CN102447538A - Downlink control information transmission method and system - Google Patents
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Abstract
The invention relates to a method and a system for transmitting downlink control information, wherein the method comprises the following steps: the network side issues at least two pieces of downlink control information related to the preset service data to the user equipment, wherein the downlink control information carries the indication information of the Transmission Time Interval of the preset service data; and the user equipment receives and analyzes the downlink control information. The method and the system for transmitting the downlink control information increase the probability of successfully receiving the downlink control information by the user equipment and improve the coverage performance of the downlink control channel.
Description
Technical field
The present invention relates to wireless communication field, be specifically related to the downlink control information transmission method and the system of a kind of long evolving system (LTE).
Background technology
UMTS (Universal Mobile Telecommunications System; Abbreviation UMTS) Long Term Evolution (the Long Term Evolution of land wireless access and Radio Access Network; Abbreviation LTE) belongs to the 4th generation (Fourth Generation is called for short 4G) wireless broad band technology.The LTE system can provide high peak data rate (descending 100Mps, up 50Mps), low time delay (loopback delay 10ms), the operation cost of the power system capacity of improvement and covering and reduction; In addition, it also supports many antennas, packet data transmission efficiently, bandwidth operation (being at most 20MHz) and seamless and integration existing system flexibly.This make efficiently with reliable control channel be designed to essential.Descending particularly (Downlink is called for short DL) control signaling comprises scheduling authorizes, and control format is indicated and mixed automatic repeat requests (Hybrid Automatic Repeat-ReQuest is called for short HARQ) and confirm.
Said LTE system is based on OFDM (Orthogonal Frequency Division Multi-plexing is called for short OFDM), and every downlink frame continues 10ms, comprises 10 sub-frame, and every subframe comprises two time slots, and every time slot comprises 6 or 7 OFDM symbols.Descending control signaling is positioned at the individual OFDM symbol of the top n of every subframe (smaller or equal to 3).Descending control signaling is carried by following three physical channels: Physical Control Format Indicator Channel (Physical Control Format Indicator Channel is called for short PCFICH) is used to indicate be used to the OFDM symbolic number (being said n value) controlled in the subframe; Physical HARQ Indicator Channel (Physical HARQ Indicator Channel is called for short PHICH) carries the descending ack/nack relevant with transmitting uplink data and confirms (Acknowledgement/Negative Acknowledge is called for short ACK/NACK); Physical Downlink Control Channel (Physical Downlink Control Channel is called for short PDCCH), the bearing downlink scheduling distributes with uplink scheduling authorizes.Every subframe has a plurality of PDCCH, and subscriber equipment (User Equipment is called for short UE) if be scheduled, can be assigned with one or more PDCCH.Wherein, The minimum unit of PDCCH transmission is control channel unit (Control Channel Element; Be called for short CCE), a PDCCH comprises one or more CCE, and every CCE comprises 9 resource unit group (Resource Element Group; Be called for short REG), every REG comprises 4 non-pilot resources unit or subcarrier.QPSK (Quadrature Phase Shift Keying is called for short QPSK) always is used to PDCCH, and therefore, a CCE comprises 72 coded-bits.Every PDCCH carries the information with different payload sizes relevant with one or more UE, and can use the Different control form to transmit.UE passes through the different PDCCH form of mode real time monitoring of blind Detecting, and detects and own relevant PDCCH.
Cover about the LTE down control channel, existing simulation result shows that the PHICH covering performance is optimum, secondly is PCFICH, is PDCCH at last, i.e. the covering of LTE down control channel is subject to PDCCH.Similarly, existing other wireless communication system also exists specific down control channel to cover limited problem.
Summary of the invention
The technical problem that the present invention will solve provides a kind of downlink control information transmission method and system covers limited problem to solve down control channel.
For solving above technical problem, the invention provides a kind of downlink control information transmission method, this method comprises:
Network side issues at least two Downlink Control Information relevant with the intended service data to subscriber equipment, wherein carries the said intended service data transmission period indication information of (TTI) at interval;
Said subscriber equipment receives and resolves said Downlink Control Information.
Further, said network side is after subscriber equipment issues said Downlink Control Information, and this method also comprises: said network side issues or receives said intended service data from subscriber equipment to subscriber equipment according to said Downlink Control Information.
Further, after said subscriber equipment successfully received and resolve at least one said Downlink Control Information, this method also comprised: according to said Downlink Control Information, send said intended service data from the network side reception or to network side.
Alternatively, said Downlink Control Information sends through Physical Downlink Control Channel (PDCCH).
Alternatively, said indication information is the absolute position or the relative position of Transmission Time Interval.
Further, said network side issues said Downlink Control Information at the Transmission Time Interval and/or the Transmission Time Interval before that send said intended service data.
Said indication information adopts a bit to represent, wherein the next Transmission Time Interval of " 1 " expression issues said intended service data, and " 0 " expression current transmission time interval issues said intended service data; Or,
Said indication information adopts two bits to represent; Wherein second transmission time after " 10 " expression issues said intended service data; The next Transmission Time Interval of " 01 " expression issues said intended service data, and " 00 " expression current transmission time interval issues said intended service data.
Issue said Downlink Control Information when preferably, said network side is judged arbitrary condition below satisfying:
The broad-band channel quality indication (CQI) of said subscriber equipment feedback is less than broad-band channel quality indication thresholding; Or,
On the corresponding uplink HARQ feedback channel of downlink service data, can not detect any signal; Or,
On reverse link traffic channel, can not detect any signal.
For solving above technical problem, the present invention also provides a kind of Downlink Control Information transmission system, and this system comprises:
The Downlink Control Information sending module of network side is used for issuing at least two Downlink Control Information relevant with the intended service data to subscriber equipment, wherein carries the said intended service data transmission period indication information of (TTI) at interval;
The control information of subscriber equipment receives parsing module, is used for receiving and resolving said Downlink Control Information.
Further; Said indication information is the absolute position or the relative position of Transmission Time Interval, and the Downlink Control Information sending module of said network side issues said Downlink Control Information at the Transmission Time Interval and/or the Transmission Time Interval before that send said intended service data.
Preferably, said indication information adopts a bit to represent, wherein the next Transmission Time Interval of " 1 " expression issues said intended service data, and " 0 " expression current transmission time interval issues said intended service data; Or,
Said indication information adopts two bits to represent; Wherein second transmission time after " 10 " expression issues said intended service data; The next Transmission Time Interval of " 01 " expression issues said intended service data, and " 00 " expression current transmission time interval issues said intended service data.
Issue said Downlink Control Information during arbitrary condition below preferably, the Downlink Control Information sending module of said network side judge to satisfy:
The broad-band channel quality indication (CQI) of said subscriber equipment feedback is less than broad-band channel quality indication thresholding; Or,
On the corresponding uplink HARQ feedback channel of downlink service data, can not detect any signal; Or,
On reverse link traffic channel, can not detect any signal.
The present invention is through sending at least two Downlink Control Information relevant with the intended service data in one or more TTI scopes; Increased the probability that subscriber equipment (UE) successfully receives the Downlink Control Information relevant with said intended service data; Thereby improved the covering performance of down control channel further, finally realized the covering balance of different down control channels.
Description of drawings
Fig. 1 is the sketch map of downlink control information transmission method of the present invention;
Fig. 2 is two sketch mapes that PDCCH is sent out at same TTI;
Fig. 3 is two sketch mapes that PDCCH is sent out in different TTI;
Fig. 4 is three sketch mapes that PDCCH is sent out in different TTI;
Fig. 5 is a sketch map that PDCCH is sent out at specific T TI;
Fig. 6 is the sketch map of Downlink Control Information transmission system of the present invention.
Embodiment
As shown in Figure 1, downlink control information transmission method of the present invention comprises:
Step 101: network side issues at least two Downlink Control Information relevant with the intended service data to subscriber equipment, wherein carries the said intended service data transmission period indication information of (Transmission Time Internal, abbreviation TTI) at interval.
Said network side comprises to the condition that subscriber equipment issues said Downlink Control Information:
The broad-band channel quality indication (CQI) of said subscriber equipment feedback is less than broad-band channel quality indication thresholding; Or, on the corresponding uplink HARQ feedback channel of downlink service data, can not detect any signal; Or, on reverse link traffic channel, can not detect any signal.
Said indication information comprises absolute position (like the index of TTI) or the relative position (like the space-number of the TTI that sends said intended service data and Downlink Control Information) of TTI.
The TTI that said network side issues said Downlink Control Information to subscriber equipment is no more than the TTI of said intended service data, and particularly, said network side issues said Downlink Control Information at the TTI and/or the TTI before that send said intended service data.Understandably, said Downlink Control Information is in TTI identical or inequality with the intended service data.
Intelligible; If the indication information of said intended service data TTI; The relative position mode of employing TTI is represented the TTI of said intended service data, and the descending control signaling (indication information that comprises said intended service data TTI) that then two or more Downlink Control Information of being in identical TTI relevant with the intended service data carry is identical; Two or more Downlink Control Information of being in different TTI relevant with the intended service data, the indication information of the said intended service data TTI of carrying is inequality, and other descending control signaling of carrying is identical.
Said network side also comprises after subscriber equipment issues said Downlink Control Information: network side issues or receives said intended service data from subscriber equipment to subscriber equipment according to said Downlink Control Information.
Preferably, said Downlink Control Information sends through the physical channel (like the Physical Downlink Control Channel (PDCCH) of LTE system) of bearing downlink control signaling.
Step 102: said subscriber equipment receives and resolves said Downlink Control Information.
Said subscriber equipment successfully receives and resolves after at least one said Downlink Control Information, also comprises: according to said Downlink Control Information, send said intended service data from the network side reception or to network side.
The present invention is through sending at least two Downlink Control Information relevant with the intended service data in one or more TTI scopes; Increased the probability that subscriber equipment (UE) successfully receives the Downlink Control Information relevant with said intended service data; Thereby improved the covering performance of down control channel further, finally realized the covering balance of different down control channels.
Hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
PDCCH channel with the LTE system is an example.Explain that in following examples, the PDCCH payload is equivalent to Downlink Control Information.
Table 1 is specially LTE Downlink Control Information (Downlink Control Information is called for short DCI) form 1a for the payload example of the descending control signaling that issues through PDCCH, and is as shown in table 1.
Table 1 DCI form 1a
| The carrier wave indication | The member carrier of indication bearer service data |
| Form 0/ form 1a diacritics | - |
| The virtual resource blocks assignment flag | Indicate centralized or distributed resource allocation |
| Resource block assignments | The logical resource position that indication distributes |
| Modulation and Coding Scheme | Indicating modulation mode and code rate |
| HARQ process numbering | - |
| New data indicator | The indicating services data are new data or data retransmission |
| Redundancy versions | The first position of data in whole coded data that passes or retransmit of indication |
| The PUCCH power control command | - |
| The detection reference signal request | - |
| Intended service data TTI indication information | The position of indicating predetermined business datum place TTI |
PUCCH is that Physical Uplink Control Channel (Physical Uplink Control Channel) is called for short in the last table.
Embodiment one
The serving BS of supposing UE1 is B1, and current B1 is the UE1 service data transmission, and UE1 is to B1 feedback broad-band channel quality indication (Channel Quality Indicator is called for short CQI) information, and the known predetermined broad-band channel quality indication of B1 thresholding (is designated as Thresh
CQI).Particularly; Said broad-band channel quality indication comprises Signal to Interference plus Noise Ratio (Signal to Interference and Noise Ratio; Be called for short SINR) indication, Modulation and Coding Scheme (Modulation Coding Scheme is called for short MCS) indication and other can be converted into the indication of the parameter of SINR.
Present embodiment thinks that for the time being said CQI is equivalent to said Signal to Interference plus Noise Ratio indication.
Particularly, suppose that the CQI that UE1 feeds back is designated as CQI
UE1, and base station B1 judges CQI
UE1Less than said thresholding Thresh
CQIValue, the transmission method of the PDCCH of employing shown in Fig. 2 or 3.Particularly, as shown in Figure 2, in the 2nd TTI scope; The PDCCH relevant with the UE1 business datum has been sent out two; And the payload of two PDCCH that send is identical, and wherein, the indication information of the user apparatus service data TTI of the payload of two PDCCH of said transmission comprises 1 bit; And all be set to " 0 ", represent that current TTI comprises the business datum relevant with UE1; When UE1 at least successfully received and resolve one of them said PDCCH, UE1 can correctly obtain and detect relative downlink service data, perhaps sends relative uplink business data.Particularly; Shown in accompanying drawing 3, the PDCCH relevant with the UE1 business datum has been sent out one respectively in the 2nd and the 3rd TTI scope, and the promptly said PDCCH relevant with the UE1 business datum has been sent out two in two continuous TTI scopes; And the payload of two PDCCH of said transmission other field except that the indication information of user apparatus service data TTI is identical; Wherein, the indication information of user apparatus service data TTI comprises 1 bit, and the indication information of the user apparatus service data TTI of the PDCCH payload in the 2nd TTI scope; Be set to " 1 "; Represent that next TTI comprises the business datum relevant with UE1, and current TTI does not comprise the business datum relevant with UE1, the indication information of the user apparatus service data TTI of the PDCCH payload in the 3rd TTI scope; Be set to " 0 ", the expression current TTI comprises the business datum relevant with UE1; When UE1 at least successfully received and resolve one of them said PDCCH, UE1 can correctly obtain and detect relative downlink service data or send relative uplink business data.
In addition, the said PDCCH relevant with the business datum of UE1 is not limited to send at the most twice, and the indication information of the user apparatus service data TTI of its payload also is not limited to 1 bit length.For example shown in accompanying drawing 4; The PDCCH relevant with the UE1 business datum has been sent out one respectively in the the 1st, the 2nd and the 3rd TTI; Be that the said PDCCH relevant with the UE1 business datum has been sent out three in three continuous TTI scopes; And payload other field except the indication information of user apparatus service data TTI of three PDCCH that send is identical; Wherein, The indication information of user apparatus service data TTI comprises 2 bits, and the indication information of the user apparatus service data TTI of the PDCCH payload in the 1st TTI scope is set to " 10 ", and expression subsequently the 2nd i.e. the 3rd TTI comprises the business datum relevant with UE1; Current TTI does not comprise the business datum relevant with UE1; The indication information of the user apparatus service data TTI of the PDCCH payload in the 2nd TTI scope is set to " 01 ", representes that subsequently the 1st is that the 3rd TTI comprises the business datum relevant with UE1, and current TTI does not comprise the business datum relevant with UE1; The indication information of the user apparatus service data TTI of the PDCCH payload in the 3rd TTI scope is set to " 00 ", and the expression current TTI comprises the business datum relevant with UE1; When UE1 at least successfully received and resolve one of them said PDCCH, UE1 can correctly obtain and detect relative downlink service data or send relative uplink business data.
Embodiment two
The serving BS of supposing UE1 is B1, and current B1 is the UE1 service data transmission, and UE1 is to B1 feedback broad-band channel quality indication (Channel Quality Indicator is called for short CQI) information, and the known predetermined broad-band channel quality indication of B1 thresholding (is designated as Thresh
CQI).Particularly; Said broad-band channel quality indication comprises Signal to Interference plus Noise Ratio (Signal to Interference and Noise Ratio; Be called for short SINR) indication, Modulation and Coding Scheme (Modulation Coding Scheme is called for short MCS) indication and other can be converted into the indication of the parameter of SINR.
Present embodiment thinks that for the time being said CQI is equivalent to said Signal to Interference plus Noise Ratio indication.
Particularly, suppose that the CQI that UE1 feeds back is designated as CQI
UE1, and base station B1 judges CQI
UE1Be not less than said thresholding Thresh
CQIBe worth, adopt the transmission method of PDCCH as shown in Figure 5.Particularly; As shown in Figure 5, in the 2nd TTI scope, the PDCCH relevant with the UE1 business datum has been sent out one; Wherein, The indication information of the user apparatus service data TTI of the payload of the said PDCCH relevant with the UE1 business datum only comprises 1 bit, and is set to " 0 ", and the expression current TTI comprises the business datum relevant with UE1; When UE1 successfully received and resolve said unique PDCCH, UE1 can correctly obtain and detect relative downlink service data or send relative uplink business data.In addition, the indication information of the user apparatus service data TTI of said PDCCH payload also is not limited to 1 bit length.Particularly, the indication information of the user apparatus service data TTI of the payload of said PDCCH comprises 2 bits and is set to " 00 ", and the expression current TTI comprises the business datum relevant with UE1; When UE1 successfully received and resolve said unique PDCCH, UE1 can correctly obtain and detect relative downlink service data or send relative uplink business data.
Present embodiment supposes that for the time being UE1 does not successfully detect said unique PDCCH.
At this moment; UE1 can't correctly obtain and detect relative downlink service data; Thereby can not go up any information of feedback, cause base station B1 on said HARQ feedback channel, can not detect any signal at the uplink HARQ feedback channel corresponding (PUCCH) with said downlink service data; Perhaps UE1 can't send relative uplink business data, causes base station B1 on relevant reverse link traffic channel, can not detect any signal.Next, base station B1 adopts the transmission method of the PDCCH shown in Fig. 2 or 3.
Particularly, as shown in Figure 2, in the 2nd TTI scope; The PDCCH relevant with the UE1 business datum has been sent out two; And the payload of two PDCCH that send is identical, and wherein, the indication information of the user apparatus service data TTI of the payload of two PDCCH of said transmission comprises 1 bit; And all be set to " 0 ", represent that current TTI comprises the business datum relevant with UE1; When UE1 at least successfully received and resolve one of them said PDCCH, UE1 can correctly obtain and detect relative downlink service data, perhaps sends relative uplink business data.Particularly; Shown in accompanying drawing 3, the PDCCH relevant with the UE1 business datum has been sent out one respectively in the 2nd and the 3rd TTI scope, and the promptly said PDCCH relevant with the UE1 business datum has been sent out two in two continuous TTI scopes; And the payload of two PDCCH of said transmission other field except that the indication information of user apparatus service data TTI is identical; Wherein, the indication information of user apparatus service data TTI comprises 1 bit, and the indication information of the user apparatus service data TTI of the PDCCH payload in the 2nd TTI scope; Be set to " 1 "; Represent that next TTI comprises the business datum relevant with UE1, and current TTI does not comprise the business datum relevant with UE1, the indication information of the user apparatus service data TTI of the PDCCH payload in the 3rd TTI scope; Be set to " 0 ", the expression current TTI comprises the business datum relevant with UE1; When UE1 at least successfully received and resolve one of them said PDCCH, UE1 can correctly obtain and detect relative downlink service data or send relative uplink business data.
In addition, the said PDCCH relevant with the business datum of UE1 is not limited to send at the most twice, and the indication information of the user apparatus service data TTI of its payload also is not limited to 1 bit length.For example shown in accompanying drawing 4; The PDCCH relevant with the UE1 business datum has been sent out one respectively in the the 1st, the 2nd and the 3rd TTI; Be that the said PDCCH relevant with the UE1 business datum has been sent out three in three continuous TTI scopes; And payload other field except the indication information of user apparatus service data TTI of three PDCCH that send is identical; Wherein, The indication information of user apparatus service data TTI comprises 2 bits, and the indication information of the user apparatus service data TTI of the PDCCH payload in the 1st TTI scope is set to " 10 ", and expression subsequently the 2nd i.e. the 3rd TTI comprises the business datum relevant with UE1; Current TTI does not comprise the business datum relevant with UE1; The indication information of the user apparatus service data TTI of the PDCCH payload in the 2nd TTI scope is set to " 01 ", representes that subsequently the 1st is that the 3rd TTI comprises the business datum relevant with UE1, and current TTI does not comprise the business datum relevant with UE1; The indication information of the user apparatus service data TTI of the PDCCH payload in the 3rd TTI scope is set to " 00 ", and the expression current TTI comprises the business datum relevant with UE1; When UE1 at least successfully received and resolve one of them said PDCCH, UE1 can correctly obtain and detect relative downlink service data or send relative uplink business data.
Attention:, then support two transmission that are positioned at the PDCCH of different TTI relevant at the most with the intended service data 1) if the indication information of the user apparatus service data TTI of said PDCCH payload only comprises 1 bit; If the user apparatus service data TTI indication information of said PDCCH payload comprises 2 bits, then support four transmission that are positioned at the PDCCH of different TTI relevant at the most with the intended service data; By that analogy.2) the PDCCH resource shown in Fig. 2 to 5 is actual is logical resource (CCE), and promptly corresponding physical resource (REG) maybe be also discontinuous.
In sum; The invention provides a kind of realize simple and the more excellent downlink control information transmission method of performance; This method is through sending at least two Downlink Control Information relevant with the intended service data in one or more TTI scopes; Increased subscriber equipment (UE) and successfully received the probability of the Downlink Control Information relevant, thereby improved the covering performance of down control channel further, finally realized the covering balance of different down control channels with said intended service data.
Corresponding to preceding method, the present invention also provides a kind of Downlink Control Information transmission system embodiment, and as shown in Figure 6, this system comprises:
The Downlink Control Information sending module of network side is used for issuing at least two Downlink Control Information relevant with the intended service data to subscriber equipment, wherein carries the indication information of said intended service data TTI;
The control information of subscriber equipment receives parsing module, is used for receiving and resolving said Downlink Control Information;
Further, said Downlink Control Information sends through Physical Downlink Control Channel.
Alternatively, this system also comprises the business datum transceiver module of network side, is used for issuing or receiving said intended service data from subscriber equipment to subscriber equipment according to said Downlink Control Information.
Alternatively, this system also comprises the business datum transceiver module of subscriber equipment, and subscriber equipment sends said intended service data according to said Downlink Control Information from the network side reception or to network side.
Understandably, the control information of above network side Downlink Control Information sending module, subscriber equipment receives the business datum sending module of parsing module, network side, the business datum receiver module of subscriber equipment, the business datum sending module of subscriber equipment and another Downlink Control Information transmission system of business datum receiver module composition the present invention embodiment of said network side.
Alternatively, said indication information is the absolute position or the relative position of Transmission Time Interval.
The Downlink Control Information sending module of said network side issues said Downlink Control Information at the Transmission Time Interval and/or the Transmission Time Interval before that send said intended service data.
The Downlink Control Information sending module of said network side issues said Downlink Control Information when judging arbitrary condition below satisfying:
The broad-band channel quality indication (CQI) of said subscriber equipment feedback is less than broad-band channel quality indication thresholding; Or,
On the corresponding uplink HARQ feedback channel of downlink service data, can not detect any signal; Or,
On reverse link traffic channel, can not detect any signal.
Said indication information adopts a bit to represent, wherein the next Transmission Time Interval of " 1 " expression issues said intended service data, and " 0 " expression current transmission time interval issues said intended service data; Or,
Said indication information adopts two bits to represent; Wherein second transmission time after " 10 " expression issues said intended service data; The next Transmission Time Interval of " 01 " expression issues said intended service data, and " 00 " expression current transmission time interval issues said intended service data.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each module in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (12)
1. a downlink control information transmission method is characterized in that, this method comprises:
Network side issues at least two Downlink Control Information relevant with the intended service data to subscriber equipment, wherein carries the said intended service data transmission period indication information of (TTI) at interval;
Said subscriber equipment receives and resolves said Downlink Control Information.
2. the method for claim 1; It is characterized in that; Said network side is after subscriber equipment issues said Downlink Control Information, and this method also comprises: said network side issues or receives said intended service data from subscriber equipment to subscriber equipment according to said Downlink Control Information.
3. the method for claim 1; It is characterized in that; Said subscriber equipment also comprises after successfully receiving and resolve at least one said Downlink Control Information: according to said Downlink Control Information, send said intended service data from the network side reception or to network side.
4. the method for claim 1 is characterized in that: said Downlink Control Information sends through Physical Downlink Control Channel (PDCCH).
5. the method for claim 1, it is characterized in that: said indication information is the absolute position or the relative position of Transmission Time Interval.
6. the method for claim 1 is characterized in that: said network side issues said Downlink Control Information at the Transmission Time Interval and/or the Transmission Time Interval before that send said intended service data.
7. like each described method in the claim 1 to 6, it is characterized in that:
Said indication information adopts a bit to represent, wherein the next Transmission Time Interval of " 1 " expression issues said intended service data, and " 0 " expression current transmission time interval issues said intended service data; Or,
Said indication information adopts two bits to represent; Wherein second transmission time after " 10 " expression issues said intended service data; The next Transmission Time Interval of " 01 " expression issues said intended service data, and " 00 " expression current transmission time interval issues said intended service data.
8. like each described method in the claim 1 to 6, it is characterized in that said network side issues said Downlink Control Information when judging arbitrary condition below satisfying:
The broad-band channel quality indication (CQI) of said subscriber equipment feedback is less than broad-band channel quality indication thresholding; Or,
On the corresponding uplink HARQ feedback channel of downlink service data, can not detect any signal; Or,
On reverse link traffic channel, can not detect any signal.
9. a Downlink Control Information transmission system is characterized in that, this system comprises:
The Downlink Control Information sending module of network side is used for issuing at least two Downlink Control Information relevant with the intended service data to subscriber equipment, wherein carries the said intended service data transmission period indication information of (TTI) at interval;
The control information of subscriber equipment receives parsing module, is used for receiving and resolving said Downlink Control Information.
10. system as claimed in claim 9; It is characterized in that: said indication information is the absolute position or the relative position of Transmission Time Interval; The Downlink Control Information sending module of said network side issues said Downlink Control Information at the Transmission Time Interval and/or the Transmission Time Interval before that send said intended service data.
11., it is characterized in that like each described system in the claim 9 to 10:
Said indication information adopts a bit to represent, wherein the next Transmission Time Interval of " 1 " expression issues said intended service data, and " 0 " expression current transmission time interval issues said intended service data; Or,
Said indication information adopts two bits to represent; Wherein second transmission time after " 10 " expression issues said intended service data; The next Transmission Time Interval of " 01 " expression issues said intended service data, and " 00 " expression current transmission time interval issues said intended service data.
12. like each described system in the claim 9 to 10, it is characterized in that: the Downlink Control Information sending module of said network side issues said Downlink Control Information when judging arbitrary condition below satisfying:
The broad-band channel quality indication (CQI) of said subscriber equipment feedback is less than broad-band channel quality indication thresholding; Or,
On the corresponding uplink HARQ feedback channel of downlink service data, can not detect any signal; Or, on reverse link traffic channel, can not detect any signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110363234.9A CN102447538B (en) | 2011-11-16 | 2011-11-16 | Downlink control information transmission method and system |
| PCT/CN2012/077550 WO2013071754A1 (en) | 2011-11-16 | 2012-06-26 | Method and system for transmitting downlink control information |
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| CN102447538B (en) | 2017-08-01 |
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