WO2016169046A1 - Terminal, station de base et procédé de transmission de données - Google Patents

Terminal, station de base et procédé de transmission de données Download PDF

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Publication number
WO2016169046A1
WO2016169046A1 PCT/CN2015/077378 CN2015077378W WO2016169046A1 WO 2016169046 A1 WO2016169046 A1 WO 2016169046A1 CN 2015077378 W CN2015077378 W CN 2015077378W WO 2016169046 A1 WO2016169046 A1 WO 2016169046A1
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WIPO (PCT)
Prior art keywords
vrb
dedicated
terminal
radio frequency
frequency bandwidth
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PCT/CN2015/077378
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English (en)
Chinese (zh)
Inventor
张应余
龚政委
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/077378 priority Critical patent/WO2016169046A1/fr
Priority to CN201580066628.4A priority patent/CN107005996B/zh
Publication of WO2016169046A1 publication Critical patent/WO2016169046A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a terminal, a base station, and a data transmission method.
  • LTE Long Term Evolution
  • GSM Global System of Mobile communication
  • WCDMA Wideband Code Division Multiple Access
  • M2M Machine to Machine
  • LTE M2M System LTE M2M System
  • a terminal applied to an LTE M2M system referred to as an "M2M terminal” is a main feature compared to an existing terminal applied to a Human to Human (H2H) system. Reducing the terminal RF bandwidth is an important means to reduce the terminal cost.
  • the transmission resources of the PDCCH channel are distributed over the entire system bandwidth, and the terminal performs blind detection on the PDCCH channel over the entire system bandwidth.
  • the entire system bandwidth is greater than the RF bandwidth of the M2M terminal, the M2M terminal cannot completely receive the PDCCH channel.
  • the PDCCH channel carries some scheduling signaling, and the scheduling signaling is used by the scheduling terminal to receive broadcast information sent on the Physical Downlink Shared CHannel (PDSCH), for example, System Information, Paging messages, and Random Access Response (RAR) messages. Therefore, the M2M terminal cannot receive the PDCCH completely, which may result in it being unable to receive the existing broadcast class information.
  • PDSCH Physical Downlink Shared CHannel
  • RAR Random Access Response
  • the embodiment of the invention provides a terminal, a base station, and a data transmission method, which are used in a scenario in which the radio frequency bandwidth of the terminal with limited radio frequency bandwidth is smaller than the radio frequency bandwidth, and the problem that the terminal cannot receive the downlink data normally is solved.
  • an embodiment of the present invention provides a base station, including:
  • a processing module configured to determine a number of a dedicated VRB used for downlink data transmission to a set number of radio frequency bandwidth limited terminals in the current cell; and the determined number of the dedicated VRB is sequentially written to the interleaver sequentially And reading the number of the dedicated VRB from the interleaver column by column, and mapping to the number of the PRB;
  • a sending module configured to perform downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell on a PRB corresponding to the number of the mapped PRBs;
  • the number of the dedicated VRB is satisfied: after the interleaver is placed in the order of row by row, the M row and the N column of the interleaver are occupied, wherein the base station is in the current cell in a transmission time interval TTI
  • the VRB used by a radio frequency bandwidth limited terminal for downlink transmission is located in one of the N columns; and the M row_UE resource block RB occupies an RF bandwidth not greater than the set number in the current cell.
  • the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth in the radio bandwidth limited terminal, and M row_UE is the difference between the maximum value and the minimum value of the number of the line occupied by the dedicated VRB after being placed in the interleaver, M row_UE , M, and N are positive integers.
  • the sending module is further configured to:
  • the numbered information of the dedicated VRB includes: a number used to indicate the dedicated VRB Information on the number of rows of the interleaver and information on the number of occupied columns.
  • the information of the number of the dedicated VRB includes :
  • the information of the number of the dedicated VRB includes: :
  • the information of the number of the dedicated VRB further includes:
  • the number of the dedicated VRB occupies the number of all VRBs except the null element in the interleaver
  • the information about the number of the dedicated VRB includes:
  • the processing module is further configured to:
  • the RB interval value is determined according to the system bandwidth of the current cell.
  • the sending module is further configured to:
  • the radio frequency bandwidth limited terminal is an M2M terminal.
  • the sending module is specifically configured to:
  • Downlink data transmission is performed to the set number of radio frequency bandwidth limited terminals in the current cell by using a physical downlink control channel PDCCH or a physical downlink shared channel PDSCH.
  • an embodiment of the present invention provides a base station, including:
  • a processing module configured to determine K packets to which a dedicated VRB used for performing downlink data transmission to a set number of radio frequency bandwidth limited terminals in the current cell belongs to the current cell within one transmission time interval TTI
  • a VRB used by a radio frequency bandwidth limited terminal for downlink data transmission belongs to one of the K packets, and K is a positive integer
  • a sending module configured to: for each of the K packets, the radio frequency bandwidth limited in the current cell on a PRB corresponding to a number of a PRB with the same VRB number in the packet Setting a number of terminals for downlink data transmission;
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell; the M group_UE is respectively determined by the K The difference between the maximum value and the minimum value of the VRB number in each of the packets, and the maximum value determined among the respective differences.
  • the sending module is further configured to:
  • the radio bandwidth limited terminal is an M2M terminal.
  • the sending module is specifically configured to:
  • Downlink data transmission is performed to the set number of radio frequency bandwidth limited terminals in the current cell by using a physical downlink control channel PDCCH or a physical downlink shared channel PDSCH.
  • an embodiment of the present invention provides a terminal with limited radio frequency bandwidth, including:
  • a processing module configured to determine a number of the dedicated VRB, where the dedicated VRB is a VRB used by the base station to perform downlink data transmission to a terminal with a limited number of radio frequency bandwidths in a current cell where the terminal is located; and determining the dedicated The number of the PRB obtained after the number of the VRB is mapped by the interleaver;
  • a receiving module configured to receive downlink data transmission performed by the base station in the current cell on a PRB corresponding to the number of the mapped PRB obtained by the processing module;
  • the number of the dedicated VRBs is such that after the interleaver is placed in order, the M rows and the N columns of the interleaver are occupied, wherein, within one transmission time interval TTI, the current cell A radio frequency bandwidth limited terminal receives a VRB used for downlink transmission and is located in one of the N columns; and the M row_UE resource block RB occupies an RF bandwidth not greater than the set number of radio frequency bandwidths in the current cell.
  • the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth in the restricted terminal where the M row_UE is used by the terminal with the limited number of radio frequency bandwidths in the current cell to receive the downlink data transmission sent by the base station
  • the number of the VRB is the difference between the maximum value and the minimum value of the row number occupied by the interleaver, and M row_UE , M, and N are positive integers.
  • the processing module is configured to: receive, by the receiving module, information about a number of the dedicated VRB sent by the base station; and determine a number of the dedicated VRB according to the received information of the number of the dedicated VRB.
  • the information of the number of the dedicated VRB includes information indicating that the number of the dedicated VRB occupies the number of the row of the interleaver and the number of the occupied column.
  • the information of the number of the dedicated VRB includes: :
  • the information of the number of the dedicated VRB includes: :
  • the information of the number of the dedicated VRB further includes:
  • the number of the dedicated VRB occupies the number of all VRBs except the null element in the interleaver
  • the information about the number of the dedicated VRB includes:
  • the receiving module is further configured to: before receiving the downlink transmission performed by the base station, on the PRB corresponding to the number of the mapped PRB obtained by the processing module, receive information about an RB interval value sent by the base station;
  • the processing module is further configured to: determine, according to the RB interval value received by the receiving module, a number of a PRB obtained by mapping the number of the dedicated VRB through the interleaver.
  • the radio frequency bandwidth limited terminal is Machine To the machine M2M terminal.
  • the receiving module is specifically configured to:
  • an embodiment of the present invention provides a terminal with limited radio frequency bandwidth, including:
  • a processing module configured to determine, in a current cell where the terminal is located, a K packet to which a dedicated VRB used for downlink data transmission is used by a terminal with a limited number of radio frequency bandwidth restrictions; wherein, within one transmission time interval TTI, The VRB used by the base station to perform downlink data transmission to a radio frequency bandwidth limited terminal in the current cell belongs to one of the K packets, and K is a positive integer;
  • a receiving module configured to receive downlink data transmission performed by the base station on a PRB corresponding to a number of a PRB with the same number of a VRB in each of the K packets;
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell;
  • M group_UE is a maximum value determined by determining a difference between a maximum value and a minimum value of a VRB number in each of the K packets, and determining each of the difference values. .
  • the processing module is specifically configured to:
  • the radio frequency bandwidth limited terminal is a machine to machine M2M terminal.
  • the receiving module is specifically used to:
  • an embodiment of the present invention provides a data transmission method, including:
  • the base station writes the determined number of the dedicated VRBs to the interleaver in order, and reads the number of the dedicated VRB from the interleaver column by column, and then maps to the number of the PRB;
  • the base station performs downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell on the PRB corresponding to the number of the mapped PRB;
  • the number of the dedicated VRB is satisfied: after the interleaver is placed in the order of row by row, the M row and the N column of the interleaver are occupied, wherein the base station is in the current cell in a transmission time interval TTI
  • the VRB used by a radio frequency bandwidth limited terminal for downlink transmission is located in one of the N columns; and the M row_UE resource block RB occupies an RF bandwidth not greater than the set number in the current cell.
  • the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth in the radio bandwidth limited terminal, and M row_UE is the difference between the maximum value and the minimum value of the number of the line occupied by the dedicated VRB after being placed in the interleaver, M row_UE , M, and N are positive integers.
  • the method before the performing, by the base station, downlink transmission to a terminal with limited radio frequency bandwidth in the current cell, the method further includes:
  • the base station sends information of the number of the dedicated VRB to the set number of radio frequency bandwidth limited terminals in the current cell.
  • the information of the number of the dedicated VRB includes information indicating that the number of the dedicated VRB occupies the number of the row of the interleaver and the number of the occupied column.
  • the information of the number of the dedicated VRB includes: :
  • the information of the number of the dedicated VRB includes: :
  • the information about the number of the dedicated VRB further includes:
  • the number of the dedicated VRB occupies the number of all VRBs except the null element in the interleaver
  • the information about the number of the dedicated VRB includes:
  • the number of the dedicated VRB to be determined by the base station Before writing the interleaver row by row it also includes:
  • the base station determines an RB interval value according to a system bandwidth of the current cell.
  • the base station performs downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell Previously, it also included:
  • the base station sends the information of the RB interval value to the set number of radio frequency bandwidth limited terminals in the current cell.
  • the radio frequency bandwidth limited terminal is a machine to machine M2M terminal.
  • the base station performs downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell, including:
  • the base station performs downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell by using a physical downlink control channel PDCCH or a physical downlink shared channel (PDSCH).
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • an embodiment of the present invention provides a data transmission method, including:
  • the base station For each of the K packets, the base station is subjected to the set number of radio frequency bandwidths in the current cell on a PRB corresponding to the number of the PRBs having the same number of VRBs in the packet.
  • the limited terminal performs downlink data transmission;
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell;
  • M group_UE is a maximum value determined by determining a difference between a maximum value and a minimum value of a VRB number in each of the K groups, and determining each of the difference values.
  • the method before the performing, by the base station, the downlink data transmission by the set number of radio frequency bandwidth limited terminals in the current cell, the method further includes:
  • the base station sends group identification information of the K packets to the set number of radio frequency bandwidth limited terminals in the current cell.
  • the radio bandwidth limited terminal is a machine to machine M2M terminal.
  • the set number of radio frequency bandwidth limited terminals in the cell perform downlink data transmission, including:
  • the base station passes the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH
  • the set number of radio frequency bandwidth limited terminals in the current cell perform downlink data transmission.
  • an embodiment of the present invention provides a data transmission method, including:
  • the radio frequency bandwidth limited terminal in the current cell determines the number of the dedicated VRB, and the dedicated VRB is the VRB used by the base station to perform downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell;
  • the number of the dedicated VRBs is such that after the interleaver is placed in order, the M rows and the N columns of the interleaver are occupied, wherein, within one transmission time interval TTI, the current cell A radio frequency bandwidth limited terminal receives a VRB used for downlink transmission and is located in one of the N columns; and the M row_UE resource block RB occupies an RF bandwidth not greater than the set number of radio frequency bandwidths in the current cell.
  • the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth in the limited terminal where the M row_UE is the VRB used by the terminal with limited radio frequency bandwidth of the set skilled tube in the current cell to receive the downlink data transmission sent by the base station
  • the number of the row is the difference between the maximum value and the minimum value of the row occupied by the interleaver, and M row_UE , M, N are positive integers.
  • the terminal determines a number of the dedicated VRB, including:
  • the terminal determines the number of the dedicated VRB according to the received information of the number of the dedicated VRB.
  • the information of the number of the dedicated VRB includes information indicating that the number of the dedicated VRB occupies the number of the row of the interleaver and the number of the occupied column.
  • the number of the dedicated VRB occupies the first M rows of the interleaver
  • the number of the dedicated VRB is Information
  • the information of the number of the dedicated VRB includes: :
  • the information of the number of the dedicated VRB further includes:
  • the information about the number of the dedicated VRB includes:
  • the method further includes:
  • the terminal determines, according to the received RB interval value, a number of a PRB obtained by mapping the number of the dedicated VRB through the interleaver.
  • the radio frequency bandwidth limited terminal is Machine to machine M2M terminal.
  • Downstream data transmission including:
  • the terminal receives downlink data transmission performed by the base station by using a physical downlink control channel PDCCH or a physical downlink shared channel (PDSCH).
  • a physical downlink control channel PDCCH or a physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • an embodiment of the present invention provides a data transmission method, including:
  • the terminal with limited radio frequency bandwidth in the current cell determines K packets to which the dedicated VRB used by the base station to perform downlink data transmission to the terminal of the set number of radio frequency bandwidth restrictions in the current cell; wherein, in one transmission time interval TTI The VRB used by the base station to perform downlink data transmission to a radio bandwidth limited terminal in the current cell belongs to one of the K packets, where K is a positive integer;
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell;
  • M group_UE is a maximum value determined by determining a difference between a maximum value and a minimum value of a VRB number in each of the K packets, and determining each of the difference values.
  • the terminal determines the K packets, including:
  • the terminal determines the K packets according to the received group identification information.
  • the radio bandwidth limited terminal is a machine to machine M2M terminal.
  • the terminal receives the Downlink data transmission by the base station, including:
  • the terminal receives downlink data transmission performed by the base station by using a physical downlink control channel PDCCH or a physical downlink shared channel (PDSCH).
  • a physical downlink control channel PDCCH or a physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • the embodiments of the present invention provide the following two options:
  • the first option is that, in a TTI, the VRB occupied by the base station for downlink transmission to a terminal with limited radio frequency bandwidth occupies 1 column; and the dedicated VRB occupies the difference between the maximum value and the minimum value of the row number of the interleaver.
  • the radio frequency bandwidth occupied by the M row_UE resource block RB is not greater than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell, and the interleaver is mapped by using the travel list, after being mapped by the interleaver, in the interleaver A column is mapped to the numbered consecutive PRBs, so that the VRBs occupied by one terminal are mapped to be no larger than the M row_UE PRBs. Regardless of whether the M row_UE PRBs are consecutively numbered, the bandwidth occupied by the M row_UE PRBs does not exceed the terminal.
  • the RF bandwidth ensures that the terminal with limited RF bandwidth normally receives downlink data.
  • the dedicated VRB used by the base station to perform downlink data transmission to the radio bandwidth limited terminal in the current cell belongs to K packets, and each packet is used for downlink data transmission of one terminal, and the above M in K packets
  • the radio frequency bandwidth occupied by the group_UE resource block RB is not greater than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell, and the base station uses the same VRB number in the packet corresponding to the terminal when performing downlink data transmission to the terminal.
  • the PRB corresponds to the PRB, so that the bandwidth occupied by the downlink data transmission to the terminal in one TTI is not greater than the radio frequency bandwidth of the terminal, and the normal reception of the downlink data of the terminal with limited radio bandwidth is ensured.
  • VRB virtual resource block
  • FIG. 3 is a schematic structural diagram of a wireless communication system according to an embodiment of the present disclosure.
  • FIG. 4 and FIG. 5 are schematic diagrams of a scheme for allocating a VRB in the first example
  • FIG. 6 is a schematic diagram of a scheme for allocating a VRB in the second example
  • FIG. 7 is a schematic structural diagram of a first base station according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a second base station according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a third base station according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a fourth base station according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a first terminal according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a second terminal according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a third terminal according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a fourth terminal according to an embodiment of the present disclosure.
  • FIG. 15 is a flowchart of a first data transmission method according to an embodiment of the present invention.
  • FIG. 16 is a flowchart of a second data transmission method according to an embodiment of the present invention.
  • FIG. 17 is a flowchart of a third data transmission method according to an embodiment of the present invention.
  • FIG. 18 is a flowchart of a fourth data transmission method according to an embodiment of the present invention.
  • the embodiment of the invention provides a terminal, a base station, and a data transmission method, which are used in a scenario in which the radio frequency bandwidth of the terminal with limited radio frequency bandwidth is smaller than the radio frequency bandwidth, and the problem that the terminal cannot receive the downlink data normally is solved.
  • the embodiment of the present invention provides the following two options:
  • the base station When the base station performs downlink data transmission to the terminal with limited radio frequency bandwidth in the current cell, the base station determines the number of the dedicated VRB used for downlink data transmission to the terminals; and the base station maps the determined number of the dedicated VRB to the PRB through the interleaver. On the number, and on the PRB corresponding to the number of the PRB mapped, downlink data transmission is performed to these terminals.
  • the terminal with limited radio frequency bandwidth in the current cell obtains the number of the dedicated VRB in the current cell in advance, and receives the downlink data transmission performed by the base station on the PRB corresponding to the number of the PRB obtained after the number mapping of the dedicated VRBs.
  • the number of the dedicated VRB is satisfied: after being placed in the interleaver row by row, occupying M rows and N columns of the interleaver, wherein the base station is in the current cell within a Transmission Time Interval (TTI)
  • TTI Transmission Time Interval
  • the VRB used by a radio frequency bandwidth limited terminal for downlink transmission is located in one column of the N columns; and the radio bandwidth occupied by the M row_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell, M
  • the row_UE is the difference between the maximum value and the minimum value of the number of the row occupied by the dedicated VRB after being placed in the interleaver, and Mrow_UE , M, and N are positive integers.
  • the VRB occupied by the base station for downlink transmission to a radio bandwidth limited terminal occupies 1 column in one TTI; and the dedicated VRB occupies the difference between the maximum value and the minimum value of the interleaver row number.
  • the radio frequency bandwidth occupied by the value of the M row_UE resource block RB is not greater than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell, and the interleaver is mapped by using the travel list, after being mapped by the interleaver, the interleaver One row is mapped to the numbered consecutive PRBs, so that the VRBs occupied by one terminal are mapped to not more than M row_UE PRBs, regardless of whether the M row_UE PRBs are consecutively numbered, the bandwidth occupied by the M row_UE PRBs does not exceed
  • the radio frequency bandwidth of the terminal ensures that the terminal with limited radio bandwidth receives the downlink data normally.
  • the base station For each of the K packets, the base station performs downlink data transmission to the terminal with limited radio frequency bandwidth in the current cell on the PRB corresponding to the number of the PRB with the same number of the VRB in the packet;
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell;
  • M group_UE is a maximum value determined by determining a difference between a maximum value and a minimum value of a VRB number in each of the K groups, and determining each of the difference values.
  • the dedicated VRB used by the base station to perform downlink data transmission to the terminal with limited radio frequency bandwidth in the current cell belongs to K packets, and each packet is used for downlink data transmission of one terminal, and the above M in K packets
  • the radio frequency bandwidth occupied by the group_UE resource block RB is not greater than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell, and the base station uses the same VRB number in the packet corresponding to the terminal when performing downlink data transmission to the terminal.
  • the PRB corresponds to the PRB, so that the bandwidth occupied by the downlink data transmission to the terminal in one TTI is not greater than the radio frequency bandwidth of the terminal, and the normal reception of the downlink data of the terminal with limited radio bandwidth is ensured.
  • the resource allocation mode based on the LVRB is less compatible with the DVRB-based resource allocation mode of the existing LTE system.
  • the virtual resource blocks of distributed type are not directly mapped to physical resource blocks.
  • the parameters related to its mapping include resource block (RB) gaps, which are defined as listed in Table 6.2.3.2-1 of 3GPP TS 36.211.
  • a plurality of VRBs are continuously allocated, and interleaved in the manner listed in the travel, as shown in step 1 in FIG. 1 and FIG. 2, and the first time slot is performed in step 1.
  • the mapping of a virtual resource block (VRB) to a physical resource block (PRB) is shown in step 3 in FIG. 1 and FIG. 2.
  • N row is the number of rows of the interleaver
  • N col is the number of columns of the interleaver
  • P is the size of the Resource Block Group (RBG), which is continuous.
  • the VRBs form a VRB interleaving unit. Indicates rounding up, Indicates rounding down.
  • Time Division Duplexing-Long Term Evolution (TDD LTE), Frequency Division Duplexing-Long Term Evolution (FDD LTE), and Long Term Evolution.
  • - Enhanced (Long LTE systems such as Term Evolution-Advanced, LTE-advanced) can also be applied to other systems that require transmission resource mapping and allocation during data transmission.
  • the base station is a network device that is also wirelessly connected to the terminal.
  • the base station may also have a function of radio resource management.
  • the terminal is a terminal device that communicates with the base station, including user equipment, a relay node, and the like.
  • the radio frequency bandwidth of the terminal with limited radio frequency bandwidth is smaller than the system bandwidth of the system, for example, an M2M terminal.
  • the base station provided by the embodiment of the present invention may be an evolved Node B (eNodeB), and the terminal is a User Equipment (UE).
  • eNodeB evolved Node B
  • UE User Equipment
  • the wireless communication system provided by the embodiment of the present invention is introduced, and then the terminal and the base station provided by the embodiment of the present invention are introduced. Finally, the data transmission method provided by the embodiment of the present invention is introduced.
  • FIG. 3 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention.
  • the wireless communication system includes: a base station 301 and a terminal 302.
  • the base station 301 and the terminal 302 perform downlink data transmission, where the terminal 302 is a terminal with limited radio frequency bandwidth.
  • the base station 301 and the terminal 302 are respectively used to:
  • the base station 301 is configured to determine a number of a dedicated VRB used for downlink data transmission to a terminal with a limited number of radio frequency bandwidth restrictions in the current cell, and write the determined number of the dedicated VRB to the interleaver in order, and then After being read out column by column in the interleaver, for example, mapping to the number of the PRB in the manner of DVRB, and on the PRB corresponding to the number of the mapped PRB, the set number of radio frequency bandwidths in the current cell is limited.
  • the terminal 302 is configured to determine a number of the dedicated VRB, and determine that the number of the dedicated VRB is interleaved The number of the PRB obtained after the mapping of the device, and the downlink data transmission performed by the base station 301 in the current cell on the PRB corresponding to the obtained number of the mapped PRB.
  • the number of the dedicated VRB is satisfied: after the interleaver is sequentially placed in the order, the M row and the N column of the interleaver are occupied, wherein, in one TTI, the base station 301 performs a radio frequency bandwidth limited terminal in the current cell.
  • the VRB used for the downlink transmission is located in the first column of the N columns; and the radio bandwidth occupied by the M row_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell.
  • M row_UE is the difference between the maximum value and the minimum value of the number of the line occupied by the number of the dedicated VRB after being placed in the interleaver, and M row_UE , M, and N are positive integers.
  • the radio bandwidth of all the radio bandwidth-limited terminals in the current cell may be the same, for example, occupying 6 RBs.
  • the radio frequency bandwidth of all the radio bandwidth-limited terminals in the current cell is not completely the same.
  • the value of the M row_UE may be set according to the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth.
  • the terminal with a limited number of radio frequency bandwidths may be a terminal with limited radio frequency bandwidth in communication with the base station in the current cell, for example, a terminal having a radio resource control RRC connection.
  • the set number of terminals with limited radio frequency bandwidth may also be some terminals in the radio bandwidth limited terminal in the current cell that are communicating with the base station.
  • a terminal with a limited number of radio frequency bandwidths is a terminal with limited radio frequency bandwidth in communication with the base station in the current cell; the bandwidths of all terminals with limited radio bandwidth are the same as an example.
  • the first method is to allocate resources according to the DVRB manner, and the interleaver of the existing wireless communication system may be reused; optionally, the interleaving parameter of the foregoing existing wireless communication system, the RB gap value N, may also be used.
  • Gap : N gap, 1 and N gap, 2 optionally, the definition can be found in 3GPP TS 36.211 Table 6.2.3.2-1.
  • the base station 301 stores the VRB number that can be allocated based on the DVRB mode in the existing wireless communication system in the interleaver, and dedicate some of the rows and columns in the interleaver to the terminal with limited radio frequency bandwidth, that is, the foregoing “ Dedicated VRB”.
  • the M rows and N columns of the interleaver optionally, NULL is not included as a dedicated VRB, and the PRB resources corresponding to the dedicated VRBs are used for downlink data transmission of the radio bandwidth limited terminal.
  • the M row may be continuous or non-contiguous, and the difference between the maximum row number and the minimum row number of the M-line dedicated VRB, that is, the aforementioned M row_UE satisfies:
  • the radio bandwidth occupied by the M row_UE RBs is not greater than the radio frequency bandwidth of the terminal with limited radio bandwidth in the current cell.
  • the value of N is not greater than the number of columns of the existing interleaver, and the column numbers of the corresponding N columns may be consecutive or discontinuous, and the M VRBs of each column are allocated as one VRB resource group to one radio frequency bandwidth. Limited terminal.
  • the location of the number of the dedicated VRB in the interleaver may be pre-agreed by a protocol, and the base station 301 completes resource allocation of the radio bandwidth limited terminal by using a pre-agreed location, and the terminal 302 according to the pre-agreed location Receive downlink data.
  • the base station 301 can also send the information of the number of the dedicated VRB to the terminal with limited radio frequency bandwidth in the current cell; and the terminal 302 serves as the terminal with limited radio frequency bandwidth in the current cell, and the number of the dedicated VRB can be received.
  • the downlink data transmission is received on the PRB identified by the number of the PRB mapped. For an example of the information of the number of the dedicated VRB, see Example 3 below.
  • the terminal 302 determines, according to the pre-protocol of the protocol, or according to the information of the number of the dedicated VRB sent by the base station 301, which VRB numbers in the interleaver are used for downlink data transmission of the radio bandwidth limited terminal, and the determined VRBs are determined.
  • the downlink data is received on the PRB identified by the number of the PRB, and the blind detection may be performed on the PRB.
  • the blind detection method may refer to the blind detection of the PDCCH in the existing LTE system.
  • the downlink control information (Downlink Control Information) is transmitted on the channel, and the DCI includes: uplink grant information (physical uplink shared channel grant: PUSCH grants). Downlink scheduling information (PDSCH assignment: PDSCH assignments), power control information, and the like.
  • the terminal 302 generally does not know the size of the physical resource (Control Channel Element: Control Channel Element, CCE) occupied by the current PDCCH, and does not know the specific location where the information sent to itself is located. However, the terminal 302 knows what information it is currently expecting, for example, the information expected by the terminal 302 in the idle Idle state is a paging scheduling indication (paging SI); after the random access procedure is initiated, the information expected by the terminal 302 is a random access channel. Response (RACH Response); the terminal 302 expects uplink grant information and the like when there is uplink data waiting for transmission.
  • paging SI paging scheduling indication
  • RACH Response the terminal 302 expects uplink grant information and the like when there is uplink data waiting for transmission.
  • the UE uses the corresponding Radio Network Temporary Indentity (RNTI) (for example, for the random access channel response, the UE uses the random access-RNTI: RA-RNTI) to perform the cycle with the CCE information.
  • RNTI Radio Network Temporary Indentity
  • the terminal 302 determines that the information is sent to itself, and further determines the corresponding DCI format and modulation mode, thereby solving the DCI.
  • the RB interval value Ngap is determined according to the system bandwidth of the current cell, and the radio frequency bandwidth in the current cell is limited.
  • the terminal sends the information of the determined N gap to the terminal with limited radio frequency bandwidth in the current cell.
  • the base station 301 may be 1bit information (Physical Broadcast CHannel, PBCH) in N gap indicated by a value of a physical broadcast channel or N gap1 N gap2.
  • N gap determined by determining the number of the dedicated PRB VRB number interleaver after mapping obtained according to further receive downlink data.
  • the base station 301 and the terminal 302 perform downlink data transmission by using a PDCCH or a Physical Downlink Shared CHannel (PDSCH).
  • a PDCCH or a Physical Downlink Shared CHannel (PDSCH).
  • PDSCH Physical Downlink Shared CHannel
  • Option 1 in which the VRB can be mapped based on the DVRB method. It is allocated to terminals with limited RF bandwidth.
  • Option 2 the VRB can be mapped based on the LVRB and allocated to terminals with limited RF bandwidth.
  • the base station 301 and the terminal 302 are respectively configured to:
  • the base station 301 is configured to determine K packets to which a dedicated VRB used for downlink data transmission to a set number of radio frequency bandwidth limited terminals in the current cell belongs; for each of the K packets, the base station 301 is in the group The downlink data transmission is performed on the PRB corresponding to the radio frequency bandwidth in the current cell on the PRB corresponding to the number of the same PRB in the VRB;
  • the terminal 302 is configured to determine K packets to which the dedicated VRB used by the base station 301 to perform downlink data transmission to the radio bandwidth limited terminal in the current cell; and the same number as the VRB in each of the K packets.
  • the VRB used by the base station to perform downlink data transmission to a radio frequency bandwidth limited terminal in the current cell belongs to one of the K packets, and K is a positive integer in a transmission time interval TTI;
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell;
  • M group_UE is a difference between a maximum value and a minimum value of a VRB number in each of the K groups, and a maximum value determined in each difference value, for example: i is a positive integer, Num VRB_max (i) is the maximum value of the VRB number in the i-th packet, and Num VRB_min (i) is the minimum value of the VRB number in the i-th packet.
  • the radio bandwidth of all the radio bandwidth-limited terminals in the current cell may be the same, for example, occupying 6 RBs.
  • the radio frequency bandwidths of all the radio bandwidth-limited terminals in the current cell are not completely the same.
  • the value of the M row_UE may be set according to the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth.
  • the terminal with a limited number of radio frequency bandwidths may be a terminal with limited radio frequency bandwidth in communication with the base station in the current cell, for example, a terminal having a radio resource control RRC connection.
  • the set number of terminals with limited radio frequency bandwidth may also be some terminals in the radio bandwidth limited terminal in the current cell that are communicating with the base station.
  • a terminal with a limited number of radio frequency bandwidths is a terminal with limited radio frequency bandwidth in communication with the base station in the current cell; the bandwidths of all terminals with limited radio bandwidth are the same as an example.
  • the base station 301 may also send group identification information of K packets to the terminal with limited radio frequency bandwidth in the current cell; the terminal 302 receives the group identifier. After the information, the number of the VRB included in each of the K packets is determined according to the group identification information, and the downlink data transmission is received on the PRB corresponding to the determined PRB number with the same number of the VRB.
  • the mapping is performed based on the LVRB method, the VRB in one of the K packets is allocated to a terminal with limited radio frequency bandwidth, and the above formula is satisfied. Therefore, in a TTI, the bandwidth occupied by the PRB used by a terminal with limited radio frequency bandwidth is smaller than the radio bandwidth of the terminal with limited radio frequency bandwidth.
  • the system bandwidth of the current cell is 50 RBs
  • N gap N gap1
  • the interleaver defined by the existing 3GPP protocol is reused, and all VRB numbers available for DVRB allocation are stored in the interleaver.
  • the M rows and N columns (excluding NULL) VRBs in the interleaver are used as dedicated VRBs, and the radio bandwidth limited terminals receive the downlink data by using the PRBs corresponding to the VRBs.
  • the M row may be continuous or non-contiguous, and the maximum row number and the minimum row number in the M row are different from each other.
  • the bandwidth occupied by the VRB does not exceed the radio frequency bandwidth of the terminal with limited radio frequency bandwidth; N is not greater than that of the existing interleaver.
  • the number of columns, the column number of the N column may be continuous or non-contiguous, and the M VRBs of each column are allocated as a VRB resource group to a terminal with limited radio frequency bandwidth, such as an M2M terminal.
  • the first four rows of the interleaver all four columns of VRBs are used as dedicated VRBs, and the numbers of these VRBs are: 0 to 15, divided into: ⁇ (0, 4, 8, 12); (1,5,9,13); (2,6,10,14); (3,7,11,15) ⁇ four VRB resource groups, each VRB resource group corresponding to a group of consecutive PRB resources, ie 4
  • the group PRB resource numbers are ⁇ (0,1,2,3); (12,13,14,15); (27,28,29,30); (39,40,41,42) ⁇ .
  • the base station 501 can allocate one of the groups, and the bandwidth occupied by the PRB corresponding to the VRB does not exceed the radio bandwidth of the radio bandwidth limited terminal.
  • the last 4 rows of the interleaver all 4 columns of VRBs are used as dedicated VRBs, and these VRB numbers are: 32 to 45, including: ⁇ (32, 36, 40, 44); , 37, 41); (34, 38, 42, 45); (35, 39, 43) ⁇ four VRB resource groups, each VRB resource group corresponding to a group of consecutive PRB resources, that is, 4 groups of PRB resource numbers respectively For ⁇ (8,9,10,11);(20,21,22);(35,36,37,38);(35,39,43) ⁇ .
  • the system bandwidth of the current cell is 50 RBs
  • N gap N gap2
  • the interleaver defined by the existing 3GPP protocol is reused, and all VRB numbers available for DVRB allocation are stored in the interleaver.
  • N gap N gap1 , all available VRBs need to be grouped, and each group of VRBs is interleaved using an existing interleaver.
  • the M rows and N columns (excluding NULL) VRBs in the interleaver are used as dedicated VRBs, and the radio bandwidth limited terminals receive the downlink data by using the PRBs corresponding to the VRBs.
  • the M line may be continuous or non-contiguous, and the maximum line number and the minimum line number difference in the M line occupy the bandwidth occupied by the VRBs not exceeding the radio frequency bandwidth of the terminal with limited radio frequency bandwidth.
  • N may be greater than the number of columns of the existing interleaver, for example, corresponding to multiple sets of interleaver VRB resources, the corresponding column number of the N column may be In a continuous or non-continuous manner, the M VRBs of each column are assigned as a VRB resource group to a radio-limited terminal.
  • all the VRBs of the first three rows of the interleaver are divided into two groups of separate interleaving, and all eight columns of VRBs are used as dedicated VRBs.
  • the numbers of these VRBs are 0 to 11, 18 to 29, and are divided into : ⁇ (0,4,8);(1,5,9);(2,6,10);(3,7,11);(18,22,26);(19,23,27); (20,24,28); (21,25,29) ⁇ eight VRB resource groups, each VRB resource group corresponding to a group of consecutive PRB resources, that is, 8 groups of PRB resource numbers are respectively ⁇ (0,1,2) ;(6,7,8);(9,10,11);(15,16,17);(18,19,20);(24,25,26);(27,28,29);( 33,34,35) ⁇ .
  • the base station 301 transmits the information of the number of the dedicated VRB through the PBCH.
  • the information of the number of the dedicated VRB includes information indicating that the number of the dedicated VRB occupies the number of the row of the interleaver and the number of the occupied column.
  • Mode 2 is applicable to the case where the dedicated VRB occupies consecutive M lines.
  • the information of the number of the dedicated VRB includes: information indicating the value of M.
  • the number of bits used by the information may be set, for example, 3 bits; and the number used to indicate the dedicated VRB is occupied by the interleaver.
  • the first M line or the last M line information the information can use 1 bit, at this time the dedicated VRB occupies the first M line or the last M line of the interleaver.
  • the number of the dedicated VRB occupies the information of the number of the column of the interleaver, for example, the bitmap 2 of the foregoing manner.
  • the number of the dedicated VRB occupies the number of all VRBs except the null NULL element in the interleaver.
  • the information of the number of the dedicated VRB in the mode 3 includes: information indicating that the number of the dedicated VRB occupies the number of all VRBs except the NULL element in the interleaver.
  • the embodiment of the present invention further provides a terminal, a base station, and a data transmission method. Since the principle of solving the problem is similar to the wireless communication system provided by the embodiment of the present invention, the implementation may refer to the implementation of the wireless communication system. The repetitions are not repeated here.
  • FIG. 7 is a schematic structural diagram of a first base station according to an embodiment of the present invention. As shown in FIG. 7, the base station includes:
  • the processing module 701 is configured to determine a number of a dedicated VRB used for downlink data transmission to a set number of radio frequency bandwidth limited terminals in the current cell, and write the determined dedicated VRB number to the interleaver in order, Then, the number of the dedicated VRB is read out from the interleaver column by column, and then mapped to the number of the PRB;
  • the sending module 702 is configured to perform downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell on the PRB corresponding to the number of the mapped PRBs;
  • the number of the dedicated VRB is satisfied: after being placed in the interleaver row by row, occupying the M row and the N column of the interleaver, wherein, within one transmission time interval TTI, the base station has a limited radio frequency bandwidth in the current cell.
  • the VRB used by the terminal for downlink transmission is located in one column of the N columns; and the radio bandwidth occupied by the M row_UE resource block RBs is not greater than the terminal with the smallest radio frequency bandwidth among the set number of radio bandwidth limited terminals in the current cell.
  • the radio frequency bandwidth, M row_UE is the difference between the maximum value and the minimum value of the number of the line occupied by the dedicated VRB after being placed in the interleaver, and M row_UE , M, N are positive integers.
  • the sending module 702 is further configured to:
  • the information of the number of the dedicated VRB is transmitted to the set number of terminals whose radio bandwidth is limited in the current cell.
  • the information of the number of the dedicated VRB includes information indicating that the number of the dedicated VRB occupies the number of the row of the interleaver and the number of the occupied column.
  • the information of the number of the dedicated VRB includes:
  • the information of the number of the dedicated VRB includes:
  • the information of the number of the dedicated VRB further includes:
  • the information of the number of the dedicated VRB includes:
  • processing module 701 is further configured to:
  • the RB interval value is determined according to the system bandwidth of the current cell before the determined number of the dedicated VRB is sequentially written to the interleaver in order.
  • the sending module 702 is further configured to:
  • the RB interval value information is sent to the set number of radio frequency bandwidth limited terminals in the current cell.
  • the terminal with limited radio frequency bandwidth is an M2M terminal.
  • the sending module 702 is specifically configured to:
  • Downlink data transmission is performed to the set number of radio frequency bandwidth limited terminals in the current cell by using the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH.
  • the base station For other optional implementation manners of the base station, reference may be made to the base station 301 in the wireless communication system provided by the embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a second base station according to an embodiment of the present invention. As shown in FIG. 8, the base station includes:
  • the processor 801 is configured to determine a number of a dedicated VRB used for downlink data transmission to a set number of radio frequency bandwidth limited terminals in the current cell, and write the determined dedicated VRB number to the interleaver in order, After being read out column by column from the interleaver, it is mapped to the number of the PRB;
  • the transmitter 802 is configured to perform downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell on the PRB corresponding to the number of the mapped PRBs;
  • the number of the dedicated VRB is satisfied: after being placed in the interleaver row by row, occupying the M row and the N column of the interleaver, wherein, within one transmission time interval TTI, the base station has a limited radio frequency bandwidth in the current cell.
  • the VRB used by the terminal for downlink transmission is located in one column of the N columns; and the radio bandwidth occupied by the M row_UE resource block RBs is not greater than the terminal with the smallest radio frequency bandwidth among the set number of radio bandwidth limited terminals in the current cell.
  • the radio frequency bandwidth, M row_UE is the difference between the maximum value and the minimum value of the number of the line occupied by the dedicated VRB after being placed in the interleaver, and M row_UE , M, N are positive integers.
  • the processor 801 refers to the foregoing processing module 701.
  • the transmitter 802 refers to the foregoing sending module 702.
  • the base station may also refer to the foregoing wireless communication system. The base station 301 in the alternative is not repeated here.
  • FIG. 9 is a schematic structural diagram of a third base station according to an embodiment of the present invention. As shown in FIG. 9, the base station includes:
  • the processing module 901 is configured to determine, in the current cell, a set number of terminals with limited radio frequency bandwidth Performing K packets to which the dedicated VRB used for downlink data transmission belongs, wherein, in one transmission time interval TTI, the VRB used for downlink data transmission to a radio bandwidth limited terminal in the current cell belongs to K packets.
  • a group, K is a positive integer;
  • the sending module 902 is configured to: for each of the K packets, the set number of radio frequency bandwidths in the current cell is limited on the PRB corresponding to the number of the PRBs with the same number of VRBs in the packet.
  • the terminal performs downlink data transmission;
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell; the M group_UE is determined separately for each of the K packets. The difference between the maximum value and the minimum value of the VRB number in a packet, and the maximum value determined in each difference value.
  • the sending module 902 is further configured to:
  • the group identification information of the K packets is sent to the set number of terminals whose radio frequency bandwidth is limited in the current cell.
  • the terminal with limited radio frequency bandwidth is an M2M terminal.
  • the sending module 902 is specifically configured to:
  • Downlink data transmission is performed to the set number of radio frequency bandwidth limited terminals in the current cell by using the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH.
  • FIG. 10 is a schematic structural diagram of a fourth base station according to an embodiment of the present invention. As shown in FIG. 10, the base station includes:
  • the processor 1001 is configured to determine K packets that belong to a dedicated VRB used for downlink data transmission to a set number of radio frequency bandwidth limited terminals in the current cell, where, within one transmission time interval TTI, to the current cell A VRB used by a terminal with limited radio frequency bandwidth for downlink data transmission belongs to one of K packets, and K is a positive integer;
  • the transmitter 1002 is configured to: for each of the K packets, the set number of radio frequency bandwidths in the current cell is limited on the PRB corresponding to the number of the PRBs with the same number of VRBs in the packet.
  • the terminal performs downlink data transmission;
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell; the M group_UE is determined separately for each of the K packets. The difference between the maximum value and the minimum value of the VRB number in a packet, and the maximum value determined in each difference value.
  • the processor 1001 For other optional implementations of the processor 1001, reference may be made to the foregoing processing module 901. Other optional implementation manners of the transmitter 1002 may refer to the foregoing sending module 902. In addition, other optional implementation manners of the base station may refer to the present invention.
  • the base station 301 in Option 2 of the wireless communication system provided by the embodiment is not repeated here.
  • FIG. 11 is a schematic structural diagram of a first terminal according to an embodiment of the present invention. As shown in FIG. 11, the terminal includes:
  • the processing module 1101 is configured to determine a number of the dedicated VRB, where the dedicated VRB is a VRB used by the base station to perform downlink data transmission for the terminal with a limited number of radio frequency bandwidths in the current cell where the terminal is located; and determine that the number of the dedicated VRB is interleaved.
  • the number of the PRB obtained after mapping the device;
  • the receiving module 1102 is configured to receive downlink data transmission performed by the base station in the current cell on the PRB corresponding to the number of the mapped PRB obtained by the processing module 1101.
  • the number of the dedicated VRB is satisfied: after being placed into the interleaver row by row, occupying M rows and N columns of the interleaver, wherein a radio frequency bandwidth limited terminal in the current cell is received in a transmission time interval TTI
  • the VRBs used for the downlink transmission are located in the 1 column of the N columns; and the radio bandwidth occupied by the M row_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of terminals in the current cell.
  • the M row_UE is the maximum value and the minimum value of the number of the line occupied by the VRB used by the downlink data transmission sent by the base station to the set number of radio frequency bandwidth limited terminals in the current cell after being placed in the interleaver.
  • the difference, M row_UE , M, N is a positive integer.
  • the processing module 1101 is specifically configured to: receive, by the receiving module 1102, information about a number of a dedicated VRB sent by the base station, and determine a number of the dedicated VRB according to the information of the number of the received dedicated VRB.
  • the information of the number of the dedicated VRB includes information indicating that the number of the dedicated VRB occupies the number of the row of the interleaver and the number of the occupied column.
  • the information of the number of the dedicated VRB includes:
  • the information of the number of the dedicated VRB includes:
  • the information of the number of the dedicated VRB further includes:
  • the information of the number of the dedicated VRB includes:
  • the receiving module 1102 is further configured to: before receiving the downlink transmission performed by the base station, on the PRB corresponding to the number of the mapped PRB obtained by the processing module 1101, receiving information about the RB interval value sent by the base station;
  • the processing module 1101 is further configured to: determine, according to the RB interval value received by the receiving module 1102, the number of the PRB obtained by the number of the dedicated VRB after being mapped by the interleaver.
  • the radio bandwidth limited terminal is a machine to machine M2M terminal.
  • the receiving module 1102 is specifically configured to:
  • FIG. 12 is a schematic structural diagram of a second terminal according to an embodiment of the present invention. As shown in FIG. 12, the terminal includes:
  • the processor 1201 is configured to obtain the information of the number of the dedicated VRB, and the dedicated VRB is the VRB used by the base station to perform downlink data transmission to the terminal with a limited number of radio frequency bandwidths in the current cell where the terminal is located; and determine the number of the dedicated VRB.
  • the number of the PRB obtained after the mapping by the interleaver;
  • the receiver 1202 is configured to receive downlink data transmission performed by the base station in the current cell on the PRB corresponding to the number of the mapped PRB obtained by the processor 1201.
  • the number of the dedicated VRB is satisfied: after being placed into the interleaver row by row, occupying M rows and N columns of the interleaver, wherein a radio frequency bandwidth limited terminal in the current cell is received in a transmission time interval TTI
  • the VRBs used for the downlink transmission are located in the 1 column of the N columns; and the radio bandwidth occupied by the M row_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio bandwidth limited terminals in the current cell.
  • the M row_UE is the difference between the maximum value and the minimum value of the number of the VRB used by the base station to perform downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell after being placed in the interleaver.
  • the value, M row_UE , M, N is a positive integer.
  • the processor 1201 For other optional implementations of the processor 1201, reference may be made to the foregoing processing module 1101. Other optional implementation manners of the receiver 1202 may refer to the foregoing receiving module 1102. In addition, other optional manners of the terminal may be implemented by referring to the present invention. For an alternative implementation in the wireless communication system provided by the example, the terminal 302 will not be described again.
  • FIG. 13 is a schematic structural diagram of a third terminal according to an embodiment of the present invention. As shown in FIG. 13, the terminal includes:
  • the processing module 1301 is configured to determine, in the current cell where the terminal is located, the K packets to which the dedicated VRB used for performing downlink data transmission to the terminal of the set number of radio frequency bandwidth restrictions; wherein, in one transmission time interval TTI, the base station The VRB used for downlink data transmission to a radio bandwidth limited terminal in the current cell belongs to one of K packets, and K is a positive integer;
  • the receiving module 1302 is configured to receive downlink data transmission performed by the base station on the PRB corresponding to the number of the PRB with the same number of the VRB in each of the K packets.
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell;
  • M group_UE is a value that determines the difference between the maximum value and the minimum value of the VRB number in each of the K packets, and determines the maximum value among the respective differences.
  • processing module 1301 is specifically configured to:
  • the group identification information of the K packets sent by the base station is received by the receiving module 1302; and K packets are determined according to the group identification information received by the receiving module.
  • the radio bandwidth limited terminal is a machine to machine M2M terminal.
  • the receiving module 1302 is specifically configured to:
  • FIG. 14 is a schematic structural diagram of a fourth terminal according to an embodiment of the present invention. As shown in FIG. 14, the terminal includes:
  • the processor 1401 is configured to determine, in the current cell where the terminal is located, the K packets to which the dedicated VRB used for performing downlink data transmission to the terminal of the set number of radio frequency bandwidth restrictions; wherein, in one transmission time interval TTI, the base station The VRB used for downlink data transmission to a radio bandwidth limited terminal in the current cell belongs to one of K packets, and K is a positive integer;
  • Receiver 1402 for using the same number of VRBs in each of the K packets The downlink data transmission performed by the receiving base station on the PRB corresponding to the number of the PRB;
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell;
  • M group_UE is a value that determines the difference between the maximum value and the minimum value of the VRB number in each of the K packets, and determines the maximum value among the respective differences.
  • FIG. 15 is a flowchart of a first data transmission method according to an embodiment of the present invention. As shown in FIG. 15, the method includes the following steps:
  • the base station determines a number of a dedicated VRB used for downlink data transmission to a set number of radio frequency bandwidth limited terminals in the current cell;
  • the base station writes the determined number of the dedicated VRBs to the interleaver in order, and then reads the number of the dedicated VRB column by column from the interleaver, and then maps to the number of the PRB;
  • the base station performs downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell on the PRB corresponding to the number of the mapped PRB.
  • the number of the dedicated VRB is satisfied: after being placed in the interleaver row by row, occupying the M row and the N column of the interleaver, wherein, within one transmission time interval TTI, the base station has a limited radio frequency bandwidth in the current cell.
  • the VRB used by the terminal for downlink transmission is located in one column of the N columns; and the radio bandwidth occupied by the M row_UE resource block RBs is not greater than the terminal with the smallest radio frequency bandwidth among the set number of radio bandwidth limited terminals in the current cell.
  • the radio frequency bandwidth, M row_UE is the difference between the maximum value and the minimum value of the number of the line occupied by the dedicated VRB after being placed in the interleaver, and M row_UE , M, N are positive integers.
  • the base station performs the set number of radio frequency bandwidth limited terminals in the current cell. Before the downlink transmission, it also includes:
  • the base station sends the information of the number of the dedicated VRB to the set number of radio frequency bandwidth limited terminals in the current cell.
  • the information of the number of the dedicated VRB includes information indicating that the number of the dedicated VRB occupies the number of the row of the interleaver and the number of the occupied column.
  • the information of the number of the dedicated VRB includes:
  • the information of the number of the dedicated VRB includes:
  • the information of the number of the dedicated VRB further includes:
  • the information of the number of the dedicated VRB includes:
  • the method further includes:
  • the base station determines the RB interval value according to the system bandwidth of the current cell.
  • the method before the downlink data transmission by the base station to the set number of radio frequency bandwidth limited terminals in the current cell, the method further includes:
  • the base station sends the information of the RB interval value to the set number of radio frequency bandwidth limited terminals in the current cell.
  • the radio bandwidth limited terminal is a machine to machine M2M terminal.
  • the base station performs downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell, including:
  • the base station performs downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell through the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH.
  • FIG. 16 is a flowchart of a second data transmission method according to an embodiment of the present invention. As shown in FIG. 16, the method includes the following steps:
  • the base station determines, in the current cell, K packets to which the dedicated VRB used for downlink data transmission to the set number of radio frequency bandwidth limited terminals belongs, wherein, within one transmission time interval TTI, to one radio frequency bandwidth in the current cell
  • the VRB used by the restricted terminal for downlink data transmission belongs to one of K packets, and K is a positive integer;
  • the base station For each of the K packets, the base station performs downlink to the set number of radio frequency bandwidth limited terminals in the current cell on the PRB corresponding to the number of the PRB with the same VRB number in the packet. data transmission;
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell;
  • M group_UE is a maximum value determined by determining a difference between a maximum value and a minimum value of a VRB number in each of the K groups, and determining each of the difference values.
  • the method before the downlink data transmission by the base station to the set number of radio frequency bandwidth limited terminals in the current cell, the method further includes:
  • the base station sends group identification information of K packets to the set number of radio frequency bandwidth limited terminals in the current cell.
  • the radio bandwidth limited terminal is a machine to machine M2M terminal.
  • the base station performs downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell, including:
  • the base station performs downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell by using the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH.
  • FIG. 17 is a flowchart of a third data transmission method according to an embodiment of the present invention. As shown in FIG. 17, the method includes the following steps:
  • the terminal with limited radio frequency bandwidth in the current cell determines the number of the dedicated VRB, and the dedicated VRB is the VRB used by the base station to perform downlink data transmission to the terminal with a limited number of radio bandwidths in the current cell.
  • the terminal determines the number of the PRB obtained after the number of the dedicated VRB is mapped by the interleaver, and receives the downlink data transmission performed by the base station in the current cell on the PRB corresponding to the number of the mapped PRB.
  • the number of the dedicated VRB is satisfied: after being placed into the interleaver row by row, occupying M rows and N columns of the interleaver, wherein a radio frequency bandwidth limited terminal in the current cell is received in a transmission time interval TTI
  • the VRBs used for the downlink transmission are located in the 1 column of the N columns; and the radio bandwidth occupied by the M row_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio bandwidth limited terminals in the current cell.
  • the M row_UE is the maximum value and the minimum value of the number of the line occupied by the VRB used by the terminal receiving the downlink data transmission sent by the terminal receiving the base station in the current cell.
  • the difference, M row_UE , M, N is a positive integer.
  • the terminal determines the number of the dedicated VRB, including:
  • the terminal receives the information of the number of the dedicated VRB sent by the base station; and determines the number of the dedicated VRB based on the received information.
  • the information of the number of the dedicated VRB includes information indicating that the number of the dedicated VRB occupies the number of the row of the interleaver and the number of the occupied column.
  • the number of the dedicated VRB occupies the first M rows of the interleaver
  • the number of the dedicated VRB is Information includes:
  • the information of the number of the dedicated VRB includes:
  • the information of the number of the dedicated VRB further includes:
  • the information of the number of the dedicated VRB includes:
  • the terminal before the receiving, by the terminal, the number of the PRB obtained by the inter-interleaver mapping of the number of the dedicated VRB, and receiving the downlink transmission by the base station on the PRB corresponding to the number of the mapped PRB, the terminal further includes:
  • the terminal receives information of an RB interval value sent by the base station;
  • the terminal determines the number of the PRB obtained by the number of the dedicated VRB after being mapped by the interleaver according to the received RB interval value.
  • the radio bandwidth limited terminal is a machine to machine M2M terminal.
  • the terminal receives the downlink data transmission performed by the base station, including:
  • the terminal receives downlink data transmission by the base station through the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH.
  • FIG. 18 is a flowchart of a fourth data transmission method according to an embodiment of the present invention. As shown in FIG. 18, the method includes the following steps:
  • the terminal with limited radio frequency bandwidth in the current cell determines K packets to which the dedicated VRB used by the base station to perform downlink data transmission to the terminal with a limited number of radio frequency bandwidth restrictions in the current cell; wherein, at one transmission time interval TTI The VRB used by the base station to perform downlink data transmission to a radio bandwidth limited terminal in the current cell belongs to one of the K packets, and K is a positive integer;
  • the terminal receives the downlink data transmission performed by the base station on the PRB corresponding to the number of the PRB with the same number of the VRB in each of the K packets.
  • the radio frequency bandwidth occupied by the M group_UE resource block RBs is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of radio frequency bandwidth limited terminals in the current cell;
  • M group_UE is a value that determines the difference between the maximum value and the minimum value of the VRB number in each of the K packets, and determines the maximum value among the respective differences.
  • the terminal determines K packets, including:
  • the terminal receives group identification information of K packets sent by the base station;
  • the terminal determines K packets according to the received group identification information.
  • the radio bandwidth limited terminal is a machine to machine M2M terminal.
  • the terminal receives the downlink data transmission performed by the base station, including:
  • the terminal receives downlink data transmission by the base station through the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH.
  • the embodiments of the present invention provide the following two options:
  • the first option is that, in a TTI, the VRB occupied by the base station for downlink transmission to a terminal with limited radio frequency bandwidth occupies 1 column; and the dedicated VRB occupies the difference between the maximum value and the minimum value of the row number of the interleaver.
  • the radio frequency bandwidth occupied by the M row_UE resource block RB is not greater than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell, and the interleaver is mapped by using the travel list, after being mapped by the interleaver, in the interleaver A column is mapped to the numbered consecutive PRBs, so that the VRBs occupied by one terminal are mapped to be no more than M row_UE PRBs, regardless of whether the M row_UE PRBs are consecutively numbered, the bandwidth occupied by the M row_UE PRBs does not exceed the terminal.
  • the RF bandwidth ensures that the terminal with limited RF bandwidth normally receives downlink data.
  • the dedicated VRB used by the base station to perform downlink data transmission to the radio bandwidth limited terminal in the current cell belongs to K packets, and each packet is used for downlink data transmission of one terminal, and the above M in K packets
  • the radio frequency bandwidth occupied by the group_UE resource block RB is not greater than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell, and the base station uses the same VRB number in the packet corresponding to the terminal when performing downlink data transmission to the terminal.
  • the PRB corresponds to the PRB, so that the bandwidth occupied by the downlink data transmission to the terminal in one TTI is not greater than the radio frequency bandwidth of the terminal, and the normal reception of the downlink data of the terminal with limited radio bandwidth is ensured.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the device is implemented in a flow chart or Multiple processes and/or block diagrams The functions specified in one or more boxes.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte au domaine technique des communications sans fil, et en particulier, à un terminal, une station de base et un procédé de transmission de données. Dans une station de base, un module de traitement détermine de mettre en correspondance des numéros de blocs de ressources virtuelles (VRB) dédiés avec des numéros de blocs de ressources physiques (PRB) ; et un module d'envoi transmet des données de liaison descendante à un terminal avec des largeurs de bande de fréquence radio limitées sur des PRB correspondant aux numéros mis en correspondance des PRB. Les VRB utilisés transmis par la station de base au terminal à l'intérieur d'un intervalle de temps de transmission (TTI) occupent une colonne d'entrelaceurs, et des largeurs de bande de fréquence radio occupées par Mrow_UE blocs de ressources (RB) ne sont pas supérieures à celles du terminal, Mrow_UE se référant à une différence entre des valeurs maximales et des valeurs minimales de numéros de rangée des entrelaceurs occupés par les VRB dédiés. Les entrelaceurs sont mis en correspondance dans un mode entrée de rangée-sortie de colonne, et une colonne d'entrelaceurs est mise en correspondance avec les PRB avec des numéros successifs, de telle sorte que des VRB occupés par le terminal sont mis en correspondance avec des PRB, la quantité des PRB n'étant pas supérieure à Mrow_UE. Les largeurs de bande occupées par les Mrow_UE PRB ne dépassent pas les largeurs de bande de fréquence radio du terminal, et il est garanti que les Mrow_UE PRB sont reçus normalement par le terminal avec les largeurs de bande de fréquence radio limitées.
PCT/CN2015/077378 2015-04-24 2015-04-24 Terminal, station de base et procédé de transmission de données WO2016169046A1 (fr)

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