CN105897373A

CN105897373A - Method and system for transmitting transmission block in downlink control channel

Info

Publication number: CN105897373A
Application number: CN201510037130.7A
Authority: CN
Inventors: 仲川
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-01-26
Filing date: 2015-01-26
Publication date: 2016-08-24
Anticipated expiration: 2035-01-26
Also published as: CN105897373B

Abstract

The present invention discloses a method and system for transmitting a transmission block in a downlink control channel. The method comprises the steps that: a base station selects an idle cell radio network temporary indicator and configures the idle cell radio network temporary indicator to a terminal as TBC-RNTI; the base station compares a transmission block to be sent and a preset threshold; if the transmission block size is not larger than a threshold value, the transmission block is configured into downlink control information (DCI) according to a predetermined rule, a transmission block mapping DCI (TB-DCI) is formed, a CRC cyclic check code is generated, and a TBC-RNTI is used to carry out the scrambling of the cyclic check code; the check codes of TB-DCI and TBC-RNTI scrambling are subjected to encoded modulation mapping to a physical downlink control channel (PDCCH) according to a present technical DCI processing mode; the terminal receives and decodes the PDCCH, and if the TBC-RNTI is detected, the decoded data forms a transmission block according to a predetermined rule, and the transmission block is submitted to an upper layer. The PDCCH detection ability of the terminal is effectively utilized, and the resource utilization rate of the system is improved.

Description

A kind of method and system transmitting transmission block at down control channel

Technical field

The present invention relates to the communications field, particularly to utilizing LTE physical downlink control channel transmission The method and system of data transmission block.

Background technology

LTE (Long Term Evolution, Long Term Evolution) project is the evolution of 3G, and it improves also Enhance the aerial access technology of 3G.Use OFDM (OFDM, Orthogonal Frequency Division Multiplexing) and MIMO (multiple-input and multiple-output, Multiple-Input Multiple-Out-put) as the sole criterion of its wireless network evolution.? The peak value speed of descending 100Mbit/s and up 50Mbit/s can be provided under 20MHz spectral bandwidth Rate.Improve the performance of Cell Edge User, improve cell capacity, and reduce system delay. LTE system of the present invention contains its follow-up evolution version such as LTE-A.

The down direction of LTE have employed OFDM (OFDM, Orthogonal Frequency Division Multiplexing), wherein, 1 radio frames of LTE comprises 10 sons Frame (subframe), 20 time slots (slot), each descending time slot is divided into again several OFDM symbol, Length according to CP is different, and the quantity of the OFDM symbol comprised is the most different.When using conventional CP Time, a descending time slot comprises 7 OFDM symbol；When use extension CP time, one descending time Gap comprises 6 OFDM symbol.In this time/frequency source block, Resource Unit (RE, Resource Element) it is a symbol and the resource of subcarriers definition, a Resource Block (RB/PRB, Resource Block/Phsical Resource Block) be 12 subcarriers and Running time-frequency resource occupied by one descending time slot.The frame structure of LTE and the Resource Block definition comprised Have different changes according to different scenes and configuration, describe a kind of possible example in FIG Son, method described in the invention is the most applicable, no in other possible structure configurations various It is confined to the description of Fig. 1.

LTE system can map different physical channel the most in each subframe to corresponding resource On, the resource describing these physical channels in fig. 2 maps signal.Head in resource maps First place CRS (cell reference signals), then place PCFICH (physical format instruction channel), Terminal system by obtaining the control area institute in this subframe to the decoding of PCFICH The time-domain symbol number occupied, generally base station system can configure 1-3 symbol as control Region processed, and the remaining symbol of this subframe is used for carrying PDSCH (physics as data area DSCH Downlink Shared Channel).Base station continues to place PHICH in control area, and (physics HARQ is (mixed Close autonomous retransmission) indicator channel), after completing the mapping of these resources, surplus in control area Under unused resources be extracted and renumber as PDCCH (physical down control letter Road) candidate resource.Relevant CRS, the concrete mapping ruler of PCFICH, PHICH can With with reference to TS36.211 standard.

Terminal system by obtaining the control zone in this subframe to the decoding of PCFICH Time-domain symbol number occupied by territory, generally base station system can configure 1-3 symbol work For control area, and the remaining symbol of this subframe will be used for carrier as Deta bearer region Manage the shared channel PDSCH that rolls off the production line.User data transmission block (TB, the Tranport that high-rise transmission comes Block), the process data in processes such as physical layer encoded modulation multiple antennas layer mappings are last It is mapped to physics to roll off the production line on shared channel PDSCH.

Base station places physics HARQ indicator channel PHICH in control area, completes this After a little resources map, in control area, remaining unused resources is extracted and renumbers Resource as physical downlink control channel PDCCH.

In LTE system, in order to effectively configure PDCCH and other down control channels, Define two special control channel resource units, resource unit group (REG, RE Group) With control channel particle (CCE, Control Channel Element)；Wherein, REG by 4 sub-carrier wave compositions adjacent on four frequency domains, and a CCE is made up of some REG, One PDCCH is made up of several CCE again, here there is multiple different PDCCH Form selects, and lists the parameter of PDCCH form 0-3 in Table 1.

PDCCH form	The CCE number comprised	The REG number comprised	The PDCCH bit comprised
				0	1	9	72
1	2	18	144
				2	4	36	288
3	8	72	576

Table 1

In LTE system, in order to be suitable for different transmission environments and demand, devise multiple DCI lattice Formula, to configure suitable transmission plan for corresponding UE, explicit or hidden in the information of DCI Contain includes the transmission parameter selected by this user, the resource distribution of such as this user, adjusts The information such as system/coding mode selection.

Under different transmission modes and bandwidth, DCI has different bit numbers, at table 2 In list the partial information of DCI format 1A as an example, complete information is at 3GPP TS36.212 can find:

Table 2

LTE system, according to this number and the channel conditions of corresponding UE, selects to meet biography The PDCCH form of transmission quality, after DCI information is generated CRC check code, uses C-RNTI After CRC check code is scrambled, form new check code.

The ultimate principle of CRC (CRC) is: splice R again after the information code of K position The check code of position, whole code length is N position, and therefore, this coding is also (N, K) code. For given (N, a K) code, may certify that one high math power of existence is N-K=R Multinomial G (x).The check code of K position information can be generated according to G (x), and G (x) is called The generator polynomial of this CRC code.The concrete generation process of check code is: assume to be sent Information multinomial C (X) represents, C (x) moves to left R position (can be expressed as C (x) * xR), this R position will be vacated in the right of sample C (x), here it is the position of check code.With C (x) * xR divided by The remainder that generator polynomial G (x) obtains is exactly CRC check code.

The combination of DCI and the data of check code is carried out chnnel coding and modulates to produce corresponding selecting The coded data of DCI format, the corresponding PDCCH data of DCI information.

PDCCH data will be mapped on physical resource according to the methods below,

First the residue RE Resource Access of control area out and is combined sequentially into/N_CCEIndividual CCE, defines search volume (search space) thereon, may be corresponding on a search volume Multiple PDCCH candidates.On search volume, the corresponding CCE of corresponding m-th PDCCH is

Formula 1

Wherein, i=0 ... L-1, L are the CCE number that selected PDCCH form is corresponding, also referred to as For the degree of polymerization；Y_k=(A Y_k-1) modD, Y_-1=n_RNTI≠ 0, A=39827, D=65537, n_sIt it is slot index in a 10ms radio frames.

RNTI is used for distinguishing the purposes of the information of carrying on PDCCH,

Define a series of RNTI value in a standard,

(1) SI-RNTI: system message；(2) P-RNTI: paging；(3) RA-RNTI: Indicate user and send out the Resource Block that random access guiding is used；(4) C-RNTI: customer service； (5) TPC-PUCCH-RNTI:PUCCH uplink power control information；(6) TPC-PUSCH-RNTI:PUSCH uplink power control information；(7) use of SPS C-RNTI Method is the same with C-RNTI, just uses the when of simply using semi-persistent scheduling.

The 3GPP system distribution to RNTI value described in table 3, from 3GPP TS36.3217.1 Joint

Table 3

A kind of RNTI is to have defined, and all of UE is required for monitoring, such as P-RNTI is FFFE, and SI-RNTI is FFFF, when UE detects the two RNTI value Time be known that the information carried above is for the signaling of paging or for high-rise SIB (system Chunk, System Information Block) signaling, another is dynamically distribution, such as Each UE can be allocated a unique C-RNTI, (community wireless network during accessing Network temporary mark, Cell Radio Network Temporary Identifier) detect as UE The when of with the RNTI value oneself mated, it is known that information above is belonging to oneself, When mapping this two category information, mapping position is different.If common signaling, then it is mapped to one Public search space, method is to take Y_k=0, if the signaling of terminal oneself, then according to formula 1 is mapped to the respective search volume of user.Be equivalent to the search volume of each user by pseudorandom Distribution.

In figure 3, under step 301-304 summarizes current technology base station side from generate DCI to Being mapped to four steps of PDCCH, described step 301, base station dispatcher generates descending control Information DCI, described step 302, the CRC check code of generation DCI, described step 303 is right The CRC check code C-RNTI bit phase that described step 302 generates scrambles with operation, Described step 304, coded modulation is also mapped on PDCCH candidate.

Step 305-307 describes the operating procedure that under current technology, end side detection DCI needs.

Described step 305, terminal, detecting PDCCH data when, needs to attempt all of PDCCH possible position and possible DCI length be demodulated decoding, in decoding to carrying information The data obtained include two parts, and one is the data message carried, and another part is school Test code.

Described step 306, the described check code C-RNTI solving described step 305 descrambles, Obtain CRC check code,

Described step 307, the CRC check code that the most described step 306 obtains has passed through carrying Data message CRC check rule, terminal just will be considered that and obtained correct DCI information.

After extracting correct DCI information, according to the information of DCI, terminal is extracted corresponding The data of PDSCH, and it is demodulated decoding by corresponding information to extracting data, process obtains Data composition TB is sent to upper strata.

During obtaining TB, need to decode through PDCCH decoding and PDSCH, by More in the RE number of PDSCH, so when the size of TB is less when, cause PDSCH Utilization rate relatively low, especially when needing the Information Number that transmits and the bit number of DCI close when, The transmission efficiency of system is the most aobvious lowly, and table 4 is the list of part small size TB, all supports TB size can find in 3GPP TS 36.213, wherein, N_PRBIt it is the number of scheduling RB Mesh, I_TBSIt is relevant with a Modulation order Product code Rate parameter, by the analysis to this form, See that the bit number of the bit number of part small size TB and DCI is close, such as, size in table A minimum TB is 16 bits, so for a 20MHz system, PRB number In the case of being 100, the bit number of DCI 1A about 33 bits, so transmit signaling Information is beyond the bit number of information itself, and the most also to distribute at least one PRB PDSCH.

Table 4

Simultaneously as terminal does not knows the transmission situation of base station, when base station side is PDCCH candidate On when do not send DCI information, terminal still to be done corresponding PDCCH decoding and examine Survey DCI information, define the waste of computing capability.

In LTE R11 version, introduce enhancement mode PDCCH (ePDCCH), be distribution subframe In middle Deta bearer region, resource RE is used for carrying DCI use, and a Resource Block RB gets rid of After falling demodulation reference mark DMRS (DeModulation Reference Signal), remaining RE presses 0 to 15 numbering cycle, RE composition enhancement mode REG (eREG) of same numbering, eREG Enhancement mode CCE (eCCE), one or more eCCE recompositions are constituted according to certain rule EPDCCH, concrete composition rule is with reference to 3GPP 36.211 standard.EPDCCH principle of compositionality and Being functionally similar to PDCCH, method described in the invention is the most applicable under ePDCCH.

Summary of the invention

The invention provides a kind of method and system transmitting transmission block at down control channel, should The small size transmission block meeting threshold requirement can be formulated on Physical Downlink Control Channel by method Being transmitted, release Resource Block, to large scale transmission block, improves the service efficiency of Resource Block.

For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:

The invention discloses a kind of method transmitting transmission block at down control channel, the method bag Include:

Cell-radio network interim designator (C-RNTI, the Cell-Radio that base station selection is idle Network Temporary Indicator), and it is allocated to terminal as transmission block cell-radio network Interim designator (TBC-RNTI, Transport Block C-RNTI)；

Base station arranges a threshold value, and the transmission block being ready for sending compares；If transmission Block size is not more than threshold value, then by pre-defined rule adaptation, this transmission block is entered Downlink Control Information In (DCI, Downlink Control Information), form TB and map DCI (TB-DCI, TB Mapping DCI), and use described TB C-RNTI to be circulated the scrambling of check code；TB-DCI The check code scrambled with described TBC-RNTI carries out coded modulation by current technology and is mapped to physics On down control channel, if transport block size is more than threshold value, this transmission block is encoded Modulation is mapped on Physical Downlink Shared Channel；

Terminal receives and decodes Physical Downlink Control Channel, if be detected that described TBC-RNTI, Then submit, by pre-defined rule composition transmission block, the data that solve to upper strata, if be detected that community without The interim designator of gauze network, then go to decode physical down according to the data solved as DCI and control Channel obtains transmission block, and submits upper strata to.

From above-mentioned, in the technical scheme that the present invention provides, it is provided that small size of knowing clearly transmission block (TB) in the transmission means of Physical Downlink Control Channel (PDCCH), threshold requirement will can be met Small size transmission block be formulated to PDCCH transmission, by the side of terminal distribution TBC-RNTI Method, effectively distinguishes Downlink Control Information DCI and carrying TB data.Technical scheme Need not the too much whole transmission of amendment and the transmission mechanism of technology, effectively make use of current skill The PDCCH power of test of terminal improve the resource utilization of system under art.

The present invention also disclosed a kind of system transmitting transmission block at down control channel.

Described system includes: base station and terminal；

Configuration parameter includes the transmission block mapping ruler to DCI and the choosing of TBC-RNTI Select；

Described base station includes:

Configuration module, for selecting the C-RNTI of free time to pass for transmission block as TBC-RNTI Defeated, and it is sent to terminal by high-level signaling；

Thresholding comparison module, for separating the transmission block that upper strata is sent, beyond the biography of threshold length Defeated piece can not be carried by physical downlink control channel PDCCH, uses current technology physical down Share channel PDSCH carrying；

Mapping block, for being mapped into the transmission block meeting threshold requirement according to predetermined rule DCI；

Scrambling module, carries out CRC check, and uses CRC check code the DCI mapped TBC-RNTI scrambling generates new check code；

Control transmission module, press for the DCI that will map and new check code and control channel Processing method generates PDCCH data and is finally mapped on PDCCH channel, integrates with subframe and sends out Send；

Described terminal includes:

Configuration module, for receiving the TBC-RNTI of base station configuration and preserving, and is believed by high level Order sends and confirms that message is to base station；

Control channel receiver module, be used for receiving subframe, detect PDCCH channel, obtain possibility DCI data, and will with TBC-RNTI verify correct DCI separate；

De-mapping module, extracts transmission block from the DCI correct with TBC-RNTI verification.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of a kind of frame structure in prior art；

Fig. 2 is physical channel and signal schematic representation in prior art；

Fig. 3 is that in prior art, base station and terminal send and receive the flow chart of DCI；

Fig. 4 is the flow chart that the present invention realizes transmitting on PDCCH small size transmission block；

Fig. 5 is the schematic diagram that in a kind of embodiment, transmission block is fitted to that a DCI processes；

Fig. 6 is the schematic diagram that in a kind of embodiment, transmission block is fitted to that multiple DCI processes；

When Fig. 7 is that in embodiment, transmission block is fitted to multiple DCI, have sent showing of a partition block It is intended to；

When Fig. 8 is that in embodiment, transmission block is fitted to multiple DCI, have sent showing of multiple partition block It is intended to；

Fig. 9 is TB/DCI/PDCCH/PDSCH relation schematic diagram under current techniques；

Figure 10 is the use of TB/DCI/PDCCH/PDSCH relation schematic diagram after the present invention；

Detailed description of the invention

In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings Describe the present invention with specific embodiment.

Fig. 4 is the method flow diagram transmitted by small size transmission block PDCCH in the present invention；As Described in Fig. 4,

Step 401, base station is that terminal selects a free transfer block cell-radio network to refer to temporarily Showing that symbol (C-RNTI), as TBC-RNTI, and is allocated to terminal, terminal preserves described TBC-RNTI。

Step 402, arranges a thresholding on base station, the transmission block (TB) that base station will be ready for sending This threshold value is compared；If greater than threshold value, then carry out step 404, otherwise walk Rapid 403.

Described threshold value, if base station limits transmission block TB and can only enter a DCI by global mapping, Then its maximum is as the criterion with described DCI length, the biography that preferred values then can carry with the length of DCI Defeated piece of greatest length determines, if base station can split transmission block TB, is mapped into multiple DCI, then Its maximum is as the criterion with described DCI length sum, and preferred values is carried transmission block by the plurality of DCI The greatest length of combination determines.

Step 403, is fitted to transmission block Downlink Control Information and forms the transmission block descending control of mapping Information TB-DCI；Produce CRC check code and scramble with TBC-RNTI；By TB-DCI and generation Check code modulate and be mapped to physical layer descending by current technology for encoding and control on channel.

Described step 403 can be divided into step 4031 to 4033 further:

Step 4031, is fitted to transmission block Downlink Control Information and forms the transmission block descending control of mapping Information TB-DCI processed,

Owing to the length of DCI and the length of transmission block are mated the most completely, need transmission block The rule being mapped into DCI presets, and base station and terminal preserve same rule, and terminal is permissible Transport block data is reversely extracted from TB-DCI according to described rule.

Step 4032, uses described TBC-RNTI to be circulated the scrambling of check code,

The mapping DCI that described step 4031 is generated, generates CRC check code through CRC, uses TBC-RNTI carries out scrambling and generates new check code, and the C-RNTI used due to terminal is different from TBC-RNTI, therefore will not be identified as TB-DCI physical layer descending and control information after decoding If DCI. step 4031 generates multiple TB-DCI, then each independently carry out this step.

Step 4033, the mapping DCI that described step 4031 generates generates together with described step 3042 Check code combination producing data, carry out coded modulation and be mapped to Physical Downlink Control Channel On PDCCH.In this step, the function such as PDCCH position computing is all used by current method C-RNTI, TBC-RNTI use when only generating new check code in described step 4032.This Sample terminal is made without extra PDCCH detection calculations.

If step 4031 generates multiple TB-DCI, then take multiple PDCCH channel, each The most corresponding PDCCH of TB-DCI.

Step 404, the transmission power formula of the transmission block TB that current technology uses.

It is enterprising that all of transmission block can be mapped to PDSCH channel by currently used technical approach Row transmission, small size transmission block can also be transmitted by step 404 by base station arrangements, and terminal is just Often receive.

Step 405, by current mode, controls channel and data channel combination forms subframe, concurrently Send.

Step 406, terminal received signals extracts physical layer down control channel are also controlled letter Road decodes, if matching transmission block cell-radio network interim designator TBC-RNTI, walks Rapid 407；If the coupling interim designator of cell-radio network, carry out step 408.

In described step 406, terminal by current mode to all possible PDCCH form and DCI format carries out PDCCH decoding, for each the data decoded, and its check code part Descrambling with C-RNTI, whether can with CRC unsuccessful verification, if using C-RNTI if then calculating Verify successfully, then explanation carrying data are DCI information, enter step 408.If used TBC-RNTI descrambles and verifies successfully, then explanation carrying information is TB-DCI, enters step 407. If the most unsuccessful, illustrate that detected PDCCH does not has effective content, abandon solving digital content.

Step 407, maps Downlink Control Information data TB-DCI by pre-defined rule from the TB solved Extract transmission block, submit high level to.

Described step 407 is the reverse computing of described step 4031, by predetermined from the data extracted Rule recovers data block TB.

Step 408, shares channel according to the Downlink Control Information DCI solved to physical layer descending and enters Row extracts and decodes, and obtains transmission block, submits high level to.

Fig. 5 is that in an embodiment of the present invention, base station is mapped into small size transmission block TB single DCI, and the flow chart that it is solved by terminal

Base station and terminal have been configured TBC-RNTI.

System is limited to single TB and is mapped into the situation of single DCI, it is assumed that base station limits employing DCI length is 33 bits, and the TB block preparing transmission has three kinds of situations of 16/24/32 bit.

Step 501, base station and terminal need employing to preset mapping ruler to be mapped into by TB block DCI constitutes TB-DCI,

Owing to described DCI length and TB block length are not mated, it is at carrying DCI and TB one a pair The when of answering, can directly arrange the bit extraction position fixed.

Multiple length TB all may be mapped into a DCI when, terminal needs district when extracting Dividing different TB length, transmission block is mapped to the regular one preferably scheme of DCI and should include referring to Show the information of carrying TB length.

One preferably implementation is as shown in table 5, and TB blocks of data is mapped into the forward bit in position Position, identifies different bit lengths with position bit different coding rearward, and idle bit can Fill with random.

TB length	33 DCI mapping rulers
		16	16 bit data positions, 15 random fillings, tail bits of encoded 11
24	24 bit data positions, 7 random fillings, tail bits of encoded 01
		32	32 bit data positions, tail bit is 0

Table 5

Step 502, base station is that TB-DCI calculates CRC check code,

Step 503, the CRC check code that described step 502 is generated by base station TBC-RNTI adds Disturb.

Step 504, the new school that the TB-DCI of described step 502 generation and described step 503 generate Test the step process such as the coded modulation that code used by current technology, be finally mapped to PDCCH, Base station sends.

Step 505, terminal carries out PDCCH detection according to current technology, to each number solved According to isolating possible DCI part and check code part.

Step 506, check code TBC-RNTI descrambles, and obtains CRC check code.

Step 507, described step 505 is isolated may DCI part be obtained with described step 506 CRC check code passes through CRC check, illustrates TB-DCI to be detected.

Step 508, presses pre-defined rule from mapping DCI and extracts transmission block TB from TB-DCI.

Pre-defined rule, if tail bit is 0, then extracts front 32 bits, such as tail ratio as shown in table 5 Specially for 01, then extract front 24 bits, if tail bit is 11, then extract front 16 bits.

About the setting of threshold value in the case of single DCI, need in partial bit position to be used for referring to The when of showing information such as including length, can reduce than this body length of DCI, can only be to determine rule Under the TB greatest length that can carry be as the criterion, maximum is 33 bits in this instance, actual door It is limited to 32 bits.

Fig. 6 is the flow chart that in an embodiment of the present invention, transmission block TB is mapped into multiple DCI,

Terminal, making PDCCH detection when, can be detected simultaneously by multiple DCI information, this Sample can improve the threshold value of carrying small size TB by the way of cascade maps DCI.Permit level The maximum of the number of the DCI of connection can successfully be detected the maximum of DCI in a subframe by terminal Number determines.But the TB of the loading condition and many DCI cascade carrying simultaneously taking account of PDCCH can To reach similar efficiencies with RB transmission, cascade number can be any limitation as by base station.

Step 601, splits into polylith by small size transmission block by pre-defined rule,

When a transmission block partition is mapped into multiple DCI, described transmission block is mapped to the rule of DCI Then one preferably scheme is should to include indicating multiple DCI to connect sequencing and/or DCI sum Purpose information.

It is assumed that system limits at most can cascade 4 33 bit DCI to carry transmission block, a kind of Preferably implementation is as shown in table 6

Table 6

Fig. 7 is the explanation of a usage of this application example, can map multiple in system configuration In the case of DCI, the schematic diagram of one 24 bit TB block of a sub-frame transmission.

33rd bit is 0, is 24 bit data positions before expression,

31-32 bit is 00, represents and is the use of a DCI in this subframe.

29-30 bit is 00, represents first partition block.

In this instance, described 24 bit TB blocks are mapped to a partition block, and total block data is also one.

Fig. 8 is the explanation of another usage of this application example, in the situation mapping multiple DCI Under, the schematic diagram of one 56 bit TB block of a sub-frame transmission.

56 bits are divided into 16,16,24 three partition blocks, and form 3 according to table 6 process successively Individual TB-DCI, rear five bits of encoded are respectively 00101,01101,10100.

Step 602, the TB-DCI that each described step 601 is formed, entered by base station maps respectively PDCCH transmits, and step is respectively with the embodiment of the single DCI of Fig. 5.

Step 603, terminal detects multiple TB-DCI by Fig. 5 single DCI step.

Step 604, multiple mapping DCI are pressed pre-defined rule and extract data combination of transmitted by terminal Block, submits upper strata to, and this step is the contrary operation of described step 601.

The operation of corresponding diagram 7 is the coding according to tail bits, it is judged that this subframe only one of which data The transmission block of a length of 24, extracts front 24 bits, is combined into transmission block TB.

The operation of corresponding diagram 8 is to encode according to tail bits, extracts respectively from three TB-DCI 16,16,24 bits, and judge that three transmission blocks all have been received by according to total block data bits of encoded, Der group according still further to block sequence number indication bit synthesizes transmission block TB.

About being mapped into the setting of threshold value in the case of multiple DCI, in this example, maximum is 33+33+33+33=132 bit, preferred values is to determine the multiple DCI permitted under rule by base station The greatest length that can carry transmission block combination determines, is 88 bits in this example.

The DCI selected can use different forms, such as, transmission block is respectively enterd 33 Among bit DCI 1A form and 55 bit 2 forms, according to difference and the transmission block of DCI format The mode of combination is different, and concrete mapping ruler can use different schemes, not be limited with this example, Terminal can correctly be combined into the transmission block TB data that base station sends out.

In the case of Fig. 9 and Figure 10 respectively describes prior art and uses latter two of the present invention, transmission The corresponding relation of block TB/DCI/PDCCH/PDSCH and effect schematic diagram.

As it is shown in figure 9, there are two terminals in system, terminal 1 is slight data terminal, warp Often receiving small size transmission block TB, under current technology, base station needs to distribute at least one R B and uses In transmission, another terminal is attached most importance to degrees of data terminal, occupies remaining whole resource.Terminal 1 TB 1 carries at PDSCH 1, on the DCI 1 that its corresponding physical message carries on PDCCH 1 Carrying, the TB 2 of terminal 2 carries at PDSCH 2, and its corresponding physical message is at PDCCH 2 Carry on the DCI 2 of upper carrying.

As shown in Figure 10, use the technology of the present invention, if small size transmission block TB is less than system Pre-determined threshold, in the case of can carrying on PDCCH, the TB 1 of terminal 1 is fitted into DCI 1, And finally it being mapped in PDCCH 1, PDSCH 1 resource the most originally occupied can discharge now Out, it is provided that use to terminal 2.

In sum, the invention provides small size transmission block (TB) and control letter at physical down The transmission means in road (PDCCH), can be formulated to the small size transmission block meeting threshold requirement PDCCH transmits, and by the method for terminal distribution TBC-RNTI, effectively distinguishes descending control Information DCI processed and carrying TB data.It is whole that technical scheme need not too much amendment Send and the transmission mechanism of technology, effectively make use of the PDCCH of terminal under current technology to detect Ability also improves the resource utilization of system.

A kind of system at down control channel transmission transmission block is as described below.

Described system includes: base station and terminal；

Described base station includes:

Described terminal includes:

The flow chart of data processing of intermodule is as described below.

By high-level signaling, the configuration module of base station and terminal confirms that TBC-RNTI and transmission block arrive After the mapping ruler of DCI, can start to transmit transmission block, a transmission block sent from upper strata First passing around thresholding comparison module, if meeting threshold requirement, mapping block can be entered, In mapping block, this transmission block can be mapped into one or more by the valid data position of pre-defined rule DCI, and be used for characterizing by pre-defined rule generation coding information on the remaining bits position of DCI simultaneously Valid data bit length, DCI order, total block data；The DCI generated generates CRC in scrambling module Check code also scrambles with TBC-RNTI, and the DCI of corresponding PDSCH adds being used herein as C-RNTI Disturb, owing to TBC-RNTI value is different from C-RNTI, therefore in end C-RNTI PDCCH detection can not will successfully detect the DCI with TBC-RNTI scrambling；Scrambled DCI and new check code transmit by controlling transmission module PDCCH；Terminal is by control Channel module processed is controlled Channel Detection, obtains possible DCI, and descrambles with TBC-RNTI, Select the successful DCI of verification and send into De-mapping module；At De-mapping module according to pre-defined rule From the DCI selected, reverse process obtains transport block data.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, Within should be included in the scope of protection of the invention.

Claims

1. the method transmitting transmission block at down control channel, it is characterised in that the method Including:

Base station arranges a threshold value, and the transmission block (TB, Transport Block) being ready for sending Compare；If transport block size is not more than threshold value, then this transmission block is pressed pre-defined rule Adaptation is entered in Downlink Control Information (DCI, Downlink Control Information), forms TB and reflects Penetrate DCI (TB-DCI, TB Mapping DCI), and use described TBC-RNTI to be circulated school Test the scrambling of code；The check code of TB-DCI and described TBC-RNTI scrambling is carried out by current technology Coded modulation is mapped to Physical Downlink Control Channel (PDCCH, Physical Downlink Control CHannel) on, if transport block size is more than threshold value, this transmission block is compiled Code modulation is mapped to Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared CHannel) on；

Method the most according to claim 1, it is characterised in that described transmission block community without Gauze network interim designator TBC-RNTI, in base station when small size transmission block is fitted to DCI, For carrying out the scrambling of DCI cyclic check code.

Method the most according to claim 1, it is characterised in that described adaptive formation During TB-DCI carries out coded modulation and is mapped to physical downlink control channel PDCCH, no Change original C-RNTI occupation mode as parameter.

Method the most according to claim 1, it is characterised in that described decoding terminals physics Down control channel PDCCH, detects described TBC-RNTI, is to make PDCCH candidate After controlling channel-decoding, obtain verifying correct result with TBC-RNTI.

Method the most according to claim 1, it is characterised in that if a terminal detects that use The physical downlink control channel PDCCH of described TBC-RNTI scrambling, then press pre-defined rule from solution Code extracting data data also submit upper strata to；If a terminal detects that the physics scrambled with C-RNTI Down control channel PDCCH, then decoding data are used for Physical Downlink Shared Channel as DCI The processing procedure of PDSCH.

Method the most according to claim 1, it is characterised in that base station receives from high level Meet the transmission block TB of pre-determined threshold requirement, after being mapped into Downlink Control Information DCI, by physics Down control channel PDCCH carries.

Method the most according to claim 1, it is characterised in that described predetermined threshold value, If base station limits transmission block TB can only enter a DCI by global mapping, then its maximum is with described DCI length is as the criterion, and the transmission block greatest length that preferred values then can carry with the length of DCI is true Fixed, if base station can split transmission block TB, be mapped into multiple DCI, then its maximum is with described DCI length sum is as the criterion, and preferred values is by the greatest length of the plurality of DCI carrying transmission block combination Determine.

Method the most according to claim 1, it is characterised in that when multiple transmission blocks all may be used When can be mapped into a DCI, described transmission block is mapped to the regular one preferably scheme of DCI should Including the information of instruction carrying transport block length, the data bit of described DCI is used to represent.

Method the most according to claim 1, it is characterised in that when a transmission block decouples When being mapped into multiple DCI, described transmission block is mapped to the regular one preferably scheme of DCI and should wrap Include the multiple DCI of instruction and connect sequencing and/or the information of DCI total number, use described DCI Data bit represent.

10. the system transmitting transmission block on down control channel, it is characterised in that should System includes: base station and terminal；

Described base station includes:

Described terminal includes: