CN102843748A - Method and device for determining search spaces - Google Patents
Method and device for determining search spaces Download PDFInfo
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- CN102843748A CN102843748A CN2011101691499A CN201110169149A CN102843748A CN 102843748 A CN102843748 A CN 102843748A CN 2011101691499 A CN2011101691499 A CN 2011101691499A CN 201110169149 A CN201110169149 A CN 201110169149A CN 102843748 A CN102843748 A CN 102843748A
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- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
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Abstract
The invention discloses a method and a device for determining search spaces. The method comprises the following steps: obtaining the number of candidate control channels and the corresponding initial positions according to the polymerization degree, determining the search spaces corresponding to different polymerization degrees; blind detecting a downlink control channel in the search space corresponding to different polymerization degrees; wherein, when L or lambda is equal to 16, the number of the corresponding candidate control channels is 1 or 2, when L or lambda is equal to 32, the number of the corresponding candidate control channels is 1; and the initial position of the search space corresponding to different L and lambda is stationary, or, semi-statically informing by a high layer signaling. According to the method and the device, the problem that the mobile relay how to search the downlink control channel in a high-speed moving scene is solved. The method and the device are applied to the mobile relay (or higher-version terminal) well, simplify the detection complexity of in-band/out-band relay node to the downlink control channel, are applied to the relay node well, save the system cost, and increase the transmission efficiency of the system.
Description
Technical field
The present invention relates to, relate in particular to a kind of method and device of search volume of the down control channel that confirm to move relaying.
Background technology
Long Term Evolution (LTE; Long Term Evolution) system, senior Long Term Evolution (LTE-A; LTE-Advanced) system and senior international mobile communication (IMT-Advanced; International Mobile Telecommunication Advanced) system is the basis with OFDM (OFDM, Orthogonal Frequency Division Multiplexing) technology all; And ofdm system is the data mode of time-frequency bidimensional; 1 sub-frame (subframe) is made up of 2 time slots (slot); Normal cyclic prefix (Normal CP; Normal Cyclic Prefix) time, when each slot formed expansion CP (Extended CP) by 7 OFDM symbols, each slot was made up of 6 OFDM symbols.Wherein, Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) is positioned on preceding 1 or 2 or 3 or 4 OFDM symbol of the 1st time slot of each subframe.
In the LTE system, the design of PDCCH is made up of several different parts, describes the several terms of explained later for ease:
Resource Unit (RE, Resource Element): minimum time occupies 1 number of sub-carrier on 1 OFDM symbol;
Resource unit group (REG, Resource Element Group): according to the difference of reference symbol position on each OFDM symbol, 1 REG can be made up of 4 or 6 RE;
Control information unit (CCE, Control Channel Element): 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 (SI, System Information), insert (RA at random; RandomA ccess) response, the relevant information of paging (Paging);
Physical Resource Block (PRB, Physical Resource Block): being continuous 1 time slot on the time-domain, is continuous 12 number of sub-carrier on the frequency domain;
Physical Resource Block is to (PRB pair): being continuous 1 sub-frame on the time-domain, is continuous 12 number of sub-carrier on the frequency domain;
Virtual resource blocks (VRB, Virtual Resource Block): notion in logic, size is the same with PRB.According to the difference of VRB, can divide two types again, i.e. continous way VRB and discrete type VRB to the mapping mode of PRB.In like manner, VRB pair is also identical with PRB pair size;
The combining form of the degree of polymerization (Aggregation level) L:CCE, PDCCH is made up of L CCE, and L ∈ { 1; 2,4,8}; Be that PDCCH can only be made up 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 the combination (representing with 8-CCE) of 8 CCE; And 4 kinds of different coding speed that above-mentioned 4 kinds of different combinations are corresponding respectively again, promptly the code rate of 1-CCE is 2/3, the code rate of 2-CCE is 1/3; The code rate of 4-CCE is 1/6, and the code rate of 8-CCE is 1/12;
Search volume (SS, Search Space): be made up of some groups of candidate's control channels (PDCCH candidate), UE monitors the search volume, and in the search volume, carries out blind Detecting, so that detect and own relevant down control channel.Two type of search spaces are arranged: a kind of is common search space (UE-common Search Space); The i.e. search volume that all will monitor of all UE; What carry on it is and system information (SI; System information), insert (RA, Random Access) response and the relevant public information of paging (Paging) at random; Another kind is the special-purpose search volume (UE-specific Search Space) of UE, and what wherein carry is the up-downgoing scheduling authorization information of UE self;
Candidate's control channel (PDCCH candidate): different CCE aggregation level L all corresponding PDCCH candidate number, the i.e. maximum times of blind Detecting.For example, in the dedicated search space of UE: totally 6 of the PDCCH candidate of 1-CCE (L=1) promptly are no more than 6 times by the number of times that one group of 1 CCE carries out blind Detecting; Totally 6 of the PDCCH candidate of 2-CCE (L=2) promptly are no more than 6 times by the number of times that one group of 2 CCE carry out blind Detecting; Totally 2 of the PDCCH candidate of 4-CCE (L=4) promptly are no more than 2 times by the number of times that one group of 4 CCE carry out blind Detecting; Totally 2 of the PDCCH candidate of 8-CCE (L=8) promptly are no more than 2 times by the number of times that one group of 8 CCE carry out blind Detecting.In the common search space of UE: totally 4 of the PDCCH candidate of 4-CCE promptly are no more than 4 times by the number of times that one group of 4 CCE carry out blind Detecting; Totally 2 of the PDCCH candidate of 8-CCE promptly are no more than 2 times by the number of times that one group of 8 CCE carry out blind Detecting;
The original position of search volume: the original position in common search space is always CCE0; The original position in UE dedicated search space is that the calculation of parameter such as number of subframe sequence number and candidate's control channel obtain according to UE sign (UE-ID, UE Identity), the sum of CCE, L value.
UE comprises the process that PDCCH carries out blind Detecting in the LTE system:
(wherein eNB is also referred to as evolved base station in the base station end of evolution; Be universal land radio access web node (the E-UTRAN NodeB of evolution; Wherein E-UTRAN is the abbreviation of Evolved Universal Terrestrial Radio Access Network)), comprising:
Chnnel coding is carried out in control information to the PDCCH of each UE carries respectively;
The control information that the PDCCH of all UE behind the coding is carried is together in series, and carries out scrambling with the sequence of cell-specific;
Carry out QPSK signal (QPSK, Quadrature Phase Shift Keying) modulation, that obtain this moment is the pairing a string CCE of control information that all PDCCH carry, and they are numbered since 0; 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;
With above-mentioned a string CCE is after the unit interweaves, to be mapped on the RE according to specific mapping ruler with REG;
Carry out launching after the reverse fast Fourier transform (IFFT, Inverse Fast Fourier Transform).At the UE end, comprising:
Receiving terminal carries out fast Fourier transform (FFT, Fast Fourier Transform), and through after the deinterleaving, obtains a string CCE that has identical numbering with the eNB end;
UE begins to carry out blind Detecting from being combined as 1-CCE; At first calculation of parameter such as the UE ID of basis oneself, subframe sequence number go out the original position of 1-CCE; Promptly begin to carry out blind Detecting, and then confirm concrete search volume according to the number of PDCCH candidate from initial CCE.For example, the original position of 1-CCE is CCE5, 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];
If when being combined as 1-CCE and carrying out blind Detecting, UE does not detect the PDCCH that is complementary with oneself UE ID, 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 PDCCH candidate.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;
If in whole blind detection process, UE does not listen to the PDCCH that is complementary with own UE ID, and explaining does not have one's own descending control signaling to assign at this moment, and then UE will abandon PDCCH; If listened to the PDCCH that is complementary with oneself UE ID, UE will go to receive or send the corresponding business data according to the indication of descending control signaling.
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.
Introducing via node (RN; Relay Node) in the GSM, the link between base station (eNB) and the RN is called repeated link (Backhaul Link is also referred to as Un Link); User terminal (UE under RN and its coverage; User Equipment) link between is called access link (Access Link is 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.
Via node can be divided into two types, i.e. via node and the outer via node of band in the band.
As far as being with interior via node (in-band RN), Un Link uses identical frequency band with Uu Link, and is as shown in Figure 1, Un Link and the equal frequency of utilization f of Uu Link
1The operation that RN can not send simultaneously and receive is disturbed in transmitting-receiving for fear of RN self 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; (interval gap as shown in Figure 2) carries out from being transmitted into the switching of reception in a period of time scope then; After switching completion, on the OFDM symbol of back, receive data, comprising the down control channel (R-PDCCH of relaying itself from eNB; Relay Physical Downlink Control Channel) and Physical Downlink Shared Channel (PDSCH; Physical Downlink Shared Channel), as shown in Figure 2, promptly the R-PDCCH that sends to RN of eNB is carried on Physical Resource Block or Physical Resource Block to last.
As far as being with outer via node (out-band RN), Un Link and Uu Link take diverse two frequency ranges, and be as shown in Figure 3, Un Link frequency of utilization f
1, Uu Link frequency of utilization f
2Therefore, the outer RN of band can be at f
1In the time of last transmission (reception) at f
2Last reception (transmission) can not produce interference between sending and receiving each other.Therefore, the outer via node of band can As-received stand in the information of sending on any OFDM symbol of every subframe.
R-PDCCH can interweave in transmission course and also can not interweave.Wherein,
The R-PDCCH that what is called interweaves (with cross-interleaving) is meant, is carried on the available resources of the 1st time slot after the DL grant of all RN in the sub-frame is interweaved; Be carried on the available resources of the 2nd time slot after the UL grant of all RN in one sub-frame is interweaved, promptly carried the R-PDCCH of a plurality of RN among 1 RB pair.
The so-called non-R-PDCCH that interweaves (without cross-interleaving) is meant; ENB utilizes high-level signaling to be used to carry R-PDCCH for the semi-static one group of special-purpose VRB pair of configuration of different RN; Wherein, the DL grant of RN transmits on the available resources of the 1st time slot, and the UL grant of RN transmits on the available resources of the 2nd time slot; Promptly can only carry the R-PDCCH of same RN among 1 VRB pair, and can not be shared by a plurality of RN.
Definite method of the search volume of R-PDCCH is prolonged definite method of having used search volume in the above-mentioned UE blind detection process basically in the LTE-A system.Wherein, main difference is:
RN does not have the common search space, has only the dedicated search space.
The search volume of the non-R-PDCCH of interweaving: R-PDCCH is made up of Λ VRB pair, wherein Λ ∈ 1,2,4,8}, respectively the number of corresponding R-PDCCH candidate be 6,6,2,2}, and the original position in different Λ corresponding search spaces is VRB0.
In 3GPP discusses, move relaying (MR, Mobile Relay) and be about to become a hot issue.Because high-speed mobile has produced bigger Doppler frequency deviation, and ofdm system very easily receives the influence of frequency deviation, promptly a very little frequency deviation all can be destroyed the orthogonality between the subcarrier, thereby causes the user to be difficult to correct reception data.In addition, the increase of Doppler frequency deviation also makes and promptly causes shortening of channel coherence time wireless channel to produce fast and change, seriously influenced the correct reception of data equally.In order to solve the correct reception problem of down control channel; Introduce new downlink control channel format possibly; And the change of the aggregation level L value of R-PDCCH can cause the blind check number of times of original position, size and the mobile relaying of R-PDCCH search volume to change.
Like this, existingly confirm through the UE blind detection process that the method for search volume is not suitable for and move relaying.。
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and device of definite search volume, can realize confirming the search volume of the down control channel that moves relaying under the high-speed mobile scene.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of definite search volume comprises,
According to the number and the corresponding original position thereof of degree of polymerization acquisition candidate control channel, confirm the pairing search volume of different polymerization degree;
Blind Detecting down control channel in the pairing search volume of different polymerization degree;
Wherein, when the down control channel that moves relaying was made up of L=16 CCE, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of L=32 CCE, the number of its pairing candidate's control channel was 1; When the down control channel that moves relaying was made up of VRB pair Λ=16 Physical Resource Block, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of Λ=32 a VRB pair, the number of its pairing candidate's control channel was 1;
And the original position of different L and the pairing search volume of Λ is fixing; Perhaps, by the semi-static notice of high-level signaling.
The value of said L and Λ is respectively: 1 or 2 or 4 or 8 or 16 or 32 combination in any.
For non-situation about interweaving in the band, the original position of the said different pairing search volume of Λ is all identical; Perhaps, have nothing in common with each other; Perhaps, part is identical, and remainder is different;
Said original position is represented with the VRB call number.
Be made up of L CCE for the outer down control channel that moves relaying of band, the original position in said Different L corresponding search space is following:
The base station is fixed as a certain specific CCE call number with the outer original position that moves the search volume of relaying of each band of its subordinate; Perhaps, said initial CCE call number is semi-static variable, and notifies the sum of said initial CCE call number and CCE by high-level signaling;
Said each band is outer to be moved relaying and begins to carry out successively blind Detecting from separately initial CCE call number, and maximum CCE call number is no more than the sum of CCE in the search volume.
Be made up of L CCE for the outer down control channel that moves relaying of band, the original position in said Different L corresponding search space is following:
The base station is moved relaying for each band of its subordinate is outer and is distributed one group of fixing CCE to be used to carry its down control channel respectively;
The outer relaying that moves of said each band is carrying out blind Detecting in the scope of search volume separately, and the original position of the different pairing search volumes of L is the 1st CCE in the search volume scope separately;
Said one group of CCE is change that fix or semi-static and is notified by high-level signaling.
Be made up of L CCE for the outer down control channel that moves relaying of band, the original position in said Different L corresponding search space is following:
The base station is made as fixed value with the outer one group of shared CCE call number of down control channel that moves relaying of each band of its subordinate, and is perhaps semi-static variable, and notified by high-level signaling;
The outer search volume of moving relaying of said each band is above-mentioned preallocated one group of CCE.
When being made up of Λ VRB pair for the outer down control channel that moves relaying of band, the original position of the different pairing search volumes of Λ is all identical; Perhaps, have nothing in common with each other; Perhaps, part is identical, and remainder is different;
Said original position is represented with the VRB call number.
A kind of device of definite search volume comprises at least and confirms unit and detecting unit, wherein,
Confirm the unit, obtain candidate's control channel number and corresponding original position thereof, confirm the pairing search volume of different polymerization degree according to the degree of polymerization, wherein,
When the down control channel that moves relaying was made up of L=16 CCE, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of L=32 CCE, the number of its pairing candidate's control channel was 1;
When the down control channel that moves relaying was made up of Λ=16 a VRB pair, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of Λ=32 a VRB pair, the number of its pairing candidate's control channel was 1;
And the original position of different L and the pairing search volume of Λ is fixing; Perhaps, by the semi-static notice of high-level signaling;
Detecting unit, blind Detecting down control channel in the pairing search volume of different polymerization degree.
The value of said L and Λ is respectively: 1 or 2 or 4 or 8 or 16 or 32 combination in any.
Can find out from the technical scheme that the invention described above provides, comprise the number and the corresponding original position thereof that obtain candidate's control channel according to the degree of polymerization, confirm the pairing search volume of different polymerization degree; Blind Detecting down control channel in the pairing search volume of different polymerization degree; Wherein, when the down control channel that moves relaying was made up of L=16 CCE, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of L=32 CCE, the number of its pairing candidate's control channel was 1; When the down control channel that moves relaying was made up of Λ=16 a VRB pair, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of Λ=32 a VRB pair, the number of its pairing candidate's control channel was 1; And the original position of different L and the pairing search volume of Λ is fixing; Perhaps, by the semi-static notice of high-level signaling.The inventive method has solved under the high-speed mobile scene, and how mobile relaying searches for the problem of the down control channel of oneself.Be applicable to mobile relaying (perhaps more the terminal of highest version) well, simplified widely in the band/band outer via node is to the detection complexity of its down control channel, is applicable to via node well, saved overhead, improved the efficiency of transmission of system.
Description of drawings
Fig. 1 is for having now being with interior via node, the sketch map of the frequency band that Un Link is identical with Uu Link use;
Fig. 2 is the sketch map of existing eNB to the R-PDCCH of RN transmission;
Fig. 3 is for having now being with outer via node, the sketch map of the frequency band that Un Link is different with Uu Link use;
Fig. 4 confirms the flow chart of search volume for the present invention;
Fig. 5 confirms composition structural representations of the device in many spaces for the present invention.
Embodiment
Fig. 4 confirms the flow chart of search volume for the present invention, and is as shown in Figure 4, may further comprise the steps:
Step 400: according to the number of degree of polymerization acquisition candidate control channel, and corresponding original position, confirm the pairing search volume of different polymerization degree; Wherein,
Under situation about interweaving, when the down control channel that moves relaying was made up of L=16 CCE, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of L=32 CCE, the number of its pairing candidate's control channel was 1;
Under non-situation about interweaving, when the down control channel that moves relaying was made up of Λ=16 a VRB pair, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of Λ=32 a VRB pair, the number of its pairing candidate's control channel was 1;
And the original position of different L and the pairing search volume of Λ is fixing; Perhaps, by the semi-static notice of high-level signaling.
Need to prove that the outer down control channel that moves relaying of band can be made up of L CCE, perhaps is made up of Λ VRB pair, wherein, the value of L and Λ can be 1 or 2 or 4 or 8 or 16 or 32 combination in any.When degree of polymerization value is existing 1 or 2 or 4 or 8, confirm the method for number of candidate's control channel and of the prior art in full accord, repeat no more here.
Step 401: blind Detecting down control channel in the pairing search volume of different polymerization degree.
In this step, the original position of different L and the pairing search volume of Λ can be fixed, and also can be the semi-static notice of high-level signaling.Wherein,
For non-situation about interweaving in the band, the original position of the different pairing search volumes of Λ can be all identical; Perhaps have nothing in common with each other; What perhaps have is identical, the difference that has; Said original position is represented with the VRB call number.
For the situation that interweaves in the band, the original position of the different pairing search volumes of L can be not used in qualification protection scope of the present invention referring to the regulation in the existing protocol, no longer details here.
Be made up of L CCE for the outer down control channel that moves relaying of band, the original position in Different L corresponding search space is following:
The base station is fixed as a certain specific CCE call number with the outer original position that moves the search volume of relaying of each band of its subordinate; Perhaps, said initial CCE call number is semi-static variable, and notifies the sum of said initial CCE call number and CCE by high-level signaling.At this moment, each band is outer to be moved relaying and begins to carry out successively blind Detecting from separately initial CCE call number, and maximum CCE call number can not surpass the sum of CCE in the search volume; Perhaps,
The base station is moved relaying for each band of its subordinate is outer and is distributed one group of fixing CCE to be used to carry its down control channel respectively.At this moment, the scope of search volume is limited in said one group of fixing CCE, and the outer relaying that moves of each band is carrying out blind Detecting in the scope of search volume separately, and the original position of the different pairing search volumes of L is the 1st CCE in the search volume scope separately.Said one group of CCE can fix, and can be semi-static change also, and notified by high-level signaling; Perhaps,
The base station is made as fixed value with the outer one group of shared CCE call number of down control channel that moves relaying of each band of its subordinate, and is perhaps semi-static variable, and notified by high-level signaling.At this moment, the outer search volume of moving relaying of each band is exactly above-mentioned preallocated one group of CCE, need not to carry out blind Detecting.
When forming by Λ VRB pair for the outer down control channel that moves relaying of band, the original position in different Λ corresponding search space, in full accord with the non-definite method that interweaves in the band, no longer detail here.
The inventive method simplified in the band widely/and the outer via node of band is to the detection complexity of its down control channel, is applicable to via node well, saved overhead, improved the efficiency of transmission of system.
To the inventive method, a kind of device of definite search volume also is provided, comprise at least and confirm unit and detecting unit, wherein,
Confirm the unit, obtain candidate's control channel number and corresponding original position thereof, confirm the pairing search volume of different polymerization degree according to the degree of polymerization, wherein,
When the down control channel that moves relaying was made up of L=16 CCE, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of L=32 CCE, the number of its pairing candidate's control channel was 1;
When the down control channel that moves relaying was made up of Λ=16 a VRB pair, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of Λ=32 a VRB pair, the number of its pairing candidate's control channel was 1;
And the original position of different L and the pairing search volume of Λ is fixing; Perhaps, by the semi-static notice of high-level signaling.
Detecting unit, blind Detecting down control channel in the pairing search volume of different polymerization degree.
Below in conjunction with embodiment the inventive method is described in detail.
First embodiment, non-interweaving is the identical situation of original position of each search volume in the band.In the present embodiment, suppose to move relaying and belong to relaying in the band, and each R-PDCCH that moves relaying under the covering of same base station is non-interweaving.It is to move 40 VRB pair of the semi-static in advance configuration of relaying to be used to carry R-PDCCH that the base station utilizes high-level signaling, and numbering is respectively VRB0, VRB1 ..., VRB39.These 40 VRB pair logically are continuous, but physically according to the difference of VRB to the mapping mode of PRB, possibly be continuous, also possibly disperse.
Each move the relaying search volume confirm comprise:
If the value of base station configuration Λ be 1,2,4,8,16,32}, then respectively the number of corresponding R-PDCCH candidate be 6 or 8 or 10,6 or 8 or 10,2 or 3 or 4,2 or 3 or 4,1 or 2,1}.
The original position of the different pairing search volumes of Λ is all identical, and for example, the original position of all pairing search volumes of Λ of hypothesis is VRB0 in the present embodiment;
Concrete blind check process is following:
Move relaying from Λ=1 beginning, begin to detect for one group by 1-VRB from VRB0, corresponding R-PDCCH candidate is 6 or 8 or 10, promptly detects altogether 6 or 8 or 10 times;
The search volume is: and VRB0, VRB1 ..., VRB5}, or VRB0, VRB1 ..., VRB7}, or VRB0, VRB1 ..., VRB9}; Corresponding search space size is respectively: 6 or 8 or 10 VRB.
Do not detect the R-PDCCH that is complementary with himself ID if move relaying, then continue to begin to detect for one group by 2-VRB from Λ=2, corresponding R-PDCCH candidate is 6 or 8 or 10, promptly detects altogether 6 or 8 or 10 times;
The search volume is: { { { { VRB 10, VRB11}}, or { { VRB0, VRB1}, { VRB2, VRB3}..., { VRB14, VRB 15}}, or { { VRB0, VRB 1}, { VRB2, VRB3}..., { VRB18, VRB19}} for VRB2, VRB3}... for VRB0, VRB1}; Corresponding search space size is respectively: 12 or 16 or 20 VRB.
Do not detect the R-PDCCH that is complementary with himself ID if move relaying, then continue to begin to detect for one group by 4-VRB from Λ=4, corresponding R-PDCCH candidate is 2 or 3 or 4, promptly detects altogether 2 or 3 or 4 times;
The search volume is: { { VRB0, VRB1, VRB2, VRB3}, { VRB4, VRB5, VRB6, VRB7}}, or { { VRB0; VRB1, VRB2, VRB3}, { VRB4, VRB5, VRB6, VRB7}, { VRB8, VRB9; VRB10, VRB11}}, or { { VRB0, VRB1, VRB2, VRB3}, { VRB4, VRB5, VRB6; VRB7}, { VRB8, VRB9, VRB10, VRB11}, { VRB12, VRB13, VRB14, VRB15}}; Corresponding search space size is respectively: 8 or 12 or 16 VRB.
Do not detect the R-PDCCH that is complementary with himself ID yet if move relaying, then continue to begin to detect for one group by 8-VRB from Λ=8, corresponding R-PDCCH candidate is 2 or 3 or 4, promptly detects altogether 2 or 3 or 4 times;
The search volume is: VRB0, and VRB1 ..., VRB7}, and VRB8, VRB9 ..., VRB15}}, or { { VRB0; VRB1 ..., VRB7}, VRB8, VRB9 ..., VRB15}, { VRB16, VRB17; ..., VRB23}}, or VRB0, VRB1 ..., VRB7}, and VRB8, VRB9 ...; VRB15}, and VRB16, VRB17 ..., VRB23}, and VRB24, VRB25 ..., VRB31}}; Corresponding search space size is respectively: 16 or 24 or 32 VRB.
If MR does not detect the R-PDCCH that is complementary with himself ID yet, then continue to begin to detect for one group by 16-VRB from Λ=16, corresponding R-PDCCH candidate is 1 or 2, promptly detects altogether 1 or 2 time;
The search volume is: and VRB0, VRB1 ..., VRB15}, or VRB0, VRB1 ..., VRB15}, and VRB16, VRB17 ..., VRB31}}; The search volume size is 16 or 32 VRB.
Do not detect the R-PDCCH that is complementary with himself ID yet if move relaying, then continue to begin to detect for one group by 32-VRB from Λ=32, corresponding R-PDCCH candidate is 1, promptly detects altogether 1 time;
The search volume is: and VRB0, VRB1 ..., VRB31}; The search volume size is 32 VRB.
In the testing process of above-mentioned any VRB combining form, in a single day mobile relaying detects the R-PDCCH that is complementary with himself ID just stops to detect.
Second embodiment, non-interweaving is the original position condition of different of each search volume in the band.In the present embodiment, if the value of base station configuration Λ be 4,8,16,32}, then respectively the number of corresponding R-PDCCH candidate be 2,2,1,1}.The original position of the different pairing search volumes of Λ is different, and for example, the original position of Λ=4 pairing search volumes is VRB28; The original position of Λ=8 pairing search volumes is VRB24; The original position of Λ=16 pairing search volumes is VRB16; The original position of Λ=32 pairing search volumes is VRB0;
Concrete blind check process is following:
Move relaying and begin from Λ=4 to detect for one group by 4-VRB, corresponding R-PDCCH candidate is 2, promptly detects altogether 2 times;
The search volume is: { { VRB28, VRB29, VRB30, VRB31}, { VRB32, VRB33, VRB34, VRB35}}; Corresponding search space size is respectively 8 VRB.
Do not detect the R-PDCCH that is complementary with himself ID if move relaying, then continue to begin to detect for one group by 8-VRB from Λ=8, corresponding R-PDCCH candidate is 2, promptly detects altogether 2 times;
The search volume is: VRB24, and VRB25 ..., VRB31}, and VRB32, VRB33 ..., VRB39}}; Corresponding search space size is respectively 16 VRB.
Do not detect the R-PDCCH that is complementary with himself ID yet if move relaying, then continue to begin to detect for one group by 16-VRB from Λ=16, corresponding R-PDCCH candidate is 1, promptly detects altogether 1 time;
The search volume is: and VRB 16, and VRB 17 ..., VRB31}; The search volume size is 16 VRB.
Do not detect the R-PDCCH that is complementary with himself ID yet if move relaying, then continue to begin to detect for one group by 32-VRB from Λ=32, corresponding R-PDCCH candidate is 1, promptly detects altogether 1 time;
The search volume is: and VRB0, VRB 1 ..., VRB31}; The search volume size is 32 VRB.
In the testing process of above-mentioned any VRB combining form, in a single day mobile relaying detects the R-PDCCH that is complementary with himself ID just stops to detect.
The 3rd embodiment interweaves in the band.In the present embodiment, suppose to move relaying and belong to relaying in the band, and each R-PDCCH that moves relaying under the covering of same base station is interweaved.At this moment, definite method of the search volume of UE is the same basically among the definite and current LTE/LTE-A of search volume.Difference is that the number of the pairing R-PDCCH candidate of L=16 is 1 or 2, and during L=32, the number of pairing R-PDCCH candidate is 1.
The 4th embodiment, outer non-interweaving of band, and the down control channel of mobile relaying is made up of L CCE.In the present embodiment, mobile relaying belongs to the outer relaying of band, and the down control channel of 4 mobile relayings under the same base station covering is non-interweaving, and is made up of L CCE, and L ∈ 4,8,16,32}.At this moment, the down control channel that moves relaying is carried on preceding several OFDM symbols of the 1st time slot of every subframe.
In the present embodiment, suppose that the base station is fixed on a certain specific CCE call number place with the original position of the search volume of 4 MR of its subordinate, this CCE call number also can be semi-static variable, that is:
For example, the original position of the search volume of MR1, MR2, MR3 and MR4 is respectively CCE0, CCE16, CCE20 and CCE55.At this moment, each MR need begin blind Detecting respectively from initial CCE call number separately, and the search volume can not surpass the sum of CCE.
In the present embodiment, that supposes CCE adds up to 80, notifies each MR by high-level signaling.
Blind detection process with MR1 is an example, comprising:
MR1 begins from L=4, begins to detect for one group by 4-CCE from CCE0, and corresponding candidate's control channel is 2 or 3 or 4, promptly detects altogether 2 or 3 or 4 times;
Corresponding search volume is: { { CCE0, CCE1, CCE2, CCE3}, { CCE4, CCE5, CCE6, CCE7}}, or { { CCE0; CCE1, CCE2, CCE3}, { CCE4, CCE5, CCE6, CCE7}, { CCE8, CCE9; CCE10, CCE11}}, or { { CCE0, CCE1, CCE2, CCE3}, { CCE4, CCE5, CCE6; CCE7}, { CCE8, CCE9, CCE10, CCE11}, { CCE12, CCE13, CCE14, CCE15}}; The search volume size is: 8 or 12 or 16 CCE.
If MR1 does not detect the down control channel that is complementary with himself ID, then continue to begin to detect for one group by 8-CCE from L=8, corresponding candidate's control channel is 2 or 3 or 4, promptly detects altogether 2 or 3 or 4 times;
Corresponding search volume is: CCE0, and CCE1 ..., CCE7}, and CCE8, CCE9 ..., CCE15}}, or { { CCE0; CCE1 ..., CCE7}, CCE8, CCE9 ..., CCE15}, { CCE16, CCE17; ..., CCE23}}, or CCE0, CCE1 ..., CCE7}, and CCE8, CCE9 ...; CCE15}, and CCE16, CCE17 ..., CCE23}, and CCE24, CCE25 ..., CCE31}}; The search volume size is: 16 or 24 or 32 CCE.
If MR1 does not detect the down control channel that is complementary with himself ID, then continue to begin to detect for one group by 16-CCE from L=16, corresponding candidate's control channel is 1 or 2, promptly detects altogether 1 or 2 time;
Corresponding search volume is: CCE0, and CCE1 ..., CCE15}}, or CCE0, CCE1 ..., CCE15}, and CCE16, CCE17 ..., CCE31}}; The search volume size is: 16 or 32 CCE.
If MR1 does not detect the down control channel that is complementary with himself ID, then continue to begin to detect for one group by 32-CCE from L=32, corresponding candidate's control channel is 1, promptly detects altogether 1 time;
Corresponding search volume is: CCE0, and CCE1 ..., CCE31}}; The search volume size is: 32 CCE.
In the testing process of above-mentioned any CCE combining form, in a single day MR detects the R-PDCCH that is complementary with himself ID will stop blind check.
Blind Detecting with MR4 is an example, and process is following:
MR4 begins from L=4, begins to detect for one group by 4-CCE from CCE20, and corresponding candidate's control channel is 2 or 3 or 4, promptly detects altogether 2 or 3 or 4 times;
Corresponding search volume is: { { CCE55, CCE56, CCE57, CCE58}, { CCE59, CCE60, CCE61, CCE62}}, or { { CCE55; CCE56, CCE57, CCE58}, { CCE59, CCE60, CCE61, CCE62}, { CCE63, CCE64; CCE65, CCE66}}, or { { CCE55, CCE56, CCE57, CCE58}, { CCE59, CCE60, CCE61; CCE62}, { CCE63, CCE64, CCE65, CCE66}, { CCE67, CCE68, CCE69, CCE70}}; The search volume size is: 8 or 12 or 16 CCE.
If MR4 does not detect the down control channel that is complementary with himself ID, then continue to begin to detect for one group by 8-CCE from L=8, corresponding candidate's control channel is 2 or 3, promptly detects altogether 2 or 3 times.Attention: when candidate's control channel was 4, the search volume can exceed the sum of CCE, and therefore, in this case, candidate's control channel can only be 2 or 3.
Corresponding search volume is: CCE55, and CCE56 ..., CCE62}, and CCE63, CCE64 ..., CCE70}}, or CCE55, CCE56 ..., CCE62}, and CCE63, CCE64 ..., CCE70}, and CCE71, CCE72 ..., CCE78}}; The search volume size is: 16 or 24 CCE.
If MR4 does not detect the down control channel that is complementary with himself ID, then continue to begin to detect for one group by 16-CCE from L=16, corresponding candidate's control channel is 1 or 2, promptly detects altogether 1 or 2 time.Attention: when candidate's control channel was 2, the search volume can exceed the sum of CCE, and therefore, in this case, candidate's control channel can only be 1.
Corresponding search volume is: and CCE55, CCE56 ..., CCE70}; The search volume size is: 16 CCE.
Because CCE adds up to 80, so MR4 can not detect the situation of Λ=32, promptly detects Λ=16 and has just stopped.
In the testing process of above-mentioned any CCE combining form, in a single day MR detects the down control channel that is complementary with himself ID will stop blind check.
In the present embodiment, suppose that the base station is used to carry its down control channel separately for 4 MR of its subordinate dispose one group of fixing CCE respectively, and the scope of search volume is limited within above-mentioned one group of CCE.For example:
1) the search volume scope of MR1 be limited at CCE0, CCE1 ..., among the CCE15}; The search volume scope of MR2 be limited at CCE20, VCCE21 ..., among the CCE51}; The search volume scope of MR3 be limited at CCE55, CCE56 ..., among the CCE62}; The search volume scope of MR4 be limited at CCE65, CCE66 ..., among the CCE80}.
2) original position of the different pairing search volumes of L is all identical, and the original position of each pairing search volume of L is the 1st CCE in the search volume scope separately.As far as MR1, the original position of each pairing search volume of L is CCE0; As far as MR2, the original position of each pairing search volume of L is CCE20; As far as MR3, the original position of each pairing search volume of L is CCE55; As far as MR3, the original position of each pairing search volume of L is CCE65.
Blind Detecting with MR1 is an example, and process is following:
MR1 begins from L=4, begins to detect for one group by 4-CCE from CCE0, and corresponding candidate's control channel is 2 or 3 or 4, promptly detects altogether 2 or 3 or 4 times;
Corresponding search volume is: { { CCE0, CCE1, CCE2, CCE3}, { CCE4, CCE5, CCE6, CCE7}}, or { { CCE0; CCE1, CCE2, CCE3}, { CCE4, CCE5, CCE6, CCE7}, { CCE8, CCE9; CCE10, CCE11}}, or { { CCE0, CCE1, CCE2, CCE3}, { CCE4, CCE5, CCE6; CCE7}, { CCE8, CCE9, CCE10, CCE11}, { CCE12, CCE13, CCE14, CCE15}}; The search volume size is: 8 or 12 or 16 CCE.
If MR1 does not detect the down control channel that is complementary with himself ID, then continue to begin to detect for one group by 8-CCE from L=8, corresponding candidate's control channel is 2, promptly detects altogether 2 times.Attention: when candidate's control channel was 3 or 4, the search volume can exceed the preallocated scope in base station, and therefore, in this case, candidate's control channel can only be 2.
Corresponding search volume is: CCE0, and CCE1 ..., CCE7}, and CCE8, CCE9 ..., CCE15}}; The search volume size is 16 CCE.
If MR1 does not detect the down control channel that is complementary with himself ID, then continue to begin to detect for one group by 16-CCE from L=16, corresponding candidate's control channel is 1 or 2, promptly detects altogether 1 or 2 time.Attention: when candidate's control channel was 2, the search volume can exceed the preallocated scope in base station, and therefore, in this case, candidate's control channel can only be 1.
Corresponding search volume is: CCE0, and CCE1 ..., CCE15}}; The search volume size is: 16 CCE.
Because the scope of the search volume of MR1 has been limited at CCE0～CCE15, therefore, MR1 can not detect the situation of Λ=32, promptly detects Λ=16 and has just stopped.
In the testing process of above-mentioned any CCE combining form, in a single day MR detects the down control channel that is complementary with himself ID will stop blind Detecting.
In like manner, confirming of the search volume of MR2, MR3 and MR4 is the same with MR1, as long as be no more than the scope of preallocated search volume, base station.
In the present embodiment, suppose that the base station is made as a fixed value or semi-static variable respectively with the shared CCE call number of down control channel of 4 MR of its subordinate, and utilize high-level signaling to notify.
For example, the down control channel of MR1 is made up of 16 CCE, and the CCE call number that takies is fixed as { CCE0～CCE15}; The down control channel of MR2 is made up of 32 CCE, and the CCE call number that takies is fixed as { CCE20～CCE51}; The down control channel of MR3 is made up of 4 CCE, and the CCE call number that takies is fixed as { CCE16～CCE19}; The down control channel of MR4 is made up of 8 CCE, and the CCE call number that takies is fixed as { CCE56～CCE63}.Attention: the base station will guarantee that the CCE call number of each MR can not produce overlapping when being each MR distribution of its subordinate CCE call number.
At this moment, MR need not to carry out blind Detecting, as long as the one group of CCE that is distributed is received and demodulation, just can obtain the Downlink Control Information of himself.
In addition, the shared CCE call number of the down control channel of above-mentioned each MR can be a fixed value, also can be the value of semi-static change, need utilize high-level signaling to notify the value after each MR upgrades respectively.
The 5th embodiment, outer non-interweaving of band, and the down control channel of mobile relaying is made up of Λ VRB.Identical with second embodiment with first embodiment, unique difference is: the outer definition with the interior VRB pair of band of band is different.Be with the size of outer VRB pair: on frequency domain, occupy 12 RE, on time domain, occupy all OFDM symbols of whole subframe.And the size of VRB pair in the band: on frequency domain, still occupy 12 RE, but on time domain, will remove---max (the shared OFDM symbol of PDCCH that send for macrocell UE the base station, relaying is the shared OFDM symbol of PDCCH that its subordinate UE sends in the band).
The 6th embodiment, band is outer to interweave.In the present embodiment, MR belongs to the outer relaying of band, and the down control channel of each MR under the covering of same base station interweaves.At this moment, definite method basically identical of the search volume of UE among the definite and current LTE/LTE-A of search volume; Difference is that the number of the pairing candidate's control channel of L=16 is 1 or 2, and the number of the pairing candidate's control channel of L=32 is 1.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the method for a definite search volume is characterized in that, comprise,
According to the number and the corresponding original position thereof of degree of polymerization acquisition candidate control channel, confirm the pairing search volume of different polymerization degree;
Blind Detecting down control channel in the pairing search volume of different polymerization degree;
Wherein, when the down control channel that moves relaying was made up of L=16 CCE, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of L=32 CCE, the number of its pairing candidate's control channel was 1; When the down control channel that moves relaying was made up of VRB pair Λ=16 Physical Resource Block, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of Λ=32 a VRB pair, the number of its pairing candidate's control channel was 1;
And the original position of different L and the pairing search volume of Λ is fixing; Perhaps, by the semi-static notice of high-level signaling.
2. method according to claim 1 is characterized in that, the value of said L and Λ is respectively: 1 or 2 or 4 or 8 or 16 or 32 combination in any.
3. method according to claim 1 is characterized in that, for non-situation about interweaving in the band, the original position of the said different pairing search volume of Λ is all identical; Perhaps, have nothing in common with each other; Perhaps, part is identical, and remainder is different;
Said original position is represented with the VRB call number.
4. method according to claim 1 is characterized in that, is made up of L CCE for the outer down control channel that moves relaying of band, and the original position in said Different L corresponding search space is following:
The base station is fixed as a certain specific CCE call number with the outer original position that moves the search volume of relaying of each band of its subordinate; Perhaps, said initial CCE call number is semi-static variable, and notifies the sum of said initial CCE call number and CCE by high-level signaling;
Said each band is outer to be moved relaying and begins to carry out successively blind Detecting from separately initial CCE call number, and maximum CCE call number is no more than the sum of CCE in the search volume.
5. method according to claim 1 is characterized in that, is made up of L CCE for the outer down control channel that moves relaying of band, and the original position in said Different L corresponding search space is following:
The base station is moved relaying for each band of its subordinate is outer and is distributed one group of fixing CCE to be used to carry its down control channel respectively;
The outer relaying that moves of said each band is carrying out blind Detecting in the scope of search volume separately, and the original position of the different pairing search volumes of L is the 1st CCE in the search volume scope separately;
Said one group of CCE is change that fix or semi-static and is notified by high-level signaling.
6. method according to claim 1 is characterized in that, is made up of L CCE for the outer down control channel that moves relaying of band, and the original position in said Different L corresponding search space is following:
The base station is made as fixed value with the outer one group of shared CCE call number of down control channel that moves relaying of each band of its subordinate, and is perhaps semi-static variable, and notified by high-level signaling;
The outer search volume of moving relaying of said each band is above-mentioned preallocated one group of CCE.
7. method according to claim 1 is characterized in that, when being made up of Λ VRB pair for the outer down control channel that moves relaying of band, the original position of the different pairing search volumes of Λ is all identical; Perhaps, have nothing in common with each other; Perhaps, part is identical, and remainder is different;
Said original position is represented with the VRB call number.
8. the device of a definite search volume is characterized in that, comprise at least confirming unit and detecting unit, wherein,
Confirm the unit, obtain candidate's control channel number and corresponding original position thereof, confirm the pairing search volume of different polymerization degree according to the degree of polymerization, wherein,
When the down control channel that moves relaying was made up of L=16 CCE, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of L=32 CCE, the number of its pairing candidate's control channel was 1;
When the down control channel that moves relaying was made up of Λ=16 a VRB pair, the number of its pairing candidate's control channel was 1 or 2; When the down control channel that moves relaying was made up of Λ=32 a VRB pair, the number of its pairing candidate's control channel was 1;
And the original position of different L and the pairing search volume of Λ is fixing; Perhaps, by the semi-static notice of high-level signaling;
Detecting unit, blind Detecting down control channel in the pairing search volume of different polymerization degree.
9. device according to claim 8 is characterized in that, the value of said L and Λ is respectively: 1 or 2 or 4 or 8 or 16 or 32 combination in any.
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| CN108631995A (en) * | 2017-03-24 | 2018-10-09 | 中兴通讯股份有限公司 | The determination method, apparatus and computer storage media of control channel search space |
| CN108631995B (en) * | 2017-03-24 | 2022-06-24 | 中兴通讯股份有限公司 | Method and device for determining control channel search space and computer storage medium |
| CN109041243A (en) * | 2017-06-12 | 2018-12-18 | 中国移动通信有限公司研究院 | A kind of sending method of Physical Downlink Control Channel, method of reseptance and relevant device |
| CN111566976A (en) * | 2018-01-12 | 2020-08-21 | 高通股份有限公司 | Physical Downlink Control Channel (PDCCH) monitoring with overlapping resources |
| CN111566976B (en) * | 2018-01-12 | 2023-05-12 | 高通股份有限公司 | Physical Downlink Control Channel (PDCCH) monitoring with overlapping resources |
| CN114826477A (en) * | 2021-01-18 | 2022-07-29 | 大唐移动通信设备有限公司 | Control channel monitoring method, device and storage medium |
| CN114826477B (en) * | 2021-01-18 | 2024-01-30 | 大唐移动通信设备有限公司 | Control channel monitoring method, device and storage medium |
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| Publication number | Publication date |
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| WO2012174913A1 (en) | 2012-12-27 |
| CN102843748B (en) | 2017-09-12 |
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