CN102413576A - Physical downlink control channel (PDCCH) transmitting and receiving methods and equipment - Google Patents
Physical downlink control channel (PDCCH) transmitting and receiving methods and equipment Download PDFInfo
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- CN102413576A CN102413576A CN2011104325494A CN201110432549A CN102413576A CN 102413576 A CN102413576 A CN 102413576A CN 2011104325494 A CN2011104325494 A CN 2011104325494A CN 201110432549 A CN201110432549 A CN 201110432549A CN 102413576 A CN102413576 A CN 102413576A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The invention discloses PDCCH (physical downlink control channel) transmitting and receiving methods and equipment. The PDCCH transmitting method comprises the following steps that: network equipment determines the PDCCH in a corresponding transmission mode according to the type information of a terminal to be scheduled, wherein the format of the DCI (downlink control information) of the PDCCH in the corresponding transmission mode corresponds to the functional characteristics and characteristic demands supported by the type of the terminal; and the network equipment transmits the PDCCH in the corresponding transmission mode to the terminal. The terminal is an MTC (machine type communications) terminal. By using the invention, a new PDCCH format can be designed for the MTC terminal, thereby reducing PDCCH blind detection frequency, and effectively reducing the complexity of MTC equipment so as to reduce the cost of the MTC equipment.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of PDCCH sending, receiving method and equipment.
Background technology
3-G (Generation Three mobile communication system) with and long evolving system in need to support MTC (communication of machine type, Machine Type Communications) function.A MTC equipment (MTC terminal) possibly have the part characteristic among the multiple M2M communication characteristic, and is little, insensitive to communication delay like Hypomobility, data amount transmitted, require characteristics such as extremely low power dissipation.(the Machine to Machine of M2M after considering; Machine and machine) magnanimity MTC equipment in communicating by letter, need therefore to consider that the cost to MTC equipment further reduces, the direction that possibly optimize is: single antenna is only supported at the terminal; System bandwidth reduces; Do not support high order modulation, do not support carrier aggregation, do not support function and characteristics such as semi-continuous scheduling.
But present LTE (Long Term Evolution; Long Term Evolution) (the Physical Downlink Control Channel of the descending scheduling control channel PDCCH in the system; Physical Downlink Control Channel) form can not well be supported for these optimizations, needs design again.
Summary of the invention
The embodiment of the invention provides a kind of PDCCH sending, receiving method and equipment, and the PDCCH that confirms the respective transmissions pattern in order to the functional characteristics and the characteristic demand that realize supporting according to terminal type also transmits.
The PDCCH sending method that the embodiment of the invention provides comprises:
The network equipment is confirmed the physical downlink control channel PDCCH of corresponding transmission mode according to the type information of treating dispatch terminal, and the DCI form of the PDCCH of said corresponding transmission mode is corresponding with functional characteristics and characteristic demand that the terminal type at said terminal is supported;
The said network equipment sends the PDCCH of said corresponding transmission mode to said terminal.
The PDCCH method of reseptance based on the said method realization that the embodiment of the invention provides comprises:
The terminal receives the PDCCH that the network equipment sends; Said PDCCH is that the network equipment is according to the type information of treating dispatch terminal; Determine and send behind the PDCCH of corresponding transmission mode, the DCI form of the PDCCH of said corresponding transmission mode is corresponding with functional characteristics and characteristic demand that the terminal type at said terminal is supported.
The network equipment that the embodiment of the invention provides comprises:
Determination module is used for confirming the PDCCH of corresponding transmission mode according to the type information of treating dispatch terminal that the DCI form of the PDCCH of said corresponding transmission mode is corresponding with functional characteristics and characteristic demand that the terminal type at said terminal is supported;
Sending module is used for sending to said terminal the PDCCH of said corresponding transmission mode.
The terminal equipment that the embodiment of the invention provides comprises:
Receiver module; Be used to receive the PDCCH that the network equipment sends; Said PDCCH is that the network equipment is according to the type information of treating dispatch terminal; Determine and send behind the PDCCH of corresponding transmission mode, the DCI form of the PDCCH of said corresponding transmission mode is corresponding with functional characteristics and characteristic demand that the terminal type at said terminal is supported;
Parsing module is used to resolve the PDCCH that said receiver module receives, and obtains the up-downgoing schedule information.
In the above embodiment of the present invention; According to the type information of treating dispatch terminal; Confirm the physical downlink control channel PDCCH and the transmission of corresponding transmission mode, the DCI form of the PDCCH of this correspondence transmission mode is corresponding with functional characteristics and characteristic demand that the terminal type at said terminal is supported.The embodiment of the invention is applied to the MTC terminal, and the functional characteristics and the characteristic demand that are different from H2H (Human to Human, person to person) terminal that can be supported according to the MTC terminal adopt suitable PDCCH transmission mode.
Description of drawings
The PDCCH transmission flow sketch map that Fig. 1 provides for the embodiment of the invention;
The structural representation of the network equipment that Fig. 2 provides for the embodiment of the invention;
The structural representation of the terminal equipment that Fig. 3 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention combines characteristics such as the low time delay of M2M communication, small data quantity; A kind of method and relevant device that sends and receive PDCCH proposed; Design new PDCCH DCI (Downlink Control Information, Downlink Control Information) form to PDCCH, can support the characteristic demand and the functional characteristics at MTC terminal; And guarantee that PDCCH DCI form length is identical under the various transmission modes; Greatly reduce the blind check number of times of PDCCH, effectively reduce the complexity at MTC terminal, thereby reduced the cost at MTC terminal.
Below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
Referring to Fig. 1, be the PDCCH transmission flow sketch map that the embodiment of the invention provides, this flow process can comprise:
In end side, corresponding terminal receives and resolves this PDCCH so that carry out the up-downgoing transfer of data according to the scheduling of base station, and the DCI form of this PDCCH is corresponding with functional characteristics and characteristic demand that the terminal type at this terminal is supported.
The terminal here comprises MTC terminal or M2M terminal, and the type terminal has characteristics such as the low time delay of communication, small data quantity.Functional characteristics that the type terminal is supported and characteristic demand can comprise one of following or combination in any:
(1) terminal hardware or software are not supported TTI bundling (Transmission Time Interval) function and SPS (semi-continuous scheduling) function;
(2) terminal hardware or software are not supported many antennas, only support single antenna;
(3) terminal hardware or software are not supported the many antenna port transmission of ascending multi-code word;
(4) terminal hardware or software are not supported MIMO (multiple-input and multiple-output); Concrete, do not support MIMO to be meant one of following situation or combination in any: to support the limited quantity port transmission, do not support the multilayer transmission, do not support the transmission of dicode word;
(5) terminal hardware or software are not supported high order modulation;
(6) terminal hardware or software are not supported carrier aggregation;
(7) terminal hardware or software are not supported big bandwidth, only support little bandwidth;
(8) HARQ (Hybrid Automatic Repeat Request mixes automatic repeat requests) the process number of terminal hardware or software support reduces.
So-called terminal hardware is not supported certain function, and the corresponding hardware that typically refers in the terminal does not have this function, and for example, terminal antenna is a single antenna, therefore can't support many antenna functions.So-called terminal software is not supported to typically refer under the situation of certain function of hardware supports; Because of not loading the software module of supporting corresponding function; Even perhaps loaded the software module of supporting corresponding function but do not activate or open the function that this software module realizes, cause this terminal can't to support the situation of this function.
In the face of in the above-mentioned process step 101, the base station confirms that according to the type information at terminal the process of the PDCCH of corresponding transmission mode is described in detail down.
Transmission mode is the set of a series of transmission characteristics; Can comprise DCI form, PDCCH search volume, PDCCH scrambling RNTI (Radio Network Temporary Identifier; Radio Network Temporary Identifier) etc., the transmission mode of the PDCCH that explanation embodiment of the invention are designed according to MTC terminal or M2M terminal from these aspects respectively below.
(1) aspect DCI length
The PDCCH that the embodiment of the invention designed has identical DCI length, and this length can be length maximum in all DCI length, and the DCI of this maximum length of curtailment is filled to this maximum length with it.This identical DCI length also can be a certain than the bigger length of maximum length in all DCI length, and the remaining bits among the DCI of this length can be reserved expansion.
(2) aspect PDCCH scrambling RNTI
If the DCI length that the embodiment of the invention is supported to the DCI length of MTC Terminal Design and H2H terminal is identical, then need use the RNTI that is different from the H2H terminal to come the scrambling differentiation.For example, C-RNTI (Cell RNTI, sub-district RNTI) scrambling PDCCH is used at the H2H terminal, and MTC-C-RNTI scrambling PDCCH is used at the MTC terminal.Distinguish in this way, can guarantee that the blind check at H2H terminal is unaffected, and then avoid making a mistake, guarantee that the normal data at H2H terminal receives.
(3) aspect the PDCCH search volume
The PDCCH that the embodiment of the invention designed can only be used for the exclusive search volume scheduling at terminal; The PDCCH of public space uses the DCI form identical with original H2H terminal; For example also use existing 1A and 1C; Length, format and content are all constant, can not influence the reception of H2H terminal public information and random access information like this.
The PDCCH that the embodiment of the invention designed also can both be used for the exclusive space scheduling in terminal, also was used for the public space scheduling.Might cause the resource of the PDCCH at original H2H terminal to be seized like this, but for the MTC terminal, the PDCCH blind check number of times of public space reduce by half by the MTC terminal.
(3) aspect the DCI form
Various functional characteristics and characteristic demand that the embodiment of the invention is supported according to above MTC terminal or M2M terminal, the DCI form that is designed comprises following situation:
(a) do not support under the situation of TTI bundling function and SPS function at the terminal, do not support the DCI form under the SPS C-RNTI configuration.
(b) do not support many antennas at the terminal, only support under the situation of single antenna that DCI form quantity reduces (promptly on the basis of existing DCI form, reducing the DCI form).
For example; For the terminal of Release 10, support TM1 to TM9 totally 9 kinds of transmission modes at present, when terminal limitations for only supporting single antenna; Then the downlink transfer pattern supported of terminal can comprise one of following or combination: TM1 (TM:Transmission mode; Transmission mode), TM2, TM6, TM7, TM8, TM9, corresponding D CI form is reduced to maximum 5 kinds from 8 kinds of forms so, i.e. DCI1A, DCI 1, DCI 1B, DCI 2B or DCI 2C.
Do not support under the situation of the many antenna port transmission of ascending multi-code word at the terminal that (c) DCI form quantity reduces (promptly on the basis of existing DCI form, reducing the DCI form).
For example,, support 4 two kinds of DCI forms of DCI0 and DCI at present,, then do not support DCI 4, only support DCI0 if uplink multi-antenna port transmission is not supported at the terminal for the terminal of Release 10.
(d) do not support under the situation of MIMO at the terminal; In the DCI form, reduce the transmission of dicode word, number of plies indication, port indication, precoding information bit number, the information field of second codeword transmission piece, precoding; And the descending power of multiuser MIMO (MU-MIMO) skew bit, for example:
I. reduce the corresponding information field of second codeword transmission piece, specifically can comprise: reduce MCS indication (5 bit), reduce new data indication (1 bit), reduce the corresponding bit number of RV version (2 bit) indication, reduce by 8 bits altogether;
Ii. reduce precoding information, specifically can comprise: reduce 6 bits (4 port) information to DCI2 and DCI4, for example reducing to respectively is 4 bits and 5 bits, perhaps reduces 0 bit (2 port) that is directed against DCI2A or 2 bits (4 port) to 0 bit;
Iii. transmission block also can reduce to 1 bit of code word exchange identification; Be primarily aimed at DCI2 and DCI 2A.
Iv. the information bit of the number of plies and port indication can reduce.For example, to DCI 2C, can be with antenna port, the 3 bits indication of scrambler indication and layer number is reduced to the indication of 2 bits.
V. reduce descending power skew bit 1 bit of multiuser MIMO (MU-MIMO), for example to DCI 1D.
(e) do not support under the situation of high order modulation at the terminal; 5 bit MCS (scheduling coded system) indication in the corresponding DCI form (can the highest support 64QAM; Wherein QAM is the english abbreviation of Quadrature Amplitude Modulation, the expression quadrature amplitude modulation) can be reduced to 4 bits (the highest support 16QAM).If do not support 64QAM and 16QAM, the transport block size index that perhaps need indicate tails off, and so, MCS indication bit number can further reduce.This operation can be directed against all DCI forms.
Do not support under the situation of carrier aggregation at the terminal that (f) the carrier wave indication territory (0-3 bit) in the corresponding DCI form can be reduced, this operation can be directed against all DCI forms.
(g) do not support big bandwidth at the terminal; Only support under the situation of little bandwidth; Information bit can correspondingly reduce in the corresponding DCI form, but the terminal needs to support the pairing DCI length of maximum bandwidth in the bandwidth that this operation can be directed against all DCI forms.
(h) under the situation that the HARQ process number of supporting at the terminal reduces, for example only support 1 process, then the irrelevant information bit is indicated in the DCI form.If 2 processes are only supported at the terminal, be reduced to the indication of 1 bit from original bit number (for the TDD system is 4 bits, is 3 bits for the FDD system) in the DCI form.If more multi-process can be supported in the terminal, for example maximum 4 processes then are reduced to the indication of 2 bits from original bit number (for the TDD system is 4 bits, is 3 bits for the FDD system) in the DCI form.This operation can be to the DCI form of all descending schedulings.
Further, owing to comprise two kinds of DCI forms in every kind of transmission mode, therefore DCI 1A and DCI X need to increase by 1 bit identification (DCI flag) and distinguish two kinds of forms; For example 0 identify DCI 1A, 1 sign DCI X, wherein, DCI X identifies above-mentioned DCI 1; DCI 1B, DCI 2B, DCI 2C.
More specifically, suppose that MTC terminal These characteristics and characteristic demand all support,, can only design DCI 0 again, DCI1, DCI1A, DCI 1B, DCI 2B, DCI 2C so according to top analysis.Carry out information bit according to top principle and reduce, the useful information that specifically comprises like table 24 to shown in the table 31.All DCI form keeps length consistent, and is reference with the DCI length of maximum, and useful information is not enough, then can filling bit to maximum length, untapped bit can be used as reserved bit, as other later expansions.
The length of DCI is relevant with the process number that bandwidth and HARQ support, supposes to support that bandwidth is the wide 5M of being of 1.4M or maximum supported, and HARQ can support maximum 4 processes, and the length of the DCI form that the embodiment of the invention designed is:
Support in maximum under the situation of 1.4M bandwidth: DCI 0 is 24 bits, and DCI 1 is 21 bits, and DCI 1A is 21 bits, and DCI 1B is 23 bits, and DCI 2B is 22 bits, and DCI 2C is 23 bits.Therefore can be with the unified length of 24 bits as all DCI.For some DCI, remaining bits can be used as reserved bit, uses as expansion afterwards.Perhaps, can be with greater than a certain length of 24 bits length as a reference, 26 bits for example, remaining bits is reserved.
Support in maximum under the situation of 5M bandwidth: DCI 0 is 28 bits, and DCI 1 is 28 bits, and DCI 1A is 25 bits, and DCI 1B is 25 bits, and DCI 2B is 29 bits, and DCI 2C is 30 bits.Therefore can be with the unified length of 30 bits as all DCI.For some DCI, remaining bits can be used as reserved bit, uses as expansion afterwards.Perhaps, can be with greater than a certain length of 30 bits length as a reference, 32 bits for example, remaining bits is reserved.
Need to prove that if the DCI length that the DCI length that the embodiment of the invention designed and H2H terminal are supported is identical, then need use different terminal sign RNTI to come scrambling to distinguish, for example C-RNTI is used at the H2H terminal, MTC-C-RNTI is used at the MTC terminal; If do not distinguish, can influence the blind check at H2H terminal, the generation that leads to errors influences the normal reception at H2H terminal.
The main control information transmission of DCI format 0 with take bit number, can be shown in table 24.
Table 24
The main control information transmission of DCI format 1 with take bit number, can be as shown in Tble 25.
Table 25
DCI format1A can be used for:
Application scenarios 1: the indication of the PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) of the single codeword of employing compact mode scheduling;
Application scenarios 2: the scheduling of public information, its CRC is by RA-RNTI (Random Access RNTI inserts RNTI at random); P-RNTI (Paging RNTI; Paging RNTI), perhaps SI-RNTI (System Information RNTI, system information RNTI) scrambling;
Application scenarios 3: be used for the order that PDCCH initiates RACH (Random Access Channel, RACH) process.
Corresponding bit length and the implication of the information field of Format1A when application scenarios 1 can be shown in table 26.
Table 26
Corresponding bit length and the implication of the information field of Format1A when application scenarios 2 can be shown in table 27.
Table 27
Corresponding bit length and the implication of the information field of Format1A when application scenarios 3 can be shown in table 28.
Table 28
The main control information transmission of DCI format 1B with take bit number, can be shown in table 29.
Table 29
The main control information transmission of DCI format 2B with take bit number can be shown in table 30.
Table 30
The main control information transmission of DCI format 2C with take bit number, can be shown in table 31.
Table 31
DCI format3 and 3A form are constant, as long as length keeps being consistent with other DCI forms.
Through comparative analysis, the influence of the embodiment of the invention to the PDCCH blind check is described below.Two kinds of situation of concrete branch are described:
Situation 1: the PDCCH that the embodiment of the invention designed not only is applied to the exclusive space scheduling of UE, also is applied to the public space scheduling.At this moment, all DCI form length that UE supports are identical, comprise the DCI 1C that carries common control information etc.
Under the situation of system bandwidth 1.4M, suppose that the maximum bandwidth that UE supports is 1.4M, this moment, physical resource was few so, and polymerization grade CCE=8 also can not support.Can define the candidate PDCCH number of CCE polymerization grade and candidate PDCCH number mapping table in the existing LTE system again, removal CCE=8.This moment, UE common search space only needed the length of a kind of DCI form of blind check, and the resource number is 4, and blind check is PDCCH4 time altogether; For the exclusive search volume of UE, the polymerization grade of CCE can be 1,2,4, and PDCCH resource number is that { 6,6,2} only needs the length of a kind of DCI form of blind check, and blind check is 6+6+2=14 time so altogether under the corresponding CCE polymerization grade.Therefore, UE blind check number of times altogether is 4+14=18 time, and when adopting prior art frequently required 44 times, the blind check number of times reduces greatly.
Under the situation of system bandwidth, suppose maximum bandwidth that UE supports greater than 1.4M, for example 5M greater than 1.4M.This moment UE common search space, CCE polymerization grade is 4,8, PDCCH resource number be that { 4,2} only needs the length of a kind of DCI form of blind check, has blind check PDCCH 4+2=6 time altogether under the corresponding polymerization grade.For the exclusive search volume of UE, the polymerization grade of CCE can be 1,2,4, and PDCCH resource number is that { 6,6,2} only needs the length of a kind of DCI form of blind check, and blind check is 6+6+2=14 time so altogether under the corresponding CCE polymerization grade.Therefore, UE blind check number of times altogether is 6+14=20 time.Compare 44 times required when adopting prior art, the blind check number of times reduces greatly.
Situation 2: the PDCCH of embodiment of the invention design only is applied to the exclusive space scheduling of UE, shall not be applied to the public space scheduling.At this moment, identical for the DCI form that carries common control information with existing LTE system, for the form of the new unified length of all DCI uses of carrying the PDCCH under the C-RNTI configuration.
In system bandwidth is under the situation of 1.4M, supposes that the maximum bandwidth that UE supports is 1.4M, and this moment, physical resource was few so, and polymerization grade CCE=8 also can not support.Again the candidate PDCCH number in the definition list 4 is removed CCE=8.The length of 2 kinds of DCI forms of UE common search space requirement blind check this moment, the resource number is 4, blind check is PDCCH2*4=8 time altogether; For the exclusive search volume of UE, the polymerization grade of CCE can be 1,2,4, and PDCCH resource number is that { 6,6,2} only needs the length of a kind of DCI form of blind check, and blind check is 6+6+2=14 time so altogether under the corresponding CCE polymerization grade.Therefore, UE blind check number of times altogether is 8+14=22 time, and when adopting prior art frequently required 44 times, the blind check number of times reduces greatly.
Under the situation of system bandwidth, suppose maximum bandwidth that UE supports greater than 1.4M, for example 5M greater than 1.4M.This moment UE common search space, CCE polymerization grade is 4,8, PDCCH resource number be that { 4,2} needs the length of 2 kinds of DCI forms of blind check, has blind check PDCCH 2* (4+2)=12 altogether under the corresponding polymerization grade; For the exclusive search volume of UE, the polymerization grade of CCE can be 1,2,4, and PDCCH resource number is that { 6,6,2} only needs the length of a kind of DCI form of blind check, and blind check is 6+6+2=14 time so altogether under the corresponding CCE polymerization grade.Therefore, UE blind check number of times altogether is 12+14=26 time, and when adopting prior art frequently required 44 times, the blind check number of times reduces greatly.
In sum, can find out and adopt the DCI form that the embodiment of the invention designed to significantly reduce the number of times of UE blind check PDCCH, thereby reduce the processing complexity at terminal greatly, improve terminal processes speed, thereby reduce the cost at terminal.
Based on identical technical conceive, the embodiment of the invention also provides a kind of network equipment and terminal equipment.
Referring to Fig. 2, the structural representation of the network equipment that provides for the embodiment of the invention, this network equipment can be a base station equipment.As shown in the figure, this network equipment can comprise:
Sending module 202 is used for sending to said terminal the PDCCH of said corresponding transmission mode.
Functional characteristics that said terminal type is supported and characteristic demand comprise one of following or combination in any:
Terminal hardware or software are not supported Transmission Time Interval TTI bundling function and semi-continuous scheduling SPS function;
Terminal hardware or software are not supported many antennas, only support single antenna;
Terminal hardware or software are not supported the many antenna port transmission of ascending multi-code word;
Terminal hardware or software are not supported MIMO; Concrete, do not support MIMO to comprise one of following or combination in any: to support the limited quantity port transmission, do not support the multilayer transmission, do not support the transmission of dicode word;
Terminal hardware or software are not supported high order modulation;
Terminal hardware or software are not supported carrier aggregation;
Terminal hardware or software are not supported big bandwidth, only support little bandwidth;
The HARQ process number that terminal hardware or software are supported reduces.
To functional characteristics and characteristic demand that above-mentioned various terminal type is supported, the DCI form that determination module 201 is determined can comprise following situation:
When said terminal type is not supported TTI bunding function and SPS function, do not support the DCI form under the SPS C-RNTI configuration in the DCI form;
When said terminal type is not supported many antennas, when only supporting single antenna, the quantity of the pairing DCI form of downlink transfer pattern reduces to some extent in the DCI form;
When said terminal type did not support that the many antenna ports of ascending multi-code word transmit, the quantity of the pairing DCI form of uplink transmission mode reduced to some extent in the DCI form;
When said terminal type is not supported MIMO, reduce the information field of the transmission of dicode word, number of plies indication, port indication, precoding information bit number and second codeword transmission piece in the DCI form of being determined.Wherein, the information field of second codeword transmission piece of minimizing comprises: modulation coding mode MCS indication, new data indication, the indication of RV version and transmission block are to the code word exchange identification;
When said terminal type is not supported high order modulation, reduce the bit number of scheduling coded system MCS indication information in the DCI form;
When said terminal type is not supported carrier aggregation, do not comprise carrier wave indication territory in the DCI form;
Do not support big bandwidth when said terminal type, when only supporting little bandwidth, reduce the information bit of resource indication in the DCI form;
When the HARQ process number of said terminal type support reduces, reduce the information bit of HARQ process indication in the DCI form.
Concrete, determination module 201 is determined, and the various functional characteristics of supporting with said terminal type and the PDCCH of the corresponding DCI form of characteristic demand have identical DCI length.Said length is length maximum in various functional characteristics and each self-corresponding DCI length of characteristic demand; Perhaps, said length is a preseting length, and this preseting length is greater than length maximum in various functional characteristics and each self-corresponding DCI length of characteristic demand; For the DCI of the said length of curtailment, it is filled to said length.
Further, determination module 201 also is used for, if the DCI length of said terminal type is identical with the DCI length of other terminal type, then uses the terminal iidentification RNTI be different from said other terminal type that the DCI of said terminal type is carried out scrambling.
Concrete, said PDCCH is used for the exclusive space scheduling in terminal, perhaps is used for the scheduling in the exclusive space of public space and terminal.
Concrete, carry out the DCI form through identification information in the DCI form that determination module 201 is determined and distinguish.
Referring to Fig. 3, the structural representation of the terminal equipment that provides for the embodiment of the invention.This terminal equipment can be MTC terminal or M2M terminal.As shown in the figure, this terminal equipment can comprise:
Receiver module 301; Be used to receive the PDCCH that the network equipment sends; Said PDCCH is that the network equipment is according to the type information of treating dispatch terminal; Determine and send behind the PDCCH of corresponding transmission mode, the DCI form of the PDCCH of said corresponding transmission mode is corresponding with functional characteristics and characteristic demand that the terminal type at said terminal is supported;
Parsing module 302 is used to resolve the PDCCH that said receiver module receives, and obtains the up-downgoing schedule information.
Functional characteristics that said terminal equipment is supported and characteristic demand comprise one of following or combination in any:
Terminal hardware or software are not supported Transmission Time Interval TTI bundling function and semi-continuous scheduling SPS function;
Terminal hardware or software are not supported many antennas, only support single antenna;
Terminal hardware or software are not supported the many antenna port transmission of ascending multi-code word;
Terminal hardware or software are not supported MIMO; Concrete, the said MIMO that do not support comprises one of following or combination in any: support the limited quantity port transmission, do not support the multilayer transmission, do not support the transmission of dicode word;
Terminal hardware or software are not supported high order modulation;
Terminal hardware or software are not supported carrier aggregation;
Terminal hardware or software are not supported big bandwidth, only support little bandwidth;
The HARQ process number that terminal hardware or software are supported reduces.
Concrete, to functional characteristics and the characteristic demand that above-mentioned various terminal type is supported, the DCI form of the PDCCH that receiver module 301 is received comprises following situation:
When said terminal type is not supported TTI bunding function and SPS function, do not support the DCI form under the SPS C-RNTI configuration in the DCI form;
When said terminal type is not supported many antennas, when only supporting single antenna, the quantity of the pairing DCI form of downlink transfer pattern reduces to some extent in the DCI form;
When said terminal type did not support that the many antenna ports of ascending multi-code word transmit, the quantity of the pairing DCI form of uplink transmission mode reduced to some extent in the DCI form;
When said terminal type is not supported MIMO, reduce the information field of the transmission of dicode word, number of plies indication, port indication, precoding information bit number and second codeword transmission piece in the DCI form.Concrete, the information field of second codeword transmission piece of minimizing comprises: modulation coding mode MCS indication, new data indication, the indication of RV version and transmission block are to the code word exchange identification;
When said terminal type is not supported high order modulation, reduce the bit number of scheduling coded system MCS indication information in the DCI form;
When said terminal type is not supported carrier aggregation, do not comprise carrier wave indication territory in the DCI form.
Do not support big bandwidth when said terminal type, when only supporting little bandwidth, reduce the information bit of resource indication in the DCI form;
When the HARQ process number of said terminal type support reduces, reduce the information bit of HARQ process indication in the DCI form.
Concrete, the various functional characteristics of supporting with said terminal type and the PDCCH of the corresponding DCI form of characteristic demand have identical DCI length.Concrete, said length is length maximum in various functional characteristics and each self-corresponding DCI length of characteristic demand; Perhaps, said length is a preseting length, and this preseting length is greater than length maximum in various functional characteristics and each self-corresponding DCI length of characteristic demand;
For the DCI of the said length of curtailment, it is filled to said length.
Further, among the PDCCH that receiver module 301 receives, use the terminal iidentification RNTI be different from other terminal type that the DCI of said terminal type is carried out scrambling.
Concrete, receiver module 301 is exclusive space at the terminal, perhaps at public space and the said PDCCH of terminal exclusive space blind check.
Concrete, carry out the DCI form through identification information in the DCI form that said PDCCH supported and distinguish.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product is stored in the storage medium, comprise some instructions with so that a station terminal equipment (can be mobile phone, personal computer; Server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be looked protection scope of the present invention.
Claims (56)
1.
A kind of PDCCH sending method is characterized in that, comprising:
The network equipment is according to the type information of treating dispatch terminal; Confirm the physical downlink control channel PDCCH of corresponding transmission mode, the Downlink Control Information DCI form of the PDCCH of said corresponding transmission mode is corresponding with functional characteristics and characteristic demand that the terminal type at said terminal is supported;
said network equipment sends the PDCCH of said corresponding transmission mode to said terminal.
2.
The method of claim 1 is characterized in that, functional characteristics that said terminal type is supported and characteristic demand comprise one of following or combination in any:
Terminal hardware or software are not supported Transmission Time Interval TTI bundling function and semi-continuous scheduling SPS function;
Terminal hardware or software are not supported many antennas, only support single antenna;
Terminal hardware or software are not supported the many antenna port transmission of ascending multi-code word;
Terminal hardware or software are not supported multiple-input and multiple-output MIMO;
Terminal hardware or software are not supported high order modulation;
Terminal hardware or software are not supported carrier aggregation;
Terminal hardware or software are not supported big bandwidth, only support little bandwidth;
The HARQ process number that
terminal hardware or software are supported reduces.
3.
Method as claimed in claim 2 is characterized in that, said terminal hardware or software are not supported MIMO, comprises one of following or combination in any:
Terminal hardware or software are supported the limited quantity port transmission;
Terminal hardware or software are not supported the multilayer transmission;
terminal hardware or software are not supported the transmission of dicode word.
4.
method as claimed in claim 2; It is characterized in that; When said terminal type is not supported TTI bunding function and SPS function, do not support the DCI form under the SPS Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI configuration in the DCI form that said PDCCH supported.
5.
method as claimed in claim 2; It is characterized in that, when said terminal type is not supported many antennas, when only supporting single antenna; In the DCI form that said PDCCH supported, the quantity of the pairing DCI form of downlink transfer pattern reduces to some extent.
6.
method as claimed in claim 2; It is characterized in that; When said terminal type did not support that the many antenna ports of ascending multi-code word transmit, in the DCI form that said PDCCH supported, the quantity of the pairing DCI form of uplink transmission mode reduced to some extent.
7.
method as claimed in claim 2; It is characterized in that; When said terminal type is not supported MIMO; In the DCI form that said PDCCH supported, reduce the information field of the transmission of dicode word, number of plies indication, port indication, precoding information bit number and second codeword transmission piece.
8.
method as claimed in claim 7 is characterized in that the information field of second codeword transmission piece of minimizing comprises: modulation coding mode MCS indication, new data indication, the indication of RV version and transmission block are to the code word exchange identification.
9.
method as claimed in claim 2 is characterized in that, when said terminal type is not supported high order modulation, reduces the bit number of scheduling coded system MCS indication information in the DCI form that said PDCCH supported.
10.
method as claimed in claim 2 is characterized in that, when said terminal type is not supported carrier aggregation, does not comprise carrier wave indication territory in the DCI form that said PDCCH supported.
11.
method as claimed in claim 2 is characterized in that, does not support big bandwidth when said terminal type, when only supporting little bandwidth, reduces the information bit of resource indication in the DCI form that said PDCCH supported.
12.
method as claimed in claim 2 is characterized in that, when the HARQ process number of said terminal type support reduces, reduces the information bit of HARQ process indication in the DCI form that said PDCCH supported.
13.
the method for claim 1 is characterized in that, the various functional characteristics of supporting with said terminal type and the PDCCH of the corresponding DCI form of characteristic demand have identical DCI length.
14.
Method as claimed in claim 13 is characterized in that, said length is length maximum in various functional characteristics and each self-corresponding DCI length of characteristic demand; Perhaps, said length is a preseting length, and this preseting length is greater than length maximum in various functional characteristics and each self-corresponding DCI length of characteristic demand;
for the DCI of the said length of curtailment, are filled to said length with it.
< 15. b >method as claimed in claim 13; It is characterized in that; If the DCI length of said terminal type is identical with the DCI length of other terminal type, then use the terminal iidentification RNTI be different from said other terminal type that the DCI of said terminal type is carried out scrambling.</b>
16.
the method for claim 1 is characterized in that said PDCCH is used for the exclusive space scheduling in terminal, perhaps is used for the scheduling in the exclusive space of public space and terminal.
17.
the method for claim 1 is characterized in that, carries out the DCI form through identification information in the DCI form that said PDCCH supported and distinguishes.
18.
, is characterized in that said terminal comprises like the described method of one of claim 1-17: MTC terminal or M2M terminal.
19.
A kind ofly it is characterized in that, comprising based on the PDCCH method of reseptance of realizing like the described method of one of claim 1-17:
terminal receives the PDCCH that the network equipment sends; Said PDCCH is that the network equipment is according to the type information of treating dispatch terminal; Determine and send behind the PDCCH of corresponding transmission mode, the DCI form of the PDCCH of said corresponding transmission mode is corresponding with functional characteristics and characteristic demand that the terminal type at said terminal is supported.
20.
method as claimed in claim 19 is characterized in that said terminal comprises: MTC terminal or M2M terminal.
21.
A kind of network equipment is characterized in that, comprising:
Determination module is used for confirming the PDCCH of corresponding transmission mode according to the type information of treating dispatch terminal that the DCI form of the PDCCH of said corresponding transmission mode is corresponding with functional characteristics and characteristic demand that the terminal type at said terminal is supported;
sending module is used for sending to said terminal the PDCCH of said corresponding transmission mode.
22.
The network equipment as claimed in claim 21 is characterized in that, functional characteristics that said terminal type is supported and characteristic demand comprise one of following or combination in any:
Terminal hardware or software are not supported Transmission Time Interval TTI bundling function and semi-continuous scheduling SPS function;
Terminal hardware or software are not supported many antennas, only support single antenna;
Terminal hardware or software are not supported the many antenna port transmission of ascending multi-code word;
Terminal hardware or software are not supported multiple-input and multiple-output MIMO;
Terminal hardware or software are not supported high order modulation;
Terminal hardware or software are not supported carrier aggregation;
Terminal hardware or software are not supported big bandwidth, only support little bandwidth;
The HARQ process number that
terminal hardware or software are supported reduces.
23.
The network equipment as claimed in claim 22 is characterized in that, said terminal hardware or software are not supported MIMO, comprises one of following or combination in any:
Terminal hardware or software are supported the limited quantity port transmission;
Terminal hardware or software are not supported the multilayer transmission;
terminal hardware or software are not supported the transmission of dicode word.
< 24. b >network equipment as claimed in claim 22; It is characterized in that; Said determination module specifically is used for, and when said terminal type is not supported TTI bunding function and SPS function, does not support the DCI form under the SPS C-RNTI configuration in the DCI form of being determined.</b>
< 25. b >network equipment as claimed in claim 22; It is characterized in that; Said determination module specifically is used for, when said terminal type is not supported many antennas, when only supporting single antenna; In the DCI form of being determined, the quantity of the pairing DCI form of downlink transfer pattern reduces to some extent.</b>
< 26. b >network equipment as claimed in claim 22; It is characterized in that; Said determination module specifically is used for; When said terminal type did not support that the many antenna ports of ascending multi-code word transmit, in the DCI form of being determined, the quantity of the pairing DCI form of uplink transmission mode reduced to some extent.</b>
< 27. b >network equipment as claimed in claim 22; It is characterized in that; Said determination module specifically is used for; When said terminal type is not supported MIMO, in the DCI form of being determined, reduce the information field of the transmission of dicode word, number of plies indication, port indication, precoding information bit number and second codeword transmission piece.</b>
< 28. b >network equipment as claimed in claim 27; It is characterized in that; Said determination module specifically is used for; The information field of second the codeword transmission piece that reduces comprises: modulation coding mode MCS indication, new data indication, the indication of RV version and transmission block are to the code word exchange identification.</b>
< 29. b >network equipment as claimed in claim 22; It is characterized in that; Said determination module specifically is used for, and when said terminal type is not supported high order modulation, reduces the bit number of scheduling coded system MCS indication information in the DCI form of being determined.</b>
30.
network equipment as claimed in claim 22 is characterized in that said determination module specifically is used for, and when said terminal type is not supported carrier aggregation, does not comprise carrier wave indication territory in the DCI form of being determined.
< 31. b >network equipment as claimed in claim 22; It is characterized in that said determination module specifically is used for, when said terminal type is not supported big bandwidth; When only supporting little bandwidth, reduce the information bit of resource indication in the DCI form of being determined.</b>
< 32. b >network equipment as claimed in claim 22; It is characterized in that; Said determination module specifically is used for, and when the HARQ process number of said terminal type support reduces, reduces the information bit of HARQ process indication in the DCI form of being determined.</b>
< 33. b >network equipment as claimed in claim 21; It is characterized in that; Said determination module is determined, and the various functional characteristics of supporting with said terminal type and the PDCCH of the corresponding DCI form of characteristic demand have identical DCI length.</b>
34.
network equipment as claimed in claim 33 is characterized in that, the said length that said determination module is determined is length maximum in various functional characteristics and each self-corresponding DCI length of characteristic demand; Perhaps, the said length that said determination module is determined is a preseting length, and this preseting length is greater than length maximum in various functional characteristics and each self-corresponding DCI length of characteristic demand; For the DCI of the said length of curtailment, it is filled to said length.
< 35. b >network equipment as claimed in claim 33; It is characterized in that; Said determination module also is used for; If the DCI length of said terminal type is identical with the DCI length of other terminal type, then use the terminal iidentification RNTI be different from said other terminal type that the DCI of said terminal type is carried out scrambling.</b>
36.
network equipment as claimed in claim 21 is characterized in that said PDCCH is used for the exclusive space scheduling in terminal, perhaps is used for the scheduling in the exclusive space of public space and terminal.
37.
network equipment as claimed in claim 21 is characterized in that, carries out the DCI form through identification information in the DCI form that said determination module is determined and distinguishes.
38.
, is characterized in that said terminal comprises like the described network equipment of one of claim 21-37: MTC terminal or M2M terminal.
39.
A kind of terminal equipment is characterized in that, comprising:
Receiver module; Be used to receive the PDCCH that the network equipment sends; Said PDCCH is that the network equipment is according to the type information of treating dispatch terminal; Determine and send behind the PDCCH of corresponding transmission mode, the DCI form of the PDCCH of said corresponding transmission mode is corresponding with functional characteristics and characteristic demand that the terminal type at said terminal is supported;
parsing module is used to resolve the PDCCH that said receiver module receives, and obtains the up-downgoing schedule information.
40.
Terminal equipment as claimed in claim 39 is characterized in that, functional characteristics that said terminal equipment is supported and characteristic demand comprise one of following or combination in any:
Terminal hardware or software are not supported Transmission Time Interval TTI bundling function and semi-continuous scheduling SPS function;
Terminal hardware or software are not supported many antennas, only support single antenna;
Terminal hardware or software are not supported the many antenna port transmission of ascending multi-code word;
Terminal hardware or software are not supported multiple-input and multiple-output MIMO;
Terminal hardware or software are not supported high order modulation;
Terminal hardware or software are not supported carrier aggregation;
Terminal hardware or software are not supported big bandwidth, only support little bandwidth;
The HARQ process number that
terminal hardware or software are supported reduces.
41.
Terminal equipment as claimed in claim 40 is characterized in that, said terminal hardware or software are not supported MIMO, comprises one of following or combination in any:
Terminal hardware or software are supported the limited quantity port transmission;
Terminal hardware or software are not supported the multilayer transmission;
terminal hardware or software are not supported the transmission of dicode word.
< 42. b >terminal equipment as claimed in claim 40; It is characterized in that; When said terminal type is not supported TTI bunding function and SPS function, do not support the DCI form under the SPS C-RNTI configuration in the DCI form of the PDCCH that said receiver module receives.</b>
< 43. b >terminal equipment as claimed in claim 40; It is characterized in that; When said terminal type is not supported many antennas; When only supporting single antenna, in the DCI form of the PDCCH that said receiver module receives, the quantity of the pairing DCI form of downlink transfer pattern reduces to some extent.</b>
< 44. b >terminal equipment as claimed in claim 40; It is characterized in that; When said terminal type does not support that the many antenna ports of ascending multi-code word transmit; In the DCI form of the PDCCH that said receiver module receives, the quantity of the pairing DCI form of uplink transmission mode reduces to some extent.</b>
< 45. b >terminal equipment as claimed in claim 40; It is characterized in that; When said terminal type is not supported MIMO; In the DCI form of the PDCCH that said receiver module receives, reduce the information field of the transmission of dicode word, number of plies indication, port indication, precoding information bit number and second codeword transmission piece.</b>
< 46. b >terminal equipment as claimed in claim 45; It is characterized in that; The information field of second the codeword transmission piece that reduces comprises: modulation coding mode MCS indication, new data indication, the indication of RV version and transmission block are to the code word exchange identification.</b>
< 47. b >terminal equipment as claimed in claim 40; It is characterized in that; When said terminal type is not supported high order modulation, in the DCI form of the PDCCH that said receiver module receives, reduce the bit number of scheduling coded system MCS indication information.</b>
48.
terminal equipment as claimed in claim 40 is characterized in that, when said terminal type is not supported carrier aggregation, does not comprise carrier wave indication territory in the DCI form of the PDCCH that said receiver module receives.
< 49. b >terminal equipment as claimed in claim 40; It is characterized in that, do not support big bandwidth, when only supporting little bandwidth when said terminal type; In the DCI form of the PDCCH that said receiver module receives, reduce the information bit of resource indication.</b>
< 50. b >terminal equipment as claimed in claim 40; It is characterized in that; When the HARQ process number of said terminal type support reduces, in the DCI form of the PDCCH that said receiver module receives, reduce the information bit of HARQ process indication.</b>
51.
terminal equipment as claimed in claim 39 is characterized in that, the various functional characteristics of supporting with said terminal type and the PDCCH of the corresponding DCI form of characteristic demand have identical DCI length.
52.
Terminal equipment as claimed in claim 51 is characterized in that, said length is length maximum in various functional characteristics and each self-corresponding DCI length of characteristic demand; Perhaps, said length is a preseting length, and this preseting length is greater than length maximum in various functional characteristics and each self-corresponding DCI length of characteristic demand;
for the DCI of the said length of curtailment, are filled to said length with it.
53.
terminal equipment as claimed in claim 51 is characterized in that, among the PDCCH that said receiver module receives, uses the terminal iidentification RNTI be different from other terminal type that the DCI of said terminal type is carried out scrambling.
54.
terminal equipment as claimed in claim 39 is characterized in that said receiver module specifically is used for, the exclusive space at the terminal is perhaps at public space and the said PDCCH of terminal exclusive space blind check.
55.
terminal equipment as claimed in claim 39 is characterized in that, carries out the DCI form through identification information in the DCI form that said PDCCH supported and distinguishes.
56.
, is characterized in that said terminal comprises like the described terminal equipment of one of claim 39-55: MTC terminal or M2M terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110432549.4A CN102413576B (en) | 2011-12-21 | 2011-12-21 | Physical downlink control channel (PDCCH) transmitting and receiving methods and equipment |
| PCT/CN2012/081131 WO2013091406A1 (en) | 2011-12-21 | 2012-09-07 | Pdcch sending and receiving method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110432549.4A CN102413576B (en) | 2011-12-21 | 2011-12-21 | Physical downlink control channel (PDCCH) transmitting and receiving methods and equipment |
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| CN102413576A true CN102413576A (en) | 2012-04-11 |
| CN102413576B CN102413576B (en) | 2014-04-09 |
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| CN201110432549.4A Active CN102413576B (en) | 2011-12-21 | 2011-12-21 | Physical downlink control channel (PDCCH) transmitting and receiving methods and equipment |
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| WO (1) | WO2013091406A1 (en) |
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Also Published As
| Publication number | Publication date |
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| WO2013091406A1 (en) | 2013-06-27 |
| CN102413576B (en) | 2014-04-09 |
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