CN101877621A - Sending method and sending device used for physical downlink control channel (PDCCH) in LTE-A system - Google Patents
Sending method and sending device used for physical downlink control channel (PDCCH) in LTE-A system Download PDFInfo
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Abstract
The invention discloses a sending method used for physical downlink control channel (PDCCH) distribution in an LTS-A system. The method comprises the following steps that: an eNB divides a carrier component (CC) into an anchor carrier component (Anchor CC) and a non-anchor carrier component (non-Anchor CC) for user equipment (UE); the eNB generates and sends downlink control information (DCI) on the Anchor CC of the UE; the eNB determines whether to send the existing LTE downlink control information (DCI) on the non-Anchor CC of the UE according to service and scheduling requirements; the UE searches the DCI sent by the eNB in the search space of the UE on the Anchor CC of a local node of each downlink subframe; and the UE closes a corresponding non-Anchor CC radio frequency channel within a certain time and determines a non-Anchor CC index needing detecting according to the analysis of each sub-domain information bit and a specific indication timing relation in the DCI sent to the eNB on the Anchor CC. By using the method, the problem how to close the non-Anchor CC radio frequency channel accurately and timely to reduce the energy consumption of the UE and prolong standby time according to the scheduling of the eNB when the UE of the LTE-A system works under the condition of a plurality of carrier components is solved; and simultaneously, the performance of the LET-A system is not affected.
Description
Technical field
The present invention relates to wireless communication system, more specifically, relate to a kind of indicating means of the descending control character position distribution in wireless communication system, to make things convenient for UE closed portion radio-frequency channel and then cut down the consumption of energy prolongs standby time timely and accurately.
Background technology:
Current, 3GPP standardization body has finished the formulation of LTE standard, and is formulating a new standard based on the LTE standard and be used to submit to the alternative of ITU tissue as IMT-Advance, and this standard is called as LTE-Advanced, abbreviates LTE-A as.The up employing of LTE-A system inserts (SC-FDMA) or use discrete Fourier transform (DFT) single carrier orthogonal frequency division multiplexing (Clustered DFT-S-OFDM) technology of sub-clustering in the 20M bandwidth based on single-carrier frequency division multiple access, is supported in interior upload control symbol (PUCCH) of 20M bandwidth and upstream data symbol (PUSCH) simultaneously and sends simultaneously.Descending employing is based on OFDM (OFDM) technology.Adopt two kinds of frame structures in the LTE-A system, the frame structure Class1 adopts Frequency Division Duplexing (FDD) (FDD), and frame structure type 2 adopts time division duplex (TDD).
At present, the method of LTE-A system applies carrier aggregation (Carrier aggregation) realizes that system bandwidth is configurable, each carrier wave unit is called a carrier wave element (CC, Component carrier), LTE terminal (UE, User Equipment) can be on each CC operate as normal (as shown in Figure 4), in the LTE-A system, maximum system bandwidth is 100M.
In the LTE system, eNB may send the Downlink Control Information (DCI, Downlink Control Information) of different-format for each UE according to the sending mode that UE disposed.The DCI form that is used for the up-downgoing scheduling of resource comprises following information: resource allocation (RA, Resource Allocation) information; Modulation coding information (MCS, Modulation and Coding rate) ... Deng.Be mapped to behind DCI information via after eNB will the encode coding on the physical resource of Physical Downlink Control Channel (PDCCH) of UE precognition, UE obtains the DCI information that eNB sends through the blind Detecting of limited number of time.The physics running time-frequency resource that PDCCH takies is made up of one or more control channel unit (CCE), and the number of CCE can be 1,2,4 or 8.In the LTE-A system, the DCI coded system comprises two candidate schemes, one is DCI combined coding (Joint-coding) mode of a plurality of CC, its two for each CC go up to use existing DCI form carries out absolute coding (Separate coding) in the LTE system. when DCI in the LTE-A system uses the absolute coding scheme, if utilize the DCI form of prior LTE system, UE needs to detect all CC to obtain whole DCI information that eNB sends in each subframe.Fig. 5 has described the structured flowchart of UE receiver in detail, we can be clear that from block diagram, if UE can close a plurality of CC without any this node DCI information timely and accurately simultaneously, the power consumption of terminal will significantly reduce, and then the stand-by time of prolongation terminal, this is significant for adopting battery powered portable terminal.
Summary of the invention:
The purpose of this invention is to provide sending method and dispensing device that a kind of LTE-A of being used for down control channel PDCCH of system distributes.
According to an aspect of of the present present invention, a kind of sending method that is used for the down control channel PDCCH of LTE-A system distribution comprises step:
A.eNB is that UE is divided into anchor carrier wave elements A nchor CC and non-anchor carrier wave element non-Anchor CC with carrier wave Elements C C;
B.eNB generates and sends Downlink Control Information DCI on the Anchor of UE CC;
Whether c.eNB sends existing LTE DCI information according to business and dispatching requirement decision on the non-Anchor of UE CC;
The d.UE DCI information that search eNB sends in oneself the search volume on the Anchor of each this node of descending sub frame CC;
E.UE closes corresponding non-Anchor CC radio-frequency channel within a certain period of time according to the parsing of each subdomain information bit and specific indication timing relationship in the DCI that eNB on the Anchor CC is sent, and need to determine the non-Anchor CC index of detection.
According to another aspect of the present invention, a kind of down control channel PDCCH of LTE-A system dispensing device that is used for comprises:
LTE DCI information bit maker, the message bit stream of output enters encoder 1;
AI domain information bit maker, the message bit stream of output enters encoder 2;
The bit cascade device carries out the bit cascade with the bit stream of encoder 1 and encoder 2 outputs;
Rate matchers is determined the bit number that can transmit in this frame and the bit stream after the cascade is carried out rate-matched according to the rate-matched principle of LTE to the bit stream of bit-level connection device output according to the number of the Resource Unit of available physical resource;
The bit stream of rate matchers output is launched with form of electromagnetic wave by antenna after treatment.
According to another aspect of the present invention, a kind of down control channel PDCCH of LTE-A system dispensing device that is used for comprises:
LTE DCI information bit maker, the message bit stream of output enters encoder 1;
AI domain information bit maker, the message bit stream of output enters encoder 2;
Rate matchers is determined the bit number that can transmit in this frame and the bit stream after the cascade is carried out rate-matched according to the rate-matched principle of LTE according to the number of the shared Resource Unit of the number of the Resource Unit of available physical resource and AI information bit;
The bit cascade device carries out the bit cascade with the bit stream of rate matchers and encoder 2 outputs;
The bit stream of bit cascade device output is launched with form of electromagnetic wave by antenna after treatment.
Adopt this method and dispensing device, the LTE-A system has solved LTE-A UE and has been operated under a plurality of carrier wave element conditions how accurately and timely to close the radio-frequency channel of non-Anchor CC so that lower the energy consumption of UE according to the scheduling of eNB, the problem of prolongs standby time, the while can not influence the performance of LTE-A system.
Description of drawings
Fig. 1 (a) is a transmitting end equipment block diagram 1 of the present invention;
Fig. 1 (b) is a transmitting end equipment block diagram 2 of the present invention;
Fig. 2 is a schematic diagram of the present invention;
Fig. 3 is a flow chart of the present invention;
Fig. 4 is the 10ms frame assumption diagram of LTE-A FDD system;
Fig. 5 is a UE receiver structure block diagram in the prior art;
Fig. 6 is a LTE-A DCI form new among the present invention;
Fig. 7 is the schematic diagram in AI territory in the DCI form among the present invention;
Fig. 8 is the application schematic diagram of duration indication subdomain in the AI of the present invention territory;
Fig. 9 is the mapping relations of duration indication subdomain in the AI of the present invention territory;
Figure 10 is the submethod flow chart of implicit expression indication non-Anchor CC DCI among the present invention;
Figure 11 is the submethod schematic diagram that shows DCI information on the indication non-Anchor CC among the present invention;
Figure 12 is the submethod flow chart that shows indication non-Anchor CC DCI among the present invention;
Figure 13 is first embodiment and the second embodiment schematic diagram among the present invention;
Figure 14 is the 3rd embodiment and the 4th an embodiment schematic diagram among the present invention.
Embodiment:
The present invention supposes that eNB passes through high-level signaling or specifies among a plurality of CC a CC as anchor carrier wave element (Anchor CC) separately for each UE when initialization inserts, other carrier wave element (CC) is called non-anchor carrier wave element (non-Anchor CC), and the DCI of each CC adopts the mode of absolute coding (Separate coding), as shown in Figure 4.
In description of the invention, as there is not special description UE to close the radio-frequency channel of some non-Anchor CC in a certain amount of time,, the radio-frequency channel of the non-Anchor of UE is in all the time opens or operating state.
Fig. 1 has provided two system block diagrams of the present invention, and a kind of transmitter block diagram of the present invention is shown in Fig. 1 (a):
100: existing variable length LTE DCI information bit maker: eNB generates the control information bit stream according to the scheduling indication of high level.
101: encoder 1: the output bit flow that is used for module 100 carries out chnnel coding.Wherein comprise two submodules:
101-0:CRC check digit maker: be used for generating the CRC check bit, and be attached to the information bit end according to message bit stream.
101-1: the convolution coder of truncation: be used for the output bit flow of module 101-0 is carried out the convolutional encoding processing of truncation.
Convenient for subsequent descriptions, suppose that the output information bitstream length of encoder 1 is K, be expressed as:
C＝{c
0，c
1，…，c
K-1}
102: the information bit maker in AI territory: eNB is according to the information that the schedule information of non-Anchor CC is generated independently AI among the present invention
Bit.
103: encoder 2: be used for the output bit flow of module 102 is carried out chnnel coding, principle is that the coded system that adopts is more reliable than the coded system of encoder 1, as adopting repeated encoding.
Convenient for subsequent descriptions, suppose that the output information bitstream length of encoder 2 is H, be expressed as:
A＝{a
0，a
1，…，a
H-1}
104: the bit cascade device carries out the output of module 103 and the output bit flow of module 101 to carry out the bit cascade according to order shown in Figure 7,
S＝{A，C}＝{a
0，a
1，…，a
H-1，c
0，c
1，…，c
K-1}
105: rate matchers: supposition The whole control symbol can with physical resource be T Resource Unit (Resource Element, RE), then rate matchers is determined the bit number that can transmit in this frame and the bit stream S after the cascade is carried out rate-matched according to the existing rate-matched principle of LTE to 104 output bit flow according to T.
106: scrambler: eNB generates scrambler according to the cell id (cell-ID) of self, and the output bit flow to 105 carries out scrambling, to eliminate the interference of a plurality of minizones.
107: modulator: the output bit flow with 106 becomes the signaling point in the signal constellation (in digital modulation)
108: layer mapper: the output symbol stream with 107 is mapped as a plurality of parallel data bit flows.
109: precoder: the pre-weighted that the data symbol stream with 108 sends, to reduce the influence of channel to data.
110: the resource mapper: 109 output symbol stream is mapped on the physical resource RE.
111:IFFT: the channel orthogonalization process is mapped as time-domain signal with frequency-region signal.
112: antenna: the radiofrequency signal power of transmitting set output is launched with form of electromagnetic wave.
Another kind of transmitter block diagram of the present invention is shown in Fig. 1 (b):
200: existing variable length LTE DCI information bit maker: eNB generates the control information bit stream according to the scheduling indication of high level.
201: encoder 1: the output bit flow that is used for module 100 carries out chnnel coding.Wherein comprise two submodules:
201-0:CRC check digit maker: be used for generating the CRC check bit, and be attached to the information bit end according to message bit stream;
201-1: the convolution coder of truncation: be used for the output bit flow of module 101-0 is carried out the convolutional encoding processing of truncation;
202: rate matchers: supposition The whole control symbol can with physical resource be T Resource Unit (Resource Element, RE), the RE number that the AI information bit accounts for is L, and then rate matchers is determined the bit number that can transmit in this frame and the bit stream S after the cascade is carried out rate-matched according to the existing rate-matched principle of LTE according to the numerical value of T-L.
Convenient for subsequent descriptions, suppose that the output information bitstream length of encoder 1 is A, be expressed as:
D＝{d
0，d
1…，d
A-1}
203: the information bit maker in AI territory: eNB is according to the information bit that the schedule information of non-Anchor CC is generated independently AI among the present invention.
204: encoder 2: be used for the output bit flow of module 102 is carried out chnnel coding, principle is that the coded system that adopts is more reliable than the coded system of encoder 1, as adopting repeated encoding.
Convenient for subsequent descriptions, suppose that the output information bitstream length of encoder 2 is H, be expressed as:
A＝{a
0，a
1，…，a
H-1}
205: the bit cascade device carries out the output of module 202 and the output bit flow of module 204 to carry out the bit cascade according to order shown in Figure 7,
S＝{A，D}＝{a
0，a
1，…，a
H-1，d
0，d
1，…，d
A-1}
206: scrambler: eNB generates scrambler according to the cell id (cell-ID) of self, and the output bit flow to 105 carries out scrambling, to eliminate the interference of a plurality of minizones.
207: modulator: the output bit flow with 106 becomes the signaling point in the signal constellation (in digital modulation)
208: layer mapper: the output symbol stream with 107 is mapped as a plurality of parallel data bit flows.
209: precoder: the pre-weighted that the data symbol stream with 108 sends, to reduce the influence of channel to data.
210: the resource mapper: 109 output symbol stream is mapped on the physical resource RE.
211:IFFT: the channel orthogonalization process is mapped as time-domain signal with frequency-region signal.
212: antenna: the radiofrequency signal power of transmitting set output is launched with form of electromagnetic wave.
The present invention comprises a kind of non-Anchor CC DCI distribution indicating means of low energy consumption, concrete flow process as shown in Figure 3:
Step 300:eNB generates and sends Downlink Control Information DCI respectively on Anchor CC and non Anchor CC.
Step 301:UE need search for the DCI information that eNB sends in the search volume at this node in the Anchor of each descending sub frame CC zone and only
Step 302:UE closes corresponding non-Anchor CC radio-frequency channel according to the parsing of each subdomain information bit in the format DCI territory that eNB on the Anchor CC is sent in certain period; And according to the numerical value of current subframe flag bit decision whether needs detect on each non-Anchor CC whether have DCI information in this subframe.
The present invention includes a kind of timing indexical relation, as shown in Figure 2, AI territory in the DCI that sends on n subframe Anchor CC is used for indication and whether sends DCI since the non-Anchor CC of (n+K), and the numerical value of K is included in the whole sub-district, system information inherence by eNB and broadcasts.
Comprise the new DCI form of a kind of LTE-A of being used for system among the present invention, this form only is used for using when eNB sends Downlink Control Information for it on the Anchor of LTE-A UE CC.In the present invention, new DCI form comprises two parts: first is called and distributes indication territory (AI territory, Assignment Indication), is used for the eNB demonstration or implicitly notifies on the follow-up non-Anchor CC of LTE-A UE whether can send DCI information; Second portion is the DCI information of the existing variable length of LTE system.In order to guarantee the reliability in AI territory, the encoding scheme different with having the DCI form adopted in the AI territory, is similar to the repeated encoding scheme of PCFICH channel in the LTE system as employing.Essence of the present invention is additional AI territory outside existing LTE DCI form, be used to indicate after K the subframe transmission situation of DCI on the non-Anchor CC, so that UE can determine whether closing or open a plurality of radio-frequency channels according to the detection to AI territory on the Anchor CC, and then reasonably cuts down the consumption of energy.Reduce the method for node energy consumption all within protection scope of the present invention based on above method of outside existing DCI form, adding independent domains.
The AI territory comprises two subdomains among the present invention: non-Anchor CC indication subdomain and duration (Duration) indication subdomain, as shown in Figure 7.
Wherein duration indication subdomain is used to indicate UE to work as non-Anchor CC indication subdomain when coming into force, the term of validity T of non-Anchor CC indication subdomain.As shown in Figure 8.In order to reduce the indication expense of system, system configuration F numerical value is used for the duration indication: T ∈ { T
0, T
1, T
2..., T
F-1, then the bit number in duration indication territory is M=log
2F, eNB indicates the concrete numerical value of UE duration by sending the duration index value, and concrete mapping relations are as shown in Figure 9.
According to the bit number and the physical meaning difference of non-Anchor CC indication subdomain, also comprise the indication submethod of DCI on two kinds of non-Anchor CC among the present invention, a kind of implicit expression indicating means that is called; Another kind is called explicit indicating means.Duration indicates the indicating means of subdomain identical in two kinds of submethods.
Show in the submethod at latent first finger, non-Anchor CC indication subdomain information bit length L=1, i.e. non-Anchor CC indication subdomain is { b
0, wherein concrete physics is as follows: supposition eNB sends this DCI information, then b on n subframe Anchor CC
0=1 is illustrated in the interior eNB non-Anchor CC at least therein of n+K subframe has sent DCI information, and UE need carry out blind Detecting DCI at each non-Anchor CC; b
0=0 is illustrated in no any DCI information transmission on all non-Anchor CC in the n+K subframe, and UE can close the radio-frequency channel of all non-Anchor CC to cut down the consumption of energy in this subframe.
The idiographic flow of implicit expression indicating means is as shown in figure 10 among the present invention:
Step 1000:eNB according to dispatching requirement decision whether at the new DCI of n subframe generation and on UE Anchor CC, send.To substep 300-3, concrete data bit flow handling process as shown in Figure 1 with the substep 300-0 among Fig. 3 for the detailed process that generates.
Step 1001:UE carries out blind Detecting in oneself the search volume on Anchor CC, detect whether eNB sends format on non-Anchor CC in this subframe Downlink Control Information DCI.
Step 1002:UE at first only detects the DCI information whether eNB on the Anchor CC sends format in each descending sub frame.
Step 1003: if UE detects the DCI information that eNB sends on Anchor CC, then UE reads the numerical value { b of non-Anchor CC indication subdomain information bit in the DCI information
0And check whether this bit is 1;
Step 1004: if the numerical value { b of non-Anchor CC indication subdomain information bit
0Be 1, and then the UE mark needs to carry out the DCI blind Detecting n+K subframe in the search volume of all non-Anchor CC, and concrete grammar is that DCI sense switch: Key (n+K)=True is set; Wherein in all subframes, DCI sense switch system default is set to false.
UE reads and writes down on the Anchor CC in the DCI information information of duration indication subdomain in the AI territory, and this information has indicated effective duration that n+K subframe DCI testing result continues, and supposes that the information in this information field is T.
Step 1005:UE judges whether current subframe has been labeled as and need carry out blind Detecting to non-Anchor CC promptly whether Key (n) is true (True).
Step 1006: if present frame is labeled as and need carries out blind Detecting to non-Anchor CC, UE carries out blind Detecting on all non-Anchor CC, search for the DCI information of this node.
Step 1007:UE closes all non-Anchor passages till the needs of follow-up first UE mark carry out the subframe of blind Detecting.Be radio-frequency channel to the n+g subframe of closeall non-AnchorCC, wherein g satisfies following condition:
Key(n+c)＝false；0＜c＜g
Key(n+g)＝true
Need open the passage of all non-Anchor CC at n+g subframe UE.
In showing the indication submethod, eNB is divided into a plurality of groups with non-Anchor CC in advance, and number W (W 〉=1) and the mapping relations of non-Anchor CC are in common knowledge by eNB and UE in each group.For convenience of description, with the number that on behalf of non-Anchor CC, symbol I organize, then the information bit length of non-Anchor CC indication subdomain is L=I, as shown in figure 11, and then:
Non-Anchor CC indicates subdomain={ b
0, b
1, b
2..., b
L-1}
Wherein if eNB is the bit in the AI territory of n subframe of setting: b
i=1 (0≤i≤L-1), then represent on i non-Anchor group of n+K subframe and sent DCI information, need be opened the DCI sense switch of correspondence; Otherwise, b
i=0 (0≤i≤L-1) represent the DCI sense switch of i non-Anchor group of n+K subframe in this subframe, not need to do any operation.
The idiographic flow of demonstration indication submethod is as shown in figure 12 among the present invention:
For convenience, in the method Key (a b) represents the numerical value of DCI sense switch in b non-AnchorCC of a subframe group, and non-Anchor CC group system default settings all in all subframes are false.
Step 1200:eNB according to dispatching requirement decision whether at the new DCI of n subframe generation and on UEAnchor CC, send.The detailed process that generates with the substep 300-0 among Fig. 3 to the concrete bit-level handling process of substep 300-3. as shown in Figure 1.
Step 1201:UE carries out blind Detecting in oneself the search volume on Anchor CC, detect eNB and whether sent new DCI, UE is changed to vacation, that is: Key (all subframe, all non_Anchor CC)=false with the sense switch acquiescence of all non-Anchor CC groups.
Step 1202 described below～step 1214 is the specific implementation method of step 302 in the corresponding system block diagram 3 in the explicit indicating means:
Step 1202:UE at first only detects the DCI information whether eNB on the Anchor CC sends format in each descending sub frame
Step 1203: if UE detects the DCI information that eNB sends on Anchor CC, then UE reads the numerical value of duration indication subdomain in the DCI information, supposes that this numerical value is T.
Step 1204:UE sets counter values j=0;
Step 1205:UE reads in the bit information of the non-AnchorCC indication subdomain of detected specific format DCI information on the Anchor CC: { b
j, and judge b
jWhether equal 1.
Step 1206: if b
jWhether equal 1. and Key (n+m, j)=two conditions of falseUE satisfy simultaneously, UE is by setting:
Key(n+m，j)＝true，m＝K，…，K+T-1
Identify UE and need in the search volume of each CC node, detect the DCI that eNB sends since each CC in j non-AnchorCC group of a n+K subframe continuous T sub-frame search.
Step 1207:UE need detect the subframe that j non-Anchor CC organizes since the radio-frequency channel that n+1 subframe closed j non-Anchor CC group until the next one, and promptly to g subframe, wherein g satisfies following condition:
Key (g, j)=true, wherein g＞n, and Key (c, j)=false, n＜c＜g
Step 1208:UE judges whether that the group of all non-Anchor CC has traveled through and finishes;
Step 1209: if do not travel through all non-Anchor CC, counter j=j+1 then, repeated execution of steps 1205 to 1208.
Step 1210:UE sets counter values f=0;
Step 1211:UE judges whether the sense switch of f non-Anchor CC is opened in the current subframe, that is: Key (n, f)=whether true set up.
Step 1212:UE detects on each CC in f non-Anchor CC group, searches for the DCI information of this node.
Step 1213:UE judges whether that the group of all non-Anchor CC has traveled through and finishes.
Step 1214: if travel through all non-Anchor CC group, counter f=f+1 then, repeated execution of steps 1211 to 1213.
Step 1215: process ends.
Embodiment
Below in conjunction with Figure 13 and Figure 14, the specific embodiment according to implicit expression indication submethod in the technical solution of the present invention and demonstration indicating means is described.For the purpose of clear and concise, in the following description, omitted detailed description to known function.
In the following description, suppose:
AI territory in the DCI that sends on n subframe Anchor CC is used for indication and whether sends DCI since the non-Anchor CC of (n+K), in this example K=4;
Contain G+1 CC in the whole LTE-A system, wherein 1 Anchor CC has G non-Anchor CC in addition, is divided into M non-Anchor CC group, in the present embodiment, and G=4, M=2; Wherein non-Anchor CC group 0 is { non-Anchor CC0, non-Anchor CC1}; Non-Anchor CC group 1 is { non-Anchor CC2, non-Anchor CC3}.
The numerical value of duration indication subdomain is in the interior AI territory of special DCI form: T ∈ { T
0, T
1, T
2..., T
F-1, F=2 in the present embodiment; T
0=10; T
1=20 or F=0, do not comprise duration indication subdomain in the promptly special DCI form, only comprise non-Anchor CC indication subdomain.
First embodiment:
Present embodiment is applicable to that eNB adopts the non-Anchor CC radio-frequency channel that implicit expression indication submethod indicates UE to close does not timely and accurately have DCI information to send, and has reduced the energy consumption of UE, the stand-by time that has prolonged UE when guaranteeing systematic function.Suppose as shown in figure 13 that in the present embodiment the DCI sense switch system initialization of all subframes is a closed condition, i.e. Key (all subframes)=false.Step 1000:eNB generates and sends special DCI bit information n subframe and indicates its blind Detecting that need carry out DCI in the radio-frequency channel that the n+4 subframe is opened all non-Anchor CC, n=5 in the present embodiment for indication UE;
The DCI information bit that generates is as follows: the length of duration indication subdomain is log
2F=log
22=1 bit.In the present embodiment, T=10 is so the information bit of duration indication subdomain is { d
0, d
0=0; The information of non-Anchor CC indication subdomain is b
0=1.eNB cascades up information bit according to Fig. 7, the method according to Fig. 1 and Fig. 3 is mapped to UE on the space of Anchor CC with information bit then.
Step 1001:UE carries out blind Detecting in oneself the search volume on the Anchor CC of the 5th subframe, detect eNB and whether sent DCI information.
Step 1002:UE detects eNB the 5th subframe and has sent DCI information.
Step 1003:UE judges through the decoding back whether the information bit position of non-Anchor CC indication subdomain is " 1 ", that is:
b
0Whether=1 set up.
Step 1004:UE parses: b
0=1; Then the UE mark needs to carry out the DCI blind Detecting n+K=5+4=9 subframe in the search volume of all non-Anchor CC; UE resolves the information of duration indication subdomain in the AI territory simultaneously, and information bit is { d in the present embodiment
0, d
0=0, then UE is known term of validity T=10; The UE mark since the 9th subframe until the radio-frequency channel that 9+T=9+10=19 subframe need be opened (not comprising the 19th subframe) all non-Anchor CC always, that is:
Key (i)=true is i=9 wherein, and 10,11 ... ..18
Step 1005:UE checks whether exist effective non-Anchor CC to detect configuration, promptly UE checks whether current subframe DCI sense switch is opened, and whether Key (n)=Key (5)=true sets up.
Step 1006: because in the present embodiment, Key (n)=Key (5)=true is false, so need not execution in step 906.
Step 1007:UE detects the subframe label a that following first DCI sense switch is opened, and closes all non-Anchor CC from next subframe and (do not comprise subframe a) until subframe a.A=9 in the present embodiment is so UE closes the radio-frequency channel of all non-Anchor CC until subframe 9.
Second embodiment:
Present embodiment is applicable to that eNB adopts the non-Anchor CC radio-frequency channel that implicit expression indication submethod indicates UE to close does not timely and accurately have DCI information to send.In this example as shown in figure 13, suppose that eNB sends DCI indication UE setting DCI sense switch the 5th subframe and is true (True), UE has finished respective settings (processing procedure such as embodiment 1); ENB sends DCI indication UE setting DCI sense switch once more in subframe 17 and is true (True), and concrete steps are as follows:
Step 1000:eNB generates and sends special DCI bit information n subframe and indicates its blind Detecting that need carry out DCI in the radio-frequency channel that the n+4 subframe is opened all non-Anchor CC, n=17 in the present embodiment for indication UE;
The DCI information bit that generates is as follows: the length of duration indication subdomain is log
2F=log
22=1 bit.In the present embodiment, T=10 is so the information bit of duration indication subdomain is { d
0, d
0=0; The information of non-Anchor CC indication subdomain is b
0=1.eNB cascades up information bit according to Fig. 7, the method according to Fig. 1 and Fig. 3 is mapped to UE on the space of Anchor CC with information bit then.Step 1001:UE carries out blind Detecting in oneself the search volume on the Anchor CC of the 17th subframe, detect eNB and whether sent DCI information.
Step 1002:UE detects eNB the 17th subframe and has sent DCI information.
Step 1003:UE judges through the decoding back whether the information bit position of non-Anchor CC indication subdomain is " 1 ", that is:
b
0Whether=1 set up.
Step 1004:UE parses: b
0=1; Then the UE mark needs to carry out the DCI blind Detecting n+K=17+4=21 subframe in the search volume of all non-Anchor CC; UE resolves the information of duration indication subdomain in the AI territory simultaneously, and information bit is { d in the present embodiment
0, d
0=0, then UE is known term of validity T=10; The UE mark since the 17th subframe until the radio-frequency channel that the 17+T=17+10=27 subframe need be opened (not comprising the 27th subframe) all non-Anchor CC always, that is:
Key (i)=true is i=17 wherein, and 10,11 ... ..26
Step 1005:UE checks whether exist effective non-Anchor CC to detect configuration, promptly UE checks whether current subframe DCI sense switch is opened, and whether Key (n)=Key (17)=true sets up.
Step 1006: because in the present embodiment, Key (n)=Key (17)=true sets up, and UE need travel through all non-Anchor CC detection eNB and whether send DCI information on some non-Anchor CC.
Step 1007:UE detects the subframe label a that following first DCI sense switch is opened, and from next subframe close all non-Anchor CC until subframe a (do not comprise subframe a). a=18 in the present embodiment, so UE has the operation of any non-Anchor of closing CC radio-frequency channel.
The 3rd embodiment
Present embodiment is applicable to that eNB adopts explicit indication submethod to indicate UE to close timely and accurately and do not have the radio-frequency channel of the non-Anchor CC group of DCI information transmission.Suppose as shown in figure 14 that in the present embodiment the DCI sense switch system initialization of all subframes is a closed condition, i.e. Key (all subframes, all non-Anchor CC groups)=false.
Step 1200:eNB n subframe generate and send special DCI bit information give indication UE indicate its need be in the n+4 subframe be opened certain non-Anchor CC group the radio-frequency channel of all CC carry out the blind Detecting of DCI, n=5 in the present embodiment;
The DCI information bit that generates is as follows: the length of duration indication subdomain is log
2F=log
22=1 bit.In the present embodiment, T=10 is so the information bit of duration indication subdomain is { d
0, d
0=1; The information bit length of non-Anchor CC indication subdomain is L=M=2; Information bit in the territory is { b
0, b
1, because opening non-Anchor CC at subframe 5 indication UE on corresponding subframe, eNB organizes 0 radio-frequency channel; Then Dui Ying bit is for being set to:
b
0＝1；b
1＝0。
ENB cascades up information bit according to Fig. 7, the method according to Fig. 1 and Fig. 3 is mapped to UE on the space of Anchor CC with information bit then.
Step 1201:UE carries out blind Detecting in oneself the search volume on the Anchor CC of the 5th subframe, detect eNB and whether sent DCI information.
Step 1202:UE detects eNB the 5th subframe and has sent DCI information.
Step 1203:UE reads the bit information { d of DCI AI territory duration subdomain
0, in this enforcement, d
0=0, then UE learns that the term of validity of DCI switch is T=10.
Step 1204:UE sets counter j=0.
Step 1205:UE judges the information bit position of non-Anchor CC indication subdomain in the DCI information A I territory:
b
jWhether=1 set up.If set up and then enter step 1206, otherwise enter step 1207.
In the present embodiment, this expression formula is set up, and UE enters step 1206.
Step 1206: in this example, b
0=1. a UE mark begins continuous T=10 subframe from subframe n+K=5+4=9, and UE need open the DCI sense switch of j non-Anchor CC group, and concrete implementation method is:
Key(i，j)＝true；i＝9，10，11，12，13，......，18
Step 1207:UE detects the subframe label a that following first DCI sense switch is opened, and from next subframe close all non-Anchor CC until subframe a (do not comprise subframe a). a=9 in the present embodiment, so UE closes all CC radio-frequency channels of non-Anchor CC group j until subframe 9..Step 1208:UE judges whether that all non-Anchor CC group has traveled through and finishes promptly whether j＜M-1 sets up; Enter step 1109 if set up; Otherwise enter step 1110;
Step 1209: counter j accumulates 1; Promptly carry out following operation: j=j+1; Repeated execution of steps 1205～step 1207.
Step 1210:UE sets counter f=0.
Whether step 1211:UE detects the sense switch of f non-Anchor CC of current subframe and opens, promptly expression formula: Key (n, f)=whether true set up.Enter step 1212 if set up; Otherwise directly enter
Step 1212:UE searches for f each CC in the non-Anchor CC group in current subframe, detects eNB and whether has sent DCI information.
Step 1213:UE adds one with counter accumulative total, i.e. f=f+1.
Step 1214:UE judges whether that all non-Anchor CC groups traveled through, and promptly whether f＜M-1=2-1=1 expression formula is set up, and M is the number of the non-Anchor CC group in the system.Then entered step 1215 if set up; Otherwise begin to re-execute from step 1211.
Step 1215: finish.
The 4th embodiment
Present embodiment is applicable to that eNB adopts explicit indication submethod to indicate UE to close timely and accurately and do not have the radio-frequency channel of the non-Anchor CC group of DCI information transmission.Suppose as shown in figure 14 that in the present embodiment the DCI sense switch system initialization of all subframes is a closed condition, i.e. Key (all subframes, all non-Anchor CC groups)=false: and in this example, suppose that the 3rd embodiment takes place.
Step 1200:eNB n subframe generate and send special DCI bit information give indication UE indicate its need be in the n+4 subframe be opened certain non-Anchor CC group the radio-frequency channel of all CC carry out the blind Detecting of DCI, n=12 in the present embodiment;
The DCI information bit that generates is as follows: the length of duration indication subdomain is log
2F=log
22=1 bit.In the present embodiment, T=10 is so the information bit of duration indication subdomain is { d
0, d
0=1; The information bit length of non-Anchor CC indication subdomain is L=M=2; Information bit in the territory is { b
0, b
1, because eNB indicates UE to open the radio-frequency channel of non-AnchorCC group 1 on corresponding subframe in subframe 12 in the present embodiment; Then Dui Ying bit is for being set to:
b
0＝0；b
1＝1。
ENB cascades up information bit according to Fig. 7, the method according to Fig. 1 and Fig. 3 is mapped to UE on the space of AnchorCC with information bit then.
Step 1201:UE carries out blind Detecting in oneself the search volume on the Anchor CC of the 12nd subframe, detect eNB and whether sent DCI information.
Step 1202:UE detects eNB the 12nd subframe and has sent DCI information.
Step 1203:UE reads the bit information { d of DCIAI territory duration subdomain
0, in this enforcement, d
0=0, then UE learns that the term of validity of DCI switch is T=10.
Step 1204:UE sets counter j=0.
Step 1205:UE judges the information bit position of non-Anchor CC indication subdomain in the DCI information A I territory: b
jWhether=1 set up.Then enter step 1206 if set up; Otherwise enter step 1207. in this example, b
0=0, then UE need not to do any operation about DCI sense switch Key, directly enters step 1207.
Step 1206: if b
j=1 sets up.UE needs mark to begin continuous T=10 subframe from subframe n+K=5+4=9, and UE need open the DCI sense switch of j non-Anchor CC group, and concrete implementation method is:
Key(i，j)＝true；i＝16，17，18，19，20，......，25
Step 1207:UE detects the subframe label a that following first DCI sense switch is opened, and from next subframe close all non-Anchor CC until subframe a (do not comprise subframe a). during in the present embodiment as j=0, a=13 is so UE can not close the radio-frequency channel of non-Anchor CC group 0; And when j=1, a=16 is so UE can close the radio-frequency channel of non-Anchor CC group 1 up to subframe 16 when j=1.
Step 1208:UE judges whether that all non-Anchor CC group has traveled through and finishes promptly whether j＜M-1=1 sets up; Enter step 1209 if set up; Otherwise enter step 1210;
Step 1209: counter j accumulates 1; Promptly carry out following operation: j=j+1; Repeated execution of steps 1205～step 1207.
Step 1210:UE sets counter f=0.
Whether step 1211:UE detects the sense switch of f non-Anchor CC of current subframe and opens, promptly expression formula: Key (n, f)=whether true set up.Enter step 1212 if set up; Otherwise directly enter
Step 1212:UE searches for f each CC in the non-Anchor CC group in current subframe, detects eNB and whether has sent DCI information.
Step 1213:UE adds one with counter accumulative total, i.e. f=f+1.
Step 1214:UE judges whether that all non-Anchor CC groups traveled through, promptly
Whether f＜M-1=2-1=1 expression formula is set up, and M is the number of the non-Anchor CC group in the system.Then entered step 1215 if set up; Otherwise begin to re-execute from step 1211.
Step 1215: finish.
Claims (36)
1. one kind is used for the sending method that the down control channel PDCCH of LTE-A system distributes, and comprises step:
A.eNB is that UE is divided into anchor carrier wave elements A nchor CC and non-anchor carrier wave element non-Anchor CC with carrier wave Elements C C;
B.eNB generates and sends Downlink Control Information DCI on the Anchor of UE CC;
Whether c.eNB sends existing LTE DCI information according to business and dispatching requirement decision on the non-Anchor of UE CC;
The d.UE DCI information that search eNB sends in oneself the search volume on the Anchor of each this node of descending sub frame CC;
E.UE closes corresponding non-Anchor CC radio-frequency channel within a certain period of time according to the parsing of each subdomain information bit and specific indication timing relationship in the DCI that eNB on the Anchor CC is sent, and need to determine the non-Anchor CC index of detection.
2. method according to claim 1, wherein in step a, different UE has different Anchor CC and non-Anchor CC.
3. method according to claim 1, wherein in step b, Downlink Control Information DCI comprises two parts: first is used for whether can sending DCI information on the follow-up non-Anchor CC of eNB notice UE for distributing indication AI territory, territory; Second portion is the DCI information of the existing variable length of LTE system.
4. method according to claim 1, wherein in step e, specific indication timing relationship is meant that the AI territory of the DCI that sends on n the subframe Anchor CC is used for indication and whether sends DCI since the non-Anchor CC of (n+K), and the numerical value of K is included in the inherent whole sub-district of system information by eNB and broadcasts.
5. method according to claim 1, wherein in step e, UE decides the duration of closing non-Anchor CC radio-frequency channel and determines the non-Anchor CC index that needs detect according to the numerical value of DCI sense switch, and the DCI sense switch of all subframes is closed condition when system initialization.
6. method according to claim 3, wherein DCI information two parts of the existing variable length in the AI territory of Downlink Control Information DCI and LTE system adopt independently encoding scheme.
7. method according to claim 3, wherein the AI territory of special format Downlink Control Information DCI is made of two subdomains again: non-Anchor CC indication subdomain and duration (Duration) indication subdomain, wherein the representative of duration indication subdomain is with the term of validity of the indication of the non-Anchor CC in DCI information subdomain.
8. method according to claim 7, wherein whether duration indication subdomain exists and depends on system configuration.
9. method according to claim 7, wherein the bit length of duration indication subdomain is M=log
2F, F is the number of the non-Anchor CC indication subdomain term of validity of system configuration in the formula, promptly the non-Anchor CC term of validity that can use of system is:
T＝{T
0，T
1，T
2，....，T
F-1}
Period T
F-1Be mapped as the binary numeral of F-1, and send to UE by duration indication subdomain.
10. method according to claim 7, wherein non-Anchor CC subdomain Nepit indicating means comprises implicit expression indication submethod.
11. method according to claim 10, wherein in implicit expression indication submethod, non-Anchor CC indication subdomain information bit length is 1, promptly uses { b
0Represent.
12. method according to claim 11, wherein in the implicit expression indication submethod, UE all can detect the numerical value of current subframe DCI sense switch at each descending sub frame, and determines whether in current subframe all non-Anchor CC being carried out blind Detecting according to the numerical value of current subframe DCI sense switch.
13. method according to claim 11, wherein in the implicit expression indication submethod, UE can determine whether according to up-to-date DCI sense switch setting beginning closeall non-Anchor CC radio-frequency channel from next subframe after each descending sub frame DCI detects end.
14. method according to claim 7, wherein non-Anchor CC subdomain Nepit indicating means comprises demonstration indication submethod.
15. method according to claim 14, in the wherein explicit indication submethod, eNB at first is divided into non-Anchor CC M group.
16. method according to claim 11 wherein if UE receives the information of the non-Anchor CC indication subdomain in the DCI in n subframe is: " b
0=1 ", the duration information of duration indication subdomain is T in the same DCI, and then UE will open since the DCI sense switch of the continuous T subframe of n+K subframe:
Key(i)＝true，i＝n+K，n+K+1，...，n+K+T-1
In the formula: Key (i) represents the DCI sense switch numerical value of i subframe.
17. in the method according to claim 12, wherein, UE finds to open at n subframe DCI sense switch if checking, be Key (n)=true, then UE will carry out blind Detecting in the search volume of all this nodes of non-Anchor CC, receive the DCI information that eNB sends.If Key (n)=false, then UE does not need non-Anchor CC is carried out blind Detecting.
18. method according to claim 13, UE closes all non-Anchor CC radio-frequency channels up to a subframe, and wherein a satisfies following condition:
Key(c)＝false；n＜c＜a；Key(a)＝true.
In the formula: Key (c) represents the DCI sense switch numerical value of c subframe.
19. in the method according to claim 14, wherein in showing indicating means, non-Anchor CC indication subdomain information bit length is M, wherein M is the number of the group of non-Anchor CC.
20. method according to claim 19, non-Anchor CC indication subdomain information bit is expressed as:
Non-Anchor CC indication subdomain information bit={ b
0, b
1, b
2..., b
M-1}
Bit { b then
i(0≤i≤M-1) is used for the indication to i non-Anchor CC group; If UE has received the spy at subframe n
The DCI information of different form, and b
i=1, the duration information of duration indication subdomain is T in the same DCI; Then UE need be with subframe n+K
The DCI sense switch of last i non-Anchor CC group is opened, promptly
Key(i，j)＝true；i＝n+K，n+K+1，n+K+2，...，n+K+T-1
In the formula, (on behalf of p non-Anchor CC of o subframe, o p) organize the numerical value of sense switch to Key.
21. method according to claim 20, UE is after each descending sub frame DCI detects end, up-to-date DCI sense switch is organized according to each non-Anchor CC in the capital: (o, numerical value p) determine whether beginning to close non-Anchor CC radio-frequency channel from next subframe Key.
22. method according to claim 21, UE closes p non-Anchor CC radio-frequency channel up to a subframe, and wherein a satisfies following condition:
Key(c，p)＝false；n＜c＜a；Key(a，p)＝true.
In the formula: Key (c, p) the DCI sense switch numerical value of representing p non-Anchor CC of c subframe to organize.
23. one kind is used for the down control channel PDCCH of LTE-A system dispensing device, comprises:
LTE DCI information bit maker, the message bit stream of output enters encoder 1;
AI domain information bit maker, the message bit stream of output enters encoder 2;
The bit cascade device carries out the bit cascade with the bit stream of encoder 1 and encoder 2 outputs;
Rate matchers is determined the bit number that can transmit in this frame and the bit stream after the cascade is carried out rate-matched according to the rate-matched principle of LTE to the bit stream of bit-level connection device output according to the number of the Resource Unit of available physical resource;
The bit stream of rate matchers output is launched with form of electromagnetic wave by antenna after treatment.
24. dispensing device according to claim 23, wherein, described LTE DCI information bit maker is the scheduling indication generation control information bit stream of eNB according to high level.
25. dispensing device according to claim 23, wherein, described encoder 1 comprises:
CRC check position maker is used for generating the CRC check bit according to message bit stream;
The convolution coder of truncation carries out the convolutional encoding processing of truncation to the bit stream of CRC check position maker output.
26. dispensing device according to claim 23, wherein, described AI domain information bit maker is that eNB is according to the information bit that the schedule information of non-anchor CC is generated independently AI.
27. dispensing device according to claim 23, wherein, encoder 1 uses different encoding schemes with encoder 2.
28. dispensing device according to claim 27, wherein, the encoding scheme of encoder 2 is more reliable than the encoding scheme of encoder 1.
29. square law device according to claim 28, wherein, the coded system that encoder adopts is a repeated encoding.
30. one kind is used for the down control channel PDCCH of LTE-A system dispensing device, comprises:
LTE DCI information bit maker, the message bit stream of output enters encoder 1;
AI domain information bit maker, the message bit stream of output enters encoder 2;
Rate matchers is determined the bit number that can transmit in this frame and the bit stream after the cascade is carried out rate-matched according to the rate-matched principle of LTE according to the number of the shared Resource Unit of the number of the Resource Unit of available physical resource and AI information bit;
The bit cascade device carries out the bit cascade with the bit stream of rate matchers and encoder 2 outputs;
The bit stream of bit cascade device output is launched with form of electromagnetic wave by antenna after treatment.
31. dispensing device according to claim 30, wherein, described LTE DCI information bit maker is the scheduling indication generation control information bit stream of eNB according to high level.
32. dispensing device according to claim 30, wherein, described encoder 1 comprises:
CRC check position maker is used for generating the CRC check bit according to message bit stream;
The convolution coder of truncation carries out the convolutional encoding processing of truncation to the bit stream of CRC check position maker output.
33. dispensing device according to claim 30, wherein, described AI domain information bit maker is that eNB is according to the information bit that the schedule information of non-anchor CC is generated independently AI.
34. dispensing device according to claim 30, wherein, encoder 1 uses different encoding schemes with encoder 2.
35. dispensing device according to claim 34, wherein, the encoding scheme of encoder 2 is more reliable than the encoding scheme of encoder 1.
36. square law device according to claim 35, wherein, the coded system that encoder adopts is a repeated encoding.
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|---|---|---|---|
| CN2009101379086A CN101877621A (en) | 2009-04-30 | 2009-04-30 | Sending method and sending device used for physical downlink control channel (PDCCH) in LTE-A system |
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|---|---|---|---|
| CN2009101379086A CN101877621A (en) | 2009-04-30 | 2009-04-30 | Sending method and sending device used for physical downlink control channel (PDCCH) in LTE-A system |
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|---|---|
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|---|---|---|---|
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Application publication date: 20101103 |