CN101754396B - Method, system and device for indicating transmission mode - Google Patents
Method, system and device for indicating transmission mode Download PDFInfo
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- CN101754396B CN101754396B CN2008102279184A CN200810227918A CN101754396B CN 101754396 B CN101754396 B CN 101754396B CN 2008102279184 A CN2008102279184 A CN 2008102279184A CN 200810227918 A CN200810227918 A CN 200810227918A CN 101754396 B CN101754396 B CN 101754396B
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Abstract
The invention relates to a wireless communication technology, in particular to a method, a system and a device for indicating a transmission mode, which is used for solving the problem existing in the prior art that the existing DCI format can only correspond to a transmission mode to cause certain limitations in indicating the transmission mode by indication messages to cause losses on the system performance. The method comprises the following steps: a base station determines the corresponding transmission mode identification of the transmission mode needing to be destined to a terminal according to the pre-set transmission mode and the corresponding relationship of the transmission mode; indication messages containing downlink control information and determined transmission mode identification are generated and are sent to the terminal by a physical-layer downlink control channel to be used for indicating the corresponding transmission mode demodulating data of the transmission mode identification of the terminal. The embodiment of the invention can cause the transmission mode 7 to simultaneously support a transmit diversity mode and a DRS transmission mode in any environment, and increases the application range of the transmission mode 7.
Description
Technical field
The present invention relates to wireless communication technology, particularly a kind of mthods, systems and devices of indicating transmission mode.
Background technology
LTE (Long Term Evolution; Long Term Evolution) system is that PDSCH (Physical DownlinkShared Channel, Physical Downlink Shared Channel) has designed 7 kinds of different transmission modes, is applied to different service demand and channel circumstance, and 7 kinds of transmission modes are respectively:
Single-antenna port; Port 0 (single antenna port; Port 0); Transmit diversity (transmit diversity); Open-loop spatial multiplexing (Open-Loop Spatial Multiplexing); Closed-loop spatialmultiplexing (Closed-Loop Spatial Multiplexing); Multi-user MIMO (multiuser MIMO); Closed-loopRank=1precoding (order is 1 closed loop precoding); Single-antenna port; Port5 (single antenna port; Port 5).
Wherein, for the 7th kind of transmission mode, be divided into again based on the transmission mode of transmit diversity with based on DRS (Dedicated Reference signal, the DRS (Dedicated Reference Signal)) transmission mode of port 5.
At present, the base station is carried out data demodulates according to DCI (Downlink control information, Downlink Control Information) form (being DCI form 1 and DCI form 1A) indicating terminal through which kind of transmission mode, in the discussion of LTE standard, has proposed two kinds of indicating modes:
First kind of indicating mode is as shown in table 1, i.e. DCI form 1 corresponding diversity mode, the DRS transmission mode of the corresponding port 5 of DCI form 1A.
If needing indicating terminal to carry out data through diversity mode, the base station separates; Then the base station is according to the corresponding relation of table 1; Send the Indication message that comprises DCI form 1 to the terminal; Then the terminal is confirmed DCI form 1 corresponding diversity mode, thereby is carried out data demodulates through diversity mode equally according to the corresponding relation of table 1.
Table 1
Second kind of indicating mode is as shown in table 2, i.e. the corresponding diversity mode of DCI form 1A, the DRS transmission mode of DCI form 1 corresponding port 5.
Table 2
In the prior art, in above-mentioned every kind of mode, the DCI form in the Indication message of terminal is confirmed corresponding transmission means; The DCI form can only corresponding a kind of transmission mode; Because two kinds of DCI format character are different, the application corresponding scene is also different, during through the Indication message indicating transmission mode; Cause certain limitation, thereby systematic function is also had loss.
Summary of the invention
The embodiment of the invention provides a kind of mthods, systems and devices of indicating transmission mode; Can only corresponding a kind of transmission mode in order to solve the existing DCI form that exists in the prior art; When making through the Indication message indicating transmission mode; Cause certain limitation, thereby to the damnous problem of systematic function.
The method of a kind of indicating transmission mode that the embodiment of the invention provides comprises:
The base station is according to the corresponding relation of predefined transmission mode sign and transmission mode, and confirming need be to the corresponding transmission mode sign of the transmission mode of terminal appointment, and wherein said transmission mode is designated the cyclic redundancy check (CRC) mask;
Said base station generates the Indication message that contains Downlink Control Information and the CRC mask of confirming; The Indication message that will comprise the CRC bit after Downlink Control Information and the scrambling process; Send to the terminal through the physical layer descending control channel, be used to indicate said terminal at the corresponding transmission mode demodulating data of said transmission mode sign;
Wherein, the CRC bit after the said scrambling process is that said base station is carried out scrambling process according to Radio Network Temporary Identifier RNTI and said CRC mask to the CRC bit of Downlink Control Information respectively and obtained.
The system of a kind of indicating transmission mode that the embodiment of the invention provides comprises:
The base station; Be used for corresponding relation according to predefined transmission mode sign and transmission mode; Confirming need be to the corresponding transmission mode sign of the transmission mode of terminal appointment; Wherein said transmission mode is designated the cyclic redundancy check (CRC) mask, generates the Indication message contain Downlink Control Information and the CRC mask of confirming, will comprise the Indication message of the CRC bit after Downlink Control Information and the scrambling process; Send to the terminal through the physical layer descending control channel, be used to indicate said terminal at the corresponding transmission mode demodulating data of said transmission mode sign; Wherein, the CRC bit after the said scrambling process is that said base station is carried out scrambling process according to Radio Network Temporary Identifier RNTI and said CRC mask to the CRC bit of Downlink Control Information respectively and obtained;
The terminal is used for the corresponding relation according to said transmission mode sign and transmission mode, the corresponding transmission mode of transmission mode sign in the said Indication message of confirming to receive, and according to the transmission mode demodulating data of confirming.
A kind of base station that the embodiment of the invention provides comprises:
The sign determination module is used for the corresponding relation according to predefined transmission mode sign and transmission mode, and confirming need be to the corresponding transmission mode sign of the transmission mode of terminal appointment;
Generation module is used to generate the Indication message that contains Downlink Control Information and the transmission mode sign of confirming, wherein said transmission mode is designated the cyclic redundancy check (CRC) mask;
Sending module; Be used for to comprise the Indication message of the CRC bit after Downlink Control Information and the scrambling process; Send to the terminal through the physical layer descending control channel, the CRC bit after the said scrambling process is that said generation module carries out scrambling process according to Radio Network Temporary Identifier RNTI and said CRC mask to the CRC bit of Downlink Control Information respectively and obtains.
A kind of terminal that the embodiment of the invention provides comprises:
The transmission mode determination module is used for the transmission mode sign of basis foundation in advance and the corresponding relation of transmission mode, confirms the transmission mode of receiving from transmission mode sign correspondence in the Indication message that comprises Downlink Control Information and transmission mode sign of base station;
Demodulation module is used for according to the transmission mode demodulating data of confirming;
Wherein, said transmission mode is designated the cyclic redundancy check (CRC) mask; Said Indication message is that send through the physical layer descending control channel said base station; CRC bit after the said scrambling process is that said base station is carried out scrambling process according to Radio Network Temporary Identifier RNTI and said CRC mask to the CRC bit of Downlink Control Information respectively and obtained.
Embodiment of the invention base station is according to the corresponding relation of predefined transmission mode sign and transmission mode, and confirming need be to the corresponding transmission mode sign of the transmission mode of terminal appointment; Said base station generates the Indication message that contains Downlink Control Information and the transmission mode sign of confirming; Send said Indication message through the physical layer descending control channel to the terminal, be used to indicate said terminal at the corresponding transmission mode demodulating data of said transmission mode sign.Since can be through the sign of the transmission mode in the Indication message, the transmission mode that indication is corresponding makes transmission mode 7 can support diversity mode and DRS transmission mode simultaneously in any scene, has improved the range of application and the systematic function of transmission mode 7.
Description of drawings
Fig. 1 is the system configuration sketch map of embodiment of the invention indicating transmission mode;
Fig. 2 is an embodiment of the invention architecture of base station sketch map;
Fig. 3 is an embodiment of the invention terminal structure sketch map;
Fig. 4 is the method flow sketch map of embodiment of the invention indicating transmission mode.
Embodiment
Embodiment of the invention base station generates the Indication message that contains Downlink Control Information and transmission mode sign; And Indication message sent to the terminal; Through the transmission mode demodulating data of transmission mode sign indicating terminal in transmission mode sign correspondence; Make transmission mode 7 can support diversity mode and DRS transmission mode simultaneously, improved the range of application and the systematic function of transmission mode 7 in any scene.
Wherein, the embodiment of the invention can be applied to dynamic dispatching situation and semi-continuous scheduling situation.
Below in conjunction with Figure of description the embodiment of the invention is described in further detail.
As shown in Figure 1, the system of embodiment of the invention indicating transmission mode comprises: base station 10 and terminal 20.
Wherein, the corresponding relation of transmission mode sign and transmission mode can adopt database or file or other forms to store, and can store into respectively in base station 10 and the terminal 20, also can store into to supply base station 10 and terminal 20 to search in other entities.
Need to prove that the transmission mode sign that use base station 10 and the corresponding relation of transmission mode must identify identical with the corresponding relation of transmission mode with the transmission mode that use at terminal 20.
In the practical implementation process, the exclusive search volume in common search space or terminal of descending sub frame can be selected Indication message is placed in present embodiment base station 10, thereby is used in combination with prior art.Suppose method according to existing table 1:
Blind check in the common search space during DCI form 1A, is adopted the diversity mode demodulating data in Indication message when terminal 20;
Blind check in exclusive search volume, terminal during DCI form 1, is adopted the DRS transmission mode demodulating data based on port 5 in Indication message when terminal 20;
When terminal 20 in exclusive search volume, terminal blind check in Indication message during DCI form 1A, through the concrete DRS pattern demodulating data that adopts diversity mode also to be based on port 5 of transmission mode sign identification in the Indication message.
Above-mentioned indicating mode can also change flexibly, in Indication message, during DCI form 1, adopts the diversity mode demodulating data such as being set at terminal 20 blind check in the common search space; Terminal 20 blind check in exclusive search volume, terminal during DCI form 1A, is adopted the DRS transmission mode demodulating data based on port 5 in Indication message; Terminal 20 in the common search space blind check in Indication message during DCI form 1A, through the concrete DRS pattern demodulating data that adopts diversity mode also to be based on port 5 of transmission mode sign identification in the Indication message.
Specifically can set according to concrete needs, but must guarantee that the mode of setting in base station 10 and terminal 20 is identical with which kind of mode.
As shown in Figure 2, embodiment of the invention base station comprises: sign determination module 100, generation module 110 and sending module 120.
Sign determination module 100 is used for the corresponding relation according to predefined transmission mode sign and transmission mode, and confirming need be to the corresponding transmission mode sign of the transmission mode of terminal appointment.
Generation module 110 is used to generate and contains Downlink Control Information and identify the Indication message that determination module 100 definite transmission modes identify.
Sending module 120 is used for sending the Indication message that generation module 110 generates through the physical layer descending control channel to the terminal.
Wherein, The transmission mode sign can be CRC (Cyclic Redundancy Check; CRC) mask, then sending module 120 will comprise the Indication message of the CRC bit after Downlink Control Information and the scrambling process, send to the terminal through the physical layer descending control channel.
CRC bit after the scrambling process is that the CRC bit of 110 pairs of Downlink Control Information of generation module carries out scrambling and obtains; Concrete; Generation module 110 can add the CRC bit of Downlink Control Information earlier after Downlink Control Information; Generate Indication message, and then according to RNTI (Radio NetworkTemporary Identity, Radio Network Temporary Identifier) (RNTI can be C-RNTI or SPS-C-RNTI) and CRC mask the CRC bit of Downlink Control Information is carried out scrambling process respectively; Also can be earlier the CRC bit of Downlink Control Information be carried out scrambling process, after Downlink Control Information, add the CRC bit of the Downlink Control Information after the scrambling process then, generate Indication message according to RNTI and CRC mask.
Wherein, generation module 110 carries out scrambling process according to RNTI and CRC mask to the CRC bit can also carry out scrambling process according to RNTI to the CRC bit earlier, and then according to the CRC mask CRC bit that carries out after the scrambling process is carried out the secondary scrambling process; Also can carry out scrambling process according to the CRC mask to the CRC bit earlier, and then the CRC bit that carries out after the scrambling process carried out the secondary scrambling process according to RNTI.
Earlier the CRC bit is carried out scrambling process with generation module 110 below according to RNTI and CRC mask; After Downlink Control Information, add the CRC bit after the scrambling process then; Generate Indication message; And earlier the CRC bit is carried out scrambling process, and then carries out the secondary scrambling process and describe carrying out CRC bit after the scrambling process according to the CRC mask according to RNTI:
Suppose that the DCI bit is: a
0, a
1, a
2, a
3..., a
A-1, the CRC bit is: p
0, p
1, p
2, p
3..., p
L-1, A is the DCI number of bits, L is the CRC bit number, L=16
Then the CRC bit is added on after the DCI bit, forms output sequence:
X＝b
0，b
1，b
2，b
3，......，b
B-1
Wherein, B=A+L;
b
k＝a
k，k＝0，1，2，...，A-1；
b
k＝p
k-A，k＝A，A+1，A+2，...，A+L-1。
Then further using the exclusive RNTI in terminal (is x
Rnti, 0, x
Rnti, 1..., x
Rnti, 15) the CRC bit is carried out scrambling, form output sequence c
k:
c
k＝b
k，k＝0，1，2，...，A-1；
c
k＝(b
k+x
rnti，k-A)mod?2，k＝A，A+1，A+2，...，A+15。
Further use CRC mask, i.e. CRC mask (x
Tm, 0, x
Tm, 1..., x
Tm, 15) the CRC bit is carried out the secondary scrambling, form output sequence c
k:
c
k＝b
k，k＝0，1，2，...，A-1；
c
k＝(b
k+x
rnti，k-A+x
tm，k-A)mod?2，k＝A，A+1，A+2，...，A+15。
In the practical implementation process, can confirm x according to the corresponding relation in table 3 or the table 4
Tm, 0, x
Tm, 1..., x
Tm, 15Value.
| Traffic pattern (UE transmit mode selection) | CRC mask value (Transmit mode selection mask) x tm，0，x tm，1，...，x tm，15 |
| The transmission mode Transmit diversity of transmit diversity | <0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0> |
| The DRS transmission mode Single antenna port of port 5, port5 | <0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，1> |
Table 3
| Traffic pattern (UE transmit mode selection) | CRC mask value (Transmit mode selection mask) x tm，0，x tm，1，...，x tm，15 |
| The transmission mode of transmit diversity (Transmit diversity) | <0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0> |
| The DRS transmission mode of port 5 (Single antenna port, port5) | <1，1，1，1，1，1，1，1，1，1，1，1，1，1，1，1> |
Table 4
Which kind of transmission mode the terminal just can confirm to adopt according to the value of the CRC mask of receiving like this.
Above-mentioned is 16 to describe with the CRC bit number just, and the mode of the CRC bit of other numerical value is similar in above-mentioned mode, repeats no more.
Need to prove that numerical value and corresponding relation in table 3 and the table 4 just illustrate, in the practical implementation process, logarithm value and corresponding relation change as required.
To the corresponding relation of table 3, present embodiment is under the 7th kind of transmission mode situation, and various corresponding relations are referring to table 5.
Table 5
According to the corresponding relation that table 5 is set, blind check is in Indication message during DCI form 1 in exclusive search volume, terminal or in the exclusive search volume, terminal for indicating terminal, and the CRC mask is: 0,0,0,0,0; 0,0,0,0,0,0; 0,0,0,0,0, then adopt the diversity mode demodulating data;
Indicating terminal blind check in exclusive search volume, terminal during DCI form 1, is adopted the DRS pattern demodulating data based on port 5 in Indication message;
Blind check is in Indication message during DCI form 1A in exclusive search volume, terminal for indicating terminal, and the CRC mask is: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1, then adopt DRS pattern demodulating data based on port 5.
Perhaps to the corresponding relation of table 3, present embodiment is under the 7th kind of transmission mode situation, and various corresponding relations are referring to table 6.
Table 6
According to the corresponding relation that table 6 is set, as long as DCI form 1A in the Indication message is received at the terminal, just confirm to adopt which kind of pattern demodulating data according to the CRC mask, do not need to judge again in which kind of space to search.Concrete:
Indicating terminal is no matter blind check is in Indication message during DCI form 1A in what space, and the CRC mask is: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, then adopt the diversity mode demodulating data;
Indicating terminal is no matter blind check is in Indication message during DCI form 1A in what space, and the CRC mask is: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1, then adopt the DRS pattern demodulating data of port 5;
Indicating terminal blind check in exclusive search volume, terminal during DCI form 1, is adopted the DRS pattern demodulating data based on port 5 in Indication message.
To the corresponding relation of table 4, present embodiment is under the 7th kind of transmission mode situation, and various corresponding relations are referring to table 7.
Table 7
According to the corresponding relation that table 7 is set, blind check is in Indication message during DCI form 1 in exclusive search volume, terminal or in the exclusive search volume, terminal for indicating terminal, and the CRC mask is: 0,0,0,0,0; 0,0,0,0,0,0; 0,0,0,0,0, then adopt the diversity mode demodulating data;
Indicating terminal blind check in exclusive search volume, terminal during DCI form 1, is adopted the DRS pattern demodulating data based on port 5 in Indication message;
Blind check is in Indication message during DCI form 1A in exclusive search volume, terminal for indicating terminal, and the CRC mask is: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, then adopt DRS pattern demodulating data based on port 5.
Perhaps to the corresponding relation of table 4, present embodiment is under the 7th kind of transmission mode situation, and various corresponding relations are referring to table 8.
Table 8
According to the corresponding relation that table 8 is set, as long as DCI form 1A in the Indication message is received at the terminal, just confirm to adopt which kind of pattern demodulating data according to the CRC mask, do not need to judge again in which kind of space to search.Concrete:
Indicating terminal is no matter blind check is in Indication message during DCI form 1A in what space, and the CRC mask is: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, then adopt the diversity mode demodulating data;
Indicating terminal is no matter blind check is in Indication message during DCI form 1A in what space, and the CRC mask is: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, then adopt the DRS pattern demodulating data of port 5;
Indicating terminal blind check in exclusive search volume, terminal during DCI form 1, is adopted the DRS pattern demodulating data based on port 5 in Indication message.
Wherein, identical table must be adopted with the terminal in the base station, could guarantee that the base station is correct transmission mode, specifically can be implemented in the agreement and stipulates; Also can send message, inform which table the terminal adopts to the terminal.
Above mode in each table make the DRS transmission mode can be corresponding DCI form 1 and DCI form 1A.Certainly, content that also can map table makes that diversity mode can corresponding DCI form 1 and DCI form 1A.
Need to prove, above corresponding relation (being corresponding search space and CRC mask) in each table just illustrate, in the practical implementation process, can be as required change top each corresponding relation in showing.
The transmission mode sign can also be distinguished concrete transmission mode (such as 0 expression diversity mode through bit (for example 1bit) is set in DCI; 1 expression is based on the DRS pattern of port 5), then generation module 110 can further include: first processing module 1100 and second processing module 1110.
First processing module 1100, the transmission mode sign that is used for sign determination module 100 is confirmed places Downlink Control Information.
Second processing module 1110 is used to generate the Indication message that contains the Downlink Control Information after first processing module 1100 is handled.
Need to prove; Adopt and mode that bit distinguishes concrete transmission mode to be set in the DCI and to adopt the CRC mask to distinguish the mode of concrete transmission mode similar; 1bit transmission mode indicating bit for example is set in DCI form 1A; Then UE in the common search space or terminal exclusive search volume blind check to DCI form 1A; All know concrete transmission mode through transmission mode indicating bit wherein, (promptly adopting the similar content in above-mentioned table 6 or the table 8), concrete execution mode repeats no more at this.
In the practical implementation process, can adopt which kind of mode to distinguish concrete transmission mode according to the agreement regulation; Also can inform the terminal through message.
As shown in Figure 3, embodiment of the invention terminal comprises: transmission mode determination module 200 and demodulation module 210.
Transmission mode determination module 200; Be used for according to the transmission mode sign of setting up in advance and the corresponding relation of transmission mode; In the Indication message of confirming to receive that comprises Downlink Control Information and transmission mode sign from the base station, the corresponding transmission mode of this transmission mode sign.
The corresponding relation of transmission mode sign and transmission mode can be referring to table 5 and table 6.
Need to prove that table 5 and table 6 just illustrate, in the practical implementation process, the corresponding relation in his-and-hers watches 5 and the table 6 changes as required, and certainly, the variation in this table need be consistent with the base station.
Concrete which table that adopts can be stipulated in agreement; Also can confirm according to message from the base station.
Demodulation module 210 is used for the transmission mode demodulating data of confirming according to transmission mode determination module 200.
Wherein, the terminal of the embodiment of the invention can further include: trigger module 220.
Trigger module 220 is used for the Indication message received according to transmission mode determination module 200, when confirming to satisfy executive condition, triggers the transmission mode demodulating data that demodulation module 210 is confirmed according to transmission mode determination module 200.
Executive condition is to set (if adopt table 5 such as the corresponding relation of transmission mode sign and transmission mode, then setting according to table 5) according to the content in the above-mentioned table, if the content in the above-mentioned table changes, then executive condition is also corresponding changes.Such as the example that provides according to present table 5, executive condition can search Indication message for transmission mode determination module 200 in exclusive search volume, and during the DCI form 1A in the Indication message, triggers demodulation module 210.
If do not satisfy executive condition, suppose to adopt table 5 content setting executive condition, if in exclusive search volume, terminal blind check DCI form 1 in the Indication message, then trigger module 220 triggers the DRS pattern demodulating data that demodulation modules 210 adopt based on port 5.
In the practical implementation process, if the base station adopts the CRC mask to distinguish concrete transmission mode, then the CRC mask (being the CRC mask of scrambling CRC bit) of DCI form in the Indication message is checked at the terminal; Distinguish concrete transmission mode if in the base station employing DCI bit is set, then the bit that is provided with in the DCI in the Indication message is checked at the terminal.
As shown in Figure 4, the method for embodiment of the invention indicating transmission mode comprises the following steps:
Wherein, can further include after the step 401:
Wherein, the corresponding relation of transmission mode sign and transmission mode can adopt database or file or other forms to store, and can store into respectively in base station and the terminal, also can store into to supply base station and terminal to search in other entities.
Need to prove that the transmission mode sign that use the base station and the corresponding relation of transmission mode must identify identical with the corresponding relation of transmission mode with the transmission mode that use at the terminal.
In the practical implementation process, the exclusive search volume in common search space or terminal of descending sub frame can be selected Indication message is placed in the present embodiment base station, thereby is used in combination with prior art.Suppose method according to existing table 1:
Blind check in the common search space during DCI form 1A, is adopted the diversity mode demodulating data in Indication message when the terminal;
Blind check in exclusive search volume, terminal during DCI form 1, is adopted the DRS transmission mode demodulating data based on port 5 in Indication message when the terminal;
When the terminal in exclusive search volume, terminal blind check in Indication message during DCI form 1A, through the concrete DRS pattern demodulating data that adopts diversity mode also to be based on port 5 of transmission mode sign identification in the Indication message.
The base station can be selected the mode of indicating transmission mode flexibly according to the capacity of the exclusive search volume in current common search space and terminal like this.
Above-mentioned indicating mode can also change flexibly, in Indication message, during DCI form 1, adopts the diversity mode demodulating data such as being set at terminal blind check in the common search space; Terminal blind check in exclusive search volume, terminal during DCI form 1A, is adopted the DRS transmission mode demodulating data based on port 5 in Indication message; The terminal in the common search space blind check in Indication message during DCI form 1A, through the concrete DRS pattern demodulating data that adopts diversity mode also to be based on port 5 of transmission mode sign identification in the Indication message.
Specifically can set according to concrete needs, but must guarantee that the mode of setting in base station and terminal is identical with which kind of mode.
Wherein, the transmission mode sign can be the CRC mask, and then in the step 401, the Indication message that the base station will comprise the CRC bit after Downlink Control Information and the scrambling process sends to the terminal through the physical layer descending control channel.
CRC bit after the scrambling process is that the CRC bit to Downlink Control Information carries out scrambling and obtains; Concrete; Can after Downlink Control Information, add the CRC bit of Downlink Control Information earlier; Generate Indication message, and then according to RNTI and CRC mask the CRC bit of Downlink Control Information is carried out scrambling process respectively; Also can be earlier the CRC bit of Downlink Control Information be carried out scrambling process, after Downlink Control Information, add the CRC bit of the Downlink Control Information after the scrambling process then, generate Indication message according to RNTI and CRC mask.
Wherein, According to RNTI (RNTI can be C-RNTI or SPS-C-RNTI) and CRC mask the CRC bit is carried out scrambling process and can also carry out scrambling process according to RNTI to the CRC bit earlier, and then the CRC bit that carries out after the scrambling process is carried out the secondary scrambling process according to the CRC mask; Also can carry out scrambling process according to the CRC mask to the CRC bit earlier, and then the CRC bit that carries out after the scrambling process carried out the secondary scrambling process according to RNTI.
Below according to RNTI and CRC mask the CRC bit is carried out scrambling process earlier; After Downlink Control Information, add the CRC bit after the scrambling process then; Generate Indication message; And earlier the CRC bit is carried out scrambling process, and then carries out the secondary scrambling process and describe carrying out CRC bit after the scrambling process according to the CRC mask according to RNTI:
Suppose that the DCI bit is: a
0, a
1, a
2, a
3..., a
A-1, the CRC bit is: p
0, p
1, p
2, p
3..., p
L-1, A is the DCI number of bits, L is the CRC bit number, L=16
Then the CRC bit is added on after the DCI bit, forms output sequence:
X＝b
0，b
1，b
2，b
3，......，b
B-1
Wherein, B=A+L;
b
k＝a
k，k＝0，1，2，...，A-1；
b
k＝p
k-A，k＝A，A+1，A+2，...，A+L-1。
Then further using the exclusive RNTI in terminal (is x
Rnti, 0, x
Rnti, 1..., x
Rnti, 15) the CRC bit is carried out scrambling, form output sequence c
k:
c
k＝b
k，k＝0，1，2，...，A-1；
c
k＝(b
k+x
rnti，k-A)mod?2，k＝A，A+1，A+2，...，A+15。
Further use CRC mask, i.e. CRC mask (x
Tm, 0, x
Tm, 1..., x
Tm, 15) the CRC bit is carried out the secondary scrambling, form output sequence c
k:
c
k＝b
k，k＝0，1，2，...，A-1；
c
k＝(b
k+x
rnti，k-A+x
tm，k-A)mod?2，k＝A，A+1，A+2，...，A+15。
In the practical implementation process, can confirm x according to the corresponding relation in table 3 or the table 4
Tm, 0, x
Tm, 1..., x
Tm, 15Value.
Which kind of transmission mode the terminal just can confirm to adopt according to the value of the CRC mask of receiving like this.
Above-mentioned is 16 to describe with the CRC bit number just, and the mode of the CRC bit of other numerical value is similar in above-mentioned mode, repeats no more.
Need to prove that numerical value and corresponding relation in table 3 and the table 4 just illustrate, in the practical implementation process, logarithm value and corresponding relation change as required.
To the corresponding relation of table 3, present embodiment is under the 7th kind of transmission mode situation, and various corresponding relations are referring to table 5.
According to the corresponding relation that table 5 is set, blind check is in Indication message during DCI form 1 in exclusive search volume, terminal or in the exclusive search volume, terminal for indicating terminal, and the CRC mask is: 0,0,0,0,0; 0,0,0,0,0,0; 0,0,0,0,0, then adopt the diversity mode demodulating data;
Indicating terminal blind check in exclusive search volume, terminal during DCI form 1, is adopted the DRS pattern demodulating data based on port 5 in Indication message;
Blind check is in Indication message during DCI form 1A in exclusive search volume, terminal for indicating terminal, and the CRC mask is: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1, then adopt DRS pattern demodulating data based on port 5.
Perhaps to the corresponding relation of table 3, present embodiment is under the 7th kind of transmission mode situation, and various corresponding relations are referring to table 6.
According to the corresponding relation that table 6 is set, as long as DCI form 1A in the Indication message is received at the terminal, just confirm to adopt which kind of pattern demodulating data according to the CRC mask, do not need to judge again in which kind of space to search.Concrete:
Indicating terminal is no matter blind check is in Indication message during DCI form 1A in what space, and the CRC mask is: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, then adopt the diversity mode demodulating data;
Indicating terminal is no matter blind check is in Indication message during DCI form 1A in what space, and the CRC mask is: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1, then adopt the DRS pattern demodulating data of port 5;
Indicating terminal blind check in exclusive search volume, terminal during DCI form 1, is adopted the DRS pattern demodulating data based on port 5 in Indication message.
To the corresponding relation of table 4, present embodiment is under the 7th kind of transmission mode situation, and various corresponding relations are referring to table 7.
According to the corresponding relation that table 6 is set, blind check is in Indication message during DCI form 1 in exclusive search volume, terminal or in the exclusive search volume, terminal for indicating terminal, and the CRC mask is: 0,0,0,0,0; 0,0,0,0,0,0; 0,0,0,0,0, then adopt the diversity mode demodulating data;
Indicating terminal blind check in exclusive search volume, terminal during DCI form 1, is adopted the DRS pattern demodulating data based on port 5 in Indication message;
Blind check is in Indication message during DCI form 1A in exclusive search volume, terminal for indicating terminal, and the CRC mask is: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, then adopt DRS pattern demodulating data based on port 5.
Perhaps to the corresponding relation of table 4, present embodiment is under the 7th kind of transmission mode situation, and various corresponding relations are referring to table 8.
According to the corresponding relation that table 8 is set, as long as DCI form 1A in the Indication message is received at the terminal, just confirm to adopt which kind of pattern demodulating data according to the CRC mask, do not need to judge again in which kind of space to search.Concrete:
Indicating terminal is no matter blind check is in Indication message during DCI form 1A in what space, and the CRC mask is: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, then adopt the diversity mode demodulating data;
Indicating terminal is no matter blind check is in Indication message during DCI form 1A in what space, and the CRC mask is: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, then adopt the DRS pattern demodulating data of port 5;
Indicating terminal blind check in exclusive search volume, terminal during DCI form 1, is adopted the DRS pattern demodulating data based on port 5 in Indication message.
Wherein, identical table must be adopted with the terminal in the base station, could guarantee that the base station is correct transmission mode, specifically can be implemented in the agreement and stipulates; Also can send message, inform which table the terminal adopts to the terminal.
Above mode in each table make the DRS transmission mode can be corresponding DCI form 1 and DCI form 1A.Certainly, content that also can map table makes that diversity mode can corresponding DCI form 1 and DCI form 1A.
Need to prove, above corresponding relation (being corresponding search space and CRC mask) in each table just illustrate, in the practical implementation process, can be as required change top each corresponding relation in showing.
The transmission mode sign can also be distinguished concrete transmission mode (such as 0 expression diversity mode through bit (for example 1bit) is set in DCI; 1 expression is based on the DRS pattern of port 5); Then the base station places Downlink Control Information with the transmission mode sign of confirming in the step 401, and generation contains the Indication message of the Downlink Control Information after the processing.
Need to prove; Adopt and mode that bit distinguishes concrete transmission mode to be set in the DCI and to adopt the CRC mask to distinguish the mode of concrete transmission mode similar; 1bit transmission mode indicating bit for example is set in DCI form 1A; Then UE in the common search space or terminal exclusive search volume blind check to DCI form 1A; All know concrete transmission mode through transmission mode indicating bit wherein, (promptly adopting the similar content in above-mentioned table 6 or the table 8), concrete execution mode repeats no more at this.
In the practical implementation process, can adopt which kind of mode to distinguish concrete transmission mode according to the agreement regulation; Also can inform the terminal through message.
Wherein, can further include before the step 403:
Executive condition is confirmed to satisfy according to the Indication message of receiving in the terminal
In the practical implementation process; Executive condition is to set (if adopt table 5 such as the corresponding relation of transmission mode sign and transmission mode according to the content in the above-mentioned table; Then set according to table 5), if the content in the above-mentioned table changes, then executive condition is also corresponding changes.Such as the example that provides according to present table 5, executive condition can be for searching Indication message in exclusive search volume, and during the DCI form 1A in the Indication message, according to the corresponding transmission mode demodulating data of transmission mode sign in the Indication message.
If do not satisfy executive condition, suppose to adopt table 5 content setting executive condition, if in exclusive search volume, terminal blind check DCI form 1 in the Indication message, then, adopt DRS pattern demodulating data based on port 5 according to the content of table 5.
In the practical implementation process, if the base station adopts the CRC mask to distinguish concrete transmission mode, then the CRC mask (being the CRC mask of scrambling CRC bit) of DCI form in the Indication message is checked at the terminal; Distinguish concrete transmission mode if in the base station employing DCI bit is set, then the bit that is provided with in the DCI in the Indication message is checked at the terminal.
From the foregoing description, can find out: embodiment of the invention base station is according to the corresponding relation of predefined transmission mode sign and transmission mode, and confirming need be to the corresponding transmission mode sign of the transmission mode of terminal appointment; Said base station generates the Indication message that contains Downlink Control Information and the transmission mode sign of confirming; Send said Indication message through the physical layer descending control channel to the terminal, be used to indicate said terminal at the corresponding transmission mode demodulating data of said transmission mode sign.Since can be through the sign of the transmission mode in the Indication message, the transmission mode that indication is corresponding makes transmission mode 7 can support diversity mode and DRS transmission mode simultaneously in any scene, has improved the range of application and the systematic function of transmission mode 7.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. the method for an indicating transmission mode is characterized in that, this method comprises:
The base station is according to the corresponding relation of predefined transmission mode sign and transmission mode, and confirming need be to the corresponding transmission mode sign of the transmission mode of terminal appointment, and wherein said transmission mode is designated the cyclic redundancy check (CRC) mask;
Said base station generates the Indication message that contains Downlink Control Information and the CRC mask of confirming; The Indication message that will comprise the CRC bit after Downlink Control Information and the scrambling process; Send to the terminal through the physical layer descending control channel, be used to indicate said terminal at the corresponding transmission mode demodulating data of said transmission mode sign;
Wherein, the CRC bit after the said scrambling process is that said base station is carried out scrambling process according to Radio Network Temporary Identifier RNTI and said CRC mask to the CRC bit of Downlink Control Information respectively and obtained.
2. the method for claim 1 is characterized in that, this method also comprises:
Said terminal is according to the corresponding relation of said transmission mode sign and transmission mode, and the transmission mode in the said Indication message of confirming to receive identifies corresponding transmission mode;
Said terminal is according to the transmission mode demodulating data of confirming.
3. method as claimed in claim 2 is characterized in that, said terminal is according to comprising before the transmission mode demodulating data of confirming:
Executive condition is confirmed to satisfy according to the said Indication message of receiving in said terminal.
4. like the described method of the arbitrary claim of claim 1～3, it is characterized in that said base station generates the Indication message that contains Downlink Control Information and the transmission mode sign of confirming and comprises:
Said base station places Downlink Control Information with the transmission mode sign of confirming, generation contains the Indication message of the Downlink Control Information after the processing.
5. the system of an indicating transmission mode is characterized in that, this system comprises:
The base station; Be used for corresponding relation according to predefined transmission mode sign and transmission mode; Confirming need be to the corresponding transmission mode sign of the transmission mode of terminal appointment; Wherein said transmission mode is designated the cyclic redundancy check (CRC) mask, generates the Indication message contain Downlink Control Information and the CRC mask of confirming, will comprise the Indication message of the CRC bit after Downlink Control Information and the scrambling process; Send to the terminal through the physical layer descending control channel, be used to indicate said terminal at the corresponding transmission mode demodulating data of said transmission mode sign; Wherein, the CRC bit after the said scrambling process is that said base station is carried out scrambling process according to Radio Network Temporary Identifier RNTI and said CRC mask to the CRC bit of Downlink Control Information respectively and obtained;
The terminal is used for the corresponding relation according to said transmission mode sign and transmission mode, the corresponding transmission mode of transmission mode sign in the said Indication message of confirming to receive, and according to the transmission mode demodulating data of confirming.
6. system as claimed in claim 5 is characterized in that, said base station comprises:
The sign determination module is used for the corresponding relation according to predefined transmission mode sign and transmission mode, and confirming need be to the corresponding transmission mode sign of the transmission mode of terminal appointment;
Generation module is used to generate the Indication message that contains Downlink Control Information and the transmission mode sign of confirming, wherein said transmission mode is designated the cyclic redundancy check (CRC) mask;
Sending module; Be used for to comprise the Indication message of the CRC bit after Downlink Control Information and the scrambling process; Send to the terminal through the physical layer descending control channel, the CRC bit after the said scrambling process is that said generation module carries out the physical layer descending control channel that passes through that scrambling process obtains according to Radio Network Temporary Identifier RNTI and said CRC mask to the CRC bit of Downlink Control Information respectively and sends said Indication message;
Said terminal comprises:
The transmission mode determination module is used for the corresponding relation according to said transmission mode sign and transmission mode, the corresponding transmission mode of transmission mode sign in the said Indication message of confirming to receive;
Demodulation module is used for according to the transmission mode demodulating data of confirming.
7. system as claimed in claim 6 is characterized in that, said base station also comprises:
Trigger module is used for the said Indication message received according to said transmission mode determination module, when confirming to satisfy executive condition, triggers said demodulation module.
8. like claim 6 or 7 described systems, it is characterized in that said generation module comprises:
First processing module, the transmission mode sign that is used for said sign determination module is confirmed places Downlink Control Information;
Second processing module is used to generate the Indication message that contains the Downlink Control Information after the processing.
9. a base station is characterized in that, this base station comprises:
The sign determination module is used for the corresponding relation according to predefined transmission mode sign and transmission mode, and confirming need be to the corresponding transmission mode sign of the transmission mode of terminal appointment;
Generation module is used to generate the Indication message that contains Downlink Control Information and the transmission mode sign of confirming, wherein said transmission mode is designated the cyclic redundancy check (CRC) mask;
Sending module; Be used for to comprise the Indication message of the CRC bit after Downlink Control Information and the scrambling process; Send to the terminal through the physical layer descending control channel, the CRC bit after the said scrambling process is that said generation module carries out scrambling process according to Radio Network Temporary Identifier RNTI and said CRC mask to the CRC bit of Downlink Control Information respectively and obtains.
10. base station as claimed in claim 19 is characterized in that, said generation module comprises:
First processing module, the transmission mode sign that is used for said sign determination module is confirmed places Downlink Control Information;
Second processing module is used to generate the Indication message that contains the Downlink Control Information after the processing.
11. a terminal is characterized in that, this terminal comprises:
The transmission mode determination module is used for the transmission mode sign of basis foundation in advance and the corresponding relation of transmission mode, confirms the transmission mode of receiving from transmission mode sign correspondence in the Indication message that comprises Downlink Control Information and transmission mode sign of base station;
Demodulation module is used for according to the transmission mode demodulating data of confirming;
Wherein, said transmission mode is designated the cyclic redundancy check (CRC) mask; Said Indication message is that send through the physical layer descending control channel said base station; CRC bit after the said scrambling process is that said base station is carried out scrambling process according to Radio Network Temporary Identifier RNTI and said CRC mask to the CRC bit of Downlink Control Information respectively and obtained.
12. terminal as claimed in claim 11 is characterized in that, said base station also comprises:
Trigger module is used for the said Indication message received according to said transmission mode determination module, when confirming to satisfy executive condition, triggers said demodulation module.
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| CN108811141B (en) | 2011-03-31 | 2023-10-24 | 华为技术有限公司 | Subframe configuration method, base station and user equipment in time division duplex system |
| CN102571287B (en) * | 2012-02-08 | 2015-02-25 | 普天信息技术研究院有限公司 | E-PDCCH (Extended Physical Downlink Control Channel) scrambling method and ACK/NACK (Acknowledgement Character/Negative Acknowledgement) transmission method |
| CN104244363B (en) * | 2013-06-07 | 2020-02-04 | 电信科学技术研究院 | Method, terminal and system for detecting discovery message |
| CN105515724B (en) * | 2014-09-26 | 2019-02-05 | 中国移动通信集团公司 | A method, device, system and related equipment for network-assisted terminal blind detection |
| US20180220465A1 (en) * | 2015-11-24 | 2018-08-02 | Lei Zhang | Method for reporting transmission mode and ue |
| CN107734710B (en) | 2016-08-11 | 2023-05-05 | 中兴通讯股份有限公司 | Method and device for data transmission |
| CN107733602B (en) * | 2016-08-12 | 2022-05-10 | 华为技术有限公司 | A kind of control information transmission method and device |
| CN107896389A (en) * | 2016-09-29 | 2018-04-10 | 华为技术有限公司 | A kind of method and apparatus for data transfer |
| CN108024382B (en) * | 2016-11-04 | 2022-11-15 | 中兴通讯股份有限公司 | Control information transmission method and device and communication node |
| WO2019213928A1 (en) * | 2018-05-11 | 2019-11-14 | 华为技术有限公司 | Transmission scheme indication method and device |
| CN110933764B (en) | 2018-09-20 | 2022-03-11 | 维沃移动通信有限公司 | Transmission method of transmission indication signal, network equipment and terminal |
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