CN105472717A - Data transmission method and data transmission device for ultra-dense network - Google Patents
Data transmission method and data transmission device for ultra-dense network Download PDFInfo
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- CN105472717A CN105472717A CN201510930930.1A CN201510930930A CN105472717A CN 105472717 A CN105472717 A CN 105472717A CN 201510930930 A CN201510930930 A CN 201510930930A CN 105472717 A CN105472717 A CN 105472717A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0238—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is an unwanted signal, e.g. interference or idle signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a data transmission method and a data transmission device for an ultra-dense network. The data transmission method suitable for a base station comprises: determining downlink scheduling information for a target terminal within a specified TTI (Transmission Time Interval); sending downlink control information including the downlink scheduling information to the target terminal within the specified TTI, so that the target terminal receives and demodulates downlink data sent by the base station according to the downlink scheduling information within the specified TTI and a preset number of TTIs after the specified TTI; determining the target TTI when sending of the downlink data is accomplished; and if the target TTI is ahead of a preset TTI in the preset number of TTIs, feeding back indication information to the target terminal in the downlink control information sent at the target TTI, wherein the indication information expresses sending accomplishment of the downlink data. By adopting the technical solution, the power consumption of the terminal can be effectively reduced in a semi-static scheduling process.
Description
Technical field
The present invention relates to communication technical field, in particular to a kind of data transmission method for super-intensive network and a kind of data transmission device for super-intensive network.
Background technology
At present, the 5th Generation Mobile Communication System (5G) is just among the research of academia and industrial circle, and wherein, UDN (Ultra-DenseNetwork, super-intensive network) is an important technology of 5G.UDN refers to when network design, the scene (such as stadium, railway station Waiting Lounge, office space etc.) large for some demand data amount, data cube computation number is many, carry out the networking of super-intensive, the interval between access website may only have tens of rice.UDN networking relies on the cooperation of access website, method such as interference eliminations etc. to provide higher data rate and more data cube computation for user.
Current in 4G network, in order to the dynamic characteristic of adaptive channel better, when downlink data transmission is carried out in base station, mainly send data by the mode of dynamic dispatching, namely at each TTI (TransmissionTimeInterval, Transmission Time Interval) re-start scheduling, be calculated as each UE (UserEquipment, subscriber equipment) resource of distributing (comprises carrier identification, Resourse Distribute head, RB (ResourceBlock, Resource Block) distribute), MCS (the ModulationandCodingScheme of data, modulation coding mode) etc. control information, and by these DCI (DownlinkControlInformation, Downlink Control Information) send to UE by DCIformat (descending control information format).Meanwhile, on the running time-frequency resource that also can calculate at each TTI of base station with the MCS calculated for object UE sends data.
Consider the scene that UDN scene mostly is accurate static, and the number of users accessing each UDN community is generally less.Such as, in Office Area, access point is generally densely deployed in the positions such as ceiling, and in access point to office, the channel of terminal room can be considered as accurate static, namely wireless channel along with the change of time comparatively slow.Therefore a kind of semi-static descending scheduling mode may be there is in UDN, that is, base station is when sending downlink data, is no longer the resource that each TTI calculates the distribution of UE dynamically, be transferred to the MCS etc. of object UE, but in N number of TTI certain object UE of continuous dispatching.In this N number of TTI, remained unchanged by the running time-frequency resource that the UE of descending scheduling uses, the MCS of employing also remains unchanged.In this N number of TTI, base station only needs to send the DCI of the information such as MCS comprising UE Resources allocation, data to object UE in first TTI, sends to the DCI of object UE not need to send the information such as MCS comprising UE Resources allocation, data in a follow-up N-1 TTI.Object UE only needs the information such as the information of the running time-frequency resource indicated in the DCI according to first TTI and the MCS of data to go to receive and demodulate the data issuing this UE.
But a kind of situation that may occur in semi-persistent scheduling is: base station sends to the data of object UE just to pass before semi-static scheduling cycle terminates.Such as in N-j (supposing N >=j+1) individual TTI, base station is sent for the downlink data of this object UE, but object UE does not also know that data are sent, therefore the running time-frequency resource place that UE also can go the DCI in first TTI to indicate in N-j+1 TTI receives data, and MCS indicated according to this DCI etc. information carries out data demodulates.Certainly the data that the demodulation that now UE can not be correct receives, this kind of incorrect situation of demodulation will be continued until that N number of TTI terminates, and in this process, UE just has unnecessary power consumption.
Summary of the invention
The present invention based on above-mentioned technical problem one of at least, proposes a kind of data transmission scheme for super-intensive network newly, makes in the process of semi-persistent scheduling, effectively can reduce the power consumption of terminal just.
In view of this, according to a first aspect of the invention, propose a kind of data transmission method for super-intensive network, be applicable to base station, comprise: in appointment TTI, determine the down dispatch information to target terminal; In described appointment TTI, the Downlink Control Information comprising described down dispatch information is sent to described target terminal, to make described target terminal in described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, according to described down dispatch information, the downlink data that described base station sends is received and demodulated; Target TTI residing when determining that described downlink data is sent completely; If before described target TTI is arranged in the predetermined TTI of a described predetermined quantity TTI, then in the Downlink Control Information of described target TTI transmission, feed back indication information to described target terminal, described indication information represents that described downlink data is sent completely.
In this technical scheme, base station is in the process of semi-persistent scheduling, target TTI residing during by determining that downlink data is sent completely, and when target TTI is arranged in before an above-mentioned predetermined quantity TTI presets TTI, to the indication information that target terminal feeding back downlink data have been sent completely, make target terminal when receiving indication information, still attempt receiving and demodulating the downlink data that base station sends to target terminal without the need to the TTI after being positioned at target TTI, effectively reduce the power consumption of target terminal.
Wherein, default TTI can be last TTI in above-mentioned predetermined quantity, also can be other TTI predefined.
In technique scheme, preferably, also comprise: in a described predetermined quantity TTI, if desired send Downlink Control Information to described target terminal, then send the Downlink Control Information not comprising described down dispatch information to described target terminal.
In above-mentioned arbitrary technical scheme, preferably, also comprise: obtain the value of predefined described predetermined quantity and the information of described default TTI; Or the value of described predetermined quantity is set according to the time variation of the wireless channel of described super-intensive network, wherein, the value of described predetermined quantity becomes inverse correlation relation with the time variation of the wireless channel of described super-intensive network.
In this technical scheme, the value of predetermined quantity can be standard agreement regulation, and can also arrange according to the time variation of the wireless channel of super-intensive network, particularly, the time variation of wireless channel is lower, and the value of predetermined quantity is larger; On the contrary, the time variation of wireless channel is higher, and the value of predetermined quantity is less.In addition, the information presetting TTI also can be standard agreement regulation.
In above-mentioned arbitrary technical scheme, preferably, also comprise: configure the value of described predetermined quantity by high-level signaling or physical layer signaling to described target terminal.
In above-mentioned arbitrary technical scheme, preferably, described down dispatch information comprises: described base station sends the carrier information and resource block information that described downlink data uses, and the MCS information that described base station is modulated described downlink data and encoded.
According to a second aspect of the invention, also proposed a kind of data transmission method for super-intensive network, be applicable to terminal, comprise: receive the descending control signaling including down dispatch information that base station sends in appointment TTI; In described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, according to described down dispatch information, the downlink data that described base station sends is received and demodulated; In the process receiving the downlink data that described base station sends, judge whether to receive the indication information fed back in the Downlink Control Information sent described base station, described indication information represents that described downlink data is sent completely; Receive described indication information if judge, be then in a described predetermined quantity TTI in the TTI after the TTI receiving described indication information and do not reattempt downlink data receiving.
In this technical scheme, terminal is in the process of semi-persistent scheduling, by the indication information that the mark downlink data judging whether to receive base station feedback has been sent completely, with when receiving this indication information, downlink data receiving is not reattempted in TTI after being in target TTI, making terminal receive and demodulate without the need to still attempting in the TTI after being in target TTI the downlink data that base station sends to target terminal, effectively reducing the power consumption of target terminal.
In technique scheme, preferably, also comprise: the value obtaining predefined described predetermined quantity; Or receive the value of the described predetermined quantity that described base station is configured by high-level signaling or physical layer signaling.
In this technical scheme, for the value of predetermined quantity, terminal can obtain the predefined value specified in standard agreement, or receives the value of base station configuration.
Embodiment according to a third aspect of the present invention, also proposed a kind of data transmission device for super-intensive network, is applicable to base station, comprises: the first determining unit, in appointment TTI, determines the down dispatch information to target terminal; First transmitting element, be connected to described first determining unit, for in described appointment TTI, the Downlink Control Information comprising described down dispatch information is sent to described target terminal, to make described target terminal in described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, according to described down dispatch information, the downlink data that described base station sends is received and demodulated; Second determining unit, is connected to described first transmitting element, target TTI residing during for determining that described downlink data is sent completely; Second transmitting element, be connected to described second determining unit, for before be arranged in the predetermined TTI of a described predetermined quantity TTI at described target TTI time, to described target terminal feedback indication information in the Downlink Control Information that described target TTI sends, described indication information represents that described downlink data is sent completely.
In this technical scheme, base station is in the process of semi-persistent scheduling, target TTI residing during by determining that downlink data is sent completely, and when target TTI is arranged in before an above-mentioned predetermined quantity TTI presets TTI, to the indication information that target terminal feeding back downlink data have been sent completely, make target terminal when receiving indication information, still attempt receiving and demodulating the downlink data that base station sends to target terminal without the need to the TTI after being positioned at target TTI, effectively reduce the power consumption of target terminal.
Wherein, default TTI can be last TTI in above-mentioned predetermined quantity, also can be other TTI predefined.
In technique scheme, preferably, described first transmitting element also for: in a described predetermined quantity TTI, if desired send Downlink Control Information to described target terminal, then send the Downlink Control Information not comprising described down dispatch information to described target terminal.
In above-mentioned arbitrary technical scheme, preferably, also comprise: acquiring unit, be connected to described first transmitting element, for the information of the value and described default TTI that obtain predefined described predetermined quantity, and be sent to described first transmitting element; Or
Setting unit, be connected to described first transmitting element, time variation for the wireless channel according to described super-intensive network arranges the value of described predetermined quantity, and be sent to described first transmitting element, wherein, the value of described predetermined quantity becomes inverse correlation relation with the time variation of the wireless channel of described super-intensive network.
In this technical scheme, the value of predetermined quantity can be standard agreement regulation, and can also arrange according to the time variation of the wireless channel of super-intensive network, particularly, the time variation of wireless channel is lower, and the value of predetermined quantity is larger; On the contrary, the time variation of wireless channel is higher, and the value of predetermined quantity is less.In addition, the information presetting TTI also can be standard agreement regulation.
In above-mentioned arbitrary technical scheme, preferably, also comprise: dispensing unit, for configuring the value of described predetermined quantity by high-level signaling or physical layer signaling to described target terminal.
In above-mentioned arbitrary technical scheme, preferably, described down dispatch information comprises: described base station sends the carrier information and resource block information that described downlink data uses, and the MCS information that described base station is modulated described downlink data and encoded.
According to a forth aspect of the invention, also proposed a kind of data transmission device for super-intensive network, be applicable to terminal, comprise: the first receiving element, for receiving the descending control signaling including down dispatch information that base station sends in appointment TTI; Second receiving element, is connected to described first receiving element, in described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, receives and demodulates the downlink data that described base station sends according to described down dispatch information; Judging unit, be connected to described second receiving element, for receiving in the process of the downlink data that described base station sends at described second receiving element, judge whether to receive the indication information fed back in the Downlink Control Information sent described base station, described indication information represents that described downlink data is sent completely; Wherein, described second receiving element also for, when described judging unit judges to receive described indication information, be in a described predetermined quantity TTI in the TTI after the TTI receiving described indication information and do not reattempt downlink data receiving.
In this technical scheme, terminal is in the process of semi-persistent scheduling, by the indication information that the mark downlink data judging whether to receive base station feedback has been sent completely, with when receiving this indication information, downlink data receiving is not reattempted in TTI after being in target TTI, making terminal receive and demodulate without the need to still attempting in the TTI after being in target TTI the downlink data that base station sends to target terminal, effectively reducing the power consumption of target terminal.
In technique scheme, preferably, also comprising: acquiring unit, be connected to described second receiving element, for obtaining the value of predefined described predetermined quantity, and being sent to described second receiving element; Or
3rd receiving element, is connected to described second receiving element, for receiving the value of the described predetermined quantity that described base station is configured by high-level signaling or physical layer signaling, and is sent to described second receiving element.
In this technical scheme, for the value of predetermined quantity, terminal can obtain the predefined value specified in standard agreement, or receives the value of base station configuration.
By above technical scheme, make in the process of semi-persistent scheduling, base station can to terminal feedback indication information after the transmission completing downlink data, and then base station can not reattempt and receives and demodulates downlink data in the TTI after the target TTI receiving indication information, effectively reduces the power consumption of terminal.
Accompanying drawing explanation
Fig. 1 shows the schematic flow diagram of the data transmission method for super-intensive network according to first embodiment of the invention;
Fig. 2 shows the schematic block diagram of the data transmission device for super-intensive network according to first embodiment of the invention;
Fig. 3 shows the schematic block diagram of base station according to an embodiment of the invention;
Fig. 4 shows the schematic flow diagram of the data transmission method for super-intensive network according to second embodiment of the present invention;
Fig. 5 shows the schematic block diagram of the data transmission device for super-intensive network according to second embodiment of the present invention;
Fig. 6 shows the schematic block diagram of terminal according to an embodiment of the invention.
Embodiment
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Fig. 1 shows the schematic flow diagram of the data transmission method for super-intensive network according to first embodiment of the invention.
As shown in Figure 1, the data transmission method for super-intensive network according to first embodiment of the invention, is applicable to base station, comprises:
Step 102, in appointment TTI, determines the down dispatch information to target terminal;
Step 104, in described appointment TTI, the Downlink Control Information comprising described down dispatch information is sent to described target terminal, to make described target terminal in described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, according to described down dispatch information, the downlink data that described base station sends is received and demodulated;
Step 106, target TTI residing when determining that described downlink data is sent completely;
Step 108, if before described target TTI is arranged in the predetermined TTI of a described predetermined quantity TTI, then to described target terminal feedback indication information in the Downlink Control Information sent at described target TTI, described indication information represents that described downlink data is sent completely.
In this technical scheme, base station is in the process of semi-persistent scheduling, target TTI residing during by determining that downlink data is sent completely, and when target TTI is arranged in before an above-mentioned predetermined quantity TTI presets TTI, to the indication information that target terminal feeding back downlink data have been sent completely, make target terminal when receiving indication information, still attempt receiving and demodulating the downlink data that base station sends to target terminal without the need to the TTI after being positioned at target TTI, effectively reduce the power consumption of target terminal.
Wherein, default TTI can be last TTI in above-mentioned predetermined quantity, also can be other TTI predefined.
In technique scheme, preferably, also comprise: in a described predetermined quantity TTI, if desired send Downlink Control Information to described target terminal, then send the Downlink Control Information not comprising described down dispatch information to described target terminal.
In above-mentioned arbitrary technical scheme, preferably, also comprise: obtain the value of predefined described predetermined quantity and the information of described default TTI; Or the value of described predetermined quantity is set according to the time variation of the wireless channel of described super-intensive network, wherein, the value of described predetermined quantity becomes inverse correlation relation with the time variation of the wireless channel of described super-intensive network.
In this technical scheme, the value of predetermined quantity can be standard agreement regulation, and can also arrange according to the time variation of the wireless channel of super-intensive network, particularly, the time variation of wireless channel is lower, and the value of predetermined quantity is larger; On the contrary, the time variation of wireless channel is higher, and the value of predetermined quantity is less.In addition, the information presetting TTI also can be standard agreement regulation.
In above-mentioned arbitrary technical scheme, preferably, also comprise: configure the value of described predetermined quantity by high-level signaling or physical layer signaling to described target terminal.
In above-mentioned arbitrary technical scheme, preferably, described down dispatch information comprises: described base station sends the carrier information and resource block information that described downlink data uses, and the MCS information that described base station is modulated described downlink data and encoded.
Fig. 2 shows the schematic block diagram of the data transmission device for super-intensive network according to first embodiment of the invention.
As shown in Figure 2, the data transmission device 200 for super-intensive network according to first embodiment of the invention, is applicable to base station, comprises:
First determining unit 202, in appointment TTI, determines the down dispatch information to target terminal; First transmitting element 204, be connected to described first determining unit 202, for in described appointment TTI, the Downlink Control Information comprising described down dispatch information is sent to described target terminal, to make described target terminal in described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, according to described down dispatch information, the downlink data that described base station sends is received and demodulated; Second determining unit 206, is connected to described first transmitting element 204, target TTI residing during for determining that described downlink data is sent completely; Second transmitting element 208, be connected to described second determining unit 206, for before be arranged in the predetermined TTI of a described predetermined quantity TTI at described target TTI time, to described target terminal feedback indication information in the Downlink Control Information that described target TTI sends, described indication information represents that described downlink data is sent completely.
In this technical scheme, base station is in the process of semi-persistent scheduling, target TTI residing during by determining that downlink data is sent completely, and when target TTI is arranged in before an above-mentioned predetermined quantity TTI presets TTI, to the indication information that target terminal feeding back downlink data have been sent completely, make target terminal when receiving indication information, still attempt receiving and demodulating the downlink data that base station sends to target terminal without the need to the TTI after being positioned at target TTI, effectively reduce the power consumption of target terminal.
Wherein, default TTI can be last TTI in above-mentioned predetermined quantity, also can be other TTI predefined.
In technique scheme, preferably, described first transmitting element 204 also for: in a described predetermined quantity TTI, if desired send Downlink Control Information to described target terminal, then send the Downlink Control Information not comprising described down dispatch information to described target terminal.
In above-mentioned arbitrary technical scheme, preferably, also comprise: acquiring unit 210, be connected to described first transmitting element 204, for the information of the value and described default TTI that obtain predefined described predetermined quantity, and be sent to described first transmitting element 204; Or
Setting unit 212, be connected to described first transmitting element 204, time variation for the wireless channel according to described super-intensive network arranges the value of described predetermined quantity, and be sent to described first transmitting element 204, wherein, the value of described predetermined quantity becomes inverse correlation relation with the time variation of the wireless channel of described super-intensive network.
In this technical scheme, the value of predetermined quantity can be standard agreement regulation, and can also arrange according to the time variation of the wireless channel of super-intensive network, particularly, the time variation of wireless channel is lower, and the value of predetermined quantity is larger; On the contrary, the time variation of wireless channel is higher, and the value of predetermined quantity is less.In addition, the information presetting TTI also can be standard agreement regulation.
In above-mentioned arbitrary technical scheme, preferably, also comprise: dispensing unit 214, for configuring the value of described predetermined quantity by high-level signaling or physical layer signaling to described target terminal.
In above-mentioned arbitrary technical scheme, preferably, described down dispatch information comprises: described base station sends the carrier information and resource block information that described downlink data uses, and the MCS information that described base station is modulated described downlink data and encoded.
Fig. 3 shows the schematic block diagram of base station according to an embodiment of the invention.
As shown in Figure 3, base station 300 according to an embodiment of the invention, comprising: as shown in Figure 2 for the data transmission device 200 of super-intensive network.
Fig. 4 shows the schematic flow diagram of the data transmission method for super-intensive network according to second embodiment of the present invention.
As shown in Figure 4, according to the data transmission method for super-intensive network of second embodiment of the present invention, be applicable to terminal, comprise:
Step 402, receives the descending control signaling including down dispatch information that base station sends in appointment TTI;
Step 404, in described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, receives and demodulates the downlink data that described base station sends according to described down dispatch information;
Step 406, in the process receiving the downlink data that described base station sends, judge whether to receive the indication information fed back in the Downlink Control Information sent described base station, described indication information represents that described downlink data is sent completely;
Step 408, receives described indication information if judge, is then in a described predetermined quantity TTI in the TTI after the TTI receiving described indication information and does not reattempt downlink data receiving.
In this technical scheme, terminal is in the process of semi-persistent scheduling, by the indication information that the mark downlink data judging whether to receive base station feedback has been sent completely, with when receiving this indication information, downlink data receiving is not reattempted in TTI after being in target TTI, making terminal receive and demodulate without the need to still attempting in the TTI after being in target TTI the downlink data that base station sends to target terminal, effectively reducing the power consumption of target terminal.
In technique scheme, preferably, also comprise: the value obtaining predefined described predetermined quantity; Or receive the value of the described predetermined quantity that described base station is configured by high-level signaling or physical layer signaling.
In this technical scheme, for the value of predetermined quantity, terminal can obtain the predefined value specified in standard agreement, or receives the value of base station configuration.
Fig. 5 shows the schematic block diagram of the data transmission device for super-intensive network according to second embodiment of the present invention.
As shown in Figure 5, according to the data transmission device 500 for super-intensive network of second embodiment of the present invention, be applicable to terminal, comprise:
First receiving element 502, for receiving the descending control signaling including down dispatch information that base station sends in appointment TTI; Second receiving element 504, is connected to described first receiving element 502, in described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, receives and demodulates the downlink data that described base station sends according to described down dispatch information; Judging unit 506, be connected to described second receiving element 504, for receiving in the process of the downlink data that described base station sends at described second receiving element 504, judge whether to receive the indication information fed back in the Downlink Control Information sent described base station, described indication information represents that described downlink data is sent completely; Wherein, described second receiving element 504 also for, when described judging unit 506 judges to receive described indication information, be in a described predetermined quantity TTI in the TTI after the TTI receiving described indication information and do not reattempt downlink data receiving.
In this technical scheme, terminal is in the process of semi-persistent scheduling, by the indication information that the mark downlink data judging whether to receive base station feedback has been sent completely, with when receiving this indication information, downlink data receiving is not reattempted in TTI after being in target TTI, making terminal receive and demodulate without the need to still attempting in the TTI after being in target TTI the downlink data that base station sends to target terminal, effectively reducing the power consumption of target terminal.
In technique scheme, preferably, also comprising: acquiring unit 508, be connected to described second receiving element 504, for obtaining the value of predefined described predetermined quantity, and being sent to described second receiving element 504; Or
3rd receiving element 510, is connected to described second receiving element 504, for receiving the value of the described predetermined quantity that described base station is configured by high-level signaling or physical layer signaling, and is sent to described second receiving element 504.
In this technical scheme, for the value of predetermined quantity, terminal can obtain the predefined value specified in standard agreement, or receives the value of base station configuration.
Fig. 6 shows the schematic block diagram of terminal according to an embodiment of the invention.
As shown in Figure 6, terminal 600 according to an embodiment of the invention, comprising: as shown in Figure 5 for the data transmission device 500 of super-intensive network.
In sum, the present invention mainly proposes a kind of method of carrying out downlink data transmission in super-intensive network.In the method, the downlink transfer of base station and object UE is in the state of semi-persistent scheduling, and the cycle of semi-persistent scheduling is N number of TTI.When before default TTI, base station is sent to the data of object UE, in the DCI in that TTI that end data sends, base station needs to add the signaling that downlink data transmission has terminated or semi-persistent scheduling has terminated representing this object UE, can trial be gone again to receive and demodulate data in notice UE several remaining TTI in N number of TTI of semi-static scheduling cycle, reduce the power consumption of UE thus.
Concrete steps are as follows:
1, under semi-persistent scheduling state, base station determines that the TTI terminated to object UE transmission downlink data (supposes that semi-static scheduling cycle is N number of TTI, default TTI is M, M < N, the relative numbering of this TTI in semi-static scheduling cycle is i, namely this TTI is that i-th TTI, TTI numbering in this semi-static scheduling cycle is from 1);
If 2 i≤M, then represent that the downlink data of this object UE sends terminated or signaling that semi-persistent scheduling has terminated adding in the DCI of object UE in TTIi;
3, after object UE receives above-mentioned signaling, in several the remaining TTI in N number of TTI of semi-static scheduling cycle, can trial be gone again to receive and demodulate data.
Wherein, above-mentioned N value and M value can be the preset values specified in a standard, can be by the value of base station by the semi-static configuration of high-level signaling, also can be by the value of the physical layer signaling dynamic-configuration of base station; The setting of above-mentioned N value can according to the environment residing for network, and particularly, when wireless channel time variation is lower, the value of N can be larger.
More than be described with reference to the accompanying drawings technical scheme of the present invention, the present invention proposes a kind of data transmission scheme for super-intensive network newly, make in the process of semi-persistent scheduling, base station can to terminal feedback indication information after the transmission completing downlink data, and then terminal can not reattempt and receives and demodulates downlink data in the TTI after the target TTI receiving indication information, effectively reduces the power consumption of terminal.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. for a data transmission method for super-intensive network, be applicable to base station, it is characterized in that, comprising:
In appointment TTI, determine the down dispatch information to target terminal;
In described appointment TTI, the Downlink Control Information comprising described down dispatch information is sent to described target terminal, to make described target terminal in described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, according to described down dispatch information, the downlink data that described base station sends is received and demodulated;
Target TTI residing when determining that described downlink data is sent completely;
If before described target TTI is arranged in the predetermined TTI of a described predetermined quantity TTI, then in the Downlink Control Information of described target TTI transmission, feed back indication information to described target terminal, described indication information represents that described downlink data is sent completely.
2. the data transmission method for super-intensive network according to claim 1, is characterized in that, also comprise:
In a described predetermined quantity TTI, if desired send Downlink Control Information to described target terminal, then send the Downlink Control Information not comprising described down dispatch information to described target terminal.
3. the data transmission method for super-intensive network according to claim 1, is characterized in that, also comprise:
Obtain the value of predefined described predetermined quantity and the information of described default TTI; Or
Arrange the value of described predetermined quantity according to the time variation of the wireless channel of described super-intensive network, wherein, the value of described predetermined quantity becomes inverse correlation relation with the time variation of the wireless channel of described super-intensive network.
4. the data transmission method for super-intensive network according to any one of claim 1 to 3, is characterized in that, also comprise:
The value of described predetermined quantity is configured to described target terminal by high-level signaling or physical layer signaling.
5. the data transmission method for super-intensive network according to any one of claim 1 to 3, is characterized in that, described down dispatch information comprises:
Described base station sends the carrier information and resource block information that described downlink data uses, and the MCS information that described base station is modulated described downlink data and encoded.
6. for a data transmission method for super-intensive network, be applicable to terminal, it is characterized in that, comprising:
Receive the descending control signaling including down dispatch information that base station sends in appointment TTI;
In described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, according to described down dispatch information, the downlink data that described base station sends is received and demodulated;
In the process receiving the downlink data that described base station sends, judge whether to receive the indication information fed back in the Downlink Control Information sent described base station, described indication information represents that described downlink data is sent completely;
Receive described indication information if judge, be then in a described predetermined quantity TTI in the TTI after the TTI receiving described indication information and do not reattempt downlink data receiving.
7. the data transmission method for super-intensive network according to claim 6, is characterized in that, also comprise:
Obtain the value of predefined described predetermined quantity; Or
Receive the value of the described predetermined quantity that described base station is configured by high-level signaling or physical layer signaling.
8. for a data transmission device for super-intensive network, be applicable to base station, it is characterized in that, comprising:
First determining unit, in appointment TTI, determines the down dispatch information to target terminal;
First transmitting element, be connected to described first determining unit, for in described appointment TTI, the Downlink Control Information comprising described down dispatch information is sent to described target terminal, to make described target terminal in described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, according to described down dispatch information, the downlink data that described base station sends is received and demodulated;
Second determining unit, is connected to described first transmitting element, target TTI residing during for determining that described downlink data is sent completely;
Second transmitting element, be connected to described second determining unit, for before be arranged in the predetermined TTI of a described predetermined quantity TTI at described target TTI time, to described target terminal feedback indication information in the Downlink Control Information that described target TTI sends, described indication information represents that described downlink data is sent completely.
9. the data transmission device for super-intensive network according to claim 8, is characterized in that, described first transmitting element also for:
In a described predetermined quantity TTI, if desired send Downlink Control Information to described target terminal, then send the Downlink Control Information not comprising described down dispatch information to described target terminal.
10. the data transmission device for super-intensive network according to claim 8, is characterized in that, also comprise:
Acquiring unit, is connected to described first transmitting element, for the information of the value and described default TTI that obtain predefined described predetermined quantity, and is sent to described first transmitting element; Or
Setting unit, be connected to described first transmitting element, time variation for the wireless channel according to described super-intensive network arranges the value of described predetermined quantity, and be sent to described first transmitting element, wherein, the value of described predetermined quantity becomes inverse correlation relation with the time variation of the wireless channel of described super-intensive network.
The data transmission device for super-intensive network according to any one of 11. according to Claim 8 to 10, is characterized in that, also comprise:
Dispensing unit, for configuring the value of described predetermined quantity by high-level signaling or physical layer signaling to described target terminal.
The data transmission device for super-intensive network according to any one of 12. according to Claim 8 to 10, is characterized in that, described down dispatch information comprises:
Described base station sends the carrier information and resource block information that described downlink data uses, and the MCS information that described base station is modulated described downlink data and encoded.
13. 1 kinds for the data transmission device of super-intensive network, are applicable to terminal, it is characterized in that, comprising:
First receiving element, for receiving the descending control signaling including down dispatch information that base station sends in appointment TTI;
Second receiving element, is connected to described first receiving element, in described appointment TTI, and after described appointment TTI in a predetermined quantity TTI, receives and demodulates the downlink data that described base station sends according to described down dispatch information;
Judging unit, be connected to described second receiving element, for receiving in the process of the downlink data that described base station sends at described second receiving element, judge whether to receive the indication information fed back in the Downlink Control Information sent described base station, described indication information represents that described downlink data is sent completely;
Wherein, described second receiving element also for, when described judging unit judges to receive described indication information, be in a described predetermined quantity TTI in the TTI after the TTI receiving described indication information and do not reattempt downlink data receiving.
14. data transmission devices for super-intensive network according to claim 13, is characterized in that, also comprise:
Acquiring unit, is connected to described second receiving element, for obtaining the value of predefined described predetermined quantity, and is sent to described second receiving element; Or
3rd receiving element, is connected to described second receiving element, for receiving the value of the described predetermined quantity that described base station is configured by high-level signaling or physical layer signaling, and is sent to described second receiving element.
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| CN105472717B (en) | 2019-01-29 |
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