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WO2018045681A1 - 通信方法和通信装置 - Google Patents

通信方法和通信装置 Download PDF

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Publication number
WO2018045681A1
WO2018045681A1 PCT/CN2016/112784 CN2016112784W WO2018045681A1 WO 2018045681 A1 WO2018045681 A1 WO 2018045681A1 CN 2016112784 W CN2016112784 W CN 2016112784W WO 2018045681 A1 WO2018045681 A1 WO 2018045681A1
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WO
WIPO (PCT)
Prior art keywords
primary
cell
cell group
terminal
serving cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/112784
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English (en)
French (fr)
Inventor
李明菊
朱亚军
张云飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Original Assignee
Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Application filed by Yulong Computer Telecommunication Scientific Shenzhen Co Ltd filed Critical Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Priority to US16/331,610 priority Critical patent/US10735971B2/en
Publication of WO2018045681A1 publication Critical patent/WO2018045681A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a communication method and a communication device.
  • 3GPP proposes the concept of LAA (LTE Assisted Access) for using unlicensed spectrum with the help of LTE licensed spectrum.
  • LAA LTE Assisted Access
  • the LAA scheme is based on carrier aggregation function to deploy LTE system in unlicensed frequency band.
  • the unlicensed spectrum can work in two ways.
  • One is the Supplemental Downlink (SDL), that is, only the downlink transmission subframe, and the other is the TDD mode, which includes both the downlink subframe and the uplink subframe.
  • SDL Supplemental Downlink
  • TDD mode which includes both the downlink subframe and the uplink subframe.
  • This situation can only be supplemented by the carrier aggregation technology.
  • the TDD mode can also be used by DC (Dual Connectivity) or independently.
  • the existing scheme only discusses various problems when the unlicensed spectrum and the LTE licensed spectrum work in a carrier aggregation manner, and does not discuss the problem when working in a dual connectivity manner.
  • the connection between the base station where the unlicensed spectrum is deployed and the base station where the licensed spectrum is located is not ideal, and only the dual connection method can be used.
  • the SeNB (Secondary eNB) needs to have a PSCell (Primary Secondary Cell) to provide some functions of the PCell (Primary Cell), such as MIB (Master Information Block).
  • the information that the MIB mainly contains is the SFN (System Frame Number), the downlink bandwidth, and the PHICH (Physical Hybrid ARQ Indicator Channel) configuration. Only the system frame number cannot be sent by the PCell.
  • the MIB is transmitted in a period of 40 ms, and is repeatedly transmitted 4 times every 40 ms.
  • the first time is transmitted in subframe#0 in a radio frame with a system frame number of 4, and in the next three radio frames.
  • the subframe #0 repeats the content transmitted by the subframe#0 in the first radio frame.
  • the content transmitted within the next 40 ms may be different from the content transmitted within the previous 40 ms.
  • PCells working on unlicensed carriers can also be deployed, that is, cells on the unlicensed spectrum operate independently (ie, standalone) to implement communication control.
  • the unlicensed spectrum is occupied, it is required to use the Listening Before Talk (LBT) mechanism. If the channel is occupied by other devices, the MIB cannot be sent normally, and the system frame of the MIB cannot be received normally. The number cannot be time synchronized, causing communication to fail.
  • LBT Listening Before Talk
  • the present invention is based on at least one of the above technical problems, and proposes a new communication scheme, which can improve the transmission probability of a primary information group on a primary cell group or a primary secondary cell group in an unlicensed frequency band, thereby ensuring The user receives the MIB in time to perform time synchronization according to the system frame number in the MIB, thereby ensuring normal communication, and meeting the delay and efficiency requirements of the communication.
  • a communication method comprising the steps of: configuring at least one serving cell to each terminal, each of the serving cells operating on an unlicensed carrier; Selecting at least one of the at least one serving cell as the primary cell or the primary secondary cell of each terminal to form a primary cell group or a primary secondary cell group of each terminal; through the primary cell group or The primary secondary cell group transmits a primary information block to each of the terminals.
  • At least one primary cell as each terminal is selected from at least one serving cell operating on an unlicensed frequency band to form a primary cell group of each terminal, and further through the primary cell group
  • the unlicensed frequency band works independently and the communication scenario of the primary cell is deployed on the unlicensed frequency band. Since the channel cannot be continuously occupied on the unlicensed frequency band, there is a channel detection mechanism, so The primary cell group sends the primary information block to each terminal, which can improve the transmission probability of the primary information block on the primary cell group of each terminal, thereby ensuring that the user receives the MIB in time, according to the system frame number in the MIB. Time synchronization is performed to ensure normal communication and meet the delay and efficiency requirements of communication.
  • a terminal sends a main information block, it is a dual-connection communication scenario on an unlicensed band and a licensed band. Since the channel cannot be continuously occupied on the unlicensed band, that is, there is a channel detection mechanism, so by the primary auxiliary cell group Sending a primary information block to each terminal may improve the transmission probability of the primary information block on the primary secondary cell group of each terminal, thereby ensuring that the user receives the MIB in time to perform time synchronization according to the system frame number in the MIB. Thereby ensuring the normal operation of the communication, meeting the delay and efficiency requirements of the communication.
  • the present invention proposes the following three schemes for how to configure the at least one serving cell and how to select and form a primary cell group or a primary secondary cell group of each terminal:
  • the primary serving cell of the primary base station operating on the licensed frequency band configures the at least one serving cell on the secondary base station to each of the terminals, wherein the primary serving cell selects at least one of the at least one serving cell as Each of the terminals is a primary secondary cell on the secondary base station to form a primary secondary cell group of each terminal on the secondary base station.
  • the solution 1 is applicable to a scenario in which the unlicensed frequency band and the licensed frequency band communicate in a dual connectivity manner, that is, the primary serving cell of the primary base station operating on the licensed frequency band configures at least one serving cell on the secondary base station to each terminal, and The primary serving cell selects and forms a primary secondary cell group for each terminal on the secondary base station.
  • the primary serving cell of the primary base station operating on the licensed frequency band configures, for each of the terminals, a primary secondary serving cell operating on the unlicensed frequency band on the secondary base station, and the primary secondary serving serving cell is in the Configuring, on the secondary base station, 0 or at least one cell operating on the unlicensed frequency band, where the 0 or at least one cell and the primary secondary serving cell form the at least one serving cell, where the primary secondary serving cell At least one of the at least one serving cell is selected as the primary secondary cell of the secondary terminal on the secondary base station to form a primary secondary cell group of each terminal on the secondary base station.
  • the second scheme is also applicable to the scenario where the unlicensed frequency band and the licensed frequency band communicate in a dual-connection manner, that is, the primary serving cell of the primary base station working on the licensed frequency band is configured to configure the primary secondary serving cell on the secondary base station to each terminal.
  • the primary auxiliary serving cell configures, on each of the terminals, 0 or at least one cell working on the unlicensed frequency band, and the 0 or at least one cell and the primary auxiliary serving cell jointly form the at least one serving cell.
  • the primary secondary serving cell then selects and composes the primary secondary cell group for each terminal on the secondary base station.
  • configuration signaling for configuring the 0 or at least one cell to each terminal is sent by one or more of the primary secondary serving cells .
  • the configuration signaling may be RRC (Radio Resource Control) signaling.
  • the primary serving cell of the primary base station operating on the unlicensed frequency band configures, on each of the primary base stations, 0 or at least one cell operating on the unlicensed frequency band, the 0 or at least one cell and the The primary serving cell constitutes the at least one serving cell, wherein the primary serving cell selects at least one of the at least one serving cell as a primary cell of each terminal to form a master of each terminal Community group.
  • the third scheme is applicable to the communication scenario in which the unlicensed frequency band works independently and the primary cell is deployed on the unlicensed frequency band, that is, the primary serving cell of the primary base station on the unlicensed frequency band is configured to work on the primary base station in the unlicensed frequency band.
  • the 0 or at least one cell and the primary serving cell jointly form the at least one serving cell, and then the primary serving cell selects and constitutes a primary cell group of each terminal.
  • the step of sending a primary information block to each of the terminals by using the primary cell group or the primary secondary cell group specifically: by using the primary cell group or primary auxiliary A cell in the cell group that detects that the downlink channel is idle transmits the primary information block.
  • the LBT mechanism needs to be introduced when working in the unlicensed frequency band, it is necessary to pass the primary cell group or the primary auxiliary.
  • a cell in the cell group that detects that the downlink channel is idle transmits a primary information block.
  • the communication method further includes: if the plurality of cells in the primary cell group or the primary secondary cell group detect that the downlink channel is idle, At least one of the plurality of cells transmits the primary information block.
  • the primary information block may be transmitted by one cell or by multiple cells.
  • the communication method further includes: if the plurality of cells in the primary cell group or the primary secondary cell group detect that the downlink channel is idle, control the multiple cells.
  • the primary information block is transmitted separately at different points in time.
  • the transmission opportunity of the main information block can be increased, thereby ensuring that the user can receive the MIB in time, according to the MIB.
  • the system frame number is time synchronized to ensure normal communication.
  • the cell that sends the primary information block transmits in a period of 5 ms or 10 ms.
  • the transmission opportunity of the main information block can also be increased, thereby ensuring that the user can receive the MIB in time, according to the system in the MIB.
  • the frame number is time synchronized to ensure normal communication.
  • any one of the primary cell group or the primary secondary cell group detects that the downlink channel corresponding to the six consecutive resource blocks in the limited frequency domain is idle, It is determined that the downlink channel is idle.
  • the bandwidth of the limited frequency domain is less than or equal to the bandwidth of the any one of the cells, and is greater than or equal to 6 resource blocks.
  • the cells in the primary cell group or the primary secondary cell group can perform narrow-band channel detection, that is, as long as It is determined that the downlink channel idle is detected when the downlink channel idle corresponding to the six consecutive resource blocks in the specified limited frequency domain is detected.
  • the number of each of the six consecutive resource blocks may be further predefined, that is, the foregoing consecutive six resource blocks.
  • the number is a predefined resource block number, so that the user equipment can detect and receive the main information block at the defined location, which reduces the detection and reception complexity of the user equipment.
  • the transmission duration of the primary information block can be set to be greater than or equal to the duration occupied by 1 symbol (Symbol), and less than or equal to The length of time that 4 symbols are occupied.
  • the step of sending the primary information block by using any one of the primary cell group or the primary secondary cell group to detect the idle channel idle specifically includes:
  • the main information block is sent in the remaining duration in the subframe n;
  • the primary information block is sent in the subframe n;
  • the process of performing downlink channel detection by any one of the primary cell group or the primary secondary cell group includes:
  • a random number is selected from 0 to the contention window, where M is a positive integer
  • the channel detection is continued in units of 9 ⁇ s. If the channel is busy, the value of the random number is unchanged, and when the duration of the downlink channel is continuously idle is 16 ⁇ s+M ⁇ 9 ⁇ s, The value of the random number is decreased by 1; if the channel is detected to be idle, the value of the random number is decreased by 1;
  • a communication apparatus comprising: a configuration unit configured to configure at least one serving cell to each terminal, each of the serving cells operating on an unlicensed carrier; Setting to select at least one of the at least one serving cell as a primary cell or a primary secondary cell of each terminal to form a primary cell group or a primary secondary cell group of each terminal; a communication control unit And configured to send a primary information block to each of the terminals by the primary cell group or the primary secondary cell group.
  • At least one primary cell as each terminal is selected from at least one serving cell operating on an unlicensed frequency band to form a primary cell group of each terminal, and further through the primary cell group
  • the unlicensed frequency band works independently and the communication scenario of the primary cell is deployed on the unlicensed frequency band. Since the channel cannot be continuously occupied on the unlicensed frequency band, there is a channel detection mechanism, so The primary cell group sends the primary information block to each terminal, which can improve the transmission probability of the primary information block on the primary cell group of each terminal, thereby ensuring that the user receives the MIB in time, according to the system frame number in the MIB. Time synchronization is performed to ensure normal communication and meet the delay and efficiency requirements of communication.
  • a terminal sends a main information block, it is a dual-connection communication scenario on an unlicensed band and a licensed band. Since the channel cannot be continuously occupied on the unlicensed band, that is, there is a channel detection mechanism, so by the primary auxiliary cell group Sending a primary information block to each terminal may improve the transmission probability of the primary information block on the primary secondary cell group of each terminal, thereby ensuring that the user receives the MIB in time to perform time synchronization according to the system frame number in the MIB. Thereby ensuring the normal operation of the communication, meeting the delay and efficiency requirements of the communication.
  • the present invention proposes the following three schemes for how the configuration unit configures the at least one serving cell and how the selection unit selects and forms the primary cell group or the primary secondary cell group of each terminal:
  • the configuration unit is specifically configured to configure the at least one serving cell on the secondary base station by using the primary serving cell of the primary base station that operates on the licensed frequency band; the selecting unit is specifically configured to The primary serving cell selects at least one of the at least one serving cell as the primary secondary cell of the secondary terminal on the secondary base station to form a primary secondary cell group of each terminal on the secondary base station. group.
  • the solution 1 is applicable to a scenario in which the unlicensed frequency band and the licensed frequency band communicate in a dual connectivity manner, that is, the primary serving cell of the primary base station operating on the licensed frequency band configures at least one serving cell on the secondary base station to each terminal, and The primary serving cell selects and forms a primary secondary cell group for each terminal on the secondary base station.
  • the configuration unit is specifically configured to: configure, by the primary serving cell of the primary base station working on the licensed frequency band, the primary secondary serving cell operating on the unlicensed frequency band to the secondary base station, and the primary secondary serving cell Configuring, on each of the secondary base stations, 0 or at least one cell working on an unlicensed frequency band, where the 0 or at least one cell and the primary secondary serving cell form the at least one serving cell;
  • the selecting unit is specifically configured to: select, by using the primary secondary serving cell, at least one of the at least one serving cell as a primary secondary cell of each terminal on the secondary base station, to form each of the The primary secondary cell group of the terminal on the secondary base station.
  • the second scheme is also applicable to the scenario where the unlicensed frequency band and the licensed frequency band communicate in a dual-connection manner, that is, the primary serving cell of the primary base station working on the licensed frequency band is configured to configure the primary secondary serving cell on the secondary base station to each terminal.
  • the primary auxiliary serving cell configures, on each of the terminals, 0 or at least one cell working on the unlicensed frequency band, and the 0 or at least one cell and the primary auxiliary serving cell jointly form the at least one serving cell.
  • the primary secondary serving cell then selects and composes the primary secondary cell group for each terminal on the secondary base station.
  • configuration signaling for configuring the 0 or at least one cell to each terminal is sent by one or more of the primary secondary serving cells .
  • the configuration signaling may be RRC signaling.
  • the configuration unit is specifically configured to: configure, by the primary serving cell of the primary base station operating on the unlicensed frequency band, 0 or at least one cell working on the unlicensed frequency band on the primary base station to each terminal, Depicting 0 or at least one cell and the primary serving cell to form the at least one serving cell; the selecting unit is specifically configured to: select, by the primary serving cell, at least one of the at least one serving cell as the The primary cell of each terminal to form a primary cell group of each terminal.
  • the third scheme is applicable to the communication scenario in which the unlicensed frequency band works independently and the primary cell is deployed on the unlicensed frequency band, that is, the primary serving cell of the primary base station on the unlicensed frequency band is configured to work on the primary base station in the unlicensed frequency band.
  • the 0 or at least one cell and the primary serving cell jointly form the at least one serving cell, and then the primary serving cell selects and constitutes a primary cell group of each terminal.
  • the communication control unit is configured to: send the primary information block by using a cell in the primary cell group or a primary secondary cell group that detects that the downlink channel is idle.
  • the LBT mechanism needs to be introduced when working in the unlicensed frequency band, it is necessary to pass the primary cell group or the primary auxiliary.
  • a cell in the cell group that detects that the downlink channel is idle transmits a primary information block.
  • the communication control unit is further configured to: if the primary cell group or the plurality of cells in the primary secondary cell group detect that the downlink channel is idle, at the same time only The primary information block is transmitted by at least one of the plurality of cells.
  • the primary information block may be transmitted by one cell or by multiple cells.
  • the communication control unit is further configured to: if the primary cell group or a plurality of cells in the primary secondary cell group detect that the downlink channel is idle, control the multiple The cells respectively transmit the main information blocks at different time points.
  • the transmission opportunity of the main information block can be increased, thereby ensuring that the user can receive the MIB in time, according to the MIB.
  • the system frame number is time synchronized to ensure normal communication.
  • the cell that sends the primary information block transmits in a period of 5 ms or 10 ms.
  • the transmission opportunity of the main information block can also be increased, thereby ensuring that the user can receive the MIB in time, according to the system in the MIB.
  • the frame number is time synchronized to ensure normal communication.
  • any one of the primary cell group or the primary secondary cell group detects that the downlink channel corresponding to the six consecutive resource blocks in the limited frequency domain is idle, It is determined that the downlink channel is idle.
  • the bandwidth of the limited frequency domain is less than or equal to the bandwidth of the any one of the cells, and is greater than or equal to 6 resource blocks.
  • the cells in the primary cell group or the primary secondary cell group can perform narrow-band channel detection, that is, as long as the specified limited is detected.
  • the downlink channel corresponding to the six consecutive resource blocks in the frequency domain is idle, and it can be determined that the downlink channel is idle.
  • the number of each of the six consecutive resource blocks may be further predefined, that is, the foregoing consecutive six resource blocks.
  • the number is a predefined resource block number, so that the user equipment can detect and receive the main information block at the defined location, which reduces the detection and reception complexity of the user equipment.
  • the transmission duration of the primary information block can be set to be greater than or equal to the duration occupied by 1 symbol (Symbol), and less than or equal to The length of time that 4 symbols are occupied.
  • the communication control unit sends the operation of the primary information block by using any one of the primary cell group or the primary secondary cell group that detects that the downlink channel is idle, and specifically includes: :
  • the cell is sent in the remaining time in the subframe n by the any cell.
  • the cell detects that the channel is idle when the one shot channel of 16 ⁇ s+M ⁇ 9 ⁇ s is detected at the end position of the subframe before the subframe n, the cell is transmitted in the subframe n through the any cell.
  • Main information block
  • the process of performing downlink channel detection by any one of the primary cell group or the primary secondary cell group includes:
  • a random number is selected from 0 to the contention window, where M is a positive integer
  • the channel detection is continued in units of 9 ⁇ s. If the channel is busy, the value of the random number is unchanged, and when the duration of the downlink channel is continuously idle is 16 ⁇ s+M ⁇ 9 ⁇ s, The value of the random number is decreased by 1; if the channel is detected to be idle, the value of the random number is decreased by 1;
  • a communication method comprising: determining, by a terminal, a primary cell group or a primary secondary cell group operating on an unlicensed carrier; receiving the primary cell group or a primary secondary cell group a primary information block sent by a cell in the group; wherein the primary cell group or the primary secondary cell group is selected from at least one serving cell operating on an unlicensed carrier, each of the serving cells Works on an unlicensed carrier.
  • the unlicensed frequency band works independently, and the communication scenario of the primary cell is deployed on the unlicensed frequency band.
  • the channel cannot be continuously occupied on the licensed frequency band, that is, the channel detection mechanism exists. Therefore, the terminal can increase the probability that the primary cell group sends the primary information block to the terminal by receiving the primary information block sent by the cell in the primary cell group, thereby ensuring the terminal.
  • the main information block is received in time to meet the delay and efficiency requirements of the communication.
  • a primary secondary cell group When a primary secondary cell group is selected from at least one serving cell operating in an unlicensed frequency band, a dual connectivity communication scenario is performed on the unlicensed frequency band and the licensed frequency band, and the channel cannot be continuously occupied on the unlicensed frequency band. That is, the channel detection mechanism exists. Therefore, the terminal can increase the probability that the primary secondary cell group sends the primary information block to the terminal by receiving the primary information block sent by the cell in the primary secondary cell group, thereby ensuring that the terminal receives the primary information block in time. Meet the delay and efficiency requirements of communication.
  • the determining, by the terminal, the primary secondary cell group working on the unlicensed carrier may be determined by receiving the notification signaling sent by the primary secondary cell of the primary base station or the primary secondary cell of the secondary base station on the unlicensed frequency band. .
  • a communication apparatus comprising: a determining unit configured to determine a primary cell group or a primary secondary cell group operating on an unlicensed carrier, wherein the primary cell group Or the primary secondary cell group is formed by selecting at least one serving cell operating on the unlicensed carrier, each of the serving cells working on an unlicensed carrier; and receiving unit configured to receive the primary cell The primary information block sent by the cell in the group or primary secondary cell group.
  • the unlicensed frequency band works independently, and the communication scenario of the primary cell is deployed on the unlicensed frequency band.
  • the channel cannot be continuously occupied on the licensed frequency band, that is, the channel detection mechanism exists. Therefore, the terminal can increase the probability that the primary cell group sends the primary information block to the terminal by receiving the primary information block sent by the cell in the primary cell group, thereby ensuring the terminal.
  • the main information block is received in time to meet the delay and efficiency requirements of the communication.
  • a primary secondary cell group When a primary secondary cell group is selected from at least one serving cell operating in an unlicensed frequency band, a dual connectivity communication scenario is performed on the unlicensed frequency band and the licensed frequency band, and the channel cannot be continuously occupied on the unlicensed frequency band. That is, the channel detection mechanism exists. Therefore, the terminal can increase the probability that the primary secondary cell group sends the primary information block to the terminal by receiving the primary information block sent by the cell in the primary secondary cell group, thereby ensuring that the terminal receives the primary information block in time. Meet the delay and efficiency requirements of communication.
  • the determining, by the terminal, the primary secondary cell group working on the unlicensed carrier may be determined by receiving the notification signaling sent by the primary secondary cell of the primary base station or the primary secondary cell of the secondary base station on the unlicensed frequency band. .
  • the above technical solution can improve the transmission probability of the primary information group on the primary cell group or the primary secondary cell group in the unlicensed frequency band, and further ensure that the user receives the MIB in time to perform time according to the system frame number in the MIB. Synchronization ensures the normal operation of the communication and meets the delay and efficiency requirements of the communication.
  • FIG. 1 shows a schematic flow chart of a communication method according to a first embodiment of the present invention
  • Figure 2 shows a schematic block diagram of a communication device in accordance with a first embodiment of the present invention
  • Figure 3 is a schematic flow chart showing a communication method according to a second embodiment of the present invention.
  • Figure 4 shows a schematic block diagram of a communication device in accordance with a second embodiment of the present invention.
  • Figure 5 shows a schematic block diagram of a communication device in accordance with a third embodiment of the present invention.
  • Fig. 6 shows a schematic block diagram of a communication device in accordance with a fourth embodiment of the present invention.
  • Fig. 1 shows a schematic flow chart of a communication method according to a first embodiment of the present invention.
  • a communication method includes the following steps:
  • Step S10 Configure at least one serving cell to each terminal, and each of the serving cells operates on an unlicensed carrier.
  • Step S12 Select at least one primary cell or primary secondary cell as the each terminal from the at least one serving cell to form a primary cell group or a primary secondary cell group of each terminal.
  • the present invention proposes the following three schemes:
  • the primary serving cell of the primary base station operating on the licensed frequency band configures the at least one serving cell on the secondary base station to each of the terminals, wherein the primary serving cell selects at least one of the at least one serving cell as Each of the terminals is a primary secondary cell on the secondary base station to form a primary secondary cell group of each terminal on the secondary base station.
  • the solution 1 is applicable to a scenario in which the unlicensed frequency band and the licensed frequency band communicate in a dual connectivity manner, that is, the primary serving cell of the primary base station operating on the licensed frequency band configures at least one serving cell on the secondary base station to each terminal, and The primary serving cell selects and forms a primary secondary cell group for each terminal on the secondary base station.
  • the primary serving cell of the primary base station operating on the licensed frequency band configures, for each of the terminals, a primary secondary serving cell operating on the unlicensed frequency band on the secondary base station, and the primary secondary serving serving cell is in the Configuring, on the secondary base station, 0 or at least one cell operating on the unlicensed frequency band, where the 0 or at least one cell and the primary secondary serving cell form the at least one serving cell, where the primary secondary serving cell At least one of the at least one serving cell is selected as the primary secondary cell of the secondary terminal on the secondary base station to form a primary secondary cell group of each terminal on the secondary base station.
  • the second scheme is also applicable to the scenario where the unlicensed frequency band and the licensed frequency band communicate in a dual-connection manner, that is, the primary serving cell of the primary base station working on the licensed frequency band is configured to configure the primary secondary serving cell on the secondary base station to each terminal.
  • the primary auxiliary serving cell configures, on each of the terminals, 0 or at least one cell working on the unlicensed frequency band, and the 0 or at least one cell and the primary auxiliary serving cell jointly form the at least one serving cell.
  • the primary secondary serving cell then selects and composes the primary secondary cell group for each terminal on the secondary base station.
  • configuration signaling for configuring the 0 or at least one cell to each terminal is sent by one or more of the primary secondary serving cells .
  • the configuration signaling may be RRC signaling.
  • the primary serving cell of the primary base station operating on the unlicensed frequency band configures, on each of the primary base stations, 0 or at least one cell operating on the unlicensed frequency band, the 0 or at least one cell and the The primary serving cell constitutes the at least one serving cell, wherein the primary serving cell selects at least one of the at least one serving cell as a primary cell of each terminal to form a master of each terminal Community group.
  • the third scheme is applicable to the communication scenario in which the unlicensed frequency band works independently and the primary cell is deployed on the unlicensed frequency band, that is, the primary serving cell of the primary base station on the unlicensed frequency band is configured to work on the primary base station in the unlicensed frequency band.
  • the 0 or at least one cell and the primary serving cell jointly form the at least one serving cell, and then the primary serving cell selects and constitutes a primary cell group of each terminal.
  • the communication method shown in FIG. 1 further includes:
  • Step S14 Send a primary information block to each terminal by using the primary cell group or the primary secondary cell group.
  • step S14 specifically includes: transmitting, by the primary cell group or a primary secondary cell group, the primary information block by detecting a downlink channel idle cell.
  • the LBT mechanism needs to be introduced when working in the unlicensed frequency band, it is necessary to pass the primary cell group or the primary auxiliary.
  • a cell in the cell group that detects that the downlink channel is idle transmits a primary information block.
  • the primary information block is sent only by at least one of the multiple cells at the same time.
  • the primary information block may be transmitted by one cell or by multiple cells.
  • the communication method further includes: if the plurality of cells in the primary cell group or the primary secondary cell group detect that the downlink channel is idle, controlling the multiple cells to be respectively sent at different time points.
  • the main information block if the plurality of cells in the primary cell group or the primary secondary cell group detect that the downlink channel is idle, controlling the multiple cells to be respectively sent at different time points.
  • the transmission opportunity of the main information block can be increased, thereby ensuring that the user can receive the MIB in time, according to the MIB.
  • the system frame number is time synchronized to ensure normal communication.
  • the cell that sends the primary information block transmits in a period of 5 ms or 10 ms.
  • the transmission opportunity of the main information block can also be increased, thereby ensuring that the user can receive the MIB in time, according to the system in the MIB.
  • the frame number is time synchronized to ensure normal communication.
  • any one of the primary cell group or the primary secondary cell group detects that the downlink channel corresponding to the six consecutive resource blocks in the limited frequency domain is idle, It is determined that the downlink channel is idle.
  • the bandwidth of the limited frequency domain is less than or equal to the bandwidth of the any one of the cells, and is greater than or equal to 6 resource blocks.
  • the cells in the primary cell group or the primary secondary cell group can perform narrow-band channel detection, that is, as long as the specified limited is detected.
  • the downlink channel corresponding to the six consecutive resource blocks in the frequency domain is idle, and it can be determined that the downlink channel is idle.
  • the number of each of the six consecutive resource blocks may be predefined, that is, the number of each of the consecutive six resource blocks is a predefined resource block number, such that The user equipment can detect and receive the main information block at a defined location, which reduces the detection and reception complexity of the user equipment.
  • the transmission duration of the primary information block can be set to be greater than or equal to the duration occupied by 1 symbol (Symbol), and less than or equal to The length of time that 4 symbols are occupied.
  • the mechanism for performing channel detection in any one of the primary cell group or the primary secondary cell group mainly includes the following two:
  • any cell detects a channel idle process by performing a 16 ⁇ s+M ⁇ 9 ⁇ s one shot channel detection process at a start position of the subframe n, transmitting the primary information block within a remaining duration of the subframe n;
  • the primary information block is transmitted in the subframe n;
  • a random number is selected from 0 to the contention window, where M is a positive integer
  • the channel detection is continued in units of 9 ⁇ s. If the channel is busy, the value of the random number is unchanged, and when the duration of the downlink channel is continuously idle is 16 ⁇ s+M ⁇ 9 ⁇ s, The value of the random number is decreased by 1; if the channel is detected to be idle, the value of the random number is decreased by 1;
  • the primary information block is transmitted to each terminal by the primary cell group or the primary secondary cell group.
  • the probability of sending the primary information group on each terminal or the primary information block on the primary secondary cell group can be increased, and the user can be sure to receive the MIB in time to perform time synchronization according to the system frame number in the MIB, thereby ensuring communication. Normally, the communication delay and efficiency requirements are met.
  • Fig. 2 shows a schematic block diagram of a communication device in accordance with a first embodiment of the present invention.
  • a communication device 200 includes a configuration unit 202, a selection unit 204, and a communication control unit 206.
  • the configuration unit 202 is configured to configure at least one serving cell to each terminal, each of the serving cells working on an unlicensed carrier; and the selecting unit 204 is configured to select at least one of the at least one serving cell as the Describe a primary cell or a primary secondary cell of each terminal to form a primary cell group or a primary secondary cell group of each terminal; the communication control unit 206 is configured to pass the primary cell group or the primary secondary cell group A primary information block is sent to each of the terminals.
  • At least one primary cell as each terminal is selected from at least one serving cell operating on an unlicensed frequency band to form a primary cell group of each terminal, and further through the primary cell group
  • the unlicensed frequency band works independently and the communication scenario of the primary cell is deployed on the unlicensed frequency band. Since the channel cannot be continuously occupied on the unlicensed frequency band, there is a channel detection mechanism, so The primary cell group sends the primary information block to each terminal, which can improve the transmission probability of the primary information block on the primary cell group of each terminal, thereby ensuring that the user receives the MIB in time, according to the system frame number in the MIB. Time synchronization is performed to ensure normal communication and meet the delay and efficiency requirements of communication.
  • a terminal sends a main information block, it is a dual-connection communication scenario on an unlicensed band and a licensed band. Since the channel cannot be continuously occupied on the unlicensed band, that is, there is a channel detection mechanism, so by the primary auxiliary cell group Sending a primary information block to each terminal may improve the transmission probability of the primary information block on the primary secondary cell group of each terminal, thereby ensuring that the user receives the MIB in time to perform time synchronization according to the system frame number in the MIB. Thereby ensuring the normal operation of the communication, meeting the delay and efficiency requirements of the communication.
  • the present invention proposes the following three schemes:
  • the configuration unit 202 is specifically configured to configure the at least one serving cell on the secondary base station by using the primary serving cell of the primary base station that operates on the licensed frequency band; the selecting unit 204 is specifically configured to pass The primary serving cell selects at least one of the at least one serving cell as the primary secondary cell of each terminal on the secondary base station to form a primary auxiliary of each terminal on the secondary base station. Community group.
  • the solution 1 is applicable to a scenario in which the unlicensed frequency band and the licensed frequency band communicate in a dual connectivity manner, that is, the primary serving cell of the primary base station operating on the licensed frequency band configures at least one serving cell on the secondary base station to each terminal, and The primary serving cell selects and forms a primary secondary cell group for each terminal on the secondary base station.
  • the configuration unit 202 is specifically configured to: configure, by the primary serving cell of the primary base station working on the licensed frequency band, the primary secondary serving cell working on the unlicensed frequency band to the secondary base station, the primary auxiliary service The cell configures, on the secondary base station, 0 or at least one cell working on the unlicensed frequency band, and the 0 or at least one cell and the primary secondary serving cell form the at least one serving cell
  • the selecting unit 204 is specifically configured to: select, by the primary secondary serving cell, at least one of the at least one serving cell as the primary secondary cell of each terminal on the secondary base station, to form the A primary secondary cell group of each terminal on the secondary base station.
  • the second scheme is also applicable to the scenario where the unlicensed frequency band and the licensed frequency band communicate in a dual-connection manner, that is, the primary serving cell of the primary base station working on the licensed frequency band is configured to configure the primary secondary serving cell on the secondary base station to each terminal.
  • the primary auxiliary serving cell configures, on each of the terminals, 0 or at least one cell working on the unlicensed frequency band, and the 0 or at least one cell and the primary auxiliary serving cell jointly form the at least one serving cell.
  • the primary secondary serving cell then selects and composes the primary secondary cell group for each terminal on the secondary base station.
  • configuration signaling for configuring the 0 or at least one cell to each terminal is sent by one or more of the primary secondary serving cells .
  • the configuration signaling may be RRC signaling.
  • the configuration unit 202 is specifically configured to: configure, by the primary serving cell of the primary base station operating on the unlicensed frequency band, 0 or at least one cell working on the unlicensed frequency band on the primary base station to each terminal, The 0 or at least one cell and the primary serving cell form the at least one serving cell; the selecting unit 204 is specifically configured to: select at least one of the at least one serving cell by using the primary serving cell The primary cell of each terminal is configured to form a primary cell group of each terminal.
  • the third scheme is applicable to the communication scenario in which the unlicensed frequency band works independently and the primary cell is deployed on the unlicensed frequency band, that is, the primary serving cell of the primary base station on the unlicensed frequency band is configured to work on the primary base station in the unlicensed frequency band.
  • the 0 or at least one cell and the primary serving cell jointly form the at least one serving cell, and then the primary serving cell selects and constitutes a primary cell group of each terminal.
  • the communication control unit 206 is specifically configured to: send the primary information block by using a cell in the primary cell group or a primary secondary cell group that detects that the downlink channel is idle.
  • the LBT mechanism needs to be introduced when working in the unlicensed frequency band, it is necessary to pass the primary cell group or the primary auxiliary.
  • a cell in the cell group that detects that the downlink channel is idle transmits a primary information block.
  • the communication control unit 206 is further configured to: if the plurality of cells in the primary cell group or the primary secondary cell group detect that the downlink channel is idle, pass only the multiple cells at the same time The primary information block is transmitted by one cell or multiple cells.
  • the primary information block may be transmitted by one cell or by multiple cells.
  • the communication control unit 206 is further configured to: if multiple cells in the primary cell group or the primary secondary cell group detect that the downlink channel is idle, control the multiple cells at different time points.
  • the main information block is sent separately.
  • the transmission opportunity of the main information block can be increased, thereby ensuring that the user can receive the MIB in time, according to the MIB.
  • the system frame number is time synchronized to ensure normal communication.
  • the cell that sends the primary information block transmits in a period of 5 ms or 10 ms.
  • the transmission opportunity of the main information block can also be increased, thereby ensuring that the user can receive the MIB in time, according to the system in the MIB.
  • the frame number is time synchronized to ensure normal communication.
  • any one of the primary cell group or the primary secondary cell group detects that the downlink channel corresponding to the six consecutive resource blocks in the limited frequency domain is idle, It is determined that the downlink channel is idle.
  • the bandwidth of the limited frequency domain is less than or equal to the bandwidth of the any one of the cells, and is greater than or equal to 6 resource blocks.
  • the cells in the primary cell group or the primary secondary cell group can perform narrow-band channel detection, that is, as long as the specified limited is detected.
  • the downlink channel corresponding to the six consecutive resource blocks in the frequency domain is idle, and it can be determined that the downlink channel is idle.
  • the number of each of the six consecutive resource blocks may be predefined, that is, the number of each of the consecutive six resource blocks.
  • the number of the predefined resource blocks is such that the user equipment can detect and receive the main information block at the defined location, which reduces the detection and reception complexity of the user equipment.
  • the transmission duration of the primary information block can be set to be greater than or equal to the duration occupied by 1 symbol (Symbol), and less than or equal to The length of time that 4 symbols are occupied.
  • the mechanism for performing channel detection in any one of the primary cell group or the primary secondary cell group mainly includes the following two:
  • any cell detects a channel idle process by performing a 16 ⁇ s+M ⁇ 9 ⁇ s one shot channel detection process at a start position of the subframe n, transmitting, by the any cell, the remaining time in the subframe n Main information block; or
  • the cell detects that the channel is idle when the one shot channel of 16 ⁇ s+M ⁇ 9 ⁇ s is detected at the end position of the subframe before the subframe n, the cell is transmitted in the subframe n through the any cell.
  • Main information block
  • a random number is selected from 0 to the contention window, where M is a positive integer
  • the channel detection is continued in units of 9 ⁇ s. If the channel is busy, the value of the random number is unchanged, and when the duration of the downlink channel is continuously idle is 16 ⁇ s+M ⁇ 9 ⁇ s, The value of the random number is decreased by 1; if the channel is detected to be idle, the value of the random number is decreased by 1;
  • Fig. 3 shows a schematic flow chart of a communication method according to a second embodiment of the present invention.
  • a communication method includes the following steps:
  • Step S30 The terminal determines a primary cell group or a primary secondary cell group that operates on an unlicensed carrier, where the primary cell group or the primary secondary cell group is from at least one serving cell operating on an unlicensed carrier. And consisting of selecting, each of the serving cells working on an unlicensed carrier.
  • the determining, by the terminal, the primary secondary cell group working on the unlicensed carrier may be determined by receiving the notification signaling sent by the primary secondary cell of the primary base station or the primary secondary cell of the secondary base station on the unlicensed frequency band. .
  • Step S32 receiving a primary information block sent by the cell in the primary cell group or the primary secondary cell group.
  • the unlicensed frequency band works independently, and the communication scenario of the primary cell is deployed on the unlicensed frequency band.
  • the channel cannot be continuously occupied on the licensed frequency band, that is, the channel detection mechanism exists. Therefore, the terminal can increase the probability that the primary cell group sends the primary information block to the terminal by receiving the primary information block sent by the cell in the primary cell group, thereby ensuring the terminal.
  • the main information block is received in time to meet the delay and efficiency requirements of the communication.
  • a primary secondary cell group When a primary secondary cell group is selected from at least one serving cell operating in an unlicensed frequency band, a dual connectivity communication scenario is performed on the unlicensed frequency band and the licensed frequency band, and the channel cannot be continuously occupied on the unlicensed frequency band. That is, the channel detection mechanism exists. Therefore, the terminal can increase the probability that the primary secondary cell group sends the primary information block to the terminal by receiving the primary information block sent by the cell in the primary secondary cell group, thereby ensuring that the terminal receives the primary information block in time. Meet the delay and efficiency requirements of communication.
  • Fig. 4 shows a schematic block diagram of a communication device in accordance with a second embodiment of the present invention.
  • a communication device 400 includes a determining unit 402 and a communication unit 404.
  • the determining unit 402 is configured to determine a primary cell group or a primary secondary cell group operating on an unlicensed carrier, where the primary cell group or the primary secondary cell group is at least from working on an unlicensed carrier.
  • Each of the serving cells is configured to be in an unlicensed carrier;
  • the communication unit 404 is configured to receive the primary information block sent by the cell in the primary cell group or the primary secondary cell group. .
  • the unlicensed frequency band works independently, and the communication scenario of the primary cell is deployed on the unlicensed frequency band.
  • the channel cannot be continuously occupied on the licensed frequency band, that is, the channel detection mechanism exists. Therefore, the terminal can increase the probability that the primary cell group sends the primary information block to the terminal by receiving the primary information block sent by the cell in the primary cell group, thereby ensuring the terminal.
  • the main information block is received in time to meet the delay and efficiency requirements of the communication.
  • a primary secondary cell group When a primary secondary cell group is selected from at least one serving cell operating in an unlicensed frequency band, a dual connectivity communication scenario is performed on the unlicensed frequency band and the licensed frequency band, and the channel cannot be continuously occupied on the unlicensed frequency band. That is, the channel detection mechanism exists. Therefore, the terminal can increase the probability that the primary secondary cell group sends the primary information block to the terminal by receiving the primary information block sent by the cell in the primary secondary cell group, thereby ensuring that the terminal receives the primary information block in time. Meet the delay and efficiency requirements of communication.
  • the determining unit 402 determines that the primary secondary cell group operating on the unlicensed carrier may be the notification signaling sent by the primary secondary cell of the primary base station or the primary secondary cell of the secondary base station on the unlicensed frequency band. definite.
  • the technical solution of the present invention mainly improves the transmission probability of the MIB by using a primary cell group (PCell Group) or a primary secondary cell group (PSCell Group) operating in an unlicensed frequency band, thereby ensuring timely reception by the user.
  • the MIB performs time synchronization according to the system frame number in the MIB to ensure normal communication and meet the communication delay and efficiency requirements.
  • the PCell of the primary base station operating on the unlicensed frequency band configures, for each terminal, 0 or at least one cell operating on the unlicensed frequency band on the primary base station, and the PCell selects 0 or 0 out of the 0 or at least one of the cells. At least one, and together with PCell, form the PCell Group for each terminal.
  • Each of the at least one cell operates on an unlicensed carrier, for example, Cell#1 is configured on the unlicensed carrier 1, Cell#2 is configured on the unlicensed carrier 2, and configured on the unlicensed carrier 3. Cell#3... Cell#M is configured on the unlicensed carrier M, and then the PCell selects 0 or at least one Cell and PCell to form a PCell Group for each terminal.
  • the number of cells in the PCell Group can have an upper limit, such as a maximum of 2, 3, or other values.
  • the PCell Group is independent, that is, the PCell Group of different users can be the same or different.
  • the configuration of the PSCell Group is divided into two configuration schemes:
  • the PCell of the primary base station (ie, the MeNB) operating on the licensed frequency band configures, for each terminal, at least one serving cell operating on the unlicensed frequency band on the secondary base station (ie, the SeNB), and the PCell selects the at least one serving cell from the at least one serving cell.
  • Each of the at least one serving cell operates on an unlicensed carrier, for example, SCell #1 is configured on the unlicensed carrier 1, and SCell #2 is configured on the unlicensed carrier 2, and the unlicensed carrier 3 is configured.
  • the SCell #3 is configured on the unlicensed carrier M, and the PCell selects at least one SCell to form a PSCell Group for each terminal.
  • the number of cells in the PSCell Group can have an upper limit, such as a maximum of 2, 3, or other values.
  • the PSCell Group is independent, that is, the PSCell Group of different users can be the same or different.
  • the PCell of the primary base station (ie, the MeNB) operating on the licensed frequency band configures the PSCell operating on the unlicensed frequency band on the secondary base station (ie, the SeNB) to each terminal, and the PSCell is configured to work on the SeNB for each terminal.
  • the PSCell picks 0 or at least one of the 0 or at least one cell, and together with the PSCell constitutes a PSCell Group of each terminal.
  • Each cell in at least one cell works on an unlicensed carrier.
  • SCell #1 is configured on the unlicensed carrier 1
  • SCell #2 is configured on the unlicensed carrier 2
  • unlicensed carrier 3 is configured.
  • SCell #3... SCell#M is configured on the unlicensed carrier M, and then the PSCell picks out 0 or at least one SCell and PSCell together to form a PSCell Group for each terminal.
  • the number of cells in the PSCell Group can have an upper limit, such as a maximum of 2, 3, or other values.
  • the PSCell Group is independent, that is, the PSCell Group of different users can be the same or different.
  • the SCell is first selected to form the SCell Group, and one or more of the SCells are further selected from the SCell Group to form the PSCell Group.
  • the SCell when the SCell is selected, it can be selected by using Event A3, Event A4, Event A5, and the like of LTE.
  • the neighboring cell when Event A3 is used, if the quality of service of the neighboring cell is higher than the quality of service of the current serving cell, the neighboring cell is added to the SCell Group; when Event A4 is used, if the quality of service of the neighboring cell is higher than a certain threshold. The neighboring cell is added to the SCell Group. When the service quality of the serving cell is lower than a threshold and the service command of the neighboring cell is higher than a threshold, the neighboring cell is added to the SCell Group.
  • All SCells are sorted in descending order, and the ordering criteria are: RSRP/RSRQ from large to small and/or channel occupancy from low to high.
  • the SCells that are ranked first and satisfy the predetermined condition are sequentially selected as PSCell #1, PSCell #2, . . . until the selected PSCell reaches the maximum number or all SCells are selected.
  • the predetermined condition is that the RSRP/RSRQ is greater than a threshold, and/or the channel occupancy is less than a threshold.
  • the PSCell is removed from the PSCell Group.
  • the PCell Group or PSCell Group sends the MIB.
  • Each PCell in the PCell Group independently performs LBT channel detection (different PCells can use the same LBT mechanism or different LBT mechanisms). If multiple PCell channel detections are idle, only one PCell is required for MIB at the same time. Send.
  • the priority of the PCell that sends the MIB can be pre-defined. For example, the PCell with the lowest number sends the MIB preferentially. Here, the PCell with the lowest number indicates the PCell with the largest RSRP/RSRQ and/or the lowest channel occupancy.
  • each PSCell in the PSCell Group independently performs LBT channel detection (different PSCells can use the same LBT mechanism or different LBT mechanisms). If multiple PSCell channel detections are idle, only one PSCell is needed at the same time.
  • the MIB is sent.
  • the priority of the PSCell that sends the MIB may be predefined, for example, the PSCell with the lowest number preferentially sends the MIB.
  • the PSCell with the lowest number indicates the PSCell with the largest RSRP/RSRQ and/or the lowest channel occupancy.
  • Manner 1 The MIB is repeatedly transmitted in a small cycle, for example, the MIB is repeatedly transmitted in a period of 5 ms or 10 ms. This method is applicable to both PCell in the PCell Group and PSCell in the PSCell Group.
  • Manner 2 The sending time of different PCells in which the channel is idle is detected in the PCell Group staggered to send the MIB. For example, PCell#1 is sent in subframe#0; PCell#2 is sent in subframe#5, which can prevent other devices from using carrier aggregation, and some carriers may be occupied at certain times and the MIB cannot be sent. .
  • the transmission time of different PSCells in the PSCell Group that detect that the channel is idle is staggered to transmit the MIB.
  • PSCell#1 is sent in subframe#0;
  • PSCell#2 is sent in subframe#5, which can also prevent other devices from using carrier aggregation, and some carriers may be occupied at certain times, resulting in failure to send MIB. problem.
  • the LBT mechanism for transmitting the MIB can perform narrowband channel detection. In addition, in order to improve the transmission probability, it can be sent on any consecutive 6 RBs. Then, if any PCell in the PCell Group or an unlicensed carrier where any PSCell in the PSCell Group is located, as long as 6 consecutive RBs are idle, Send the MIB.
  • the 6RB can give certain restrictions.
  • the RB number of the multiple of 6 is the starting position of the 6 RB.
  • the encoding of the 6RB can be 0 ⁇ 5, 6 ⁇ 11, 12 ⁇ 17, and the like.
  • the MIB transmission time can be redesigned.
  • the MIB transmission time can be set to be less than or equal to the duration of the four symbols.
  • the MIB transmission time is 2 symbols. duration.
  • the LBT mechanism of any cell in the PCell Group or PSCell Group mainly includes the following two:
  • the primary information block is transmitted within the remaining duration in the subframe n;
  • the primary information block is transmitted in the subframe n;
  • a cell performs channel detection for 25 ⁇ s in the front end of subframe #0, and if the detection channel is idle, the MIB is transmitted at the next time of subframe #0. Or a certain cell performs channel detection for 25 ⁇ s at the last end of subframe #9 in front of subframe #0. If the detection channel is idle, the MIB is transmitted at subframe #0.
  • this 25 ⁇ s channel detection time is divided into 16 ⁇ s and 9 ⁇ s, and the 25 ⁇ s channel idle indicates that the first 9 ⁇ s channel in 16 ⁇ s is continuously idle; and any 4 ⁇ s channel in 9 ⁇ s continues to be idle.
  • a random number is selected from 0 to the contention window, where M is a positive integer
  • the channel detection is continued in units of 9 ⁇ s. If the channel is busy, the value of the random number is unchanged, and when the duration of the downlink channel is continuously idle is 16 ⁇ s+M ⁇ 9 ⁇ s, The value of the random number is decreased by 1; if the channel is detected to be idle, the value of the random number is decreased by 1;
  • Fig. 5 shows a schematic block diagram of a communication device in accordance with a third embodiment of the present invention.
  • a communication apparatus includes a processor 1 and a memory 2.
  • the processor 1 and the memory 2 may be connected by a bus 3 or other means, and the connection by the bus 3 is exemplified in FIG.
  • the memory 2 is used to store a set of program codes, and the processor 1 calls the program code stored in the memory 2 for performing the following operations:
  • the primary information block is transmitted to each of the terminals by the primary cell group or the primary secondary cell group.
  • the processor 1 calls the program code stored in the memory 2, and is also used to perform the following operations:
  • the primary serving cell selects at least one of the at least one serving cell as the primary secondary cell of the secondary terminal on the secondary base station to form each terminal on the secondary base station.
  • Primary secondary cell group
  • the processor 1 calls the program code stored in the memory 2, and is also used to perform the following operations:
  • the primary serving cell of the primary base station operating on the licensed frequency band the primary secondary serving cell operating on the unlicensed frequency band to the secondary base station, and the primary secondary serving service cell is in the terminal Configuring a secondary base station to configure 0 or at least one cell operating on an unlicensed frequency band, where the 0 or at least one cell and the primary secondary serving cell form the at least one serving cell,
  • the primary auxiliary serving cell selects at least one of the at least one serving cell as the primary secondary cell of the secondary terminal on the secondary base station, to form each terminal on the secondary base station.
  • Primary secondary cell group selects at least one of the at least one serving cell as the primary secondary cell of the secondary terminal on the secondary base station, to form each terminal on the secondary base station.
  • the processor 1 calls the program code stored in the memory 2, and is also used to perform the following operations:
  • the primary serving cell constitutes the at least one serving cell
  • the primary serving cell selects at least one of the at least one serving cell as the primary cell of each terminal to form a primary cell group of each terminal.
  • the processor 1 calls the program code stored in the memory 2, specifically for performing the following operations:
  • the primary information block is transmitted by the primary cell group or the primary secondary cell group that detects the downlink channel idle.
  • the processor 1 calls the program code stored in the memory 2, and is also used to perform the following operations:
  • the primary information block is sent by one of the multiple cells or multiple cells at the same time.
  • the processor 1 calls the program code stored in the memory 2, and is also used to perform the following operations:
  • the multiple cells are controlled to send the primary information block at different time points.
  • Fig. 6 shows a schematic block diagram of a communication device in accordance with a fourth embodiment of the present invention.
  • a communication apparatus includes a processor 1', a memory 2', and an input device 4'.
  • the processor 1', the memory 2' and the input device 4' may be connected by a bus 3' or other means, as exemplified by the connection through the bus 3' in FIG.
  • the memory 2' is used to store a set of program codes, and the processor 1' calls the program code stored in the memory 2' for performing the following operations:
  • Determining a primary cell group or a primary secondary cell group operating on an unlicensed carrier wherein the primary cell group or the primary secondary cell group is selected from at least one serving cell operating on an unlicensed carrier Composed, each of the serving cells operates on an unlicensed carrier.
  • the main information block transmitted by the cell in the primary cell group or the primary secondary cell group is received by the input device 4'.
  • the units in the communication device of the embodiment of the present invention may be combined, divided, and deleted according to actual needs.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read Only Memory
  • OTPROM One-Time Programmable Read-Only Memory
  • EEPROM Electronically-Erasable Programmable Read-Only Memory
  • CD-ROM Compact Disc Read-Only Memory
  • the present invention proposes a new communication scheme, which can improve the transmission probability of the main information block on the primary cell group or the primary secondary cell group in the unlicensed frequency band.
  • the user can ensure that the MIB is received in time to perform time synchronization according to the system frame number in the MIB, thereby ensuring normal communication and meeting the delay and efficiency requirements of the communication.

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Abstract

本发明提供了一种通信方法和通信装置，其中，通信方法包括：向每个终端配置至少一个服务小S区，每个所述服务小区工作在一个非授权载波上；从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区或主辅助小区，以组成所述每个终端的主小区群组或主辅助小区群组；通过所述主小区群组或主辅助小区群组向所述每个终端发送主要信息块。本发明的技术方案可以提高非授权频段上的主小区群组或主辅助小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。

Description

通信方法和通信装置
本申请要求于2016年9月9日提交中国专利局，申请号为201610818897.8、发明名称为“通信方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，具体而言，涉及一种通信方法和一种通信装置。
背景技术
随着通信业务量的急剧增加，3GPP授权频谱显得越来越不足以提供更高的网络容量。因此3GPP提出了LAA（LTE Assisted Access，LTE辅助接入）的概念，用于借助LTE授权频谱的帮助来使用非授权频谱，LAA方案是基于载波聚合的功能来将LTE系统部署在非授权频段。
同时，非授权频谱可以有两种工作方式，一种是补充下行（SDL，Supplemental Downlink），即只有下行传输子帧；另一种是TDD模式，既包含下行子帧、也包含上行子帧。补充下行这种情况只能是借助载波聚合技术使用。而TDD模式除了可以借助载波聚合技术使用外，还可以借助DC （Dual Connectivity，双连通）使用，也可以独立使用。
现有方案只讨论了非授权频谱与LTE授权频谱使用载波聚合的方式进行工作时的各种问题，没有讨论使用双连接的方式进行工作时的问题。在很多情况下，非授权频谱部署的基站与授权频谱所在基站之间的连接是非理想的，只能使用双连接的方式。
在双连接的情况下，SeNB（Secondary eNB，辅基站）需要有一个PSCell （Primary Secondary cell，主辅助小区）来提供PCell（Primary cell，主小区）的部分功能，比如MIB（Master Information Block，主要信息块）的发送。MIB主要包含的信息是SFN（System Frame Number，系统帧号）、下行带宽和PHICH（Physical Hybrid ARQ Indicator Channel，物理HARQ指示信道）配置等，其中只有系统帧号是不能由PCell发送的。并且MIB是以40ms为周期进行发送的，每40ms内重复发送4次，第一次是在系统帧号为4的倍数的无线帧中的subframe#0发送，接下来的三个无线帧中的subframe#0重复第一个无线帧中的subframe#0发送的内容。在下一个40ms内的发送内容可以与之前40ms内的发送内容不同。
此外，在非授权频谱上，也可以部署工作在非授权载波上的PCell，即非授权频谱上的小区独立工作（即standalone），以实现对通信的控制。
但是，由于非授权频谱的占用需要采用先听后说（即Listen Before Talk，简称LBT）的机制，如果信道被其它设备占用，则无法正常发送MIB，进而会导致用户无法正常接收MIB的系统帧号而无法进行时间同步，从而造成通信无法正常进行。
发明内容
本发明正是基于上述技术问题至少之一，提出了一种新的通信方案，可以提高非授权频段上的主小区群组或主辅助小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
有鉴于此，根据本发明的第一方面，提出了一种通信方法，包括以下步骤：向每个终端配置至少一个服务小区，每个所述服务小区工作在一个非授权载波上；从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区或主辅助小区，以组成所述每个终端的主小区群组或主辅助小区群组；通过所述主小区群组或主辅助小区群组向所述每个终端发送主要信息块。
在该技术方案中，当从工作在非授权频段上的至少一个服务小区中选出至少一个作为每个终端的主小区，以组成每个终端的主小区群组，进而通过该主小区群组来向每个终端发送主要信息块时，是非授权频段独立工作、且在非授权频段上部署主小区的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此通过由主小区群组来向每个终端发送主要信息块，可以提高每个终端的主小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
当从工作在非授权频段上的至少一个服务小区中选出至少一个作为每个终端的主辅助小区，以组成每个终端的主辅助小区群组，进而通过该主辅助小区群组来向每个终端发送主要信息块时，是在非授权频段和授权频段上进行双连接的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此通过由主辅助小区群组来向每个终端发送主要信息块，可以提高每个终端的主辅助小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
对于如何配置上述至少一个服务小区以及如何选择并组成每个终端的主小区群组或主辅助小区群组，本发明提出了如下三个方案：
方案一：
工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置所述至少一个服务小区，其中，所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
方案一适用于非授权频段和授权频段以双连接的方式进行通信的场景，即由工作在授权频段上的主基站的主服务小区来向每个终端在辅基站上配置至少一个服务小区，并由主服务小区来选择并组成每个终端在辅基站上的主辅助小区群组。
方案二：
工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置工作在非授权频段上的主辅助服务小区，所述主辅助服务小区向所述每个终端在所述辅基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主辅助服务小区组成所述至少一个服务小区，其中，所述主辅助服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
方案二也适用于非授权频段和授权频段以双连接的方式进行通信的场景，即由工作在授权频段上的主基站的主服务小区来向每个终端在辅基站上配置主辅助服务小区，进而由主辅助服务小区向每个终端在辅基站上配置工作在非授权频段上的0个或至少一个小区，这0个或至少一个小区和主辅助服务小区共同组成了上述至少一个服务小区，然后由主辅助服务小区来选择并组成每个终端在辅基站上的主辅助小区群组。
进一步地，在所述主辅助服务小区为多个的情况下，向所述每个终端配置所述0个或至少一个小区的配置信令由所述主辅助服务小区中的一个或多个发送。其中，所述的配置信令可以是RRC（Radio Resource Control，无线资源控制）信令。
方案三：
工作在非授权频段上的主基站的主服务小区向所述每个终端在所述主基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主服务小区组成所述至少一个服务小区，其中，所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区，以组成所述每个终端的主小区群组。
方案三适用于非授权频段独立工作、且在非授权频段上部署主小区的通信场景，即由非授权频段上的主基站的主服务小区向每个终端在主基站上配置工作在非授权频段上的0个或至少一个小区，这0个或至少一个小区和主服务小区共同组成了上述至少一个服务小区，然后由主服务小区来选择并组成每个终端的主小区群组。
在上述任一技术方案中，优选地，通过所述主小区群组或主辅助小区群组向所述每个终端发送主要信息块的步骤，具体包括：通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送所述主要信息块。
在该技术方案中，由于在非授权频段上需要考虑到与其它系统（如Wi-Fi系统）的共存，即在非授权频段工作时需要引入LBT机制，因此需要通过主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送主要信息块。
在上述任一技术方案中，优选地，所述的通信方法还包括：若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则在同一时间仅通过所述多个小区中的至少一个小区发送所述主要信息块。
在该技术方案中，在多个小区检测到下行信道空闲时，可以由一个小区或由多个小区来发送主要信息块。
在上述任一技术方案中，优选地，所述的通信方法还包括：若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则控制所述多个小区在不同的时间点分别发送所述主要信息块。
在该技术方案中，通过控制检测到下行信道空闲的多个小区在不同的时间点分别发送主要信息块，可以增加主要信息块的发送机会，进而保证用户能够及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行。
在上述任一技术方案中，优选地，发送所述主要信息块的小区以5ms或10ms为周期进行发送。
在该技术方案中，通过以5ms或10ms（即较小的周期）为周期发送主要信息块，同样可以增加主要信息块的发送机会，进而保证用户能够及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行。
在上述任一技术方案中，优选地，若所述主小区群组或主辅助小区群组中的任一个小区检测到在有限的频域上连续的6个资源块对应的下行信道空闲，则确定检测到下行信道空闲。其中，所述有限的频域的带宽小于或等于所述任一个小区的带宽，且大于或等于6个资源块。
在该技术方案中，由于主要信息块的发送只需占用6个资源块（Resource Block，简称RB），因此主小区群组或主辅助小区群组中的小区可以进行窄带的信道检测，即只要检测到在指定的有限的频域上连续的6个资源块对应的下行信道空闲，就可以确定检测到下行信道空闲。
其中，为了降低用户设备检测及接收主要信息块的复杂度，减少有限的频域的带宽大小，进一步可以预定义上述连续的每6个资源块的编号，即上述连续的每6个资源块的编号为预定义的资源块编号，这样使得用户设备能够在定义好的位置来检测及接收主要信息块，降低了用户设备的检测及接收复杂度。
在上述任一技术方案中，优选地，由于主要信息块可以仅发送系统帧号，因此主要信息块的发送时长可以设置为大于或等于1个符号（Symbol）所占用的时长，且小于或等于4个符号所占用的时长。
在上述任一技术方案中，优选地，通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的任一小区发送所述主要信息块的步骤，具体包括：
若所述任一小区在子帧n的起始位置进行16μs+M×9μs的one shot信道检测过程检测到信道空闲，则在所述子帧n中的剩余时长内发送所述主要信息块；或
若所述任一小区在子帧n之前的子帧的末尾位置进行16μs+M×9μs的one shot信道检测时检测到信道空闲，则在所述子帧n中发送所述主要信息块；
其中，M=1或2。
在上述任一技术方案中，优选地，所述主小区群组或主辅助小区群组中的任一小区进行下行信道检测的过程，具体包括：
在检测到信道持续空闲的时长达到16μs+M×9μs之后，从0至竞争窗口之间选取随机数，其中，M为正整数；
在选取所述随机数后继续以9μs为单位进行信道检测，若检测到信道忙，则所述随机数的值不变，并在检测到下行信道持续空闲的时长达到16μs+M×9μs时，所述随机数的值减1；若检测到信道空闲，则所述随机数的值减1；
在所述随机数的值减为0时，确定能够占用所述信道。
根据本发明的第二方面，还提出了一种通信装置，包括：配置单元，设置为向每个终端配置至少一个服务小区，每个所述服务小区工作在一个非授权载波上；选择单元，设置为从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区或主辅助小区，以组成所述每个终端的主小区群组或主辅助小区群组；通信控制单元，设置为通过所述主小区群组或主辅助小区群组向所述每个终端发送主要信息块。
在该技术方案中，当从工作在非授权频段上的至少一个服务小区中选出至少一个作为每个终端的主小区，以组成每个终端的主小区群组，进而通过该主小区群组来向每个终端发送主要信息块时，是非授权频段独立工作、且在非授权频段上部署主小区的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此通过由主小区群组来向每个终端发送主要信息块，可以提高每个终端的主小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
当从工作在非授权频段上的至少一个服务小区中选出至少一个作为每个终端的主辅助小区，以组成每个终端的主辅助小区群组，进而通过该主辅助小区群组来向每个终端发送主要信息块时，是在非授权频段和授权频段上进行双连接的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此通过由主辅助小区群组来向每个终端发送主要信息块，可以提高每个终端的主辅助小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
对于配置单元如何配置上述至少一个服务小区以及选择单元如何选择并组成每个终端的主小区群组或主辅助小区群组，本发明提出了如下三个方案：
方案一：
所述配置单元具体设置为，通过工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置所述至少一个服务小区；所述选择单元具体设置为，通过所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
方案一适用于非授权频段和授权频段以双连接的方式进行通信的场景，即由工作在授权频段上的主基站的主服务小区来向每个终端在辅基站上配置至少一个服务小区，并由主服务小区来选择并组成每个终端在辅基站上的主辅助小区群组。
方案二：
所述配置单元具体设置为，通过工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置工作在非授权频段上的主辅助服务小区，所述主辅助服务小区向所述每个终端在所述辅基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主辅助服务小区组成所述至少一个服务小区；所述选择单元具体设置为，通过所述主辅助服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
方案二也适用于非授权频段和授权频段以双连接的方式进行通信的场景，即由工作在授权频段上的主基站的主服务小区来向每个终端在辅基站上配置主辅助服务小区，进而由主辅助服务小区向每个终端在辅基站上配置工作在非授权频段上的0个或至少一个小区，这0个或至少一个小区和主辅助服务小区共同组成了上述至少一个服务小区，然后由主辅助服务小区来选择并组成每个终端在辅基站上的主辅助小区群组。
进一步地，在所述主辅助服务小区为多个的情况下，向所述每个终端配置所述0个或至少一个小区的配置信令由所述主辅助服务小区中的一个或多个发送。其中，所述的配置信令可以是RRC信令。
方案三：
所述配置单元具体设置为，通过工作在非授权频段上的主基站的主服务小区向所述每个终端在所述主基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主服务小区组成所述至少一个服务小区；所述选择单元具体设置为，通过所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区，以组成所述每个终端的主小区群组。
方案三适用于非授权频段独立工作、且在非授权频段上部署主小区的通信场景，即由非授权频段上的主基站的主服务小区向每个终端在主基站上配置工作在非授权频段上的0个或至少一个小区，这0个或至少一个小区和主服务小区共同组成了上述至少一个服务小区，然后由主服务小区来选择并组成每个终端的主小区群组。
在上述任一技术方案中，优选地，所述通信控制单元具体设置为：通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送所述主要信息块。
在该技术方案中，由于在非授权频段上需要考虑到与其它系统（如Wi-Fi系统）的共存，即在非授权频段工作时需要引入LBT机制，因此需要通过主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送主要信息块。
在上述任一技术方案中，优选地，所述通信控制单元具体还设置为：若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则在同一时间仅通过所述多个小区中的至少一个小区发送所述主要信息块。
在该技术方案中，在多个小区检测到下行信道空闲时，可以由一个小区或由多个小区来发送主要信息块。
在上述任一技术方案中，优选地，所述通信控制单元具体还设置为：若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则控制所述多个小区在不同的时间点分别发送所述主要信息块。
在该技术方案中，通过控制检测到下行信道空闲的多个小区在不同的时间点分别发送主要信息块，可以增加主要信息块的发送机会，进而保证用户能够及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行。
在上述任一技术方案中，优选地，发送所述主要信息块的小区以5ms或10ms为周期进行发送。
在该技术方案中，通过以5ms或10ms（即较小的周期）为周期发送主要信息块，同样可以增加主要信息块的发送机会，进而保证用户能够及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行。
在上述任一技术方案中，优选地，若所述主小区群组或主辅助小区群组中的任一个小区检测到在有限的频域上连续的6个资源块对应的下行信道空闲，则确定检测到下行信道空闲。其中，所述有限的频域的带宽小于或等于所述任一个小区的带宽、且大于或等于6个资源块。
在该技术方案中，由于主要信息块的发送只需占用6个资源块，因此主小区群组或主辅助小区群组中的小区可以进行窄带的信道检测，即只要检测到在指定的有限的频域上连续的6个资源块对应的下行信道空闲，就可以确定检测到下行信道空闲。
其中，为了降低用户设备检测及接收主要信息块的复杂度，减少有限的频域的带宽大小，进一步可以预定义上述连续的每6个资源块的编号，即上述连续的每6个资源块的编号为预定义的资源块编号，这样使得用户设备能够在定义好的位置来检测及接收主要信息块，降低了用户设备的检测及接收复杂度。
在上述任一技术方案中，优选地，由于主要信息块可以仅发送系统帧号，因此主要信息块的发送时长可以设置为大于或等于1个符号（Symbol）所占用的时长，且小于或等于4个符号所占用的时长。
在上述任一技术方案中，优选地，所述通信控制单元通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的任一小区发送所述主要信息块的操作，具体包括：
若所述任一小区在子帧n的起始位置进行16μs+M×9μs的one shot信道检测过程检测到信道空闲，则通过所述任一小区在所述子帧n中的剩余时长内发送所述主要信息块；或
若所述任一小区在子帧n之前的子帧的末尾位置进行16μs+M×9μs的one shot信道检测时检测到信道空闲，则通过所述任一小区在所述子帧n中发送所述主要信息块；
其中，M=1或2。
在上述任一技术方案中，优选地，所述主小区群组或主辅助小区群组中的任一小区进行下行信道检测的过程，具体包括：
在检测到信道持续空闲的时长达到16μs+M×9μs之后，从0至竞争窗口之间选取随机数，其中，M为正整数；
在选取所述随机数后继续以9μs为单位进行信道检测，若检测到信道忙，则所述随机数的值不变，并在检测到下行信道持续空闲的时长达到16μs+M×9μs时，所述随机数的值减1；若检测到信道空闲，则所述随机数的值减1；
在所述随机数的值减为0时，确定能够占用所述信道。
根据本发明的第三方面，还提出了一种通信方法，包括：终端确定工作在非授权载波上的主小区群组或主辅助小区群组；接收所述主小区群组或主辅助小区群组中的小区发送的主要信息块；其中，所述主小区群组或主辅助小区群组是从工作在非授权载波上的至少一个服务小区中进行选择而组成的，每个所述服务小区工作在一个非授权载波上。
在该技术方案中，当从工作在非授权频段上的至少一个服务小区中选择组成主小区群组时，是非授权频段独立工作、且在非授权频段上部署主小区的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此终端通过接收主小区群组中的小区发送的主要信息块，可以提高主小区群组向终端发送主要信息块的概率，进而可以保证终端及时接收到主要信息块，满足了通信的时延和效率要求。
当从工作在非授权频段上的至少一个服务小区中选择组成主辅助小区群组时，是在非授权频段和授权频段上进行双连接的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此终端通过接收主辅助小区群组中的小区发送的主要信息块，可以提高主辅助小区群组向终端发送主要信息块的概率，进而可以保证终端及时接收到主要信息块，满足了通信的时延和效率要求。
其中，终端确定工作在非授权载波上的主辅助小区群组可以是通过接收授权频段上的主基站的主服务小区或非授权频段上的辅基站的主辅助小区发送的通知信令来确定的。
根据本发明的第四方面，还提出了一种通信装置，包括：确定单元，设置为确定工作在非授权载波上的主小区群组或主辅助小区群组，其中，所述主小区群组或主辅助小区群组是从工作在非授权载波上的至少一个服务小区中进行选择而组成的，每个所述服务小区工作在一个非授权载波上；接收单元，设置为接收所述主小区群组或主辅助小区群组中的小区发送的主要信息块。
在该技术方案中，当从工作在非授权频段上的至少一个服务小区中选择组成主小区群组时，是非授权频段独立工作、且在非授权频段上部署主小区的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此终端通过接收主小区群组中的小区发送的主要信息块，可以提高主小区群组向终端发送主要信息块的概率，进而可以保证终端及时接收到主要信息块，满足了通信的时延和效率要求。
当从工作在非授权频段上的至少一个服务小区中选择组成主辅助小区群组时，是在非授权频段和授权频段上进行双连接的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此终端通过接收主辅助小区群组中的小区发送的主要信息块，可以提高主辅助小区群组向终端发送主要信息块的概率，进而可以保证终端及时接收到主要信息块，满足了通信的时延和效率要求。
其中，终端确定工作在非授权载波上的主辅助小区群组可以是通过接收授权频段上的主基站的主服务小区或非授权频段上的辅基站的主辅助小区发送的通知信令来确定的。
通过以上技术方案，可以提高非授权频段上的主小区群组或主辅助小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
 附图说明
图1示出了根据本发明的第一个实施例的通信方法的示意流程图；
图2示出了根据本发明的第一个实施例的通信装置的示意框图；
图3示出了根据本发明的第二个实施例的通信方法的示意流程图；
图4示出了根据本发明的第二个实施例的通信装置的示意框图；
图5示出了根据本发明的第三个实施例的通信装置的示意框图；
图6示出了根据本发明的第四个实施例的通信装置的示意框图。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。
图1示出了根据本发明的第一个实施例的通信方法的示意流程图。
如图1所示，根据本发明的第一个实施例的通信方法，包括以下步骤：
步骤S10，向每个终端配置至少一个服务小区，每个所述服务小区工作在一个非授权载波上。
步骤S12，从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区或主辅助小区，以组成所述每个终端的主小区群组或主辅助小区群组。
对于步骤S10中如何配置上述至少一个服务小区以及步骤S12中如何选择并组成每个终端的主小区群组或主辅助小区群组，本发明提出了如下三个方案：
方案一：
工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置所述至少一个服务小区，其中，所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
方案一适用于非授权频段和授权频段以双连接的方式进行通信的场景，即由工作在授权频段上的主基站的主服务小区来向每个终端在辅基站上配置至少一个服务小区，并由主服务小区来选择并组成每个终端在辅基站上的主辅助小区群组。
方案二：
工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置工作在非授权频段上的主辅助服务小区，所述主辅助服务小区向所述每个终端在所述辅基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主辅助服务小区组成所述至少一个服务小区，其中，所述主辅助服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
方案二也适用于非授权频段和授权频段以双连接的方式进行通信的场景，即由工作在授权频段上的主基站的主服务小区来向每个终端在辅基站上配置主辅助服务小区，进而由主辅助服务小区向每个终端在辅基站上配置工作在非授权频段上的0个或至少一个小区，这0个或至少一个小区和主辅助服务小区共同组成了上述至少一个服务小区，然后由主辅助服务小区来选择并组成每个终端在辅基站上的主辅助小区群组。
进一步地，在所述主辅助服务小区为多个的情况下，向所述每个终端配置所述0个或至少一个小区的配置信令由所述主辅助服务小区中的一个或多个发送。其中，所述的配置信令可以是RRC信令。
方案三：
工作在非授权频段上的主基站的主服务小区向所述每个终端在所述主基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主服务小区组成所述至少一个服务小区，其中，所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区，以组成所述每个终端的主小区群组。
方案三适用于非授权频段独立工作、且在非授权频段上部署主小区的通信场景，即由非授权频段上的主基站的主服务小区向每个终端在主基站上配置工作在非授权频段上的0个或至少一个小区，这0个或至少一个小区和主服务小区共同组成了上述至少一个服务小区，然后由主服务小区来选择并组成每个终端的主小区群组。
图1所示的通信方法还包括：
步骤S14，通过所述主小区群组或主辅助小区群组向所述每个终端发送主要信息块。
以下详细介绍主小区群组或主辅助小区群组向每个终端发送主要信息块的过程：
在本发明的一个实施例中，步骤S14具体包括：通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送所述主要信息块。
在该技术方案中，由于在非授权频段上需要考虑到与其它系统（如Wi-Fi系统）的共存，即在非授权频段工作时需要引入LBT机制，因此需要通过主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送主要信息块。
进一步地，若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则在同一时间仅通过所述多个小区中的至少一个小区发送所述主要信息块。
在该技术方案中，在多个小区检测到下行信道空闲时，可以由一个小区或由多个小区来发送主要信息块。
进一步地，所述的通信方法还包括：若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则控制所述多个小区在不同的时间点分别发送所述主要信息块。
在该技术方案中，通过控制检测到下行信道空闲的多个小区在不同的时间点分别发送主要信息块，可以增加主要信息块的发送机会，进而保证用户能够及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行。
在上述任一技术方案中，优选地，发送所述主要信息块的小区以5ms或10ms为周期进行发送。
在该技术方案中，通过以5ms或10ms（即较小的周期）为周期发送主要信息块，同样可以增加主要信息块的发送机会，进而保证用户能够及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行。
在上述任一技术方案中，优选地，若所述主小区群组或主辅助小区群组中的任一个小区检测到在有限的频域上连续的6个资源块对应的下行信道空闲，则确定检测到下行信道空闲。其中，所述有限的频域的带宽小于或等于所述任一个小区的带宽、且大于或等于6个资源块。
在该技术方案中，由于主要信息块的发送只需占用6个资源块，因此主小区群组或主辅助小区群组中的小区可以进行窄带的信道检测，即只要检测到在指定的有限的频域上连续的6个资源块对应的下行信道空闲，就可以确定检测到下行信道空闲。
其中，为了降低用户设备检测及接收主要信息块的复杂度，可以预定义上述连续的每6个资源块的编号，即上述连续的每6个资源块的编号为预定义的资源块编号，这样使得用户设备能够在定义好的位置来检测及接收主要信息块，降低了用户设备的检测及接收复杂度。
在上述任一技术方案中，优选地，由于主要信息块可以仅发送系统帧号，因此主要信息块的发送时长可以设置为大于或等于1个符号（Symbol）所占用的时长，且小于或等于4个符号所占用的时长。
其中，主小区群组或主辅助小区群组中的任一小区进行信道检测的机制主要包括如下两个：
信道检测机制一：
若任一小区在子帧n的起始位置进行16μs+M×9μs的one shot信道检测过程检测到信道空闲，则在所述子帧n中的剩余时长内发送所述主要信息块；或
若任一小区在子帧n之前的子帧的末尾位置进行16μs+M×9μs的one shot信道检测时检测到信道空闲，则在所述子帧n中发送所述主要信息块；
其中，M=1或2。
信道检测机制二：
在检测到信道持续空闲的时长达到16μs+M×9μs之后，从0至竞争窗口之间选取随机数，其中，M为正整数；
在选取所述随机数后继续以9μs为单位进行信道检测，若检测到信道忙，则所述随机数的值不变，并在检测到下行信道持续空闲的时长达到16μs+M×9μs时，所述随机数的值减1；若检测到信道空闲，则所述随机数的值减1；
在所述随机数的值减为0时，确定能够占用所述信道。
在图1所示的通信方法中，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此通过由主小区群组或主辅助小区群组来向每个终端发送主要信息块，可以提高每个终端的主小区群组或主辅助小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
图2示出了根据本发明的第一个实施例的通信装置的示意框图。
如图2所示，根据本发明的第一个实施例的通信装置200，包括：配置单元202、选择单元204和通信控制单元206。
其中，配置单元202设置为向每个终端配置至少一个服务小区，每个所述服务小区工作在一个非授权载波上；选择单元204设置为从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区或主辅助小区，以组成所述每个终端的主小区群组或主辅助小区群组；通信控制单元206设置为通过所述主小区群组或主辅助小区群组向所述每个终端发送主要信息块。
在该技术方案中，当从工作在非授权频段上的至少一个服务小区中选出至少一个作为每个终端的主小区，以组成每个终端的主小区群组，进而通过该主小区群组来向每个终端发送主要信息块时，是非授权频段独立工作、且在非授权频段上部署主小区的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此通过由主小区群组来向每个终端发送主要信息块，可以提高每个终端的主小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
当从工作在非授权频段上的至少一个服务小区中选出至少一个作为每个终端的主辅助小区，以组成每个终端的主辅助小区群组，进而通过该主辅助小区群组来向每个终端发送主要信息块时，是在非授权频段和授权频段上进行双连接的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此通过由主辅助小区群组来向每个终端发送主要信息块，可以提高每个终端的主辅助小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
对于配置单元202如何配置上述至少一个服务小区以及选择单元204如何选择并组成每个终端的主小区群组或主辅助小区群组，本发明提出了如下三个方案：
方案一：
所述配置单元202具体设置为，通过工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置所述至少一个服务小区；所述选择单元204具体设置为，通过所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
方案一适用于非授权频段和授权频段以双连接的方式进行通信的场景，即由工作在授权频段上的主基站的主服务小区来向每个终端在辅基站上配置至少一个服务小区，并由主服务小区来选择并组成每个终端在辅基站上的主辅助小区群组。
方案二：
所述配置单元202具体设置为，通过工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置工作在非授权频段上的主辅助服务小区，所述主辅助服务小区向所述每个终端在所述辅基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主辅助服务小区组成所述至少一个服务小区；所述选择单元204具体设置为，通过所述主辅助服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
方案二也适用于非授权频段和授权频段以双连接的方式进行通信的场景，即由工作在授权频段上的主基站的主服务小区来向每个终端在辅基站上配置主辅助服务小区，进而由主辅助服务小区向每个终端在辅基站上配置工作在非授权频段上的0个或至少一个小区，这0个或至少一个小区和主辅助服务小区共同组成了上述至少一个服务小区，然后由主辅助服务小区来选择并组成每个终端在辅基站上的主辅助小区群组。
进一步地，在所述主辅助服务小区为多个的情况下，向所述每个终端配置所述0个或至少一个小区的配置信令由所述主辅助服务小区中的一个或多个发送。其中，所述的配置信令可以是RRC信令。
方案三：
所述配置单元202具体设置为，通过工作在非授权频段上的主基站的主服务小区向所述每个终端在所述主基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主服务小区组成所述至少一个服务小区；所述选择单元204具体设置为，通过所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区，以组成所述每个终端的主小区群组。
方案三适用于非授权频段独立工作、且在非授权频段上部署主小区的通信场景，即由非授权频段上的主基站的主服务小区向每个终端在主基站上配置工作在非授权频段上的0个或至少一个小区，这0个或至少一个小区和主服务小区共同组成了上述至少一个服务小区，然后由主服务小区来选择并组成每个终端的主小区群组。
在上述任一技术方案中，优选地，所述通信控制单元206具体设置为：通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送所述主要信息块。
在该技术方案中，由于在非授权频段上需要考虑到与其它系统（如Wi-Fi系统）的共存，即在非授权频段工作时需要引入LBT机制，因此需要通过主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送主要信息块。
进一步地，所述通信控制单元206具体还设置为：若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则在同一时间仅通过所述多个小区中的一个小区或多个小区发送所述主要信息块。
在该技术方案中，在多个小区检测到下行信道空闲时，可以由一个小区或由多个小区来发送主要信息块。
进一步地，所述通信控制单元206具体还设置为：若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则控制所述多个小区在不同的时间点分别发送所述主要信息块。
在该技术方案中，通过控制检测到下行信道空闲的多个小区在不同的时间点分别发送主要信息块，可以增加主要信息块的发送机会，进而保证用户能够及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行。
在上述任一技术方案中，优选地，发送所述主要信息块的小区以5ms或10ms为周期进行发送。
在该技术方案中，通过以5ms或10ms（即较小的周期）为周期发送主要信息块，同样可以增加主要信息块的发送机会，进而保证用户能够及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行。
在上述任一技术方案中，优选地，若所述主小区群组或主辅助小区群组中的任一个小区检测到在有限的频域上连续的6个资源块对应的下行信道空闲，则确定检测到下行信道空闲。其中，所述有限的频域的带宽小于或等于所述任一个小区的带宽、且大于或等于6个资源块。
在该技术方案中，由于主要信息块的发送只需占用6个资源块，因此主小区群组或主辅助小区群组中的小区可以进行窄带的信道检测，即只要检测到在指定的有限的频域上连续的6个资源块对应的下行信道空闲，就可以确定检测到下行信道空闲。
其中，为了降低用户设备检测及接收主要信息块的复杂度，减少有限的频域的带宽大小，可以预定义上述连续的每6个资源块的编号，即上述连续的每6个资源块的编号为预定义的资源块编号，这样使得用户设备能够在定义好的位置来检测及接收主要信息块，降低了用户设备的检测及接收复杂度。
在上述任一技术方案中，优选地，由于主要信息块可以仅发送系统帧号，因此主要信息块的发送时长可以设置为大于或等于1个符号（Symbol）所占用的时长，且小于或等于4个符号所占用的时长。
其中，主小区群组或主辅助小区群组中的任一小区进行信道检测的机制主要包括如下两个：
信道检测机制一：
若任一小区在子帧n的起始位置进行16μs+M×9μs的one shot信道检测过程检测到信道空闲，则通过所述任一小区在所述子帧n中的剩余时长内发送所述主要信息块；或
若所述任一小区在子帧n之前的子帧的末尾位置进行16μs+M×9μs的one shot信道检测时检测到信道空闲，则通过所述任一小区在所述子帧n中发送所述主要信息块；
其中，M=1或2。
信道检测机制二：
在检测到信道持续空闲的时长达到16μs+M×9μs之后，从0至竞争窗口之间选取随机数，其中，M为正整数；
在选取所述随机数后继续以9μs为单位进行信道检测，若检测到信道忙，则所述随机数的值不变，并在检测到下行信道持续空闲的时长达到16μs+M×9μs时，所述随机数的值减1；若检测到信道空闲，则所述随机数的值减1；
在所述随机数的值减为0时，确定能够占用所述信道。
图3示出了根据本发明的第二个实施例的通信方法的示意流程图。
如图3所示，根据本发明的第二个实施例的通信方法，包括以下步骤：
步骤S30，终端确定工作在非授权载波上的主小区群组或主辅助小区群组，其中，所述主小区群组或主辅助小区群组是从工作在非授权载波上的至少一个服务小区中进行选择而组成的，每个所述服务小区工作在一个非授权载波上。
其中，终端确定工作在非授权载波上的主辅助小区群组可以是通过接收授权频段上的主基站的主服务小区或非授权频段上的辅基站的主辅助小区发送的通知信令来确定的。
步骤S32，接收所述主小区群组或主辅助小区群组中的小区发送的主要信息块。
在该技术方案中，当从工作在非授权频段上的至少一个服务小区中选择组成主小区群组时，是非授权频段独立工作、且在非授权频段上部署主小区的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此终端通过接收主小区群组中的小区发送的主要信息块，可以提高主小区群组向终端发送主要信息块的概率，进而可以保证终端及时接收到主要信息块，满足了通信的时延和效率要求。
当从工作在非授权频段上的至少一个服务小区中选择组成主辅助小区群组时，是在非授权频段和授权频段上进行双连接的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此终端通过接收主辅助小区群组中的小区发送的主要信息块，可以提高主辅助小区群组向终端发送主要信息块的概率，进而可以保证终端及时接收到主要信息块，满足了通信的时延和效率要求。
图4示出了根据本发明的第二个实施例的通信装置的示意框图。
如图4所示，根据本发明的第二个实施例的通信装置400，包括：确定单元402和通信单元404。
其中，确定单元402设置为确定工作在非授权载波上的主小区群组或主辅助小区群组，其中，所述主小区群组或主辅助小区群组是从工作在非授权载波上的至少一个服务小区中进行选择而组成的，每个所述服务小区工作在一个非授权载波上；通信单元404设置为接收所述主小区群组或主辅助小区群组中的小区发送的主要信息块。
在该技术方案中，当从工作在非授权频段上的至少一个服务小区中选择组成主小区群组时，是非授权频段独立工作、且在非授权频段上部署主小区的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此终端通过接收主小区群组中的小区发送的主要信息块，可以提高主小区群组向终端发送主要信息块的概率，进而可以保证终端及时接收到主要信息块，满足了通信的时延和效率要求。
当从工作在非授权频段上的至少一个服务小区中选择组成主辅助小区群组时，是在非授权频段和授权频段上进行双连接的通信场景，由于在非授权频段上不能连续占用信道，即存在信道检测机制，因此终端通过接收主辅助小区群组中的小区发送的主要信息块，可以提高主辅助小区群组向终端发送主要信息块的概率，进而可以保证终端及时接收到主要信息块，满足了通信的时延和效率要求。
其中，确定单元402确定工作在非授权载波上的主辅助小区群组可以是通过接收授权频段上的主基站的主服务小区或非授权频段上的辅基站的主辅助小区发送的通知信令来确定的。
综上，本发明的技术方案主要是通过工作在非授权频段上的主小区群组（PCell Group）或主辅助小区群组（PSCell Group）来提高MIB的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
具体地，主要分为以下几个方面：
一、PCell Group或PSCell Group的配置。
1、PCell Group的配置：
工作在非授权频段上的主基站的PCell向每个终端在主基站上配置工作在非授权频段上的0个或至少一个Cell，进而PCell从这0个或至少一个Cell中挑选出0个或至少一个，并与PCell一起组成每个终端的PCell Group。
其中，至少一个Cell中的每个Cell工作在一个非授权载波上，譬如在非授权载波1上配置了Cell#1，在非授权载波2上配置了Cell#2，在非授权载波3上配置了Cell#3……在非授权载波M上配置了Cell#M，进而PCell从中挑选出0个或至少一个Cell与PCell共同组成每个终端的PCell Group。PCell Group中的小区数量可以有一个上限值，如最大为2、3或其它值等。对于不同的用户来说，其PCell Group是独立的，即不同用户的PCell Group可以是一样的也可以是不一样的。
2、PSCell Group的配置，具体分为两种配置方案：
方案1：
工作在授权频段上的主基站（即MeNB）的PCell向每个终端在辅基站（即SeNB）上配置工作在非授权频段上的至少一个服务小区，进而PCell从该至少一个服务小区中选出至少一个作为每个终端在SeNB上的PSCell，以组成每个终端在辅基站上的PSCell Group。
其中，至少一个服务小区中的每个服务小区工作在一个非授权载波上，譬如在非授权载波1上配置了SCell#1，在非授权载波2上配置了SCell#2，在非授权载波3上配置了SCell#3……在非授权载波M上配置了SCell#M，进而PCell从中挑选出至少一个SCell组成每个终端的PSCell Group。PSCell Group中的小区数量可以有一个上限值，如最大为2、3或其它值等。对于不同的用户来说，其PSCell Group是独立的，即不同用户的PSCell Group可以是一样的也可以是不一样的。
方案2：
工作在授权频段上的主基站（即MeNB）的PCell向每个终端在辅基站（即SeNB）上配置工作在非授权频段上的PSCell，进而PSCell向每个终端在SeNB上配置工作在非授权频段上的0个或至少一个小区，进而PSCell从这0个或至少一个小区中挑选出0个或至少一个，并与PSCell一起组成每个终端的PSCell Group。
其中，至少一个小区中的每个小区工作在一个非授权载波上，譬如在非授权载波1上配置了SCell#1，在非授权载波2上配置了SCell#2，在非授权载波3上配置了SCell#3……在非授权载波M上配置了SCell#M，进而PSCell从中挑选出0个或至少一个SCell与PSCell共同组成每个终端的PSCell Group。PSCell Group中的小区数量可以有一个上限值，如最大为2、3或其它值等。对于不同的用户来说，其PSCell Group是独立的，即不同用户的PSCell Group可以是一样的也可以是不一样的。
3、选择PSCell Group中的PSCell的一种具体方式：
首先进行SCell的选择，以组成SCell Group，进而从SCell Group中进一步选择一个或多个作为PSCell，以构成PSCell Group。
其中，在进行SCell的选择时，可以采用LTE的Event A3、Event A4和Event A5等来选择。
譬如，在采用Event A3时，若邻小区的服务质量比当前服务小区的服务质量高时，将邻小区加入SCell Group；在采用Event A4时，若邻小区的服务质量高于一定门限值时，将邻小区加入SCell Group；在采用Event A5时，若服务小区的服务质量低于一个门限值，而邻小区的服务指令高于一个门限值时，将邻小区加入SCell Group。
4、PSCell Group内的PSCell的添加、去除和替换：
（1）PSCell的添加。
将所有的SCell进行降序排序，排序的准则为：RSRP/RSRQ由大到小和/或信道占用率由低到高的顺序。排在最前面的且满足预定条件的SCell依次选为PSCell#1、PSCell#2……，直到选择的PSCell到达最大数目或者所有的SCell选择完为止。其中，预定条件是指RSRP/RSRQ大于一个门限值，和/或信道占用率小于一个门限值。
（2）PSCell的去除。
当PSCell Group内的某个PSCell的RSRP/RSRQ小于某个门限值，和/或信道占用率大于一个门限值时，将该PSCell从PSCell Group内去除。
（3）PSCell的替换
方式一：若某个SCell的RSRP/RSRQ比PSCell Group内的一个PSCell的RSRP/RSRQ高一定值，和/或某个SCell的信道占用率比该PSCell的信道占用率低一定值，则通过该SCell替换该PSCell。
方式二：若某个SCell的RSRP/RSRQ高于门限值1，和/或信道占用率低于门限值2；且PSCell Group内的一个PSCell的RSRP/RSRQ低于门限值3，和/或信道占用率高于门限值4，则通过该SCell替换该PSCell。
5、PCell Group内的PCell的添加、去除和替换的方案类似于PSCell Group内的PSCell的添加、去除和替换的方案，不再赘述。
二、PCell Group或PSCell Group进行MIB的发送。
1、PCell Group中的每个PCell独立进行LBT信道检测（不同PCell可以使用相同的LBT机制，也可以使用不同的LBT机制），若多个PCell信道检测空闲，那么同一时间只需要一个PCell进行MIB的发送。其中，发送MIB的PCell的优先级可以预先定义好，譬如编号最小的PCell优先发送MIB。在此，编号最小的PCell表示的是RSRP/RSRQ最大和/或信道占用率最低的PCell。
类似地，PSCell Group中的每个PSCell独立进行LBT信道检测（不同PSCell可以使用相同的LBT机制，也可以使用不同的LBT机制），若多个PSCell信道检测空闲，那么同一时间只需要一个PSCell进行MIB的发送。其中，发送MIB的PSCell的优先级可以预先定义好，譬如编号最小的PSCell优先发送MIB。在此，编号最小的PSCell表示的是RSRP/RSRQ最大和/或信道占用率最低的PSCell。
2、通过以下两种方式来增强MIB的发送机会：
方式一：以较小的周期来重复发送MIB，譬如以5ms或10ms为周期重复发送MIB。这种方式既适用于PCell Group中的PCell，也适用于PSCell Group中的PSCell。
方式二：PCell Group中检测到信道空闲的不同PCell的发送时间错开发送MIB。比如PCell#1是在subframe#0发送；PCell#2是在subframe#5发送，这样可以避免其它设备在使用载波聚合时，可能出现某些时间多个载波都被占用而导致无法发送MIB的问题。
类似地，PSCell Group中检测到信道空闲的不同PSCell的发送时间错开发送MIB。比如PSCell#1是在subframe#0发送；PSCell#2是在subframe#5发送，这样也可以避免其它设备在使用载波聚合时，可能出现某些时间多个载波都被占用而导致无法发送MIB的问题。
3、由于MIB在发送时只需要占用6RB的资源，那么发送MIB的LBT机制可以进行窄带的信道检测。另外，为了提高发送概率，可以在任意连续的6RB上发送，那么在PCell Group中的任一个PCell或在PSCell Group中的任一个PSCell所在的非授权载波上只要检测到连续的6RB空闲，就可以发送MIB。
但是，这种处理方式会增大用户设备的接收复杂度。因为用户设备需要检测多个非授权载波的整个带宽中的任意6RB，为了降低用户设备的检测复杂度，该6RB可以给出一定的限制，比如6RB的起始位置为6的倍数的RB编号数，譬如该6RB的编码可以为0~5、6~11、12~17等。
4、由于MIB只需要发送系统帧号，那么可以重新设计MIB的发送时间，比如可以将MIB的发送时间设置为小于或等于4个symbol占用的时长，比如MIB的发送时间为2个symbol占用的时长。
5、PCell Group或PSCell Group中的任一小区的LBT机制主要包括如下两个：
（1）LBT机制1：
若任一小区在子帧n的起始位置进行16μs+M×9μs的one shot信道检测过程检测到信道空闲，则在子帧n中的剩余时长内发送所述主要信息块；或
若任一小区在子帧n之前的子帧的末尾位置进行16μs+M×9μs的one shot信道检测时检测到信道空闲，则在子帧n中发送所述主要信息块；
其中，M=1或2。
具体地，譬如某一小区在subframe#0内的前端25μs进行信道检测，若检测信道空闲，则在subframe#0接下来的时间发送MIB。或者某一小区是在subframe#0前面的subframe#9的最后端的25μs进行信道检测，若检测信道空闲，则在subframe#0发送MIB。
需要注意的是：这个25μs的信道检测时间分为16μs和9μs，25μs信道空闲表示：16μs中的前9μs信道持续空闲；并且9μs中的任意4μs信道持续空闲。
（2）LBT机制2：
在检测到信道持续空闲的时长达到16μs+M×9μs之后，从0至竞争窗口之间选取随机数，其中，M为正整数；
在选取所述随机数后继续以9μs为单位进行信道检测，若检测到信道忙，则所述随机数的值不变，并在检测到下行信道持续空闲的时长达到16μs+M×9μs时，所述随机数的值减1；若检测到信道空闲，则所述随机数的值减1；
在所述随机数的值减为0时，确定能够占用所述信道。
图5示出了根据本发明的第三个实施例的通信装置的示意框图。
如图5所示，根据本发明的第三个实施例的通信装置，包括：处理器1和存储器2。在本发明的一些实施例中，处理器1和存储器2可以通过总线3或其他方式连接，图5中以通过总线3连接为例。
其中，存储器2用于存储一组程序代码，处理器1调用存储器2中存储的程序代码，用于执行以下操作：
向每个终端配置至少一个服务小区，每个所述服务小区工作在一个非授权载波上；
从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区或主辅助小区，以组成所述每个终端的主小区群组或主辅助小区群组；
通过所述主小区群组或主辅助小区群组向所述每个终端发送主要信息块。
作为一种可选的实施方式，处理器1调用存储器2中存储的程序代码，还用于执行以下操作：
通过工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置所述至少一个服务小区，
其中，所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
作为一种可选的实施方式，处理器1调用存储器2中存储的程序代码，还用于执行以下操作：
通过工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置工作在非授权频段上的主辅助服务小区，所述主辅助服务小区向所述每个终端在所述辅基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主辅助服务小区组成所述至少一个服务小区，
其中，所述主辅助服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
作为一种可选的实施方式，处理器1调用存储器2中存储的程序代码，还用于执行以下操作：
通过工作在非授权频段上的主基站的主服务小区向所述每个终端在所述主基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主服务小区组成所述至少一个服务小区，
其中，所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区，以组成所述每个终端的主小区群组。
作为一种可选的实施方式，处理器1调用存储器2中存储的程序代码，具体用于执行以下操作：
通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送所述主要信息块。
作为一种可选的实施方式，处理器1调用存储器2中存储的程序代码，还用于执行以下操作：
若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则在同一时间通过所述多个小区中的一个小区或多个小区发送所述主要信息块。
作为一种可选的实施方式，处理器1调用存储器2中存储的程序代码，还用于执行以下操作：
若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则控制所述多个小区在不同的时间点分别发送所述主要信息块。
图6示出了根据本发明的第四个实施例的通信装置的示意框图。
如图6所示，根据本发明的第四个实施例的通信装置，包括：处理器1'、存储器2'和输入装置4'。在本发明的一些实施例中，处理器1'、存储器2'和输入装置4'可以通过总线3'或其他方式连接，图6中以通过总线3'连接为例。
其中，存储器2'用于存储一组程序代码，处理器1'调用存储器2'中存储的程序代码，用于执行以下操作：
确定工作在非授权载波上的主小区群组或主辅助小区群组，其中，所述主小区群组或主辅助小区群组是从工作在非授权载波上的至少一个服务小区中进行选择而组成的，每个所述服务小区工作在一个非授权载波上。
通过输入装置4'接收所述主小区群组或主辅助小区群组中的小区发送的主要信息块。
本发明实施例的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。
本发明实施例的通信装置中的单元可以根据实际需要进行合并、划分和删减。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读存储介质中，存储介质包括只读存储器（Read-Only Memory，ROM）、随机存储器（Random Access Memory，RAM）、可编程只读存储器（Programmable Read-only Memory，PROM）、可擦除可编程只读存储器（Erasable Programmable Read Only Memory，EPROM）、一次可编程只读存储器（One-time Programmable Read-Only Memory，OTPROM）、电子抹除式可复写只读存储器（Electrically-Erasable Programmable Read-Only Memory，EEPROM）、只读光盘（Compact Disc Read-Only Memory，CD-ROM）或其他光盘存储器、磁盘存储器、磁带存储器、或者能够用于携带或存储数据的计算机可读的任何其他介质。
以上结合附图详细说明了本发明的技术方案，本发明提出了一种新的通信方案，可以提高非授权频段上的主小区群组或主辅助小区群组上的主要信息块的发送概率，进而可以保证用户及时接收到MIB，以根据MIB中的系统帧号进行时间同步，从而保证通信的正常进行，满足了通信的时延和效率要求。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (24)

  1. 一种通信装置，其特征在于，包括：
    配置单元，设置为向每个终端配置至少一个服务小区，每个所述服务小区工作在一个非授权载波上；
    选择单元，设置为从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区或主辅助小区，以组成所述每个终端的主小区群组或主辅助小区群组；
    通信控制单元，设置为通过所述主小区群组或主辅助小区群组向所述每个终端发送主要信息块。
  2. 根据权利要求1所述的通信装置，其特征在于：
    所述配置单元具体设置为，通过工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置所述至少一个服务小区；
    所述选择单元具体设置为，通过所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
  3. 根据权利要求1所述的通信装置，其特征在于：
    所述配置单元具体设置为，通过工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置工作在非授权频段上的主辅助服务小区，所述主辅助服务小区向所述每个终端在所述辅基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主辅助服务小区组成所述至少一个服务小区；
    所述选择单元具体设置为，通过所述主辅助服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组。
  4. 根据权利要求3所述的通信装置，其特征在于，在所述主辅助服务小区为多个的情况下，向所述每个终端配置所述0个或至少一个小区的配置信令由所述主辅助服务小区中的一个或多个发送。
  5. 根据权利要求1所述的通信装置，其特征在于：
    所述配置单元具体设置为，通过工作在非授权频段上的主基站的主服务小区向所述每个终端在所述主基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主服务小区组成所述至少一个服务小区；
    所述选择单元具体设置为，通过所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区，以组成所述每个终端的主小区群组。
  6. 根据权利要求1所述的通信装置，其特征在于，所述通信控制单元具体设置为：
    通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送所述主要信息块。
  7. 根据权利要求6所述的通信装置，其特征在于，所述通信控制单元具体还设置为：
    若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则在同一时间通过所述多个小区中的至少一个小区发送所述主要信息块。
  8. 根据权利要求6所述的通信装置，其特征在于，所述通信控制单元具体还设置为：
    若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则控制所述多个小区在不同的时间点分别发送所述主要信息块。
  9. 根据权利要求6所述的通信装置，其特征在于，发送所述主要信息块的小区以5ms或10ms为周期进行发送。
  10. 根据权利要求6所述的通信装置，其特征在于，若所述主小区群组或主辅助小区群组中的任一个小区检测到在有限的频域上连续的6个资源块对应的下行信道空闲，则确定检测到下行信道空闲，其中，所述有限的频域的带宽小于或等于所述任一个小区的带宽，且大于或等于6个资源块。
  11. 根据权利要求10所述的通信装置，其特征在于，所述连续的6个资源块的编号为预定义的资源块编号。
  12. 根据权利要求1至11中任一项所述的通信装置，其特征在于，所述主要信息块的发送时长大于或等于1个符号所占用的时长，且小于或等于4个符号所占用的时长。
  13. 根据权利要求6至11中任一项所述的通信装置，其特征在于，所述通信控制单元通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的任一小区发送所述主要信息块的操作，具体包括：
    若所述任一小区在子帧n的起始位置进行16μs+M×9μs的one shot信道检测过程检测到信道空闲，则通过所述任一小区在所述子帧n中的剩余时长内发送所述主要信息块；或
    若所述任一小区在子帧n之前的子帧的末尾位置进行16μs+M×9μs的one shot信道检测时检测到信道空闲，则通过所述任一小区在所述子帧n中发送所述主要信息块；
    其中，M=1或2。
  14. 根据权利要求6至11中任一项所述的通信装置，其特征在于，所述主小区群组或主辅助小区群组中的任一小区进行下行信道检测的过程，具体包括：
    在检测到信道持续空闲的时长达到16μs+M×9μs之后，从0至竞争窗口之间选取随机数，其中，M为正整数；
    在选取所述随机数后继续以9μs为单位进行信道检测，若检测到信道忙，则所述随机数的值不变，并在检测到下行信道持续空闲的时长达到16μs+M×9μs时，所述随机数的值减1；若检测到信道空闲，则所述随机数的值减1；
    在所述随机数的值减为0时，确定能够占用所述信道。
  15. 一种通信方法，其特征在于，包括：
    向每个终端配置至少一个服务小区，每个所述服务小区工作在一个非授权载波上；
    从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区或主辅助小区，以组成所述每个终端的主小区群组或主辅助小区群组；
    通过所述主小区群组或主辅助小区群组向所述每个终端发送主要信息块。
  16. 根据权利要求15所述的通信方法，其特征在于：
    工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置所述至少一个服务小区，其中，所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组；或
    工作在授权频段上的主基站的主服务小区向所述每个终端在辅基站上配置工作在非授权频段上的主辅助服务小区，所述主辅助服务小区向所述每个终端在所述辅基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主辅助服务小区组成所述至少一个服务小区，其中，所述主辅助服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端在所述辅基站上的主辅助小区，以组成所述每个终端在所述辅基站上的主辅助小区群组，
    在所述主辅助服务小区为多个的情况下，向所述每个终端配置所述0个或至少一个小区的配置信令由所述主辅助服务小区中的一个或多个发送；或
    工作在非授权频段上的主基站的主服务小区向所述每个终端在所述主基站上配置工作在非授权频段上的0个或至少一个小区，所述0个或至少一个小区和所述主服务小区组成所述至少一个服务小区，其中，所述主服务小区从所述至少一个服务小区中选出至少一个作为所述每个终端的主小区，以组成所述每个终端的主小区群组。
  17. 根据权利要求15所述的通信方法，其特征在于，通过所述主小区群组或主辅助小区群组向所述每个终端发送主要信息块的步骤，具体包括：
    通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的小区发送所述主要信息块。
  18. 根据权利要求17所述的通信方法，其特征在于，还包括：
    若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则在同一时间通过所述多个小区中的至少一个小区发送所述主要信息块；和/或
    若所述主小区群组或主辅助小区群组中的多个小区检测到下行信道空闲，则控制所述多个小区在不同的时间点分别发送所述主要信息块。
  19. 根据权利要求17所述的通信方法，其特征在于，若所述主小区群组或主辅助小区群组中的任一个小区检测到在有限的频域上连续的6个资源块对应的下行信道空闲，则确定检测到下行信道空闲，其中，所述有限的频域的带宽小于或等于所述任一个小区的带宽，且大于或等于6个资源块；
    其中，所述连续的6个资源块的编号为预定义的资源块编号。
  20. 根据权利要求15至19中任一项所述的通信方法，其特征在于，所述主要信息块的发送时长大于或等于1个符号所占用的时长，且小于或等于4个符号所占用的时长。
  21. 根据权利要求17至19中任一项所述的通信方法，其特征在于，通过所述主小区群组或主辅助小区群组中检测到下行信道空闲的任一小区发送所述主要信息块的步骤，具体包括：
    若所述任一小区在子帧n的起始位置进行16μs+M×9μs的one shot信道检测过程检测到信道空闲，则在所述子帧n中的剩余时长内发送所述主要信息块；或
    若所述任一小区在子帧n之前的子帧的末尾位置进行16μs+M×9μs的one shot信道检测时检测到信道空闲，则在所述子帧n中发送所述主要信息块；
    其中，M=1或2。
  22. 根据权利要求17至19中任一项所述的通信方法，其特征在于，所述主小区群组或主辅助小区群组中的任一小区进行下行信道检测的过程，具体包括：
    在检测到信道持续空闲的时长达到16μs+M×9μs之后，从0至竞争窗口之间选取随机数，其中，M为正整数；
    在选取所述随机数后继续以9μs为单位进行信道检测，若检测到信道忙，则所述随机数的值不变，并在检测到下行信道持续空闲的时长达到16μs+M×9μs时，所述随机数的值减1；若检测到信道空闲，则所述随机数的值减1；
    在所述随机数的值减为0时，确定能够占用所述信道。
  23. 一种通信装置，其特征在于，包括：
    确定单元，设置为确定工作在非授权载波上的主小区群组或主辅助小区群组，其中，所述主小区群组或主辅助小区群组是从工作在非授权载波上的至少一个服务小区中进行选择而组成的，每个所述服务小区工作在一个非授权载波上；
    接收单元，设置为接收所述主小区群组或主辅助小区群组中的小区发送的主要信息块。
  24. 一种通信方法，其特征在于，包括：
    终端确定工作在非授权载波上的主小区群组或主辅助小区群组；
    接收所述主小区群组或主辅助小区群组中的小区发送的主要信息块；
    其中，所述主小区群组或主辅助小区群组是从工作在非授权载波上的至少一个服务小区中进行选择而组成的，每个所述服务小区工作在一个非授权载波上。
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