CN102468910A - Detection method of physical downlink control channel of RN and apparatus thereof - Google Patents
Detection method of physical downlink control channel of RN and apparatus thereof Download PDFInfo
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Abstract
The invention provides a detection method of a physical downlink control channel (PDCCH) of a relay node (RN) and an apparatus thereof. The method comprises the following steps that: an RN monitors a first slot of a set of resource block (RB) pairs and then monitors a second slot of the set of the RB pairs; or, the RN simultaneously detects the first slot and the second slot of the set of the RB pairs, wherein an evolved universal terrestrial radio access network NodeB (eNB) carries out semi-static configuration in advance to configure the set of the RB pairs to the RN by a high level. According to the invention, it is ensured that low complexity is realized when an RN carries out blind detection on a PDCCH, so that whole system efficiency is improved.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of detection method and device of Downlink Control Information of via node.
Background technology
Because following radio communication or cellular system require to increase coverage, support the higher rate transmission, this has proposed new challenge to wireless communication technology.Simultaneously, the cost issues of system building and maintenance is more outstanding.Along with the increase of transmission rate and communication distance, it is outstanding that the energy consumption issues of battery also becomes, and following radio communication will adopt higher frequency, and the pathloss attenuation that causes thus is more serious.In order to increase the coverage of high data rate, group mobility, casual network deployment; Improve the throughput of cell edge; And service is provided for the user in the covering leak of cellular system; Introduced relaying (Relay) technology in the wireless communication system, so relaying technique is regarded as the key technology of 4G.
Long Term Evolution (Long Term Evolution; LTE) system, senior Long Term Evolution (LTE-Advanced; LTE-A) system and senior international mobile communication (International Mobile Telecommunication Advanced; IMT-Advanced) system all be with OFDM (Orthogonal Frequency Division Multiplexing, OFDM) technology be the basis, ofdm system is the data mode of time-frequency bidimensional.1 sub-frame (subframe) is made up of 2 time slots (slot), and normal cyclic prefix (Cyclic Prefix, in the time of CP), each slot is made up of 7 OFDM symbols; During expansion CP, each slot is made up of 6 OFDM symbols.Wherein, (Physical Downlink Control Channel PDCCH) is positioned on preceding 1 or 2 or 3 or 4 OFDM symbol of each subframe down control channel.
In the LTE system, the design of PDCCH is made up of several different parts, and each part all has its particular functionality.Describe for ease, below several terms of explanation and agreement:
1 control information unit (Control Channel Element is called for short CCE): by 36 RE, 9 REG form; The information that comprises among the CCE has: user's descending scheduling authorization message (DL grant) and uplink scheduling authorization information (UL grant); And and system message (System Information, be called for short SI), insert (RandomAccess at random; Be called for short RA) response, the relevant information of paging (Paging).
2.Aggregation the combining form of level L:CCE, promptly PDCCH can only be made up of L CCE, and wherein L ∈ { 1; 2,4,8}; That is to say that PDCCH can only be made up of the combination (representing with 8-CCE) of the combination (representing with 4-CCE) of the combination (representing with 2-CCE) of the combination (representing with 1-CCE) of 1 CCE, 2 CCE, 4 CCE and 8 CCE, and above-mentioned 4 kinds of different combinations corresponding respectively again 4 kinds of different coding speed; The code rate that is 1-CCE is 2/3; The code rate of 2-CCE is 1/3, and the code rate of 4-CCE is 1/6, and the code rate of 8-CCE is 1/12.
3. different CCE aggregation level has the number of its corresponding candidate's control channel, is the maximum times of blind Detecting.For example, under the UE-specific Search Space: candidate's control channel of 1-CCE is 6, and the number of times that promptly carries out blind Detecting by one group of 1 CCE is no more than 6 times; Candidate's control channel of 2-CCE is 6, and the number of times that promptly carries out blind Detecting by one group of 2 CCE is no more than 6 times; Candidate's control channel of 4-CCE is 2, and the number of times that promptly carries out blind Detecting by one group of 4 CCE is no more than 2 times; Candidate's control channel of 8-CCE is 2, and the number of times that promptly carries out blind Detecting by one group of 8 CCE is no more than 2 times.Under the UE-common Search Space, candidate's control channel of 4-CCE is 4, and the number of times that promptly carries out blind Detecting by one group of 4 CCE is no more than 4 times; Candidate's control channel of 8-CCE is 2, and the number of times that promptly carries out blind Detecting by one group of 8 CCE is no more than 2 times.
UE carries out the detailed process of blind Detecting in the LTE system to PDCCH:
At the base station of evolution (eNB) end, (wherein eNB is also referred to as evolved base station, i.e. E-UTRAN NodeB, wherein E-UTRAN is Evolved Universal Terrestrial Radio Access Network, the universal land radio access web of evolution)
The 1st step: chnnel coding is carried out in the control information to the PDCCH of each UE carries respectively;
The 2nd step: the control information that the PDCCH of all UE after will encoding carries is together in series, and carries out scrambling with the sequence of cell-specific;
The 3rd step: (that obtain this moment is the pairing a string CCE of control information that all PDCCH carry, and they are numbered since 0 for Quadrature Phase Shift Keying, QPSK) modulation to carry out the QPSK signal; The down control channel of supposing this moment is made up of 32 CCE altogether, promptly they be numbered CCE 0, CCE 1 ..., CCE 31;
The 4th step: with above-mentioned a string CCE is to be mapped on the RE after the unit interweaves with REG;
The 5th step: (Inverse Fast FourierTransform launches after IFFT) to carry out reverse fast Fourier transform.
At the UE end,
The 1st step: receiving terminal carry out fast Fourier transform (Fast Fourier Transform, FFT) after, and through deinterleaving, obtain a string CCE that has identical numbering with the eNB end.
The 2nd step: UE begins to carry out blind Detecting from being combined as 1-CCE; At first according to oneself sign (Identity; ID), calculation of parameter such as subframe sequence number goes out the original position of 1-CCE, promptly begin to carry out blind Detecting, and then confirm the search volume according to the number of candidate's control channel from being numbered several CCE.For example, the original position of 1-CCE is CCE 5, and then the search volume of UE is { CCE 5, CCE 6, CCE 7, CCE 8, CCE 9, CCE 10}.That is to say that UE will carry out blind Detecting respectively to [CCE 5, CCE 6, CCE 7, CCE 8, CCE 9, CCE 10].
The 3rd step: if when being combined as 1-CCE and carrying out blind Detecting, UE does not detect the UE ID that is complementary with oneself, then begins to carry out blind Detecting from being combined as 2-CCE again.At first still to go out the original position of 2-CCE according to the calculation of parameter such as UE-ID, subframe sequence number of oneself, and then confirm the search volume according to the number of candidate's control channel.For example, the 2-CCE original position is CCE 10, then the search volume of UE be [CCE 10CCE 11], [CCE 12CCE 13] ..., [CCE 20CCE 21].That is to say, UE will to [CCE 10CCE 11], [CCE 12CCE 13] ..., [CCE 20CCE 21] carry out blind Detecting respectively.The rest may be inferred.
The 4th step: if in whole blind detection process, UE does not listen to the UE ID that is complementary with oneself, and explaining does not have one's own control signaling to assign this moment, and then UE switches to sleep pattern; If listened to after the UE ID that is complementary with oneself, UE will go the corresponding business information of demodulation according to the indication of control signaling.
Like the GSM Organization Chart of Fig. 1 for introducing via node RN; Link between base station in this GSM (eNB) and the RN is called repeated link (Backhaul Link; Be also referred to as Un Link), and the user terminal under RN and its coverage (User Equipment, the link between UE) is called access link (Access Link; Be also referred to as Uu Link), the link (Direct Link) that is referred to as to direct transfer of the link between the UE under eNB and its coverage.Concerning eNB, RN just is equivalent to a UE; Concerning UE, RN just is equivalent to eNB.
At present, in adopting band during relaying (inband relay) mode, i.e. Un Link and the identical frequency band of Uu Link use are for fear of the transmitting-receiving interference of RN self, the operation that RN can not send simultaneously and receive on same frequency resource.When RN sends Downlink Control Information for its subordinate UE, just can not receive Downlink Control Information from eNB.Therefore, when downlink transfer, RN sends Downlink Control Information at first on preceding 1 or 2 OFDM symbol, for its subordinate's UE; (the interval gap shown in figure) carries out from being transmitted into the switching of reception in a period of time scope then, after switching is accomplished, on the OFDM symbol of back, receives the data from eNB; Comprising down control channel (Relay Physical Downlink ControlChannel; R-PDCCH) and Physical Downlink Shared Channel (Relay Physical Downlink Shared Channel, R-PDSCH), as shown in Figure 2; The down control channel that to be eNB send to RN is to be carried on Physical Resource Block (Resource Block is on RB).
On descending backhaul subframe, eNB disposes the transmission that one group of RB is used for R-PDCCH through high level semi-staticly, comprising descending scheduling mandate (DL grant) and the uplink scheduling authorization information such as (UL grant) of RN.As shown in Figure 3, under the normal CP, the PDCCH of UE transmits on the individual OFDM symbol of the preceding n (n≤3) of the 1st time slot, and DLgrant is the 4th an OFDM symbol in the original position of the 1st time slot only, and end position is transmitting on totally 4 OFDM symbols of the 7th OFDM symbol; UL grant only transmits on all available OFDM symbols of the 2nd time slot.
The transmission mode of R-PDCCH has that interweave and non-two kinds of interweaving.The R-PDCCH that what is called interweaves (interleavedR-PDCCH) is meant that the back that interweaves of the DL grant with all RN transmits on the available resources of the 1st time slot; The UL grant of all RN transmits on the available resources of the 2nd time slot at the back that interweaves, and has promptly carried the R-PDCCH of a plurality of RN among 1 PRB pair.The so-called non-R-PDCCH that interweaves (non-interleaved R-PDCCH) is meant; ENB is that one or more PRB pair of RN configure dedicated are used to carry R-PDCCH; The DL grant of this RN transmits on the available resources of the 1st time slot; The UL grant of this RN transmits on the available resources of the 2nd time slot, promptly can only carry the R-PDCCH of same RN among 1 PRB pair.
At present, in the research of Relay, the detection method of R-PDCCH is a hot issue in the discussion of 3GPP.Concerning the detection of interleaved R-PDCCH; The detection method with the PDCCH of LTE Rel-8 is prolonged in employing; And concerning the detection of non-interleaved R-PDCCH, present conclusion is that RN monitors the 1st time slot to obtain DL grant, monitors the 2nd time slot to obtain ULgrant; But, solution is not proposed as yet at present to the non-concrete detection method of R-PDCCH down that interweaves.
Summary of the invention
Main purpose of the present invention is to provide a kind of detection method and device of via node RN down control channel, to address the above problem at least.
RN monitors 1st time slot of one group of Resource Block to RB pair earlier, monitors the 2nd time slot of said one group of RB pair again; Perhaps, said RN detects said the 1st time slot and said the 2nd time slot of said one group of RB pair simultaneously, and wherein, said one group of RB pair is the semi-static in advance configuration of said RN by base station eNB through high level.
Further, said RN monitors said the 1st time slot of said one group of RB pair earlier, when not detecting downstream grants DL grant, if said RN judges on said the 1st time slot transfer of data is arranged, and then stops to monitor said the 2nd time slot.
Further, said RN monitors said the 1st time slot of said one group of RB pair earlier, when not detecting DL grant, does not have transfer of data if said RN judges on said the 1st time slot, and then said RN continues to monitor said the 2nd time slot.
Further, after said RN monitors the step of said the 1st time slot and said the 2nd time slot of said one group of RB pair simultaneously, comprise: said RN detects said DL grant and/or said UL grant.
Further, when said RN has the uplink demand, directly monitor said the 2nd time slot.
Further; The step of the said one group of RB of said monitoring comprises: the step of the said one group of RB pair of said monitoring comprises: said RN begins from the 1st the RB pair of said one group of RB pair, according to parameter class set aggregation level L said one group of RB pair is monitored.
Further; Said RN begins from the 1st the RB pair of said one group of RB pair; According to aggregation level L the step that said one group of RB pair monitors is comprised: the R-PDCCH candidate control channel that aggregation level L=1 is corresponding is 6 or 8, and said RN begins from the 1st the RB pair of said one group of RB pair, is one group by 1 RB pair and carries out blind Detecting 6 times or 8 times; Wherein, the search volume size of said RN is 6 or 8 RB pair; The R-PDCCH candidate control channel that aggregationlevel L=2 is corresponding is 8,6,5,4 or 3; Said RN begins from the 1st the RB pair of said one group of RB pair; Carry out blind Detecting 8 times, 6 times, 5 times, 4 times or 3 times by being one group with 2 RB pair; Wherein, the search volume size of said RN is followed successively by 16,12,10,8 or 6 RBpair; The R-PDCCH candidate control channel that aggregation level L=4 is corresponding is 4,3,2 or 1; Said RN begins from the 1st the RB pair of said one group of RB pair; Be one group by 4 RB pair and carry out blind Detecting 4 times, 3 times, 2 times or 1 time; Wherein, the search volume size of said RN is followed successively by 16 or 12 or 8 or 4 RB pair; The R-PDCCH candidate control channel that aggregation level L=8 is corresponding is 2 or 1; Said RN begins from the 1st the RB pair of said one group of RBpair; Be one group by 8 RB pair and carry out blind Detecting 2 times or 1 time; Wherein, the search volume size of said RN is 16 or 8 RB pair.
According to a further aspect in the invention, a kind of monitoring device of via node RN down control channel is provided, has comprised: monitored module, be used for monitoring one group of Resource Block the 1st time slot and the 2nd time slot RB pair; Control module is used to control the 1st time slot that said monitoring module is monitored one group of Resource Block RB pair earlier, monitors the 2nd time slot of said one group of RB pair again; Perhaps, control said the 1st time slot and said the 2nd time slot that said monitoring module detects said one group of RB pair simultaneously, wherein, said one group of RB pair is the semi-static in advance configuration of said RN by base station eNB through high level.
Further, also comprise: detection module is used for when said monitoring module is monitored said one group of RB pair earlier, detecting said DL grant and/or said UL grant; Judge module is used in the testing result of said detection module judging whether transfer of data is arranged on said the 1st time slot for not the time; The judged result that said control module also is used at said judge module is under the situation that is, controls said monitoring module and stops to monitor said the 2nd time slot; Judged result at said judge module is under the situation not, controls said monitoring module and continues to monitor said the 2nd time slot.
Further; It is 6 or 8 that said monitoring module also is used for monitoring the corresponding R-PDCCH candidate control channel of said Resource Block RBpair:aggregation level L=1 according to aggregation level L in the following manner; Said monitoring module begins from the 1st the RB pair of said one group of RB pair; Be one group by 1 RB pair and carry out blind Detecting 6 times or 8 times that wherein, the search volume size of said monitoring module is 6 or 8 RB pair; The R-PDCCH candidate control channel that aggregation level L=2 is corresponding is 8,6,5,4 or 3; Said monitoring module begins from the 1st the RB pair of said one group of RB pair; Carry out blind Detecting 8 times, 6 times, 5 times, 4 times or 3 times by being one group with 2 RB pair; Wherein, the search volume size of said monitoring module is followed successively by 16,12,10,8 or 6 RB pair; The R-PDCCH candidate control channel that aggregationlevel L=4 is corresponding is 4,3,2 or 1; Said monitoring module begins from the 1st the RB pair of said one group of RB pair; Be one group by 4 RB pair and carry out blind Detecting 4 times, 3 times, 2 times or 1 time; Wherein, the search volume size of said monitoring module is followed successively by 16 or 12 or 8 or 4 RB pair; The R-PDCCH candidate control channel that aggregationlevel L=8 is corresponding is 2 or 1; Said monitoring module begins from the 1st the RB pair of said one group of RB pair; Be one group by 8 RB pair and carry out blind Detecting 2 times or 1 time; Wherein, the search volume size of said monitoring module is 16 or 8 RB pair.
The present invention is through a kind of detection method and device of the non-down control channel that interweaves of via node, solved introduce via node in the LTE-A system after, how via node searches for the problem of one's own down control channel.This method can be applicable to via node well, has guaranteed that via node has lower complexity when the blind Detecting down control channel, improved whole system efficient.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the framework behind the fundamental system introducing Relay in the prior art;
Fig. 2 is the frame assumption diagram of descending backhaul subframe in the prior art;
Fig. 3 is prior art R-PDCCH and PDCCH location diagram;
Fig. 4 is the detection method sketch map according to the Downlink Control Information of a kind of via node of the embodiment of the invention one;
Fig. 5 is the detection method sketch map according to the Downlink Control Information of a kind of via node of the embodiment of the invention two;
Fig. 6 is the detection method sketch map according to the Downlink Control Information of a kind of via node of the embodiment of the invention three;
Fig. 7 is the detection method sketch map according to the Downlink Control Information of a kind of via node of the embodiment of the invention four;
Fig. 8 is the checkout gear structural representation according to the Downlink Control Information of a kind of via node of the embodiment of the invention;
Fig. 9 is the checkout gear structural representation according to the Downlink Control Information of the preferred a kind of via node of the embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
According to embodiments of the invention, a kind of detection method of via node RN down control channel is provided, this method comprises:
RN monitors 1st time slot of one group of Resource Block to RB pair earlier, monitors the 2nd time slot of above-mentioned one group of RB pair again; Perhaps, above-mentioned RN detects above-mentioned the 1st time slot and above-mentioned the 2nd time slot of above-mentioned one group of RB pair simultaneously, and wherein, above-mentioned one group of RB pair is the semi-static in advance configuration of above-mentioned RN by base station eNB through high level.
Through this embodiment, make full use of the good channel condition of backhaul link, simplified the complexity that RN detects R-PDCCH widely.This method can be applicable to via node well, has saved overhead, has improved the efficiency of transmission of system.
Above-mentioned RN monitors above-mentioned the 1st time slot of above-mentioned one group of RB pair earlier, when not detecting downstream grants DL grant, if above-mentioned RN judges on above-mentioned the 1st time slot transfer of data is arranged, and then stops to monitor above-mentioned the 2nd time slot.Above-mentioned RN monitors above-mentioned the 1st time slot of above-mentioned one group of RB pair earlier, when not detecting DL grant, does not have transfer of data if above-mentioned RN judges on above-mentioned the 1st time slot, and then above-mentioned RN continues to monitor above-mentioned the 2nd time slot.After above-mentioned RN monitors the step of above-mentioned the 1st time slot and above-mentioned the 2nd time slot of above-mentioned one group of RB pair simultaneously, comprise: above-mentioned RN detects above-mentioned DLgrant and/or above-mentioned UL grant.
When above-mentioned RN has the uplink demand, directly monitor above-mentioned the 2nd time slot.The step of the above-mentioned one group of RB pair of above-mentioned monitoring comprises: above-mentioned RN begins from the 1st the RB pair of above-mentioned one group of RB pair, according to parameter class set aggregationlevel L above-mentioned one group of RB pair is monitored.
Above-mentioned RN begins from the 1st the RB pair of above-mentioned one group of RB pair; According to aggregation level L the step that above-mentioned one group of RB pair monitors is comprised: the R-PDCCH candidate control channel that aggregation level L=1 is corresponding is 6 or 8; Above-mentioned RN begins from the 1st the RB pair of above-mentioned one group of RB pair; Be one group by 1 PRB pair and carry out blind Detecting 6 times or 8 times that wherein, the search volume size of above-mentioned RN is 6 or 8 PRB pair; The R-PDCCH candidate control channel that aggregation level L=2 is corresponding is 8,6,5,4 or 3; Above-mentioned RN begins from the 1st the RB pair of above-mentioned one group of RB pair; Carry out blind Detecting 8 times, 6 times, 5 times, 4 times or 3 times by being one group with 2 RB pair; Wherein, the search volume size of above-mentioned RN is followed successively by 16,12,10,8 or 6 RB pair; The R-PDCCH candidate control channel that aggregation level L=4 is corresponding is 4,3,2 or 1; Above-mentioned RN begins from the 1st the RB pair of above-mentioned one group of RB pair; Be one group by 4 RB pair and carry out blind Detecting 4 times, 3 times, 2 times or 1 time; Wherein, the search volume size of above-mentioned RN is followed successively by 16 or 12 or 8 or 4 RB pair; The R-PDCCH candidate control channel that aggregationlevel L=8 is corresponding is 2 or 1; Above-mentioned RN begins from the 1st the RB pair of above-mentioned one group of RB pair; Be one group by 8 RB pair and carry out blind Detecting 2 times or 1 time; Wherein, the search volume size of above-mentioned RN is 16 or 8 RB pair.
Embodiment one
In the present embodiment, the R-PDCCH of RN does not comprise DLgrant, and judges on the 1st time slot transfer of data is arranged.ENB is the semi-static in advance configuration of RN through high level 12 RB pair are used to carry R-PDCCH, is numbered RB pair0, RBpair1 ..., RB pair11.These 12 RB pair logically are continuous, but physically can be continuous also can dispersing, and Fig. 4 is the detection method sketch map according to the Downlink Control Information of a kind of via node of the embodiment of the invention 1, and is as shown in Figure 4:
1) RN at first detects the 1st time slot of above-mentioned 12 RB pair:
Begin from aggregation level L=1; RN begins to detect for one group by 1 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 8, promptly detects altogether 8 times; At this moment, the search volume size is 8 RB pair.
If RN does not detect the DL grant that is complementary with himself RN ID; Then continue to begin to detect from aggregation level L=2; RN begins to detect for one group by 2 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 6, promptly detects altogether 6 times; At this moment, the search volume size is 12 RB pair.
If RN does not detect the DL grant that is complementary with himself RN ID; Then continue to begin to detect from aggregation level L=4; RN begins to detect for one group by 4 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 3, promptly detects altogether 3 times; At this moment, the search volume size is 12 RB pair.
If RN does not detect the DL grant that is complementary with himself RN ID yet; Then continue to begin to detect from aggregation level L=8; RN begins to detect for one group by 8 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 1, promptly detects altogether 1 time; At this moment, the search volume size is 8 RB pair.
Pass through present embodiment; In the testing process of above-mentioned any RB pair combining form; RN does not all detect corresponding D L grant; And judge on the 1st time slot that in testing process transfer of data is arranged, and therefore explain on the 2nd time slot just can not again uplink authorization have been arranged, then RN no longer continues to detect the 2nd time slot of said one group of RB pair.The detection method of the non-down control channel that interweaves of this via node, solved in the LTE-A system introduce via node after, how via node searches for the problem of one's own down control channel.This method can be applicable to via node well.RN no longer continues to detect the 2nd time slot of said one group of RB pair, has guaranteed that via node has lower complexity when the blind Detecting down control channel, improved whole system efficient.
Embodiment two
In the present embodiment, the R-PDCCH of RN does not comprise DL grant, and judges on the 1st time slot and do not have transfer of data.ENB is the semi-static in advance configuration of RN through high level 10 RB pair are used to carry R-PDCCH, is numbered RB pair0, RB pair1 ..., RB pair9.These 10 RB pair logically are continuous, but physically can be continuous also can dispersing, and Fig. 5 is the detection method sketch map according to the Downlink Control Information of a kind of via node of the embodiment of the invention two, and is as shown in Figure 5:
1) RN at first detects the 1st time slot of above-mentioned 10 RB pair:
RN begins to detect from aggregation level L=1; RN begins to detect for one group by 1 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 6, promptly detects altogether 6 times; At this moment, the search volume size is 6 RB pair.
If RN does not detect the DL grant that is complementary with himself RN ID; Then continue to begin to detect from aggregation level L=2; RN begins to detect for one group by 2 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 5, promptly detects altogether 5 times; At this moment, the search volume size is 10 RB pair.
If RN does not detect the DL grant that is complementary with himself RN ID; Then continue to begin to detect from aggregation level L=4, RN begins to detect for one group by 4 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 2; Promptly detect for one group by 4 RB pair; Detect altogether 2 times, at this moment, the search volume size is 8 RB pair.
If RN does not detect the DL grant that is complementary with himself RN ID yet; Then continue to begin to detect from aggregation level L=8; RN begins to detect for one group by 8 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 1, promptly detects altogether 1 time; At this moment, the search volume size is 8 RB pair.
In the testing process of above-mentioned any RB pair combining form; RN does not all detect corresponding D L grant; And in testing process, judge on the 1st time slot there is not transfer of data; Explain that the 1st time slot put emptyly, therefore go up on the 2nd time slot and possibly have UL grant and transmit that the 2nd time slot that RN also will continue to detect said one group of RB pair again is to obtain ULgrant.
2) RN is according to aggregation level L={1, and 2,4,8} detects the 2nd time slot of above-mentioned 10 RB pair, detection method is with 1).
If in the testing process of above-mentioned any RB pair combining form, in case when detecting corresponding UL grant, then RN stops to detect.If in the testing process of above-mentioned any RB pair combining form, all do not detect corresponding UL grant, then explaining on this descending backhaul subframe had not both had the uplink authorization of RN not have downstream grants yet.
The detection method of the non-down control channel that interweaves of a kind of via node of present embodiment; Earlier the 1st time slot detected; Under the situation that does not have transfer of data on the 1st time slot of judgement, the 2nd time slot detected; Guaranteed that via node has lower complexity when the blind Detecting down control channel, improved whole system efficient.
Embodiment three
In the present embodiment, RN monitors the 1st time slot and the 2nd time slot of said one group of RB pair simultaneously.ENB is the semi-static in advance configuration of RN through high level 8 RB pair are used to carry R-PDCCH, is numbered RB pair0, RB pair1 ..., RB pair7.These 8 RB pair logically are continuous, but physically can be continuous also can dispersing, and Fig. 6 is as shown in Figure 6 according to the detection method sketch map of the Downlink Control Information of a kind of via node of the embodiment of the invention three:
RN detects the 1st time slot and the 2nd time slot of above-mentioned 8 RB pair simultaneously, adopts identical detection method:
Begin from aggregation level L=1; RN begins to detect for one group by 1 RB pair from the 1st the RB pair of said one group of RB pair; Corresponding R-PDCCH candidate control channel is 6; Be that DL grant and UL grant respectively detect 6 times, at this moment, the search volume size of DL grant and UL grant is 6 RB pair.
If RN does not detect DLgrant or the ULgrant that is complementary with himself RN ID; Then continue to begin to detect from aggregationlevel L=2; RN begins to detect for one group by 2 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 4, and promptly DL grant and UL grant respectively detect 4 times; At this moment, the search volume size of DL grant and UL grant is 8 RB pair.
If RN does not detect DLgrant or the ULgrant that is complementary with himself RN ID; Then continue to begin to detect from aggregationlevel L=4, RN begins to detect for one group by 4 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 1; Promptly detect for one group by 2 RB pair; DL grant and UL grant respectively detect 2 times, and at this moment, the search volume size of DL grant and UL grant is 8 RB pair.
If RN does not detect DLgrant or the ULgrant that is complementary with himself RN ID yet; Then continue to begin to detect from aggregationlevel L=8, RN begins to detect for one group by 8 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 1; Promptly detect for one group by 8 RB pair; Detect altogether 1 time, at this moment, the search volume size is 8 RB pair.
If in the testing process of above-mentioned any RB pair combining form, when detecting corresponding D L grant or UL grant, then RN stops to detect.If in the testing process of above-mentioned any RB pair combining form, when RN does not detect corresponding D L grant or UL grant, the downstream grants or the uplink authorization that do not have RN on this descending backhaul subframe are described then.
The detection method of the non-down control channel that interweaves of a kind of via node of present embodiment; In testing process; When detecting corresponding D L grant or UL grant, then RN stops to detect, and this method can be applicable to via node well; Guaranteed that via node has lower complexity when the blind Detecting down control channel, improved whole system efficient.
Embodiment four
In the present embodiment, RN preferentially detects UL grant on the 2nd time slot of one or more RB pair that DLgrant belongs to after having detected DLgrant on the 1st time slot of said one group of RB pair.
ENB is the semi-static in advance configuration of RN through high level 15 RB pair are used to carry R-PDCCH, is numbered RBpair0, RB pair1 ..., RB pair14.These 15 RB pair logically are continuous, but physically can be continuous also can dispersing, and Fig. 7 is the detection method sketch map according to the Downlink Control Information of a kind of via node of the embodiment of the invention four, and is as shown in Figure 7:
1) RN at first detects the 1st time slot of above-mentioned 16 RB pair:
RN begins to detect from aggregation level L=1; RN begins to detect for one group by 1 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 8, promptly detects altogether 8 times; At this moment, the search volume size is 8 RB pair.
If RN does not detect the DL grant that is complementary with himself RN ID; Then continue to begin to detect from aggregation level L=2; RN begins to detect for one group by 2 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 8, promptly detects altogether 8 times; At this moment, the search volume size is 16 RB pair.
If RN does not detect the DL grant that is complementary with himself RN ID; Then continue to begin to detect from aggregation level L=4; RN begins to detect for one group by 4 RB pair from the 1st the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 4, promptly detects altogether 4 times; At this moment, the search volume size is 16 RB pair.
If RN does not detect the DL grant that is complementary with himself RN ID yet; Then continue to begin to detect from aggregation level L=8; RN begins to detect for one group by 8 RB pair from the 3rd the RB pair of said one group of RB pair, and corresponding R-PDCCH candidate control channel is 2, promptly detects altogether 2 times; At this moment, the search volume size is 16 RB pair.
If in the testing process of the combining form of above-mentioned aggregation level L=4, RN detects corresponding D L grant and is carried on RB pair4, RB pair5 is on the 1st time slot of RB pair6 and RB pair7.
2) after RN detects DLgrant, preferentially to RB pair4, RB pair5, the 2nd time slot of RB pair6 and RB pair7 detects:
Begin from RB pair5, earlier according to aggregation level L=1 respectively to RB pair4, RB pair5, the 2nd time slot of RB pair6 and RB pair7 detects, and detects altogether 4 times.If RN does not detect the UL grant that is complementary with himself RN ID, then continue according to aggregation level L=2 respectively to { RB pair4, RB pair5} is with { RB pair6, the 2nd time slot of RBpair7} detects, and detects altogether 2 times.If do not detect the ULgrant that is complementary with RN self RN ID yet, then continue according to aggregation level L=4 respectively to RB pair4, RB pair5, RB pair6, the 2nd time slot of RB pair7} detects, and detects altogether 1 time.
In above-mentioned testing process, in case when detecting corresponding UL grant, then RN stops to detect immediately.
If in above-mentioned testing process, RN does not still detect UL grant, then RN again to the 2nd time slot of above-mentioned 16 RB pair according to aggregation level L={1,2,4,8} detects again, detection method is with 1).
The detection method of the non-down control channel that interweaves of a kind of via node of the embodiment of the invention; When detecting corresponding ULgrant; Then RN stops to detect immediately; This method can be applicable to via node well, has guaranteed that via node has lower complexity when the blind Detecting down control channel, improved whole system efficient.
Embodiment five
RN is on a certain up backhaul subframe; Send the request of uplink to eNB after, on ensuing several descending backhaul subframes, RN will preferentially monitor the 2nd time slot of said one group of RB pair; Up to detecting UL grant, begin to carry out transmitting uplink data.Wherein detection method as previously mentioned.
According to embodiments of the invention, a kind of monitoring device of via node RN down control channel is provided also.Fig. 8 is the checkout gear structural representation according to the Downlink Control Information of a kind of via node of the embodiment of the invention, and is as shown in Figure 8, and this device comprises: monitor module 2, control module 4.Monitor module 2, be used for monitoring one group of Resource Block the 1st time slot and the 2nd time slot RB pair; Control module 4 is used to control and monitors the 1st time slot that module 2 is monitored one group of Resource Block RB pair earlier, monitors the 2nd time slot of one group of RB pair again; Perhaps, the 1st time slot and the 2nd time slot that module 2 detects one group of RB pair simultaneously monitored in control, and wherein, one group of RB pair is the semi-static in advance configuration of RN by base station eNB through high level.
The device that present embodiment provides is monitored module 4 through control module 2 controls and is monitored, and can be applicable to via node well, has guaranteed that via node has lower complexity when the blind Detecting down control channel, improved whole system efficient.
Preferably; The monitoring device that the invention provides a kind of via node RN down control channel further comprises: detection module 6 and judge module 8, Fig. 9 is the checkout gear structural representation according to the Downlink Control Information of the preferred a kind of via node of the embodiment of the invention.Below in conjunction with Fig. 9 said apparatus is described in detail.
Monitor module 2, be used for monitoring one group of Resource Block the 1st time slot and the 2nd time slot RB pair; Control module 4 is connected to monitors module 2, is used to control the 1st time slot that said monitoring module 2 is monitored one group of Resource Block RB pair earlier, monitors the 2nd time slot of said one group of RB pair again; Perhaps, control said the 1st time slot and said the 2nd time slot that said monitoring module 2 detects said one group of RB pair simultaneously, wherein, said one group of RB pair is the semi-static in advance configuration of said RN by base station eNB through high level; Detection module 6 is connected to control module 4, is used for when said monitoring module 2 is monitored said the 1st time slot of said one group of RBpair earlier, detecting downstream grants DL grant; Judge module 8 is used in the testing result of said detection module 6 judging whether transfer of data is arranged on said the 1st time slot for not the time; The judged result that said control module 4 also is used at said judge module 8 is under the situation that is, controls said monitoring module 2 and stops to monitor said the 2nd time slot; Judged result at said judge module 8 is under the situation not, controls said monitoring module 2 and continues to monitor said the 2nd time slot.
The R-PDCCH candidate control channel that aggregation level L=1 is corresponding is 6 or 8; Said monitoring module 2 begins from the 1st the RB pair of said one group of RB pair; Be one group by 1 RB pair and carry out blind Detecting 6 times or 8 times; Wherein, the search volume size of said monitoring module 2 is 6 or 8 RB pair;
The R-PDCCH candidate control channel that aggregation level L=2 is corresponding is 8,6,5,4 or 3; Said monitoring module 2 begins from the 1st the RB pair of said one group of RB pair; Carry out blind Detecting 8 times, 6 times, 5 times, 4 times or 3 times by being one group with 2 RB pair; Wherein, the search volume size of said monitoring module 2 is followed successively by 16,12,10,8 or 6 RB pair;
The R-PDCCH candidate control channel that aggregation L=4 is corresponding is 4,3,2 or 1; Said monitoring module 2 begins from the 1st the RB pair of said one group of RB pair; Be one group by 4 RB pair and carry out blind Detecting 4 times, 3 times, 2 times or 1 time; Wherein, the search volume size of said monitoring module 2 is followed successively by 16 or 12 or 8 or 4 RB;
The R-PDCCH candidate control channel that aggregation L=8 is corresponding is 2 or 1; Said monitoring module 2 begins from the 1st the RB pair of said one group of RB pair; Be one group by 8 RB pair and carry out blind Detecting 2 times or 1 time; Wherein, the search volume size of said monitoring module 2 is 16 or 8 RB pair.
Through embodiment the implementation procedure of the monitoring device of this via node RN down control channel is described in detail below.At first confirmed to monitor the mode that module 2 is monitored time slot among one group of Resource Block RB pair by control module 4, said mode comprises the 1st time slot monitoring one group of Resource Block RB pair earlier, monitors the 2nd time slot of said one group of RB pair again; Perhaps monitor the 1st time slot and the 2nd time slot simultaneously; Secondly; Accomplish the monitoring of time slot among the said Resource Block RB pair according to said listening mode by monitoring module 2; Suppose that the listening mode of confirming is first time slot, second time slot in the monitor resource piece again in the first monitor resource piece; Concrete monitoring step is: said monitoring module 2 is monitored said Resource Block RB pair according to aggregation level L; The R-PDCCH candidate control channel that aggregationlevel L=1 is corresponding is 6 or 8, and said monitoring module 2 begins from the 1st the RB pair of said one group of RB, is one group by 1 RB pair and carries out blind Detecting 6 times or 8 times; Wherein, the search volume size of said monitoring module 2 is 6 or 8 RB pair; The R-PDCCH candidate control channel that aggregation level L=2 is corresponding is 8,6,5,4 or 3; Said monitoring module 2 begins from the 1st the RB pair of said one group of RB; Carry out blind Detecting 8 times, 6 times, 5 times, 4 times or 3 times by being one group with 2 RB pair; Wherein, the search volume size of said monitoring module 2 is followed successively by 16,12,10,8 or 6 RB pair; The R-PDCCH candidate control channel that aggregation L=4 is corresponding is 4,3,2 or 1; Said monitoring module 2 begins from the 1st the RB pair of said one group of RB pair; Be one group by 4 RB pair and carry out blind Detecting 4 times, 3 times, 2 times or 1 time; Wherein, the search volume size of said monitoring module 2 is followed successively by 16 or 12 or 8 or 4 RB pair; The R-PDCCH candidate control channel that aggregation L=8 is corresponding is 2 or 1; Said monitoring module 2 begins from the 1st RBpair of said one group of RB pair; Be one group by 8 RB pair and carry out blind Detecting 2 times or 1 time; Wherein, the search volume size of said monitoring module 2 is 16 or 8 RB pair.All detect said DL grant and/or said UL grant during each the monitoring by detection module 6; In above-mentioned snoop procedure; In case detecting, judge module 8 judges when the DL grant that does not have coupling on said the 1st time slot still has transfer of data; Then the said monitoring module 2 of control module 4 control stops said RB pair is continued to monitor, if when neither existing DL grant also not have other data, then the said monitoring module 2 of control module 4 controls continues to monitor second time slot of said RB pair.
The checkout gear of the non-down control channel that interweaves of a kind of via node through the embodiment of the invention, solved introduce via node in the LTE-A system after, how via node searches for the problem of one's own down control channel.This device can be applicable to via node well, has guaranteed that via node has lower complexity when the blind Detecting down control channel, improved whole system efficient.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the detection method of a via node RN down control channel is characterized in that,
RN monitors 1st time slot of one group of Resource Block to RB pair earlier, monitors the 2nd time slot of said one group of RB pair again; Perhaps,
Said RN detects said the 1st time slot and said the 2nd time slot of said one group of RB pair simultaneously, and wherein, said one group of RB pair is the semi-static in advance configuration of said RN by base station eNB through high level.
2. the method for claim 1; It is characterized in that said RN monitors said the 1st time slot of said one group of RB pair earlier, when not detecting downstream grants DL grant; If said RN judges on said the 1st time slot transfer of data is arranged, then stop to monitor said the 2nd time slot.
3. the method for claim 1; It is characterized in that said RN monitors said the 1st time slot of said one group of RB pair earlier, when not detecting DL grant; Do not have transfer of data if said RN judges on said the 1st time slot, then said RN continues to monitor said the 2nd time slot.
4. the method for claim 1 is characterized in that, after said RN monitors the step of said the 1st time slot and said the 2nd time slot of said one group of RB pair simultaneously, comprises:
Said RN detects said DL grant and/or said UL grant.
5. like each described method in the claim 1 to 4, it is characterized in that, when said RN has the uplink demand, directly monitor said the 2nd time slot.
6. like each described method in the claim 1 to 4; It is characterized in that; The step of the said one group of RB pair of said monitoring comprises: said RN begins from the 1st the RB pair of said one group of RB pair, according to parameter class set aggregationlevel L said one group of RB pair is monitored.
7. method as claimed in claim 6 is characterized in that, said RN begins from the 1st the RB pair of said one group of RB pair, according to aggregation level L the step that said one group of RB pair monitors is comprised:
The R-PDCCH candidate control channel that aggregation level L=1 is corresponding is 6 or 8; Said RN begins from the 1st the RB pair of said one group of RB pair; Be one group by 1 RB pair and carry out blind Detecting 6 times or 8 times; Wherein, the search volume size of said RN is 6 or 8 RB pair;
The R-PDCCH candidate control channel that aggregation level L=2 is corresponding is 8,6,5,4 or 3; Said RN begins from the 1st the RB pair of said one group of RB pair; Carry out blind Detecting 8 times, 6 times, 5 times, 4 times or 3 times by being one group with 2 RB pair; Wherein, the search volume size of said RN is followed successively by 16,12,10,8 or 6 RB pair;
The R-PDCCH candidate control channel that aggregation level L=4 is corresponding is 4,3,2 or 1; Said RN begins from the 1st the RB pair of said one group of RB pair; Be one group by 4 RB pair and carry out blind Detecting 4 times, 3 times, 2 times or 1 time; Wherein, the search volume size of said RN is followed successively by 16 or 12 or 8 or 4 RB pair;
The R-PDCCH candidate control channel that aggregation level L=8 is corresponding is 2 or 1; Said RN begins from the 1st the RB pair of said one group of RB pair; Be one group by 8 RB pair and carry out blind Detecting 2 times or 1 time; Wherein, the search volume size of said RN is 16 or 8 RB pair.
8. the checkout gear of a RN down control channel is characterized in that, comprising:
Monitor module, be used for monitoring one group of Resource Block the 1st time slot and the 2nd time slot RB pair;
Control module is used to control the 1st time slot that said monitoring module is monitored one group of Resource Block RB pair earlier, monitors the 2nd time slot of said one group of RB pair again; Perhaps, control said the 1st time slot and said the 2nd time slot that said monitoring module detects said one group of RB pair simultaneously, wherein, said one group of RB pair is the semi-static in advance configuration of said RN by base station eNB through high level.
9. device as claimed in claim 8 is characterized in that,
Also comprise: detection module is used for when said monitoring module is monitored said one group of RB pair earlier, detecting said DLgrant and/or said UL grant; Judge module is used in the testing result of said detection module judging whether transfer of data is arranged on said the 1st time slot for not the time;
The judged result that said control module also is used at said judge module is under the situation that is, controls said monitoring module and stops to monitor said the 2nd time slot; Judged result at said judge module is under the situation not, controls said monitoring module and continues to monitor said the 2nd time slot.
10. device as claimed in claim 8 is characterized in that, said monitoring module also is used for monitoring said Resource Block RB pair according to aggregation level L in the following manner:
The R-PDCCH candidate control channel that aggregation level L=1 is corresponding is 6 or 8; Said monitoring module begins from the 1st the RB pair of said one group of RB pair; Be one group by 1 RB pair and carry out blind Detecting 6 times or 8 times; Wherein, the search volume size of said monitoring module is 6 or 8 RB pair;
The R-PDCCH candidate control channel that aggregation level L=2 is corresponding is 8,6,5,4 or 3; Said monitoring module begins from the 1st the RB pair of said one group of RB pair; Carry out blind Detecting 8 times, 6 times, 5 times, 4 times or 3 times by being one group with 2 RB pair; Wherein, the search volume size of said monitoring module is followed successively by 16,12,10,8 or 6 RB pair;
The R-PDCCH candidate control channel that aggregation L=4 is corresponding is 4,3,2 or 1; Said monitoring module begins from the 1st the RB pair of said one group of RB pair; Be one group by 4 RB pair and carry out blind Detecting 4 times, 3 times, 2 times or 1 time; Wherein, the search volume size of said monitoring module is followed successively by 16 or 12 or 8 or 4 RB pair;
The R-PDCCH candidate control channel that aggregation L=8 is corresponding is 2 or 1; Said monitoring module begins from the 1st the RB pair of said one group of RB pair; Be one group by 8 RB pair and carry out blind Detecting 2 times or 1 time; Wherein, the search volume size of said monitoring module is 16 or 8 RB pair.
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| PCT/CN2011/081766 WO2012062179A1 (en) | 2010-11-10 | 2011-11-03 | Method and apparatus for detecting downlink control channel of relay node |
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