CN107005996A

CN107005996A - A kind of terminal, base station and data transmission method

Info

Publication number: CN107005996A
Application number: CN201580066628.4A
Authority: CN
Inventors: 张应余; 龚政委
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-04-24
Filing date: 2015-04-24
Publication date: 2017-08-01
Anticipated expiration: 2035-04-24
Also published as: WO2016169046A1; CN107005996B

Abstract

The present invention relates to wireless communication technology field, more particularly to terminal, base station and data transmission method.In a kind of base station, processing module determines particular virtual resource block VRB numbering being mapped in Physical Resource Block PRB numbering；Sending module numbers the terminal transmission downlink data being limited on corresponding PRB to radio frequency bandwidth in the PRB being mapped to.The VRB that base station is used to a terminal transmission in one Transmission Time Interval TTI takes interleaver 1 and arranged, and special VRB takes the difference M of the maxima and minima of the line number of interleaver_{row_UE}Radio frequency bandwidth shared by individual resource block RB is not more than terminal radio frequency bandwidth, and interleaver is listed mode using traveling and mapped, and a row are mapped on the continuous PRB of numbering in interleaver, the VRB that a terminal takes is mapped to no more than M_{row_UE}On individual PRB, M_{row_UE}The bandwidth that individual PRB takes is no more than terminal radio frequency bandwidth, it is ensured that the limited terminal of radio frequency bandwidth is normally received.

Description

Terminal, base station and data transmission method

Technical Field

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.

Background

With the development of Mobile internet technology, Long Term Evolution (LTE) System is replacing Global System for Mobile communications (GSM) and Wideband Code Division Multiple Access (WCDMA) systems, and becomes the mainstream wireless communication System.

With the development of technologies such as the internet of things, a Machine to Machine (M2M) system based on an LTE system, referred to as an "LTE M2M system," is rapidly developed. The terminal applied to the LTE M2M system, referred to as "M2M terminal", has a main feature of low cost compared to the existing terminal applied to a Human-to-Human (H2H) system. Reducing the radio frequency bandwidth of the terminal is an important means for reducing the cost of the terminal.

Currently, in an LTE system, transmission resources of PDCCH channels are distributed over the entire system bandwidth, a terminal performs blind detection on the PDCCH channels over the entire system bandwidth, when the entire system bandwidth is greater than a radio frequency bandwidth of an M2M terminal, the M2M terminal cannot completely receive the PDCCH channels, and the PDCCH channels may carry some scheduling signaling, where the scheduling signaling is used to schedule the terminal to receive broadcast information sent on a Physical Downlink Shared CHannel (PDSCH), for example: system Information (System Information), Paging (Paging) messages, and Random Access Response (RAR) messages, among others. Therefore, the M2M terminal cannot receive the PDCCH completely, which results in that it cannot receive the existing broadcast class information.

In summary, when the radio frequency bandwidth of terminals with limited radio frequency bandwidth, such as M2M terminals, is smaller than the system bandwidth, if the transmission resources of downlink data are allocated based on the DVRB scheme when downlink data is transmitted to these terminals, the resources are distributed over the entire system bandwidth, and therefore these terminals cannot complete downlink data reception.

Disclosure of Invention

The embodiment of the invention provides a terminal, a base station and a data transmission method, which are used for solving the problem that the terminal cannot normally receive downlink data in a scene that the radio frequency bandwidth of the terminal with limited radio frequency bandwidth is smaller than the radio frequency bandwidth.

In a first aspect, an embodiment of the present invention provides a base station, including:

a processing module, configured to determine a number of dedicated VRBs used for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell; writing the determined serial numbers of the special VRBs into an interleaver line by line in sequence, reading the serial numbers of the special VRBs from the interleaver line by line, and mapping the serial numbers of the special VRBs to the serial numbers of PRBs;

a sending module, configured to perform downlink data transmission on the PRBs corresponding to the mapped PRBs numbers to the terminals with limited radio frequency bandwidth in the set number in the current cell;

wherein the number of the dedicated VRB satisfies: after the VRB is put into an interleaver in sequence and row by row, M rows and N columns of the interleaver are occupied, wherein in a transmission time interval TTI, VRB used by the base station for downlink transmission to a terminal with limited radio frequency bandwidth in the current cell is positioned in 1 column of the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth among the terminals with the limited radio frequency bandwidth of the set number in the current cell, M_{row_UE}Is the difference between the maximum and minimum of the number of the line occupied by the number of the dedicated VRB after being put into the interleaver, M_{row_UE}M, N is a positive integer.

With reference to the first aspect, in a first possible implementation manner, the sending module is further configured to:

transmitting information of the number of the dedicated VRBs to the set number of terminals with limited radio frequency bandwidth in the current cell before downlink transmission to the set number of terminals with limited radio frequency bandwidth in the current cell.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner,

the information of the number of the dedicated VRB includes: information indicating a number of rows occupying the interleaver and a number of columns occupied by the number of the dedicated VRB.

With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner, when the number of the dedicated VRB occupies a first M rows of the interleaver, the information of the number of the dedicated VRB includes:

information indicating a value of the M; and

information indicating that the number of the dedicated VRB occupies the first M rows of the interleaver.

With reference to the first possible implementation manner of the first aspect, in a fourth possible implementation manner, when the number of the dedicated VRB occupies a last M row of the interleaver, the information of the number of the dedicated VRB includes:

information indicating a value of the M; and

information indicating that the number of the dedicated VRB occupies the last M rows of the interleaver.

With reference to the third or fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the information of the number of the dedicated VRB further includes:

information indicating that the number of the dedicated VRB occupies the number of columns of the interleaver.

With reference to the first possible implementation manner of the first aspect, in a sixth possible implementation manner, when the number of the dedicated VRB occupies numbers of all VRBs except for a NULL element in the interleaver, the information of the number of the dedicated VRB includes:

information indicating that the number of the dedicated VRB occupies the numbers of all VRBs in the interleaver except the NULL element.

With reference to the first aspect or any one of the first to sixth possible implementation manners of the first aspect, in a seventh possible implementation manner, the processing module is further configured to:

and before the determined serial numbers of the special VRBs are written into the interleaver line by line in sequence, determining an RB interval value according to the system bandwidth of the current cell.

With reference to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner, the sending module is further configured to:

transmitting information of the RB interval value to the terminals in the current cell whose radio frequency bandwidth is limited, before performing downlink data transmission to the set number of terminals in the current cell whose radio frequency bandwidth is limited.

With reference to the first aspect or any one of the first to eighth possible implementation manners of the first aspect, in a ninth possible implementation manner, the radio frequency bandwidth-limited terminal is an M2M terminal.

With reference to the first aspect or any one of the first to ninth possible implementation manners of the first aspect, in a tenth possible implementation manner, the sending module is specifically configured to:

and performing downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).

In a second aspect, an embodiment of the present invention provides a base station, including:

a processing module, configured to determine K groups to which dedicated VRBs used for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell belong, where a VRB used for downlink data transmission to a terminal with limited radio frequency bandwidth in the current cell belongs to one of the K groups in a transmission time interval TTI, and K is a positive integer;

a transmission module configured to perform downlink data transmission on PRBs corresponding to the same number of PRBs as the VRBs in each of the K packets to the set number of terminals with a limited radio frequency bandwidth in the current cell;

wherein M is_{group_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth limited terminals of the set number in the current cellThe radio frequency bandwidth of the terminal with the minimum medium radio frequency bandwidth; m_{group_UE}The difference value between the maximum value and the minimum value of the VRB numbers in each of the K groups is respectively determined, and the maximum value is determined in each difference value.

With reference to the second aspect, in a first possible implementation manner, the sending module is further configured to:

transmitting the group identification information of the K packets to the set number of terminals with limited radio frequency bandwidth in the current cell before performing downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the radio frequency bandwidth-limited terminal is an M2M terminal.

With reference to the second aspect, the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the sending module is specifically configured to:

In a third aspect, an embodiment of the present invention provides a terminal with a limited radio frequency bandwidth, including:

a processing module, configured to determine a number of a dedicated VRB, where the dedicated VRB is a VRB used by a base station to perform downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell where the terminal is located; determining the PRB number obtained after the number of the special VRB is mapped by an interleaver;

a receiving module, configured to receive, on the PRB corresponding to the mapped PRB number obtained by the processing module, downlink data transmission performed by the base station in the current cell;

wherein the number of the dedicated VRB satisfies: after the data are put into the interleaver line by line in sequence, M lines and N columns of the interleaver are occupied, wherein, in one row, M lines and N columns of the interleaver are occupiedWithin a transmission time interval TTI, a VRB used by a terminal with limited radio frequency bandwidth in the current cell for receiving downlink transmission is positioned in 1 column of the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of terminals with limited radio frequency bandwidth in the current cell, wherein M is_{row_UE}A difference value between a maximum value and a minimum value of numbers of rows occupied by numbers of VRBs used for receiving downlink data transmission sent by the base station for the set number of terminals with limited radio frequency bandwidth in the current cell after the VRBs are placed in the interleaver, M_{row_UE}M, N is a positive integer.

With reference to the third aspect, in a first possible implementation manner,

the processing module is specifically configured to: receiving, by the receiving module, information of the number of the dedicated VRB sent by the base station; and determining the number of the special VRB according to the received information of the number of the special VRB.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner,

With reference to the first possible implementation manner of the third aspect, in a third possible implementation manner, when the number of the dedicated VRB occupies a first M rows of the interleaver, the information of the number of the dedicated VRB includes:

information indicating a value of the M; and

With reference to the first possible implementation manner of the third aspect, in a fourth possible implementation manner, when the number of the dedicated VRB occupies a last M rows of the interleaver, the information of the number of the dedicated VRB includes:

information indicating a value of the M; and

With reference to the third or fourth possible implementation manner of the third aspect, in a fifth possible implementation manner, the information of the number of the dedicated VRB further includes:

With reference to the first possible implementation manner of the third aspect, in a sixth possible implementation manner, when the number of the dedicated VRB occupies numbers of all VRBs except for a NULL element in the interleaver, the information of the number of the dedicated VRB includes:

With reference to the third aspect or any one of the first to sixth possible implementation manners of the third aspect, in a seventh possible implementation manner of the third aspect,

the receiving module is further configured to: receiving information of an RB interval value sent by the base station before receiving downlink transmission performed by the base station on a PRB corresponding to the mapped PRB number obtained by the processing module;

the processing module is further configured to: and determining the PRB number obtained after the serial number of the special VRB is mapped by the interleaver according to the RB interval value received by the receiving module.

With reference to the third aspect or any one of the first to seventh possible implementation manners of the third aspect, in an eighth possible implementation manner of the third aspect, the radio frequency bandwidth-limited terminal is a machine-to-machine M2M terminal.

With reference to the third aspect, or any one of the first to eighth possible implementation manners of the third aspect, in a ninth possible implementation manner of the third aspect, the receiving module is specifically configured to:

and receiving downlink data transmission of the base station through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).

In a fourth aspect, an embodiment of the present invention provides a terminal with a limited radio frequency bandwidth, including:

a processing module, configured to determine K groups to which dedicated VRBs used by a base station for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell where the terminal is located belong; in a transmission time interval TTI, a VRB used by the base station for downlink data transmission to a terminal with limited radio frequency bandwidth in the current cell belongs to one of the K groups, 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 PRB number that is the same as a number of a VRB in each of the K groups;

wherein M is_{group_UE}The radio frequency bandwidth occupied by the resource blocks RB is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of terminals with limited radio frequency bandwidth in the current cell;

M_{group_UE}the difference value between the maximum value and the minimum value of the VRB numbers in each of the K groups is respectively determined, and the maximum value is determined in each difference value. .

With reference to the fourth aspect, in a first possible implementation manner, the processing module is specifically configured to:

receiving, by the receiving module, group identification information of the K groups sent by the base station; and determining the K groups according to the group identification information received by the receiving module.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the radio frequency bandwidth-limited terminal is a machine-to-machine M2M terminal.

With reference to the fourth aspect, the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the receiving module is specifically configured to:

In a fifth aspect, an embodiment of the present invention provides a data transmission method, including:

the base station determines the serial number of special VRBs used for transmitting downlink data to a set number of terminals with limited radio frequency bandwidth in a current cell;

the base station writes the determined serial numbers of the special VRBs into an interleaver line by line in sequence, reads the serial numbers of the special VRBs column by column from the interleaver and maps the serial numbers to the serial numbers of PRBs;

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 mapped PRB number;

With reference to the fifth aspect, in a first possible implementation manner, before the downlink transmission is performed by the base station to the terminal with a limited radio frequency bandwidth in the current cell, the method further includes:

and the base station transmits the information of the number of the dedicated VRB to the set number of terminals with limited radio frequency bandwidth in the current cell.

With reference to the first possible implementation manner of the fifth aspect, in a second possible implementation manner,

With reference to the first possible implementation manner of the fifth aspect, in a third possible implementation manner, when the number of the dedicated VRB occupies the first M rows of the interleaver, the information of the number of the dedicated VRB includes:

information indicating a value of the M; and

With reference to the first possible implementation manner of the fifth aspect, in a fourth possible implementation manner, when the number of the dedicated VRB occupies a last M row of the interleaver, the information of the number of the dedicated VRB includes:

information indicating a value of the M; and

With reference to the third or fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner, the information of the number of the dedicated VRB further includes:

With reference to the first possible implementation manner of the fifth aspect, in a sixth possible implementation manner, when the number of the dedicated VRB occupies numbers of all VRBs except for a NULL element in the interleaver, the information of the number of the dedicated VRB includes:

With reference to the fifth aspect or any one of the first to sixth possible implementation manners of the fifth aspect, in a seventh possible implementation manner, before the base station writes the determined numbers of the dedicated VRBs into the interleaver in sequence and row by row, the method further includes:

and the base station determines an RB interval value according to the system bandwidth of the current cell.

With reference to the seventh possible implementation manner of the fifth aspect, in an eighth possible implementation manner, before the base station performs downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell, the method further includes:

and the base station transmits the information of the RB interval value to the set number of terminals with limited radio frequency bandwidth in the current cell.

With reference to the fifth aspect or any one of the first to eighth possible implementation manners of the fifth aspect, in a ninth possible implementation manner, the radio frequency bandwidth-limited terminal is a machine-to-machine M2M terminal.

With reference to the fifth aspect or any one of the first to ninth possible implementation manners of the fifth aspect, in a tenth possible implementation manner, the method for transmitting downlink data by the base station to the set number of terminals with limited radio frequency bandwidth in the current cell includes:

and the base station transmits downlink data to the set number of terminals with limited radio frequency bandwidth in the current cell through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).

In a sixth aspect, an embodiment of the present invention provides a data transmission method, including:

a base station determines K groups to which special VRBs (virtual router blocks) used for downlink data transmission to a set number of radio frequency bandwidth-limited terminals in a current cell belong, wherein the VRBs used for downlink data transmission to one radio frequency bandwidth-limited terminal in the current cell belong to one of the K groups in a Transmission Time Interval (TTI), and K is a positive integer;

for each of the K packets, 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 PRB having the same number as the VRB in the packet;

wherein M is_{group_UE}One resource block RB accountThe radio frequency bandwidth used is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of terminals with limited radio frequency bandwidth in the current cell;

wherein M is_{group_UE}The difference value between the maximum value and the minimum value of the VRB numbers in each of the K groups is respectively determined, and the maximum value is determined in each difference value. .

With reference to the sixth aspect, in a first possible implementation manner, before the base station performs downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell, the method further includes:

and the base station sends the group identification information of the K groups to the set number of terminals with limited radio frequency bandwidth in the current cell.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the radio frequency bandwidth-limited terminal is a machine-to-machine M2M terminal.

With reference to the sixth aspect, the first possible implementation manner of the sixth aspect, or the second possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the performing, by the base station, downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell includes:

In a seventh aspect, an embodiment of the present invention provides a data transmission method, including:

determining the number of a special VRB (virtual router B) by a terminal with limited radio frequency bandwidth in a current cell, wherein the special VRB is a VRB used by a base station for transmitting downlink data to a set number of terminals with limited radio frequency bandwidth in the current cell;

the terminal determines the number of the PRB obtained after the number of the special VRB is mapped by the interleaver, and receives the downlink data transmission of the base station in the current cell on the PRB corresponding to the obtained mapped PRB number;

wherein the number of the dedicated VRB satisfies: after the VRBs are put into the interleaver in sequence and row by row, M rows and N columns of the interleaver are occupied, wherein in a transmission time interval TTI, a terminal with limited radio frequency bandwidth in the current cell receives 1 column of VRBs used for downlink transmission, and the VRBs are located in the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth in the set number of terminals with limited radio frequency bandwidth in the current cell, wherein M is_{row_UE}A difference value between the maximum value and the minimum value of the serial numbers of the VRBs used for receiving the downlink data transmission sent by the base station for the terminal with limited radio frequency bandwidth and set with skilled management in the current cell, wherein the serial numbers of the VRBs occupy the row after being placed in the interleaver, M_{row_UE}M, N is a positive integer.

With reference to the seventh aspect, in a first possible implementation manner, the determining, by the terminal, the number of the dedicated VRB includes:

the terminal receives the information of the serial number of the special VRB sent by the base station;

and the terminal determines the number of the special VRB according to the received information of the number of the special VRB.

With reference to the first possible implementation manner of the seventh aspect, in a second possible implementation manner,

With reference to the first possible implementation manner of the seventh aspect, in a third possible implementation manner, when the number of the dedicated VRB occupies a first M rows of the interleaver, the information of the number of the dedicated VRB includes:

information indicating a value of the M; and

With reference to the first possible implementation manner of the seventh aspect, in a fourth possible implementation manner, when the number of the dedicated VRB occupies a last M rows of the interleaver, the information of the number of the dedicated VRB includes:

information indicating a value of the M; and

With reference to the third or fourth possible implementation manner of the seventh aspect, in a fifth possible implementation manner, the information of the number of the dedicated VRB further includes:

With reference to the first possible implementation manner of the seventh aspect, in a sixth possible implementation manner, when the number of the dedicated VRB occupies numbers of all VRBs except for a NULL element in the interleaver, the information of the number of the dedicated VRB includes:

With reference to the seventh aspect or any one of the first to sixth possible implementations of the seventh aspect, in a seventh possible implementation of the seventh aspect,

before the terminal receives the downlink transmission performed by the base station, the method further includes:

the terminal receives the information of the RB interval value sent by the base station;

and the terminal determines the PRB number obtained after the serial number of the special VRB is mapped by the interleaver according to the received RB interval value.

With reference to the seventh aspect or any one of the first to seventh possible implementation manners of the seventh aspect, in an eighth possible implementation manner of the seventh aspect, the radio frequency bandwidth-limited terminal is a machine-to-machine M2M terminal.

With reference to the seventh aspect, or any one of the first to eighth possible implementation manners of the seventh aspect, in a ninth possible implementation manner of the seventh aspect, the receiving, by the terminal, downlink data transmission by the base station includes:

and the terminal receives downlink data transmission of the base station through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).

In an eighth aspect, an embodiment of the present invention provides a data transmission method, including:

the method comprises the steps that a terminal with limited radio frequency bandwidth in a current cell determines K groups to which special VRBs (virtual router blocks) used by a base station for transmitting downlink data to a set number of terminals with limited radio frequency bandwidth in the current cell belong; in a transmission time interval TTI, a VRB used by the base station for downlink data transmission to a terminal with limited radio frequency bandwidth in the current cell belongs to one of the K groups, and K is a positive integer;

the terminal receives downlink data transmission performed by the base station on a PRB corresponding to the PRB with the same number as the VRB in each of the K groups;

M_{group_UE}the difference value between the maximum value and the minimum value of the VRB numbers in each of the K groups is respectively determined, and the maximum value is determined in each difference value.

With reference to the eighth aspect, in a first possible implementation manner, the determining, by the terminal, the K packets includes:

the terminal receives the group identification information of the K groups sent by the base station;

and the terminal determines the K groups according to the received group identification information.

With reference to the eighth aspect or the first possible implementation manner of the eighth aspect, in a second possible implementation manner, the radio frequency bandwidth-limited terminal is a machine-to-machine M2M terminal.

With reference to the eighth aspect, the first possible implementation manner of the eighth aspect, or the second possible implementation manner of the eighth aspect, in a third possible implementation manner of the eighth aspect, the receiving, by the terminal, downlink data transmission by the base station includes:

In summary, embodiments of the present invention provide the following two alternatives:

alternative solution one, because in a TTI, the VRB used by the base station to perform downlink transmission to a terminal with limited radio frequency bandwidth occupies 1 column; and the difference M between the maximum value and the minimum value of the numbers of the rows of the interleaver occupied by the dedicated VRBs_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of a terminal with limited radio frequency bandwidth in the current cell, the interleaver performs mapping in a traveling listing mode, and after mapping of the interleaver, a column in the interleaver is mapped to PRBs with continuous numbers, so that VRBs occupied by one terminal are mapped to PRBs with continuous numbers not more than M_{row_UE}On one PRB, regardless of M_{row_UE}Whether the PRBs are numbered consecutively, M_{row_UE}The bandwidth occupied by the PRB does not exceed the radio frequency bandwidth of the terminal, so that the terminal with limited radio frequency bandwidth is ensured to normally receive downlink data.

In the second alternative, the dedicated VRB used by the base station for downlink data transmission to the terminal with limited radio frequency bandwidth in the current cell belongs to K groups, each group is used for downlink data transmission of one terminal, and M is the above M in the K groups_{group_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of a terminal with limited radio frequency bandwidth in a current cell, and when a base station transmits downlink data to the terminal, the base station uses the PRB with the same number as the PRB with the VRB in the group corresponding to the terminal, so that the bandwidth occupied by the downlink data transmission to the terminal is not more than the radio frequency bandwidth of the terminal in one TTI, and the condition that the downlink data of the terminal with limited radio frequency bandwidth is positive is ensuredAnd (4) receiving frequently.

Drawings

FIG. 1 is N_gap＝N_gap1A schematic diagram of a scheme for allocating Virtual Resource Block (VRB) resources based on a DVRB manner;

FIG. 2 is N_gap＝N_gap2A schematic diagram of a scheme for allocating VRB resources based on a DVRB mode;

fig. 3 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention;

figures 4 and 5 are schematic diagrams of schemes for allocating VRBs in example one;

FIG. 6 is a schematic diagram of a scheme for allocating VRBs in example two;

fig. 7 is a schematic structural diagram of a first base station according to an 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;

fig. 9 is a schematic structural diagram of a third base station according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a fourth base station according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a first terminal according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a second terminal according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a third terminal according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a fourth terminal according to an embodiment of the present invention;

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.

Detailed Description

To solve the above problem, the embodiments of the present invention provide the following two alternatives:

alternative scheme one

When a base station transmits downlink data to terminals with limited radio frequency bandwidth in a current cell, the base station determines the serial number of a special VRB used for transmitting the downlink data to the terminals; the base station maps the number of the determined dedicated VRB to the number of the PRB through the interleaver, and performs downlink data transmission to the terminals on the PRB corresponding to the mapped PRB number. And the terminal with limited radio frequency bandwidth in the current cell acquires the numbers of the special VRBs in the current cell in advance, and receives downlink data transmission performed by the base station on the PRBs corresponding to the PRBs with the numbers of the PRBs obtained after mapping the numbers of the special VRBs.

Wherein, the serial number of the special VRB satisfies the following conditions: after the signals are sequentially put into the interleaver line by line, M lines and N columns of the interleaver are occupied, wherein in a Transmission Time Interval (TTI), a VRB used by a base station for downlink Transmission to a terminal with limited radio frequency bandwidth in a current cell is positioned in 1 column of the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell, M_{row_UE}Difference between maximum and minimum of the number of the line occupied by the number of the dedicated VRB after insertion in the interleaver, M_{row_UE}M, N is a positive integer.

In an alternative scheme I, in one TTI, the VRB used by the base station for downlink transmission to a terminal with limited radio frequency bandwidth occupies 1 column; and the difference M between the maximum value and the minimum value of the numbers of the rows of the interleaver occupied by the dedicated VRBs_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not larger than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell, and the interleaver adopts the mode of marching to list for mapping and is subjected to intersectionAfter mapping of the interleaver, one column in the interleaver is mapped to PRBs with continuous numbers, so that VRBs occupied by one terminal are mapped to not more than M_{row_UE}On one PRB, regardless of M_{row_UE}Whether the PRBs are numbered consecutively, M_{row_UE}The bandwidth occupied by the PRB does not exceed the radio frequency bandwidth of the terminal, so that the terminal with limited radio frequency bandwidth is ensured to normally receive downlink data.

Alternative scheme two

The base station determines K groups to which special VRBs used for downlink data transmission to a terminal with limited radio frequency bandwidth in a current cell belong, wherein the VRBs used for downlink data transmission to the terminal with limited radio frequency bandwidth in the current cell belong to one of the K groups in a Transmission Time Interval (TTI), and K is a positive integer;

for each of the K groups, the base station transmits downlink data to the terminal with limited radio frequency bandwidth in the current cell on the PRB corresponding to the PRB with the same number as the VRB in the group;

wherein M is_{group_UE}The radio frequency bandwidth occupied by the resource block RB is not larger than the radio frequency bandwidth of a terminal with limited radio frequency bandwidth in the current cell;

wherein M is_{group_UE}The difference value between the maximum value and the minimum value of the VRB numbers in each of the K groups is respectively determined, and the maximum value is determined in each difference value.

In the second alternative, the dedicated VRB used by the base station for downlink data transmission to the terminal with limited radio frequency bandwidth in the current cell belongs to K groups, each group is used for downlink data transmission of one terminal, and M is the above M in the K groups_{group_UE}The radio frequency bandwidth occupied by the resource block RB is not larger than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in the current cell, and when the base station transmits downlink data to the terminal, the base station uses the PRB corresponding to the PRB with the same number as the VRB in the group corresponding to the terminal, so that the bandwidth occupied by the downlink data transmission to the terminal is not larger than the radio frequency bandwidth of the terminal in one TTI, and the limitation of the radio frequency bandwidth is ensuredNormal reception of downlink data of the terminal.

The basic concept related to the embodiments of the present invention will be described below.

One, LVRB and DVRB

According to the third generation partnership project (3)^rd3GPP) Technical Specification (TS) 36.211, centralized type of virtual resource blocks (LVRB) are directly mapped onto physical resource blocks such that virtual resource block n is mapped onto physical resource block_VRBWith physical resource block n_PRB＝n_VRBAnd correspondingly.

If the resource allocation mode based on the LVRB is based, only one group of continuous PRB resources can be allocated, and the resource allocation mode based on the LVRB is poor in compatibility with the resource allocation mode based on the DVRB of the existing LTE system.

And the Virtual resource blocks (distributed types) of the distribution type are not directly mapped on the physical resource blocks. The parameters related to its mapping include Resource Block (RB) gap, which is defined as listed in table 6.2.3.2-1 in 3GPP TS 36.211.

TABLE 6.2.3.2-1 RB gap values

In table 1, the number of RBs included in the entire system bandwidth is represented. At a given system bandwidth, N_gapThe value size of (a) determines the number of interleaver rows.

FIG. 1 and FIG. 2 are each N_gap＝N_gap,1And N_gap＝N_gap,2And then, allocating the VRB based on the DVRB resource allocation mode.

As shown in fig. 1 and 2, for DVRB, several VRBs are allocated consecutively, and interleaving is performed in a row-by-row manner, as shown in step 1 in fig. 1 and 2, and block interleaving is performed for the first slot in step 1; different time slots VRB are processed by Cyclic Shift (Cyclic Shift), as shown in step 2 in FIG. 1 and FIG. 2, in step 2, for the second time slot, the Cyclic Shift processing is performed; and then mapping Virtual Resource Block (VRB) to Physical Resource Block (PRB) is completed, as shown in step 3 in fig. 1 and fig. 2.

In FIGS. 1 and 2, N_rowIs the number of rows of the interleaver, N_colFor the number of columns of the interleaver, P is the size of a Resource Block Group (RBG), and consecutive VRBs form a VRB interleaving unit. Meaning rounding up and meaning rounding down.

Taking the VRB allocation method shown in fig. 1 as an example, if VRBs with consecutive numbers 0,1,2, and 3 are allocated, the PRB numbers actually obtained in the first time slot are 0, 6, 18, and 24, and obviously, such DVRB allocation method makes the frequency interval between actual PRBs large, which is not favorable for M2M terminals with limited radio frequency bandwidth (for example, radio frequency bandwidth is 6 RBs).

Second, wireless communication system, base station and terminal

The embodiment of the invention can be applied to LTE systems such as Time Division duplex-Long Term Evolution (TDD LTE), Frequency Division duplex-Long Term Evolution (FDD LTE), Long Term Evolution-enhanced (LTE-Advanced) and the like, and can also be applied to other systems which need to carry out transmission resource mapping and distribution during data transmission.

In the embodiment of the invention, the base station is a network device which is in wireless connection with the terminal, and the base station can also have the function of wireless resource management.

The terminal is a terminal device communicating with the base station, and comprises user equipment, a relay node and the like. In the embodiment of the present invention, the radio frequency bandwidth of the terminal with limited radio frequency bandwidth is smaller than the system bandwidth of the system, for example: M2M terminal.

Such as: for LTE systems such as TDD LTE, FDD LTE, or LTE-a, the base station provided in the embodiment of the present invention may be an evolved NodeB (eNodeB), and the terminal is a User Equipment (UE).

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, a wireless communication system, a terminal and a base station, and finally a data transmission method are introduced.

Fig. 3 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention. As shown in fig. 3, the wireless communication system includes: a base station 301 and a terminal 302, and the base station 301 and the terminal 302 perform downlink data transmission therebetween, wherein the terminal 302 is a terminal with a limited radio frequency bandwidth.

As described above, in order to solve the problem that a terminal with a limited radio frequency bandwidth cannot normally receive downlink data, two alternatives are provided in the embodiment of the present invention, and the two alternatives are described below.

[ alternative solution one ]

In an alternative, the base station 301 and the terminal 302 are respectively configured to:

a base station 301, configured to determine the numbers of dedicated VRBs used for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell, write the determined numbers of dedicated VRBs into an interleaver in sequence and line by line, and read the numbers from the interleaver column by column, for example, mapping the numbers to PRB in a DVRB manner, and performing downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell on PRB corresponding to the mapped numbers of PRB;

and the terminal 302 is configured to determine the number of the dedicated VRB, determine the number of the PRB obtained after the number of the dedicated VRB is mapped by the interleaver, and receive 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.

Wherein, the number of the special VRB satisfies: after the signals are put into the interleaver line by line in sequence, M lines and N columns of the interleaver are occupied, wherein in a TTI, a VRB used by the base station 301 for downlink transmission to a terminal with limited radio frequency bandwidth in the current cell is located in 1 column of the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not larger than the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth among the set number of terminals with limited radio frequency bandwidth in the current cell, M_{row_UE}Maximum and minimum of the numbering of the lines occupied by the numbering of dedicated VRBs after insertion in the interleaverDifference of (D), M_{row_UE}M, N is a positive integer.

Wherein, the radio frequency bandwidths of all terminals with limited radio frequency bandwidths in the current cell may be the same, such as: occupying 6 RBs.

Alternatively, the radio frequency bandwidths of all terminals with limited radio frequency bandwidths in the current cell are not exactly the same, and in this case, M may be set according to the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth_{row_UE}The value of (c).

The radio frequency bandwidth-limited terminals of the set number may be all radio frequency bandwidth-limited terminals in communication with the base station in the current cell, for example: there are radio resource control, RRC, connected terminals.

Alternatively, the set number of terminals with limited radio frequency bandwidth may be some of all terminals with limited radio frequency bandwidth currently in communication with the base station in the cell.

In the following description, the radio frequency bandwidth-limited terminals in the set number are all radio frequency bandwidth-limited terminals currently in communication with the base station in the cell; the following description will be given by taking as an example that the bandwidths of all terminals with limited radio frequency bandwidths are the same.

Alternatively, the resource allocation is performed based on the DVRB, and an interleaver of the existing wireless communication system can be reused; alternatively, the aforementioned interleaving parameter of the existing wireless communication system, i.e., the RB gap value N, may be used_gap：N_gap,1And N_gap,2Alternatively, the definition can be seen in 3GPP TS36.211 table 6.2.3.2-1.

Alternatively, the base station 301 stores VRB numbers that can be assigned based on the DVRB scheme in the existing wireless communication system in the interleaver, and dedicates a part of rows and columns in the interleaver to terminals with limited radio frequency bandwidth, i.e., the aforementioned "dedicated VRB".

Such as: m rows and N columns of the interleaver, wherein optionally NULL is not included as dedicated VRB, and PRB resources corresponding to these dedicated VRBs are used for downlink data transmission of terminals with limited radio frequency bandwidth.

The M rows may be contiguous or non-contiguous, and the maximum of the M row-specific VRBThe difference between the line number and the minimum line number, i.e. M as described above_{row_UE}Satisfies the following conditions:

the M_{row_UE}The radio frequency bandwidth occupied by each RB is not larger than the radio frequency bandwidth of a terminal with limited radio frequency bandwidth in the current cell.

Optionally, the value of N is not greater than the number of columns of the existing interleaver, the column numbers of the corresponding N columns may be continuous or discontinuous, and M VRBs in each column are allocated to a terminal with limited radio frequency bandwidth as a VRB resource group.

At RB gap value N_gap＝N_gap,1An example of VRB allocation can be seen in example one, infra; in N_gap＝N_gap,2An example of VRB allocation can be seen in example two, below.

Alternatively, the position of the dedicated VRB number in the interleaver may be pre-agreed by a protocol, the base station 301 performs resource allocation to the radio frequency bandwidth-limited terminal using the pre-agreed position, and the terminal 302 receives downlink data according to the pre-agreed position.

Alternatively, the base station 301 may also transmit information of the number of the dedicated VRB to the terminal with the limited radio frequency bandwidth in the current cell; and terminal 302, being a terminal with limited radio frequency bandwidth in the current cell, may receive downlink data transmission on the PRB identified by the received PRB number to which the number of the dedicated VRB is mapped. An example of the numbered information of the dedicated VRB can be seen in example three, below.

The terminal 302 determines, according to a predetermined agreement of a protocol or according to the information of the numbers of the dedicated VRBs sent by the base station 301, which VRBs in the interleaver have the numbers used for transmitting downlink data of the terminal with a limited radio frequency bandwidth, and receives the downlink data on the PRBs identified by the numbers of the PRBs to which the determined VRBs have the numbers mapped, and specifically, blind detection may be performed on the PRBs, and the blind detection method may refer to the blind detection of the PDCCH in the existing LTE system.

Generally, a plurality of types of Information are transmitted on a Downlink channel such as PDCCH, taking PDCCH as an example, and 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 allocations: PDSCH allocations), power control information, and the like.

The terminal 302 usually does not know the size of a physical resource (CCE) occupied by the current PDCCH or the specific location of information sent to itself. But the terminal 302 knows what information it is currently expecting, such as: the information expected by the terminal 302 in Idle state is paging scheduling indication (paging SI); after initiating the random access procedure, the information expected by the terminal 302 is a random access channel Response (RACH Response); when there is uplink data waiting for transmission, terminal 302 expects uplink grant information and the like.

For different expected information, the UE uses a corresponding Radio Network Temporary Identity (RNTI) (for example, for the random access channel response, the UE uses the random access-RNTI: RA-RNTI) to perform Cyclic Redundancy Check (CRC) with the CCE information, if the CRC Check is successful, the terminal 302 determines that the information is sent to itself, and further determines a corresponding DCI format and a corresponding modulation mode, thereby solving the DCI.

Optionally, before the base station 301 writes the determined numbers of the dedicated VRBs into the interleaver line by line in sequence, the RB interval value N is determined according to the system bandwidth of the current cell_gapAnd sending the determined N to the terminal with limited radio frequency bandwidth in the current cell before downlink data transmission is carried out to the terminal with limited radio frequency bandwidth in the current cell_gapThe information of (1). Such as: the base station 301 may indicate N by 1bit information in a Physical Broadcast CHannel (PBCH)_gapIs taken as N_gap1Or N_gap2。

Terminal 302 receives the N_gapInformation of (2), determining N_gap(ii) a According to the determined N_gapAnd determining the PRB number obtained by mapping the special VRB number by the interleaver, and further receiving the downlink data.

Alternatively, the base station 301 and the terminal 302 perform Downlink data transmission through a PDCCH or a Physical Downlink Shared CHannel (PDSCH).

Alternative one is introduced above, in which the VRB may be mapped based on the DVRB manner, and allocated to the terminal with limited radio frequency bandwidth for use. In the second alternative, the VRB may be mapped based on the LVRB manner and allocated to the terminal with limited radio frequency bandwidth for use.

(alternative II)

In alternative two, the base station 301 and the terminal 302 are respectively configured to:

a base station 301 configured to determine K groups to which dedicated VRBs used for downlink data transmission to a set number of terminals with limited radio frequency bandwidth belong in a current cell; for each of the K packets, the base station 301 performs downlink data transmission to a terminal with a limited radio frequency bandwidth in the current cell on a PRB corresponding to the PRB having the same number as the VRB in the packet;

a terminal 302, configured to determine K groups to which dedicated VRBs used by the base station 301 for downlink data transmission to a terminal with a limited radio frequency bandwidth in a current cell belong; receiving downlink data transmission performed by the base station on the PRB corresponding to the PRB with the same number as the VRB in each of the K groups;

in a transmission time interval TTI, a VRB used by a base station for transmitting downlink data to a terminal with limited radio frequency bandwidth in a current cell belongs to one of K groups, and K is a positive integer;

wherein, M is_{group_UE}For determining the difference between the maximum value and the minimum value of the VRB number in each of the K packets, respectively, and determining the maximum value among the respective differences, such as: i is a positive integer, Num_{VRB_max}(i) Is the maximum value of VRB numbers in the ith packet, Num_{VRB_min}(i) The minimum value of VRB numbers in the ith packet.

In the following description, the radio frequency bandwidth-limited terminals in the set number are all radio frequency bandwidth-limited terminals currently in communication with the base station in the cell; the following description will be given by taking as an example that the bandwidths of all terminals with limited radio frequency bandwidths are the same. Before performing downlink data transmission to the terminal with limited radio frequency bandwidth in the current cell, the base station 301 may further send group identification information of K packets to the terminal with limited radio frequency bandwidth in the current cell; after receiving the group identifier, the terminal 302 determines the number of the VRB included in each of the K groups according to the group identifier, and receives downlink data transmission on the PRB corresponding to the PRB number that is the same as the determined number of the VRB.

Since the number of PRBs is the same as the number of VRBs, for example: mapping is performed based on the LVRB mode, so that VRBs in one of the K packets are allocated to a terminal with limited radio frequency bandwidth, and satisfying the above formula can ensure that the bandwidth occupied by PRBs used by a terminal with limited radio frequency bandwidth is smaller than the radio frequency bandwidth of the terminal with limited radio frequency bandwidth in one TTI.

An alternative implementation of the K packets can be seen in example four below.

[ EXAMPLE I ]

Examples of the inventionIn one, the system bandwidth of the current cell is 50 RBs, N_gap＝N_gap1And reusing the interleaver defined by the existing 3GPP protocol, and storing all VRB numbers which can be used for DVRB allocation in the interleaver.

A terminal with a limited radio frequency bandwidth receives downlink data using PRBs corresponding to VRBs, using VRBs with M rows and N columns (excluding NULL) in the interleaver as dedicated VRBs.

The M lines can be continuous or discontinuous, and the bandwidth occupied by the difference value VRB between the maximum line number and the minimum line number in the M lines does not exceed the radio frequency bandwidth of the terminal with limited radio frequency bandwidth; n is not greater than the number of columns of the existing interleaver, the column numbers of the N columns may be consecutive or non-consecutive, and M VRBs of each column are allocated to a radio frequency bandwidth-limited terminal as a VRB resource group, such as: M2M terminal.

Taking the interleaver shown in fig. 4 as an example, the first 4 rows of the interleaver have all 4 columns of VRBs as dedicated VRBs, and the VRBs are numbered as: 0-15, divided into: { (0,4,8, 12); (1,5,9, 13); (2,6,10, 14); (3,7,11,15) } four VRB resource groups, wherein each VRB resource group corresponds to one group of continuous PRB resources, namely 4 groups of PRB resources are numbered { (0,1,2,3) respectively; (12,13,14, 15); (27,28,29, 30); (39,40,41,42)}.

When the base station 501 allocates a VRB to the terminal 502, one of the VRBs may be allocated, and the bandwidth occupied by the PRB corresponding to the VRB does not exceed the radio frequency bandwidth of the terminal with the limited radio frequency bandwidth.

Taking the interleaver shown in fig. 5 as an example, the last 4 rows of the interleaver have all 4 columns of VRBs as dedicated VRBs, and these VRBs are numbered as: 32-45, comprising: { (32,36,40, 44); (33,37, 41); (34,38,42, 45); (35,39,43) } four groups of VRB resources, each group of VRB resources corresponding to a group of consecutive PRB resources, i.e. 4 groups of PRB resource numbers are { (8,9,10,11), respectively; (20,21, 22); (35,36,37, 38); (35,39,43)}.

[ EXAMPLE two ]

In example two, the system bandwidth of the current cell is 50 RBs, N_gap＝N_gap2And reusing the interleaver defined by the existing 3GPP protocol, and storing all VRB numbers which can be used for DVRB allocation in the interleaver.

And showExample I, N_gap＝N_gap1In contrast, all available VRBs need to be grouped, with each group of VRBs interleaved with an existing interleaver.

The M lines can be continuous or discontinuous, and the bandwidth occupied by the difference value VRB between the maximum line number and the minimum line number in the M lines does not exceed the radio frequency bandwidth of the terminal with limited radio frequency bandwidth. N may be larger than the number of columns of the existing interleaver, such as: corresponding to multiple groups of interleaver VRB resources, the column numbers of the corresponding N columns can be continuous or discontinuous, and M VRBs of each column are used as a VRB resource group and allocated to a radio-frequency-limited terminal.

Taking the interleaver shown in fig. 6 as an example, all VRBs in the first 3 rows of the interleaver are divided into two groups for individual interleaving, all VRBs in 8 columns are used as dedicated VRBs, and the VRBs are numbered 0 to 11 and 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 groups of VRB resources, each group of VRB resources corresponding to a group of consecutive PRB resources, i.e. 8 groups of PRB resource numbers are { (0,1,2) respectively; (6,7, 8); (9,10, 11); (15,16, 17); (18,19, 20); (24,25, 26); (27,28, 29); (33,34,35)}.

[ EXAMPLE III ]

In example three, the base station 301 transmits the numbered information of the dedicated VRB through PBCH.

There are many alternative implementations of the numbering information of the dedicated VRB, which are exemplified below, and various variations and modifications made by those skilled in the art according to the following examples should be considered to be within the scope of the present invention.

In a first mode

The information of the number of the dedicated VRB includes: information indicating the number of rows occupying the interleaver and the number of columns occupied by the number of dedicated VRBs.

Such as: indicated by means of bitmap. In the existing interleaver, there are X rows and N columns, wherein M rows and N columns are used as dedicated VRBs. Assuming that X is 6, Y is 4, M is 4, and N is 4, then bitmap1 is 101101, and bitmap2 is 1111, the 1 st, 3 rd, 4 th, and 6 th rows in all 4 columns in the interleaver are designated as dedicated VRBs.

Mode two

The second approach applies to the case where dedicated VRBs occupy consecutive M rows.

Such as: the information of the number of the dedicated VRB includes: information for indicating the value of M, and according to the value range of M, the number of bits used by the information may be set, for example: 3 bit; and information indicating whether the number of the dedicated VRB occupies the first M lines or the last M lines of the interleaver, which may use 1bit, when the dedicated VRB occupies the first M lines or the last M lines of the interleaver.

In the second approach, information indicating that the number of dedicated VRBs occupies the number of columns of the interleaver is also required, such as: bitmap2 in one of the manners described above.

Mode III

In mode three, the number of dedicated VRBs occupies the number of all VRBs except for empty NULL elements in the interleaver.

Optionally, the information of the number of the dedicated VRB in the third mode includes: information indicating that the number of the dedicated VRB occupies the numbers of all VRBs except for the NULL element in the interleaver.

[ EXAMPLE IV ]

TABLE 2 System Bandwidth of Current cell 50RB, N_gap＝N_gap1

TABLE 3 System Bandwidth of Current cell 50RB, N_gap＝N_gap2

TABLE 4 System Bandwidth of Current cell 50RB, N_gap＝N_gap1

TABLE 5 System Bandwidth of Current cell 50RB, N_gap＝N_gap1

The wireless communication system provided by the embodiment of the invention is described above, and two alternatives and four examples are described. Based on the same inventive concept, embodiments of the present invention further provide a terminal, a base station, and a data transmission method, and as the principle of solving the problem is similar to that of the wireless communication system provided in the embodiments of the present invention, the implementation of the wireless communication system can be referred to, and repeated details are not repeated.

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:

a processing module 701, configured to determine a number of dedicated VRBs used for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell; writing the determined serial numbers of the special VRBs into the interleaver line by line in sequence, reading the serial numbers of the special VRBs column by column from the interleaver, and mapping the serial numbers to the serial numbers of the PRBs;

a sending module 702, configured to perform downlink data transmission on the PRBs corresponding to the mapped PRBs numbers to the terminals with limited radio frequency bandwidth in the set number in the current cell;

wherein, the number of the special VRB satisfies: after the VRB is put into the interleaver line by line in sequence, M lines and N columns of the interleaver are occupied, wherein in a transmission time interval TTI, VRB used by a base station for downlink transmission to a terminal with limited radio frequency bandwidth in a current cell is positioned in 1 column of the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth in the set number of terminals with limited radio frequency bandwidth in the current cell, M_{row_UE}Difference between maximum and minimum of the number of the line occupied by the number of the dedicated VRB after insertion in the interleaver, M_{row_UE}M, N is a positive integer.

Optionally, the sending module 702 is further configured to:

before downlink transmission is performed to the set number of terminals whose radio frequency bandwidth is limited in the current cell, information of the number of the dedicated VRBs is transmitted to the set number of terminals whose radio frequency bandwidth is limited in the current cell.

Optionally, the information of the number of the dedicated VRB includes: information indicating the number of rows occupying the interleaver and the number of columns occupied by the number of dedicated VRBs.

Optionally, when the number of the dedicated VRB occupies the first M rows of the interleaver, the information of the number of the dedicated VRB includes:

information indicating a value of M; and

information indicating that the number of dedicated VRBs occupies the first M rows of the interleaver.

Optionally, when the number of the dedicated VRB occupies the last M rows of the interleaver, the information of the number of the dedicated VRB includes:

information indicating a value of M; and

information indicating that the number of dedicated VRBs occupies the last M rows of the interleaver.

Optionally, the information of the number of the dedicated VRB further includes:

information indicating the number of columns of the interleaver occupied by the number of the dedicated VRB.

Optionally, when the number of the dedicated VRB occupies the numbers of all VRBs except the empty NULL element in the interleaver, the information of the number of the dedicated VRB includes:

information indicating that the number of the dedicated VRB occupies the numbers of all VRBs except for the NULL element in the interleaver.

Optionally, the processing module 701 is further configured to:

Optionally, the sending module 702 is further configured to:

transmitting information of the RB interval value to the set number of radio frequency bandwidth limited terminals in the current cell before performing downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell.

Alternatively, the radio frequency bandwidth limited terminal is an M2M terminal.

Optionally, the sending module 702 is specifically configured to:

For other optional implementation manners of the base station, reference may be made to the base station 301 in the alternative of the wireless communication system provided in the embodiment of the present invention, and repeated descriptions are omitted.

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:

a processor 801 configured to determine a number of dedicated VRBs used for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell; writing the determined serial numbers of the special VRB into the interleaver line by line in sequence, reading the serial numbers from the interleaver line by line, and mapping the serial numbers to the serial numbers of the PRB;

a transmitter 802, configured to perform downlink data transmission on the PRBs corresponding to the mapped PRBs numbers to the terminals with limited radio frequency bandwidths in the current cell;

For alternative implementations of the processor 801, reference may be made to the processing module 701; other alternative implementations of transmitter 802 may refer to sending module 702 described above; in addition, the base station may refer to the base station 301 in the first alternative of the wireless communication system, and repeated description is omitted.

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:

a processing module 901, configured to determine K groups to which dedicated VRBs used for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell belong, where, in a transmission time interval TTI, a VRB used for downlink data transmission to a terminal with limited radio frequency bandwidth in the current cell belongs to one of the K groups, and K is a positive integer;

a sending module 902, configured to perform downlink data transmission on PRBs corresponding to the same number of PRBs as the VRBs in each of the K packets to the set number of terminals with limited radio frequency bandwidth in the current cell;

wherein M is_{group_UE}The radio frequency bandwidth occupied by the resource blocks RB is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of terminals with limited radio frequency bandwidth in the current cell; m_{group_UE}The difference between the maximum value and the minimum value of the VRB numbers in each of the K groups is determined respectively, and the maximum value is determined in each difference.

Optionally, the sending module 902 is further configured to:

transmitting group identification information of K packets to the set number of terminals with limited radio frequency bandwidth in the current cell before performing downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell.

Optionally, the sending module 902 is specifically configured to:

For other alternatives of the base station, reference may be made to the base station 301 in the second alternative of the foregoing wireless communication system, and repeated descriptions are omitted.

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:

a processor 1001, configured to determine K groups to which dedicated VRBs used for downlink data transmission to a set number of radio frequency bandwidth-limited terminals in a current cell belong, where a VRB used for downlink data transmission to a radio frequency bandwidth-limited terminal in the current cell belongs to one of the K groups in one TTI, and K is a positive integer;

a transmitter 1002 configured to perform downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell, for each of the K packets, on the PRB corresponding to the PRB having the same number as the VRB in the packet;

In addition, other optional implementations of the processor 1001 may refer to the foregoing processing module 901, other optional implementations of the transmitter 1002 may refer to the foregoing sending module 902, and in addition, other optional implementations of the base station may refer to the base station 301 in the second alternative of the wireless communication system provided in the embodiment of the present invention, and repeated details are not repeated.

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:

a processing module 1101, configured to determine the number of a dedicated VRB, where the dedicated VRB is a VRB used by a base station to perform downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell where the terminal is located; determining the PRB number obtained after the number of the special VRB is mapped by the interleaver;

a receiving module 1102, configured to receive, on a PRB corresponding to the mapped PRB number obtained by the processing module 1101, downlink data transmission performed by the base station in the current cell;

wherein, the number of the special VRB satisfies: after the VRB is put into the interleaver line by line in sequence, M lines and N columns of the interleaver are occupied, wherein in a transmission time interval TTI, a terminal with limited radio frequency bandwidth in the current cell receives 1 column of VRB used by downlink transmission in the N columns; and M_{row_UE}The radio frequency bandwidth occupied by the resource block RB is not more than the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth in the set number of terminals with limited radio frequency bandwidth in the current cellFrequency bandwidth, wherein M_{row_UE}The difference value between the maximum value and the minimum value of the serial numbers of the VRBs used for receiving the downlink data transmission sent by the base station to the set number of terminals with limited radio frequency bandwidth in the current cell after being put into the interleaver, M_{row_UE}M, N is a positive integer.

Optionally, the processing module 1101 is specifically configured to: the receiving module 1102 receives the information of the number of the dedicated VRB transmitted by the base station, and determines the number of the dedicated VRB according to the received information of the number of the dedicated VRB.

information indicating a value of M; and

Optionally, the receiving module 1102 is further configured to: receiving information of an RB interval value transmitted by a base station before receiving downlink transmission performed by the base station on a PRB corresponding to the mapped PRB number obtained by the processing module 1101;

the processing module 1101 is further configured to: according to the RB interval value received by the receiving module 1102, the number of the PRB obtained by mapping the number of the dedicated VRB by the interleaver is determined.

Optionally, the radio frequency bandwidth limited terminal is a machine-to-machine M2M terminal.

Optionally, the receiving module 1102 is specifically configured to:

and receiving downlink data transmission performed by the base station through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).

Other alternative implementations of the terminal may refer to the terminal 302 in the alternative of the wireless communication system provided in the embodiment of the present invention, and repeated descriptions are omitted here.

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:

a processor 1201, configured to obtain information of a number of a dedicated VRB, where the dedicated VRB is a VRB used by a base station to perform downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell where the terminal is located; determining the PRB number obtained after the number of the special VRB is mapped by the interleaver;

a receiver 1202, configured to receive, on a PRB corresponding to the mapped PRB number obtained by the processor 1201, downlink data transmission performed by the base station in the current cell;

wherein, the number of the special VRB satisfies: after the VRB is put into the interleaver line by line in sequence, M lines and N columns of the interleaver are occupied, wherein in a transmission time interval TTI, a terminal with limited radio frequency bandwidth in the current cell receives 1 column of VRB used by downlink transmission in the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth in the set number of terminals with limited radio frequency bandwidth in the current cell, wherein M is_{row_UE}The difference value between the maximum value and the minimum value of the serial numbers of the VRBs used for the base station to transmit downlink data to the set number of terminals with limited radio frequency bandwidth in the current cell and the serial numbers of the lines occupied by the serial numbers of the VRBs after being put into the interleaver, M_{row_UE}、MAnd N is a positive integer.

In addition, other optional implementations of the processor 1201 may refer to the foregoing processing module 1101, and other optional implementations of the receiver 1202 may refer to the foregoing receiving module 1102, and in addition, other optional implementations of the terminal may refer to the terminal 302 in the next optional implementation in the wireless communication system provided in the embodiment of the present invention, and repeated descriptions are omitted.

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:

a processing module 1301, configured to determine K groups to which dedicated VRBs used by a base station for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell where the terminal is located belong; in a transmission time interval TTI, a VRB used by a base station for transmitting downlink data to a terminal with limited radio frequency bandwidth in a current cell belongs to one of K groups, and K is a positive integer;

a receiving module 1302, configured to receive downlink data transmission performed by a base station on a PRB corresponding to a PRB with the same number as a VRB in each of the K groups;

M_{group_UE}the difference between the maximum value and the minimum value of the VRB numbers in each of the K groups is determined respectively, and the maximum value is determined in each difference.

Optionally, the processing module 1301 is specifically configured to:

receiving, by the receiving module 1302, group identification information of K groups sent by a base station; and determining K groups according to the group identification information received by the receiving module.

Optionally, the receiving module 1302 is specifically configured to:

For other optional implementation manners of the base station, reference may be made to the terminal 302 in the second alternative of the wireless communication system provided in the embodiment of the present invention, and repeated descriptions are omitted.

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:

a processor 1401, configured to determine K groups to which dedicated VRBs used by a base station for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell where the terminal is located belong; in a transmission time interval TTI, a VRB used by a base station for transmitting downlink data to a terminal with limited radio frequency bandwidth in a current cell belongs to one of K groups, and K is a positive integer;

a receiver 1402 configured to receive downlink data transmission by a base station on a PRB corresponding to a PRB having the same number as the VRB in each of the K packets;

In addition, other optional implementations of the processor 1401 may refer to the terminal 302 in the alternative second of the wireless communication system provided in the embodiment of the present invention, and repeated descriptions are omitted here.

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 steps of:

s1501: the base station determines the serial number of special VRBs used for transmitting downlink data to a set number of terminals with limited radio frequency bandwidth in a current cell;

s1502: the base station writes the determined serial numbers of the special VRBs into the interleaver line by line in sequence, reads the serial numbers of the special VRBs column by column from the interleaver, and maps the serial numbers to the serial numbers of the PRBs;

s1503: the base station performs downlink data transmission to the terminals with limited radio frequency bandwidth in the set number in the current cell on the PRB corresponding to the mapped PRB number;

Optionally, before the base station performs downlink transmission to the set number of terminals with limited radio frequency bandwidth in the current cell, the method further includes:

the base station transmits information of the number of the dedicated VRBs to the set number of terminals with limited radio frequency bandwidth in the current cell.

information indicating a value of M; and

Optionally, before the base station writes the determined numbers of the dedicated VRBs into the interleaver line by line in sequence, the method further includes:

Optionally, before the base station performs downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell, the method further includes:

the base station transmits information of the RB interval value to the set number of terminals in the current cell whose radio frequency bandwidth is limited.

Optionally, the performing, by the base station, downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell includes:

and the base station transmits downlink data to the set number of terminals with limited radio frequency bandwidth in the current cell through a physical downlink control channel PDCCH or a physical downlink shared channel PDSCH.

For other optional implementation manners of the method, reference may be made to the processing of the base station 301 in the alternative of the wireless communication system provided in the embodiment of the present invention, and repeated descriptions are omitted here.

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 steps of:

s1601: the base station determines K groups to which special VRBs used for downlink data transmission to a set number of radio frequency bandwidth-limited terminals in a current cell belong, wherein the VRBs used for downlink data transmission to one radio frequency bandwidth-limited terminal in the current cell belong to one of the K groups in one Transmission Time Interval (TTI), and K is a positive integer;

s1602: for each of the K groups, 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 PRB with the same number as the VRB in the group;

wherein M is_{group_UE}The difference between the maximum value and the minimum value of the VRB numbers in each of the K groups is determined respectively, and the maximum value is determined in each difference.

and the base station transmits the group identification information of the K groups to the set number of terminals with limited radio frequency bandwidth in the current cell.

For other optional implementation manners of the method, reference may be made to the processing of the base station 301 in the alternative scheme two in the wireless communication system provided in the embodiment of the present invention, and repeated descriptions are omitted here.

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 steps of:

s1701: the method comprises the steps that a terminal with limited radio frequency bandwidth in a current cell determines the number of a special VRB, and the special VRB is used for a base station to transmit downlink data to a set number of terminals with limited radio frequency bandwidth in the current cell;

s1702: the terminal determines the number of a PRB obtained after the number of the special VRB is mapped by the interleaver, and receives downlink data transmission in the current cell by the base station on the PRB corresponding to the obtained mapped PRB number;

wherein, the number of the special VRB satisfies: after the VRB is put into the interleaver line by line in sequence, M lines and N columns of the interleaver are occupied, wherein in a transmission time interval TTI, a terminal with limited radio frequency bandwidth in the current cell receives 1 column of VRB used by downlink transmission in the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth in the set number of terminals with limited radio frequency bandwidth in the current cell, wherein M is_{row_UE}The difference value between the maximum value and the minimum value of the serial numbers of the VRBs used for receiving the downlink data transmission sent by the base station for the set number of terminals with limited radio frequency bandwidth in the current cell, M_{row_UE}M, N is a positive integer.

Optionally, the terminal determines the number of the dedicated VRB, including:

the terminal receives the serial number information of the special VRB sent by the base station; and determines the number of the dedicated VRB based on the received information.

information indicating a value of M; and

Optionally, before the terminal determines the number of the PRB obtained after the number of the dedicated VRB is mapped by the interleaver, and receives downlink transmission performed by the base station on the PRB corresponding to the obtained mapped number of the PRB, the method further includes:

the terminal receives the RB interval value information sent by the base station;

and the terminal determines the PRB number obtained by mapping the number of the special VRB by the interleaver according to the received RB interval value.

Optionally, the receiving, by the terminal, downlink data transmission performed by the base station includes:

the terminal receives downlink data transmission performed by a base station through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).

Other optional implementation manners of the method may refer to the processing of the terminal 302 under the alternative in the wireless communication system provided in the embodiment of the present invention, and repeated details are not repeated.

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 steps of:

s1801: the terminal with limited radio frequency bandwidth in the current cell determines K groups to which special VRBs (virtual router blocks) used by a base station for transmitting downlink data to a set number of terminals with limited radio frequency bandwidth in the current cell belong; in a transmission time interval TTI, a VRB used by a base station for transmitting downlink data to a terminal with limited radio frequency bandwidth in a current cell belongs to one of K groups, and K is a positive integer;

s1802: the terminal receives downlink data transmission by the base station on a PRB corresponding to the PRB with the same number as the VRB in each of the K groups;

Optionally, the terminal determines K packets, including:

the terminal receives group identification information of K groups sent by a base station;

the terminal determines K groups according to the received group identification information.

Other optional implementation manners of the method may refer to the processing of the terminal 302 in the alternative scheme two in the wireless communication system provided by the embodiment of the present invention, and repeated details are not repeated.

alternative scheme one, because in one TTIThe base station carries out downlink transmission to a terminal with limited radio frequency bandwidth, and the VRB used by the base station occupies 1 column; and the difference M between the maximum value and the minimum value of the numbers of the rows of the interleaver occupied by the dedicated VRBs_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of a terminal with limited radio frequency bandwidth in the current cell, the interleaver performs mapping in a traveling listing mode, and after mapping of the interleaver, a column in the interleaver is mapped to PRBs with continuous numbers, so that VRBs occupied by one terminal are mapped to PRBs with continuous numbers not more than M_{row_UE}On one PRB, regardless of M_{row_UE}Whether the PRBs are numbered consecutively, M_{row_UE}The bandwidth occupied by the PRB does not exceed the radio frequency bandwidth of the terminal, so that the terminal with limited radio frequency bandwidth is ensured to normally receive downlink data.

In the second alternative, the dedicated VRB used by the base station for downlink data transmission to the terminal with limited radio frequency bandwidth in the current cell belongs to K groups, each group is used for downlink data transmission of one terminal, and M is the above M in the K groups_{group_UE}The radio frequency bandwidth occupied by each resource block RB is not larger than the radio frequency bandwidth of a terminal with limited radio frequency bandwidth in a current cell, and when a base station transmits downlink data to the terminal, the base station uses the PRB corresponding to the PRB with the same number as the VRB in the group corresponding to the terminal, so that the bandwidth occupied by the downlink data transmission to the terminal is not larger than the radio frequency bandwidth of the terminal in one TTI, and the normal reception of the downlink data of the terminal with limited radio frequency bandwidth is ensured.

As will be appreciated by one skilled in the art, embodiments of the present invention may 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 an embodiment combining software and hardware aspects. Furthermore, the present invention may 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, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

A base station, comprising:

the processing module is used for determining the serial number of the special virtual resource block VRB used for downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell; writing the determined serial numbers of the special VRBs into an interleaver line by line in sequence, reading the serial numbers of the special VRBs from the interleaver line by line, and mapping the serial numbers to the serial numbers of Physical Resource Blocks (PRBs);

a sending module, configured to perform downlink data transmission on the PRBs corresponding to the mapped PRBs numbers to the terminals with limited radio frequency bandwidth in the set number in the current cell;

wherein the number of the dedicated VRB satisfies: after the VRB is put into an interleaver in sequence and row by row, M rows and N columns of the interleaver are occupied, wherein in a transmission time interval TTI, VRB used by the base station for downlink transmission to a terminal with limited radio frequency bandwidth in the current cell is positioned in 1 column of the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth among the terminals with the limited radio frequency bandwidth of the set number in the current cell, M_{row_UE}For the maximum of the number of the line occupied by the number of the dedicated VRB after being put into the interleaver

Difference of value from minimum value, M_{row_UE}M, N is a positive integer.
The base station of claim 1, wherein the transmitting module is further configured to:

transmitting information of the number of the dedicated VRBs to the set number of terminals with limited radio frequency bandwidth in the current cell before downlink transmission to the set number of terminals with limited radio frequency bandwidth in the current cell.
The base station of claim 2,

the information of the number of the dedicated VRB includes: information indicating a number of rows occupying the interleaver and a number of columns occupied by the number of the dedicated VRB.
The base station of claim 2, wherein the information of the number of the dedicated VRB when the number of the dedicated VRB occupies the first M rows of the interleaver comprises:

information indicating a value of the M; and

information indicating that the number of the dedicated VRB occupies the first M rows of the interleaver.
The base station of claim 2, wherein when the number of the dedicated VRB occupies the last M rows of the interleaver, the information of the number of the dedicated VRB comprises:

information indicating a value of the M; and

information indicating that the number of the dedicated VRB occupies the last M rows of the interleaver.
The base station according to claim 4 or 5, wherein the information of the number of dedicated VRBs further comprises:

information indicating that the number of the dedicated VRB occupies the number of columns of the interleaver.
The base station of claim 2, wherein the information of the number of dedicated VRBs comprises:

information indicating that the number of the dedicated VRB occupies the numbers of all VRBs in the interleaver except the NULL element.
The base station of any of claims 1 to 7, wherein the processing module is further configured to:

and before the determined serial numbers of the special VRBs are written into the interleaver line by line in sequence, determining an RB interval value according to the system bandwidth of the current cell.
The base station of claim 8, wherein the transmitting module is further configured to:

transmitting information of the RB interval value to the set number of radio frequency bandwidth-limited terminals in the current cell before downlink data transmission to the set number of radio frequency bandwidth-limited terminals in the current cell.
The base station of any of claims 1 to 9, wherein the radio frequency bandwidth limited terminal is a machine M2M terminal of a machine.
The base station of any one of claims 1 to 10, wherein the sending module is specifically configured to:

and performing downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).
A base station, comprising:

a processing module, configured to determine K groups to which dedicated virtual resource blocks VRBs used for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell belong, where, in a transmission time interval TTI, a VRB used for downlink data transmission to a terminal with limited radio frequency bandwidth in the current cell belongs to one of the K groups, and K is a positive integer;

a transmission module, configured to perform downlink data transmission on PRBs corresponding to physical resource blocks PRB with the same number as that of VRBs in each of the K groups to the set number of terminals with limited radio frequency bandwidth in the current cell;

wherein M is_{group_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the minimum radio frequency bandwidth of the set number of radio frequency bandwidth-limited terminals in the current cellThe radio frequency bandwidth of the end; m_{group_UE}The difference value between the maximum value and the minimum value of the VRB numbers in each of the K groups is respectively determined, and the maximum value is determined in each difference value.
The base station of claim 12, wherein the transmitting module is further configured to:

transmitting the group identification information of the K packets to the set number of terminals with limited radio frequency bandwidth in the current cell before performing downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell.
The base station of claim 12 or 13, wherein the radio frequency bandwidth limited terminal is a machine-to-machine M2M terminal.
The base station of any one of claims 12 to 14, wherein the sending module is specifically configured to:

and performing downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).
A radio frequency bandwidth limited terminal, comprising:

the processing module is used for determining the serial number of a special Virtual Resource Block (VRB), wherein the special VRB is used for downlink data transmission of a set number of terminals with limited radio frequency bandwidth in a current cell where the terminal is located by a base station; determining the number of a physical resource block PRB obtained after the number of the special VRB is mapped by an interleaver;

a receiving module, configured to receive, on the PRB corresponding to the mapped PRB number obtained by the processing module, downlink data transmission performed by the base station in the current cell;

wherein the number of the dedicated VRB satisfies: after the serial line-by-line input is put into the interleaver, M of the interleaver is occupiedA row and N columns, wherein, in a transmission time interval TTI, a VRB used by a terminal with limited radio frequency bandwidth in the current cell for receiving downlink transmission is located in 1 column of the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth in the set number of terminals with limited radio frequency bandwidth in the current cell, wherein M is the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth_{row_UE}A difference value between a maximum value and a minimum value of numbers of rows occupied by numbers of VRBs used for receiving downlink data transmission sent by the base station for the set number of terminals with limited radio frequency bandwidth in the current cell after the VRBs are placed in the interleaver, M_{row_UE}M, N is a positive integer.
The terminal of claim 16, wherein the processing module is specifically configured to:

receiving, by the receiving module, information of the number of the dedicated VRB sent by the base station; and are

And determining the number of the special VRB according to the received information of the number of the special VRB.
The terminal of claim 17,

the information of the number of the dedicated VRB includes: information indicating a number of rows occupying the interleaver and a number of columns occupied by the number of the dedicated VRB.
The terminal of claim 17, wherein the information of the number of the dedicated VRB when the number of the dedicated VRB occupies the first M rows of the interleaver comprises:

information indicating a value of the M; and

information indicating that the number of the dedicated VRB occupies the first M rows of the interleaver.
The terminal of claim 17, wherein when the number of the dedicated VRB occupies the last M rows of the interleaver, the information of the number of the dedicated VRB comprises:

information indicating a value of the M; and

information indicating that the number of the dedicated VRB occupies the last M rows of the interleaver.
The terminal according to claim 19 or 20, wherein the information of the number of dedicated VRBs further comprises:

information indicating that the number of the dedicated VRB occupies the number of columns of the interleaver.
The terminal of claim 17, wherein the information of the number at the dedicated VRB comprises:

information indicating that the number of the dedicated VRB occupies the numbers of all VRBs in the interleaver except the NULL element.
The terminal according to any of claims 16 to 22,

the receiving module is further configured to: receiving information of an RB interval value sent by the base station before receiving downlink transmission performed by the base station on a PRB corresponding to the mapped PRB number obtained by the processing module;

the processing module is further configured to: and determining the PRB number obtained after the serial number of the special VRB is mapped by the interleaver according to the RB interval value received by the receiving module.
The terminal of any of claims 16 to 23, wherein the radio frequency bandwidth limited terminal is a machine-to-machine M2M terminal.
The terminal according to any one of claims 16 to 24, wherein the receiving module is specifically configured to:

and receiving downlink data transmission of the base station through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).
A radio frequency bandwidth limited terminal, comprising:

the processing module is used for determining K groups of special virtual resource blocks VRBs (virtual resource blocks) which are used by a base station for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell where the terminal is located; in a transmission time interval TTI, a VRB used by the base station for downlink data transmission to a terminal with limited radio frequency bandwidth in the current cell belongs to one of the K groups, 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 physical resource block PRB same in number as a VRB in each of the K groups;

wherein M is_{group_UE}The radio frequency bandwidth occupied by the resource blocks RB is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of terminals with limited radio frequency bandwidth in the current cell;

M_{group_UE}the difference value between the maximum value and the minimum value of the VRB numbers in each of the K groups is respectively determined, and the maximum value is determined in each difference value.
The terminal of claim 26, wherein the processing module is specifically configured to:

receiving, by the receiving module, group identification information of the K groups sent by the base station; and determining the K groups according to the group identification information received by the receiving module.
The terminal of claim 26 or 27, wherein the radio frequency bandwidth limited terminal is a machine-to-machine M2M terminal.
The terminal of any one of claims 26 to 28, wherein the receiving module is specifically configured to:

and receiving downlink data transmission of the base station through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).
A method of data transmission, comprising:

a base station determines the serial number of a special virtual resource block VRB used for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in a current cell;

the base station writes the determined serial numbers of the special VRBs into an interleaver line by line in sequence, reads the serial numbers of the special VRBs from the interleaver line by line and then maps the serial numbers to the serial numbers of Physical Resource Blocks (PRBs);

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 mapped PRB number;

wherein the number of the dedicated VRB satisfies: after the VRB is put into an interleaver in sequence and row by row, M rows and N columns of the interleaver are occupied, wherein in a transmission time interval TTI, VRB used by the base station for downlink transmission to a terminal with limited radio frequency bandwidth in the current cell is positioned in 1 column of the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the current cell

Radio frequency bandwidth, M, of a terminal having the smallest radio frequency bandwidth among the set number of terminals having limited radio frequency bandwidth_{row_UE}Is the difference between the maximum and minimum of the number of the line occupied by the number of the dedicated VRB after being put into the interleaver, M_{row_UE}M, N is a positive integer.
The method as claimed in claim 30, wherein before the base station performs downlink transmission to the terminals with limited radio frequency bandwidth in the current cell, the method further comprises:

and the base station transmits the information of the number of the dedicated VRB to the set number of terminals with limited radio frequency bandwidth in the current cell.
The method of claim 31,

the information of the number of the dedicated VRB includes: information indicating a number of rows occupying the interleaver and a number of columns occupied by the number of the dedicated VRB.
The method of claim 31, wherein the information of the number of the dedicated VRB when the number of the dedicated VRB occupies the first M rows of the interleaver comprises:

information indicating a value of the M; and

information indicating that the number of the dedicated VRB occupies the first M rows of the interleaver.
The method of claim 31, wherein when the number of the dedicated VRB occupies the last M rows of the interleaver, the information of the number of the dedicated VRB comprises:

information indicating a value of the M; and

information indicating that the number of the dedicated VRB occupies the last M rows of the interleaver.
The method of claim 33 or 34, wherein the information of the number of dedicated VRBs further comprises:

information indicating that the number of the dedicated VRB occupies the number of columns of the interleaver.
The method of claim 31, wherein the information of the number of dedicated VRBs comprises:

information indicating that the number of the dedicated VRB occupies the numbers of all VRBs in the interleaver except the NULL element.
The method according to any of claims 30-36, further comprising, before the base station writing the determined numbers of the dedicated VRBs in sequence row by row into the interleaver:

and the base station determines an RB interval value according to the system bandwidth of the current cell.
The method as claimed in claim 37, wherein before the base station performs downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell, the method further comprises:

and the base station transmits the information of the RB interval value to the set number of terminals with limited radio frequency bandwidth in the current cell.
The method of any of claims 30 to 38, wherein the radio frequency bandwidth limited terminal is a machine-to-machine M2M terminal.
The method as claimed in any one of claims 30 to 39, wherein the base station performs downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell, and comprises:

and the base station transmits downlink data to the set number of terminals with limited radio frequency bandwidth in the current cell through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).
A method of data transmission, comprising:

a base station determines K groups to which special Virtual Resource Blocks (VRBs) used for downlink data transmission to a set number of radio frequency bandwidth-limited terminals in a current cell belong, wherein the VRBs used for downlink data transmission to one radio frequency bandwidth-limited terminal in the current cell belong to one of the K groups in a Transmission Time Interval (TTI), and K is a positive integer;

for each of the K groups, the base station performs downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell on a physical resource block PRB corresponding to the same number as the PRB of the VRB in the group;

wherein M is_{group_UE}One resource block RB occupies a radio frequency bandwidth not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of terminals with limited radio frequency bandwidths in the current cell;

wherein M is_{group_UE}The difference value between the maximum value and the minimum value of the VRB numbers in each of the K groups is respectively determined, and the maximum value is determined in each difference value.
The method as claimed in claim 41, wherein before the base station performs downlink data transmission to the set number of radio frequency bandwidth limited terminals in the current cell, the method further comprises:

and the base station sends the group identification information of the K groups to the set number of terminals with limited radio frequency bandwidth in the current cell.
The method of claim 41 or 42, wherein the radio frequency bandwidth limited terminal is a machine-to-machine M2M terminal.
The method as claimed in any one of claims 41 to 43, wherein the base station performs downlink data transmission to the set number of terminals with limited radio frequency bandwidth in the current cell, and comprises:

and the base station transmits downlink data to the set number of terminals with limited radio frequency bandwidth in the current cell through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).
A method of data transmission, comprising:

determining the number of a special Virtual Resource Block (VRB) by a terminal with limited radio frequency bandwidth in a current cell, wherein the special VRB is a VRB used by a base station for transmitting downlink data to a set number of terminals with limited radio frequency bandwidth in the current cell;

the terminal determines the number of the PRB obtained after the number of the special VRB is mapped by the interleaver, and receives the downlink data transmission of the base station in the current cell on the PRB corresponding to the obtained mapped PRB number;

wherein the number of the dedicated VRB satisfies: after the VRBs are put into the interleaver in sequence and row by row, M rows and N columns of the interleaver are occupied, wherein in a transmission time interval TTI, a terminal with limited radio frequency bandwidth in the current cell receives 1 column of VRBs used for downlink transmission, and the VRBs are located in the N columns; and M_{row_UE}The radio frequency bandwidth occupied by each resource block RB is not more than the radio frequency bandwidth of the terminal with the minimum radio frequency bandwidth in the set number of terminals with limited radio frequency bandwidth in the current cell, wherein M is_{row_UE}A difference value between a maximum value and a minimum value of numbers of rows occupied by numbers of VRBs used for receiving downlink data transmission sent by the base station for the set number of terminals with limited radio frequency bandwidth in the current cell after the VRBs are placed in the interleaver, M_{row_UE}M, N is a positive integer.
The method of claim 45, wherein the terminal determining the number of dedicated VRBs comprises:

the terminal receives the information of the serial number of the special VRB sent by the base station;

and the terminal determines the number of the special VRB according to the received information of the number of the special VRB.
The method of claim 46,

the information of the number of the dedicated VRB includes: information indicating a number of rows occupying the interleaver and a number of columns occupied by the number of the dedicated VRB.
The method of claim 46, wherein the information of the number of the dedicated VRB when occupying the first M rows of the interleaver comprises:

information indicating a value of the M; and

information indicating that the number of the dedicated VRB occupies the first M rows of the interleaver.
The method of claim 46, wherein when the number of the dedicated VRB occupies the last M rows of the interleaver, the information of the number of the dedicated VRB comprises:

information indicating a value of the M; and

information indicating that the number of the dedicated VRB occupies the last M rows of the interleaver.
The method of claim 48 or 49, wherein the information of the number of dedicated VRBs further comprises:

information indicating that the number of the dedicated VRB occupies the number of columns of the interleaver.
The method of claim 46, wherein the information of the number of dedicated VRBs comprises:

information indicating that the number of the dedicated VRB occupies the numbers of all VRBs in the interleaver except the NULL element.
The method according to any of claims 45-51, wherein before the terminal receives the downlink transmission by the base station, further comprising:

the terminal receives the information of the RB interval value sent by the base station;

and the terminal determines the PRB number obtained after the serial number of the special VRB is mapped by the interleaver according to the received RB interval value.
The method of any of claims 45 to 52, wherein the radio frequency bandwidth limited terminal is a machine-to-machine M2M terminal.
The method according to any of claims 45 to 53, wherein the receiving, by the terminal, the downlink data transmission by the base station comprises:

and the terminal receives downlink data transmission of the base station through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).
A method of data transmission, comprising:

the method comprises the steps that a terminal with limited radio frequency bandwidth in a current cell determines K groups of special Virtual Resource Blocks (VRBs) which are used by a base station for downlink data transmission to a set number of terminals with limited radio frequency bandwidth in the current cell; in a transmission time interval TTI, a VRB used by the base station for downlink data transmission to a terminal with limited radio frequency bandwidth in the current cell belongs to one of the K groups, and K is a positive integer;

the terminal receives downlink data transmission performed by the base station on a Physical Resource Block (PRB) corresponding to the PRB with the same number as the VRB in each of the K groups;

wherein M is_{group_UE}The radio frequency bandwidth occupied by the resource blocks RB is not greater than the radio frequency bandwidth of the terminal with the smallest radio frequency bandwidth among the set number of terminals with limited radio frequency bandwidth in the current cell;

M_{group_UE}the difference value between the maximum value and the minimum value of the VRB numbers in each of the K groups is respectively determined, and the maximum value is determined in each difference value.
The method of claim 55, wherein the terminal determining the K packets comprises: the terminal receives the group identification information of the K groups sent by the base station;

and the terminal determines the K groups according to the received group identification information.
The method of claim 55 or 56, wherein the radio frequency bandwidth limited terminal is a machine-to-machine M2M terminal.
The method according to any of claims 55 to 57, wherein the receiving, by the terminal, the downlink data transmission by the base station comprises:

and the terminal receives downlink data transmission of the base station through a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH).