CN107295680B - Downlink data scheduling configuration method and system, base station and user equipment - Google Patents

Downlink data scheduling configuration method and system, base station and user equipment Download PDF

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CN107295680B
CN107295680B CN201610203949.0A CN201610203949A CN107295680B CN 107295680 B CN107295680 B CN 107295680B CN 201610203949 A CN201610203949 A CN 201610203949A CN 107295680 B CN107295680 B CN 107295680B
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transmission time
shortened
time interval
subframe
shortened transmission
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CN107295680A (en
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林雁
邓云
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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Abstract

The invention provides a downlink data scheduling configuration method and system, a base station and user equipment. The method comprises the following steps: a base station sends a wireless resource control signaling to user equipment, wherein the wireless resource control signaling carries subframe information for shortening a transmission time interval, and the length of the shortened transmission time interval is less than the length of a subframe; the user equipment acquires configuration information for shortening the transmission time interval in each subframe of which the transmission time interval is shortened according to the subframe information for shortening the transmission time interval by the application; and the user equipment receives a shortened downlink control signaling in the subframe applying the shortened transmission time interval according to the configuration information of the shortened transmission time interval. The invention can support the scheduling of the transmission time interval which is lower than the length of the subframe and provide the service with shorter time delay for the user equipment.

Description

Downlink data scheduling configuration method and system, base station and user equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a downlink data scheduling configuration method and system, a base station, and a user equipment.
Background
Currently, in an LTE (Long Term Evolution) system, a base station schedules transmission of Downlink data and transmission of uplink data through DCI (Downlink Control Information) in a subframe. Each subframe is scheduled once, and TTI (Transmission Time Interval) is defined as one subframe length, i.e., 1 ms. One subframe contains two slots of 0.5ms each, and for a normal CP (Cyclic Prefix), there are 7 symbols per slot. The DCI may be transmitted by a PDCCH (Physical Downlink Control Channel) or an EPDCCH (Enhanced Physical Downlink Control Channel). The PDCCH is transmitted in a control region (control region) of a downlink subframe, wherein the control region is composed of first OFDM (Orthogonal Frequency Division Multiplexing) symbols of the downlink subframe, and generally 1 to 3 symbols are distributed over an entire downlink bandwidth (Band); EPDCCH uses PDSCH (Physical Downlink Shared Channel) resources, which belong to data regions (data regions) and usually occupy only a small part of the entire Downlink bandwidth.
In the process of implementing the invention, the inventor finds that at least the following technical problems exist in the prior art:
in the existing LTE system, a base station only supports scheduling of 14 symbols with TTI of 1ms, and does not support scheduling of shorter TTI, so that it is not possible to provide a service with shorter delay for a UE (User Equipment).
Disclosure of Invention
The downlink data scheduling configuration method and system, the base station and the user equipment can support scheduling with the transmission time interval being lower than the length of the subframe, and provide service with shorter time delay for the user equipment.
In a first aspect, the present invention provides a downlink data scheduling configuration method, including:
a base station sends a wireless resource control signaling to user equipment, wherein the wireless resource control signaling carries subframe information for shortening a transmission time interval, and the length of the shortened transmission time interval is less than the length of a subframe;
the user equipment acquires configuration information for shortening the transmission time interval in each subframe of which the transmission time interval is shortened according to the subframe information for shortening the transmission time interval by the application;
and the user equipment receives a shortened downlink control signaling in the subframe applying the shortened transmission time interval according to the configuration information of the shortened transmission time interval.
Optionally, the obtaining, by the ue, the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by using the application includes: and the user equipment acquires the length and the number of the shortened transmission time intervals in the subframes with the shortened transmission time intervals according to the subframe information for shortening the transmission time intervals by the application and the length of the shortened transmission time intervals agreed by the base station and the user equipment in advance.
Optionally, the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied;
the user equipment acquires the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, and the configuration information comprises the following information: and the user equipment acquires the length and the number of the shortened transmission time intervals in the subframes with the shortened transmission time intervals according to the subframe information applying the shortened transmission time intervals, the length of the shortened transmission time intervals applied by the user equipment and/or the number of the shortened transmission time intervals in the subframes with the shortened transmission time intervals.
Optionally, the obtaining, by the ue, the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by using the application includes: and the user equipment determines the length and the number of the shortened transmission time intervals in the subframes with the shortened transmission time intervals and the initial position of each shortened transmission time interval according to the subframe information applying the shortened transmission time intervals, the number of the symbols occupied by the physical downlink control channel in the subframes and the length of the shortened transmission time intervals agreed by the base station and the user equipment in advance.
Optionally, the radio resource control signaling also carries an initial position of a shortened transmission time interval in a subframe;
the user equipment acquires the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, and the configuration information comprises the following information: and the user equipment determines the length and the number of the shortened transmission time intervals in the subframes applying the shortened transmission time intervals and the initial position of each shortened transmission time interval according to the subframe information applying the shortened transmission time intervals, the initial position of the shortened transmission time intervals in the subframes and the length of the shortened transmission time intervals agreed by the base station and the user equipment in advance.
Optionally, the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied;
the user equipment acquires the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, and the configuration information comprises the following information: and the user equipment determines the length and the number of the shortened transmission time intervals in the subframes applying the shortened transmission time intervals and the initial position of each shortened transmission time interval according to the subframe information applying the shortened transmission time intervals, the number of the symbols occupied by the physical downlink control channel in the subframes, the length of the shortened transmission time intervals applied by the user equipment and/or the number of the shortened transmission time intervals in the subframes applying the shortened transmission time intervals.
Optionally, the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied, and a starting position of the shortened transmission time interval in the subframe;
the user equipment acquires the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, and the configuration information comprises the following information: and the user equipment determines the length and the number of the shortened transmission time intervals in the sub-frames applying the shortened transmission time intervals and the starting position of each shortened transmission time interval according to the sub-frame information applying the shortened transmission time intervals, the starting position of the shortened transmission time intervals in the sub-frames, the length of the shortened transmission time intervals applied by the user equipment and/or the number of the shortened transmission time intervals in the sub-frames applying the shortened transmission time intervals.
Optionally, the radio resource control signaling further carries timeslot information for shortening a transmission time interval, where the timeslot information for shortening the transmission time interval indicates which timeslot in the subframe for shortening the transmission time interval is used for shortening the transmission time interval;
the user equipment acquires the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, and the configuration information comprises the following information: and the user equipment acquires the configuration information of the shortened transmission time interval of each subframe of which the transmission time interval is shortened on a specific time slot according to the subframe information of which the transmission time interval is shortened by the application and the time slot information of which the transmission time interval is shortened by the application.
In a second aspect, the present invention provides a base station, comprising:
a sending unit, configured to send a radio resource control signaling to a user equipment, where the radio resource control signaling carries subframe information for applying a shortened transmission time interval, and a length of the shortened transmission time interval is smaller than a length of a subframe.
Optionally, the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied.
Optionally, the radio resource control signaling further carries a starting position of a shortened transmission time interval in a subframe.
Optionally, the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied, and a starting position of the shortened transmission time interval in the subframe.
Optionally, the radio resource control signaling further carries timeslot information for shortening a transmission time interval, where the timeslot information for shortening the transmission time interval indicates which timeslot in the subframe for shortening the transmission time interval is used for shortening the transmission time interval.
In a third aspect, the present invention provides a user equipment, comprising:
a first receiving unit, configured to receive a radio resource control signaling sent by a base station, where the radio resource control signaling carries subframe information for shortening a transmission time interval, where a length of the shortened transmission time interval is smaller than a length of a subframe;
a learning unit, configured to learn, according to the subframe information for shortening the transmission time interval by the application, configuration information for shortening the transmission time interval in each subframe for shortening the transmission time interval by the application;
a second receiving unit, configured to receive a shortened downlink control signaling in the subframe to which the shortened tti is applied according to the configuration information of the shortened tti.
Optionally, the learning unit is configured to learn, according to the subframe information for applying the shortened transmission time interval and a length of the shortened transmission time interval agreed in advance by the base station and the user equipment, the length and the number of the shortened transmission time intervals in the subframes for applying the shortened transmission time intervals.
Optionally, the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied;
and the learning unit is configured to learn, according to the subframe information for applying the shortened transmission time interval, the length of the shortened transmission time interval applied by the ue, and/or the number of the shortened transmission time intervals included in the subframe for applying the shortened transmission time interval, the length and the number of the shortened transmission time intervals in the subframe for applying the shortened transmission time interval.
Optionally, the learning unit is configured to determine the length and the number of the shortened transmission time intervals in the subframes for each application of the shortened transmission time interval, and the starting position of each shortened transmission time interval according to the subframe information for applying the shortened transmission time interval, the number of symbols occupied by the physical downlink control channel in the subframe, and the length of the shortened transmission time interval agreed in advance by the base station and the user equipment.
Optionally, the radio resource control signaling also carries an initial position of a shortened transmission time interval in a subframe;
and the learning unit is used for determining the length and the number of the shortened transmission time intervals in the subframes applying the shortened transmission time intervals and the initial position of each shortened transmission time interval according to the subframe information applying the shortened transmission time intervals, the initial position of the shortened transmission time intervals in the subframes and the length of the shortened transmission time intervals agreed by the base station and the user equipment in advance.
Optionally, the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied;
and the learning unit is configured to determine the length and the number of the shortened transmission time intervals in the subframes to which the shortened transmission time intervals are applied, and the starting position of each shortened transmission time interval according to the subframe information to which the shortened transmission time intervals are applied, the number of symbols occupied by the physical downlink control channel in the subframe, and the length of the shortened transmission time intervals applied by the user equipment and/or the number of the shortened transmission time intervals included in the subframe to which the shortened transmission time intervals are applied.
Optionally, the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied, and a starting position of the shortened transmission time interval in the subframe;
and the learning unit is configured to determine the length and the number of the shortened transmission time intervals in the subframes to which the shortened transmission time intervals are applied, and the starting position of each shortened transmission time interval in the subframes to which the shortened transmission time intervals are applied, and/or the number of the shortened transmission time intervals included in the subframes to which the shortened transmission time intervals are applied.
Optionally, the radio resource control signaling further carries timeslot information for shortening a transmission time interval, where the timeslot information for shortening the transmission time interval indicates which timeslot in the subframe for shortening the transmission time interval is used for shortening the transmission time interval;
and the acquiring unit is used for acquiring the configuration information of the shortened transmission time interval of each subframe of which the transmission time interval is shortened on a specific time slot according to the subframe information of which the transmission time interval is shortened by the application and the time slot information of which the transmission time interval is shortened by the application.
In a fourth aspect, the present invention provides a downlink data scheduling configuration system, including a base station and a user equipment;
the base station is used for sending a radio resource control signaling to user equipment, wherein the radio resource control signaling carries subframe information for shortening a transmission time interval, and the length of the shortened transmission time interval is less than the length of a subframe;
the user equipment is configured to acquire configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval, and receive a shortened downlink control signaling in the subframes for shortening the transmission time interval according to the configuration information for shortening the transmission time interval.
The downlink data scheduling configuration method and system, the base station and the user equipment provided by the embodiment of the invention can support the scheduling of which the transmission time interval is shorter than the length of the subframe, provide the service with shorter time delay for the user equipment, adapt to the scheduling of which the existing transmission time interval is equal to the length of the subframe, and avoid the interference between a shortened physical downlink control channel and a multimedia broadcast multicast service. By shortening the transmission time interval, the new transmission or retransmission times of the packet data can be increased, and a better block error rate target is realized, so that the utilization efficiency and the throughput rate of a wireless link are improved.
Drawings
Fig. 1 is a flowchart of a downlink data scheduling configuration method according to an embodiment of the present invention;
fig. 2 and fig. 3 are schematic diagrams of the STTI configuration components provided by the embodiment of the invention;
fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a downlink data scheduling configuration system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a downlink data scheduling configuration method, as shown in fig. 1, the method includes:
s11, the base station sends RRC (Radio Resource Control) signaling to the user equipment, wherein the RRC signaling carries the subframe information of the application STTI (Shortened Transmission Time Interval), and the length of the STTI is less than the length of the subframe;
wherein the subframe information of applying the STTI indicates whether the STTI is applied per subframe.
The length of the STTI may be 2 symbols, 4 symbols, and 7 symbols, but is not limited thereto.
And S12, the user equipment acquires the configuration information of the STTI in each subframe applying the STTI according to the subframe information applying the STTI.
The configuration information of the STTI may include the length and number of the STTI, or may further include a start position of each STTI.
S13, the user equipment receives the shortened downlink control signaling in the subframe applying the STTI according to the configuration information of the STTI.
According to the downlink data scheduling configuration method provided by the embodiment of the invention, the user equipment can acquire the configuration information of the STTI in each subframe applying the STTI according to the subframe information of the STTI applied in the RRC signaling sent by the base station, realize the scheduling of the transmission time interval lower than the subframe length, adapt to the scheduling of the existing transmission time interval equal to the subframe length, and avoid the interference between the physical downlink control channel and the multimedia broadcast multicast service. By using the STTI, the new transmission or retransmission times of the packet data can be increased, and a better block error rate target is realized, so that the utilization efficiency and the throughput rate of a wireless link are improved.
Optionally, the obtaining, by the ue, the configuration information of the STTI in the subframes to which the STTI is applied according to the subframe information to which the STTI is applied includes: and the user equipment acquires the length and the number of the STTIs in the subframes applying the STTIs according to the subframe information applying the STTIs and the length of the STTIs agreed by the base station and the user equipment in advance.
Optionally, the RRC signaling further carries a length of the STTI applied by the user equipment and/or a number of the STTI included in a subframe to which the STTI is applied;
the user equipment acquires the configuration information of the STTI in each subframe applying the STTI according to the subframe information applying the STTI, and the configuration information comprises the following steps: and the user equipment acquires the length and the number of the STTIs in the subframes applying the STTIs according to the subframe information applying the STTIs, the length of the STTIs applied by the user equipment and/or the number of the STTIs in the subframes applying the STTIs.
Wherein, the length of the STTI applied by the user equipment and/or the number of the STTIs included in the subframe to which the STTI is applied may be respectively set according to the subframe information.
That is, for each subframe to which the STTI is applied, the length of the STTI applied thereto and/or the number of STTIs included in the subframe to which the STTI is applied may be respectively set to be the same or different.
Specifically, the subframe information to which the STTI is applied is composed of a string of bits having a length L, and the length L is variable, for example, L-20 bits or L-40 bits are configured. The first leftmost bit corresponds to NSFNSubframe #0, NSFNSatisfies the formula NSFNmod X is 0, where N isSFNThe system frame number of the serving cell, X is the bit string length L divided by 10Multiples of (a). If the bit value is 1, the corresponding subframe has STTI configuration; otherwise, it indicates that the corresponding subframe does not have the STTI configuration. In fact, formula NSFNAnd (2) the mod X is 0 and uniquely determines the system frame where the STTI is positioned, the starting position of the subframe and the configuration period. According to the value of each bit in the bit string, the UE may determine whether the subframe corresponding to the bit applies the STTI.
The RRC signaling may carry at least one of the length of the STTI applied by the UE and the number of the STTI included in the subframe to which the STTI is applied, provided that the UE can directly determine the time domain parameter configuration of each subframe to which the STTI is applied according to the information carried in the RRC signaling. That is, if the UE can directly determine the time domain parameter configuration of each subframe to which the STTI is applied when only one of the two pieces of information is carried in the RRC signaling, the RRC signaling may only carry one of the two pieces of information; if the UE cannot directly determine the time domain parameter configuration of each subframe to which the STTI is applied when only one of the two pieces of information is carried in the RRC signaling, all of the two pieces of information need to be carried in the RRC signaling.
And after receiving the length of the STTI applied by the UE and/or the number of the STTIs in the subframe applying the STTI, which are carried in the RRC signaling, the UE analyzes the configuration composition of the STTI in the subframe applying the STTI.
For example, if the length of the STTI applied by the UE carried in the RRC signaling is 2 symbols, 4 symbols, and 7 symbols, the number of the STTI included in the subframe to which the STTI is applied is 2, and the PDCCH occupies 1 to 3 OFDM symbols of the control region, as shown in fig. 2, the UE may determine that the time domain parameter configuration of the subframe to which the STTI is applied is (4, 7);
if the length of the STTI applied by the UE carried in the RRC signaling is 2 symbols, 4 symbols, and 7 symbols, and the number of the STTIs included in the subframe to which the STTI is applied is 3, as shown in fig. 3, the UE may determine that the time domain parameter configuration of the subframe to which the STTI is applied is (2, 2, 7).
Furthermore, in the subframe to which the STTI is applied, the UE detects a PDCCH and also detects an SPDCCH (short Physical Downlink Control Channel) scheduled by the STTI, which shortens a Physical Downlink Control Channel); in a subframe to which the STTI is not applied, a PDCCH is detected.
Optionally, the obtaining, by the ue, the configuration information of the STTI in the subframes to which the STTI is applied according to the subframe information to which the STTI is applied includes: and the user equipment determines the length and the number of the STTIs in the subframes applying the STTIs and the initial position of each STTI according to the subframe information applying the STTIs, the number of the symbols occupied by the physical downlink control channel in the subframe and the length of the STTIs agreed by the base station and the user equipment in advance.
Specifically, the UE detects the number of symbols occupied by the PDCCH in the subframe to which the STTI is applied, and then determines the length and number of the STTI in each subframe to which the STTI is applied and the start position of each STTI according to the number of symbols occupied by the PDCCH and the length of the STTI agreed in advance by the base station and the user equipment.
For example: if the UE detects that the PDCCH occupies 2 symbols in a subframe to which the STTI is applied, and the length of the STTI agreed by the base station and the UE in advance is 4, the UE can determine that the STTI configuration composition on the subframe is (4, 4, 4), and the starting positions of the subframes are the 3 rd symbol, the 7 th symbol, and the 11 th symbol, respectively.
Optionally, the RRC signaling further carries a start position of the STTI in the subframe;
the user equipment acquires the configuration information of the STTI in each subframe applying the STTI according to the subframe information applying the STTI, and the configuration information comprises the following steps: and the user equipment determines the length and the number of the STTIs in the sub-frames applying the STTIs and the initial position of each STTI according to the sub-frame information applying the STTIs, the initial position of the STTIs in the sub-frames and the length of the STTIs agreed by the base station and the user equipment in advance.
For example: if the starting position of the STTI in the subframe is the 3 rd symbol, and the length of the STTI agreed by the base station and the UE in advance is 4, the UE can determine that the STTI configuration composition on the subframe is (4, 4, 4), and the starting positions of the subframes are the 3 rd symbol, the 7 th symbol, and the 11 th symbol, respectively.
Optionally, the RRC signaling further carries a length of the STTI applied by the user equipment and/or a number of the STTI included in a subframe to which the STTI is applied;
the user equipment acquires the configuration information of the STTI in each subframe applying the STTI according to the subframe information applying the STTI, and the configuration information comprises the following steps: and the user equipment determines the length and the number of the STTIs in the sub-frames applying the STTIs and the initial position of each STTI according to the sub-frame information applying the STTIs, the number of the symbols occupied by the physical downlink control channel in the sub-frames, the length of the STTIs applied by the user equipment and/or the number of the STTIs in the sub-frames applying the STTIs.
For example: if the UE detects that the PDCCH occupies 3 symbols in a subframe applying the STTI, the length of the STTI applied by the UE is 2 symbols, 4 symbols and 7 symbols; if the number of the STTI is 2, the UE can determine that the STTI configuration composition on the subframe is (4, 7), and the starting position of each subframe is the 4 th symbol and the 8 th symbol, respectively; if the number of STTIs is 3, the UE can determine that the STTI configuration composition on the subframe is (2, 2, 7), and the start position of each subframe is the 4 th symbol, the 6 th symbol, and the 8 th symbol, respectively.
If the UE detects that the PDCCH occupies 2 symbols in a subframe applying the STTI, the length of the STTI applied by the UE is 2 symbols, 4 symbols and 7 symbols; if the number of the STTI is 3, the UE can determine that the STTI configuration composition on the subframe is (4, 4, 4), and the starting position of each subframe is the 3 rd symbol, the 7 th symbol, and the 11 th symbol, respectively; if the number of STTIs is 4, the UE can determine that the STTI configuration composition on the subframe is (2, 2, 4, 4), and the start positions of the subframes are the 3 rd symbol, the 5 th symbol, the 7 th symbol, and the 11 th symbol, respectively.
Optionally, the RRC signaling further carries a length of the STTI applied by the user equipment and/or a number of the STTI included in a subframe to which the STTI is applied and a starting position of the STTI in the subframe;
the user equipment acquires the configuration information of the STTI in each subframe applying the STTI according to the subframe information applying the STTI, and the configuration information comprises the following steps: and the user equipment determines the length and the number of the STTIs in each subframe applying the STTI and the initial position of each STTI according to the subframe information applying the STTI, the initial position of the STTI in the subframe, the length of the STTI applied by the user equipment and/or the number of the STTIs in the subframe applying the STTI.
For example: if the starting position of the STTI in the subframe is the 4 th symbol, the length of the STTI applied by the UE is 2 symbols, 4 symbols and 7 symbols; if the number of the STTI is 2, the UE can determine that the STTI configuration composition on the subframe is (4, 7), and the starting position of each subframe is the 4 th symbol and the 8 th symbol, respectively; if the number of STTIs is 3, the UE can determine that the STTI configuration composition on the subframe is (2, 2, 7), and the start position of each subframe is the 4 th symbol, the 6 th symbol, and the 8 th symbol, respectively.
If the starting position of the STTI in the subframe is the 3 rd symbol, the length of the STTI applied by the UE is 2 symbols, 4 symbols and 7 symbols; if the number of the STTI is 3, the UE can determine that the STTI configuration composition on the subframe is (4, 4, 4), and the starting position of each subframe is the 3 rd symbol, the 7 th symbol, and the 11 th symbol, respectively; if the number of STTIs is 4, the UE can determine that the STTI configuration composition on the subframe is (2, 2, 4, 4), and the start positions of the subframes are the 3 rd symbol, the 5 th symbol, the 7 th symbol, and the 11 th symbol, respectively.
Optionally, the RRC signaling further carries timeslot information of an application STTI, where the timeslot information of the application STTI indicates which timeslot in the subframe of the application STTI applies the STTI;
the user equipment acquires the configuration information of the STTI in each subframe applying the STTI according to the subframe information applying the STTI, and the configuration information comprises the following steps: and the user equipment acquires the configuration information of the STTI of each STTI-applied subframe on a specific time slot according to the STTI-applied subframe information and the STTI-applied time slot information.
Specifically, the UE determines a specific timeslot of a specific subframe to apply the STTI according to the subframe information to which the STTI is applied and the timeslot information to apply the STTI, and then determines configuration information of the STTI on the timeslot according to one or more information of a length of the STTI, a number of symbols occupied by a physical downlink control channel in the subframe, a length of the STTI applied by the user equipment, a number of STTIs included in the subframe to which the STTI is applied, and a start position of the STTI in the subframe, which are predetermined by the base station and the user equipment.
Further, the UE detects the shortened downlink control signaling scheduled in the STTI in the slot to which the STTI is applied.
It should be noted that, in the downlink data scheduling configuration method provided in this embodiment, all the configuration subframes for STTI need to avoid MBSFN (Multicast Broadcast Single Frequency Network) subframes, so as to avoid interference between SPDCCH and MBMS (Multimedia Broadcast Multicast Service) services. If the configuration conflicts, the configuration priority of the SPDCCH may be agreed to be higher than that of the MBSFN subframe, and the UE needs to decode the corresponding subframe as if there is an STTI configuration.
An embodiment of the present invention further provides a base station, as shown in fig. 4, where the base station includes:
a sending unit 41, configured to send an RRC signaling to a user equipment, where the RRC signaling carries subframe information to which an STTI is applied, and a length of the STTI is smaller than a length of a subframe.
Wherein the subframe information of applying the STTI indicates whether the STTI is applied per subframe.
The length of the STTI may be 2 symbols, 4 symbols, and 7 symbols, but is not limited thereto.
The base station provided by the embodiment of the invention sends the subframe information carrying the STTI to the user equipment so that the user equipment determines the configuration information of the STTI in each subframe applying the STTI according to the subframe information, realizes the scheduling of the transmission time interval lower than the length of the subframe, adapts to the scheduling of the existing transmission time interval equal to the length of the subframe, and avoids the interference between the physical downlink control channel and the multimedia broadcast multicast service. By using the STTI, the new transmission or retransmission times of the packet data can be increased, and a better block error rate target is realized, so that the utilization efficiency and the throughput rate of a wireless link are improved.
Optionally, the RRC signaling further carries a length of the STTI applied by the user equipment and/or a number of the STTI included in the subframe to which the STTI is applied.
Optionally, the RRC signaling further carries a start position of the STTI in the subframe.
Optionally, the RRC signaling further carries a length of the STTI applied by the user equipment and/or a number of the STTI included in the subframe to which the STTI is applied and a start position of the STTI in the subframe.
Optionally, the radio resource control signaling further carries timeslot information for shortening a transmission time interval, where the timeslot information for shortening the transmission time interval indicates which timeslot in the subframe for shortening the transmission time interval is used for shortening the transmission time interval.
An embodiment of the present invention further provides a user equipment, as shown in fig. 5, where the user equipment includes:
a first receiving unit 51, configured to receive an RRC signaling sent by a base station, where the RRC signaling carries subframe information for applying an STTI, and a length of the STTI is smaller than a length of a subframe;
wherein the subframe information of applying the STTI indicates whether the STTI is applied per subframe.
The length of the STTI may be 2 symbols, 4 symbols, and 7 symbols, but is not limited thereto.
An acquiring unit 52, configured to acquire, according to the subframe information of the STTI, configuration information of the STTI in each subframe to which the STTI is applied;
the configuration information of the STTI may include the length and number of the STTI, or may further include a start position of each STTI.
A second receiving unit 53, configured to receive a shortened downlink control signaling in the subframe to which the STTI is applied according to the configuration information of the STTI.
The user equipment provided by the embodiment of the invention can acquire the configuration information of the STTI in each subframe applying the STTI according to the subframe information applying the STTI carried in the RRC signaling sent by the base station, realizes the scheduling of the transmission time interval lower than the length of the subframe, adapts to the scheduling of the existing transmission time interval equal to the length of the subframe, and avoids the interference between the physical downlink control channel and the multimedia broadcast multicast service. By using the STTI, the new transmission or retransmission times of the packet data can be increased, and a better block error rate target is realized, so that the utilization efficiency and the throughput rate of a wireless link are improved.
Optionally, the learning unit 52 is configured to learn the length and number of the STTI in each subframe that applies the STTI according to the subframe information that applies the STTI and the length of the STTI agreed in advance by the base station and the user equipment.
Optionally, the RRC signaling further carries a length of the STTI applied by the user equipment and/or a number of the STTI included in a subframe to which the STTI is applied;
the learning unit 52 is configured to learn the length and the number of the STTI in each subframe applying the STTI according to the subframe information applying the STTI, the length of the STTI applied by the user equipment, and/or the number of the STTI included in the subframe applying the STTI.
Optionally, the learning unit 52 is configured to determine the length and the number of the STTI in the subframe to which the STTI is applied, and the length of the STTI agreed in advance by the base station and the user equipment according to the subframe information to which the STTI is applied, the number of symbols occupied by the PDCCH in the subframe, and the starting position of each STTI.
Optionally, the RRC signaling further carries a start position of the STTI in the subframe;
the learning unit 52 is configured to determine the length and number of the STTI in each STTI-applied subframe and the starting position of each STTI according to the subframe information of the STTI, the starting position of the STTI in the subframe, and the length of the STTI agreed in advance by the base station and the user equipment.
Optionally, the RRC signaling further carries a length of the STTI applied by the user equipment and/or a number of the STTI included in a subframe to which the STTI is applied;
the learning unit 52 is configured to determine the length and the number of the STTI in each STTI-applied subframe and the start position of each STTI according to the subframe information to which the STTI is applied, the number of symbols occupied by the PDCCH in the subframe, the length of the STTI applied by the user equipment, and/or the number of the STTI included in the subframe to which the STTI is applied.
Optionally, the RRC signaling further carries a length of the STTI applied by the user equipment and/or a number of the STTI included in a subframe to which the STTI is applied and a starting position of the STTI in the subframe;
the learning unit 52 is configured to determine the length and the number of the STTI in each STTI-applied subframe and the start position of each STTI according to the subframe information of the STTI, the start position of the STTI in the subframe, the length of the STTI applied by the user equipment, and/or the number of the STTI included in the subframe in which the STTI is applied.
Optionally, the RRC signaling further carries timeslot information of an application STTI, where the timeslot information of the application STTI indicates which timeslot in the subframe of the application STTI applies the STTI;
the learning unit 52 is configured to learn, according to the subframe information of the STTI and the timeslot information of the STTI, configuration information of the STTI of each subframe to which the STTI is applied on a specific timeslot.
The embodiment of the present invention further provides a downlink data scheduling configuration system, as shown in fig. 6, the system includes a base station 61 and a user equipment 62;
the base station 61 is configured to send an RRC signaling to the user equipment 61, where the RRC signaling carries subframe information to which an STTI is applied, and a length of the STTI is smaller than a length of a subframe;
wherein the subframe information of applying the STTI indicates whether the STTI is applied per subframe.
The length of the STTI may be 2 symbols, 4 symbols, and 7 symbols, but is not limited thereto.
The user equipment 62 is configured to obtain the configuration information of the STTI in the subframe to which the STTI is applied according to the subframe information to which the STTI is applied, and receive a shortened downlink control signaling in the subframe to which the STTI is applied according to the configuration information of the STTI.
The configuration information of the STTI may include the length and number of the STTI, or may further include a start position of each STTI.
In the downlink data scheduling configuration system provided in the embodiment of the present invention, the user equipment acquires, according to the subframe information of the application STTI carried in the RRC signaling sent by the base station, the configuration information of the STTI in each subframe to which the STTI is applied, implements scheduling in which the transmission time interval is shorter than the subframe length, and adapts to the scheduling in which the existing transmission time interval is equal to the subframe length, thereby avoiding shortening the interference between the physical downlink control channel and the multimedia broadcast multicast service. By using the STTI, the new transmission or retransmission times of the packet data can be increased, and a better block error rate target is realized, so that the utilization efficiency and the throughput rate of a wireless link are improved.
The downlink data scheduling configuration method and system, the base station and the user equipment provided by the embodiment of the invention are suitable for an LTE system, but not limited thereto.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (22)

1. A downlink data scheduling configuration method is characterized by comprising the following steps:
a base station sends a wireless resource control signaling to user equipment, wherein the wireless resource control signaling carries subframe information for shortening transmission time intervals, and the subframe information for shortening the transmission time intervals indicates whether each subframe applies the shortened transmission time intervals or not, wherein the length of the shortened transmission time intervals is less than the length of the subframes;
the user equipment acquires configuration information for shortening the transmission time interval in each subframe for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, wherein the configuration information for shortening the transmission time interval comprises the length and the number of the shortened transmission time intervals or also comprises the initial position of each shortened transmission time interval;
and the user equipment receives a shortened downlink control signaling in the subframe applying the shortened transmission time interval according to the configuration information of the shortened transmission time interval.
2. The method of claim 1, wherein the step of the ue obtaining the configuration information of the shortened tti in each subframe of the shortened tti according to the subframe information of the shortened tti applied comprises: and the user equipment acquires the length and the number of the shortened transmission time intervals in the subframes with the shortened transmission time intervals according to the subframe information for shortening the transmission time intervals by the application and the length of the shortened transmission time intervals agreed by the base station and the user equipment in advance.
3. The method according to claim 1, wherein the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied;
the user equipment acquires the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, and the configuration information comprises the following information: and the user equipment acquires the length and the number of the shortened transmission time intervals in the subframes with the shortened transmission time intervals according to the subframe information applying the shortened transmission time intervals, the length of the shortened transmission time intervals applied by the user equipment and/or the number of the shortened transmission time intervals in the subframes with the shortened transmission time intervals.
4. The method of claim 1, wherein the step of the ue obtaining the configuration information of the shortened tti in each subframe of the shortened tti according to the subframe information of the shortened tti applied comprises: and the user equipment determines the length and the number of the shortened transmission time intervals in the subframes with the shortened transmission time intervals and the initial position of each shortened transmission time interval according to the subframe information applying the shortened transmission time intervals, the number of the symbols occupied by the physical downlink control channel in the subframes and the length of the shortened transmission time intervals agreed by the base station and the user equipment in advance.
5. The method of claim 1, wherein the radio resource control signaling further carries a starting position of a shortened transmission time interval in a subframe;
the user equipment acquires the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, and the configuration information comprises the following information: and the user equipment determines the length and the number of the shortened transmission time intervals in the subframes applying the shortened transmission time intervals and the initial position of each shortened transmission time interval according to the subframe information applying the shortened transmission time intervals, the initial position of the shortened transmission time intervals in the subframes and the length of the shortened transmission time intervals agreed by the base station and the user equipment in advance.
6. The method according to claim 1, wherein the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied;
the user equipment acquires the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, and the configuration information comprises the following information: and the user equipment determines the length and the number of the shortened transmission time intervals in the subframes applying the shortened transmission time intervals and the initial position of each shortened transmission time interval according to the subframe information applying the shortened transmission time intervals, the number of the symbols occupied by the physical downlink control channel in the subframes, the length of the shortened transmission time intervals applied by the user equipment and/or the number of the shortened transmission time intervals in the subframes applying the shortened transmission time intervals.
7. The method according to claim 1, wherein the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied and a starting position of the shortened transmission time interval in the subframe;
the user equipment acquires the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, and the configuration information comprises the following information: and the user equipment determines the length and the number of the shortened transmission time intervals in the sub-frames applying the shortened transmission time intervals and the starting position of each shortened transmission time interval according to the sub-frame information applying the shortened transmission time intervals, the starting position of the shortened transmission time intervals in the sub-frames, the length of the shortened transmission time intervals applied by the user equipment and/or the number of the shortened transmission time intervals in the sub-frames applying the shortened transmission time intervals.
8. The method of claim 1, wherein the radio resource control signaling further carries timeslot information of an application shortened transmission time interval, and the timeslot information of the application shortened transmission time interval indicates which timeslot in the subframe of the application shortened transmission time interval is applied for the shortened transmission time interval;
the user equipment acquires the configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval by the application, and the configuration information comprises the following information: and the user equipment acquires the configuration information of the shortened transmission time interval of each subframe of which the transmission time interval is shortened on a specific time slot according to the subframe information of which the transmission time interval is shortened by the application and the time slot information of which the transmission time interval is shortened by the application.
9. A base station, comprising:
a sending unit, configured to send a radio resource control signaling to a user equipment, where the radio resource control signaling carries subframe information for applying a shortened transmission time interval, the subframe information to which the shortened transmission time interval is applied indicates whether the shortened transmission time interval is applied per subframe, wherein the length of the shortened transmission time interval is smaller than the length of the subframe, so that the user equipment can acquire the configuration information of the shortened transmission time interval in each subframe of the shortened transmission time interval according to the subframe information of the shortened transmission time interval applied, and receiving a shortened downlink control signaling in the subframe applying the shortened transmission time interval according to the configuration information of the shortened transmission time interval, the configuration information of the shortened transmission time interval includes the length and the number of the shortened transmission time intervals, or further includes the start position of each shortened transmission time interval.
10. The base station of claim 9, wherein the radio resource control signaling further carries a length of a shortened transmission time interval applied by the ue and/or a number of shortened transmission time intervals included in a subframe to which the shortened transmission time interval is applied.
11. The base station of claim 9, wherein the radio resource control signaling further carries a starting position of a shortened transmission time interval in a subframe.
12. The base station of claim 9, wherein the radio resource control signaling further carries a length of a shortened tti applied by the ue and/or a number of shortened ttis included in a subframe to which the shortened tti is applied, and a starting position of the shortened tti in the subframe.
13. The base station of claim 9, wherein the radio resource control signaling further carries timeslot information for applying a shortened transmission time interval, and the timeslot information for applying a shortened transmission time interval indicates which timeslot in the subframe for applying a shortened transmission time interval applies the shortened transmission time interval.
14. A user device, comprising:
a first receiving unit, configured to receive a radio resource control signaling sent by a base station, where the radio resource control signaling carries subframe information for applying a shortened transmission time interval, and the subframe information for applying the shortened transmission time interval indicates whether each subframe applies the shortened transmission time interval, where a length of the shortened transmission time interval is less than a length of the subframe;
a learning unit, configured to learn, according to the subframe information for applying the shortened transmission time interval, configuration information for shortening the transmission time interval in each subframe for applying the shortened transmission time interval, where the configuration information for shortening the transmission time interval includes the length and number of the shortened transmission time interval, or also includes a starting position of each shortened transmission time interval;
a second receiving unit, configured to receive a shortened downlink control signaling in the subframe to which the shortened tti is applied according to the configuration information of the shortened tti.
15. The UE of claim 14, wherein the learning unit is configured to learn, according to the subframe information of the shortened TTI and the length of the shortened TTI agreed by the BS and the UE in advance, the length and the number of the shortened TTSs in each subframe of the shortened TTI.
16. The UE of claim 14, wherein the RRC signaling further carries a length of a shortened TTI applied by the UE and/or a number of shortened TTSs included in a subframe to which the shortened TTI is applied;
and the learning unit is configured to learn, according to the subframe information for applying the shortened transmission time interval, the length of the shortened transmission time interval applied by the ue, and/or the number of the shortened transmission time intervals included in the subframe for applying the shortened transmission time interval, the length and the number of the shortened transmission time intervals in the subframe for applying the shortened transmission time interval.
17. The ue according to claim 14, wherein the learning unit is configured to determine the length and the number of the shortened transmission time intervals in the subframes for applying the shortened transmission time intervals, and the starting position of each shortened transmission time interval according to the subframe information for applying the shortened transmission time interval, the number of symbols occupied by the physical downlink control channel in the subframe, and the length of the shortened transmission time interval agreed in advance by the base station and the ue.
18. The UE of claim 14, wherein the RRC signaling further carries a starting position of a shortened TTI in a subframe;
and the learning unit is used for determining the length and the number of the shortened transmission time intervals in the subframes applying the shortened transmission time intervals and the initial position of each shortened transmission time interval according to the subframe information applying the shortened transmission time intervals, the initial position of the shortened transmission time intervals in the subframes and the length of the shortened transmission time intervals agreed by the base station and the user equipment in advance.
19. The UE of claim 14, wherein the RRC signaling further carries a length of a shortened TTI applied by the UE and/or a number of shortened TTSs included in a subframe to which the shortened TTI is applied;
and the learning unit is configured to determine the length and the number of the shortened transmission time intervals in the subframes to which the shortened transmission time intervals are applied, and the starting position of each shortened transmission time interval according to the subframe information to which the shortened transmission time intervals are applied, the number of symbols occupied by the physical downlink control channel in the subframe, and the length of the shortened transmission time intervals applied by the user equipment and/or the number of the shortened transmission time intervals included in the subframe to which the shortened transmission time intervals are applied.
20. The UE of claim 14, wherein the RRC signaling further carries a length of a shortened TTI applied by the UE and/or a number of shortened TTSs included in a subframe to which the shortened TTI is applied, and a starting position of the shortened TTI in the subframe;
and the learning unit is configured to determine the length and the number of the shortened transmission time intervals in the subframes to which the shortened transmission time intervals are applied, and the starting position of each shortened transmission time interval in the subframes to which the shortened transmission time intervals are applied, and/or the number of the shortened transmission time intervals included in the subframes to which the shortened transmission time intervals are applied.
21. The UE of claim 14, wherein the RRC signaling further carries timeslot information for applying a shortened TTI, and the timeslot information for applying the shortened TTI indicates which timeslot in the subframe for applying the shortened TTI is applied for the shortened TTI;
and the acquiring unit is used for acquiring the configuration information of the shortened transmission time interval of each subframe of which the transmission time interval is shortened on a specific time slot according to the subframe information of which the transmission time interval is shortened by the application and the time slot information of which the transmission time interval is shortened by the application.
22. A downlink data scheduling configuration system is characterized by comprising a base station and user equipment;
the base station is used for sending a radio resource control signaling to user equipment, wherein the radio resource control signaling carries subframe information for shortening transmission time intervals, and the subframe information for shortening the transmission time intervals indicates whether each subframe applies the shortened transmission time intervals or not, wherein the length of the shortened transmission time intervals is less than the length of the subframes;
the user equipment is configured to acquire configuration information for shortening the transmission time interval in the subframes for shortening the transmission time interval according to the subframe information for shortening the transmission time interval, and receive a shortened downlink control signaling in the subframes for shortening the transmission time interval according to the configuration information for shortening the transmission time interval, where the configuration information for shortening the transmission time interval includes the length and number of the shortened transmission time interval, or also includes the starting position of each shortened transmission time interval.
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