CN107710848A

CN107710848A - Data transmission method, apparatus and system

Info

Publication number: CN107710848A
Application number: CN201580081388.5A
Authority: CN
Inventors: 李超君; 马莎; 邵家枫
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-08-12
Filing date: 2015-08-12
Publication date: 2018-02-16
Also published as: WO2017024565A1

Abstract

The present invention relates to wireless communication technology field, more particularly to data transmission method, apparatus and system, to provide the scheduling scheme for being directed to Transmission Time Interval TTI and being less than the data transfer of 1 subframe lengths or TTI less than 1ms.In a kind of base station provided in an embodiment of the present invention, processing module, for determining scheduling of resource granularity；According to scheduling of resource granularity, determine terminal device carry out data transmission used in short TTI data transmission resources, short TTI data transmission resources are less than the length of 1 subframe in time domain or less than 1ms；Transceiver module, for sending Downlink Control Information DCI to terminal device, short TTI data transmission resources are indicated, and carry out data transmission with terminal device using short TTI data transmission resources.In the embodiment of the present invention, the DCI that base station is sent indicates short TTI data transmission resources to terminal device, realizes the scheduling for data transfers of the TTI less than 1 subframe lengths or less than 1ms.

Description

Data transmission method, apparatus and system

Technical field

The present invention relates to wireless communication technology field more particularly to a kind of data transmission methods, apparatus and system.

Background technique

In wireless communication system, time delay (latency) be influence user experience an important factor for one of.The new business of emergence, such as the relevant business of car networking also propose increasingly higher demands to time delay.In order to reduce time delay, with long term evolution (Long Term Evolution, LTE) for system, Transmission Time Interval (Transmission Time Interval, TTI) 1 symbol (Symbol) length can be shorten to between 1ms from 1 millisecond of length (ms) of 1 current subframe, i.e. TTI is less than 1ms.

Still by taking LTE system as an example, the data transmission between base station and terminal device is carried out based on scheduling, and there is presently no the data transmission scheduling schemes for being less than 1ms less than 1 subframe lengths or TTI for TTI.

Summary of the invention

In view of this, the embodiment of the present invention provides a kind of data transmission method, apparatus and system, to provide a kind of scheduling scheme that the data for TTI less than 1 subframe lengths or TTI less than 1ms are transmitted.

In a first aspect, the embodiment of the present invention provides a kind of base station, comprising:

Processing module, for determining scheduling of resource granularity；And according to the scheduling of resource granularity, determine terminal device carry out data transmission used in short transmission time interval TTI data transmission resources, the short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain；

Transceiver module, for sending Downlink Control Information DCI to the terminal device, the DCI is used to indicate the short TTI data transmission resources；

The transceiver module is also used for the short TTI data transmission resources and carries out data transmission with the terminal device.

With reference to first aspect, in the first possible implementation, the processing module is specifically used for: The scheduling of resource granularity is determined using one of following manner:

The scheduling of resource granularity is determined according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI；

The scheduling of resource granularity is determined according to system bandwidth；

Available bandwidth, which is transmitted, according to short TTI data determines the scheduling of resource granularity；

The scheduling of resource granularity is determined according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and system bandwidth；And

The scheduling of resource granularity is determined according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.

In the possible implementation of with reference to first aspect the first, in the second possible implementation, if the processing module determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI,

The CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the scheduling of resource granularity is bigger.

The possible implementation of with reference to first aspect the first, in the third possible implementation, the scheduling of resource granularity includes time-domain resource scheduling granularity, the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the processing module determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI,

System bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

If system bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.

In the possible implementation of with reference to first aspect the first, in the fourth possible implementation, the scheduling of resource granularity includes time-domain resource scheduling granularity, and the time-domain resource scheduling granularity is the base The scheduling terminal device of standing carries out the minimum time-domain resource allocation unit when transmission of short TTI data, including at least one symbol；

If the processing module determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth,

The short TTI data transmission available bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

If the short TTI data transmission available bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.

With reference to first aspect or first aspect the first into the 4th kind of possible implementation, in a fifth possible implementation,

The scheduling of resource granularity includes: time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

The processing module is specifically used for:

Granularity is dispatched according to the time-domain resource, determines that the symbol that the short TTI data transmission resources occupy in the time domain, the distinct symbols in the symbol occupied in the time domain occupy the frequency domain resource of same band on frequency domain；

The same band refers to: identical system bandwidth, identical short TTI data transmission available bandwidth or identical specific bandwidth；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that short TTI data transmission resources can occupy.

With reference to first aspect or first aspect the first into the 4th kind of possible implementation, in a sixth possible implementation,

The scheduling of resource granularity includes: frequency domain resource scheduling granularity, and the frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；

The processing module is specifically used for:

According to the frequency domain resource scheduling granularity, determine that the short TTI data transmission resources account on frequency domain Resource, the short TTI data transmission resources occupy N number of symbol in the time domain, and the N is positive integer, and when cyclic prefix CP is long CP, the N is not more than 6, and when CP is common CP, the N is not more than 7.

With reference to first aspect or first aspect the first into the 4th kind of possible implementation, in the 7th kind of possible implementation,

The scheduling of resource granularity includes: frequency domain resource scheduling granularity and time-domain resource scheduling granularity；The frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；The time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

The processing module is specifically used for:

Granularity is dispatched according to the time-domain resource, determines the symbol that the short TTI data transmission resources occupy in the time domain；And

According to the frequency domain resource scheduling granularity, the resource that the short TTI data transmission resources occupy on frequency domain is determined.

The 5th kind of possible implementation with reference to first aspect, in the 8th kind of possible implementation,

The processing module is specifically used for: determining that the data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, and the X is positive integer, and X is the integral multiple that the time-domain resource dispatches granularity；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: the Length Indication information for being used to indicate the X, and the Length Indication information is that the processing module is generated according to time-domain resource scheduling granularity.

The 5th kind of possible implementation with reference to first aspect, in the 9th kind of possible implementation,

The processing module is specifically used for: determining that the short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting, and the symbolic number of occupancy is that the time-domain resource dispatches the whole of granularity Several times；

The DCI includes: to be used to indicate the information of several symbols relative to the relative position of the reference symbol, and the information of the relative position is that the processing module dispatches granularity according to the time-domain resource and the relative position generates.

The 5th kind of possible implementation with reference to first aspect, in the tenth kind of possible implementation,

The processing module is specifically used for: determining that the short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting, wherein, several the described symbols occupied are continuous, and the number of several symbols occupied is identical as symbol numbers included by the time-domain resource granularity；

The information bit of the short TTI data transmission resources is used to indicate in the DCI as sky.

The 6th kind of possible implementation with reference to first aspect, in a kind of the tenth possible implementation,

The resource for determining that the short TTI data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity；And

Determine that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol, the reference symbol is k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: the information for being used to indicate the frequency domain initial position of the short TTI data transmission resources, and the information of the frequency domain initial position is that the processing module is generated according to the frequency domain resource scheduling granularity.

The 7th kind of possible implementation with reference to first aspect, in the 12nd kind of possible implementation,

Determine that the short TTI data transmission resources occupy continuous symbol, and the symbol occupied in the time domain Several symbolic numbers for including with time-domain resource scheduling granularity are equal；

Determine that the primary sign that the data transmission resources occupy in the time domain is reference symbol；

The 7th kind of possible implementation with reference to first aspect, in the 13rd kind of possible implementation,

The processing module is specifically used for:

Determining that the short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, and the X is positive integer；The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

Determine that the short TTI data transmission resources are occupied on frequency domain with the resource for the nominated bandwidth that frequency domain initial position is starting；

The DCI includes: the bandwidth information of the start position information and the nominated bandwidth that are used to indicate the frequency domain initial position, and is used to indicate the Length Indication information of the X；Information, the bandwidth information of the frequency domain initial position are that the processing module is generated according to the frequency domain resource scheduling granularity, and the Length Indication information is that the processing module is generated according to time-domain resource scheduling granularity.

With reference to first aspect, or the first of first aspect is any one of to the 13rd kind of possible implementation, in the 14th kind of possible implementation, the processing module is also used to: before determining the scheduling of resource granularity, determination meets at least one of following condition:

The delay requirement of the currently used business of the terminal device is less than the delay threshold of setting；

System bandwidth is greater than the bandwidth threshold of setting；And

Resource availability is greater than the resource availability threshold value of setting in system bandwidth.

With reference to first aspect or first aspect the first any one of to the 14th kind of possible implementation, in the 15th kind of possible implementation, the transceiver module is also used to:

Before sending DCI to the terminal device, notify that the available short TTI data transmission resources of the terminal device, the available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or the data transmit the time-domain resource that can be occupied by high-level signaling；

With reference to first aspect or first aspect the first any one of to the 15th kind of possible implementation, in the 16th kind of possible implementation, the transceiver module is specifically used for:

The DCI is sent on the short TTI data transmission resources of DCI instruction.

The 16th kind of possible implementation with reference to first aspect, in the 17th kind of possible implementation, the transceiver module is specifically used for:

When sending the DCI, first sign-on mapping of the short TTI data transmission resources indicated from the DCI is further continued for being mapped to next symbol when taking first symbol.

Second aspect, the embodiment of the present invention provide a kind of terminal device, comprising:

Processing module, for determining scheduling of resource granularity；

Transceiver module, for receiving the Downlink Control Information DCI of base station transmission, the DCI be used to indicate the terminal device carry out data transmission used in short TTI data transmission resources, the short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain；

According to the scheduling of resource granularity and the DCI, determine that the terminal device carries out the data and transmits the used short TTI data transmission resources；And

The data transmission is carried out using the short TTI data transmission resources and the base station.

In conjunction with second aspect, in the first possible implementation, the processing module is specifically used for: the scheduling of resource granularity is determined using one of following manner:

The resource tune is determined according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI Spend granularity；

In conjunction with the first possible implementation of second aspect, in the second possible implementation, if the processing module determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI,

In conjunction with the first possible implementation of second aspect, in the third possible implementation, the scheduling of resource granularity includes time-domain resource scheduling granularity, the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

In conjunction with the first possible implementation of second aspect, in the fourth possible implementation, the scheduling of resource granularity includes time-domain resource scheduling granularity, the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If short TTI data transmission available bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.

In conjunction with any one of the first of second aspect or second aspect to the 4th kind of possible implementation, in a fifth possible implementation,

The distinct symbols that the short TTI data transmission resources occupy in the time domain occupy the frequency domain resource of same band on frequency domain；

In conjunction with any one of the first of second aspect or second aspect to the 4th kind of possible implementation, in a sixth possible implementation,

The short TTI data transmission resources occupy N number of symbol in the time domain, and the N is positive integer, and when cyclic prefix CP is long CP, the N is not more than 6, and when CP is common CP, the N is not more than 7.

In conjunction with any one of the first of second aspect or second aspect to the 4th kind of possible implementation, in the 7th kind of possible implementation,

The scheduling of resource granularity includes: frequency domain resource scheduling granularity and time-domain resource scheduling granularity；

The frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；

The time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station.

In conjunction with the 5th kind of possible implementation of second aspect, in the 8th kind of possible implementation,

The DCI includes: the Length Indication information for being used to indicate the symbol numbers X that the short TTI data transmission resources occupy in the time domain；

The terminal device is according to the scheduling of resource granularity and the DCI, determine the short TTI data transmission resources, it include: the terminal device according to the Length Indication information and time-domain resource scheduling granularity, determining that the short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, and the X is positive integer；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer.

In conjunction with the 5th kind of possible implementation of second aspect, in the 9th kind of possible implementation,

The DCI includes: to be used to indicate the short TTI data transmission resources to be occupied in the time domain with the information for relative position of several symbols relative to the reference symbol that reference symbol is starting；

The processing module is specifically used for: information and the time-domain resource depending on that relative position dispatches granularity, determines that the short TTI data transmission resources are occupied in the time domain with the reference symbol as several symbols described in starting.

In conjunction with the 5th kind of possible implementation of second aspect, in the tenth kind of possible implementation,

The information bit of the short TTI data transmission resources is used to indicate in the DCI as sky；

The processing module is specifically used for:

Determining that the short TTI data transmission resources are occupied in the time domain with reference symbol is several originated Symbol, several described symbols of occupancy are that the number of several symbols that are continuous and occupying is identical as symbol numbers included by the time-domain resource granularity；

In conjunction with the 6th kind of possible implementation of second aspect, in a kind of the tenth possible implementation,

The DCI includes: the start position information for being used to indicate the frequency domain initial position of the short TTI data transmission resources；

The processing module is specifically used for:

According to the frequency domain resource scheduling granularity and the start position information, the frequency domain initial position of the short TTI data transmission resources is determined, and the resource for determining that the short TTI data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity；And

Determine that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol；The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer.

In conjunction with the 7th kind of possible implementation of second aspect, in the 12nd kind of possible implementation, the DCI includes: the start position information for being used to indicate the frequency domain initial position of the short TTI data transmission resources；

The processing module is specifically used for:

Determine that the short TTI data transmission resources occupy continuous symbol in the time domain, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes；

Determine that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol；The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

According to the start position information, determine the short TTI data transmission resources occupied on frequency domain with The frequency domain initial position is the resource of starting, then the resource occupied is big as the frequency domain resource scheduling granularity.

In conjunction with the 7th kind of possible implementation of second aspect, in the 13rd kind of possible implementation,

The DCI includes: the bandwidth information of the start position information and the short TTI data transmission resources that are used to indicate the frequency domain initial position of the short TTI data transmission resources；And it is used to indicate the Length Indication information for the symbolic number X that the short TTI data transmission resources occupy in the time domain, the X is positive integer；

The processing module is specifically used for:

Granularity and the Length Indication information are dispatched according to the time-domain resource, determining that the short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, the reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

According to the frequency domain resource scheduling granularity, the start position information and the bandwidth information, determine that the short TTI data transmission resources occupy resource indicated by the bandwidth information that the frequency domain initial position starts on frequency domain.

In conjunction with any one of the first of second aspect or second aspect to the 13rd kind of possible implementation, in the 14th kind of possible implementation,

The transceiver module is also used to:

Before receiving the DCI that the base station is sent, the available short TTI data transmission resources of the terminal device that the base station is notified by high-level signaling are received, the available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or short TTI data transmit the time-domain resource that can be occupied；

The third aspect, the embodiment of the present invention provide a kind of data transmission method, comprising:

Base station determines scheduling of resource granularity；

The base station determines that terminal device carries out data transmission used short transmission time interval TTI data transmission resources, the short TTI data transmission resources are in the time domain less than 1 according to the scheduling of resource granularity The length of a subframe is less than 1ms；

The base station sends Downlink Control Information DCI to the terminal device, and the DCI is used to indicate the short TTI data transmission resources；

The base station is carried out data transmission using the short TTI data transmission resources with the terminal device.

In conjunction with the third aspect, in the first possible implementation, the base station determines the scheduling of resource granularity using one of following manner:

The base station determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI；

The base station determines the scheduling of resource granularity according to system bandwidth；

Available bandwidth is transmitted according to short TTI data and determines the scheduling of resource granularity in the base station；

The base station determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI；And

The base station determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth；

In the first possible implementation in conjunction with the third aspect, in the second possible implementation, if the base station determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI,

In conjunction with the first possible implementation of the third aspect, in the third possible implementation, the scheduling of resource granularity includes time-domain resource scheduling granularity, the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the base station determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI,

In the first possible implementation in conjunction with the third aspect, in the fourth possible implementation, the scheduling of resource granularity includes time-domain resource scheduling granularity, the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the base station determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth,

In conjunction with the first of the third aspect or the third aspect into the 4th kind of possible implementation, in a fifth possible implementation,

The base station determines the short TTI data transmission resources according to the scheduling of resource granularity, comprising:

Granularity is dispatched according to the time-domain resource in the base station, determines that the symbol that the short TTI data transmission resources occupy in the time domain, the distinct symbols in the symbol occupied in the time domain occupy the frequency domain resource of same band on frequency domain；

In conjunction with the first of the third aspect or the third aspect into the 4th kind of possible implementation, in a sixth possible implementation,

The base station is according to the frequency domain resource scheduling granularity, determine the resource that the short TTI data transmission resources occupy on frequency domain, the short TTI data transmission resources occupy N number of symbol in the time domain, the N is positive integer, when cyclic prefix CP is long CP, the N is not more than 6, and when CP is common CP, the N is not more than 7.

In conjunction with the first of the third aspect or the third aspect into the 4th kind of possible implementation, in the 7th kind of possible implementation,

Granularity is dispatched according to the time-domain resource in the base station, determines the symbol that the short TTI data transmission resources occupy in the time domain；And

The base station determines the resource that the short TTI data transmission resources occupy on frequency domain according to the frequency domain resource scheduling granularity.

In conjunction with the 5th kind of possible implementation of the third aspect, in the 8th kind of possible implementation,

The base station granularity is dispatched according to the time-domain resource, determine the symbol that the short TTI data transmission resources occupy in the time domain, include: the base station determine the data transmission resources occupy in the time domain with reference symbol be starting continuous X symbol, the X is positive integer, and X is the integral multiple that the time-domain resource dispatches granularity；

The reference symbol are as follows: shared by k-th of the symbol or the DCI after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI K-th of symbol after last symbol, k are positive integer；

The DCI includes: the Length Indication information for being used to indicate the X, and the Length Indication information is that the base station is generated according to time-domain resource scheduling granularity.

In conjunction with the 5th kind of possible implementation of the third aspect, in the 9th kind of possible implementation,

The base station granularity is dispatched according to the time-domain resource, determine the symbol that the short TTI data transmission resources occupy in the time domain, it include: that determine that the short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting for the base station, the symbolic number of occupancy is the integral multiple that the time-domain resource dispatches granularity；

The DCI includes: to be used to indicate the information of several symbols relative to the relative position of the reference symbol, and the information of the relative position is that granularity is dispatched according to the time-domain resource in the base station and the relative position generates.

In conjunction with the 5th kind of possible implementation of the third aspect, in the tenth kind of possible implementation,

The base station granularity is dispatched according to the time-domain resource, determine the symbol that the short TTI data transmission resources occupy in the time domain, include: the base station determine the short TTI data transmission resources occupy in the time domain with reference symbol be starting several symbols, wherein, several the described symbols occupied are continuous, and the number of several symbols occupied is identical as symbol numbers included by the time-domain resource granularity；

In conjunction with the 6th kind of possible implementation of the third aspect, in a kind of the tenth possible implementation,

The base station determines the resource that the short TTI data transmission resources occupy on frequency domain according to the frequency domain resource scheduling granularity, comprising: the base station determines the short TTI data transmission resources on frequency domain The resource of occupancy is big as the frequency domain resource scheduling granularity；

The base station is according to the scheduling of resource granularity, determine the data transmission resources, further include: the base station determines that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol, the reference symbol is k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: the information for being used to indicate the frequency domain initial position of the short TTI data transmission resources, and the information of the frequency domain initial position is that the base station is generated according to the frequency domain resource scheduling granularity.

In conjunction with the 7th kind of possible implementation of the third aspect, in the 12nd kind of possible implementation,

The base station granularity is dispatched according to the time-domain resource, determine the symbol that the short TTI data transmission resources occupy in the time domain, it include: that the base station determines that the short TTI data transmission resources occupy continuous symbol in the time domain, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes；

The base station is according to the frequency domain resource scheduling granularity, determine the resource that the short TTI data transmission resources occupy on frequency domain, comprising: the resource that the base station determines that the short TTI data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity；

The base station determines the short TTI data transmission resources according to the scheduling of resource granularity, further includes: the base station determines that the primary sign that the data transmission resources occupy in the time domain is reference symbol；

In conjunction with the 7th kind of possible implementation of the third aspect, in the 13rd kind of possible implementation,

The base station granularity is dispatched according to the time-domain resource, determine the symbol that the short TTI data transmission resources occupy in the time domain, include: the base station determine the short TTI data transmission resources occupy in the time domain with reference symbol be starting continuous X symbol, the X be positive integer；

The base station is according to the frequency domain resource scheduling granularity, determine the resource that the short TTI data transmission resources occupy on frequency domain, comprising: the base station determines that the short TTI data transmission resources are occupied on frequency domain with the resource for the nominated bandwidth that frequency domain initial position is starting；

The DCI includes: the bandwidth information of the start position information and the nominated bandwidth that are used to indicate the frequency domain initial position, and is used to indicate the Length Indication information of the X；Information, the bandwidth information of the frequency domain initial position are that the base station is generated according to the frequency domain resource scheduling granularity, and the Length Indication information is that the base station is generated according to time-domain resource scheduling granularity.

In conjunction with any one of the first of the third aspect or the third aspect to the 13rd kind of possible implementation, in the 14th kind of possible implementation,

Before the base station determines the scheduling of resource granularity, further includes: the base station determination meets at least one of following condition:

System bandwidth is greater than the bandwidth threshold of setting；And

In conjunction with any one of the first of the third aspect or the third aspect to the 14th kind of possible implementation, in the 15th kind of possible implementation,

Before the base station sends DCI to the terminal device, further includes:

The base station notifies that the available short TTI data transmission resources of the terminal device, the available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or the data transmit the time-domain resource that can be occupied by high-level signaling；

In conjunction with any one of the first of the third aspect or the third aspect to the 15th kind of possible implementation, in the 16th kind of possible implementation,

The base station sends the DCI, comprising:

The base station sends the DCI on the short TTI data transmission resources that the DCI is indicated.

In conjunction with the 16th kind of possible implementation of the third aspect, in the 17th kind of possible implementation,

The base station sends the DCI on the short TTI data transmission resources that the DCI is indicated, comprising:

When sending the DCI, first sign-on mapping of the short TTI data transmission resources indicated from the DCI is further continued for being mapped to next symbol when taking first symbol for the base station.

Fourth aspect, the embodiment of the present invention provide a kind of transmission transmission method, comprising:

Terminal device determines scheduling of resource granularity；

The terminal device receives the Downlink Control Information DCI that base station is sent, the DCI be used to indicate the terminal device carry out data transmission used in short TTI data transmission resources, the short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain；

The terminal device determines that carrying out the data transmits the used short TTI data transmission resources according to the scheduling of resource granularity and the DCI；

The terminal device carries out the data transmission using the short TTI data transmission resources and the base station.

In conjunction with fourth aspect, in the first possible implementation, the terminal device determines the scheduling of resource granularity using one of following manner:

The terminal device determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI；

The terminal device determines the scheduling of resource granularity according to system bandwidth；

The terminal device transmits available bandwidth according to short TTI data and determines the scheduling of resource granularity；

The terminal device determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI；And

The terminal device determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth；

In conjunction with the first possible implementation of fourth aspect, in the second possible implementation, if the terminal device determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI,

In conjunction with the first possible implementation of fourth aspect, in the third possible implementation, the scheduling of resource granularity includes time-domain resource scheduling granularity, the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the terminal device determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI,

In conjunction with the first possible implementation of fourth aspect, in the fourth possible implementation, the scheduling of resource granularity includes time-domain resource scheduling granularity, the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the terminal device determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth,

Short TTI data transmission available bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

In conjunction with any one of the first of fourth aspect or fourth aspect to the 4th kind of possible implementation, in a fifth possible implementation,

In conjunction with any one of the first of fourth aspect or fourth aspect to the 4th kind of possible implementation, in a sixth possible implementation,

In conjunction with any one of the first of fourth aspect or fourth aspect to the 4th kind of possible implementation, in the 7th kind of possible implementation,

In conjunction with the 5th kind of possible implementation of fourth aspect, in the 8th kind of possible implementation,

In conjunction with the 5th kind of possible implementation of fourth aspect, in the 9th kind of possible implementation,

The terminal device is according to the scheduling of resource granularity and the DCI, determine the short TTI data transmission resources, include: the information and time-domain resource scheduling granularity of the terminal device depending on that relative position, determines that the short TTI data transmission resources are occupied in the time domain with the reference symbol as several symbols described in starting.

In conjunction with the 5th kind of possible implementation of fourth aspect, in the tenth kind of possible implementation,

The terminal device determines the short TTI data transmission resources according to the scheduling of resource granularity and the DCI, comprising:

It take reference symbol as several symbols of starting that the terminal device, which determines that the short TTI data transmission resources occupy in the time domain, several described symbols of occupancy are that the number of several symbols that are continuous and occupying is identical as symbol numbers included by the time-domain resource granularity；

In conjunction with the 6th kind of possible implementation of fourth aspect, in a kind of the tenth possible implementation,

The terminal device is according to the frequency domain resource scheduling granularity and the start position information, determine the frequency domain initial position of the short TTI data transmission resources, and the resource for determining that the short TTI data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity；And

The terminal device determines that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol；The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer.

In conjunction with the 7th kind of possible implementation of fourth aspect, in the 12nd kind of possible implementation, the DCI includes: the start position information for being used to indicate the frequency domain initial position of the short TTI data transmission resources；

The terminal device determines that the short TTI data transmit used data transmission resources according to the scheduling of resource granularity and the DCI, comprising:

The terminal device determines that the short TTI data transmission resources occupy continuous symbol in the time domain, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes；

The terminal device determines that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol；The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

The terminal device is according to the start position information, and determining that the short TTI data transmission resources occupy on frequency domain take the frequency domain initial position as the resource of starting, then the resource occupied is big as the frequency domain resource scheduling granularity.

In conjunction with the 7th kind of possible implementation of fourth aspect, in the 13rd kind of possible implementation,

The terminal device dispatches granularity and the Length Indication information according to the time-domain resource, determining that the short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, the reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

The terminal device determines that the short TTI data transmission resources occupy resource indicated by the bandwidth information that the frequency domain initial position starts on frequency domain according to the frequency domain resource scheduling granularity, the start position information and the bandwidth information.

In conjunction with any one of the first of fourth aspect or fourth aspect to the 13rd kind of possible implementation, in the 14th kind of possible implementation,

Before receiving the DCI that the base station is sent, further includes:

The available short TTI data transmission resources of the terminal device that the base station is notified by high-level signaling are received, the available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or short TTI data transmit the time-domain resource that can be occupied；

5th aspect, the embodiment of the present invention provide a kind of wireless communication system, comprising: base station and terminal device,

The base station, for determining scheduling of resource granularity, according to the scheduling of resource granularity, determine that the terminal device carries out data transmission used short transmission time interval TTI data transmission resources, the short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain, and Downlink Control Information DCI is sent to the terminal device, the DCI is used to indicate the short TTI data transmission resources；

The terminal device receives the DCI that the base station is sent, according to the determining scheduling of resource granularity and the DCI, determines the short TTI data transmission resources used in carrying out data transmission for determining the scheduling of resource granularity.

In the embodiment of the present invention, the DCI that base station is sent indicates the data transmission realized less than 1 subframe or less than the short TTI data transmission resources of 1ms for TTI less than 1 subframe lengths or less than 1ms to terminal device.

Detailed description of the invention

Fig. 1 is the structural schematic diagram for the wireless communication system that the embodiment of the present invention one provides；

Fig. 2 is the flow chart of data transmission in the embodiment of the present invention one；

Fig. 3~Fig. 5 is the schematic diagram of data transmission resources scheme in the embodiment of the present invention one；

Fig. 6 is the structural schematic diagram of base station provided by Embodiment 2 of the present invention；

Fig. 7 is a kind of structural schematic diagram of the base station provided by Embodiment 2 of the present invention under optional implementation；

Fig. 8 is structural schematic diagram of the base station provided by Embodiment 2 of the present invention under another optional implementation；

Fig. 9 is the structural schematic diagram for the terminal device that the embodiment of the present invention three provides；

Figure 10 is a kind of structural schematic diagram of the terminal device that provides of the embodiment of the present invention three under optional implementation；

Figure 11 is structural schematic diagram of the terminal device that provides of the embodiment of the present invention three under alternatively possible implementation；

Figure 12 is the flow chart for the first data transmission method that the embodiment of the present invention four provides；

Figure 13 is the flow chart for second of data transmission method that the embodiment of the present invention five provides.

Specific embodiment

In embodiments of the present invention, base station determines that terminal device carries out data biography according to scheduling of resource granularity Short TTI data transmission resources used in defeated, base station send Downlink Control Information (Downlink Control Information, DCI) to terminal device, and DCI is used to indicate the short TTI data transmission resources.Terminal device receives the DCI that base station is sent, and according to scheduling of resource granularity and DCI, determines short TTI data transmission resources used in carrying out data transmission；Wherein, short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain.

Wherein, the DCI that base station is sent indicates the scheduling that the transmission of the data for TTI less than 1 subframe lengths or less than 1ms is realized less than 1 subframe or less than the short TTI data transmission resources of 1ms to terminal device.

For the ease of the understanding to the embodiment of the present invention, introduce first below the present embodiments relate to basic conception.

In order to facilitate understanding, it is introduced by taking LTE system as an example, but this does not imply that the embodiment of the present invention is only applicable to LTE system, actually, it is any to use scheme provided in an embodiment of the present invention by dispatching the wireless communication system carried out data transmission, to provide the TTI scheduling of the data transmission less than 1 subframe or less than 1ms.

One, data transmission and scheduling

In LTE system, using Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH downlink data) is transmitted, upstream data is transmitted using Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH).

Terminal device UE in LTE system needs to know that base station is allocated to the scheduling information (scheduling information) of UE, such as time-frequency resource allocating, modulation coding scheme etc. before receiving downlink data or sending upstream data.In addition, base station is also required to relevant power control commands (the power control commands) information of notice UE uplink.These scheduling informations and power control commands information belong to DCI.DCI is carried by Physical Downlink Control Channel (Physical Downlink Control CHannel, PDCCH).

The PDCCH that the embodiment of the present invention is mentioned can be the PDCCH of the definition of version (Rel) -8, enhancing Physical Downlink Control Channel (the enhanced Physical Downlink Control CHannnel that Rel-11 is defined, ePDCCH), and or the following evolution PDCCH, as long as can be used to send DCI to terminal device.

Two, (Control Channel Element, CCE) aggregation level

In LTE system, the physical downlink control channel PDCCH for sending scheduling information is polymerized by L CCE, and L is positive integer, referred to as aggregation level (aggregation level).Such as: the PDCCH defined for Rel-8, L can be 1,2,4,8；For another example: 1,2,4,8,16,32 can be for ePDCCH defined in Rel-11, L.

Three, frame structure

In general, being by radio frames (Radio Frame) in wireless communication system, on the time come what is be identified.Such as: in LTE system, each radio frames are made of the subframe (subframe) of 10 1ms length, and each subframe includes 2 time slots (slot).

For general cyclic prefix (Normal cyclic prefix, normal CP), each slot is made of 7 symbols；For long CP (Extended cyclic prefix, extended CP), each slot is made of 6 symbols.Wherein, uplink symbol is known as single-carrier frequency division multiple access (Single Carrier-Frequency Division Multiple Access, SC-FDMA) symbol, downlink symbol is known as orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol.It should be noted that if subsequent technology introduces the uplink multi-address mode of orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), uplink symbol is referred to as OFDM symbol.In the embodiment of the present invention, uplink symbol and downlink symbol are all referred to as symbol.

Four, scheduling of resource granularity

Scheduling of resource granularity is minimum resource allocation unit when base station schedules terminals equipment carries out data transmission.For LTE system, scheduling of resource granularity can include: frequency domain resource scheduling granularity and/or time-domain resource dispatch granularity.

Time-domain resource scheduling granularity is minimum time-domain resource allocation unit when base station schedules terminals equipment carries out the transmission of short TTI data, including at least one symbol；

Frequency domain resource scheduling granularity is minimum frequency domain resource allocation unit when base station schedules terminals equipment carries out the transmission of short TTI data, including at least one resource block (Resource Block, RB).

Such as: frequency domain resource scheduling granularity can be several RB, such as: 25 RB, 20 RB, 10 RB, 5 RB etc..

It can be several symbols that time-domain resource, which dispatches granularity, such as: 1 symbol, 2 symbols, 3 symbols, 4 symbols, 1 time slot etc..

In the embodiment of the present invention, data transmission resources include several scheduling of resource granularities.Since less than 1 subframe, time-domain resource dispatch length of the granularity less than 1 subframe to data transmission resources in the time domain.

By taking frequency domain as an example, it is assumed that data transmission resources occupy 10 RB on frequency domain, and the scheduling of resource granularity on frequency domain, i.e. frequency domain resource scheduling granularity are 2 RB, then data transmission resources include 5 frequency domain resource scheduling granularities.

For another example: still by taking frequency domain as an example, system bandwidth is 10 RB, and frequency domain resource scheduling granularity is 4 RB, if base station is that terminal device 102 distributes whole system bandwidth, most latter two RB is also allocated to the terminal device.

Five, short TTI data transmission

In the embodiment of the present invention, TTI is known as " short TTI data packet " less than 1 subframe or the data packet of 1ms, such as: when subframe lengths are 1ms, data packet of the TTI less than 1ms is known as " short TTI data packet ", such as: TTI=0.5ms.

Similarly, TTI is known as " short TTI data transmission " less than 1 subframe or the transmission of the data of 1ms, such as: when subframe lengths are 1ms, TTI is known as " short TTI data transmission " less than the transmission of the data of 1ms, such as: TTI is 2 symbol lengths.

It less than the length of 1 subframe or less than the data transmission resources of 1ms is short TTI data transmission resources in time domain.

Short TTI data are transmitted, the transfer resource of a dispatching distribution is in the time domain less than 1 subframe or the length of 1ms.

Six, resource allocation (Resource Allocation, RA) information

It include resource allocation RA information in DCI in LTE system.Corresponding transmitting uplink data, presently, there are 2 kinds of RA modes；Corresponding downlink data transmission, presently, there are 3 kinds of RA modes, the bit number of the corresponding RA information of different RA modes is different.

At present in LTE system, TTI 1ms, eNB send a DCI only in the TTI of 1ms to notify UE to receive or send the data packet (Packet data) of a 1ms TTI.But introducing short TTI After data packet, i.e. after data transmission of the introducing TTI less than 1ms, for example TTI is reduced to 1 symbol lengths between 0.5ms, and base station may need to send multiple DCI in 1ms to notify UE to receive or send multiple short TTI data packets.

Since DCI is carried by PDCCH, after introducing short TTI data packet, need in the more DCI of transmitted per unit time, the bit number for the RA information for needing to transmit in the unit time also can correspondingly increase, and cause the expense of RA information larger.

In the following, the embodiment of the present invention is described in detail in conjunction with attached drawing.Wireless communication system provided in an embodiment of the present invention is introduced first and then introduces base station provided in an embodiment of the present invention, terminal device, finally introduces method for scheduling resources transmitted provided in an embodiment of the present invention.

For the sake of describing to understand, following table lists various embodiments of the present invention and corresponding attached drawing.

Embodiment	Content	Attached drawing
Embodiment	Content	Attached drawing	Embodiment one	Wireless communication system	FIG. 1 to FIG. 5
Embodiment two	Base station	Fig. 6~Fig. 8	Embodiment one	Wireless communication system	FIG. 1 to FIG. 5
Embodiment two	Base station	Fig. 6~Fig. 8	Embodiment three	Terminal device	Fig. 9~Figure 11
Example IV	The first data transmission method	Figure 12	Embodiment three	Terminal device	Fig. 9~Figure 11
Example IV	The first data transmission method	Figure 12	Embodiment five	Second of data transmission method	Figure 13

[embodiment one]

As shown in Figure 1, the wireless communication system that embodiment one provides includes: base station 101 and terminal device 102, wherein

Base station 101, for determining that dispatch terminal equipment 102 carries out data transmission used data transmission resources, and send DCI to terminal device according to scheduling of resource granularity, DCI is used to indicate the data transmission resources, and is carried out data transmission using the data transmission resources and terminal device 102；

Terminal device 102, according to scheduling of resource granularity and DCI, determines that carrying out above-mentioned data transmits the used data transmission resources, and carry out data transmission using the data transmission resources and base station 101 for receiving the DCI of the transmission of base station 101；

Wherein, optionally, which less than the length of 1 subframe or is less than 1ms in the time domain, As short TTI data transmission resources, can effectively shorten data transmission delay, and the data between terminal device 102 and base station 101 are transmitted as short TTI data transmission at this time；Or, the data transmission resources are the data transmission resources that TTI is 1ms or 1 subframe, referred to as " Common data transmission resource ", the data transmission between terminal device 102 and base station 101 can be described as " Common data transmission " at this time, by scheduling of resource granularity, the flexible configuration of data transmission resources is realized.

Wherein, the TTI of the short TTI data transmission less than 1 subframe or is less than 1ms.

Wherein, if data are transmitted as short TTI data transmission, the short TTI data transmission resources as indicated by DCI can be realized the scheduling to TTI less than the data transmission of 1 subframe in the time domain less than the length of 1 subframe.Alternatively, the short TTI data transmission resources as indicated by DCI are less than 1ms in the time domain, the scheduling that the data to TTI less than 1ms are transmitted can be realized.

In subsequent each embodiment, in addition to specified otherwise, data transmission can be the transmission of short TTI data or Common data transmission, and corresponding, data transmission resources can be short TTI data transmission resources or Common data transmission resource.

Different wireless communication standards can be used in the wireless communication system that embodiment one provides, and the applicable wireless communication standard of embodiment one includes but is not limited to following various standards:

Global system for mobile communications (Global System of Mobile communication, GSM), CDMA (Code Division Multiple Access, CDMA) IS-95, CDMA (Code Division Multiple Access, CDMA) 2000, TD SDMA (Time Division-Synchronous Code Division Multiple Access, TD-SCDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), time division duplex-long term evolution (Time Division Duplexing-Long Term Evolution, TDD LTE), frequency division duplex-long term evolution (Frequency Division Duplexing-Long Term Evolution, FDD LTE), long term evolution-enhancing (Long Term Evolution-Advanced, LTE-advanced), personal handyphone system (Personal Handy-phone System, PHS), Wireless Fidelity as defined in 802.11 serial protocols (Wireless Fidelity, WiFi), short distance radio communication systems such as worldwide interoperability for microwave accesses (Worldwide Interoperability for Microwave Access, WiMAX), bluetooth (Blue Tooth) etc..

Wherein, terminal device 102 can be user equipment, including but not limited to: mobile phone, tablet computer, Personal digital assistant (Personal Digital Assistant, PDA), point-of-sale terminal equipment (Point of Sales, POS), vehicle-mounted computer etc..

Base station 101 to terminal device 102 provide wireless interface, also referred to as air interface, eat dishes without rice or wine, terminal device 102 pass through 101 access to wireless communication system of base station.In addition, base station 101 may also include the control equipment for managing base station 101.

Such as: for LTE systems such as TDD LTE, FDD LTE or LTE-A, base station 101 can be evolution node B (evolved NodeB, eNodeB), and terminal device 102 can be UE；For TD-SCDMA system or WCDMA system, base station 101 can include: node B (NodeB), or including NodeB and radio network controller (Radio Network Controller, RNC), terminal device 102 can be UE；For gsm system, base station 101 may include base transceiver station (Base Transceiver Station, BTS), or including BTS and base station controller (Base Station Controller, BSC), terminal device 102 is mobile station (Mobile Station, MS)；For WiFi system, base station 101 can include: access point (Access Point, AP) and/or access controller (Access Controller, AC), terminal device 102 can be website (Station, STA).

In order to facilitate understanding, in following description by taking LTE system as an example, but it is not meant to that the embodiment of the present invention is only applicable to LTE system, actually, it is any to use scheme provided in an embodiment of the present invention by dispatching the wireless communication system carried out data transmission, to provide TTI less than the scheduling that 1 subframe or the data of 1ms are transmitted.

Various embodiments of the present invention including embodiment one are suitable for the scene of transmitting uplink data and downlink data transmission.

In the following, introducing the scheduling flow of base station 101 and the transmission of 102 data of terminal device respectively.As shown in Fig. 2, the process includes the following steps:

S201: the determining data between terminal device 102 in base station 101 are transmitted as short TTI data and transmit；

S202: base station 101 configures short TTI data-transmission mode, and notice terminal device 102 carries out short TTI data transmission；

S203: terminal device 102 determines after the notice for receiving step S202 and carries out short TTI data transmission；

S204: base station 101 determines scheduling of resource granularity；

S205: base station 101 determines data transmission resources according to scheduling of resource granularity；

S206: base station 101 sends DCI, the data transmission resources that DCI instruction carries out data transmission with terminal device 102 to terminal device 102；

S207: terminal device 102 determines scheduling of resource granularity；

S208: terminal device 102 determines data transmission resources according to scheduling of resource granularity and DCI；

S209: terminal device 102 and base station 101 carry out data transmission on determining data transmission resources.

Wherein, step S201~step S203 is optional step, such as: when only carrying out according to preparatory agreement the transmission of short TTI data between base station 101 and terminal device 102, or when carrying out Common data transmission, step S201~step S203 can be omitted.

The process can be not only used for the scheduling of transmitting uplink data, it can also be used to the scheduling of downlink data transmission.In subsequent description, if indefinite differentiation, it is believed that being not only suitable for uplink is equally applicable to downlink.

Wherein, when data are transmitted as downlink data transmission, DCI may be used to indicate the transfer resource of downlink data transmission；When data are transmitted as transmitting uplink data, DCI may be used to indicate the transfer resource of transmitting uplink data.

In the following, the realization to each step is described in detail respectively.

[step S201]

Optionally, in step S201, base station 101 can be determining to carry out short TTI data transmission with terminal device 102 when meeting at least one in following condition:

The delay requirement of the currently used business of terminal device 102 is less than the delay threshold of setting；

Downlink system band is wider than the bandwidth threshold of setting；And

The resource availability that can be used for short TTI data transmission in system bandwidth is greater than the resource availability threshold value of setting.

Such as: delay requirement (latency requirement) of the base station 101 according to the currently used business of terminal device 102, the length of the TTI of configuration data transmission.Such as: for small time delay business, base station configures short TTI data transmission；For non-small time delay business, base station configures the data transmission of 1ms TTI, which may be configured as 0.1ms, 0.2ms etc..

For another example: base station 101 is according to system bandwidth, the length of the TTI of configuration data transmission.Specifically, base station 101 is according to downlink system bandwidth, the TTI length of the transmission of configurating downlink data or transmitting uplink data.When downlink system bandwidth is smaller, if carrying out short TTI data transmission, Physical Downlink Control Channel will lead to, such as: the expense of PDCCH is larger, influences data transmission.Such as: base station 101 can configure the downlink data transmission or transmitting uplink data of short TTI when downlink system band is wider than the bandwidth threshold of setting；In bandwidth threshold of the downlink system bandwidth no more than setting, the downlink data transmission or transmitting uplink data of short TTI are not configured.Optionally, base station 101 is according to up-link bandwidth, the TTI length of collocating uplink data transmission.Wherein, bandwidth threshold can are as follows: 6 RB, 10 RB, 25 RB, 26 RB, 49 RB, 50 RB or 63 RB.

For another example: delay requirement of the base station 101 according to the currently used business of terminal device 102, the length of the TTI of configuration data transmission.Such as: for small time delay business, base station configures short TTI data transmission；For non-small time delay business, base station configures the data transmission of 1ms TTI, which can be set as 0.1ms, 0.2ms etc..

For another example: when the available resource units (Resource Element, RE) in n downlink symbol are greater than M, base station can configure short TTI data transmission.When the available RE in n downlink symbol is not more than M, base station cannot configure short TTI data transmission.It here, can be the RE that can be used for short TTI data transmission with RE.

Wherein, 1,2,3,4,5,6 or 7 n；

M=L_MAX×M_CCE, alternatively, M=L_MAX×M_CCE+M_ex；

Wherein, L_MAXFor the maximum polymer grade of Physical Downlink Control Channel (such as PDCCH), M_CCEIndicate 1 CCE by M_CCEA RE composition, M_exFor the least RE number for the transmission of short TTI data, M_exIt can preset or base station is with postponing, be notified by high-level signaling to UE.

Such as: 20MHz downlink system bandwidth, wherein 100 RB can be used for short TTI data transmission, in this way, available RE in 1 downlink symbol is 1200 (not including cell specific reference signal (Cell-specific reference signals, CRS)) or 1000 (CRS comprising 1 antenna port). Assuming that n=1, L_MAX=8, M_CCE=36, M_ex=240 (not including CRS) or 200 (CRS comprising 1 antenna port), then M=528 or 488.So the available RE in 1 downlink symbol is greater than M, base station can configure short TTI data transmission.

For another example: 5MHz downlink system bandwidth, wherein 25 RB can be used for short TTI data transmission transmission, in this way, available RE in 1 downlink symbol is 300 (not including cell specific reference signal (CRS, Cell-specific reference signals)) or 250 (CRS comprising 1 antenna port).Assuming that n=1, L_MAX=8, M_CCE=36, M_ex=240 (not including CRS) or 200 (CRS comprising 1 antenna port), then M=528 or 488.So the available RE in 1 downlink symbol is less than M, base station cannot configure short TTI data transmission.

Here, resource availability threshold value is M divided by n.

[step S202]

After data of the base station 101 in step s 201 between determination and terminal device 102 are transmitted as short TTI data transmission, terminal device 102 can be notified by high-level signaling or physical layer signaling, data between base station 101 and terminal device 102 are transmitted as short TTI data transmission, i.e., base station 101 is configured with short TTI data-transmission mode.High-level signaling (High Layer Signaling) is for opposite physical layer signaling, the slower signaling of frequency is sent from higher level (layer), including wireless heterogeneous networks (Radio Resource Control, RRC) signaling and media access control (Media Access Control, MAC) signaling.Further, base station can notify terminal device 102 by high-level signaling or physical layer signaling, and the transmitting uplink data or downlink data transmission between base station 101 and terminal device 102 are the transmission of short TTI data.When base station 101 notifies terminal device 102 by physical layer signaling, base station 101 is in downlink control area or sends DCI format 0/1/1A/1B/1D/2/2A/2B/2C/2D/4 or sends the DCI in the embodiment of the present invention.When base station 101 sends DCI format 1/1A/1B/1D/2/2A/2B/2C/2D, what base station 101 was dispatched is the downlink data packet that TTI is equal to 1ms.When base station 101 sends DCI format 0/4, what base station 101 was dispatched is that TTI is equal to 1ms upstream data packet；When base station 101 send be DCI in the embodiment of the present invention when, base station 101 dispatch be short TTI data packet.In order to reduce the PDCCH blind Detecting number of UE, the Downlink Control Information bit number of the DCI and DCI format 1A/DCI format 0 in the embodiment of the present invention can be configured as many.

[step S203]

After the notice for receiving step S202, the data between determining and base station 101 are transmitted as short TTI data and transmit terminal device 102.Further, for terminal device 102 after the notice for receiving step S202, transmitting uplink data or downlink data transmission between determining and base station 101 are the transmission of short TTI data.

[step S204]

In step S204, base station 101 five kinds of modes listed by the table 1 can be used including one of various ways, determine scheduling of resource granularity:

Table 1, five kinds of modes for determining scheduling of resource granularity

Wherein, DCI is used to indicate the data transmission resources of the data transmission carried out with terminal device 102.

Wherein, scheduling of resource granularity can dispatch granularity or frequency domain resource scheduling granularity for time-domain resource.In subsequent description, if not distinguishing time-domain resource scheduling granularity and frequency domain resource scheduling granularity, it is believed that being not only suitable for time domain is also to be suitable for frequency domain.

Wherein, there are the transmission of 1ms TTI data and the transmission of short TTI data in system.In order to distinguish the frequency domain resource that the two respectively can be used, base station 101 is it needs to be determined that short TTI data transmit the bandwidth that can be occupied.Further, base station 101 notifies UE that short TTI data transmit the bandwidth that can be occupied by high-level signaling or physical layer signaling.Short TTI data transmit the bandwidth that can be occupied, can referred to as " short TTI data transmit available bandwidth ".

Wherein, determine scheduling of resource granularity according to mode one, mode four or mode five, then optionally, The CCE aggregation level for carrying the Physical Downlink Control Channel of DCI is higher, and scheduling of resource granularity is bigger.

When employing mode one, mode four or mode five, base station 101 can first determine that the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI.Optionally, base station 101 can determine the CCE aggregation level according to the channel status of terminal device 102.

Such as: when the bad channel conditions of terminal device 102, base station 101 determines that Physical Downlink Control Channel uses high CCE polymer grade, such as L=8,16 or 32；When the channel condition of terminal device 102 is medium, base station 101 determines that Physical Downlink Control Channel uses medium CCE polymer grade, such as L=4；When the channel condition of terminal device 102 is good, base station 101 determines that Physical Downlink Control Channel uses low CCE polymer grade, such as L=1 or 2.

Wherein, base station 101 can determine the channel condition of terminal device 102 in several ways.

Such as: base station 101 determines the channel condition of terminal device 102 according to the ChannelMeasurementReport DETAILED that terminal device 102 reports.Such as: the ChannelMeasurementReport DETAILED can be channel state information (CSI, Channel State Information), the Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio, SINR) of CSI instruction is higher, and channel condition is better.Or ChannelMeasurementReport DETAILED is also possible to downstream signal reception intensity, and such as: Reference Signal Received Power (Reference Signal Receiving Power, RSRP), intensity is bigger, and channel condition is better.The measurement amount that ChannelMeasurementReport DETAILED can report, which has, is much used equally for the channel condition for measuring terminal device 102 to will not enumerate here as space is limited.

For another example: base station 101 is measured by the uplink reference signals sent to terminal device 102, to determine the channel condition of terminal device 102.Here uplink reference signals may include but be not limited to: detection reference signal (Sounding Reference Signal, SRS) and demodulated reference signal (DeModulation Reference Signal, DMRS) etc..

Base station 101 determines that 102 channel condition of terminal device is not limited to above two mode, will not enumerate here.

In addition, base station 101 can also determine the CCE aggregation level that Physical Downlink Control Channel uses according to the information bit of the DCI sent to terminal device 102.When information bit is larger, base station determine Physical Downlink Control Channel cannot use L for 1 CCE polymer grade.This is because 1 CCE includes 36 RE, when CCE aggregation level is 1, the information bit that 36 RE can be carried is limited, because This, when the information bit for including in DCI is more, the CCE that can not be 1 by aggregation level is carried.

In the following, illustrating that base station 101 in mode one determines the scheme of scheduling of resource granularity according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI so that uplink time-domain resource dispatches granularity as an example.

Optionally, base station 101 can determine that uplink time-domain resource dispatches granularity according at least one of following rule:

When CCE aggregation level is 1, illustrate that the channel status of terminal device 102 is good, then base station 101 determines that uplink time-domain resource scheduling granularity is 1 symbol；

When CCE aggregation level is 2, illustrate that the channel status of terminal device 102 is slightly good, then base station 101 determines that uplink time-domain resource scheduling granularity is 1 or 2 symbol；

When CCE aggregation level is 4, illustrate that the channel status of terminal device 102 is bad, then base station 101 determines that uplink time-domain resource scheduling granularity is 3 symbols or 4 symbols or 1 slot；

When CCE aggregation level is 8, illustrate that the channel status of terminal device 102 is excessively poor, then base station 101 determines that uplink time-domain resource scheduling granularity is 1 slot.

In the following, distinguishing downlink time-domain resource scheduling granularity, downlink frequency domain scheduling of resource granularity and uplink frequency domain resources dispatches granularity, concrete scheme when employing mode two or the determination scheduling of resource granularity of mode three is illustrated.

One, downlink time-domain resource dispatches granularity

Available bandwidth is transmitted according to downlink system bandwidth or the short TTI data of downlink in base station 101, determines that downlink time-domain resource dispatches granularity.

Wherein, downlink system bandwidth or the short TTI data transmission available bandwidth of downlink are smaller, and time-domain resource scheduling granularity is bigger, that is, the downlink symbol number for including is more.

It is assumed that time-domain resource scheduling granularity is N_symb, whereinAlternatively,Or

Alternatively,

Wherein,For the RB number for including in downlink bandwidth, that is, represent downlink bandwidth；The RB number for including in available bandwidth is transmitted for the short TTI data of downlink, that is, represents the short TTI data transmission available bandwidth of downlink.

Alternatively, base station 101 can determine that downlink time-domain resource dispatches granularity according at least one rule in following rules:

When downlink system bandwidth is less than or equal to 10 RB, the time-domain resource scheduling granularity of the short TTI data packet of downlink is a time slot；

When downlink system bandwidth is 11~26 RB, the time-domain resource scheduling granularity of the short TTI data packet of downlink is 3 or 4 symbols, or is a time slot；

When downlink system bandwidth is 27~63 RB, the time-domain resource scheduling granularity of the short TTI data packet of downlink is 2,3 or 4 symbols, or is a time slot；

When downlink system bandwidth is 64~110 RB, the time-domain resource scheduling granularity of the short TTI data packet of downlink is 1 or 2 symbol.

The situation of TTI data transmission available bandwidth short for downlink, the downlink system bandwidth in above-mentioned rule can be replaced with the short TTI data transmission available bandwidth of downlink, and can be set as needed including RB number, time-domain resource dispatches granularity, principle is similar with the situation of downlink system bandwidth, and description is not repeated herein.Optionally, the RB number for including is set and time-domain resource scheduling granularity is same as above, optionally, value range can be identical as the situation of downlink system bandwidth, or adjusts according to the actual situation.

Two, downlink frequency domain scheduling of resource granularity

Available bandwidth is transmitted according to downlink system bandwidth or the short TTI data of downlink in base station 101, determines downlink frequency domain scheduling of resource granularity.

Wherein, downlink system bandwidth or the short TTI data transmission available bandwidth of downlink are smaller, and the frequency domain resource scheduling granularity number for including in downlink system bandwidth or the short TTI data transmission available bandwidth of downlink is fewer.

Base station 101 can determine downlink frequency domain scheduling of resource granularity according at least one rule in following rule:

When downlink system bandwidth is less than or equal to 10 RB, downlink frequency domain scheduling of resource granularity isA RB；

When downlink system bandwidth is 11~26 RB, downlink frequency domain scheduling of resource granularity isOrA RB；

When downlink system bandwidth is 27~63 RB, downlink frequency domain scheduling of resource granularity isOrOrA RB；

When downlink system bandwidth is 64~110 RB, downlink frequency domain scheduling of resource granularity isOrA RB.

Wherein,It indicates to be rounded downwards.

The situation of TTI data transmission available bandwidth short for downlink, the downlink system bandwidth in above-mentioned rule can be replaced with the short TTI data transmission available bandwidth of downlink, and can be set as needed including RB number, frequency domain resource scheduling granularity, principle is similar with the situation of downlink system bandwidth, and description is not repeated herein.Optionally, the RB number for including is set and frequency domain resource scheduling granularity is same as above, optionally, value range can be identical as the situation of downlink system bandwidth, or adjusts according to the actual situation.

Three, uplink frequency domain resources dispatch granularity

Available bandwidth is transmitted according to up-link bandwidth or the short TTI data of uplink in base station 101, determines that uplink frequency domain resources dispatch granularity.

Wherein, up-link bandwidth or the short TTI data transmission available bandwidth of uplink are smaller, and the frequency domain resource scheduling granularity number for including in up-link bandwidth or the short TTI data transmission available bandwidth of uplink is fewer.

Base station 101 can determine that uplink frequency domain resources dispatch granularity according to following rules:

When up-link bandwidth is less than or equal to 10 RB, uplink frequency domain resources scheduling granularity isA RB；

When up-link bandwidth is 11~26 RB, uplink frequency domain resources scheduling granularity isOrA RB；

When up-link bandwidth is 27~63 RB, uplink frequency domain resources scheduling granularity isOrOrA RB；

When up-link bandwidth is 64~110 RB, uplink frequency domain resources scheduling granularity isOrA RB.

The situation of TTI data transmission available bandwidth short for uplink, the up-link bandwidth in above-mentioned rule can be replaced with the short TTI data transmission available bandwidth of uplink, and can be set as needed including RB number, frequency domain resource scheduling granularity, principle is similar with the situation of up-link bandwidth, and description is not repeated herein.Optionally, the RB number for including is set and frequency domain resource scheduling granularity is same as above, optionally, value range can be identical as the situation of downlink system bandwidth, or adjusts according to the actual situation.

In the following, distinguishing downlink time-domain resource scheduling granularity, downlink frequency domain scheduling of resource granularity and uplink frequency domain resources dispatches granularity, concrete scheme when employing mode four or the determination scheduling of resource granularity of mode five is illustrated.

One, downlink time-domain resource dispatches granularity

Base station 101 determines that downlink time-domain resource scheduling granularity or base station 101 determine that downlink time-domain resource dispatches granularity according to the short TTI data transmission available bandwidth of CCE aggregation level and downlink of the Physical Downlink Control Channel of carrying DCI according to the CCE aggregation level and downlink system bandwidth of the Physical Downlink Control Channel of carrying DCI.

Time-domain resource scheduling granularity is denoted as set of symbols (SG, Symbol Group).

Wherein, downlink system bandwidth (or the short TTI data of downlink transmit available bandwidth) is bigger, and it is smaller that downlink time-domain resource dispatches granularity；If downlink system bandwidth (or the short TTI data of downlink transmit available bandwidth) is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of DCI is higher, then downlink time-domain resource It is bigger to dispatch granularity.

Such as: it is N that downlink time-domain resource, which dispatches granularity,_symb；

For the situation of downlink system bandwidth,Or

The situation of TTI data transmission available bandwidth short for downlink,Or

For another example: base station 101 determines that downlink time-domain resource dispatches granularity according to following rule:

When CCE polymer grade is 1, which includes at least one of following rules: when system bandwidth is less than or equal to 10 RB, base station 101 determines that downlink time-domain resource scheduling granularity is 1 or 2 symbol；When system bandwidth is greater than 10 RB, base station determines that the minimum time-domain resource scheduling granularity of the short TTI data packet of downlink is 1 symbol.

When CCE polymer grade is 2, which includes at least one of following rules:

When downlink system bandwidth is less than or equal to 10 RB, it is 2,3 or 4 symbols that downlink time-domain resource, which dispatches granularity,；When downlink system bandwidth is 11~26 RB, it is 1 or 2 symbol that downlink time-domain resource, which dispatches granularity,；When downlink system bandwidth is 27~63 RB, base station determines that the minimum time-domain resource scheduling granularity of the short TTI data packet of downlink is 1 or 2 symbol；When downlink system bandwidth is 64~110 RB, it is 1 symbol that downlink time-domain resource, which dispatches granularity,.

When CCE polymer grade is 4, which includes at least one of following rules:

When downlink system bandwidth is less than or equal to 10 RB, it is 3 or 4 symbols that downlink time-domain resource, which dispatches granularity, or is a time slot (slot)；When downlink system bandwidth is 11~26 RB, when downlink Domain scheduling of resource granularity is 2,3 or 4 symbols, or is a time slot；When downlink system bandwidth is 27~63 RB, it is 1,2,3 or 4 symbol that downlink time-domain resource, which dispatches granularity,；When downlink system bandwidth is 64~110 RB, it is 1 or 2 symbol that downlink time-domain resource, which dispatches granularity,.

When CCE polymer grade is 8, which includes at least one of following rules:

When downlink system bandwidth is less than or equal to 10 RB, it is a time slot that downlink time-domain resource, which dispatches granularity,；When downlink system bandwidth is 11~26 RB, it is 3 or 4 symbols that downlink time-domain resource, which dispatches granularity, or is a time slot；When downlink system bandwidth is 27~63 RB, it is 2,3 or 4 symbols that downlink time-domain resource, which dispatches granularity, or is a time slot；When downlink system bandwidth is 64~110 RB, it is 1 or 2 symbol that downlink time-domain resource, which dispatches granularity,.

According to above-mentioned rule, optionally, base station 101 can determine that downlink time-domain resource dispatches granularity according to following table 2.

Table 2, base station 101 determine that downlink time-domain resource dispatches granularity SG according to aggregation level and downlink system bandwidth

The situation of TTI data transmission available bandwidth short for downlink, the downlink system bandwidth in above-mentioned rule can be replaced with the short TTI data transmission available bandwidth of downlink, and the RB number for including in bandwidth can be set as needed, time-domain resource dispatches granularity, principle is similar with the situation of downlink system bandwidth, is not repeated herein and retouches It states.Optionally, the RB number for including is set and time-domain resource scheduling granularity is same as above, optionally, value range can be identical as the situation of downlink system bandwidth, or adjusts according to the actual situation.

Two, downlink frequency domain scheduling of resource granularity

Base station 101 determines that downlink frequency domain scheduling of resource granularity or base station 101 determine downlink frequency domain scheduling of resource granularity according to the short TTI data transmission available bandwidth of CCE aggregation level and downlink of the Physical Downlink Control Channel of carrying DCI according to the CCE aggregation level and downlink system bandwidth of the Physical Downlink Control Channel of carrying DCI.

Frequency domain resource scheduling granularity is denoted as resource block group (RBG, Resource Block Group).

Wherein, downlink system bandwidth (or the short TTI data of downlink transmit available bandwidth) is bigger, and the frequency domain resource scheduling granularity number for including in downlink system bandwidth (or the short TTI data of downlink transmit available bandwidth) is fewer；If downlink system bandwidth (or the short TTI data of downlink transmit available bandwidth) is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of DCI is higher, then downlink frequency domain scheduling of resource granularity is bigger.

Such as: base station 101 determines downlink frequency domain scheduling of resource granularity according to following rule:

When CCE aggregation level is 1 or 2, which includes at least one of following rules: when downlink system bandwidth is less than or equal to 10 RB, downlink frequency domain scheduling of resource granularity isA RB；When downlink system bandwidth is 11~26 RB, downlink frequency domain scheduling of resource granularity isOrA RB；When downlink system bandwidth is 27~63 RB, downlink frequency domain scheduling of resource granularity isOrOrA RB；When downlink system bandwidth is 64~110 RB, downlink frequency domain scheduling of resource granularity isOrA RB.Wherein,It indicates to be rounded downwards.

When CCE aggregation level is 4, which includes at least one of following rules: when downlink system bandwidth is less than or equal to 10 RB, downlink frequency domain scheduling of resource granularity isA RB；When downlink system bandwidth is 11~26 RB, downlink frequency domain scheduling of resource granularity isA RB；When downlink system bandwidth is 27~63 When a RB, downlink frequency domain scheduling of resource granularity isOrA RB；When downlink system bandwidth is 64~110 RB, downlink frequency domain scheduling of resource granularity isOrA RB.

When CCE aggregation level is 8, which includes at least one of following rules: when downlink system bandwidth is less than or equal to 10 RB, downlink frequency domain scheduling of resource granularity isA RB；When downlink system bandwidth is 11~26 RB, downlink frequency domain scheduling of resource granularity isA RB；When downlink system bandwidth is 27~63 RB, downlink frequency domain scheduling of resource granularity isA RB；When downlink system bandwidth is 64~110 RB, downlink frequency domain scheduling of resource granularity isA RB.

According to above-mentioned resource allocation rule, it is preferable that base station determines downlink frequency domain scheduling of resource granularity according to the CCE polymer grade, as shown in table 2.

Table 2, base station 101 determine downlink frequency domain scheduling of resource granularity RBG according to aggregation level and downlink system bandwidth

The situation of TTI data transmission available bandwidth short for downlink, the downlink system bandwidth in above-mentioned rule can be replaced with the short TTI data transmission available bandwidth of downlink, and the RB number for including in bandwidth can be set as needed, frequency domain resource scheduling granularity, principle is similar with the situation of downlink system bandwidth, and description is not repeated herein.Optionally, the RB number for including is set and frequency domain resource scheduling granularity is same as above, optionally, value range can be identical as the situation of downlink system bandwidth, or adjusts according to the actual situation.

Three, uplink frequency domain resources dispatch granularity

The method of the determination of base station 101 uplink frequency domain resources scheduling granularity is similar with the two, mode of downlink frequency domain scheduling of resource granularity, wherein can incite somebody to actionIt replaces withAnd the case where according to uplink, the RB number for including in bandwidth is set.

The scheme that the base station step S204 101 determines scheduling of resource granularity is described above.Step S205 is described below, base station 101 determines data transmission resources according to scheduling of resource granularity.

[step S205]

Base station can have following several situations when determining data transmission resources:

Situation one

Scheduling of resource granularity includes: time-domain resource scheduling granularity, base station 101 is dispatched granularity (it can be integer symbol that the time-domain resource, which dispatches granularity) according to time-domain resource, determining to carry out data transmission the symbol that used data transmission resources occupy in the time domain with terminal device 102.

Also, situation is once, the distinct symbols that data transmission resources occupy in the time domain, and data transmission resources occupy the frequency domain resource of same band on frequency domain.

For downlink, which can are as follows: downlink system bandwidthThe short TTI data of downlink transmit available bandwidthOr downlink specific bandwidthSuch as: the specific bandwidthIt can be 3,4,5,10,14,15,20 or 25；For uplink, which can are as follows: downlink system bandwidthThe short TTI data of downlink transmit available bandwidthOr downlink specific bandwidthSuch as: the specific bandwidthIt can be 3,4,5,10,14,15,20 or 25.

Wherein, base station 101 and terminal device 102 can arrange the same band by high-level signaling according to the regulation in agreement, or between data transmission, and such DCI is just not necessarily to the frequency domain resource of information bit designation date transfer resource occupancy.

For situation one, there is the kinds of schemes including following several optional implementations, citing is described below below:

Optinal plan one

It is several symbols originated that data transmission resources, which are occupied in the time domain with reference symbol,.

Wherein, reference symbol are as follows: k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI or k-th of symbol after the occupied last symbol of the DCI, k is positive integer.For transmitting uplink data, it is several uplink symbols originated that data transmission resources, which are occupied in the time domain with reference symbol,.For downlink data transmission, it is several downlink symbols originated that data transmission resources, which are occupied in the time domain with reference symbol,.

In optinal plan one and subsequent scheme, base station 101 and terminal device 102 can be according to the regulations in agreement, or arrange the position of reference symbol, to be just not necessarily to the initial position of designation date transfer resource in the time domain in such DCI by high-level signaling between data transmission.

At this point, DCI can only include the information for being used to indicate relative position of several the above-mentioned symbols relative to reference symbol.When CP is common CP, assuming that data transmission resources first symbol occupied in the time domain of distribution and the interval of last symbol are not more than 6 symbols, by taking time-domain resource scheduling granularity is 1 symbol as an example, at this point, the bitmap of 7bit is then only needed to be used to indicate position of several the above-mentioned symbols relative to reference symbol；By taking time-domain resource scheduling granularity is 2 symbols as an example, such as: base station 101 is that terminal device 102 distributes symbol 2, 3, 5, 6, at this time, since time-domain resource scheduling granularity is 2 symbols, therefore, it is not in 1 in the symbol of distribution, 3, the situation of 5 symbols single in this way, therefore, only need to indicate relative position of each time-domain resource scheduling granularity relative to reference symbol, at this time, then only need the bitmap of 6bit, such as: the symbol distributed for terminal device 102 is symbol 1, 2, 3, 4, 6, 7, bitmap101001 instruction then can be used, after terminal device 102 receives the information of the relative position, in the symbol for determining distribution, first time-domain resource scheduling granularity and one symbol of reference symbol distance, second time-domain resource scheduling granularity with 3 symbols of reference symbol distance, third time-domain resource dispatch granularity and 6 symbols of reference symbol distance.Compared with the RA information in current DCI, the information bit of occupancy is less.Such resource distribution mode can be described as discontinuous time-domain resource distribution (Time Resource Allocation, TRA).

Optinal plan two

It is the continuous X symbol originated that data transmission resources, which are occupied in the time domain with reference symbol, and X is positive integer.

At this point, DCI can only include the Length Indication information for being used to indicate X.When CP is common CP, Assuming that the length of time-domain resource is not more than 7 symbols, by taking time-domain resource scheduling granularity is 1 symbol as an example, then 3 bit indication X (as previously mentioned, the position of reference symbol is without instruction) is only needed at this time；By taking time-domain resource scheduling granularity is 3 symbols as an example, then 1 bit indication X is only needed at this time, such as: " 0 " indicates that length is 3 symbols, and " 1 " indicates that length is 6 symbols.Compared with the RA information in current DCI, the information bit of occupancy is less.Such resource distribution mode can be described as continuous T RA, and when short TTI data transmission resources occupy system bandwidth on frequency domain, which can be as shown in figure 3, wherein dash area be the symbol that data transmission resources occupy；When short TTI data transmission resources occupy specific bandwidth on frequency domain, which can be as shown in figure 4, wherein dash area be the symbol that data transmission resources occupy.

Or the specific bandwidth in Fig. 4 can be indicated by the information bit in DCI, such as: whole system bandwidth is divided into 5 parts, specific bandwidth can be indicated with the bitmap of 5bit, and X is indicated by 3bit, at this time, it can only include the data transmission resources (as previously mentioned, the position of reference symbol is without instruction) that 8bit information is used to indicate distribution in DCI.

Optinal plan three

Data transmission resources occupy the continuous symbol identical with symbolic number included by time-domain resource granularity of reference symbol starting in the time domain.

At this time, since the position of reference symbol is without instruction, and occupy the frequency domain resource of setting, frequency domain resource is indicated without information bit, therefore the information bit that data transmission resources are used to indicate in DCI can be sky, that is may not include the information bit for explicit instruction data transmission resources in DCI, but terminal device 102 can still be determined according to DCI using data transmission resources.

Situation two

Scheduling of resource granularity includes: frequency domain resource scheduling granularity, and base station 101 determines the resource that data transmission resources occupy on frequency domain according to frequency domain resource scheduling granularity；And

Also, under situation two, data transmission resources occupy N number of continuous symbol in the time domain, and N is positive integer, and when cyclic prefix CP is long CP, N is not more than 6, and when CP is common CP, N is not more than 7.

Wherein, base station 101 and terminal device 102 can be according to the regulations in agreement, or arrange between data transmission the position of N number of symbol, just to provide without designation date transmission in such DCI by control message The time-domain position in source.

In situation two, base station 101 can determine that the resource that data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity, such as: continuous resource is occupied, and the resource occupied is big as the frequency domain resource scheduling granularity；And the primary sign that data transmission resources occupy in the time domain is reference symbol, the reference symbol is the last symbol that first symbol, the DCI that DCI is occupied are occupied, or k-th of symbol after occupied first symbol of DCI or last symbol, k is positive integer；

At this point, DCI can only include the information for being used to indicate the frequency domain initial position of data transmission resources, the information of the frequency domain initial position can be what base station 101 was generated according to frequency domain resource scheduling granularity.

By taking downlink data transmits as an example, it is assumed that downlink system bandwidth be 20MHz (including 100 RB), frequency domain dispatching granularity be 20RB then frequency domain initial position only have 5 kinds may (No. RB be 0,20,40,60,80), base station 101 only needs 3 bit indication frequency domain initial positions.Such as: ' 000 ' indicates that frequency domain initial position is No. RB RB equal to 0, and ' 010 ' indicates the RB that frequency domain initial position is equal to 40 for No. RB.At this time, it is only necessary to which the data transmission resources of 3bit instruction distribution, compared with current RA information, information bit is less.

Situation three

Scheduling of resource granularity includes: frequency domain resource scheduling granularity and time-domain resource scheduling granularity, base station 101 granularity is dispatched according to time-domain resource, it determines the symbol that data transmission resources occupy in the time domain, and according to frequency domain resource scheduling granularity, determines the resource that data transmission resources occupy on frequency domain.

For situation three, there is the kinds of schemes including following several optional implementations, citing is described below below:

Optinal plan one

Data transmission resources occupy continuous symbol in the time domain, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes, and the resource that occupancy is occupied on frequency domain is big as the frequency domain resource scheduling granularity；And the primary sign that data transmission resources occupy in the time domain is reference symbol.

At this point, DCI can only include the information for being used to indicate the frequency domain initial position of data transmission resources, the information of frequency domain initial position can be what base station 101 was generated according to frequency domain resource scheduling granularity.

By taking downlink data transmits as an example, it is assumed that downlink system bandwidth is 20MHz (including 100 RB), Frequency domain dispatching granularity is that then frequency domain initial position only has 5 kinds possible (No. RB is 0,20,40,60,80) to 20RB, and base station 101 only needs 3 bit indication frequency domain initial positions.Such as: ' 000 ' indicates that frequency domain initial position is No. RB RB equal to 0, and ' 010 ' indicates the RB that frequency domain initial position is equal to 40 for No. RB.At this time, it is only necessary to which the data transmission resources of 3bit instruction distribution, compared with current RA information, information bit is less.

Optinal plan two

Data transmission resources occupy the continuous X symbol of reference symbol starting in the time domain, and X is positive integer, and data transmission resources are the resource of the nominated bandwidth originated with frequency domain indicating positions on frequency domain.

At this point, may include following information in DCI:

The information of the frequency domain initial position of data transmission resources；

The bandwidth information of above-mentioned nominated bandwidth；

It is used to indicate the Length Indication information of X.

Wherein, the information and bandwidth information of frequency domain initial position can be generated by base station 101 according to frequency domain resource scheduling granularity.

By taking downlink data transmits as an example, assuming that downlink system bandwidth is 20MHz (including 100 RB), frequency domain dispatching granularity is 20RB, then frequency domain initial position only have 5 kinds may (No. RB be 0,20,40,60,80), base station 101 only needs 3 bit indication frequency domain initial positions, and the bandwidth of 3 bit indication data transmission resources (such as: RB number is 20,40,60,80 or 100).Such as: ' 000 ' indicates that frequency domain initial position is No. RB RB equal to 0, and ' 010 ' indicates the RB that frequency domain initial position is equal to 40 for No. RB.' 000 ' indicates that bandwidth is 20RB, and ' 011 ' indicates that bandwidth is 80RB.

Assuming that the length of time-domain resource is not more than 7 symbols, by taking time-domain resource scheduling granularity is 1 symbol as an example, then 3 bit indication X (as previously mentioned, the position of reference symbol is without instruction) is only needed at this time；By taking time-domain resource scheduling granularity is 3 symbols as an example, then 1 bit indication X is only needed at this time, such as: " 0 " indicates that length is 3 symbols, and " 1 " indicates that length is 6 symbols.

By taking time-domain resource scheduling granularity is 1 symbol as an example, it is only necessary to which the data transmission resources of 3+3+3=9bit instruction distribution, compared with current RA information, information bit is less.

Situation four

Data transmission resources occupy N number of symbol in the time domain, and for the distinct symbols that data transmission resources occupy in the time domain, and data transmission resources occupy the frequency domain resource of same band on frequency domain；Or

Data transmission resources occupy N number of symbol in the time domain, and time domain initial position is reference symbol, and for the distinct symbols that data transmission resources occupy in the time domain, the resource that data transmission resources occupy on frequency domain is big as frequency domain resource scheduling granularity；And according to the agreement of the control message before agreement or data transmission, the frequency domain initial position of data transmission resources is first RB that DCI is occupied.

At this point, being used to indicate the information bit of data transmission resources in DCI as sky, i.e. it may not include the information bit for being used to indicate data transmission resources in DCI.

Situation five

In situation five, the resource distribution mode of time domain after first frequency domain as shown in Figure 5 is can be used in base station 101.

At this point, base station 101 needs for downlink data transmissionThe data transmission resources of a bit indication distribution.Wherein,The symbolic number for including for a slot, whereinFor downlink system bandwidth, N_RBFor downlink frequency domain scheduling of resource granularity.

For transmitting uplink data, base station 101 needsThe data transmission resources of a bit indication distribution.Wherein,For up-link bandwidth, N_RBGranularity is dispatched for uplink frequency domain resources.

By taking downlink data transmits as an example, it is assumed that downlink system bandwidth is 20MHz (including 100 RB), and frequency domain dispatching granularity is 20RB, then downlink system bandwidth is divided into 5 parts.Assuming that time-domain resource scheduling granularity is not more than 7 symbols, time-domain resource is divided into 7 parts, a total of 7*5=35 parts of resource.One is selected from 35 parts of resources as starting point, and a value is selected to need 10bit in total according to above-mentioned formula as length, to designation date transfer resource.

If including the information bit for being used to indicate data transmission resources in DCI, which can be placed in RA information and issue terminal device 102 by base station 101.

[step S206]

In step S206, base station 101 sends DCI to terminal device 102.

Wherein, base station 101 DCI indicate with terminal device 102 carry out data transmission used in send DCI on data transmission resources.Such as: short TTI data are transmitted, base station 101 sends DCI, the DCI is carried on the first PDCCH, base station 101 determines that the time-frequency domain resources of the first PDCCH are located in first area, the first area is to carry out short TTI data with terminal device 102 to transmit used region, i.e. time-frequency domain resources region indicated by RA information in DCI.

Optionally, the PDCCH for carrying the DCI is mapped from first sign-on of above-mentioned first area, when the available resources for taking the first symbol just continue the available resources for being mapped to next symbol.In this way, terminal device 102 can be with fast decoding PDCCH.

Wherein, when the short TTI data transmission of DCI instruction uplink, base station 101 can determine the time-frequency domain resources of PDCCH according to the rule of setting, alternatively, base station notifies the time-frequency domain resources of 102 PDCCH of terminal device by high-level signaling or physical layer signaling.

Base station 101 assembles DCI, add the CRC of DCI, wherein, utilize radio network temporary identifier (the Radio Network Temporary Identity of terminal device 102, RNTI it) scrambles, then channel coding and rate-matched, and modulation are carried out to the DCI for being added to CRC, is finally mapped in time-frequency domain resources and sends.

[step S207]

In step S207, terminal device 102 determines scheduling of resource granularity.

Wherein, terminal device 102 determines that the method for scheduling of resource granularity determines that the method for scheduling of resource granularity is identical with base station 101 in step S204, it should be noted that, when terminal device 102 according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI to determine scheduling of resource granularity when, terminal device 102 can obtain the CCE aggregation level of the Physical Downlink Control Channel by the blind examination process of the Physical Downlink Control Channel to carrying DCI.

Such as: terminal device 102 can first determine the search space of Physical Downlink Control Channel.The search is empty Between be candidate physical down control channel set, by taking PDCCH as an example, the search space be candidate PDCCH (PDCCH candidate) gather.Terminal device 102 needs to monitor each of candidate PDCCH set candidate PDCCH, and therefore, searching plain space is the PDCCH set that terminal device 102 monitors.Each CCE aggregation level (aggregation level) corresponds to a search space.

For each CCE aggregation level, terminal device 102 carries out blind examination to each of the set of candidate PDCCH corresponding to CCE aggregation level candidate PDCCH, or detect the DCI for issuing itself, then determine the CCE aggregation level that candidate PDCCH set is corresponding belonging to the PDCCH, the CCE aggregation level of the PDCCH for the carrying DCI as to be determined.

[step S208]

In step S208, terminal device 102 determines data transmission resources according to scheduling of resource granularity and DCI.

Wherein, terminal device 102 interprets the RA information in DCI after receiving DCI, obtains the information for being used for data transmission resources.Terminal device 102 can be according to step S205, and base station 101 determines the opposite mode of data transmission resources, determines data transmission resources according to RA information and scheduling of resource granularity.

It is illustrated by taking the optinal plan one in the situation one in step S205 as an example below, similarly, which is not described herein again for the method for salary distribution of other data transmission resources.

In the optinal plan one of situation one, for the distinct symbols that data transmission resources occupy in the time domain, data transmission resources occupy same band frequency domain resource on frequency domain, and data transmission resources occupy several symbols of reference symbol starting in the time domain.

Wherein, as previously described, what the frequency domain resource that base station 101 and terminal device 102 both know about same band before data is transmitted is, and know the position of reference symbol, after what then terminal device 102 included in receiving DCI is used to indicate information of several the above-mentioned symbols relative to the relative position of reference symbol, that is, which the symbol that can determine that data transmission resources occupy in the time domain has.The data transmission resources of time domain and the data transmission resources of frequency domain have thus been determined respectively.

[step S209]

Carry out data transmission on the data transmission resources that base station 101 determines in step S205 with terminal device 102, and carries out data transmission on the data transmission resources that terminal device 102 determines in step S208 according to DCI with base station 101.Specifically, for downlink data transmission, base station 101 is true in step S205 Downlink data packet is sent on fixed data transmission resources, receives downlink data packet on the data transmission resources that terminal device 102 determines in step S208 according to DCI；For transmitting uplink data, upstream data packet is sent on the data transmission resources that terminal device 102 determines in step S208 according to DCI, receives upstream data packet on the data transmission resources that base station 101 determines in step S205.

[embodiment two]

As shown in fig. 6, the base station that embodiment two provides includes: processing module 601 and transceiver module 602.Wherein,

Processing module 601, for determining scheduling of resource granularity, according to determining scheduling of resource granularity, determine dispatch terminal equipment carry out data transmission used in short TTI data transmission resources, which less than the length of 1 subframe or is less than 1ms in the time domain；

Transceiver module 602, for sending Downlink Control Information DCI to terminal device, which is used to indicate above-mentioned short TTI data transmission resources；And carried out data transmission using the short TTI data transmission resources with terminal device.

Optionally, processing module 601 is specifically used for: scheduling of resource granularity is determined using one of following manner:

Scheduling of resource granularity is determined according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI；

Scheduling of resource granularity is determined according to system bandwidth；

Available bandwidth, which is transmitted, according to short TTI data determines scheduling of resource granularity；

Scheduling of resource granularity is determined according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI and system bandwidth；And

Scheduling of resource granularity is determined according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI and short TTI data transmission available bandwidth；

Wherein, short TTI data transmission available bandwidth is the bandwidth that short TTI data transmission resources can occupy.

Optionally, if processing module 601 determines scheduling of resource granularity according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI,

The CCE aggregation level for carrying the Physical Downlink Control Channel of DCI is higher, and scheduling of resource granularity is bigger.

Optionally, scheduling of resource granularity includes time-domain resource scheduling granularity, and time-domain resource scheduling granularity is minimum time-domain resource allocation unit when base station schedules terminals equipment carries out the transmission of short TTI data, including at least One symbol；

If processing module 601 determines scheduling of resource granularity according to the CCE aggregation level and system bandwidth of the Physical Downlink Control Channel of carrying DCI,

System bandwidth is bigger, and it is smaller that time-domain resource dispatches granularity；

If system bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of DCI is higher, and it is bigger that time-domain resource dispatches granularity.

If processing module 601 determines scheduling of resource granularity according to the CCE aggregation level and short TTI data transmission available bandwidth of the Physical Downlink Control Channel of carrying DCI,

Short TTI data transmission available bandwidth is bigger, and it is smaller that time-domain resource dispatches granularity；

If short TTI data transmission available bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of DCI is higher, and it is bigger that time-domain resource dispatches granularity.

Optionally, scheduling of resource granularity includes: time-domain resource scheduling granularity, and time-domain resource scheduling granularity is minimum time-domain resource allocation unit when base station schedules terminals equipment carries out the transmission of short TTI data, including at least one symbol；

Processing module 601 is specifically used for:

Granularity is dispatched according to time-domain resource, determines that the symbol that short TTI data transmission resources occupy in the time domain, the distinct symbols in symbol occupied in the time domain occupy the frequency domain resource of same band on frequency domain；

Same band refers to: identical system bandwidth, identical short TTI data transmission available bandwidth or identical specific bandwidth；

Optionally, scheduling of resource granularity includes: frequency domain resource scheduling granularity, and frequency domain resource scheduling granularity is minimum frequency domain resource allocation unit when base station schedules terminals equipment carries out the transmission of short TTI data, including at least one RB；

Processing module 601 is specifically used for:

According to frequency domain resource scheduling granularity, the resource that short TTI data transmission resources occupy on frequency domain is determined, short TTI data transmission resources occupy N number of symbol in the time domain, N is positive integer, and when cyclic prefix CP is long CP, N is not more than 6, when CP is common CP, N is not more than 7.

Optionally, scheduling of resource granularity includes: frequency domain resource scheduling granularity and time-domain resource scheduling granularity；Frequency domain resource scheduling granularity is minimum frequency domain resource allocation unit when base station schedules terminals equipment carries out the transmission of short TTI data, including at least one RB；Time-domain resource scheduling granularity is minimum time-domain resource allocation unit when base station schedules terminals equipment carries out the transmission of short TTI data, including at least one symbol；

Processing module 601 is specifically used for:

Granularity is dispatched according to time-domain resource, determines the symbol that short TTI data transmission resources occupy in the time domain；And

According to frequency domain resource scheduling granularity, the resource that short TTI data transmission resources occupy on frequency domain is determined.

Optionally, processing module 601 is specifically used for: determining that data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, and X is positive integer, and X is the integral multiple that time-domain resource dispatches granularity；

Reference symbol are as follows: k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

DCI includes: the Length Indication information for being used to indicate X, and Length Indication information is that processing module 601 is generated according to time-domain resource scheduling granularity.

Optionally, processing module 601 is specifically used for: determining that short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting, and the symbolic number of occupancy is the integral multiple that time-domain resource dispatches granularity；

DCI includes: the information for being used to indicate several symbols relative to the relative position of reference symbol, and the information of relative position is that processing module 601 dispatches granularity according to time-domain resource and relative position generates.

Optionally, processing module 601 is specifically used for: determining that short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting, wherein, several symbols of occupancy are continuous, and the number of several symbols occupied is identical as symbol numbers included by time-domain resource granularity；

The information bit of short TTI data transmission resources is used to indicate in DCI as sky.

Optionally, processing module 601 is specifically used for:

The resource for determining that short TTI data transmission resources occupy on frequency domain is big as frequency domain resource scheduling granularity；And

Determine that the primary sign that short TTI data transmission resources occupy in the time domain is reference symbol, reference symbol is k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI, or k-th of symbol after the occupied last symbol of DCI, k are positive integer；

DCI includes: the information for being used to indicate the frequency domain initial position of short TTI data transmission resources, and the information of frequency domain initial position is that processing module 601 is generated according to frequency domain resource scheduling granularity.

Optionally, processing module 601 is specifically used for:

Determine that short TTI data transmission resources occupy continuous symbol in the time domain, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes；

Determine that the primary sign that data transmission resources occupy in the time domain is reference symbol；

Optionally, processing module 601 is specifically used for:

Determining that short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, and X is positive integer；Reference symbol are as follows: k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

Determine that short TTI data transmission resources are occupied on frequency domain with the resource for the nominated bandwidth that frequency domain initial position is starting；

DCI includes: the bandwidth information of the start position information and nominated bandwidth that are used to indicate frequency domain initial position, and is used to indicate the Length Indication information of X；Information, the bandwidth information of frequency domain initial position are that processing module 601 is generated according to frequency domain resource scheduling granularity, and Length Indication information is that processing module 601 is generated according to time-domain resource scheduling granularity.

Optionally, processing module 601 is also used to: before determining scheduling of resource granularity, determination meets at least one of following condition:

The delay requirement of the currently used business of terminal device is less than the delay threshold of setting；

System bandwidth is greater than the bandwidth threshold of setting；And

Optionally, transceiver module 602 is also used to:

Before sending DCI to terminal device, notify that the available short TTI data transmission resources of terminal device, available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or data transmit the time-domain resource that can be occupied by high-level signaling；

Optionally, transceiver module 602 is specifically used for:

DCI is sent on the short TTI data transmission resources of DCI instruction.

Optionally, transceiver module 602 is specifically used for:

When sending DCI, first sign-on mapping of the short TTI data transmission resources indicated from DCI is further continued for being mapped to next symbol when taking first symbol.

Other the optional implementations for the base station that embodiment two provides can refer to the channel radio of the offer of embodiment one Base station 101 in letter system.

Specifically, processing module 601 can be used for executing the operation of transmitting-receiving performed by base station 101 for executing processing operation performed by base station 101, transceiver module 602.

Wherein, the adoptable wireless communication standard in base station that embodiment two provides can refer to various wireless communication standards described in embodiment one.

Terminal device offer wireless interface of the base station that embodiment two provides into wireless communication system, also referred to as air interface are eated dishes without rice or wine, and terminal device passes through base station access to wireless communication system.

Such as: for LTE systems such as TDD LTE, FDD LTE or LTE-A, base station can be eNodeB；For TD-SCDMA system or WCDMA system, base station can include: NodeB, or including NodeB and RNC；For gsm system；Base station may include BTS, or including BTS and BSC；For WiFi system, base station can include: AP and/or AC.

The scheduling flow for the base station that embodiment two provides can refer to process shown in Fig. 2.Wherein, base station determines data transmission resources, the DCI for being used to indicate the data transmission resources is sent to terminal device, later, base station carries out data transmission on determining data transmission resources with terminal device.The processing of base station may include step S201, step S202, step S204, step S205, step S206 and step S209.The scheme of each step can distinguish step corresponding in reference implementation example one, and which is not described herein again.

In above steps, step S201, step S204, step S205 can be executed by processing module 601；Step S202, step S206 and step S209 can be executed by transceiver module 602, and optionally, transceiver module 602 can execute each step under the control of processing module 601.After the upstream data that step S209 transceiver module 602 receives terminal device transmission, upstream data can be given to processing module 601 to be further processed, such as: protocol processes of other layers such as the processing of the physical layer protocol such as channel decoding, demodulation and transport layer, application layer etc..

Wherein, the data transmission of base station scheduling can be uplink or downlink transfer.

Wherein, processing module 601 determines scheduling of resource granularity, determines data transmission resources, determines that the scheme of DCI can refer to the realization of base station 101 in embodiment one, and details are not described herein.

Fig. 7 shows a kind of optional implementation of base station, wherein processing module 601 can be realized that transceiver module 602 can be realized by the transceiver 702 in Fig. 7 by the processor 701 in Fig. 7.Wherein, Bus architecture may include the bus and bridge of any number of interconnection, and the various circuits for the memory that the one or more processors specifically represented by processor 701 and memory 703 represent link together.Bus architecture can also link together various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like, and these are all it is known in the art, and therefore, it will not be further described herein.Bus interface provides interface.Transceiver 702 can be multiple element, that is, includes transmitter and receiver, provide the unit for communicating over a transmission medium with various other devices.For different base stations, user interface 704, which can also be, external the interface for needing equipment is inscribed, and the equipment of connection includes but is not limited to keypad, display, loudspeaker, microphone, control stick etc..

Fig. 8 shows the optional implementation of another kind of base station, wherein processing module 601 can be realized that transceiver module 602 can be realized by the transceiver 802 in Fig. 8 by the processor 801 in Fig. 8.

[embodiment three]

As shown in figure 9, the terminal device that embodiment three provides includes: processing module 901 and transceiver module 902.Wherein,

Processing module 901, for determining scheduling of resource granularity；

Transceiver module 902, for receiving the DCI of base station transmission, the DCI be used to indicate the terminal device carry out data transmission used in short TTI data transmission resources, which less than the length of 1 subframe or is less than 1ms in the time domain；According to above-mentioned scheduling of resource granularity and DCI, determine that terminal device carries out above-mentioned data and transmits used short TTI data transmission resources；

And carried out data transmission using the short TTI data transmission resources with base station.

Optionally, processing module 901 is specifically used for: scheduling of resource granularity is determined using one of following manner:

Optionally, if processing module 901 determines scheduling of resource granularity according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI,

If processing module 901 determines scheduling of resource granularity according to the CCE aggregation level and system bandwidth of the Physical Downlink Control Channel of carrying DCI,

If processing module 901 determines scheduling of resource granularity according to the CCE aggregation level and short TTI data transmission available bandwidth of the Physical Downlink Control Channel of carrying DCI,

The distinct symbols that short TTI data transmission resources occupy in the time domain occupy the frequency domain resource of same band on frequency domain；

Short TTI data transmission resources occupy N number of symbol in the time domain, and N is positive integer, and when cyclic prefix CP is long CP, N is not more than 6, and when CP is common CP, N is not more than 7.

Optionally, scheduling of resource granularity includes: frequency domain resource scheduling granularity and time-domain resource scheduling granularity；

Frequency domain resource scheduling granularity is minimum frequency domain resource allocation unit when base station schedules terminals equipment carries out the transmission of short TTI data, including at least one RB；

Time-domain resource scheduling granularity is minimum time-domain resource allocation unit when base station schedules terminals equipment carries out the transmission of short TTI data, including at least one symbol.

Optionally, DCI includes: the Length Indication information for being used to indicate the symbol numbers X that short TTI data transmission resources occupy in the time domain；

Terminal device is according to scheduling of resource granularity and DCI, determine short TTI data transmission resources, it include: terminal device according to Length Indication information and time-domain resource scheduling granularity, determining that short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, and X is positive integer；

Reference symbol are as follows: k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI or k-th of symbol after the occupied last symbol of DCI, k is positive integer.

Optionally, DCI includes: and is used to indicate short TTI data transmission resources to be occupied in the time domain with the information for relative position of several symbols relative to reference symbol that reference symbol is starting；

Processing module 901 is specifically used for: information and time-domain resource depending on the relative position dispatches granularity, and determining that short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting.

Optionally, the information bit of short TTI data transmission resources is used to indicate in DCI as sky；

Processing module 901 is specifically used for:

Determining that short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting, several symbols of occupancy are that the number of several symbols continuous and occupy is identical as symbol numbers included by time-domain resource granularity；

Optionally, DCI includes: the start position information for being used to indicate the frequency domain initial position of short TTI data transmission resources；

Processing module 901 is specifically used for:

According to frequency domain resource scheduling granularity and start position information, the frequency domain initial position of short TTI data transmission resources is determined, and the resource for determining that short TTI data transmission resources occupy on frequency domain is big as frequency domain resource scheduling granularity；And

Determine that the primary sign that short TTI data transmission resources occupy in the time domain is reference symbol；Reference symbol are as follows: k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI or k-th of symbol after the occupied last symbol of DCI, k is positive integer.

Processing module 901 is specifically used for:

Determine that the primary sign that short TTI data transmission resources occupy in the time domain is reference symbol；Reference symbol are as follows: k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

According to start position information, determines that short TTI data transmission resources occupy on frequency domain and originated with frequency domain Position is the resource of starting, then the resource occupied is big as frequency domain resource scheduling granularity.

Optionally, DCI includes: the bandwidth information of the start position information and short TTI data transmission resources that are used to indicate the frequency domain initial position of short TTI data transmission resources；And it is used to indicate the Length Indication information for the symbolic number X that short TTI data transmission resources occupy in the time domain, X is positive integer；

Processing module 901 is specifically used for:

Granularity and Length Indication information are dispatched according to time-domain resource, determining that short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, reference symbol are as follows: k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI, or k-th of symbol after the occupied last symbol of DCI, k are positive integer；And

According to frequency domain resource scheduling granularity, start position information and bandwidth information, determine that short TTI data transmission resources occupy resource indicated by the bandwidth information that frequency domain initial position starts on frequency domain.

Optionally, transceiver module 902 is also used to:

Before receiving the DCI that base station is sent, the available short TTI data transmission resources of terminal device that base station is notified by high-level signaling are received, available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or short TTI data transmit the time-domain resource that can be occupied；

Optionally, processing module 901 is specifically used for:

The information bit of DCI is determined according to scheduling of resource granularity；

The blind examination on Physical Downlink Control Channel according to the information bit of DCI；

DCI is obtained by blind examination.

Optionally, processing module 901 is specifically used for:

On Physical Downlink Control Channel, blind examination is carried out according to the sequence of symbol.

Other the optional implementations for the terminal device that embodiment three provides can refer to the terminal device 102 in the wireless communication system of the offer of embodiment one.

Specifically, processing module 901 can be used for executing the operation of transmitting-receiving performed by terminal device 102 for executing processing operation performed by terminal device 102, transceiver module 902.

Wherein, the adoptable wireless communication standard of terminal device that embodiment three provides can refer to embodiment one Described in various wireless communication standards.

Such as: for LTE systems such as TDD LTE, FDD LTE or LTE-A, terminal device can be UE；For TD-SCDMA system or WCDMA system, terminal device can be UE；For gsm system, terminal device is mobile station (Mobile Station, MS)；For WiFi system, terminal device can be website (Station, STA).

The process flow that the terminal device that embodiment three provides carries out data transmission under the scheduling of base station can refer to process shown in Fig. 2.Wherein, terminal device determines scheduling of resource granularity, according to scheduling of resource granularity and the DCI received, determines data transmission resources, carries out data transmission on determining data transmission resources with base station.The processing of terminal device 102 may include step S202, step S203, step S206, step S207, step S208 and step S209.The scheme of each step can distinguish step corresponding in reference implementation example one, and which is not described herein again.

In above steps, step S203, step S206, step S207 and step S208 can be executed by processing module 901；Step S202, step S206 and step S209 can be executed by transceiver module 902.Optionally, transceiver module 902 can execute each step under the control of processing module 901.After the downlink data that step S209 transceiver module 902 receives base station transmission, downlink data can be given to processing module 901 to be further processed, such as: protocol processes of other layers such as the processing of the physical layer protocol such as channel decoding, demodulation and transport layer, application layer etc..

Wherein, the data transmission that terminal device carries out can be uplink or downlink transfer.

Wherein, processing module 901 determines scheduling of resource granularity, determines data transmission resources, can refer to the realization of terminal device 102 in embodiment one, details are not described herein.

Figure 10 shows a kind of optional implementation of terminal device, wherein processing module 901 can be realized that transceiver module 902 can be realized by the transceiver 1002 in Figure 10 by the processor 1001 in Figure 10.Wherein, bus architecture may include the bus and bridge of any number of interconnection, and the various circuits for the memory that the one or more processors specifically represented by processor 1001 and memory 1003 represent link together.Bus architecture can also link together various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like, and these are all it is known in the art, and therefore, it will not be further described herein.Bus interface provides interface.Transceiver 1002 can be multiple element, that is, include transmitter and Receiver provides the unit for communicating over a transmission medium with various other devices.For different terminal devices, user interface 1004, which can also be, external the interface for needing equipment is inscribed, and the equipment of connection includes but is not limited to keypad, display, loudspeaker, microphone, control stick etc..

Figure 11 shows the optional implementation of another kind of terminal device, wherein processing module 901 can be realized that transceiver module 902 can be realized by the transceiver 1102 in Figure 11 by the processor 1101 in Figure 11.

[example IV]

As shown in figure 12, the first data transmission method that example IV provides includes the following steps:

S1201: base station determines scheduling of resource granularity；

S1202: base station according to scheduling of resource granularity, determine terminal device carry out data transmission used in short transmission time interval TTI data transmission resources, short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain；

S1203: base station sends Downlink Control Information DCI to terminal device, and DCI is used to indicate short TTI data transmission resources；

S1204: base station is carried out data transmission using the short TTI data transmission resources with terminal.

Optionally, base station determines scheduling of resource granularity using one of following manner:

Base station determines scheduling of resource granularity according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI；

Base station determines scheduling of resource granularity according to system bandwidth；

Available bandwidth is transmitted according to short TTI data and determines scheduling of resource granularity in base station；

Base station determines scheduling of resource granularity according to the CCE aggregation level and system bandwidth of the Physical Downlink Control Channel of carrying DCI；And

Base station determines scheduling of resource granularity according to the CCE aggregation level and short TTI data transmission available bandwidth of the Physical Downlink Control Channel of carrying DCI；

Optionally, if base station determines scheduling of resource granularity according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI,

If base station determines scheduling of resource granularity according to the CCE aggregation level and system bandwidth of the Physical Downlink Control Channel of carrying DCI,

If base station determines scheduling of resource granularity according to the CCE aggregation level and short TTI data transmission available bandwidth of the Physical Downlink Control Channel of carrying DCI,

Base station determines short TTI data transmission resources according to scheduling of resource granularity, comprising:

Granularity is dispatched according to time-domain resource in base station, determines that the symbol that short TTI data transmission resources occupy in the time domain, the distinct symbols in symbol occupied in the time domain occupy the frequency domain resource of same band on frequency domain；

Optionally, scheduling of resource granularity includes: frequency domain resource scheduling granularity, and frequency domain resource scheduling granularity is minimum frequency domain resource allocation unit when base station schedules terminals equipment carries out the transmission of short TTI data, including extremely A few RB；

Base station determines the resource that short TTI data transmission resources occupy on frequency domain according to frequency domain resource scheduling granularity, and short TTI data transmission resources occupy N number of symbol in the time domain, N is positive integer, and when cyclic prefix CP is long CP, N is not more than 6, when CP is common CP, N is not more than 7.

Granularity is dispatched according to time-domain resource in base station, determines the symbol that short TTI data transmission resources occupy in the time domain；And

Base station determines the resource that short TTI data transmission resources occupy on frequency domain according to frequency domain resource scheduling granularity.

Optionally, granularity is dispatched according to time-domain resource in base station, determines the symbol that short TTI data transmission resources occupy in the time domain, comprising: it take reference symbol as the continuous X symbol of starting that base station, which determines that data transmission resources occupy in the time domain, X is positive integer, and X is the integral multiple that time-domain resource dispatches granularity；

DCI includes: the Length Indication information for being used to indicate X, and Length Indication information is that base station is generated according to time-domain resource scheduling granularity.

Optionally, base station granularity is dispatched according to time-domain resource, determine the symbol that short TTI data transmission resources occupy in the time domain, it include: that determine that short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting for base station, the symbolic number of occupancy is the integral multiple that time-domain resource dispatches granularity；

Reference symbol are as follows: after k-th of the symbol or the occupied last symbol of DCI after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI K-th of symbol, k is positive integer；

DCI includes: the information for being used to indicate several symbols relative to the relative position of reference symbol, and the information of relative position is that granularity is dispatched according to time-domain resource in base station and relative position generates.

Optionally, base station granularity is dispatched according to time-domain resource, determine the symbol that short TTI data transmission resources occupy in the time domain, include: base station determine short TTI data transmission resources occupy in the time domain with reference symbol be starting several symbols, wherein, several symbols occupied are continuous, and the number of several symbols occupied is identical as symbol numbers included by time-domain resource granularity；

Optionally, base station determines the resource that short TTI data transmission resources occupy on frequency domain, comprising: the resource that base station determines that short TTI data transmission resources occupy on frequency domain is big as frequency domain resource scheduling granularity according to frequency domain resource scheduling granularity；

Base station is according to scheduling of resource granularity, determine data transmission resources, further include: base station determines that the primary sign that short TTI data transmission resources occupy in the time domain is reference symbol, reference symbol is k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI, or k-th of symbol after the occupied last symbol of DCI, k are positive integer；

DCI includes: the information for being used to indicate the frequency domain initial position of short TTI data transmission resources, and the information of frequency domain initial position is that base station is generated according to frequency domain resource scheduling granularity.

Optionally, base station granularity is dispatched according to time-domain resource, determine the symbol that short TTI data transmission resources occupy in the time domain, comprising: base station determines that short TTI data transmission resources occupy continuous symbol in the time domain, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes；

Base station determines the resource that short TTI data transmission resources occupy on frequency domain, comprising: the resource that base station determines that short TTI data transmission resources occupy on frequency domain is big as frequency domain resource scheduling granularity according to frequency domain resource scheduling granularity；

Base station determines short TTI data transmission resources according to scheduling of resource granularity, further includes: base station determines The primary sign that data transmission resources occupy in the time domain is reference symbol；

Optionally, granularity is dispatched according to time-domain resource in base station, determines the symbol that short TTI data transmission resources occupy in the time domain, comprising: it take reference symbol as the continuous X symbol of starting that base station, which determines that short TTI data transmission resources occupy in the time domain, and X is positive integer；

Base station determines the resource that short TTI data transmission resources occupy on frequency domain according to frequency domain resource scheduling granularity, comprising: base station determines that short TTI data transmission resources are occupied on frequency domain with the resource for the nominated bandwidth that frequency domain initial position is starting；

DCI includes: the bandwidth information of the start position information and nominated bandwidth that are used to indicate frequency domain initial position, and is used to indicate the Length Indication information of X；Information, the bandwidth information of frequency domain initial position are that base station is generated according to frequency domain resource scheduling granularity, and Length Indication information is that base station is generated according to time-domain resource scheduling granularity.

Optionally, before base station determines scheduling of resource granularity, further includes: base station determination meets at least one of following condition:

System bandwidth is greater than the bandwidth threshold of setting；And

Optionally, before base station sends DCI to terminal device, further includes:

Base station notifies that the available short TTI data transmission resources of terminal device, available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or data transmit the time domain that can be occupied by high-level signaling Resource；

Optionally, base station sends DCI, comprising:

Base station sends DCI on the short TTI data transmission resources that DCI is indicated.

Optionally, base station sends DCI on the short TTI data transmission resources that DCI is indicated, comprising:

When sending DCI, first sign-on mapping of the short TTI data transmission resources indicated from DCI is further continued for being mapped to next symbol when taking first symbol for base station.

Other optional implementations of this method can refer to the processing of the base station 101 in the wireless communication system of the offer of embodiment one, and details are not described herein.

[embodiment five]

As shown in figure 13, second of data transmission method that embodiment five provides includes the following steps:

S1301: terminal device determines scheduling of resource granularity；

S1302: terminal device receives the Downlink Control Information DCI that base station is sent, DCI be used to indicate terminal device carry out data transmission used in short TTI data transmission resources, short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain；

S1303: terminal device determines short TTI data transmission resources used in carrying out data transmission according to scheduling of resource granularity and DCI；

S1304: terminal device is carried out data transmission using the short TTI data transmission resources with base station.

Optionally, terminal device determines scheduling of resource granularity using one of following manner:

Terminal device determines scheduling of resource granularity according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI；

Terminal device determines scheduling of resource granularity according to system bandwidth；

Terminal device transmits available bandwidth according to short TTI data and determines scheduling of resource granularity；

Terminal device determines scheduling of resource granularity according to the CCE aggregation level and system bandwidth of the Physical Downlink Control Channel of carrying DCI；And

Terminal device determines scheduling of resource granularity according to the CCE aggregation level and short TTI data transmission available bandwidth of the Physical Downlink Control Channel of carrying DCI；

Optionally, if terminal device determines scheduling of resource granularity according to the CCE aggregation level of the Physical Downlink Control Channel of carrying DCI,

If terminal device determines scheduling of resource granularity according to the CCE aggregation level and system bandwidth of the Physical Downlink Control Channel of carrying DCI,

If terminal device determines scheduling of resource granularity according to the CCE aggregation level and short TTI data transmission available bandwidth of the Physical Downlink Control Channel of carrying DCI,

Terminal device is according to scheduling of resource granularity and DCI, determine short TTI data transmission resources, it include: the information and time-domain resource scheduling granularity of terminal device depending on the relative position, determining that short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting.

Terminal device determines short TTI data transmission resources according to scheduling of resource granularity and DCI, comprising:

It take reference symbol as several symbols of starting that terminal device, which determines that short TTI data transmission resources occupy in the time domain, several symbols of occupancy are that the number of several symbols continuous and occupy is identical as symbol numbers included by time-domain resource granularity；

Terminal device determines the frequency domain initial position of short TTI data transmission resources according to frequency domain resource scheduling granularity and start position information, and the resource for determining that short TTI data transmission resources occupy on frequency domain is big as frequency domain resource scheduling granularity；And

Terminal device determines that the primary sign that short TTI data transmission resources occupy in the time domain is reference symbol；Reference symbol are as follows: k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI or k-th of symbol after the occupied last symbol of DCI, k is positive integer.

Terminal device determines that short TTI data transmit used data transmission resources according to scheduling of resource granularity and DCI, comprising:

Terminal device determines that short TTI data transmission resources occupy continuous symbol in the time domain, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes；

Terminal device determines that the primary sign that short TTI data transmission resources occupy in the time domain is reference symbol；Reference symbol are as follows: the after first symbol, the last symbol that DCI is occupied, k-th of symbol after occupied first symbol of DCI or the occupied last symbol of DCI that DCI is occupied K symbol, k are positive integer；And

Terminal device is according to start position information, and determining that short TTI data transmission resources occupy on frequency domain take frequency domain initial position as the resource of starting, then the resource occupied is big as frequency domain resource scheduling granularity.

Terminal device dispatches granularity and Length Indication information according to time-domain resource, determining that short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, reference symbol are as follows: k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of DCI, or k-th of symbol after the occupied last symbol of DCI, k are positive integer；And

Terminal device determines that short TTI data transmission resources occupy resource indicated by the bandwidth information that frequency domain initial position starts on frequency domain according to frequency domain resource scheduling granularity, start position information and bandwidth information.

Optionally, before receiving the DCI that base station is sent, further includes:

The available short TTI data transmission resources of terminal device that base station is notified by high-level signaling are received, available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or short TTI data transmit the time-domain resource that can be occupied；

Optionally, terminal device receives DCI, comprising:

Terminal device determines the information bit of DCI according to scheduling of resource granularity；

Terminal device is according to the blind examination on the Physical Downlink Control Channel of carrying DCI of the information bit of DCI；

Terminal device obtains DCI by blind examination.

Optionally, terminal device carries out blind examination, comprising:

Terminal device carries out blind examination on the Physical Downlink Control Channel of carrying DCI, according to the sequence of symbol.

Other optional implementations of this method can refer to the end in the wireless communication system of the offer of embodiment one The processing of end equipment 102, details are not described herein.

In the embodiment of the present invention, base station according to scheduling of resource granularity, determine dispatch terminal equipment carry out data transmission using data transmission resources, by scheduling of resource granularity, it can be achieved that the flexible configuration of data transmission resources.

Further, terminal device data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain, thereby realize the scheduling of data transmission of the TTI less than 1 subframe lengths or less than 1ms.

Further, due to determining data transmission resources according to scheduling of resource granularity, the information of the length and initial position that are used to indicate data transmission resources can be determined by scheduling of resource granularity, in this way when scheduling of resource granularity is larger, can reduce the bit number of instruction information.

And, since data transmission resources use the format of some fixations, such as: primary sign is reference symbol, occupy continuous symbol, or the distinct symbols for being occupied in time domain, the frequency domain resource of the same band occupied on frequency domain is further reduced the information bit for being used to indicate data transmission resources.

It is 20MHz (including 100 RB) with downlink system bandwidth, frequency domain dispatching granularity is 20RB, for time-domain resource dispatches granularity no more than the situation of 7 symbols, frequency domain resource scheduling granularity and time-domain resource scheduling granularity are being determined respectively, and in the case where according to determining scheduling of resource granularity distributing data transmission resources, the data transmission resources for only needing 8bit instruction distribution, greatly reduce the RA information bit data in DCI.

For the transmission of short TTI data, compared with current TTI is equal to the data transmission of 1 subframe, the DCI for needing to transmit in unit time increases, if the RA information bit data for needing to transmit in the unit time will increase dramatically still according to original data transmission resources method of salary distribution.And the method for salary distribution of data transmission resources provided in an embodiment of the present invention is used, RA information bit can be greatly reduced, the expense of RA information is reduced.

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program product.Therefore, the form of complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the present invention.Moreover, it wherein includes computer-usable storage medium (the including but not limited to disk of computer usable program code that the present invention, which can be used in one or more, Memory, CD-ROM, optical memory etc.) on the form of computer program product implemented.

The present invention be referring to according to the method for the embodiment of the present invention, the flowchart and/or the block diagram of equipment (system) and computer program product describes.It should be understood that the combination of process and/or box in each flow and/or block and flowchart and/or the block diagram that can be realized by computer program instructions in flowchart and/or the block diagram.These computer program instructions be can provide to the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate a machine, so that generating by the instruction that computer or the processor of other programmable data processing devices execute for realizing the device for the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, to be able to guide in computer or other programmable data processing devices computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates the manufacture including command device, which realizes the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that series of operation steps are executed on a computer or other programmable device to generate computer implemented processing, thus the step of instruction executed on a computer or other programmable device is provided for realizing the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

Although preferred embodiments of the present invention have been described, once a person skilled in the art knows basic creative concepts, then additional changes and modifications can be made to these embodiments.So it includes preferred embodiment and all change and modification for falling into the scope of the invention that the following claims are intended to be interpreted as.

Obviously, those skilled in the art can carry out various modification and variations without departing from the spirit and scope of the embodiment of the present invention to the embodiment of the present invention.If then the present invention is also intended to include these modifications and variations in this way, these modifications and variations of the embodiment of the present invention are within the scope of the claims of the present invention and its equivalent technology.

Claims

A kind of base station characterized by comprising

Processing module, for determining scheduling of resource granularity；And according to the scheduling of resource granularity, determine terminal device carry out data transmission used in short transmission time interval TTI data transmission resources, the short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain；

Transceiver module, for sending Downlink Control Information DCI to the terminal device, the DCI is used to indicate the short TTI data transmission resources；

The transceiver module is also used for the short TTI data transmission resources and carries out data transmission with the terminal device.
Base station as described in claim 1, which is characterized in that the processing module is specifically used for: the scheduling of resource granularity is determined using one of following manner:

The scheduling of resource granularity is determined according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI；

The scheduling of resource granularity is determined according to system bandwidth；

Available bandwidth, which is transmitted, according to short TTI data determines the scheduling of resource granularity；

The scheduling of resource granularity is determined according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and system bandwidth；And

The scheduling of resource granularity is determined according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
Base station as claimed in claim 2, which is characterized in that if the processing module determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI,

The CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the scheduling of resource granularity is bigger.
Base station as claimed in claim 2, which is characterized in that the scheduling of resource granularity includes time domain Scheduling of resource granularity, the time-domain resource scheduling granularity dispatch the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the processing module determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI,

System bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

If system bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.
Base station as claimed in claim 2, it is characterized in that, the scheduling of resource granularity includes time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the processing module determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth,

The short TTI data transmission available bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

If the short TTI data transmission available bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.
Base station as claimed in any one of claims 1 to 5, which is characterized in that

The scheduling of resource granularity includes: time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

The processing module is specifically used for:

Granularity is dispatched according to the time-domain resource, determines that the symbol that the short TTI data transmission resources occupy in the time domain, the distinct symbols in the symbol occupied in the time domain occupy the frequency domain resource of same band on frequency domain；

The same band refers to: identical system bandwidth, identical short TTI data transmission available bandwidth or identical specific bandwidth；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that short TTI data transmission resources can occupy.
Base station as claimed in any one of claims 1 to 5, which is characterized in that

The scheduling of resource granularity includes: frequency domain resource scheduling granularity, and the frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；

The processing module is specifically used for:

According to the frequency domain resource scheduling granularity, determine the resource that the short TTI data transmission resources occupy on frequency domain, the short TTI data transmission resources occupy N number of symbol in the time domain, the N is positive integer, when cyclic prefix CP is long CP, the N is not more than 6, and when CP is common CP, the N is not more than 7.
Base station as claimed in any one of claims 1 to 5, which is characterized in that the scheduling of resource granularity includes: frequency domain resource scheduling granularity and time-domain resource scheduling granularity；The frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；The time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

The processing module is specifically used for:

Granularity is dispatched according to the time-domain resource, determines the symbol that the short TTI data transmission resources occupy in the time domain；And

According to the frequency domain resource scheduling granularity, the resource that the short TTI data transmission resources occupy on frequency domain is determined.
Base station as claimed in claim 6, which is characterized in that

The processing module is specifically used for: determining that the data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, and the X is positive integer, and X is the integral multiple that the time-domain resource dispatches granularity；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: the Length Indication information for being used to indicate the X, and the Length Indication information is The processing module dispatches what granularity generated according to the time-domain resource.
Base station as claimed in claim 6, which is characterized in that

The processing module is specifically used for: determining that the short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting, and the symbolic number of occupancy is the integral multiple that the time-domain resource dispatches granularity；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: to be used to indicate the information of several symbols relative to the relative position of the reference symbol, and the information of the relative position is that the processing module dispatches granularity according to the time-domain resource and the relative position generates.
Base station as claimed in claim 6, which is characterized in that

The processing module is specifically used for: determining that the short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting, wherein, several the described symbols occupied are continuous, and the number of several symbols occupied is identical as symbol numbers included by the time-domain resource granularity；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The information bit of the short TTI data transmission resources is used to indicate in the DCI as sky.
Base station as claimed in claim 7, which is characterized in that the processing module is specifically used for:

The resource for determining that the short TTI data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity；And

Determine that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol, the reference symbol is k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: the letter for being used to indicate the frequency domain initial position of the short TTI data transmission resources Breath, the information of the frequency domain initial position is that the processing module is generated according to the frequency domain resource scheduling granularity.
Base station as claimed in claim 8, which is characterized in that the processing module is specifically used for:

Determine that the short TTI data transmission resources occupy continuous symbol in the time domain, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes；

The resource for determining that the short TTI data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity；And

Determine that the primary sign that the data transmission resources occupy in the time domain is reference symbol；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: the information for being used to indicate the frequency domain initial position of the short TTI data transmission resources, and the information of the frequency domain initial position is that the processing module is generated according to the frequency domain resource scheduling granularity.
Base station as claimed in claim 8, which is characterized in that the processing module is specifically used for:

Determining that the short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, and the X is positive integer；The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

Determine that the short TTI data transmission resources are occupied on frequency domain with the resource for the nominated bandwidth that frequency domain initial position is starting；

The DCI includes: the bandwidth information of the start position information and the nominated bandwidth that are used to indicate the frequency domain initial position, and is used to indicate the Length Indication information of the X；Information, the bandwidth information of the frequency domain initial position are that the processing module is generated according to the frequency domain resource scheduling granularity, and the Length Indication information is that the processing module is generated according to time-domain resource scheduling granularity.
Such as the described in any item base stations of claim 1~14, which is characterized in that the processing module is also For: before determining the scheduling of resource granularity, determination meets at least one of following condition:

The delay requirement of the currently used business of the terminal device is less than the delay threshold of setting；

System bandwidth is greater than the bandwidth threshold of setting；And

Resource availability is greater than the resource availability threshold value of setting in system bandwidth.
Such as the described in any item base stations of claim 1~15, which is characterized in that the transceiver module is also used to:

Before sending DCI to the terminal device, notify that the available short TTI data transmission resources of the terminal device, the available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or the data transmit the time-domain resource that can be occupied by high-level signaling；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
Such as the described in any item base stations of claim 1~16, which is characterized in that the transceiver module is specifically used for:

The DCI is sent on the short TTI data transmission resources of DCI instruction.
Base station as claimed in claim 17, which is characterized in that the transceiver module is specifically used for:

When sending the DCI, first sign-on mapping of the short TTI data transmission resources indicated from the DCI is further continued for being mapped to next symbol when taking first symbol.
A kind of terminal device characterized by comprising

Processing module, for determining scheduling of resource granularity；

Transceiver module, for receiving the Downlink Control Information DCI of base station transmission, the DCI be used to indicate the terminal device carry out data transmission used in short TTI data transmission resources, the short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain；

According to the scheduling of resource granularity and the DCI, determine that the terminal device carries out the data and transmits the used short TTI data transmission resources；And

The data transmission is carried out using the short TTI data transmission resources and the base station.
Terminal device as claimed in claim 19, which is characterized in that the processing module is specifically used for: the scheduling of resource granularity is determined using one of following manner:

The scheduling of resource granularity is determined according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI；

The scheduling of resource granularity is determined according to system bandwidth；

Available bandwidth, which is transmitted, according to short TTI data determines the scheduling of resource granularity；

The scheduling of resource granularity is determined according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and system bandwidth；And

The scheduling of resource granularity is determined according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
Terminal device as claimed in claim 20, which is characterized in that if the processing module determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI,

The CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the scheduling of resource granularity is bigger.
Terminal device as claimed in claim 20, it is characterized in that, the scheduling of resource granularity includes time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the processing module determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI,

System bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

If system bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.
Terminal device as claimed in claim 20, it is characterized in that, the scheduling of resource granularity includes time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the processing module is according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI The scheduling of resource granularity is determined with short TTI data transmission available bandwidth, then

Short TTI data transmission available bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

If short TTI data transmission available bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.
Such as the described in any item terminal devices of claim 19~23, which is characterized in that

The scheduling of resource granularity includes: time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

The distinct symbols that the short TTI data transmission resources occupy in the time domain occupy the frequency domain resource of same band on frequency domain；

The same band refers to: identical system bandwidth, identical short TTI data transmission available bandwidth or identical specific bandwidth；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
Such as the described in any item terminal devices of claim 19~23, which is characterized in that

The scheduling of resource granularity includes: frequency domain resource scheduling granularity, and the frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；

The short TTI data transmission resources occupy N number of symbol in the time domain, and the N is positive integer, and when cyclic prefix CP is long CP, the N is not more than 6, and when CP is common CP, the N is not more than 7.
Such as the described in any item terminal devices of claim 19~23, which is characterized in that the scheduling of resource granularity includes: frequency domain resource scheduling granularity and time-domain resource scheduling granularity；

The frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；

The time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station.
Terminal device as claimed in claim 24, which is characterized in that

The DCI includes: the Length Indication information for being used to indicate the symbol numbers X that the short TTI data transmission resources occupy in the time domain；

The terminal device is according to the scheduling of resource granularity and the DCI, determine the short TTI data transmission resources, it include: the terminal device according to the Length Indication information and time-domain resource scheduling granularity, determining that the short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, and the X is positive integer；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer.
Terminal device as claimed in claim 24, which is characterized in that

The DCI includes: to be used to indicate the short TTI data transmission resources to be occupied in the time domain with the information for relative position of several symbols relative to the reference symbol that reference symbol is starting；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The processing module is specifically used for: information and the time-domain resource depending on that relative position dispatches granularity, determines that the short TTI data transmission resources are occupied in the time domain with the reference symbol as several symbols described in starting.
Terminal device as claimed in claim 24, which is characterized in that the information bit of the short TTI data transmission resources is used to indicate in the DCI as sky；

The processing module is specifically used for:

Determining that the short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting, several described symbols of occupancy are that the number of several symbols that are continuous and occupying is identical as symbol numbers included by the time-domain resource granularity；

The reference symbol are as follows: shared by k-th of the symbol or the DCI after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI K-th of symbol after last symbol, k are positive integer.
Terminal device as claimed in claim 25, which is characterized in that

The DCI includes: the start position information for being used to indicate the frequency domain initial position of the short TTI data transmission resources；

The processing module is specifically used for:

According to the frequency domain resource scheduling granularity and the start position information, the frequency domain initial position of the short TTI data transmission resources is determined, and the resource for determining that the short TTI data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity；And

Determine that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol；The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer.
Terminal device as claimed in claim 26, which is characterized in that

The DCI includes: the start position information for being used to indicate the frequency domain initial position of the short TTI data transmission resources；

The processing module is specifically used for:

Determine that the short TTI data transmission resources occupy continuous symbol in the time domain, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes；

Determine that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol；The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

According to the start position information, determining that the short TTI data transmission resources occupy on frequency domain take the frequency domain initial position as the resource of starting, then the resource occupied is big as the frequency domain resource scheduling granularity.
Terminal device as claimed in claim 26, which is characterized in that

The DCI includes: for being used to indicate the frequency domain initial position of the short TTI data transmission resources The bandwidth information of beginning location information and the short TTI data transmission resources；And it is used to indicate the Length Indication information for the symbolic number X that the short TTI data transmission resources occupy in the time domain, the X is positive integer；

The processing module is specifically used for:

Granularity and the Length Indication information are dispatched according to the time-domain resource, determining that the short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, the reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

According to the frequency domain resource scheduling granularity, the start position information and the bandwidth information, determine that the short TTI data transmission resources occupy resource indicated by the bandwidth information that the frequency domain initial position starts on frequency domain.
Such as the described in any item terminal devices of claim 19~32, which is characterized in that the transceiver module is also used to:

Before receiving the DCI that the base station is sent, the available short TTI data transmission resources of the terminal device that the base station is notified by high-level signaling are received, the available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or short TTI data transmit the time-domain resource that can be occupied；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
A kind of data transmission method characterized by comprising

Base station determines scheduling of resource granularity；

The base station according to the scheduling of resource granularity, determine terminal device carry out data transmission used in short transmission time interval TTI data transmission resources, the short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain；

The base station sends Downlink Control Information DCI to the terminal device, and the DCI is used to indicate the short TTI data transmission resources；

The base station is carried out data transmission using the short TTI data transmission resources with the terminal device.
Method as claimed in claim 34, which is characterized in that the base station determines the scheduling of resource granularity using one of following manner:

The base station determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI；

The base station determines the scheduling of resource granularity according to system bandwidth；

Available bandwidth is transmitted according to short TTI data and determines the scheduling of resource granularity in the base station；

The base station determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI；And

The base station determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
Method as claimed in claim 35, which is characterized in that if the base station determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI,

The CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the scheduling of resource granularity is bigger.
Method as claimed in claim 35, it is characterized in that, the scheduling of resource granularity includes time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the base station determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI,

System bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

If system bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.
Method as claimed in claim 35, it is characterized in that, the scheduling of resource granularity includes time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the base station determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth,

The short TTI data transmission available bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

If the short TTI data transmission available bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.
Such as the described in any item methods of claim 34~38, which is characterized in that

The scheduling of resource granularity includes: time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

The base station determines the short TTI data transmission resources according to the scheduling of resource granularity, comprising:

Granularity is dispatched according to the time-domain resource in the base station, determines that the symbol that the short TTI data transmission resources occupy in the time domain, the distinct symbols in the symbol occupied in the time domain occupy the frequency domain resource of same band on frequency domain；

The same band refers to: identical system bandwidth, identical short TTI data transmission available bandwidth or identical specific bandwidth；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
Such as the described in any item methods of claim 34~38, which is characterized in that

The scheduling of resource granularity includes: frequency domain resource scheduling granularity, and the frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；

The base station determines the short TTI data transmission resources according to the scheduling of resource granularity, comprising:

The base station is according to the frequency domain resource scheduling granularity, determine the resource that the short TTI data transmission resources occupy on frequency domain, the short TTI data transmission resources occupy N number of symbol in the time domain, the N is positive integer, when cyclic prefix CP is long CP, the N is not more than 6, and when CP is common CP, the N is not more than 7.
Such as the described in any item methods of claim 34~38, which is characterized in that the scheduling of resource Granularity includes: frequency domain resource scheduling granularity and time-domain resource scheduling granularity；The frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；The time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

The base station determines the short TTI data transmission resources according to the scheduling of resource granularity, comprising:

Granularity is dispatched according to the time-domain resource in the base station, determines the symbol that the short TTI data transmission resources occupy in the time domain；And

The base station determines the resource that the short TTI data transmission resources occupy on frequency domain according to the frequency domain resource scheduling granularity.
Method as claimed in claim 39, which is characterized in that

The base station granularity is dispatched according to the time-domain resource, determine the symbol that the short TTI data transmission resources occupy in the time domain, include: the base station determine the data transmission resources occupy in the time domain with reference symbol be starting continuous X symbol, the X is positive integer, and X is the integral multiple that the time-domain resource dispatches granularity；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: the Length Indication information for being used to indicate the X, and the Length Indication information is that the base station is generated according to time-domain resource scheduling granularity.
Method as claimed in claim 39, which is characterized in that

The base station granularity is dispatched according to the time-domain resource, determine the symbol that the short TTI data transmission resources occupy in the time domain, it include: that determine that the short TTI data transmission resources occupy in the time domain take reference symbol as several symbols of starting for the base station, the symbolic number of occupancy is the integral multiple that the time-domain resource dispatches granularity；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: to be used to indicate the information of several symbols relative to the relative position of the reference symbol, and the information of the relative position is that granularity is dispatched according to the time-domain resource in the base station and the relative position generates.
Method as claimed in claim 39, which is characterized in that

The base station granularity is dispatched according to the time-domain resource, determine the symbol that the short TTI data transmission resources occupy in the time domain, include: the base station determine the short TTI data transmission resources occupy in the time domain with reference symbol be starting several symbols, wherein, several the described symbols occupied are continuous, and the number of several symbols occupied is identical as symbol numbers included by the time-domain resource granularity；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The information bit of the short TTI data transmission resources is used to indicate in the DCI as sky.
Method as claimed in claim 40, which is characterized in that

The base station is according to the frequency domain resource scheduling granularity, determine the resource that the short TTI data transmission resources occupy on frequency domain, comprising: the resource that the base station determines that the short TTI data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity；

The base station is according to the scheduling of resource granularity, determine the data transmission resources, further include: the base station determines that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol, the reference symbol is k-th of symbol after first symbol of DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: the information for being used to indicate the frequency domain initial position of the short TTI data transmission resources, and the information of the frequency domain initial position is that the base station is generated according to the frequency domain resource scheduling granularity.
Method as claimed in claim 41, which is characterized in that

Granularity is dispatched according to the time-domain resource in the base station, determines the symbol that the short TTI data transmission resources occupy in the time domain, comprising: the base station determines the short TTI data transmission resources in the time domain Continuous symbol is occupied, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes；

The base station is according to the frequency domain resource scheduling granularity, determine the resource that the short TTI data transmission resources occupy on frequency domain, comprising: the resource that the base station determines that the short TTI data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity；

The base station determines the short TTI data transmission resources according to the scheduling of resource granularity, further includes: the base station determines that the primary sign that the data transmission resources occupy in the time domain is reference symbol；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The DCI includes: the information for being used to indicate the frequency domain initial position of the short TTI data transmission resources, and the information of the frequency domain initial position is that the base station is generated according to the frequency domain resource scheduling granularity.
Method as claimed in claim 41, which is characterized in that

The base station granularity is dispatched according to the time-domain resource, determine the symbol that the short TTI data transmission resources occupy in the time domain, include: the base station determine the short TTI data transmission resources occupy in the time domain with reference symbol be starting continuous X symbol, the X be positive integer；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The base station is according to the frequency domain resource scheduling granularity, determine the resource that the short TTI data transmission resources occupy on frequency domain, comprising: the base station determines that the short TTI data transmission resources are occupied on frequency domain with the resource for the nominated bandwidth that frequency domain initial position is starting；

The DCI includes: the bandwidth information of the start position information and the nominated bandwidth that are used to indicate the frequency domain initial position, and is used to indicate the Length Indication information of the X；Information, the bandwidth information of the frequency domain initial position are that the base station is generated according to the frequency domain resource scheduling granularity, and the Length Indication information is that the base station is generated according to time-domain resource scheduling granularity.
Such as the described in any item methods of claim 34~47, which is characterized in that true in the base station Before the fixed scheduling of resource granularity, further includes: the base station determination meets at least one of following condition:

The delay requirement of the currently used business of the terminal device is less than the delay threshold of setting；

System bandwidth is greater than the bandwidth threshold of setting；And

Resource availability is greater than the resource availability threshold value of setting in system bandwidth.
Such as the described in any item methods of claim 34~48, which is characterized in that before the base station sends DCI to the terminal device, further includes:

The base station notifies that the available short TTI data transmission resources of the terminal device, the available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or the data transmit the time-domain resource that can be occupied by high-level signaling；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
Such as the described in any item methods of claim 34~49, which is characterized in that the base station sends the DCI, comprising:

The base station sends the DCI on the short TTI data transmission resources that the DCI is indicated.
Method as claimed in claim 50, which is characterized in that the base station sends the DCI on the short TTI data transmission resources that the DCI is indicated, comprising:

When sending the DCI, first sign-on mapping of the short TTI data transmission resources indicated from the DCI is further continued for being mapped to next symbol when taking first symbol for the base station.
A kind of data transmission method characterized by comprising

Terminal device determines scheduling of resource granularity；

The terminal device receives the Downlink Control Information DCI that base station is sent, the DCI be used to indicate the terminal device carry out data transmission used in short TTI data transmission resources, the short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain；

The terminal device determines that carrying out the data transmits the used short TTI data transmission resources according to the scheduling of resource granularity and the DCI；

The terminal device carries out the data biography using the short TTI data transmission resources and the base station It is defeated.
Method as claimed in claim 52, which is characterized in that the terminal device determines the scheduling of resource granularity using one of following manner:

The terminal device determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI；

The terminal device determines the scheduling of resource granularity according to system bandwidth；

The terminal device transmits available bandwidth according to short TTI data and determines the scheduling of resource granularity；

The terminal device determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI；And

The terminal device determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
Method as claimed in claim 53, which is characterized in that if the terminal device determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI,

The CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the scheduling of resource granularity is bigger.
Method as claimed in claim 53, it is characterized in that, the scheduling of resource granularity includes time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

If the terminal device determines the scheduling of resource granularity according to the CCE aggregation level and system bandwidth for the Physical Downlink Control Channel for carrying the DCI,

System bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

If system bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.
Method as claimed in claim 53, which is characterized in that the scheduling of resource granularity includes time-domain resource scheduling granularity, and the time-domain resource scheduling granularity is that the terminal device progress is dispatched in the base station Minimum time-domain resource allocation unit when short TTI data are transmitted, including at least one symbol；

If the terminal device determines the scheduling of resource granularity according to the CCE aggregation level for the Physical Downlink Control Channel for carrying the DCI and short TTI data transmission available bandwidth,

Short TTI data transmission available bandwidth is bigger, and the time-domain resource scheduling granularity is smaller；

If short TTI data transmission available bandwidth is fixed, the CCE aggregation level for carrying the Physical Downlink Control Channel of the DCI is higher, and the time-domain resource scheduling granularity is bigger.
Such as the described in any item methods of claim 52~56, which is characterized in that

The scheduling of resource granularity includes: time-domain resource scheduling granularity, and the time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station；

The distinct symbols that the short TTI data transmission resources occupy in the time domain occupy the frequency domain resource of same band on frequency domain；

The same band refers to: identical system bandwidth, identical short TTI data transmission available bandwidth or identical specific bandwidth；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
Such as the described in any item methods of claim 52~56, which is characterized in that

The scheduling of resource granularity includes: frequency domain resource scheduling granularity, and the frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；

The short TTI data transmission resources occupy N number of symbol in the time domain, and the N is positive integer, and when cyclic prefix CP is long CP, the N is not more than 6, and when CP is common CP, the N is not more than 7.
Such as the described in any item methods of claim 52~56, which is characterized in that the scheduling of resource granularity includes: frequency domain resource scheduling granularity and time-domain resource scheduling granularity；

The frequency domain resource scheduling granularity dispatches the minimum frequency domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one RB for the base station；

The time-domain resource scheduling granularity dispatches the minimum time-domain resource allocation unit when terminal device carries out the transmission of short TTI data, including at least one symbol for the base station.
Method as claimed in claim 57, which is characterized in that

The DCI includes: the Length Indication information for being used to indicate the symbol numbers X that the short TTI data transmission resources occupy in the time domain；

The terminal device is according to the scheduling of resource granularity and the DCI, determine the short TTI data transmission resources, it include: the terminal device according to the Length Indication information and time-domain resource scheduling granularity, determining that the short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, and the X is positive integer；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer.
Method as claimed in claim 57, which is characterized in that

The DCI includes: to be used to indicate the short TTI data transmission resources to be occupied in the time domain with the information for relative position of several symbols relative to the reference symbol that reference symbol is starting；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；

The terminal device is according to the scheduling of resource granularity and the DCI, determine the short TTI data transmission resources, include: the information and time-domain resource scheduling granularity of the terminal device depending on that relative position, determines that the short TTI data transmission resources are occupied in the time domain with the reference symbol as several symbols described in starting.
Method as claimed in claim 57, which is characterized in that the information bit of the short TTI data transmission resources is used to indicate in the DCI as sky；

The terminal device determines the short TTI data transmission resources according to the scheduling of resource granularity and the DCI, comprising:

The terminal device determines that the short TTI data transmission resources occupy in the time domain Several symbols of starting, several described symbols of occupancy are that the number of several symbols that are continuous and occupying is identical as symbol numbers included by the time-domain resource granularity；

The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer.
Method as claimed in claim 58, which is characterized in that

The DCI includes: the start position information for being used to indicate the frequency domain initial position of the short TTI data transmission resources；

The terminal device determines the short TTI data transmission resources according to the scheduling of resource granularity and the DCI, comprising:

The terminal device is according to the frequency domain resource scheduling granularity and the start position information, determine the frequency domain initial position of the short TTI data transmission resources, and the resource for determining that the short TTI data transmission resources occupy on frequency domain is big as the frequency domain resource scheduling granularity；And

The terminal device determines that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol；The reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer.
Method as claimed in claim 59, which is characterized in that

The DCI includes: the start position information for being used to indicate the frequency domain initial position of the short TTI data transmission resources；

The terminal device determines that the short TTI data transmit used data transmission resources according to the scheduling of resource granularity and the DCI, comprising:

The terminal device determines that the short TTI data transmission resources occupy continuous symbol in the time domain, and the symbolic number occupied is equal with the symbolic number that time-domain resource scheduling granularity includes；

The terminal device determines that the primary sign that the short TTI data transmission resources occupy in the time domain is reference symbol；The reference symbol are as follows: k-th of symbol or the DCI after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI K-th of symbol after occupied last symbol, k are positive integer；And

The terminal device is according to the start position information, and determining that the short TTI data transmission resources occupy on frequency domain take the frequency domain initial position as the resource of starting, then the resource occupied is big as the frequency domain resource scheduling granularity.
Method as claimed in claim 59, which is characterized in that

The DCI includes: the bandwidth information of the start position information and the short TTI data transmission resources that are used to indicate the frequency domain initial position of the short TTI data transmission resources；And it is used to indicate the Length Indication information for the symbolic number X that the short TTI data transmission resources occupy in the time domain, the X is positive integer；

The terminal device determines the short TTI data transmission resources according to the scheduling of resource granularity and the DCI, comprising:

The terminal device dispatches granularity and the Length Indication information according to the time-domain resource, determining that the short TTI data transmission resources occupy in the time domain take reference symbol as the continuous X symbol of starting, the reference symbol are as follows: k-th of symbol after first symbol of the DCI occupancy, the last symbol of DCI occupancy, occupied first symbol of the DCI, or k-th of symbol after the occupied last symbol of DCI, k is positive integer；And

The terminal device determines that the short TTI data transmission resources occupy resource indicated by the bandwidth information that the frequency domain initial position starts on frequency domain according to the frequency domain resource scheduling granularity, the start position information and the bandwidth information.
Such as the described in any item methods of claim 52~65, which is characterized in that before receiving the DCI that the base station is sent, further includes:

The available short TTI data transmission resources of the terminal device that the base station is notified by high-level signaling are received, the available short TTI data transmission resources include that short TTI data transmission available bandwidth and/or short TTI data transmit the time-domain resource that can be occupied；

Wherein, the short TTI data transmission available bandwidth is the bandwidth that the short TTI data transmission resources can occupy.
A kind of wireless communication system, comprising: base station and terminal device, which is characterized in that

The base station, for determining scheduling of resource granularity, according to the scheduling of resource granularity, determine that terminal device carries out data transmission used short transmission time interval TTI data transmission resources, the short TTI data transmission resources less than the length of 1 subframe or are less than 1ms in the time domain, and Downlink Control Information DCI is sent to the terminal device, the DCI is used to indicate the short TTI data transmission resources, is carried out data transmission using the short TTI data transmission resources with the terminal device；

The terminal device, for determining scheduling of resource granularity, receive the DCI that the base station is sent, according to the determining scheduling of resource granularity and the DCI, it determines the short TTI data transmission resources used in carrying out data transmission, is carried out data transmission using the short TTI data transmission resources with the base station.