and the second association table.
  • the first message includes a device identifier of the third network device
  • the second message includes a device identifier of the third network device
  • the second network device maintains a third information set, where the third information set includes a device identifier of the sixth network device and a third association table, where the third association table includes a device identifier of the sixth network device and a device identifier of a seventh network device having a connection relationship with the sixth network device; wherein the sixth network device is a child node device of the second network device, and the connection relationship includes the seventh network device Directly connected to the sixth network device, or the seventh network device is indirectly connected to the sixth network device;
  • the first network device maintains a fourth information set, where the fourth information set includes a device identifier of the eighth network device and a fourth association table, where the fourth association table includes a device identifier of the eighth network device a device identifier of a ninth network device having a connection relationship with the eighth network device; wherein the eighth network device is a child node device of the first network device, and the connection relationship includes the ninth network device Directly connected to the eighth network device, or the ninth network device is indirectly connected to the eighth network device.
  • the embodiment of the present invention implements the accuracy of message transmission by using the device identifier of the network device and the third association table, and the device identifier of the network device and the fourth association table.
  • the second message includes a device identifier of the third network device
  • the second network device maintains a fifth information set and a sixth information set
  • the fifth information set includes an identifier of a cell directly managed by the second network device, and a fifth association table, where the fifth association table includes a device identifier of the tenth network device and an identifier of a cell directly managed by the tenth network device
  • the tenth network device has a connection relationship with the second network device, and the connection relationship includes that the tenth network device is directly connected to the second network device, or the tenth network device and the Indirectly connecting the second network device;
  • the sixth information set includes a device identifier of the eleventh network device and a sixth association table, where the sixth association table includes a device identifier of the eleventh network device and a connection relationship with the eleventh network device The device identifier of the twelfth network device; wherein the eleventh network device is a child node device of the second network device, and the connection relationship includes the twelfth network device and the eleventh network The device is directly connected, or the twelfth network device is indirectly connected to the eleventh network device;
  • the first network device maintains a seventh information set, where the seventh information set includes a device identifier seventh association table of the thirteenth network device, and the seventh association table includes a device identifier of the thirteenth network device And a device identifier of the fourteenth network device having a connection relationship with the thirteenth network device; wherein the thirteenth network device is a child node device of the first network device, and the connection relationship includes the The fourteenth network device is directly connected to the thirteenth network device, or the fourteenth network device is indirectly connected to the thirteenth network device.
  • the embodiment of the present invention implements the accuracy of message transmission by using the identifier of the cell and the fifth association table, the device identifier of the network device and the sixth association table, and the device identifier of the network device and the seventh association table.
  • an embodiment of the present invention provides a method for transmitting a system information request message and a response message, where the method includes:
  • the second network device Receiving, by the second network device, the first message sent by the first network device, where the first message includes a system information request message and a cell identifier; the cell identifier is an identifier of a cell corresponding to the system information request message; The cell corresponding to the identifier belongs to the third network device;
  • the second network device sends a second message to the first network device, where the second message indicates that the third network device sends system information of a cell corresponding to the system information request message; the second message
  • the cell identifier is included in the
  • the first network device and the third network device are the same network device, or the first network device and the third network device are different network devices.
  • the embodiment of the present invention can ensure that the first message sent by the first network device is correctly received, and the second message can be correctly transmitted to the first network device.
  • an embodiment of the present invention provides a terminal device, where the terminal device includes:
  • a first sending unit configured to send a media access control sub-protocol data unit MAC subPDU to the network device
  • the MAC subPDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates that the MAC SDU includes a message requesting system information;
  • the first receiving unit is configured to receive system information sent by the network device.
  • the first indication information includes a value of a logical channel identifier LCID in a MAC sub-head included in the MAC subPDU, where a value of the LCID is used to include indicating that the MAC SDU transmission is A message requesting system information.
  • the message requesting system information includes: a radio resource control protocol RRC message transmitted through a common control logical channel CCCH, or a radio resource control protocol RRC message transmitted through a dedicated control logical channel DCCH.
  • the value of the LCID indicates that the MAC SDU transmits an RRC message requesting system information transmitted through the CCCH or DCCH.
  • the terminal device before the terminal device sends the MAC subPDU to the network device,
  • the first receiving unit is further configured to receive the second indication information that is sent by the network device, where the second indication information is used to indicate that the network device supports the terminal device to use the first value of the LCID.
  • the second indication information is included in the main system information MIB broadcast by the network device, or is included in the system information block 1SIB1 broadcast by the network device.
  • the first indication information includes a value of a reserved bit in a MAC subhead included in the MAC subPDU, where the value of the reserved bit indicates that the MAC SDU transmits a requesting system. Information message.
  • the value of the reserved bit is a first value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC message requesting system information transmitted through a CCCH or a DCCH;
  • the value of the reserved bit is a second value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC connection setup request message transmitted through CCCH or DCCH, or an RRC connection re-establishment request message, or an RRC connection recovery. Message.
  • an embodiment of the present invention provides a terminal device, where the terminal device includes:
  • a first selecting unit configured to select a PRACH resource from a first physical random access channel PRACH resource set
  • the first PRACH resource set is used to send a set of PRACH resources used by the random access preamble when the user equipment initiates a random access procedure to request system information.
  • a second sending unit configured to send a random access preamble to the network device
  • the second sending unit is further configured to send, to the network device, a media access control sub-protocol data unit, a MAC sub-PDU, where the MAC sub-PDU transmits a message requesting the first system information;
  • the second receiving unit is configured to receive first system information that is sent by the network device.
  • the second receiving unit before the sending, by the terminal device, the second receiving unit, the second receiving unit is further configured to receive second system information that is sent by the network device, where the second system information is The first PRACH resource set is included in the set.
  • the second system information is a primary system information MIB broadcast by the network device, or a system information block 1SIB1 broadcast by the network device.
  • a ninth aspect, the embodiment of the present invention provides a first network device, where the first network device includes:
  • a first receiving unit configured to receive a media access control sub-protocol data unit MAC subPDU sent by the terminal device
  • the MAC subPDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates that the MAC SDU includes a message requesting system information;
  • a first sending unit configured to send a request message to the second network device, where the request message includes the message requesting system information
  • the first receiving unit is further configured to receive a response message sent by the second network device
  • the first sending unit is further configured to send system information to the terminal device.
  • the first indication information includes a value of a logical channel identifier LCID in a MAC sub-head included in the MAC subPDU, where a value of the LCID is used to include indicating that the MAC SDU transmission is A message requesting system information.
  • the message requesting system information includes: a radio resource control protocol RRC message transmitted through a common control logical channel CCCH, or a radio resource control protocol RRC message transmitted through a dedicated control logical channel DCCH.
  • the value of the LCID indicates that the MAC SDU transmits an RRC message requesting system information transmitted through the CCCH or DCCH.
  • the first sending unit is further configured to send the second indication information to the terminal device, where the second indication information is used to indicate that the first network device supports the terminal device to use the first value of the LCID.
  • the second indication information is included in the main system information MIB broadcast by the network device, or is included in the system information block 1SIB1 broadcast by the network device.
  • the first indication information includes a value of a reserved bit in a MAC subhead included in the MAC subPDU, where the value of the reserved bit indicates that the MAC SDU transmits a requesting system. Information message.
  • the value of the reserved bit is a first value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC message requesting system information transmitted through a CCCH or a DCCH;
  • the value of the reserved bit is a second value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC connection setup request message transmitted through CCCH or DCCH, or an RRC connection re-establishment request message, or an RRC connection recovery. Message.
  • the tenth aspect of the present invention provides a second network device, where the second network device includes:
  • a second receiving unit configured to receive a request message sent by the first network device
  • the request message is a message that is sent by the first network device after the MAC sub PDU is used to request system information according to the first indication information, where the MAC subPDU is sent by the terminal device to the first network device.
  • the MAC subPDU includes first indication information and a medium access control service data unit MAC SDU, where the first indication information indicates that the MAC SDU includes a message requesting system information;
  • a second sending unit configured to send a response message to the first network device, to enable the first network device to send system information to the terminal device.
  • an embodiment of the present invention provides a first network device, where the first network device includes:
  • a first sending unit configured to send a first message to the second network device
  • the first message includes a system information request message and a cell identifier, where the cell identifier is an identifier of a cell corresponding to the system information request message, and the cell corresponding to the cell identifier belongs to a third network device;
  • a first receiving unit configured to receive a second message sent by the second network device
  • the second message indicates that the third network device sends the system information of the cell corresponding to the system information request message, and the second message includes the cell identifier.
  • the first network device further includes a first maintenance unit, where the first maintenance unit is configured to maintain a second information set, where the second information set includes the first network device directly An identifier of the managed cell and a second association table, where the first association table includes a device identifier of the fifth network device and an identifier of the cell managed by the fifth network device, where the fifth network device is the a sub-node device of the network device; the identifier of the cell managed by the fifth network device includes an identifier of a cell directly managed by the fifth network device and an identifier of a cell indirectly managed by the fifth network device.
  • the first maintenance unit is further configured to maintain a fourth information set, where the fourth information set includes a device identifier of the eighth network device and a fourth association table, where the fourth association table
  • the device identifier of the ninth network device and the device identifier of the ninth network device having a connection relationship with the eighth network device, where the eighth network device is a child node device of the first network device,
  • the connection relationship includes that the ninth network device is directly connected to the eighth network device, or the ninth network device is indirectly connected to the eighth network device.
  • the first maintenance unit is further configured to maintain a seventh information set, where the seventh information set includes a device identifier seventh association table of the thirteenth network device, and the seventh association table a device identifier including the thirteenth network device and a device identifier of a fourteenth network device having a connection relationship with the thirteenth network device; wherein the thirteenth network device is the first network device The child node device, the connection relationship includes that the fourteenth network device is directly connected to the thirteenth network device, or the fourteenth network device is indirectly connected to the thirteenth network device.
  • the embodiment of the present invention provides a second network device, where the second network device includes:
  • a second receiving unit configured to receive a first message sent by the first network device
  • the first message includes a system information request message and a cell identifier, where the cell identifier is an identifier of a cell corresponding to the system information request message, and the cell corresponding to the cell identifier belongs to a third network device;
  • a second sending unit configured to send a second message to the first network device
  • the second message indicates that the third network device sends the system information of the cell corresponding to the system information request message, and the second message includes the cell identifier.
  • the second network further includes a second maintenance unit, where the second maintenance unit is configured to maintain a first information set, where the first information set includes direct management by the second network device.
  • the identifier of the cell and the first association table where the first association table includes the device identifier of the fourth network device and the identifier of the cell managed by the fourth network device, where the fourth network device is the second a child node device of the network device; the identifier of the cell managed by the fourth network device includes an identifier of a cell directly managed by the fourth network device and an identifier of a cell indirectly managed by the fourth network device.
  • the second maintenance unit is further configured to maintain a third information set, where the third information set includes a device identifier of the sixth network device and a third association table, where the third association table The device identifier of the sixth network device and the device identifier of the seventh network device having a connection relationship with the sixth network device; wherein the sixth network device is a child node device of the second network device,
  • the connection relationship includes that the seventh network device is directly connected to the sixth network device, or the seventh network device is indirectly connected to the sixth network device.
  • the second maintenance unit is further configured to maintain a fifth information set and a sixth information set
  • the fifth information set includes an identifier of a cell directly managed by the second network device, and a fifth association table, where the fifth association table includes a device identifier of the tenth network device and an identifier of a cell directly managed by the tenth network device
  • the tenth network device has a connection relationship with the second network device, and the connection relationship includes that the tenth network device is directly connected to the second network device, or the tenth network device and the Indirectly connecting the second network device;
  • the sixth information set includes a device identifier of the eleventh network device and a sixth association table, where the sixth association table includes a device identifier of the eleventh network device and a connection relationship with the eleventh network device The device identifier of the twelfth network device; wherein the eleventh network device is a child node device of the second network device, and the connection relationship includes the twelfth network device and the eleventh network The device is directly connected, or the twelfth network device is indirectly connected to the eleventh network device.
  • the embodiment of the present invention provides a terminal device, where the terminal device includes: a processor, a memory, and a transceiver, where:
  • the processor, the memory and the transceiver are interconnected, the memory is for storing a computer program, the computer program comprising program instructions, the processor being configured to invoke the program instructions, performing the following steps :
  • MAC sub-PDU Transmitting, to the network device, a media access control sub-protocol data unit MAC sub-PDU, where the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates that the MAC SDU includes requesting system information News
  • the embodiment of the present invention provides a terminal device, where the terminal device includes: a processor, a memory, and a transceiver, where:
  • the processor, the memory and the transceiver are interconnected, the memory is for storing a computer program, the computer program comprising program instructions, the processor being configured to invoke the program instructions, performing the following steps :
  • the first PRACH resource set is used to send a random when the user equipment initiates a random access procedure to request system information.
  • the embodiment of the present invention provides a first network device, where the first network device includes: a processor, a memory, and a transceiver, where:
  • the processor, the memory and the transceiver are interconnected, the memory is for storing a computer program, the computer program comprising program instructions, the processor being configured to invoke the program instructions, performing the following steps :
  • MAC sub-PDU Receiving a media access control sub-protocol data unit MAC sub-PDU sent by the terminal device, where the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates that the MAC SDU includes a requesting system Information message
  • the embodiment of the present invention provides a second network device, where the second network device includes: a processor, a memory, and a transceiver, where:
  • the processor, the memory and the transceiver are interconnected, the memory is for storing a computer program, the computer program comprising program instructions, the processor being configured to invoke the program instructions, performing the following steps :
  • the MAC subPDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates that the MAC SDU includes a message requesting system information;
  • the embodiment of the present invention provides a first network device, where the first network device includes: a processor, a memory, and a transceiver, where:
  • the processor, the memory and the transceiver are interconnected, the memory is for storing a computer program, the computer program comprising program instructions, the processor being configured to invoke the program instructions, performing the following steps :
  • the first message includes a system information request message and a cell identifier;
  • the cell identifier is an identifier of a cell corresponding to the system information request message; and the cell corresponding to the cell identifier Belongs to the third network device;
  • the embodiment of the present invention provides a second network device, where the second network device includes: a processor, a memory, and a transceiver, where:
  • the processor, the memory and the transceiver are interconnected, the memory is for storing a computer program, the computer program comprising program instructions, the processor being configured to invoke the program instructions, performing the following steps :
  • the cell identifier is an identifier of a cell corresponding to the system information request message;
  • the cell belongs to the third network device;
  • a nineteenth aspect the embodiment of the present invention provides a communication system, including a terminal device, a first network device, and a second network device; the first network device is the seventh aspect or the eighth aspect, or the seventh aspect or The terminal device described in any one of the optional implementations of the eighth aspect, wherein the first network device is the ninth aspect, or the first network device described in any one of the optional implementation manners of the ninth aspect, The second network device is the first network device described in the tenth aspect, or any one of the optional implementations of the tenth aspect.
  • the embodiment of the present invention provides a communication system, including a first network device and a second network device; the first network device is the eleventh aspect, or any one of the eleventh The terminal device described in the implementation manner, wherein the second network device is the twelfth aspect, or the second network device described in any one of the optional implementations of the twelfth aspect.
  • an embodiment of the present invention provides a computer readable storage medium, where the computer readable storage medium stores a computer program, where the computer program includes program instructions, and the program instructions are processed by a terminal device.
  • the processor of the terminal device When executed, the processor of the terminal device is caused to perform the method described in the above first aspect or any one of the optional implementations of the first aspect; or the program instruction when executed by a processor of the first network device Enabling the processor of the first network device to perform the method described in the second aspect or any one of the alternative implementations of the second aspect, or the program instruction, when executed by a processor of the second network device,
  • the processor of the second network device is caused to perform the method described in the third aspect or any one of the alternative implementations of the third aspect.
  • an embodiment of the present invention provides a computer readable storage medium, where the computer readable storage medium stores a computer program, where the computer program includes program instructions, when the program instructions are used by the first network device Executing, by the processor of the first network device, the method described in any one of the alternative aspects of the fifth aspect or the fifth aspect, or the program instruction is used by the second network device
  • the processor of the second network device when executed by the processor, performs the method described in the sixth aspect or any one of the alternative implementations of the sixth aspect.
  • the value of the LCID or the value of the reserved bit is set as the first indication information in the sent MAC subPDU, so that the first network device can identify the MAC SDU transmission according to the first indication information.
  • the message requesting the system information can effectively prevent the network device from erroneously rejecting the system information request of the terminal device, and can also avoid the waste of the transmission resource.
  • the first message sent by the first network device and the second network device are sent. Adding a cell identifier or a device identifier to the second message, where the first network device and the second network device can ensure the first message or the second by maintaining the cell identifier and the association table, or the information identifier of the device identifier and the association table. The message is correctly transmitted between the first network device and the second network device.
  • FIG. 1 is a schematic flowchart of a terminal device requesting system information from a network
  • FIG. 2 is a schematic diagram of a system architecture of a 5G access network in the case of CU-DU separation;
  • FIG. 3 is a schematic flowchart of requesting system information by a user equipment based on a CU-DU separation system
  • FIG. 4 is a schematic diagram of a control plane protocol stack of a CU-DU separation system
  • 5A is a schematic diagram of a single-hop relay architecture
  • 5B is a schematic diagram of a multi-hop relay architecture
  • FIG. 6 is a schematic flowchart of a method for indicating requesting system information according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a MAC PDU according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of an LCID value and indication information according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart diagram of a method for indicating requesting system information according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic flowchart of a method for indicating requesting system information according to an embodiment of the present disclosure
  • FIG. 11 is a schematic flowchart of a method for transmitting a system information request message and a response message according to an embodiment of the present disclosure
  • FIG. 12 is a schematic diagram of a routing system according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of another routing system according to an embodiment of the present invention.
  • FIG. 14 is a schematic diagram of another routing system according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic flowchart of a method for transmitting a system information request message and a response message according to an embodiment of the present disclosure
  • FIG. 16 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 17 is a schematic structural diagram of another terminal device according to an embodiment of the present disclosure.
  • FIG. 18 is a schematic structural diagram of a first network device according to an embodiment of the present disclosure.
  • FIG. 19 is a schematic structural diagram of a second network device according to an embodiment of the present disclosure.
  • FIG. 20 is a schematic structural diagram of another first network device according to an embodiment of the present disclosure.
  • FIG. 21 is a schematic structural diagram of another second network device according to an embodiment of the present disclosure.
  • FIG. 22 is a schematic structural diagram of another terminal device according to an embodiment of the present disclosure.
  • FIG. 23 is a schematic structural diagram of another terminal device according to an embodiment of the present disclosure.
  • FIG. 24 is a schematic structural diagram of another first network device according to an embodiment of the present disclosure.
  • FIG. 25 is a schematic structural diagram of another second network device according to an embodiment of the present disclosure.
  • FIG. 26 is a schematic structural diagram of another first network device according to an embodiment of the present disclosure.
  • FIG. 27 is a schematic structural diagram of another second network device according to an embodiment of the present invention.
  • MSI Minimum System Information
  • FIG. 1 is a schematic diagram of a process for a terminal device to request system information from a network. As shown in FIG.
  • a terminal device sends a random access preamble based on a physical random access channel (PRACH) to notify the network that it will Sending a request for obtaining system information on demand, after receiving the random access response sent by the network, the terminal device sends a system information request, and after receiving the system information request, responding to the system information request, the network is reserved
  • PRACH physical random access channel
  • the base station (gNB) of the NR is logically divided into two nodes, a gNB-CU (Central Unit) and a gNB-DU (Distributed Unit), and one gNB may have one CU and one or more DUs.
  • FIG. 2 it is a system architecture diagram of a 5G access network in the case of CU-DU separation.
  • the interface between the CU and the DU is an F1 interface, and the gNB passes a User to Network interface Universal (Uu). It is connected to the User Equipment (UE) and connected to the 5G core network through Next Generation (NG).
  • Uu User to Network interface Universal
  • UE User Equipment
  • NG Next Generation
  • the network includes a CU-DU separated base station, and the UE needs to acquire the system information that needs to be acquired by the CU, and then sends the system information to the CU.
  • the UE requests the system information
  • the UE needs to send the system information request to the CU through the DU.
  • the message is then broadcast through the DU to obtain system information.
  • FIG. 3 it is a schematic flowchart of user equipment requesting system information based on a CU-DU separation system.
  • the CU of the base station sends the system information of the cell to the DU, and the DU receives and stores the data.
  • the user equipment triggers the system information request, and sends a random access preamble to the DU of the base station.
  • the DU After receiving the preamble, the DU sends a random access response, and the UE receives the random access response. After the response, the system information request message is sent. After receiving the system information request message, the DU sends a system information request message to the CU through an F1 Application Protocol (F1-AP) message, and the CU passes the interpretation.
  • F1-AP F1 Application Protocol
  • the F1AP message sends a system information transfer command message to the DU, and the DU broadcasts the system information to the UE after receiving the system information transfer command message.
  • the control plane protocol stack of the system based on the CU-DU separation shown in FIG. 2 is as shown in FIG. 4, and it can be seen that the DU has no Packet Data Convergence Protocol (PDCP) and a Radio Resource Control protocol (Radio Resource Control). , RRC) and Non-Access Stratum (NAS), only physical layer protocol (Physical, PHY), Medium Access Control (MAC), Radio Link Control (Radio Link Control) , RLC), Internet Protocol (IP), Stream Control Transmission Protocol (SCTP), and F1-Application Protocol (F1-AP).
  • PDCP Packet Data Convergence Protocol
  • RRC Radio Resource Control protocol
  • NAS Non-Access Stratum
  • the message of the requesting system information sent by the UE is an RRC message. Since the DU does not have a Radio Resource Control (RRC), the RRC message cannot be decoded.
  • RRC Radio Resource Control
  • the DU can only forward the RRC message through an F1AP message according to the F1 application protocol.
  • the CU has a Radio Resource Control (RRC), which can decode the RRC message, and after decoding the RRC message requesting the system information, send the system information transmission command message through an F1AP message according to the F1 application protocol.
  • RRC Radio Resource Control
  • the DU is notified to broadcast system information.
  • the RRC message when transmitting the system information request message, may be transmitted through a Common Control Channel (CCCH) in the logical channel.
  • CCCH Common Control Channel
  • the CCCH is also used to transmit the RRC connection establishment request, the RRC connection recovery request, the RRC connection reestablishment request and other RRC messages.
  • the DU can only identify the CCCH transmission sent by the UE according to the Medium Access Control (MAC).
  • MAC Medium Access Control
  • the RRC message cannot decode the RRC message, the content of the RRC message cannot be known, the messages cannot be treated differently, and the RRC message is forwarded to the CU only through the same message.
  • the indication information needs to be added in the RRC message of the request system information sent by the UE, so that the DU can correctly recognize that the RRC message sent by the UE is used to request system information.
  • an effective method is to deploy a relay node between the UE and the base station.
  • the UE In the system architecture in which the relay node is deployed, the UE is connected to the base station through the relay node.
  • FIG. 5A is a schematic diagram of a single-hop relay architecture
  • FIG. 5B is a schematic diagram of a multi-hop relay architecture.
  • the relay node is similar to the DU. There is no Radio Resource Control (RRC), and the RRC message sent by the UE cannot be decoded.
  • the relay node can forward the RRC message to the host base station through an F1AP message according to the F1 application protocol.
  • the host base station has a Radio Resource Control (RRC), which is capable of decoding the RRC message, and after decoding the RRC message requesting the system information, sends a system information transmission command message to the F1AP message according to the F1 application protocol.
  • RRC Radio Resource Control
  • the relay node notifies the relay node to broadcast system information.
  • a UE is connected to a gNB-CU through a gNB-DU and connected to a core network through a gNB-CU (CU-DU separation system), or the UE is connected to the base station through a relay node, and is connected to the core through the base station.
  • the system of the network (the relay system) needs to add the indication information to the RRC message of the system information that is sent by the UE, so that the DU or the relay node can correctly identify that the RRC message sent by the UE is used to request system information. Therefore, the DU or the relay node is prevented from erroneously rejecting the UE requesting the system information and causing waste of the transmission resource.
  • FIG. 6 is a schematic flowchart of a method for indicating requesting system information according to an embodiment of the present disclosure, where the method includes but is not limited to the following steps:
  • the terminal device sends a media access control sub-protocol data unit MAC sub-PDU to the network device, where the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates the MAC SDU Includes messages requesting system information.
  • the terminal device is applied to a CU-DU separation system or a relay system
  • the network device includes a base station distribution unit DU
  • the network device includes a relay node
  • the terminal device may be a user equipment UE, and the UE sends a MAC sub PDU to the DU or the relay node of the base station, and the DU or the relay node identifies, according to the first indication information included in the MAC subPDU, the request information of the MAC SDU transmission. Message.
  • the UE before transmitting the MAC sub-PDU to the DU or the relay node, the UE sends the preamble to the DU or the relay node, and the DU or the relay node sends the random connection to the UE after receiving the preamble sent by the UE. In response, provide an upstream authorization. Based on the uplink grant, the UE sends a MAC PDU including the MAC sub PDU to the DU or the relay node.
  • the first indication information includes a value of a logical channel identifier LCID in a MAC sub-head included in the MAC subPDU, where the value of the LCID is used to include the requesting system information indicating that the MAC SDU transmission is Message.
  • the UE may transmit a Radio Resource Control Protocol (RRC) message carrying the request system information through the common control logical channel CCCH.
  • RRC Radio Resource Control Protocol
  • the format of the medium access control protocol data unit MAC PDU is as shown in FIG. 7.
  • One MAC PDU includes one or more MAC subPDUs, and the MAC subPDU has three types: a MAC sub PDU that transmits a MAC SDU, and a transmission medium connection.
  • the MAC sub PDU of the Control Layer Protocol Control Signaling (MAC CE) and the MAC sub PDU of the additional padding are examples of the MAC CE.
  • Each of the MAC sub-PDUs that transmit the MAC SDU and the MAC CE includes a subheader, where the LCID field in the sub-header is used to indicate the logical channel where the MAC SDU corresponding to the sub-header is located, or the sub-header is also used to indicate The type of corresponding MAC CE.
  • the value of the logical channel identifier LCID in the MAC sub-header can be set as the indication information, and the DU or the relay node can determine according to the value of the LCID in the MAC sub-header.
  • the MAC SDU corresponding to the MAC sub-head transmits a message requesting system information.
  • the DU or the relay node cannot decode the RRC message transmitted by the MAC SDU even without the RRC layer protocol, but can still determine the MAC SDU transmission by interpreting the value of the logical channel identifier LCID in the MAC sub-head included in the MAC subPDU. It is a message requesting system information, which effectively avoids the DU or the relay node erroneously rejecting the terminal device.
  • the message requesting system information includes: a Radio Resource Control Protocol RRC message transmitted over a common control logical channel CCCH, or a Radio Resource Control Protocol RRC message transmitted over a dedicated control logical channel DCCH.
  • the value of the LCID when the value of the LCID is the first value, the value of the LCID indicates that the MAC SDU transmits an RRC message requesting system information transmitted through the CCCH or DCCH.
  • the LCID includes 6 bits.
  • the value of the LCID is a value between 10001 and 110110, it is not currently defined, and is a reserved value.
  • the LCID can be set to 10001 to 110110.
  • a certain value, for example, 110011 is used as the first value, indicating that the MAC SDU corresponding to the value of the set LCID transmits an RRC message requesting system information transmitted through the CCCH or DCCH. It can be understood that other values can also be set for indication.
  • the MAC SDU corresponding to the MAC sub-head corresponding to the MAC sub-header is transmitted by using an RRC connection setup request message transmitted by the CCCH, and the value of the LCID is the third value.
  • a value indicating that the MAC SDU included in the MAC sub-PDU corresponding to the MAC sub-header is an RRC connection re-establishment request message transmitted by using a CCCH and when the value of the LCID is a fourth value, indicating the MAC sub-header
  • the corresponding MAC SDUs included in the MAC subPDU are transmitted by the CCCH, and the second value, the third value, and the fourth value of the LCID may be the same value, or may be Different values.
  • the DU or the relay node can determine whether the MAC SDU transmission is the requesting system only after determining whether the value of the LCID in the MAC sub-head included in the MAC sub-PDU is the first value.
  • the message of the information if the value of the LCID is the first value, it can be determined that the MAC SDU transmits the message requesting the system information, and the whole process is simple to implement.
  • the method before the terminal device sends the MAC subPDU to the network device, the method further includes:
  • the terminal device receives the second indication information that is sent by the network device, where the second indication information is used to indicate that the network device supports the terminal device to use the first value of the LCID.
  • the network device does not identify the value of the LCID, that is, the terminal device cannot use the first value of the LCID to indicate that the MAC SDU transmits the message requesting the system information, the terminal device sends the MAC subPDU including the first value of the LCID. It also makes no sense that the network device is still unable to determine that the MAC SDU is transmitting a message requesting system information. Therefore, the network device needs to send an indication information in advance to inform the terminal device that the first value of the LCID can be used.
  • the second indication information is included in the main system information MIB broadcast by the network device or included in the system information block 1SIB1 broadcast by the network device.
  • the MIB and the SIB1 are information that the network device must broadcast, and the terminal device must also listen.
  • the terminal device can ensure that the second indication information is reliably received.
  • the first indication information includes a value of a reserved bit in a MAC subhead included in the MAC subPDU, where the value of the reserved bit indicates that the MAC SDU transmits a message requesting system information.
  • the DU or the relay node may interpret the subheader information corresponding to the MAC subPDU, the value of R can be set as Instructing information, the DU or the relay node may determine, based on the value of R, that the MAC SDU transmits a message requesting system information.
  • the DU or the relay node cannot decode the RRC message transmitted by the MAC SDU even without the RRC layer protocol, but can still determine the MAC SDU transmission by interpreting the value of the reserved bit R in the MAC sub-head included in the MAC subPDU. It is a message requesting system information, which effectively avoids the DU or the relay node erroneously rejecting the terminal device.
  • the message requesting system information includes: a Radio Resource Control Protocol RRC message transmitted over a common control logical channel CCCH, or a Radio Resource Control Protocol RRC message transmitted over a dedicated control logical channel DCCH.
  • the value of the reserved bit is a first value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC message requesting system information transmitted through a CCCH or a DCCH;
  • the value of the reserved bit is a second value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC connection setup request message transmitted through CCCH or DCCH, or an RRC connection re-establishment request message, or an RRC connection recovery. Message.
  • the MAC SDU sent by the terminal device is an RRC message requesting system information
  • the terminal device sets the value of the reserved bit R in the MAC sub-head corresponding to the MAC SDU to a first value
  • the MAC SDU sent by the terminal device is an RRC.
  • the terminal device sets the value of the reserved bit R in the MAC sub-head corresponding to the MAC SDU to a second value, where the first value
  • the value and the value of the second value may be 0 or 1, that is, when the first value is 1, the second value is 0, or when the first value is 0, the second value is 1, and of course other values may be There are no restrictions here.
  • the DU or the relay node can determine whether the MAC SDU transmission is the requesting system only after determining whether the value of the R in the MAC sub-head included in the MAC sub-PDU is the first value.
  • the message of the information if the value of R is the first value, it can be determined that the MAC SDU transmits the message requesting the system information, and the whole process is simple and reliable.
  • S102 The terminal device receives system information sent by the network device.
  • the terminal device before receiving the system information sent by the network device, the terminal device receives scheduling information of the system information sent by the network device, and the terminal device may receive the main system information MIB or system information broadcast by the network device.
  • the block 1SIB1 acquires scheduling information of the system information from the MIB or the SIB1, and the terminal device receives the system information at a preset time according to the scheduling, thereby acquiring system information broadcast by the network device.
  • the terminal device can be discontinuously received, and the receiving efficiency of the terminal device is improved.
  • FIG. 9 is a schematic flowchart of a method for indicating system information requesting according to an embodiment of the present disclosure, where the method includes but is not limited to the following steps:
  • the first network device receives a media access control sub-protocol data unit MAC sub-PDU sent by the terminal device, where the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates The MAC SDU includes a message requesting system information.
  • the first network device may be a DU of the base station or a relay node
  • the user equipment may be a UE
  • the UE sends a MAC sub PDU to the DU or the relay node of the base station, and the DU or the relay node according to the first indication included in the MAC subPDU
  • the information identifies the message transmitted by the MAC SDU as requesting system information.
  • the UE before transmitting the MAC sub-PDU to the DU or the relay node, the UE sends the preamble to the DU or the relay node, and the DU or the relay node sends the random connection to the UE after receiving the preamble sent by the UE. In response, provide an upstream authorization. Based on the uplink grant, the UE sends a MAC PDU including the MAC sub PDU to the DU or the relay node.
  • the first indication information includes a value of a logical channel identifier LCID in a MAC sub-head included in the MAC subPDU, where the value of the LCID is used to include the requesting system information indicating that the MAC SDU transmission is Message.
  • the value of the logical channel identifier LCID in the MAC sub-header can be set as the indication information, and the DU or the relay node can determine according to the value of the LCID in the MAC sub-header.
  • the MAC SDU corresponding to the MAC sub-head transmits a message requesting system information.
  • the DU or the relay node cannot decode the RRC message transmitted by the MAC SDU even without the RRC layer protocol, but can still determine the MAC SDU transmission by interpreting the value of the logical channel identifier LCID in the MAC sub-head included in the MAC subPDU. It is a message requesting system information, which effectively avoids the DU or the relay node erroneously rejecting the terminal device.
  • the message requesting system information includes: a Radio Resource Control Protocol RRC message transmitted over a common control logical channel CCCH, or a Radio Resource Control Protocol RRC message transmitted over a dedicated control logical channel DCCH.
  • the value of the LCID when the value of the LCID is the first value, the value of the LCID indicates that the MAC SDU transmits an RRC message requesting system information transmitted through the CCCH or DCCH.
  • the DU or the relay node can determine whether the MAC SDU transmission is the requesting system only after determining whether the value of the LCID in the MAC sub-head included in the MAC sub-PDU is the first value.
  • the message of the information if the value of the LCID is the first value, it can be determined that the MAC SDU transmits the message requesting the system information, and the whole process is simple to implement.
  • the method before the first network device receives the MAC subPDU sent by the terminal device, the method further includes:
  • the first network device sends the second indication information to the terminal device, where the second indication information is used to indicate that the first network device supports the terminal device to use the first value of the LCID.
  • the terminal device sends the first value including the LCID.
  • the MAC sub PDU also has no meaning, and the first network device is still unable to determine that the MAC SDU transmits a message requesting system information. Therefore, the first network device needs to send an indication information in advance to notify the terminal device that the first value of the LCID can be used.
  • the second indication information is included in the primary system information MIB broadcast by the first network device, or included in the system information block 1SIB1 broadcast by the first network device.
  • the MIB and the SIB1 are information that the network device must broadcast, and the terminal device must also listen.
  • the terminal device can ensure that the second indication information is reliably received.
  • the first indication information includes a value of a reserved bit in a MAC subhead included in the MAC subPDU, where the value of the reserved bit indicates that the MAC SDU transmits a message requesting system information.
  • the DU or the relay node may interpret the subheader information corresponding to the MAC subPDU, the value of R can be set as Instructing information, the DU or the relay node may determine, based on the value of R, that the MAC SDU transmits a message requesting system information.
  • the DU or the relay node cannot decode the RRC message transmitted by the MAC SDU even without the RRC layer protocol, but can still determine the MAC SDU transmission by interpreting the value of the reserved bit R in the MAC sub-head included in the MAC subPDU. It is a message requesting system information, which effectively avoids the DU or the relay node erroneously rejecting the terminal device.
  • the message requesting system information includes: a Radio Resource Control Protocol RRC message transmitted over a common control logical channel CCCH, or a Radio Resource Control Protocol RRC message transmitted over a dedicated control logical channel DCCH.
  • the value of the reserved bit is a first value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC message requesting system information transmitted through a CCCH or a DCCH;
  • the value of the reserved bit is a second value, indicating that the MAC SDU corresponding to the MAC sub-head transmits an RRC connection setup request message transmitted through CCCH or DCCH, or an RRC connection re-establishment request message, or an RRC connection recovery. Message.
  • the MAC SDU sent by the terminal device is an RRC message requesting system information
  • the terminal device sets the value of the reserved bit R in the MAC sub-head corresponding to the MAC SDU to a first value
  • the MAC SDU sent by the terminal device is an RRC.
  • the terminal device sets the value of the reserved bit R in the MAC sub-head corresponding to the MAC SDU to a second value, where the first value
  • the value and the value of the second value may be 0 or 1, that is, when the first value is 1, the second value is 0, or when the first value is 0, the second value is 1, and of course other values may be There are no restrictions here.
  • the DU or the relay node can determine whether the MAC SDU transmission is the requesting system only after determining whether the value of the R in the MAC sub-head included in the MAC sub-PDU is the first value.
  • the message of the information if the value of R is the first value, it can be determined that the MAC SDU transmits the message requesting the system information, and the whole process is simple and reliable.
  • the first network device sends a message to the second network device, where the message includes the message requesting system information.
  • the DU transmits an RRC message requesting system information to the CU, or one relay node transmits an RRC message requesting system information to another relay node, or one relay node transmits an RRC message requesting system information to the host base station. Both are transmitted through an F1AP message.
  • an F1AP message is defined, the F1AP message being dedicated to transmitting an RRC message requesting system information.
  • the F1AP message includes: a message type of the F1AP message; a cell ID (Cell ID) of the cell that the UE requests system information, the cell ID is a unique identifier of the cell in the global scope; and a container containing an RRC message requesting system information.
  • the existing F1AP message is multiplexed, and when the F1AP message is transmitted, an RRC message requesting system information is included, where the F1AP message includes only: a message type of the F1AP message; and a cell that the UE requests system information.
  • a cell identifier (Cell ID)
  • the cell ID is a unique identifier of the cell in the global scope
  • a container containing an RRC message requesting system information optionally, the method further includes: indicating that the message is transmitted in the message requesting system information The indication information of the RRC message.
  • S203 The first network device sends system information to the terminal device.
  • the first network device after receiving the response message sent by the second network device, the first network device sends the system information to the terminal device, where the response message includes a system information transmission command, and the second network device also passes an F1AP message. Sending the response message to the first network device.
  • the first network device before the first network device sends the system information to the terminal device, the first network device sends scheduling information to the terminal device, and the terminal device may receive the primary system information MIB broadcast by the first network device. Or the system information block 1SIB1, the scheduling information is obtained from the MIB or the SIB1, and the terminal device monitors the broadcast channel in the preset time period according to the scheduling information, and acquires system information broadcast by the first network device.
  • the system information block 1SIB1 the scheduling information is obtained from the MIB or the SIB1
  • the terminal device monitors the broadcast channel in the preset time period according to the scheduling information, and acquires system information broadcast by the first network device.
  • the first network device sends the scheduling information, so that the terminal device listens to the broadcast channel in a preset time period, and acquires system information broadcasted by the network device, so that the terminal device can be discontinuously received, and the receiving efficiency of the terminal device is improved.
  • FIG. 10 is a schematic flowchart of a method for indicating system information requesting according to an embodiment of the present disclosure, where the method includes but is not limited to the following steps:
  • the terminal device selects a PRACH resource from the first physical random access channel (PRACH) resource set to send a random access preamble to the network device, where the first PRACH resource set is used by the user equipment to initiate a random access procedure to request system information.
  • PRACH physical random access channel
  • the first physical random access channel PRACH resource set is a DU or the relay node is configured for the UE in the managed cell, and is different from the general PRACH resource.
  • the UE before transmitting the random access preamble, the UE receives the first system information sent by the DU or the relay node, where the first system information includes the first PRACH resource set.
  • the random access preamble sent by the UE from the PRACH resource selected in the first PRACH resource set is used for the DU or the relay node to identify, and the new indication information can be omitted, which is simple to implement.
  • the second system information is a primary system information MIB broadcast by the DU or the relay node, or a system information block 1SIB1 broadcast by the network device.
  • the DU or the relay node transmits the second system information through the main system information MIB or the system information block 1SIB1, and does not need to transmit the second system information through other forms of information, thereby saving transmission resources.
  • the terminal device sends a media access control protocol data unit MAC PDU to the network device, where the MAC PDU includes a message requesting the first system information.
  • the DU or the relay node may identify that the random access preamble is a PRACH resource selected by the UE from the first physical random access channel PRACH resource set, according to the received random access preamble sent by the UE. Or the relay node allocates the corresponding uplink resource location UL grant, and sends the UL grant to the UE by using a RAR message, after which the DU or the relay node can confirm that the system is requested by the RRC message sent by the UE received from the UL grant. Information message.
  • S303 The terminal device receives the first system information that is sent by the network device.
  • the terminal device before receiving the system information sent by the network device, the terminal device receives scheduling information of the system information sent by the network device, and the terminal device may receive the main system information MIB or system information broadcast by the network device.
  • the block 1SIB1 obtains the scheduling information from the MIB or the SIB1, and the terminal device receives the system information at a preset time according to the scheduling, thereby acquiring system information broadcast by the network device.
  • the system information is received at a preset time according to the scheduling, thereby acquiring system information broadcasted by the network device, which can ensure discontinuous reception of the terminal device, and improve receiving efficiency of the terminal device.
  • FIG. 11 is a schematic flowchart of a method for transmitting a system information request message and a response message according to an embodiment of the present disclosure, where the method includes but is not limited to the following steps:
  • the first network device sends a first message to the second network device, where the first message includes a system information request message and a cell identifier, where the cell identifier is an identifier of a cell corresponding to the system information request message, The cell corresponding to the cell identifier belongs to the third network device.
  • the first network device receives a second message sent by the second network device, where the second message indicates that the third network device sends system information of a cell corresponding to the system information request message;
  • the second message includes the cell identifier, where the first network device and the third network device are the same network device, or the first network device and the third network device are different network devices.
  • the first network device may be a relay node
  • the second network device may be another relay node or a donor base station. If the first network device and the third network device are the same network device, it indicates that the first network device has no child node device, and if the first network device and the third network device are different network devices, the first network is indicated. The device has a child node device.
  • the first message and the second message may be an F1AP message
  • the system information request message is an RRC message.
  • the third network device may manage one or more cells, and the cell identifier in the first message may be a cell identifier of a cell where the UE requesting system information under the third network device is located.
  • the second network device maintains a first information set, where the first information set includes an identifier of a cell directly managed by the second network device, and a first association table, where the first The association table includes a device identifier of the fourth network device and an identifier of the cell managed by the fourth network device, where the fourth network device is a child node device of the second network device; the fourth network device management The identifier of the cell includes the identifier of the cell directly managed by the fourth network device and the identifier of the cell indirectly managed by the fourth network device;
  • the first network device maintains a second information set, where the second information set includes an identifier of a cell directly managed by the first network device, and a second association table, where the first association table includes a fifth network device. And the identifier of the cell managed by the fifth network device, where the fifth network device is a child node device of the first network device; and the identifier of the cell managed by the fifth network device includes the The identifier of the cell directly managed by the network device and the identifier of the cell indirectly managed by the fifth network device.
  • a host base station DgNB
  • a relay node 1 to a relay node 7 RN1-RN7
  • the cells directly managed by the DgNB are the cell 18 (CGI18), the cell 19 (CGI19), and the cell 20 (CGI20).
  • the child nodes of the DgNB include RN1 and RN2, and the cells directly managed by the RN1 are the cell 16 (CGI16) and the cell 17 (CGI17).
  • the cells directly managed by RN2 are cell 13 (CGI13), cell 14 (CGI14), and cell 15 (CGI15); the child nodes of RN1 include RN3 and RN4, and the child nodes of RN2 include RN5, and the cell directly managed by RN3 is Cell 6 (CGI6), Cell 7 (CGI7), and Cell 8 (CGI8), the cell directly managed by RN4 is Cell 9 (CGI9) and Cell 10 (CGI10), and the cell directly managed by RN5 is Cell 11 (CGI11) and Cell 12 (CGI12); RN3 and RN5 have no child node equipment, RN4 child equipment includes RN6 and RN7, RN6 directly manages the cell is cell 1 (CGI1) and cell 2 (CGI2), and the cell directly managed by RN7 is cell 3 (CGI3) ), Cell 4 (CGI4) and Cell 5 (CGI5), RN6 and RN7 have no child nodes.
  • CGI13 Cell 6
  • CGI7 Cell 7
  • DgNB For DgNB, the content of its association table should be: CGI1, CGI2, CGI3, CGI4, CGI5, CGI6, CGI7, CGI8, CGI9, CGI10, CGI16, CGI17 belong to RN1; CGI11, CGI12, CGI13, CGI14, CGI15 belong to RN2. Therefore, the information contained in the DgNB maintained information set is: CGI1, CGI2, CGI3, CGI4, CGI5, CGI6, CGI7, CGI8, CGI9, CGI10, CGI16, CGI17 belong to RN1; CGI11, CGI12, CGI13, CGI14, CGI15 belong to RN2; CGI18, CGI19, CGI20.
  • the information contained in the information set maintained by RN1 is: CGI1, CGI2, CGI3, CGI4, CGI5 belongs to RN4; CGI6, CGI7, CGI8 belong to RN5; CGI16, CGI17.
  • the information contained in the information set maintained by RN2 is: CGI11, CGI12 belongs to RN5; CGI13, CGI14, CGI15.
  • the information contained in the information set maintained by RN3 is: CGI6, CGI7, CGI8.
  • the information contained in the information set maintained by RN4 is: CGI1, CGI2 belongs to RN6, CGI3, CGI4, and CGI5 belong to RN7.
  • the information contained in the information set maintained by RN5 is: CGI11, CGI12.
  • the information contained in the information set maintained by RN6 is: CGI1, CGI2.
  • the information contained in the information set maintained by RN7 is: CGI3, CGI4, CGI5.
  • the information in the first information set and the information in the second set may be the relay node notifying the parent relay node or the host base station when the sub-relay node establishes the connection or the sub-relay node update management cell. Or update.
  • the RN7 when the RN7 establishes a connection with the RN4, the RN7 notifies the RN4 that the cell it manages includes CGI3, CGI4, CGI5, and RN4, after receiving the notification message, adds CGI3, CGI4, and CGI5 to the information set of the RN7 and notifies the information set maintained by the RN4.
  • the cell managed by RN1 adds CGI3, CGI4, and CGI5.
  • RN1 After receiving the notification message, RN1 adds CGI3, CGI4, CGI5 to the information of RN4 and notifies DgNB in the information set it maintains, and the managed cell adds CGI3.
  • CGI4, CGI5, and DgNB After receiving the notification message, CGI4, CGI5, and DgNB add CGI3, CGI4, and CGI5 to the information of RN1 in the information set maintained by the DGINB. At this point, the entire update process is completed.
  • the first message that is sent by the relay node including the system information request message, and the second message that is sent by the host base station, by using the CGI of the cell that the UE requests the system information, Proper routing can be done to avoid adding extra information to the system information request message and the system information response message.
  • the first message includes a device identifier of the third network device
  • the second message includes a device identifier of the third network device
  • the second network device maintains a third information set, where the third information set includes a device identifier of the sixth network device and a third association table, where the third association table includes a device identifier of the sixth network device and has a sixth network device a device identifier of the seventh network device that is connected to the relationship; wherein the sixth network device is a child node device of the second network device, and the connection relationship includes the seventh network device and the sixth network device directly Connecting, or the seventh network device is indirectly connected to the sixth network device;
  • the first network device maintains a fourth information set, where the fourth information set includes a device identifier of the eighth network device and a fourth association table, where the fourth association table includes a device identifier of the eighth network device a device identifier of a ninth network device having a connection relationship with the eighth network device; wherein the eighth network device is a child node device of the first network device, and the connection relationship includes the ninth network device Directly connected to the eighth network device, or the ninth network device is indirectly connected to the eighth network device.
  • a host base station DgNB
  • a relay node 1 to a relay node 7 RN1-RN7
  • the child nodes of DgNB are RN1 and RN2
  • the child nodes of RN1 are RN3 and RN4
  • the child nodes of RN2 are RN5
  • the RN3 and RN5 have no child nodes
  • the child nodes of RN4 are RN6 and RN7
  • RN6 and RN7 do not. Child node device.
  • the content of its association table should be: RN3, RN4, RN6, RN7 belongs to RN1; RN5 belongs to RN2. Therefore, the information contained in the information set maintained by the DgNB is: RN3, RN4, RN6, and RN7 belong to RN1; RN5 belongs to RN2, RN1, and RN2.
  • the information contained in the information set maintained by RN1 is: RN6, RN7 belongs to RN4; RN3 and RN4.
  • the information contained in the information set maintained by RN2 is: RN5.
  • the information contained in the information set maintained by RN4 is: RN6 and RN7.
  • the information in the third information set and the information in the fourth set may be that the sub relay node notifies the parent relay node or the host base station to record or update when the sub relay node establishes the connection or the sub relay node updates the connection.
  • the RN4 adds the directly connected relay node (child node) to the information set maintained by the RN4 as the information of the RN7 and notifies the RN1 that the connected relay node adds the RN7, and the RN1 receives the notification.
  • the relay node that adds the RN4 connection in the information set maintained by the RN4 includes the information of the RN7 and notifies the DgNB that the connected relay node adds the RN7.
  • the DgNB is in the information set maintained by the DgNB.
  • the relay node to which the RN1 connection is added includes the RN7, and thus the entire update process is completed.
  • the CGI of the cell that includes the system information requested by the UE and the identifier of the relay node to which the cell belongs are For example, a UE under RN7 requests CGI1 system information, then the first message sent by RN7 includes CGI1 and RN7, and the second message sent by DgNB also includes CGI1 and RN7, so that the identity of the relay node can be used to correct
  • the advantage of this approach is that it reduces the amount of information stored by the relay node and the host base station.
  • the second message includes a device identifier of the third network device, the second network device is a host base station, and the first network device is a relay node;
  • the second network device maintains a fifth information set and a sixth information set
  • the fifth information set includes an identifier of a cell directly managed by the second network device, and a fifth association table, where the fifth association table includes a device identifier of the tenth network device and an identifier of a cell directly managed by the tenth network device
  • the tenth network device has a connection relationship with the second network device, and the connection relationship includes that the tenth network device is directly connected to the second network device, or the tenth network device and the Indirectly connecting the second network device;
  • the sixth information set includes a device identifier of the eleventh network device and a sixth association table, where the sixth association table includes a device identifier of the eleventh network device and a connection relationship with the eleventh network device The device identifier of the twelfth network device; wherein the eleventh network device is a child node device of the second network device, and the connection relationship includes the twelfth network device and the eleventh network The device is directly connected, or the twelfth network device is indirectly connected to the eleventh network device;
  • the first network device maintains a seventh information set, where the seventh information set includes a device identifier seventh association table of the thirteenth network device, and the seventh association table includes a device identifier of the thirteenth network device And a device identifier of the fourteenth network device having a connection relationship with the thirteenth network device; wherein the thirteenth network device is a child node device of the first network device, and the connection relationship includes the The fourteenth network device is directly connected to the thirteenth network device, or the fourteenth network device is indirectly connected to the thirteenth network device.
  • a host base station DgNB
  • a relay node 1 to a relay node 7 RN1-RN7
  • the information contained in the fifth set maintained by the DgNB is: CGI1, CGI2 belongs to RN6; CGI3, CGI4, CGI5 belong to RN7; CGI6, CGI7, CGI8 belong to RN3; CGI9 CGI10 belongs to RN4; CGI11, CGI12 belongs to RN5; CGI13, CGI14, CGI15 belong to RN2; CGI16, CGI17 belongs to RN1; CGI18, CGI19, CGI20.
  • the child nodes of DgNB are RN1 and RN2, the child nodes of RN1 are RN3 and RN4, the child nodes of RN2 are RN5, the RN3 and RN5 have no child nodes, the child nodes of RN4 are RN6 and RN7, and RN6 and RN7 do not. Child node device.
  • the content of its sixth association table should be: RN3, RN4, RN6, RN7 belongs to RN1; RN5 belongs to RN2. Therefore, the information contained in the sixth information set maintained by the DgNB is: RN3, RN4, RN6, and RN7 belong to RN1; and RN5 belongs to RN2, RN1, and RN2.
  • the information included in the seventh information set maintained by the RN1 is: RN6, RN7 belongs to RN4, and RN3 and RN4.
  • the information contained in the seventh information set maintained by RN2 is: RN5.
  • the information contained in the seventh information set maintained by the RN4 is: RN6 and RN7.
  • the information in the third information set and the information in the fourth set may be that the sub relay node notifies the parent relay node or the host base station to record or update when the sub relay node establishes the connection or the sub relay node updates the connection.
  • the RN4 adds the directly connected relay node (child node) to the information set maintained by the RN4 as the information of the RN7 and notifies the RN1 that the connected relay node adds the RN7, and the RN1 receives the notification.
  • the relay node that adds the RN4 connection in the information set maintained by the RN4 includes the information of the RN7 and notifies the DgNB that the connected relay node adds the RN7.
  • the DgNB is in the information set maintained by the DgNB.
  • the relay node that adds the RN1 connection includes the RN7, and the entire update process is completed.
  • DgNB maintains a more information set containing CGI than the relay node, and the information set maintained by the DgNB includes the correspondence between the CGI and the relay node identifier, so in the first message sent by the relay node, only The CGI of the cell that the UE requests the system information is required, and since the information set of each relay node includes only the identifier of the relay node that is directly or indirectly connected, the second message sent by the DgNB includes In addition to the CGI of the cell in which the UE requests the system information, the UE needs to include the identity of the relay node to which the cell belongs, so that the correct route can be performed to ensure the reliability of message transmission. For example, one UE under the RN7 requests the system information of the CGI1, and the first message sent by the RN7 only needs to include the CGI1, and the second message sent by the DgNB needs to include the RN7 in addition to the CGI1.
  • FIG. 15 is a schematic flowchart of a method for transmitting a system information request message and a response message according to an embodiment of the present disclosure, where the method includes but is not limited to the following steps:
  • the second network device receives the first message sent by the first network device, where the first message includes a system information request message and a cell identifier, and the cell identifier is an identifier of a cell corresponding to the system information request message.
  • the cell corresponding to the cell identifier belongs to the third network device.
  • the second network device sends a second message to the first network device, where the second message indicates that the third network device sends system information of a cell corresponding to the system information request message;
  • the second network device includes the cell identifier, where the first network device and the third network device are the same network device, or the first network device and the third network device are different network devices.
  • FIG. 16 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • the terminal device 10 may include at least: a first sending unit 110 and a first receiving unit 120; wherein:
  • the first sending unit 110 is configured to send a media access control sub-protocol data unit MAC subPDU to the network device;
  • the MAC subPDU includes first indication information and a media access control service data unit MAC SDU, and the first indication information indicates that the MAC SDU includes a message requesting system information.
  • the first receiving unit 120 is configured to receive system information sent by the network device.
  • the terminal device before the terminal device sends the MAC subPDU to the network device,
  • the first receiving unit 120 is further configured to receive second indication information that is sent by the network device, where the second indication information is used to indicate that the network device supports the terminal device to use the first value of the LCID.
  • the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, so that the network device can be according to the first
  • the indication information identifies the message that the MAC SDU transmits to request the system information, which can effectively prevent the network device from erroneously rejecting the system information request of the terminal device, and can also avoid waste of transmission resources.
  • FIG. 17 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • the terminal device 20 may include at least: a first selecting unit 210, a second sending unit 220, and a second receiving unit 230; wherein:
  • the first selecting unit 210 is configured to select a PRACH resource from the first physical random access channel PRACH resource set;
  • the first PRACH resource set is used to send a set of PRACH resources used by the random access preamble when the user equipment initiates a random access procedure to request system information.
  • the second sending unit 220 is configured to send a random access preamble to the network device, where the second sending unit 220 is further configured to send a media access control sub-protocol data unit MAC sub PDU to the network device, where the MAC subPDU is transmitted as a request.
  • the message of the first system information is configured to send a random access preamble to the network device, where the second sending unit 220 is further configured to send a media access control sub-protocol data unit MAC sub PDU to the network device, where the MAC subPDU is transmitted as a request.
  • the second receiving unit 230 is configured to receive first system information that is sent by the network device.
  • the second receiving unit 230 is further configured to receive second system information sent by the network device, where the second system The information includes the first PRACH resource set.
  • the embodiment of the present invention may be configured to: according to the random access preamble sent by the received terminal device from the PRACH resource selected by the first PRACH resource set, identify that the MAC subPDU sent by the terminal device transmits the message requesting the first system information, It can effectively avoid the network device erroneously rejecting the system information request of the terminal device, and can also avoid the waste of transmission resources.
  • FIG. 18 is a schematic structural diagram of a first network device according to an embodiment of the present invention.
  • the first network device 30 may include at least: a first receiving unit 310 and a first sending unit 320; wherein:
  • the first receiving unit 310 is configured to receive a media access control sub-protocol data unit MAC subPDU sent by the terminal device;
  • the MAC subPDU includes first indication information and a media access control service data unit MAC SDU, and the first indication information indicates that the MAC SDU includes a message requesting system information.
  • the first sending unit 320 is configured to send a request message to the second network device, where the request message includes the message requesting system information.
  • the first receiving unit 310 is further configured to receive a response message sent by the second network device, where the first sending unit 320 is further configured to send system information to the terminal device.
  • the first sending unit 320 before the receiving the MAC sub PDU sent by the terminal device, is further configured to send second indication information to the terminal device, where the second indication information is used to indicate The first network device supports the terminal device to use the first value of the LCID.
  • the first indication information and the media access control service data unit MAC SDU sent by the received terminal device may be used to identify, by using the first indication information, that the MAC SDU is transmitted for requesting system information.
  • the message can effectively prevent the first network device from erroneously rejecting the system information request of the terminal device, and can also avoid waste of transmission resources.
  • FIG. 19 is a schematic structural diagram of a second network device according to an embodiment of the present invention.
  • the second network device 40 may include at least: a second receiving unit 410 and a second sending unit 420; wherein:
  • the second receiving unit 410 is configured to receive a request message sent by the first network device, where
  • the request message is a message that is sent by the first network device after the MAC sub PDU is used to request system information according to the first indication information, where the MAC subPDU is sent by the terminal device to the first network device.
  • the MAC subPDU includes first indication information and a medium access control service data unit MAC SDU, and the first indication information indicates that the MAC SDU includes a message requesting system information.
  • the second sending unit 420 is configured to send a response message to the first network device, so that the first network device sends system information to the terminal device.
  • the embodiment of the present invention can effectively prevent the erroneous rejection of the system information request of the terminal device by receiving the request message sent by the first network device after the message that the MAC SDU includes the system information is requested according to the first indication information. It also avoids wasting transmission resources.
  • FIG. 20 is a schematic structural diagram of a first network device according to an embodiment of the present invention.
  • the first network device 50 may include at least: a first sending unit 510 and a first receiving unit 520; wherein:
  • the first sending unit 510 is configured to send a first message to the second network device.
  • the first message includes a system information request message and a cell identifier, where the cell identifier is an identifier of a cell corresponding to the system information request message, and the cell corresponding to the cell identifier belongs to a third network device.
  • the first receiving unit 520 is configured to receive a second message sent by the second network device.
  • the second message indicates that the third network device sends the system information of the cell corresponding to the system information request message, and the second message includes the cell identifier.
  • the first network device further includes a first maintenance unit 530, where the first maintenance unit 530 is configured to maintain a second information set, where the second information set includes the first network An identifier of the cell that is directly managed by the device, and a second association table, where the first association table includes a device identifier of the fifth network device and an identifier of the cell managed by the fifth network device, where the fifth network device is The sub-node device of the first network device; the identifier of the cell managed by the fifth network device includes an identifier of a cell directly managed by the fifth network device and an identifier of a cell indirectly managed by the fifth network device.
  • the embodiment of the present invention can ensure that the first message is correctly transmitted to the second network device, and can also ensure that the second message sent by the second network device is correctly received.
  • FIG. 21 is a schematic structural diagram of a second network device according to an embodiment of the present invention.
  • the second network device 60 may include at least: a second receiving unit 610 and a second sending unit 620; wherein:
  • the second receiving unit 610 is configured to receive a first message sent by the first network device.
  • the first message includes a system information request message and a cell identifier, where the cell identifier is an identifier of a cell corresponding to the system information request message, and the cell corresponding to the cell identifier belongs to a third network device.
  • the second sending unit 620 is configured to send a second message to the first network device.
  • the second message indicates that the third network device sends the system information of the cell corresponding to the system information request message, and the second message includes the cell identifier.
  • the second network further includes a second maintenance unit 630, where the second maintenance unit 630 is configured to maintain a first information set, where the first information set includes the second network device An identifier of the directly managed cell and a first association table, where the first association table includes a device identifier of the fourth network device and an identifier of the cell managed by the fourth network device, where the fourth network device is a child node device of the second network device; the identifier of the cell managed by the fourth network device includes an identifier of a cell directly managed by the fourth network device and an identifier of a cell indirectly managed by the fourth network device.
  • the embodiment of the present invention can ensure that the first message sent by the first network device is correctly received, and the second message can be correctly transmitted to the first network device.
  • FIG. 22 is a terminal device 100 according to an embodiment of the present invention.
  • the terminal device 100 includes a processor 101, a memory 102, and a transceiver 103.
  • the processor 101, the memory 102, and the transceiver 103 pass through a bus 104. Connected to each other.
  • the memory 102 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), or an erasable programmable read only memory (Erasable Programmable Read-Only Mmory, EPROM or fast). Flash memory), the memory 102 is used for related instructions and data.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable Programmable Read-Only Mmory
  • Flash memory the memory 102 is used for related instructions and data.
  • the transceiver 103 can include a receiver and a transmitter, for example, a radio frequency module.
  • the processor 101 described below receives or transmits a message, which can be understood to be received or transmitted by the processor 101 through the transceiver.
  • the processor 101 may be one or more central processing units (CPUs).
  • CPUs central processing units
  • the CPU may be a single core CPU or a multi-core CPU.
  • the processor 101 in the terminal device 100 is configured to read the program code stored in the memory 102 and perform the following operations:
  • the processor 101 sends a media access control sub-protocol data unit MAC sub-PDU to the network device by using the transceiver 103, where the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates The MAC SDU includes a message requesting system information.
  • the processor 101 receives the system information sent by the network device through the transceiver 103.
  • the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, so that the network device can be according to the first
  • the indication information identifies the message that the MAC SDU transmits to request the system information, which can effectively prevent the network device from erroneously rejecting the system information request of the terminal device, and can also avoid waste of transmission resources.
  • FIG. 23 is a terminal device 200 according to an embodiment of the present invention.
  • the terminal device 200 includes a processor 201, a memory 202, and a transceiver 203.
  • the processor 201, the memory 202, and the transceiver 203 pass through a bus 204. Connected to each other.
  • the memory 202 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), or an erasable programmable read only memory (Erasable Programmable Read-Only Mmory, EPROM or fast). Flash memory), the memory 202 is used for related instructions and data.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable Programmable Read-Only Mmory
  • Flash memory the memory 202 is used for related instructions and data.
  • the transceiver 203 can include a receiver and a transmitter, such as a radio frequency module.
  • the processor 201 described below receives or transmits a message, which can be understood to be received or transmitted by the processor 201 through the transceiver.
  • the processor 201 may be one or more central processing units (CPUs). In the case where the processor 201 is a CPU, the CPU may be a single core CPU or a multi-core CPU.
  • the processor 201 in the terminal device 200 is configured to read the program code stored in the memory 202 and perform the following operations:
  • the processor 201 sends a random access preamble to the network device by using the transceiver 203 to select a PRACH resource from the first physical random access channel (PRACH) resource set; the first PRACH resource set is requested by the user equipment to initiate a random access procedure.
  • PRACH physical random access channel
  • the system information is used to send a set of PRACH resources used by the random access preamble.
  • the processor 201 sends a media access control sub-protocol data unit MAC sub PDU to the network device through the transceiver 203, where the MAC subPDU transmits a message requesting the first system information.
  • the processor 201 receives, by the transceiver 203, the first system information that is sent by the network device.
  • the embodiment of the present invention may be configured to: according to the random access preamble sent by the received terminal device from the PRACH resource selected by the first PRACH resource set, identify that the MAC subPDU sent by the terminal device transmits the message requesting the first system information, It can effectively avoid the network device erroneously rejecting the system information request of the terminal device, and can also avoid the waste of transmission resources.
  • FIG. 24 is a first network device 300 according to an embodiment of the present invention.
  • the first network device 300 includes a processor 301, a memory 302, and a transceiver 303.
  • the processor 301, the memory 302, and the transceiver The 303 are connected to each other through a bus 304.
  • the memory 302 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), or an erasable programmable read only memory (Erasable Programmable Read-Only Mmory, EPROM or fast). Flash memory), the memory 302 is used for related instructions and data.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable Programmable Read-Only Mmory
  • Flash memory Flash memory
  • the transceiver 303 can include a receiver and a transmitter, for example, a radio frequency module.
  • the processor 301 described below receives or transmits a message, which can be understood to be received or transmitted by the processor 301 through the transceiver.
  • the processor 301 may be one or more central processing units (CPUs). In the case where the processor 301 is a CPU, the CPU may be a single core CPU or a multi-core CPU.
  • the processor 301 in the terminal device 300 is configured to read the program code stored in the memory 302 and perform the following operations:
  • the processor 301 receives, by the transceiver 303, a media access control sub-protocol data unit MAC sub-PDU sent by the terminal device, where the MAC sub-PDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates The MAC SDU includes a message requesting system information.
  • the processor 301 sends a request message to the second network device via the transceiver 303, the request message including the message requesting system information.
  • the processor 301 transmits system information to the terminal device through the transceiver 303.
  • the first indication information and the media access control service data unit MAC SDU sent by the received terminal device may be used to identify, by using the first indication information, that the MAC SDU is transmitted for requesting system information.
  • the message can effectively prevent the first network device from erroneously rejecting the system information request of the terminal device, and can also avoid waste of transmission resources.
  • FIG. 25 is a second network device 400 according to an embodiment of the present invention.
  • the second network device 400 includes a processor 401, a memory 402, and a transceiver 403.
  • the processor 401, the memory 402, and the transceiver 403 are connected to each other through a bus 404.
  • the memory 402 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), or an erasable programmable read only memory (Erasable Programmable Read-Only Mmory, EPROM or fast). Flash memory), which is used for related instructions and data.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable Programmable Read-Only Mmory
  • Flash memory which is used for related instructions and data.
  • the transceiver 403 can include a receiver and a transmitter, for example, a radio frequency module.
  • the processor 401 described below receives or transmits a message, which can be understood by the processor 401 to receive or transmit through the transceiver.
  • the processor 401 may be one or more central processing units (CPUs). In the case where the processor 401 is a CPU, the CPU may be a single core CPU or a multi-core CPU.
  • the processor 401 in the terminal device 400 is configured to read the program code stored in the memory 402 and perform the following operations:
  • the processor 401 receives, by using the transceiver 403, a request message sent by the first network device, where the request message is sent by the first network device after the first sub-network device identifies the MAC sub-PDU for requesting system information, where The MAC subPDU is sent by the terminal device to the first network device, where the MAC subPDU includes first indication information and a media access control service data unit MAC SDU, where the first indication information indicates that the MAC SDU includes a request. System information message.
  • the processor 401 sends a response message to the first network device through the transceiver 403, so that the first network device sends system information to the terminal device.
  • the embodiment of the present invention can effectively prevent the erroneous rejection of the system information request of the terminal device by receiving the request message sent by the first network device after the message that the MAC SDU includes the system information is requested according to the first indication information. It also avoids wasting transmission resources.
  • FIG. 26 is a first network device 500 according to an embodiment of the present invention.
  • the first network device 500 includes a processor 501, a memory 502, and a transceiver 503.
  • the processor 501, the memory 502, and the transceiver 503 are connected to each other through a bus 504.
  • the memory 502 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), or an erasable programmable read only memory (Erasable Programmable Read-Only Mmory, EPROM or fast). Flash memory), the memory 502 is used for related instructions and data.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable Programmable Read-Only Mmory
  • Flash memory Flash memory
  • the transceiver 503 can include a receiver and a transmitter, for example, a radio frequency module.
  • the processor 501 described below receives or transmits a message, which can be understood by the processor 501 to receive or transmit through the transceiver.
  • the processor 501 may be one or more central processing units (CPUs).
  • the processor 501 is a CPU, the CPU may be a single core CPU or a multi-core CPU.
  • the processor 501 in the terminal device 500 is configured to read the program code stored in the memory 502, and perform the following operations:
  • the processor 501 sends a first message to the second network device by using the transceiver 503.
  • the first message includes a system information request message and a cell identifier, and the cell identifier is an identifier of a cell corresponding to the system information request message.
  • the cell corresponding to the cell identifier belongs to the third network device.
  • the processor 501 receives the second message sent by the second network device by using the transceiver 503, where the second message indicates that the third network device sends the system information of the cell corresponding to the system information request message;
  • the cell identifier is included in the second message.
  • the embodiment of the present invention can ensure that the first message is correctly transmitted to the second network device, and can also ensure that the second message sent by the second network device is correctly received.
  • FIG. 27 is a second network device 600 according to an embodiment of the present invention.
  • the second network device 600 includes a processor 601, a memory 602, and a transceiver 603.
  • the processor 601, the memory 602, and the transceiver 603 are connected to each other through a bus 604.
  • the memory 602 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), or an erasable programmable read only memory (Erasable Programmable Read-Only Mmory, EPROM or fast). Flash memory), which is used for related instructions and data.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable Programmable Read-Only Mmory
  • Flash memory which is used for related instructions and data.
  • the transceiver 603 can include a receiver and a transmitter, for example, a radio frequency module.
  • the processor 601 described below receives or transmits a message, which can be understood by the processor 401 to receive or transmit through the transceiver.
  • the processor 601 may be one or more central processing units (CPUs). In the case where the processor 601 is a CPU, the CPU may be a single core CPU or a multi-core CPU.
  • CPUs central processing units
  • the processor 601 in the terminal device 600 is configured to read the program code stored in the memory 602, and perform the following operations:
  • the processor 601 receives the first message sent by the first network device by using the transceiver 603, where the first message includes a system information request message and a cell identifier, and the cell identifier is an identifier of a cell corresponding to the system information request message.
  • the cell corresponding to the cell identifier belongs to the third network device.
  • the processor 401 sends a second message to the first network device by using the transceiver 403, where the second message indicates that the third network device sends system information of a cell corresponding to the system information request message;
  • the cell identifier is included in the message.
  • the embodiment of the present invention can ensure that the first message sent by the first network device is correctly received, and the second message can be correctly transmitted to the first network device.
  • a computer readable storage medium stores a computer program, where the computer program includes program instructions, and when the program instructions are executed by a processor, the first network device is implemented.
  • the computer readable storage medium may be the internal storage unit of the foregoing terminal device, the first network device or the second network device, such as the hard disk or the memory of the first network device or the second network device.
  • the computer readable storage medium may also be an external storage device of the first network device or the second network device, such as a plug-in hard disk provided on the first network device or the second network device, and a smart memory card (Smart Media Card) , SMC), Secure Digital (SD) card, Flash Card, etc.
  • the computer readable storage medium may further include an internal storage unit of the first network device or the second network device, and an external storage device.
  • the computer readable storage medium described above is for storing the above computer program and other programs and data required by the first network device or the second network device.
  • the computer readable storage medium described above can also be used to temporarily store data that has been output or is about to be output.
  • the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
  • the modules in the apparatus of the embodiment of the present invention may be combined, divided, and deleted according to actual needs.

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Abstract

本发明实施例提供了一种请求系统信息的指示方法、相关设备及系统。其中,该方法应用于CU-DU分离系统或中继系统中,该方法包括:终端设备向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;所述终端设备获取所述网络设备发送的系统信息。通过第一指示信息识别出MAC SDU包括请求系统信息的消息,可以有效避免网络设备错误的拒绝终端的系统信息请求,还可以有效避免传输资源浪费。

Description

一种请求系统信息的指示方法、相关设备及系统 技术领域
本发明涉及通信领域,尤其涉及一种请求系统信息的指示方法、相关设备及系统。
背景技术
为了增强网络覆盖,提高网络容量,一种有效的方法是部署中继节点。在部署了中继节点的系统架构中,UE通过中继节点与基站连接,这种情况下,中继节点连接的基站可以成为宿主基站(Donor基站),而宿主基站可以连接到核心网。
根据第三代合作伙伴项目(3rd Generation Partnership Project,简称3GPP)的协议规定,现有的系统信息大多需要通过广播的方式从网络(network)发送到用户设备(User Equipment,简称UE)。例如,在长期演进(Long Term Evolution,简称LTE)技术中,系统信息(System Information,简称SI)包括主信息块(Master Information Block,简称MIB)系统基本配置信息以及系统信息块(System Information Block,简称SIB)信息,其中,主信息块系统基本配置信息和部分系统信息块信息的广播周期固定,其余部分的系统信息块信息的广播周期在固定范围内可调。即使用户设备当前不需要获取系统信息,其仍必须时刻监听广播信道中的广播内容来获取这两部分信息。
在新无线(New Radio,简称NR)技术中,最小系统信息(Minimum System Information,简称MSI)必须广播,而有些系统信息并不是所有用户设备都需要的,对于这部分系统信息,网络不需要一直周期性广播,而是可以根据用户设备的需求来按需广播。
在5G NR系统中,引入了CU-DU分离技术,即将NR的基站从逻辑上分为两个节点,gNB-DU(Distributed Unit)和gNB-CU(Central Unit)。UE通过gNB-DU连接到gNB-CU,并通过gNB-CU连接到核心网的系统称为CU-DU分离系统,UE通过中继节点连接到基站,并通过基站连接到核心网的系统称为中继系统,对于CU-DU分离系统或中继系统,在用户设备需要请求系统信息时,存在不能准确识别用户设备发送的系统信息请求消息而错误的拒绝用户设备的系统信息请求,而且在传递系统信息请求消息时会包含不必要的信息而造成资源的浪费。
发明内容
实施例提供了一种请求系统信息的指示方法、相关设备及系统,能够准确识别出系统信息请求消息,避免错误的拒绝用户设备的系统信息请求和传输资源的浪费。
第一方面,本发明实施例提供了一种获取系统信息的方法,所述方法应用于CU-DU分离系统或中继系统中,所述方法包括:
终端设备向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;
所述终端设备获取所述网络设备发送的系统信息。
实施本发明实施例,通过向网络设备发送媒体接入控制子协议数据单元MAC subPDU,MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,以使网络设备可以根据所述第一指示信息识别出MAC SDU传输的为请求系统信息的消息,可以有效避免网络设备错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
在一个可选的实现方式中,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的逻辑信道 标识LCID的值,所述LCID的值用于包括指示所述MAC SDU传输的是请求系统信息的消息。
实施本发明实施例,通过设置LCID的值形成第一指示信息,实现简单,便于网络识别,高效可靠。
在一个可选的实现方式中,所述请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
实施本发明实施例,可以通过CCCH传输的RRC消息或DCCH传输的RRC消息来传输请求系统信息的消息,方便网络设备识别。
在一个可选的实现方式中,所述LCID的值为第一值时,所述LCID的值指示所述MAC SDU传输的是通过所述CCCH或DCCH传输的请求系统信息的RRC消息。
实施本发明实施例,可以通过对LCID的值进行预设,以指示所述MAC SDU传输的是通过所述CCCH或DCCH传输的请求系统信息的RRC消息,只需要对LCID的值进行识别,简单高效。
在一个可选的实现方式中,所述终端设备向网络设备发送MAC subPDU之前,所述方法还包括:
所述终端设备接收所述网络设备发送的第二指示信息,所述第二指示信息用于指示所述网络设备支持所述终端设备使用所述LCID的第一值。
实施本发明实施例,可以通过第二指示信息来预先通知终端设备可以使用LCID的值作为第一指示信息,网络设备能够识别LCID的值,从而识别出请求系统信息的消息。
在一个可选的实现方式中,所述第二指示信息包含于所述网络设备广播的主系统信息MIB中,或者包含于所述网络设备广播的系统信息块1SIB1中。
实施本发明实施例,可以通过MIB或SIB1来发送第二指示信息,MIB或SIB1是已有的消息形式,不用再通过其它的消息来发送第二指示信息,简单方便,节约资源。
在一个可选的实现方式中,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的预留比特的值,所述预留比特的值指示所述MAC SDU传输的是请求系统信息的消息。
实施本发明实施例,可以通过对预留比特的值进行预设,以指示所述MAC SDU传输的是请求系统信息的消息,只需要对预留比特的值进行识别,简单高效。
在一个可选的实现方式中,所述请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
实施本发明实施例,可以通过CCCH传输的RRC消息或DCCH传输的RRC消息来传输请求系统信息的消息,方便网络设备识别。
在一个可选的实现方式中,所述预留比特的值为第一值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的请求系统信息的RRC消息;所述预留比特的值为第二值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的RRC连接建立请求消息,或RRC连接重建立请求消息,或RRC连接恢复消息。
实施本发明实施例,可以通过对预留比特的值进行预设,以指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的请求系统信息的RRC消息,只需要对预留比特的值进行识别,简单高效。
第二方面,本发明实施例提供了一种请求系统信息的指示方法,所述方法应用于CU-DU分离系统或中继系统中,所述方法包括:
第一网络设备接收终端设备发送的媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;
所述第一网络设备向第二网络设备发送请求消息,所述请求消息包括所述请求系统信息的消息;
所述第一网络设备向所述终端设备发送系统信息。
实施本发明实施例,可以根据接收到的终端设备发送的包括第一指示信息和媒体接入控制业务数据单元MAC SDU,通过第一指示信息识别出所述MAC SDU传输的是用于请求系统信息的消息,可以有效避免第一网络设备错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
在一个可选的实现方式中,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的逻辑信道标识LCID的值,所述LCID的值用于包括指示所述MAC SDU传输的是请求系统信息的消息。
实施本发明实施例,通过设置LCID的值形成第一指示信息,实现简单,便于网络识别,高效可靠。
在一个可选的实现方式中,所述请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
实施本发明实施例,可以通过CCCH传输的RRC消息或DCCH传输的RRC消息来传输请求系统信息的消息,方便网络设备识别。
在一个可选的实现方式中,所述LCID的值为第一值时,所述LCID的值指示所述MAC SDU传输的是通过所述CCCH或DCCH传输的请求系统信息的RRC消息。
实施本发明实施例,可以通过对LCID的值进行预设,以指示所述MAC SDU传输的是通过所述CCCH或DCCH传输的请求系统信息的RRC消息,只需要对LCID的值进行识别,简单高效。
在一个可选的实现方式中,所述第一网络设备接收终端设备发送的MAC subPDU之前,所述方法还包括:
所述第一网络设备向所述终端设备发送第二指示信息,所述第二指示信息用于指示所述第一网络设备支持所述终端设备使用所述LCID的第一值。
实施本发明实施例,可以通过第二指示信息来预先通知终端设备可以使用LCID的值作为第一指示信息,网络设备能够识别LCID的值,从而识别出请求系统信息的消息。
在一个可选的实现方式中,所述第二指示信息包含于所述网络设备广播的主系统信息MIB中,或者包含于所述网络设备广播的系统信息块1SIB1中。
实施本发明实施例,可以通过MIB或SIB1来发送第二指示信息,MIB或SIB1是已有的消息形式,不用再通过其它的消息来发送第二指示信息,简单方便,节约资源。
在一个可选的实现方式中,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的预留比特的值,所述预留比特的值指示所述MAC SDU传输的是请求系统信息的消息。
实施本发明实施例,可以通过对预留比特的值进行预设,以指示所述MAC SDU传输的是请求系统信息的消息,只需要对预留比特的值进行识别,简单高效。
在一个可选的实现方式中,所述请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
实施本发明实施例,可以通过CCCH传输的RRC消息或DCCH传输的RRC消息来传输请求系统信息的消息,方便网络设备识别。
在一个可选的实现方式中,所述预留比特的值为第一值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的请求系统信息的RRC消息;
所述预留比特的值为第二值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的RRC连接建立请求消息,或RRC连接重建立请求消息,或RRC连接恢复消息。
实施本发明实施例,可以通过对预留比特的值进行预设,以指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的请求系统信息的RRC消息,只需要对预留比特的值进行识别,简单高效。
第三方面,本发明实施例提供了一种请求系统信息的指示方法,所述方法应用于CU-DU分离系统或中继系统中,所述方法包括:
第二网络设备接收第一网络设备发送的请求消息,所述请求消息是所述第一网络设备根据第一指示信息识别出MAC subPDU用于请求系统信息后,发送的消息,其中,所述MAC subPDU为终端设备发送给所述第一网络设备的,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;
所述第二网络设备根据所述请求消息向所述第一网络设备发送响应消息,以使所述第一网络设备向所述终端设备发送系统信息。
实施本发明实施例,通过接收第一网络设备根据第一指示信息识别出所述MAC SDU包括请求系统信息的消息后,发送的请求消息,可以有效的避免错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
第四方面,本发明实施例提供了一种请求系统信息的指示方法,所述方法应用于CU-DU分离系统或中继系统中,所述方法包括:
终端设备从第一物理随机接入信道PRACH资源集合中选择PRACH资源向网络设备发送随机接入前导;所述第一PRACH资源集合为所述用户设备发起随机接入过程来请求系统信息时用于发送随机接入前导所使用的PRACH资源的集合;
所述终端设备向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU传输的为请求第一系统信息的消息;
所述终端设备接收所述网络设备发送的第一系统信息。
实施本发明实施例,可以根据接收到的终端设备从第一PRACH资源集合中选择的PRACH资源发送的随机接入前导,识别出终端设备发送的MAC subPDU传输的为请求第一系统信息的消息,可以有效避免网络设备错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
在一个可选的实现方式中,所述方法还包括:
所述终端设备在发送所述随机接入前导前,接收所述网络设备发送的第二系统信息,所述第二系统信息中包含所述第一PRACH资源集合。
实施本发明实施例,通过预先接收网络设备发送的包含第一PRACH资源集合的第二系统信息,从第一PRACH资源集合中选择的PRACH资源发送的随机接入前导以便于网络设备进行识别,简单可靠,提高了识别的准确性。
在一个可选的实现方式中,所述方法还包括:
所述第二系统信息为所述网络设备广播的主系统信息MIB,或者所述网络设备广播的系统信息块1SIB1。
实施本发明实施例,通过主系统信息MIB或者系统信息块1SIB1来传送第二系统信息,不需要再通过其它形式的信息来传送第二系统信息,节约了传输资源。
第五方面,本发明实施例提供了一种系统信息请求消息和响应消息的传输方法,其特征在于,所述方法包括:
第一网络设备向第二网络设备发送第一消息;所述第一消息包括系统信息请求消息和小区标识;所述小区标识为所述系统信息请求消息所对应的小区的标识;所述小区标识所对应的小区属于第三网络设备;
所述第一网络设备接收所述第二网络设备发送的第二消息;所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息;所述第二消息中包含所述小区标识;
其中,所述第一网络设备和所述第三网络设备为同一网络设备,或者所述第一网络设备和所述第三网络设备为不同网络设备。
实施本发明实施例,可以保证第一消息正确的传送到第二网络设备,也能够保证正确的接收到第二网络设备发送的第二消息。
在一个可选的实现方式中,所述第二网络设备维护有第一信息集合,所述第一信息集合包括所述第二网络设备直接管理的小区的标识和第一关联表,所述第一关联表包括第四网络设备的设备标识和所述第四网络设备管理的小区的标识;其中,所述第四网络设备为所述第二网络设备的子节点设备;所述第四网络设备管理的小区的标识包括所述第四网络设备直接管理的小区的标识和所述第四网络设备间接管理的小区的标识;
所述第一网络设备维护有第二信息集合,所述第二信息集合包括所述第一网络设备直接管理的小区的标识和第二关联表,所述第一关联表包括第五网络设备的设备标识和所述第五网络设备管理的小区的标识;其中,所述第五网络设备为所述第一网络设备的子节点设备;所述第五网络设备管理的小区的标识包括所述第五网络设备直接管理的小区的标识和所述第五网络设备间接管理的小区的标识。
实施本发明实施例,通过利用小区的标识和第一关联表,以及小区的标识和第二关联表保证消息传送的准确性。
在一个可选的实现方式中,所述第一消息中包含所述第三网络设备的设备标识,所述第二消息中包含所述第三网络设备的设备标识;
所述第二网络设备维护有第三信息集合,所述第三信息集合包括第六网络设备的设备标识和第三关联表,所述第三关联表包括所述第六网络设备的设备标识和与所述第六网络设备具有连接关系的第七网络设备的设备标识;其中,所述第六网络设备为所述第二网络设备的子节点设备,所述连接关系包括所述第七网络设备与所述第六网络设备直接连接,或者所述第七网络设备与所述第六网络设备间接连接;
所述第一网络设备维护有第四信息集合,所述第四信息集合包括第八网络设备的设备标识和第四关联表,所述第四关联表包括所述第八网络设备的设备标识和与所述第八网络设备具有连接关系的第九网络设备的设备标识;其中,所述第八网络设备为所述第一网络设备的子节点设备,所述连接关系包括所述第九网络设备与所述第八网络设备直接连接,或者所述第九网络设备与所述第八网络设备间接连接。
实施本发明实施例,通过利用网络设备的设备标识和第三关联表,以及网络设备的设备标识和第四关联表保证消息传送的准确性。
在一个可选的实现方式中,所述第二消息中包含所述第三网络设备的设备标识;
所述第二网络设备维护有第五信息集合和第六信息集合;
所述第五信息集合包括第二网络设备直接管理的小区的标识和第五关联表,所述第五关联表包括第十网络设备的设备标识和所述第十网络设备直接管理的小区的标识;其中,所述第十网络设备与所述第二网络设备具有连接关系,所述连接关系包括所述第十网络设备与所述第二网络设备直接连接,或者所述第十网络设备与所述第二网络设备间接连接;
所述第六信息集合包括第十一网络设备的设备标识和第六关联表,所述第六关联表包括所述第十一网络设备的设备标识和与所述第十一网络设备具有连接关系的第十二网络设备的设备标识;其中,所述第十一网络设备为所述第二网络设备的子节点设备,所述连接关系包括所述第十二网络设备与所述第十一网络设备直接连接,或者所述第十二网络设备与所述第十一网络设备间接连接;
所述第一网络设备维护有第七信息集合,所述第七信息集合包括第十三网络设备的设备标识第七关联表,所述第七关联表包括所述第十三网络设备的设备标识和与所述第十三网络设备具有连接关系的第十四网络设备的设备标识;其中,所述第十三网络设备为所述第一网络设备的子节点设备,所述连接关系包括所述第十四网络设备与所述第十三网络设备直接连接,或者所述第十四网络设备与所述第十三网络设备间接连接。
实施本发明实施例,通过利用小区的标识和第五关联表,网络设备的设备标识和第六关联表,以及网络设备的设备标识和第七关联表保证消息传送的准确性。
第六方面,本发明实施例提供了一种系统信息请求消息和响应消息的传输方法,其特征在于,所述方法包括:
第二网络设备接收第一网络设备发送的第一消息,所述第一消息包括系统信息请求消息和小区标识;所述小区标识为所述系统信息请求消息所对应的小区的标识;所述小区标识所对应的小区属于第三网络设备;
所述第二网络设备向所述第一网络设备发送第二消息,所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息;所述第二消息中包含所述小区标识;
其中,所述第一网络设备和所述第三网络设备为同一网络设备,或者所述第一网络设备和所述第三网络设备为不同网络设备。
实施本发明实施例,可以保证正确的接收到第一网络设备发送的第一消息,也能够保证第二消息正确的传送到第一网络设备。
第七方面,本发明实施例提供了一种终端设备,所述终端设备包括:
第一发送单元,用于向网络设备发送媒体接入控制子协议数据单元MAC subPDU;
其中,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;
第一接收单元,用于接收所述网络设备发送的系统信息。
在一个可选的实现方式中,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的逻辑信道标识LCID的值,所述LCID的值用于包括指示所述MAC SDU传输的是请求系统信息的消息。
在一个可选的实现方式中,所述请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
在一个可选的实现方式中,所述LCID的值为第一值时,所述LCID的值指示所述MAC SDU传输的是通过所述CCCH或DCCH传输的请求系统信息的RRC消息。
在一个可选的实现方式中,所述终端设备向网络设备发送MAC subPDU之前,
所述第一接收单元还用于接收所述网络设备发送的第二指示信息,所述第二指示信息用于指示所述网络设备支持所述终端设备使用所述LCID的第一值。
在一个可选的实现方式中,所述第二指示信息包含于所述网络设备广播的主系统信息MIB中,或者包含于所述网络设备广播的系统信息块1SIB1中。
在一个可选的实现方式中,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的预留比特的值,所述预留比特的值指示所述MAC SDU传输的是请求系统信息的消息。
在一个可选的实现方式中,所述预留比特的值为第一值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的请求系统信息的RRC消息;
所述预留比特的值为第二值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的RRC连接建立请求消息,或RRC连接重建立请求消息,或RRC连接恢复消息。
第八方面,本发明实施例提供了一种终端设备,所述终端设备包括:
第一选择单元,用于从第一物理随机接入信道PRACH资源集合中选择PRACH资源;
其中,所述第一PRACH资源集合为所述用户设备发起随机接入过程来请求系统信息时用于发送随机接入前导所使用的PRACH资源的集合;
第二发送单元,用于向网络设备发送随机接入前导;
所述第二发送单元还用于向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU传输的为请求第一系统信息的消息;
第二接收单元,用于接收所述网络设备发送的第一系统信息。
在一个可选的实现方式中,所述终端设备在发送所述随机接入前导前,所述第二接收单元还用于接收所述网络设备发送的第二系统信息,所述第二系统信息中包含所述第一PRACH资源集合。
在一个可选的实现方式中,所述第二系统信息为所述网络设备广播的主系统信息MIB,或者所述网络设备广播的系统信息块1SIB1。
第九方面,本发明实施例提供了一种第一网络设备,所述第一网络设备包括:
第一接收单元,用于接收终端设备发送的媒体接入控制子协议数据单元MAC subPDU;
其中,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;
第一发送单元,用于向第二网络设备发送请求消息,所述请求消息包括所述请求系统信息的消息;
所述第一接收单元还用于接收第二网络设备发送的响应消息;
所述第一发送单元还用于向所述终端设备发送系统信息。
在一个可选的实现方式中,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的逻辑信道标识LCID的值,所述LCID的值用于包括指示所述MAC SDU传输的是请求系统信息的消息。
在一个可选的实现方式中,所述请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
在一个可选的实现方式中,所述LCID的值为第一值时,所述LCID的值指示所述MAC SDU传输的是通过所述CCCH或DCCH传输的请求系统信息的RRC消息。
在一个可选的实现方式中,所述接收终端设备发送的MAC subPDU之前,
所述第一发送单元还用于向所述终端设备发送第二指示信息,所述第二指示信息用于指示所述第一网络设备支持所述终端设备使用所述LCID的第一值。
在一个可选的实现方式中,所述第二指示信息包含于所述网络设备广播的主系统信息MIB中,或者包含于所述网络设备广播的系统信息块1SIB1中。
在一个可选的实现方式中,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的预留比特的值,所述预留比特的值指示所述MAC SDU传输的是请求系统信息的消息。
在一个可选的实现方式中,所述预留比特的值为第一值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的请求系统信息的RRC消息;
所述预留比特的值为第二值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的RRC连接建立请求消息,或RRC连接重建立请求消息,或RRC连接恢复消息。
第十方面,本发明实施例提供了一种第二网络设备,所述第二网络设备包括:
第二接收单元,用于接收第一网络设备发送的请求消息;
其中,所述请求消息是所述第一网络设备根据第一指示信息识别出MAC subPDU用于请求系统信息后,发送的消息,其中,所述MAC subPDU为终端设备发送给所述第一网络设备的,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;
第二发送单元,用于向所述第一网络设备发送响应消息,以使所述第一网络设备向所述终端设备发送系统信息。
第十一方面,本发明实施例提供了一种第一网络设备,所述第一网络设备包括:
第一发送单元,用于向第二网络设备发送第一消息;
其中,所述第一消息包括系统信息请求消息和小区标识,所述小区标识为所述系统信息请求消息所对应的小区的标识,所述小区标识所对应的小区属于第三网络设备;
第一接收单元,用于接收所述第二网络设备发送的第二消息;
其中,所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息,所述第二消息中包含所述小区标识。
在一个可选的实现方式中,所述第一网络设备还包括第一维护单元,所述第一维护单元用于维护第二信息集合,所述第二信息集合包括所述第一网络设备直接管理的小区的标识和第二关联表,所述第一关联表包括第五网络设备的设备标识和所述第五网络设备管理的小区的标识;其中,所述第五网络设备为所述第一网络设备的子节点设备;所述第五网络设备管理的小区的标识包括所述第五网络设备直接管理的小区的标识和所述第五网络设备间接管理的小区的标识。
在一个可选的实现方式中,所述第一维护单元还用于维护第四信息集合,所述第四信息集合包括第八网络设备的设备标识和第四关联表,所述第四关联表包括所述第八网络设备的设备标识和与所述第八网络设备具有连接关系的第九网络设备的设备标识;其中,所述第八网络设备为所述第一网络设备的子节点设备,所述连接关系包括所述第九网络设备与所述第八网络设备直接连接,或者所述第九网络设备与所述第八网络设备间接连接。
在一个可选的实现方式中,所述第一维护单元还用于维护第七信息集合,所述第七信息集合包括第十三网络设备的设备标识第七关联表,所述第七关联表包括所述第十三网络设备的设备标识和与所述第十三网络设备具有连接关系的第十四网络设备的设备标识;其中,所述第十三网络设备为所述第一网络设备的子节点设备,所述连接关系包括所述第十四网络设备与所述第十三网络设备直接连接,或者所述第十四网络设备与所述第十三网络设备间接连接。
第十二方面,本发明实施例提供了一种第二网络设备,所述第二网络设备包括:
第二接收单元,用于接收第一网络设备发送的第一消息;
其中,所述第一消息包括系统信息请求消息和小区标识,所述小区标识为所述系统信息请求消息所对应的小区的标识,所述小区标识所对应的小区属于第三网络设备;
第二发送单元,用于向所述第一网络设备发送第二消息;
其中,所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息,所述第二消息中包含所述小区标识。
在一个可选的实现方式中,所述第二网络还包括第二维护单元,所述第二维护单元用于维护第一信息集合,所述第一信息集合包括所述第二网络设备直接管理的小区的标识和第一关联表,所述第一关联表包括第四网络设备的设备标识和所述第四网络设备管理的小区的标识;其中,所述第四网络设备为所述第二网络设备的子节点设备;所述第四网络设备管理的小区的标识包括所述第四网络设备直接管理的小区的标识和所述第四网络设备间接管理的小区的标识。
在一个可选的实现方式中,所述第二维护单元还用于维护第三信息集合,所述第三信息集合包括第六网络设备的设备标识和第三关联表,所述第三关联表包括所述第六网络设备的设备标识和与所述第六网络设备具有连接关系的第七网络设备的设备标识;其中,所述第六网络设备为所述第二网络设备的子节点设备,所述连接关系包括所述第七网络设备与所述第六网络设备直接连接,或者所述第七网络设备与所述第六网络设备间接连接。
在一个可选的实现方式中,所述第二维护单元还用于维护第五信息集合和第六信息集合;
所述第五信息集合包括第二网络设备直接管理的小区的标识和第五关联表,所述第五关联表包括第 十网络设备的设备标识和所述第十网络设备直接管理的小区的标识;其中,所述第十网络设备与所述第二网络设备具有连接关系,所述连接关系包括所述第十网络设备与所述第二网络设备直接连接,或者所述第十网络设备与所述第二网络设备间接连接;
所述第六信息集合包括第十一网络设备的设备标识和第六关联表,所述第六关联表包括所述第十一网络设备的设备标识和与所述第十一网络设备具有连接关系的第十二网络设备的设备标识;其中,所述第十一网络设备为所述第二网络设备的子节点设备,所述连接关系包括所述第十二网络设备与所述第十一网络设备直接连接,或者所述第十二网络设备与所述第十一网络设备间接连接。
第十三方面,本发明实施例提供了一种终端设备,其特征在于,所述终端设备包括:处理器、存储器和收发器,其中:
所述处理器、所述存储器和所述收发器相互连接,所述存储器用于存储计算机程序,所述计算机程序包括程序指令,所述处理器被配置用于调用所述程序指令,执行以下步骤:
向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;
接收所述网络设备发送的系统信息。
第十四方面,本发明实施例提供了一种终端设备,其特征在于,所述终端设备包括:处理器、存储器和收发器,其中:
所述处理器、所述存储器和所述收发器相互连接,所述存储器用于存储计算机程序,所述计算机程序包括程序指令,所述处理器被配置用于调用所述程序指令,执行以下步骤:
从第一物理随机接入信道PRACH资源集合中选择PRACH资源向网络设备发送随机接入前导;所述第一PRACH资源集合为所述用户设备发起随机接入过程来请求系统信息时用于发送随机接入前导所使用的PRACH资源的集合;
向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU传输的为请求第一系统信息的消息;
接收所述网络设备发送的第一系统信息。
第十五方面,本发明实施例提供了一种第一网络设备,其特征在于,所述第一网络设备包括:处理器、存储器和收发器,其中:
所述处理器、所述存储器和所述收发器相互连接,所述存储器用于存储计算机程序,所述计算机程序包括程序指令,所述处理器被配置用于调用所述程序指令,执行以下步骤:
接收终端设备发送的媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;
向第二网络设备发送请求消息,所述请求消息包括所述请求系统信息的消息;
向所述终端设备发送系统信息。
第十六方面,本发明实施例提供了一种第二网络设备,其特征在于,所述第二网络设备包括:处理器、存储器和收发器,其中:
所述处理器、所述存储器和所述收发器相互连接,所述存储器用于存储计算机程序,所述计算机程序包括程序指令,所述处理器被配置用于调用所述程序指令,执行以下步骤:
接收第一网络设备发送的请求消息,所述请求消息是所述第一网络设备根据第一指示信息识别出MAC subPDU用于请求系统信息后,发送的消息,其中,所述MAC subPDU为终端设备发送给所述第一网络设备的,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信 息指示所述MAC SDU包括请求系统信息的消息;
向所述第一网络设备发送响应消息,以使所述第一网络设备向所述终端设备发送系统信息。
第十七方面,本发明实施例提供了一种第一网络设备,其特征在于,所述第一网络设备包括:处理器、存储器和收发器,其中:
所述处理器、所述存储器和所述收发器相互连接,所述存储器用于存储计算机程序,所述计算机程序包括程序指令,所述处理器被配置用于调用所述程序指令,执行以下步骤:
向第二网络设备发送第一消息;所述第一消息包括系统信息请求消息和小区标识;所述小区标识为所述系统信息请求消息所对应的小区的标识;所述小区标识所对应的小区属于第三网络设备;
接收所述第二网络设备发送的第二消息;所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息;所述第二消息中包含所述小区标识。
第十八方面,本发明实施例提供了一种第二网络设备,所述第二网络设备包括:处理器、存储器和收发器,其中:
所述处理器、所述存储器和所述收发器相互连接,所述存储器用于存储计算机程序,所述计算机程序包括程序指令,所述处理器被配置用于调用所述程序指令,执行以下步骤:
接收第一网络设备发送的第一消息,所述第一消息包括系统信息请求消息和小区标识;所述小区标识为所述系统信息请求消息所对应的小区的标识;所述小区标识所对应的小区属于第三网络设备;
向所述第一网络设备发送第二消息,所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息;所述第二消息中包含所述小区标识。
第十九方面,本发明实施例提供了一种通信系统,包括终端设备、第一网络设备和第二网络设备;所述第一网络设备为第七方面或第八方面,或者第七方面或第八方面的任意一个可选的实现方式所描述的终端设备,所述第一网络设备为第九方面,或者第九方面的任意一个可选的实现方式所描述的第一网络设备,所述第二网络设备为第十方面,或者第十方面的任意一个可选的实现方式所描述的第一网络设备。
第二十方面,本发明实施例提供了一种通信系统,包括第一网络设备以及第二网络设备;所述第一网络设备为第十一方面,或第十一方面的任意一个可选的实现方式所描述的终端设备,所述第二网络设备为第十二方面,或者第十二方面的任意一个可选的实现方式所描述的第二网络设备。
第二十一方面,本发明实施例提供了一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,所述计算机程序包括程序指令,所述程序指令当被终端设备的处理器执行时,使所述终端设备的处理器执行上述第一方面或者第一方面的任意一个可选的实现方式所描述的方法;或者所述程序指令当被第一网络设备的处理器执行时,使所述第一网络设备的处理器执行上述第二方面或者第二方面的任意一个可选的实现方式所描述的方法,或者所述程序指令当被第二网络设备的处理器执行时,使所述第二网络设备的处理器执行上述第三方面或者第三方面的任意一个可选的实现方式所描述的方法。
第二十二方面,本发明实施例提供了一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,所述计算机程序包括程序指令,所述程序指令当被第一网络设备的处理器执行时,使所述第一网络设备的处理器执行上述第五方面或者第五方面的任意一个可选的实现方式所描述的方法,或者所述程序指令当被第二网络设备的处理器执行时,使所述第二网络设备的处理器执行上述第六方面或者第六方面的任意一个可选的实现方式所描述的方法。
实施本发明实施例,可以通过在发送的MAC subPDU中,设置LCID的值或预留比特的值作为第一指示信息,以使第一网络设备可以根据所述第一指示信息识别出MAC SDU传输的为请求系统信息的消息,可以有效避免网络设备错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费,此外,在第 一网络设备发送的第一消息和第二网络设备发送的第二消息中添加小区标识或设备标识,第一网络设备和第二网络设备通过维护所述小区标识和关联表,或所述设备标识和关联表的信息集合,可以保证第一消息或第二消息正确的在第一网络设备和第二网络设备之间进行传输。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍。
图1为一种终端设备向网络请求系统信息的流程示意图;
图2为一种CU-DU分离情况下的5G接入网的系统架构示意图;
图3为用户设备基于CU-DU分离系统请求系统信息的流程示意图;
图4为CU-DU分离系统的控制面协议栈示意图;
图5A为一种单跳中继架构示意图;
图5B为一种多跳中继架构示意图;
图6为本发明实施例提供的一种请求系统信息的指示方法的流程示意图;
图7为本发明实施例提供的一种MAC PDU结构示意图;
图8为本发明实施例提供的一种LCID的值与指示信息的示意图;
图9为本发明实施例提供的一种请求系统信息的指示方法的流程示意图;
图10为本发明实施例提供的一种请求系统信息的指示方法的流程示意图;
图11为本发明实施例提供的一种系统信息请求消息和响应消息的传输方法的流程示意图;
图12为本发明实施例提供的一种路由系统的示意图;
图13为本发明实施例提供的另一种路由系统的示意图;
图14为本发明实施例提供的另一种路由系统的示意图;
图15为本发明实施例提供的一种系统信息请求消息和响应消息的传输方法的流程示意图;
图16为本发明实施例提供的一种终端设备的结构示意图;
图17为本发明实施例提供的另一种终端设备的结构示意图;
图18为本发明实施例提供的一种第一网络设备的结构示意图;
图19为本发明实施例提供的一种第二网络设备的结构示意图;
图20为本发明实施例提供的另一种第一网络设备的结构示意图;
图21为本发明实施例提供的另一种第二网络设备的结构示意图;
图22为本发明实施例提供的另一种终端设备的结构示意图;
图23为本发明实施例提供的另一种终端设备的结构示意图;
图24为本发明实施例提供的另一种第一网络设备的结构示意图;
图25为本发明实施例提供的另一种第二网络设备的结构示意图;
图26为本发明实施例提供的另一种第一网络设备的结构示意图;
图27为本发明实施例提供的另一种第二网络设备的结构示意图。
具体实施方式
下面将结合附图对本发明实施例中的技术方案进行清楚、完整地描述。
在新无线(New Radio,简称NR)技术中,最小系统信息(Minimum System Information,简称MSI)必须广播,而有些系统信息并不是所有用户设备都需要的,对于这部分系统信息,网络不需要一 直周期性广播,而是可以根据用户设备的需求来按需广播。
当某个终端设备需要某种系统信息时,该终端设备向网络发送请求消息,来请求网络广播该系统消息。参见图1,是一种终端设备向网络请求系统信息的流程示意图,如图1所示,终端设备基于物理随机接入信道(Physical Random Access,PRACH)发送随机接入前导,以通知网络其将发送请求按需获取系统信息的请求,在接收到网络发送的随机接入响应后,终端设备发送系统信息请求,在接收到系统信息请求后,响应于该系统信息请求,网络在预留的用于在下行信道广播系统信息的资源中以广播形式发送系统信息响应(当没有终端设备请求系统信息时,该资源也可以用于其它信号传输)。
在5G NR系统中,引入了CU-DU分离技术。即将NR的基站(gNB)从逻辑上分为两个节点,gNB-CU(Central Unit)和gNB-DU(Distributed Unit),一个gNB可以有一个CU和一个或多个DU组成。参见图2,是一种CU-DU分离情况下的5G接入网的系统架构图,CU和DU之间的接口为F1接口,gNB通过通用的用户网络接口(User to Network interface Universal,Uu)与用户设备(User Equipment,UE)相连,通过下一代接口(Next Generation,NG)与5G核心网相连。
当终端设备是UE,网络中包含CU-DU分离的基站,UE需要按需获取的系统信息由CU生成后,发送给DU,UE在请求系统信息时,UE需要通过DU向CU发送系统信息请求消息,然后再通过DU广播来获取系统信息。参见图3,是用户设备基于CU-DU分离系统请求系统信息的流程示意图。基站的CU向DU发送小区的系统信息,DU接收并进行存储,用户设备触发系统信息请求,向基站的DU发送随机接入前导,DU在接收到前导后发送随机接入响应,UE在接收到响应后,发送系统信息请求消息,DU接收到系统信息请求消息后,通过一条F1应用协议(F1-Application Protocol,F1-AP)消息将系统信息请求消息发送给CU,CU在解读后再通过一条F1AP消息将系统信息传送命令消息发送给DU,DU在接收到系统信息传送命令消息后向UE广播系统信息。
基于图2所示的CU-DU分离的系统的控制面协议栈如图4所示,可以看出,DU没有分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)、无线资源控制协议(Radio Resource Control,RRC)和非接入层协议(Non-AccessStratum,NAS),只具有物理层协议(Physical,PHY)、媒体接入控制协议(Medium Access Control,MAC)、无线链路控制协议(Radio Link Control,RLC)、因特网协议(Internet Protocol,IP)、流控制传输协议(Stream Control Transmission Protocol,SCTP)和F1应用协议(F1-Application Protocol,F1-AP)。UE发送的请求系统信息的消息是RRC消息,由于DU没有无线资源控制协议(Radio Resource Control,RRC),不能解码该RRC消息,DU只能根据F1应用协议,通过一条F1AP消息将该RRC消息转发给CU,CU具有无线资源控制协议(Radio Resource Control,RRC),能够解码该RRC消息,在解码该请求系统信息的RRC消息后,根据F1应用协议,通过一条F1AP消息将系统信息传送命令消息发送给DU,通知DU去广播系统信息。
具体的,对于RRC空闲态(RRC_Idle)和RRC去激活态(RRC_Inactive)的UE,在发送系统信息请求消息时,可能通过逻辑信道中的公共控制信道(Common Control Channel,CCCH)来传输该RRC消息,而CCCH同时也用于传输RRC连接建立请求,RRC连接恢复请求,RRC连接重建请求等RRC消息,DU只能根据媒体接入控制协议(Medium Access Control,MAC)识别出UE发送的是CCCH传输的RRC消息,无法解码该RRC消息,不能得知RRC消息的内容,无法区别对待这些消息,而且只会通过同一条消息将该RRC消息转发给CU。此外,DU在做接纳控制时,由于不能正确区分该RRC消息,从而可能会错误的将请求系统信息的UE给拒绝,而且DU都是通过同一条消息转发该RRC消息,可能会包含不必要的信息,造成资源的浪费。因此,需要在UE发送的请求系统信息的RRC消息中添加指示信息,以使DU能够正确的识别出UE发送的RRC消息是用于请求系统信息。
为了增强网络覆盖,提高网络容量,一种有效的方法是在UE和基站之间部署中继节点,在部署了 中继节点的系统架构中,UE通过中继节点与基站相连接。参见图5A和图5B,图5A是一种单跳中继架构示意图,图5B是一种多跳中继架构示意图。当UE需要获取系统信息时,发送系统信息请求消息给中继节点,中继节点将其转发给宿主基站,中继节点在接收到宿主基站发送的系统信息传送命令消息后,向UE广播系统信息。
中继节点和DU类似,没有无线资源控制协议(Radio Resource Control,RRC),不能解码UE发送的RRC消息,中继节点只能根据F1应用协议,通过一条F1AP消息将该RRC消息转发给宿主基站,宿主基站具有无线资源控制协议(Radio Resource Control,RRC),能够解码该RRC消息,在解码该请求系统信息的RRC消息后,根据F1应用协议,通过一条F1AP消息将系统信息传送命令消息发送给中继节点,通知中继节点去广播系统信息。
因此,对于UE通过gNB-DU连接到gNB-CU,并通过gNB-CU连接到核心网的系统(CU-DU分离系统),或者是UE通过中继节点连接到基站,并通过基站连接到核心网的系统(中继系统),都需要在UE发送的请求系统信息的RRC消息中添加指示信息,以使DU或中继节点能够正确的识别出UE发送的RRC消息是用于请求系统信息,从而避免DU或中继节点错误的将请求系统信息的UE给拒绝和造成传输资源的浪费。
接下来将结合图1-5的描述,介绍本发明实施例提供的一种请求系统信息的指示方法。
请参见图6。图6为本发明实施例提供的一种请求系统信息的指示方法的流程示意图,该方法包括但不限于以下步骤:
S101:终端设备向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息。
在一种可能的实现方式中,所述终端设备应用于CU-DU分离系统或中继系统,所述网络设备包括基站分布单元DU,或者所述网络设备包括中继节点。
具体地,终端设备可以是用户设备UE,UE向基站的DU或者中继节点发送MAC subPDU,DU或者中继节点根据MAC subPDU中包含的第一指示信息,识别出MAC SDU传输的为请求系统信息的消息。
具体地,用户设备UE在向DU或者中继节点发送MAC subPDU之前,UE先向DU或者中继节点发送前导码,DU或者中继节点在接收到UE发送的前导码后,向UE发送随机接入响应,提供上行授权。基于所述上行授权,UE再向DU或者中继节点发送包含MAC subPDU的MAC PDU。
在一种可能的实现中,第一指示信息包括所述MAC subPDU包含的MAC子头中的逻辑信道标识LCID的值,所述LCID的值用于包括指示所述MAC SDU传输的是请求系统信息的消息。
具体地,UE可以通过公共控制逻辑信道CCCH传输承载请求系统信息的无线资源控制协议RRC消息。对于上行数据传输,媒体接入控制协议数据单元MAC PDU的格式如图7所示,一个MAC PDU中包含一个或多个MAC subPDU,MAC subPDU有三种类型:传输MAC SDU的MAC subPDU,传输媒体接入控制层协议控制信令(MAC CE)的MAC subPDU和传输附加比特(padding)的MAC subPDU。传输MAC SDU和MAC CE的每个MAC subPDU都包含子头(subheader),其中,子头中的LCID字段用于指示该子头对应的MAC SDU所在的逻辑信道,或者该子头也用于指示对应的MAC CE的类型。
由于DU或者中继节点能够解读MAC subPDU对应的子头信息,所以可以设置MAC子头中的逻辑信道标识LCID的值作为指示信息,DU或者中继节点可以根据MAC子头中的LCID的值确定该MAC子头对应的MAC SDU传输的是请求系统信息的消息。
可以看出,DU或者中继节点即使没有RRC层协议,不能解码MAC SDU传输的RRC消息,但是通过解读MAC subPDU包含的MAC子头中的逻辑信道标识LCID的值,仍可以确定MAC SDU传输的是请求系统信 息的消息,有效避免了DU或者中继节点错误的拒绝终端设备。
在一种可能的实现中,请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
在一种可能的实现中,LCID的值为第一值时,所述LCID的值指示所述MAC SDU传输的是通过所述CCCH或DCCH传输的请求系统信息的RRC消息。
具体地,参见图8,是目前已定义的针对上行传输的LCID的值与MAC SDU所在的逻辑信道或MAC控制信令的类型的对应关系。由图8可知,LCID包括6个比特,当LCID的值是在100001到110110之间的某个值时,目前没有进行定义,属于预留的值,可以通过把LCID设置为100001到110110其中的某一个值,例如110011作为第一值,指示所述经过设置的LCID的值对应的MAC SDU传输的是通过所述CCCH或DCCH传输的请求系统信息的RRC消息。可以理解,也可以设置其它的值进行指示。也可以通过设置LCID的值为第二值时,指示所述MAC子头对应的包含于所述MAC subPDU中的MAC SDU传输的是通过CCCH传输的RRC连接建立请求消息,LCID的值为第三值时,指示所述MAC子头对应的包含于所述MAC subPDU中的MAC SDU传输的是通过CCCH传输的RRC连接重建立请求消息,LCID的值为第四值时,指示所述MAC子头对应的包含于所述MAC subPDU中的MAC SDU传输的是通过CCCH传输的RRC连接恢复消息,其中,所述LCID的第二值,第三值和第四值可以为相同的值,也可以为不同的值。
可以理解,DU或者中继节点在接收到终端设备发送的MAC subPDU,只需要判断MAC subPDU所包含的MAC子头中的LCID的值是否为第一值就可以确定MAC SDU传输的是否为请求系统信息的消息,若LCID的值是第一值,则可以确定MAC SDU传输的是请求系统信息的消息,整个过程实现简单。
在一种可能的实现中,终端设备向网络设备发送MAC subPDU之前,还包括:
所述终端设备接收所述网络设备发送的第二指示信息,所述第二指示信息用于指示所述网络设备支持所述终端设备使用所述LCID的第一值。
可以理解,若网络设备不对LCID的值进行识别,即不能支持终端设备使用LCID的第一值来指示MAC SDU传输的是请求系统信息的消息,终端设备即使发送包含LCID的第一值的MAC subPDU也没有意义,网络设备仍不能确定MAC SDU传输的是请求系统信息的消息。所以网络设备需要预先发送一个指示信息,通知终端设备可以使用LCID的第一值。
在一种可能的实现中,第二指示信息包含于所述网络设备广播的主系统信息MIB中,或者包含于所述网络设备广播的系统信息块1SIB1中。
具体地,MIB和SIB1是网络设备必须广播的信息,终端设备也必须监听,通过在MIB和SIB1包含第二指示信息,可以保证终端设备可靠的接收到所述第二指示信息。
在一种可能的实现中,第一指示信息包括所述MAC subPDU包含的MAC子头中的预留比特的值,所述预留比特的值指示所述MAC SDU传输的是请求系统信息的消息。
具体地,如图7所示,在MAC subPDU包含的MAC子头中,有一个预留比特R,由于DU或者中继节点能够解读MAC subPDU对应的子头信息,所以可以通过设置R的值作为指示信息,DU或者中继节点可以根据R的值确定MAC SDU传输的是请求系统信息的消息。
可以看出,DU或者中继节点即使没有RRC层协议,不能解码MAC SDU传输的RRC消息,但是通过解读MAC subPDU包含的MAC子头中的预留比特R的值,仍可以确定MAC SDU传输的是请求系统信息的消息,有效避免了DU或者中继节点错误的拒绝终端设备。
在一种可能的实现中,请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
在一种可能的实现中,所述预留比特的值为第一值时,指示所述MAC子头对应的MAC SDU传输的是 通过CCCH或者DCCH传输的请求系统信息的RRC消息;
所述预留比特的值为第二值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的RRC连接建立请求消息,或RRC连接重建立请求消息,或RRC连接恢复消息。
具体地,终端设备发送的MAC SDU是请求系统信息的RRC消息,终端设备将所述MAC SDU对应的MAC子头中预留比特R的值设置为第一值,终端设备发送的MAC SDU是RRC连接建立请求消息,或RRC连接重建立请求消息,或RRC连接恢复消息时,终端设备将所述MAC SDU对应的MAC子头中预留比特R的值设置为第二值,其中,第一值取值和第二值取值可以是0或1,即第一值是1时,第二值为0,或者第一值是0时,第二值为1,当然也可以是其它的取值,这里不做限制。
可以理解,DU或者中继节点在接收到终端设备发送的MAC subPDU,只需要判断MAC subPDU所包含的MAC子头中的R的值是否为第一值就可以确定MAC SDU传输的是否为请求系统信息的消息,若R的值是第一值,则可以确定MAC SDU传输的是请求系统信息的消息,整个过程简单可靠。
S102:终端设备接收所述网络设备发送的系统信息。
在一种可能的实现中,终端设备接收所述网络设备发送的系统信息之前,接收网络设备发送的所述系统信息的调度信息,终端设备可以通过接收网络设备广播的主系统信息MIB或者系统信息块1SIB1,从所述MIB或SIB1中获取所述系统信息的调度信息,终端设备再根据所述调度在预设时间接收所述系统信息,从而获取网络设备广播的系统信息。
可以理解,通过接收时序安排信息,在预设时段监听广播信道,获取网络设备广播的系统信息,可以保证终端设备非连续接收,提高了终端设备的接收效率。
请参见图9。图9为本发明实施例提供的一种请求系统信息的指示方法的流程示意图,该方法包括但不限于以下步骤:
S201:第一网络设备接收终端设备发送的媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息。
具体地,第一网络设备可以是基站的DU或者中继节点,用户设备可以是UE,UE向基站的DU或者中继节点发送MAC subPDU,DU或者中继节点根据MAC subPDU中包含的第一指示信息,识别出MAC SDU传输的为请求系统信息的消息。
具体地,用户设备UE在向DU或者中继节点发送MAC subPDU之前,UE先向DU或者中继节点发送前导码,DU或者中继节点在接收到UE发送的前导码后,向UE发送随机接入响应,提供上行授权。基于所述上行授权,UE再向DU或者中继节点发送包含MAC subPDU的MAC PDU。
在一种可能的实现中,第一指示信息包括所述MAC subPDU包含的MAC子头中的逻辑信道标识LCID的值,所述LCID的值用于包括指示所述MAC SDU传输的是请求系统信息的消息。
由于DU或者中继节点能够解读MAC subPDU对应的子头信息,所以可以设置MAC子头中的逻辑信道标识LCID的值作为指示信息,DU或者中继节点可以根据MAC子头中的LCID的值确定该MAC子头对应的MAC SDU传输的是请求系统信息的消息。
可以看出,DU或者中继节点即使没有RRC层协议,不能解码MAC SDU传输的RRC消息,但是通过解读MAC subPDU包含的MAC子头中的逻辑信道标识LCID的值,仍可以确定MAC SDU传输的是请求系统信息的消息,有效避免了DU或者中继节点错误的拒绝终端设备。
在一种可能的实现中,请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
在一种可能的实现中,LCID的值为第一值时,所述LCID的值指示所述MAC SDU传输的是通过所述 CCCH或DCCH传输的请求系统信息的RRC消息。
可以理解,DU或者中继节点在接收到终端设备发送的MAC subPDU,只需要判断MAC subPDU所包含的MAC子头中的LCID的值是否为第一值就可以确定MAC SDU传输的是否为请求系统信息的消息,若LCID的值是第一值,则可以确定MAC SDU传输的是请求系统信息的消息,整个过程实现简单。
在一种可能的实现中,所述第一网络设备接收终端设备发送的MAC subPDU之前,还包括:
所述第一网络设备向所述终端设备发送第二指示信息,所述第二指示信息用于指示所述第一网络设备支持所述终端设备使用所述LCID的第一值。
可以理解,若第一网络设备不对LCID的值进行识别,即不能支持终端设备使用LCID的第一值来指示MAC SDU传输的是请求系统信息的消息,终端设备即使发送包含LCID的第一值的MAC subPDU也没有意义,第一网络设备仍不能确定MAC SDU传输的是请求系统信息的消息。所以第一网络设备需要预先发送一个指示信息,通知终端设备可以使用LCID的第一值。
在一种可能的实现中,第二指示信息包含于所述第一网络设备广播的主系统信息MIB中,或者包含于所述第一网络设备广播的系统信息块1SIB1中。
具体地,MIB和SIB1是网络设备必须广播的信息,终端设备也必须监听,通过在MIB和SIB1包含第二指示信息,可以保证终端设备可靠的接收到所述第二指示信息。
在一种可能的实现中,第一指示信息包括所述MAC subPDU包含的MAC子头中的预留比特的值,所述预留比特的值指示所述MAC SDU传输的是请求系统信息的消息。
具体地,如图7所示,在MAC subPDU包含的MAC子头中,有一个预留比特R,由于DU或者中继节点能够解读MAC subPDU对应的子头信息,所以可以通过设置R的值作为指示信息,DU或者中继节点可以根据R的值确定MAC SDU传输的是请求系统信息的消息。
可以看出,DU或者中继节点即使没有RRC层协议,不能解码MAC SDU传输的RRC消息,但是通过解读MAC subPDU包含的MAC子头中的预留比特R的值,仍可以确定MAC SDU传输的是请求系统信息的消息,有效避免了DU或者中继节点错误的拒绝终端设备。
在一种可能的实现中,请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
在一种可能的实现中,所述预留比特的值为第一值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的请求系统信息的RRC消息;
所述预留比特的值为第二值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的RRC连接建立请求消息,或RRC连接重建立请求消息,或RRC连接恢复消息。
具体地,终端设备发送的MAC SDU是请求系统信息的RRC消息,终端设备将所述MAC SDU对应的MAC子头中预留比特R的值设置为第一值,终端设备发送的MAC SDU是RRC连接建立请求消息,或RRC连接重建立请求消息,或RRC连接恢复消息时,终端设备将所述MAC SDU对应的MAC子头中预留比特R的值设置为第二值,其中,第一值取值和第二值取值可以是0或1,即第一值是1时,第二值为0,或者第一值是0时,第二值为1,当然也可以是其它的取值,这里不做限制。
可以理解,DU或者中继节点在接收到终端设备发送的MAC subPDU,只需要判断MAC subPDU所包含的MAC子头中的R的值是否为第一值就可以确定MAC SDU传输的是否为请求系统信息的消息,若R的值是第一值,则可以确定MAC SDU传输的是请求系统信息的消息,整个过程简单可靠。
S202:所述第一网络设备向第二网络设备发送消息,所述消息包括所述请求系统信息的消息。
具体地,当DU传输请求系统信息的RRC消息给CU时,或者一个中继节点传输请求系统信息的RRC消息给另一个中继节点,或者一个中继节点传输请求系统信息的RRC消息给宿主基站时,都是通过一条 F1AP消息进行传输的。
在一种可能的实现中,定义一条F1AP消息,所述F1AP消息专用于传输请求系统信息的RRC消息。该F1AP消息中包括:该F1AP消息的消息类型;UE请求系统信息的小区的小区识别码(Cell ID),该Cell ID为小区在全球范围内的唯一标识;包含请求系统信息的RRC消息的容器。
在一种可能的实现中,复用现有的F1AP消息,当该F1AP消息传输的是请求系统信息的RRC消息,该F1AP消息中只包括:该F1AP消息的消息类型;UE请求系统信息的小区的小区识别码(Cell ID),该Cell ID为小区在全球范围内的唯一标识;包含请求系统信息的RRC消息的容器;可选的,还可以包括:指示该消息中传输的是请求系统信息的RRC消息的指示信息。
S203:所述第一网络设备向所述终端设备发送系统信息。
具体地,第一网络设备在接收到第二网络设备发送的响应消息之后,再向所述终端设备发送系统信息,其中,响应消息中包括系统信息传送命令,第二网络设备也是通过一条F1AP消息将所述响应消息发送给第一网络设备。
在一种可能的实现中,第一网络设备在向所述终端设备发送系统信息之前,第一网络设备向终端设备发送时序安排信息,终端设备可以通过接收第一网络设备广播的主系统信息MIB或者系统信息块1SIB1,从所述MIB或SIB1中获取时序安排信息,终端设备再根据所述时序安排信息在预设时段监听广播信道,获取第一网络设备广播的系统信息。
可以理解,第一网络设备通过发送时序安排信息,以使终端设备在预设时段监听广播信道,获取网络设备广播的系统信息,可以保证终端设备非连续接收,提高了终端设备的接收效率。
请参见图10。图10为本发明实施例提供的一种请求系统信息的指示方法的流程示意图,该方法包括但不限于以下步骤:
S301:终端设备从第一物理随机接入信道PRACH资源集合中选择PRACH资源向网络设备发送随机接入前导;所述第一PRACH资源集合为所述用户设备发起随机接入过程来请求系统信息时用于发送随机接入前导所使用的PRACH资源的集合。
具体地,所述第一物理随机接入信道PRACH资源集合是DU或者中继节点专为所管理的小区内的UE配置的,不同于一般的PRACH资源。
在一种可能的实现中,UE在发送所述随机接入前导前,接收所述DU或中继节点发送的第一系统信息,所述第一系统信息中包含所述第一PRACH资源集合。
可以看出,UE从第一PRACH资源集合中选择的PRACH资源发送的随机接入前导以便于DU或中继节点进行识别,可以不用增加新的指示信息,实现简单。
在一种可能的实现中,所述第二系统信息为DU或中继节点广播的主系统信息MIB,或者所述网络设备广播的系统信息块1SIB1。
可以看出,DU或中继节点通过主系统信息MIB或者系统信息块1SIB1来传送第二系统信息,不需要再通过其它形式的信息来传送第二系统信息,节约了传输资源。
S302:所述终端设备向网络设备发送媒体接入控制协议数据单元MAC PDU,所述MAC PDU中包含请求第一系统信息的消息。
具体地,由于DU或中继节点根据接收到的UE发送的随机接入前导,可以识别出所述随机接入前导是UE从第一物理随机接入信道PRACH资源集合中选择的PRACH资源,DU或中继节点分配对应的上行资源位置UL grant,并通过RAR消息将所述UL grant发送给UE,之后DU或中继节点可以通过从该UL grant接收到的UE发送的RRC消息确认是请求系统信息的消息。
S303:所述终端设备接收所述网络设备发送的第一系统信息。
在一种可能的实现中,终端设备接收所述网络设备发送的系统信息之前,接收网络设备发送的所述系统信息的调度信息,终端设备可以通过接收网络设备广播的主系统信息MIB或者系统信息块1SIB1,从所述MIB或SIB1中获取所述调度信息,终端设备再根据所述调度在预设时间接收所述系统信息,从而获取网络设备广播的系统信息。
可以理解,通过接收调度信息,根据所述调度在预设时间接收所述系统信息,从而获取网络设备广播的系统信息,可以保证终端设备非连续接收,提高了终端设备的接收效率。
请参见图11。图11为本发明实施例提供的一种系统信息请求消息和响应消息的传输方法的流程示意图,该方法包括但不限于以下步骤:
S401:第一网络设备向第二网络设备发送第一消息;所述第一消息包括系统信息请求消息和小区标识;所述小区标识为所述系统信息请求消息所对应的小区的标识;所述小区标识所对应的小区属于第三网络设备。
S402:所述第一网络设备接收所述第二网络设备发送的第二消息;所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息;所述第二消息中包含所述小区标识;其中,所述第一网络设备和所述第三网络设备为同一网络设备,或者所述第一网络设备和所述第三网络设备为不同网络设备。
具体地,第一网络设备可以是中继节点,第二网络设备可以是另一中继节点或宿主基站。若第一网络设备和所述第三网络设备为同一网络设备,则表示第一网络设备没有子节点设备,若第一网络设备和所述第三网络设备为不同网络设备,则表明第一网络设备存在子节点设备。
具体地,第一消息和第二消息可以是F1AP消息,系统信息请求消息是RRC消息。
具体地,第三网络设备可以管理一个或多个小区,第一消息中的小区标识可以是第三网络设备下的其中一个请求系统信息的UE所在的小区的小区标识。
在一种可能的实现中,所述第二网络设备维护有第一信息集合,所述第一信息集合包括所述第二网络设备直接管理的小区的标识和第一关联表,所述第一关联表包括第四网络设备的设备标识和所述第四网络设备管理的小区的标识;其中,所述第四网络设备为所述第二网络设备的子节点设备;所述第四网络设备管理的小区的标识包括所述第四网络设备直接管理的小区的标识和所述第四网络设备间接管理的小区的标识;
所述第一网络设备维护有第二信息集合,所述第二信息集合包括所述第一网络设备直接管理的小区的标识和第二关联表,所述第一关联表包括第五网络设备的设备标识和所述第五网络设备管理的小区的标识;其中,所述第五网络设备为所述第一网络设备的子节点设备;所述第五网络设备管理的小区的标识包括所述第五网络设备直接管理的小区的标识和所述第五网络设备间接管理的小区的标识。
具体地,参见图12,如图12所示,包括宿主基站(DgNB),中继节点1到中继节点7(RN1-RN7)。DgNB直接管理的小区是小区18(CGI18)、小区19(CGI19)、小区20(CGI20),DgNB的子节点设备包括RN1和RN2,RN1直接管理的小区是小区16(CGI16)和小区17(CGI17),RN2直接管理的小区是小区13(CGI13)、小区14(CGI14)和小区15(CGI15);RN1的子节点设备包括RN3和RN4,RN2的子节点设备包括RN5,RN3直接管理的小区是小区6(CGI6)、小区7(CGI7)和小区8(CGI8),RN4直接管理的小区是小区9(CGI9)和小区10(CGI10),RN5直接管理的小区是小区11(CGI11)和小区12(CGI12);RN3和RN5没有子节点设备,RN4的子节点设备包括RN6和RN7,RN6直接管理的小区是小区1(CGI1)和小区2(CGI2),RN7直接管理的小区是小区3(CGI3)、小区4(CGI4)和小区5(CGI5),RN6和RN7没有子节点设备。
对于DgNB来说,它的关联表的内容应该是:CGI1,CGI2,CGI3,CGI4,CGI5,CGI6,CGI7,CGI8, CGI9,CGI10,CGI16,CGI17属于RN1;CGI11,CGI12,CGI13,CGI14,CGI15属于RN2。所以DgNB维护的信息集合中包含的信息是:CGI1,CGI2,CGI3,CGI4,CGI5,CGI6,CGI7,CGI8,CGI9,CGI10,CGI16,CGI17属于RN1;CGI11,CGI12,CGI13,CGI14,CGI15属于RN2;CGI18,CGI19,CGI20。
类似的,可以得到RN1维护的信息集合中包含的信息是:CGI1,CGI2,CGI3,CGI4,CGI5属于RN4;CGI6,CGI7,CGI8属于RN5;CGI16,CGI17。RN2维护的信息集合中包含的信息是:CGI11,CGI12属于RN5;CGI13,CGI14,CGI15。RN3维护的信息集合中包含的信息是:CGI6,CGI7,CGI8。RN4维护的信息集合中包含的信息是:CGI1,CGI2属于RN6;CGI3,CGI4,CGI5属于RN7。RN5维护的信息集合中包含的信息是:CGI11,CGI12。RN6维护的信息集合中包含的信息是:CGI1,CGI2。RN7维护的信息集合中包含的信息是:CGI3,CGI4,CGI5。
具体地,第一信息集合中的信息和第二集合中的信息可以是在子中继节点建立连接或者子中继节点更新管理的小区时,由中继节点通知父中继节点或宿主基站记录或者更新。例如,RN7与RN4建立连接时,RN7通知RN4其管理的小区包括CGI3,CGI4,CGI5,RN4在接收到通知消息后,在其维护的信息集合中添加CGI3,CGI4,CGI5属于RN7的信息并通知RN1其管理的小区增加了CGI3,CGI4,CGI5,RN1接收到该通知消息后,在其维护的信息集合中添加CGI3,CGI4,CGI5属于RN4的信息并通知DgNB,其管理的小区增加了CGI3,CGI4,CGI5,DgNB接收到该通知消息后,在其维护的信息集合中添加CGI3,CGI4,CGI5属于RN1的信息,至此,整个更新过程完成。
可以看出,基于第一信息集合和第二信息集合,中继节点发送的包含系统信息请求消息的第一消息以及宿主基站发送的第二消息,通过包含UE请求系统信息的小区的CGI,就可以进行正确的路由,从而避免在系统信息请求消息和系统信息响应消息中增加额外的信息。
在一种可能的实现中,所述第一消息中包含所述第三网络设备的设备标识,所述第二消息中包含所述第三网络设备的设备标识,所述第二网络设备维护有第三信息集合,所述第三信息集合包括第六网络设备的设备标识和第三关联表,所述第三关联表包括所述第六网络设备的设备标识以及与所述第六网络设备具有连接关系的第七网络设备的设备标识;其中,所述第六网络设备为所述第二网络设备的子节点设备,所述连接关系包括所述第七网络设备与所述第六网络设备直接连接,或者所述第七网络设备与所述第六网络设备间接连接;
所述第一网络设备维护有第四信息集合,所述第四信息集合包括第八网络设备的设备标识和第四关联表,所述第四关联表包括所述第八网络设备的设备标识和与所述第八网络设备具有连接关系的第九网络设备的设备标识;其中,所述第八网络设备为所述第一网络设备的子节点设备,所述连接关系包括所述第九网络设备与所述第八网络设备直接连接,或者所述第九网络设备与所述第八网络设备间接连接。
具体地,参见图13,如图13所示,包括宿主基站(DgNB),中继节点1到中继节点7(RN1-RN7)。DgNB的子节点设备是RN1和RN2,RN1的子节点设备是RN3和RN4,RN2的子节点设备是RN5,RN3和RN5没有子节点设备,RN4的子节点设备是RN6和RN7,RN6和RN7没有子节点设备。
对于DgNB来说,它的关联表的内容应该是:RN3,RN4,RN6,RN7属于RN1;RN5属于RN2。所以DgNB维护的信息集合中包含的信息是:RN3,RN4,RN6,RN7属于RN1;RN5属于RN2,RN1和RN2。
类似的,可以得到RN1维护的信息集合中包含的信息是:RN6,RN7属于RN4;RN3和RN4。RN2维护的信息集合中包含的信息是:RN5。RN4维护的信息集合中包含的信息是:RN6和RN7。
具体地,第三信息集合中的信息和第四集合中的信息可以是在子中继节点建立连接或者子中继节点更新连接时,由子中继节点通知父中继节点或宿主基站记录或者更新。例如,RN7与RN4建立连接时,RN4在其维护的信息集合中添加直接连接的中继节点(子节点)是RN7的信息并通知RN1其连接的中继节点增加了RN7,RN1接收到该通知消息后,在其维护的信息集合中添加RN4连接的中继节点包括RN7 的信息并通知DgNB其连接的中继节点增加了RN7,DgNB在接收到该通知消息后,在其维护的信息集合中添加RN1连接的中继节点包括RN7,至此,整个更新过程完成。
可以看出,在中继节点发送的包含系统信息请求消息的第一消息以及宿主基站发送的第二消息中,通过包含UE请求系统信息的小区的CGI和该小区所属的中继节点的标识,例如RN7下的一个UE请求了CGI1的系统信息,那么RN7发送的第一消息包含CGI1和RN7,同样DgNB发送的第二消息中也包括CGI1和RN7,就可以利用中继节点的标识来进行正确的路由,这种方法的优势是减少了中继节点和宿主基站存储的信息量。
在一种可能的实现中,所述第二消息中包含所述第三网络设备的设备标识,所述第二网络设备为宿主基站,所述第一网络设备为中继节点;
所述第二网络设备维护有第五信息集合和第六信息集合;
所述第五信息集合包括第二网络设备直接管理的小区的标识和第五关联表,所述第五关联表包括第十网络设备的设备标识和所述第十网络设备直接管理的小区的标识;其中,所述第十网络设备与所述第二网络设备具有连接关系,所述连接关系包括所述第十网络设备与所述第二网络设备直接连接,或者所述第十网络设备与所述第二网络设备间接连接;
所述第六信息集合包括第十一网络设备的设备标识和第六关联表,所述第六关联表包括所述第十一网络设备的设备标识和与所述第十一网络设备具有连接关系的第十二网络设备的设备标识;其中,所述第十一网络设备为所述第二网络设备的子节点设备,所述连接关系包括所述第十二网络设备与所述第十一网络设备直接连接,或者所述第十二网络设备与所述第十一网络设备间接连接;
所述第一网络设备维护有第七信息集合,所述第七信息集合包括第十三网络设备的设备标识第七关联表,所述第七关联表包括所述第十三网络设备的设备标识和与所述第十三网络设备具有连接关系的第十四网络设备的设备标识;其中,所述第十三网络设备为所述第一网络设备的子节点设备,所述连接关系包括所述第十四网络设备与所述第十三网络设备直接连接,或者所述第十四网络设备与所述第十三网络设备间接连接。
具体地,参见图14,如图14所示,包括宿主基站(DgNB),中继节点1到中继节点7(RN1-RN7)。因为所有的中继节点都与DgNB直接或间接连接,所以DgNB维护的第五集合中包含的信息是:CGI1,CGI2属于RN6;CGI3,CGI4,CGI5属于RN7;CGI6,CGI7,CGI8属于RN3;CGI9,CGI10属于RN4;CGI11,CGI12属于RN5;CGI13,CGI14,CGI15属于RN2;CGI16,CGI17属于RN1;CGI18,CGI19,CGI20。
DgNB的子节点设备是RN1和RN2,RN1的子节点设备是RN3和RN4,RN2的子节点设备是RN5,RN3和RN5没有子节点设备,RN4的子节点设备是RN6和RN7,RN6和RN7没有子节点设备。
对于DgNB来说,它的第六关联表的内容应该是:RN3,RN4,RN6,RN7属于RN1;RN5属于RN2。所以DgNB维护的第六信息集合中包含的信息是:RN3,RN4,RN6,RN7属于RN1;RN5属于RN2,RN1和RN2。
类似的,可以得到RN1维护的第七信息集合中包含的信息是:RN6,RN7属于RN4;RN3和RN4。RN2维护的第七信息集合中包含的信息是:RN5。RN4维护的第七信息集合中包含的信息是:RN6和RN7。
具体地,第三信息集合中的信息和第四集合中的信息可以是在子中继节点建立连接或者子中继节点更新连接时,由子中继节点通知父中继节点或宿主基站记录或者更新。例如,RN7与RN4建立连接时,RN4在其维护的信息集合中添加直接连接的中继节点(子节点)是RN7的信息并通知RN1其连接的中继节点增加了RN7,RN1接收到该通知消息后,在其维护的信息集合中添加RN4连接的中继节点包括RN7的信息并通知DgNB其连接的中继节点增加了RN7,DgNB在接收到该通知消息后,在其维护的信息集合 中添加RN1连接的中继节点包括RN7,至此,整个更新过程完成
可以看出,DgNB比中继节点多维护了一个包含CGI的信息集合,其维护的信息集合中包含了CGI和中继节点标识的对应关系,因此在中继节点发送的第一消息中,只需要包含UE请求系统信息的小区的CGI,而由于每个中继节点的信息集合中只包括了其直接或间接连接的中继节点的标识,因此,在DgNB发送的第二消息中,除了包含UE请求系统信息的小区的CGI外,还需要包括该小区所属的中继节点的标识才可以进行正确的路由,保证消息传输的可靠性。例如RN7下的一个UE请求了CGI1的系统信息,RN7发送的第一消息中只需要包含CGI1,而在DgNB发送的第二消息中,除了包含CGI1外,还需要包含RN7。
请参见图15。图15为本发明实施例提供的一种系统信息请求消息和响应消息的传输方法的流程示意图,该方法包括但不限于以下步骤:
S501:第二网络设备接收第一网络设备发送的第一消息,所述第一消息包括系统信息请求消息和小区标识;所述小区标识为所述系统信息请求消息所对应的小区的标识;所述小区标识所对应的小区属于第三网络设备。
S502:所述第二网络设备向所述第一网络设备发送第二消息,所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息;所述第二消息中包含所述小区标识;其中,所述第一网络设备和所述第三网络设备为同一网络设备,或者所述第一网络设备和所述第三网络设备为不同网络设备。
具体地,与上述S401和S402类似,在此不再赘述。
上述详细阐述了本发明实施例的方法,下面为了便于更好地实施本发明实施例的上述方案,相应地,下面还提供用于配合实施上述方案的相关装置。
请参见图16。图16为本发明实施例提供的一种终端设备的结构示意图。如图16所示,终端设备10至少可以包括:第一发送单元110、第一接收单元120;其中:
第一发送单元110,用于向网络设备发送媒体接入控制子协议数据单元MAC subPDU;
其中,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息。
第一接收单元120,用于接收所述网络设备发送的系统信息。
在一个可选的实施例中,所述终端设备向网络设备发送MAC subPDU之前,
所述第一接收单元120还用于接收所述网络设备发送的第二指示信息,所述第二指示信息用于指示所述网络设备支持所述终端设备使用所述LCID的第一值。
可理解的是,本实施例的终端设备10的各功能模块的功能可根据上述方法实施例中的方法具体实现,此处不再赘述。
实施本发明实施例,通过向网络设备发送媒体接入控制子协议数据单元MAC subPDU,MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,以使网络设备可以根据所述第一指示信息识别出MAC SDU传输的为请求系统信息的消息,可以有效避免网络设备错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
请参见图17。图17为本发明实施例提供的一种终端设备的结构示意图。如图17所示,终端设备20至少可以包括:第一选择单元210、第二发送单元220、第二接收单元230;其中:
第一选择单元210,用于从第一物理随机接入信道PRACH资源集合中选择PRACH资源;
其中,所述第一PRACH资源集合为所述用户设备发起随机接入过程来请求系统信息时用于发送随机接入前导所使用的PRACH资源的集合。
第二发送单元220,用于向网络设备发送随机接入前导;所述第二发送单元220还用于向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU传输的为请求第一系统信息的消息。
第二接收单元230,用于接收所述网络设备发送的第一系统信息。
在一个可选的实施例中,所述终端设备在发送所述随机接入前导前,所述第二接收单元230还用于接收所述网络设备发送的第二系统信息,所述第二系统信息中包含所述第一PRACH资源集合。
实施本发明实施例,可以根据接收到的终端设备从第一PRACH资源集合中选择的PRACH资源发送的随机接入前导,识别出终端设备发送的MAC subPDU传输的为请求第一系统信息的消息,可以有效避免网络设备错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
请参见图18。图18为本发明实施例提供的一种第一网络设备的结构示意图。如图18所示,第一网络设备30至少可以包括:第一接收单元310、第一发送单元320;其中:
第一接收单元310,用于接收终端设备发送的媒体接入控制子协议数据单元MAC subPDU;
其中,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息。
第一发送单元320,用于向第二网络设备发送请求消息,所述请求消息包括所述请求系统信息的消息。
所述第一接收单元310还用于接收第二网络设备发送的响应消息,所述第一发送单元320还用于向所述终端设备发送系统信息。
在一个可选的实施例中,所述接收终端设备发送的MAC subPDU之前,所述第一发送单元320还用于向所述终端设备发送第二指示信息,所述第二指示信息用于指示所述第一网络设备支持所述终端设备使用所述LCID的第一值。
实施本发明实施例,可以根据接收到的终端设备发送的包括第一指示信息和媒体接入控制业务数据单元MAC SDU,通过第一指示信息识别出所述MAC SDU传输的是用于请求系统信息的消息,可以有效避免第一网络设备错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
请参见图19。图19为本发明实施例提供的一种第二网络设备的结构示意图。如图19所示,第二网络设备40至少可以包括:第二接收单元410、第二发送单元420;其中:
第二接收单元410,用于接收第一网络设备发送的请求消息,
其中,所述请求消息是所述第一网络设备根据第一指示信息识别出MAC subPDU用于请求系统信息后,发送的消息,其中,所述MAC subPDU为终端设备发送给所述第一网络设备的,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息。
第二发送单元420,用于向所述第一网络设备发送响应消息,以使所述第一网络设备向所述终端设备发送系统信息。
实施本发明实施例,通过接收第一网络设备根据第一指示信息识别出所述MAC SDU包括请求系统信息的消息后,发送的请求消息,可以有效的避免错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
请参见图20。图20为本发明实施例提供的一种第一网络设备的结构示意图。如图20所示,第一网络设备50至少可以包括:第一发送单元510、第一接收单元520;其中:
第一发送单元510,用于向第二网络设备发送第一消息;
其中,所述第一消息包括系统信息请求消息和小区标识,所述小区标识为所述系统信息请求消息所对应的小区的标识,所述小区标识所对应的小区属于第三网络设备。
第一接收单元520,用于接收所述第二网络设备发送的第二消息;
其中,所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息,所述第二消息中包含所述小区标识。
在一个可选的实施例中,所述第一网络设备还包括第一维护单元530,所述第一维护单元530用于维护第二信息集合,所述第二信息集合包括所述第一网络设备直接管理的小区的标识和第二关联表,所述第一关联表包括第五网络设备的设备标识和所述第五网络设备管理的小区的标识;其中,所述第五网络设备为所述第一网络设备的子节点设备;所述第五网络设备管理的小区的标识包括所述第五网络设备直接管理的小区的标识和所述第五网络设备间接管理的小区的标识。
实施本发明实施例,可以保证第一消息正确的传送到第二网络设备,也能够保证正确的接收到第二网络设备发送的第二消息。
请参见图21。图21为本发明实施例提供的一种第二网络设备的结构示意图。如图21所示,第二网络设备60至少可以包括:第二接收单元610、第二发送单元620;其中:
第二接收单元610,用于接收第一网络设备发送的第一消息;
其中,所述第一消息包括系统信息请求消息和小区标识,所述小区标识为所述系统信息请求消息所对应的小区的标识,所述小区标识所对应的小区属于第三网络设备。
第二发送单元620,用于向所述第一网络设备发送第二消息;
其中,所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息,所述第二消息中包含所述小区标识。
在一个可选的实施例中,所述第二网络还包括第二维护单元630,所述第二维护单元630用于维护第一信息集合,所述第一信息集合包括所述第二网络设备直接管理的小区的标识和第一关联表,所述第一关联表包括第四网络设备的设备标识和所述第四网络设备管理的小区的标识;其中,所述第四网络设备为所述第二网络设备的子节点设备;所述第四网络设备管理的小区的标识包括所述第四网络设备直接管理的小区的标识和所述第四网络设备间接管理的小区的标识。
实施本发明实施例,可以保证正确的接收到第一网络设备发送的第一消息,也能够保证第二消息正确的传送到第一网络设备。
请参见图22,图22是本发明实施例提供的一种终端设备100,该终端设备100包括处理器101、存储器102和收发器103,该处理器101、存储器102和收发器103通过总线104相互连接。
存储器102包括但不限于是随机存取存储器(Random Access Memory,RAM)、只读存储器(Read-Only Memory,ROM)或可擦除可编程只读存储器(Erasable Programmable Read-Only Mmory,EPROM或者快闪存储器),该存储器102用于相关指令及数据。
该收发器103可以包括一个接收器和一个发送器,例如,无线射频模块,以下描述的处理器101接收或者发送某个消息,具体可以理解为该处理器101通过该收发器来接收或者发送。
处理器101可以是一个或多个中央处理器(Central Processing Unit,CPU),在处理器101是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。
该终端设备100中的处理器101用于读取该存储器102中存储的程序代码,执行以下操作:
处理器101通过收发器103向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息。
处理器101通过收发器103接收所述网络设备发送的系统信息。
需要说明的是,各个操作的具体实现还可根据上述方法实施例中的方法具体实现,此处不再赘述。
实施本发明实施例,通过向网络设备发送媒体接入控制子协议数据单元MAC subPDU,MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,以使网络设备可以根据所述第一指示信息识别出MAC SDU传输的为请求系统信息的消息,可以有效避免网络设备错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
请参见图23,图23是本发明实施例提供的一种终端设备200,该终端设备200包括处理器201、存储器202和收发器203,该处理器201、存储器202和收发器203通过总线204相互连接。
存储器202包括但不限于是随机存取存储器(Random Access Memory,RAM)、只读存储器(Read-Only Memory,ROM)或可擦除可编程只读存储器(Erasable Programmable Read-Only Mmory,EPROM或者快闪存储器),该存储器202用于相关指令及数据。
该收发器203可以包括一个接收器和一个发送器,例如,无线射频模块,以下描述的处理器201接收或者发送某个消息,具体可以理解为该处理器201通过该收发器来接收或者发送。
处理器201可以是一个或多个中央处理器(Central Processing Unit,CPU),在处理器201是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。
该终端设备200中的处理器201用于读取该存储器202中存储的程序代码,执行以下操作:
处理器201通过收发器203从第一物理随机接入信道PRACH资源集合中选择PRACH资源向网络设备发送随机接入前导;所述第一PRACH资源集合为所述用户设备发起随机接入过程来请求系统信息时用于发送随机接入前导所使用的PRACH资源的集合。
处理器201通过收发器203向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU传输的为请求第一系统信息的消息。
处理器201通过收发器203接收接收所述网络设备发送的第一系统信息。
需要说明的是,各个操作的具体实现还可根据上述方法实施例中的方法具体实现,此处不再赘述。
实施本发明实施例,可以根据接收到的终端设备从第一PRACH资源集合中选择的PRACH资源发送的随机接入前导,识别出终端设备发送的MAC subPDU传输的为请求第一系统信息的消息,可以有效避免网络设备错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
请参见图24,图24是本发明实施例提供的一种第一网络设备300,该第一网络设备300包括处理器301、存储器302和收发器303,该处理器301、存储器302和收发器303通过总线304相互连接。
存储器302包括但不限于是随机存取存储器(Random Access Memory,RAM)、只读存储器(Read-Only Memory,ROM)或可擦除可编程只读存储器(Erasable Programmable Read-Only Mmory,EPROM或者快闪存储器),该存储器302用于相关指令及数据。
该收发器303可以包括一个接收器和一个发送器,例如,无线射频模块,以下描述的处理器301接收或者发送某个消息,具体可以理解为该处理器301通过该收发器来接收或者发送。
处理器301可以是一个或多个中央处理器(Central Processing Unit,CPU),在处理器301是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。
该终端设备300中的处理器301用于读取该存储器302中存储的程序代码,执行以下操作:
处理器301通过收发器303接收终端设备发送的媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息。
处理器301通过收发器303向第二网络设备发送请求消息,所述请求消息包括所述请求系统信息的消息。
处理器301通过收发器303向所述终端设备发送系统信息。
需要说明的是,各个操作的具体实现还可根据上述方法实施例中的方法具体实现,此处不再赘述。
实施本发明实施例,可以根据接收到的终端设备发送的包括第一指示信息和媒体接入控制业务数据单元MAC SDU,通过第一指示信息识别出所述MAC SDU传输的是用于请求系统信息的消息,可以有效避免第一网络设备错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
请参见图25,图25是本发明实施例提供的一种第二网络设备400,该第二网络设备400包括处理器401、存储器402和收发器403,该处理器401、存储器402和收发器403通过总线404相互连接。
存储器402包括但不限于是随机存取存储器(Random Access Memory,RAM)、只读存储器(Read-Only Memory,ROM)或可擦除可编程只读存储器(Erasable Programmable Read-Only Mmory,EPROM或者快闪存储器),该存储器402用于相关指令及数据。
该收发器403可以包括一个接收器和一个发送器,例如,无线射频模块,以下描述的处理器401接收或者发送某个消息,具体可以理解为该处理器401通过该收发器来接收或者发送。
处理器401可以是一个或多个中央处理器(Central Processing Unit,CPU),在处理器401是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。
该终端设备400中的处理器401用于读取该存储器402中存储的程序代码,执行以下操作:
处理器401通过收发器403接收第一网络设备发送的请求消息,所述请求消息是所述第一网络设备根据第一指示信息识别出MAC subPDU用于请求系统信息后,发送的消息,其中,所述MAC subPDU为终端设备发送给所述第一网络设备的,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息。
处理器401通过收发器403向所述第一网络设备发送响应消息,以使所述第一网络设备向所述终端设备发送系统信息。
需要说明的是,各个操作的具体实现还可根据上述方法实施例中的方法具体实现,此处不再赘述。
实施本发明实施例,通过接收第一网络设备根据第一指示信息识别出所述MAC SDU包括请求系统信息的消息后,发送的请求消息,可以有效的避免错误的拒绝终端设备的系统信息请求,还可以避免传输资源的浪费。
请参见图26,图26是本发明实施例提供的一种第一网络设备500,该第一网络设备500包括处理器501、存储器502和收发器503,该处理器501、存储器502和收发器503通过总线504相互连接。
存储器502包括但不限于是随机存取存储器(Random Access Memory,RAM)、只读存储器(Read-Only Memory,ROM)或可擦除可编程只读存储器(Erasable Programmable Read-Only Mmory,EPROM或者快闪存储器),该存储器502用于相关指令及数据。
该收发器503可以包括一个接收器和一个发送器,例如,无线射频模块,以下描述的处理器501接收或者发送某个消息,具体可以理解为该处理器501通过该收发器来接收或者发送。
处理器501可以是一个或多个中央处理器(Central Processing Unit,CPU),在处理器501是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。
该终端设备500中的处理器501用于读取该存储器502中存储的程序代码,执行以下操作:
处理器501通过收发器503向第二网络设备发送第一消息;所述第一消息包括系统信息请求消息和小区标识;所述小区标识为所述系统信息请求消息所对应的小区的标识;所述小区标识所对应的小区属于第三网络设备。
处理器501通过收发器503接收所述第二网络设备发送的第二消息;所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息;所述第二消息中包含所述小区标识。
需要说明的是,各个操作的具体实现还可根据上述方法实施例中的方法具体实现,此处不再赘述。
实施本发明实施例,可以保证第一消息正确的传送到第二网络设备,也能够保证正确的接收到第二网络设备发送的第二消息。
请参见图27,图27是本发明实施例提供的一种第二网络设备600,该第二网络设备600包括处理器601、存储器602和收发器603,该处理器601、存储器602和收发器603通过总线604相互连接。
存储器602包括但不限于是随机存取存储器(Random Access Memory,RAM)、只读存储器(Read-Only Memory,ROM)或可擦除可编程只读存储器(Erasable Programmable Read-Only Mmory,EPROM或者快闪存储器),该存储器602用于相关指令及数据。
该收发器603可以包括一个接收器和一个发送器,例如,无线射频模块,以下描述的处理器601接收或者发送某个消息,具体可以理解为该处理器401通过该收发器来接收或者发送。
处理器601可以是一个或多个中央处理器(Central Processing Unit,CPU),在处理器601是一个CPU的情况下,该CPU可以是单核CPU,也可以是多核CPU。
该终端设备600中的处理器601用于读取该存储器602中存储的程序代码,执行以下操作:
处理器601通过收发器603接收第一网络设备发送的第一消息,所述第一消息包括系统信息请求消息和小区标识;所述小区标识为所述系统信息请求消息所对应的小区的标识;所述小区标识所对应的小区属于第三网络设备
处理器401通过收发器403向所述第一网络设备发送第二消息,所述第二消息指示所述第三网络设备发送所述系统信息请求消息所对应的小区的系统信息;所述第二消息中包含所述小区标识。
需要说明的是,各个操作的具体实现还可根据上述方法实施例中的方法具体实现,此处不再赘述。
实施本发明实施例,可以保证正确的接收到第一网络设备发送的第一消息,也能够保证第二消息正确的传送到第一网络设备。
在本发明的另一实施例中提供一种计算机可读存储介质,上述计算机可读存储介质存储有计算机程序,上述计算机程序包括程序指令,上述程序指令被处理器执行时实现:第一网络设备接收终端设备发送的媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;所述第一网络设备向第二网络设备发送请求消息,所述请求消息包括所述请求系统信息的消息;所述第一网络设备向所述终端设备发送系统信息。
上述计算机可读存储介质可以是前述任一实施例上述的终端设备、第一网络设备或第二网络设备的内部存储单元,例如第一网络设备或第二网络设备的硬盘或内存。上述计算机可读存储介质也可以是上述第一网络设备或第二网络设备的外部存储设备,例如上述第一网络设备或第二网络设备上配备的插接式硬盘,智能存储卡(Smart Media Card,SMC),安全数字(Secure Digital,SD)卡,闪存卡(Flash Card)等。进一步地,上述计算机可读存储介质还可以既包括上述第一网络设备或第二网络设备的内部存储单元也包括外部存储设备。上述计算机可读存储介质用于存储上述计算机程序以及上述第一网络设备或第二网络设备所需的其他程序和数据。上述计算机可读存储介质还可以用于暂时地存储已经输出或者将要输出的数据。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程,可通过计算机程序来指令相关的硬件来完成,该的程序可存储于计算机可读取存储介质中,该程序在执行时,可包括如上述各方法的实施例的流程。而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可存储程序代码的介质。
本发明实施例方法中的步骤可以根据实际需要进行顺序调整、合并和删减。
本发明实施例装置中的模块可以根据实际需要进行合并、划分和删减。
以上所述,以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发 明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (21)

  1. 一种请求系统信息的指示方法,其特征在于,所述方法包括:
    终端设备向网络设备发送媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;
    所述终端设备获取所述网络设备发送的系统信息。
  2. 如权利要求1所述的方法,其特征在于,所述终端设备应用于中心单元和分布单元CU-DU分离系统或中继系统,所述网络设备包括基站分布单元DU,或者所述网络设备包括中继节点。
  3. 如权利要求1所述的方法,其特征在于,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的逻辑信道标识LCID的值。
  4. 如权利要求3所述的方法,其特征在于,所述请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
  5. 如权利要求3或4所述的方法,其特征在于,所述LCID的值为第一值时,所述LCID的值指示所述MAC SDU传输的是通过所述CCCH或DCCH传输的请求系统信息的RRC消息。
  6. 如权利要求5所述的方法,其特征在于,所述终端设备向网络设备发送MAC subPDU之前,所述方法还包括:
    所述终端设备接收所述网络设备发送的第二指示信息,所述第二指示信息用于指示所述网络设备支持所述终端设备使用所述LCID的第一值。
  7. 如权利要求6所述的方法,其特征在于,所述第二指示信息包含于所述网络设备广播的主系统信息MIB中,或者包含于所述网络设备广播的系统信息块1SIB1中。
  8. 如权利要求1或2所述的方法,其特征在于,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的预留比特的值,所述预留比特的值指示所述MAC SDU传输的是请求系统信息的消息。
  9. 如权利要求8所述的方法,其特征在于,所述请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
  10. 如权利要求8所述的方法,其特征在于,
    所述预留比特的值为第一值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的请求系统信息的RRC消息;
    所述预留比特的值为第二值时,指示所述MAC子头对应的MAC SDU传输的是通过CCCH或者DCCH传输的RRC连接建立请求消息,或RRC连接重建立请求消息,或RRC连接恢复消息。
  11. 一种请求系统信息的指示方法,其特征在于,所述方法包括:
    第一网络设备接收终端设备发送的媒体接入控制子协议数据单元MAC subPDU,所述MAC subPDU包括第一指示信息和媒体接入控制业务数据单元MAC SDU,所述第一指示信息指示所述MAC SDU包括请求系统信息的消息;
    所述第一网络设备向第二网络设备发送请求消息,所述请求消息包括所述请求系统信息的消息;
    所述第一网络设备向所述终端设备发送系统信息。
  12. 如权利要求11所述的方法,其特征在于,所述网络设备包括基站分布单元DU,或者所述网络设备包括中继节点。
  13. 如权利要求11所述的方法,其特征在于,所述第一指示信息包括所述MAC subPDU包含的MAC子头中的逻辑信道标识LCID的值,所述LCID的值用于包括指示所述MAC SDU传输的是请求系统信息的消息。
  14. 如权利要求13所述的方法,其特征在于,所述请求系统信息的消息包括:通过公共控制逻辑信道CCCH传输的无线资源控制协议RRC消息,或通过专用控制逻辑信道DCCH传输的无线资源控制协议RRC消息。
  15. 如权利要求13或14所述的方法,其特征在于,所述LCID的值为第一值时,所述LCID的值指示所述MAC SDU传输的是通过所述CCCH或DCCH传输的请求系统信息的RRC消息。
  16. 如权利要求15所述的方法,其特征在于,所述第一网络设备接收终端设备发送的MAC subPDU之前,所述方法还包括:
    所述第一网络设备向所述终端设备发送第二指示信息,所述第二指示信息用于指示所述第一网络设备支持所述终端设备使用所述LCID的第一值。
  17. 如权利要求16所述的方法,其特征在于,所述第二指示信息包含于所述网络设备广播的主系统信息MIB中,或者包含于所述网络设备广播的系统信息块1SIB1中。
  18. 一种终端设备,其特征在于,所述终端设备包括:处理器、存储器和收发器,其中:
    所述处理器、所述存储器和所述收发器相互连接,所述存储器用于存储计算机程序,所述计算机程序包括程序指令,所述处理器被配置用于调用所述程序指令,执行如权利要求1至17任意一项所述的方法。
  19. 一种第一网络设备,其特征在于,所述第一网络设备包括:处理器、存储器和收发器,其中:
    所述处理器、所述存储器和所述收发器相互连接,所述存储器用于存储计算机程序,所述计算机程序包括程序指令,所述处理器被配置用于调用所述程序指令,执行如权利要求1至17任意一项所述的方法。
  20. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有计算机程序,所述计算机程序包括程序指令,所述程序指令当被处理器执行时,使所述处理器执行如权利要求1至17任意一项所述的方法。
  21. 一种芯片系统,其特征在于,所述芯片系统包括至少一个处理器,存储器和接口电路,所述存储器、所述接口电路和所述至少一个处理器通过线路互联,所述至少一个存储器中存储有指令;所述指令被所述处理器执行时,实现权利要求1-17任一所述的方法。
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