CN102448082B - Method and system for detecting public search space of relay node - Google Patents
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Abstract
The invention provides a method and a system for detecting a public search space of a relay node. The method comprises the following steps of: determining an initial position for detecting the public search space; and carrying out blind detection on the public search space from the initial position according to different combination forms. The method and the system for detecting the public search space, which are provided by the invention, can be well suitable for the RN (Relay Node); not only is low complexity of the RN in the blind detection process ensured, but also public control information or scheduling information can be rapidly detected; the method and the system have little blind detection time delay; the working efficiency of a mobile communication system is improved; and relay link resources are sufficiently utilized.
Description
Technical field
The present invention relates to mobile communication technology field, relate in particular to detection method and the system of the public search space of a kind of via node (Relay Node, RN).
Background technology
Long Term Evolution (Long Term Evolution, LTE) system, senior Long Term Evolution (LTE-Advanced, LTE-A) system and IMT-Advanced (International Mobile TelecommunicationAdvanced, IMT-Advanced) system is all with OFDM (Orthogonal FrequencyDivision Multiplexing, OFDM) technology is basis, and ofdm system is the data mode of time-frequency bidimensional.1 subframe (subframe) is comprised of 2 time slots (slot), and during normal cyclic prefix (Cyclic Prefix, CP), each slot is comprised of 7 OFDM symbols; During expansion CP, each slot is comprised of 6 OFDM symbols.Wherein, down control channel (Physical Downlink Control Channel, PDCCH) is positioned on front 1 or 2 or 3 or 4 OFDM symbol of each subframe.
In LTE system, the design of PDCCH consists of several different parts, and each part has its specific function.For convenience of description, the following describes several terms and agreement:
1. Resource Unit (Resource Element, RE): minimum time/frequency source block, occupies 1 subcarrier on 1 OFDM symbol.
2. resource unit group (Resource Element Group, REG): according to the difference of reference symbol position on each OFDM symbol, 1 REG can be comprised of 4 or 6 RE; Particularly, on OFDM symbol, contain reference symbol, namely during pilot tone, now 1 REG is comprised of 6 RE, and wherein has 2 referenced symbols of RE to take; While not containing reference symbol on OFDM symbol, now 1 REG is comprised of 4 RE.
3. Physical Resource Block (Physical Resource Block, PRB): being continuous 1 time slot in time-domain, is continuous 12 subcarriers in frequency domain.
4. Physical Resource Block is to (PRB pair): in time-domain, being continuous 1 subframe, is continuous 12 subcarriers in frequency domain.
5. control channel unit (Control Channel Element, CCE): by 36 RE, 9 REG, formed, the information comprising in CCE has: user's descending scheduling authorization message (DL grant), uplink scheduling authorization information (UL grant), and and system message (System Information, SI), random access (Random Access, RA) response message, the relevant information of paging (Paging) message.
The combining form of 6.Aggregation level L:CCE, be that PDCCH can only consist of L CCE, wherein L ∈ { 1,2,4,8}, that is to say, PDCCH can only comprise following combining form: the combination (4-CCE) of the combination (2-CCE) of the combination of 1 CCE (1-CCE), 2 CCE, 4 CCE and the combination (8-CCE) of 8 CCE form.And the encoder bit rate of above-mentioned 4 kinds of different combinations are respectively corresponding again 4 kinds of different encoder bit rates: 1-CCE is 2/3, the encoder bit rate of 2-CCE is 1/3, the encoder bit rate of 4-CCE is 1/6, the encoder bit rate of 8-CCE is 1/12.
7. search volume (Search Space, SS): search volume consists of some groups of candidate control channels, user terminal (User Equipment, UE) is monitored search volume, and in search volume, carry out blind Detecting, to detect and own relevant down control channel.
8. the search volume of two types: a kind of is public search space (Common Search Space), the search volume that all UE will monitor, wherein carrying is the public information relevant to SI, RA response message and Paging message; Another kind is UE dedicated search space (UE-specific Search Space), and wherein that carrying is DL grant and the UL grant of UE special use.
9. the size of public search space is CCE 0～CCE 15, i.e. totally 16 CCE wherein can be for UE dedicated search space for the CCE of public search space.
10. different CCE aggregation level has the number of its corresponding candidate control channel, is the maximum times of blind Detecting.For example, public search space is only comprised of 4-CCE and 8-CCE, and candidate control channel number corresponding to 4-CCE be 4, by 4 CCE, is that one group of number of times that carries out blind Detecting is no more than 4 times; The candidate control channel number that 8-CCE is corresponding is 2, by 8 CCE, is that one group of number of times that carries out blind Detecting is no more than 2 times
The detailed process that in LTE system, UE carries out blind Detecting to public search space is as follows:
At eNB, hold:
The 1st step: the PDCCH of each UE is carried out respectively to chnnel coding;
The 2nd step: the PDCCH of all UE after coding is together in series, carries out scrambling by the sequence of cell-specific;
The 3rd step: carry out Quadrature Phase Shift Keying (Quadrature Phase Shift Keying, QPSK) modulation, that now obtain is the corresponding a string CCE of all PDCCH, and they are numbered since 0; Suppose that down control channel now consists of 32 CCE altogether, they be numbered CCE 0, CCE1 ..., CCE 31.Wherein public search space takies at most front 16 CCE, and CCE 0～CCE 15, and the remaining CCE not used by public search space can continue on for UE-specific Search Space.
The 4th step: above-mentioned a string CCE be take to REG and be mapped to after unit interweaves on the running time-frequency resource at PDCCH place, wherein, on frequency domain, occupy whole system bandwidth, in time domain, specifically having taken several symbols is indicated in detail by Physical Control Format Indicator Channel (Physical Control Format Indicate Channel, PCFICH).
The 5th step: carry out launching after Fast Fourier Transform Inverse (IFFT).
At UE, hold:
The 1st step: receiving terminal receives the PDCCH in whole bandwidth, carries out after fast Fourier transform (FFT), and through deinterleaving, obtains having with eNB end a string CCE of identical numbering;
The 2nd step: the original position of public search space is always CCE 0, and determine public search space according to the number of candidate control channel.
UE starts to carry out blind Detecting from being combined as 4-CCE, because the original position of public search space is 0, therefore, the search volume that 4-CCE is corresponding is { [CCE 0, CCE 1, CCE 2, CCE 3], [CCE 4, CCE 5, CCE 6, CCE 7], [CCE 8, CCE 9, CCE 10, CCE 11], [CCE 12, CCE13, CCE 14, CCE 15] }, that is to say, UE need to detect 4 times.
The 3rd step: do not identify (SystemInformation-Radio Network Temporary Identifier if UE listens to the casual network of system information, SI-RNTI) or RNTI (the Random Access RNTI of random access, RA-RNTI) or the RNTI of paging (Paging RNTI, P-RNTI) common control information matching, from being combined as 8-CCE, start to carry out blind Detecting, the search volume that 8-CCE is corresponding is that { [CCE 0, CCE 1, CCE 2, CCE 3, CCE 4, CCE 5, CCE 6, CCE 7], [CCE 8, CCE 9, CCE 10, CCE 11, CCE 12, CCE 13, CCE 14, CCE 15] }, that is to say, UE need to detect 2 times.
The 4th step: if in whole blind detection process, UE does not listen to the common control information matching with SI-RNTI or RA-RNTI or P-RNTI, illustrates and does not now have common control channel order to assign.
Due to future broadband wireless communication systems or cellular system requirement increase coverage, support higher rate transmission, this has proposed new challenge to wireless communication technology; Meanwhile, 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 causing is thus more serious.In order to increase the coverage of high data rate, group mobility, casual network deployment, improve the throughput of cell edge, and provide service for the user in the covering leak of cellular system, in wireless communication system, introduced relaying (Relay) technology, so relaying technique is regarded as a key technology of 4G.
If Fig. 1 is for introducing the mobile communication system Organization Chart of RN, link between this base stations in mobile communication system (eNB) and RN is called repeated link (Backhaul Link, also referred to as Un Link), link between UE under RN and its coverage is called access link (Access Link, also referred to as UuLink), 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 is just equivalent to a UE; Concerning UE, RN is just equivalent to eNB.
At present, in adopting band, during relaying (inband relay) mode, Un Link and Uu Link are used identical frequency band, and for fear of the transmitting-receiving interference of RN self, RN can not carry out the operation of sending and receiving in same frequency resource simultaneously.Therefore, in downlink relay link subframe (backhaul subframe) (being that eNB is to the subframe at RN transmission data place), with reference to figure 2, it illustrates the frame structure of descending backhaul subframe, particularly, for the ease of distinguishing, Fig. 2 shows 2 subframes, the subframe on the left side is a normal subframe, the subframe on the right is a descending backhaul subframe, the process of the transceiving data that it is concrete: RN sends PDCCH first on front 1 or 2 OFDM symbol, to its subordinate's UE, then within a period of time, (interval gap as shown in FIG.) carries out from being transmitted into the switching of reception, after having switched, on OFDM symbol below, receive the data from eNB, comprising relay node downlink control channel (Relay Physical Downlink Control Channel, R-PDCCH) and via node Physical Downlink Shared Channel (Relay Physical Downlink Shared Channel, R-PDSCH).
In descending backhaul subframe, semi-statically reserved some PRB pair are for the transmission of R-PDCCH for eNB, and the R-PDCCH that eNB sends to RN is carried on PRB pair, comprises the information such as up/down row scheduling authorization of RN.As shown in Figure 3, the PDCCH of UE transmits on the individual OFDM symbol of the front n (n≤3) of 1st slot, DL grant transmits on remaining OFDM symbol except PDCCH takies 1st slot's, UL grant transmits on whole OFDM symbols of 2nd slot, and the R-PDCCH of RN can be carried on and remove for transmitting other OFDM symbols of PDCCH.
Public search space about R-PDCCH in 3GPP meeting is the focus of discussing always.At present, just think that the public search space of RN is necessary to exist, but also without any the concrete scheme about its blind Detecting.
Summary of the invention
In view of this, main purpose of the present invention is to provide detection method and the system of the public search space of a kind of RN, has reduced RN and public search space has been carried out to the complexity of blind Detecting.
For achieving the above object, technical scheme of the present invention is achieved in that
A detection method for the public search space of via node RN, described method comprises the steps:
Determine the original position that public search space is detected;
From described original position, according to different combining forms, public search space is carried out to blind Detecting.
Wherein, the original position of described definite described public search space is specially: when described public search space is comprised of PRB pair one group of Physical Resource Block PRB or Physical Resource Block, determine that described original position is any PRB or the PRB pair in described one group of PRB or PRB pair;
Correspondingly, described from described original position, according to different combining forms, public search space being carried out to blind Detecting is: from described original position, according to PRB or PRB pair combining form, described PRB or PRB pair are carried out to blind Detecting respectively, wherein PRB or PRB pair combining form are { 1,2,3, one or more in 4,6,8}.
Further, described from original position, according to PRB or PRB pair combining form, be that 1-PRB, 2-PRB, 3-PRB, 4-PRB, 6-PRB or 8-PRB carry out the blind Detecting of same number or different number of times to described PRB or PRB pair respectively.
Further, public search space being carried out to blind Detecting is: at the 1st slot s lot or the 2nd slot of described PRB or PRB pair or on 2 slot, public search space is carried out to blind Detecting simultaneously.
Further, describedly determine that the original position of described public search space is specially: when described public search space is comprised of the control channel unit R-CCE of one group of via node, determine that described original position is any R-CCE in described one group of R-CCE;
Correspondingly, described from described original position, according to different combining forms, public search space being carried out to blind Detecting is: from described original position, according to R-CCE combining form, described R-CCE is carried out to blind Detecting respectively, wherein R-CCE combining form is { 1, one or more in 2,4,8}.
Further, described from original position, according to R-CCE combining form, be that 1-R-CCE, 2-R-CCE, 4-R-CCE, 8-R-CCE carry out the blind Detecting of same number or different number of times to described R-CCE respectively.
Further, describedly public search space is carried out to blind Detecting be: at the 1st slot or the 2nd slot of described R-CCE place subframe or on 2 slot, public search space is carried out to blind Detecting simultaneously.
Further, described method also comprises: when detecting with system message casual network sign or accidental access response message casual network identifies or beep-page message casual network identifies the schedule information matching, according to the indication of the schedule information matching, on corresponding running time-frequency resource, obtain common control information itself, described common control information comprises at least one in system message, accidental access response message and beep-page message;
Wherein, when described public search space is comprised of one group of PRB or PRB pair, the information of public search space carrying is common control information or schedule information; When described public search space is comprised of one group of R-CCE, the information of public search space carrying is schedule information.
A detection system for the public search space of via node, described system comprises: original position determining unit and blind Detecting unit; Wherein, original position determining unit is for determining the original position that described public search space is detected; Blind Detecting unit, for from the determined original position of described original position determining unit, carries out blind Detecting according to different combining forms to common search.
Further, described original position determining unit, specifically for when described public search space is comprised of one group of PRB or PRB pair, determines that described original position is any PRB or the PRB pair in described one group of PRB or PRB pair;
Correspondingly, described blind Detecting unit is specifically for from the determined original position of described original position determining unit, according to PRB or PRB pair combining form, described PRB or PRB pair are carried out to blind Detecting respectively, wherein PRB or PRB pair combining form are { 1,2,3,4, one or more in 6,8}.
Further, described original position determining unit also, for when described public search space is comprised of the control channel unit R-CCE of one group of via node, determines that described original position is any R-CCE in described one group of R-CCE;
Correspondingly, described blind Detecting unit also, for from the determined original position of described original position determining unit, carries out blind Detecting according to R-CCE combining form to described R-CCE respectively, and wherein R-CCE combining form is for being { one or more in 1,2,4,8}.
The detection method of search volume provided by the invention and system, can be applicable to well RN, not only guaranteed RN lower complexity when public search space is carried out to blind Detecting, and can fast detecting arrive common control information or schedule information, there is less blind Detecting time delay, improve the operating efficiency of mobile communication system, taken full advantage of repeated link resource.
Accompanying drawing explanation
Fig. 1 is for introducing the mobile communication system Organization Chart of RN;
Fig. 2 is descending backhaul sub-frame frame structural representation;
Fig. 3 is R-PDCCH and the position relationship schematic diagram of PDCCH in PRB pair;
Fig. 4 is the schematic flow sheet of detection method of the public search space of RN of the present invention;
Fig. 5 is the structural representation of detection system of the public search space of RN of the present invention.
Embodiment
Basic thought of the present invention is: the original position of determining described public search space; From described original position, according to different combining forms, public search space is carried out to blind Detecting.
For making the object, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 4 shows the flow process of detection method of the public search space of RN, and as shown in Figure 4, described method comprises the steps:
In this step, eNB and RN are mutual by high-level signaling, determine the original position that RN detects public search space.
Particularly, when described public search space is comprised of one group of PRB or PRB pair, can determine that the original position that RN detects is any PRB or the PRBpair in described one group of PRB or PRB pair; Preferably, conventionally first PRB in one group of PRB or PRB pair or PRB pair are defined as to original position;
When described public search space is comprised of one group of R-CCE, determine that described original position is any R-CCE in described one group of R-CCE; Preferably, conventionally first R-CCE in one group of R-CCE is defined as to original position.Described R-CCE is the CCE that RN can be used.
In addition, when described public search space is comprised of one group of PRB or PRB pair, the information of public search space carrying is common control information or schedule information; When described public search space is comprised of one group of R-CCE, the information of public search space carrying is schedule information; Wherein said common control information comprises at least one in system message, accidental access response message and beep-page message.
Particularly, when described public search space is comprised of one group of PRB or PRB pair, RN is from described original position, according to PRB or PRB pair combining form, described PRB or PRB pair are carried out to blind Detecting respectively, wherein PRB or PRB pair combining form are { 1,2,3, one or more in 4,6,8}; Preferably, conventionally use the combining form of 2-PRB and 4-PRB; And, at RN, according to PRB or PRB pair combining form, be that 1-PRB, 2-PRB, 3-PRB, 4-PRB, 6-PRB or 8-PRB are during to described PRB or PRB pair blind Detecting respectively, specifically can or on 2 slot, to public search space, carry out blind Detecting at the 1st slot or the 2nd slot of described PRB or PRB pair simultaneously, and the number of times of its detection, every kind of corresponding candidate control channel of combining form can be identical or different;
When described public search space is comprised of one group of R-CCE, RN, from described original position, carries out blind Detecting according to R-CCE combining form to described R-CCE respectively, and wherein R-CCE combining form is { one or more in 1,2,4,8}; Preferably, conventionally use the combining form of 2-R-CCE and 4-R-CCE; And, RN is that 1-R-CCE, 2-R-CCE, 4-R-CCE, 8-R-CCE are while carrying out blind Detecting to described R-CCE according to R-CCE combining form respectively, specifically can or on 2 slot, to public search space, carry out blind Detecting at the 1st slot or the 2nd slot of described R-CCE place subframe simultaneously, and the number of times of its detection, every kind of corresponding candidate control channel of combining form can be identical or different.
In this step, when detecting with system message casual network sign or accidental access response message casual network identifies or beep-page message casual network identifies the schedule information matching, according to the indication of the schedule information matching, on corresponding running time-frequency resource, obtain common control information itself, described common control information comprises at least one in system message, accidental access response message and beep-page message.
With specific embodiment, above-mentioned mapping method is described further below.
In the present embodiment, the public search space of RN is comprised of one group of PRB or PRB pair, wherein eNB is semi-static 15 PRB or the PRB pair of having reserved of R-PDCCH, and eNB is that the high level that semi-static reserved 15 PRB of R-PDCCH or PRB pair are eNB is determined according to traffic carrying capacity.ENB and RN are mutual by high-level signaling, determine that the original position that RN detects is first PRB or the PRB pair in described 15 PRB or PRBpair, be PRB0, wherein, the information of described public search space carrying is common control information itself, and described common control information comprises at least one in system message, accidental access response message and beep-page message.
Due to public search space carrying be common control information itself, therefore, eNB first can by high-level signaling inform this common control information of RN be specially in system message, accidental access response message and beep-page message which or which;
In the present embodiment, can determine that the combining form that public search space is carried out to blind Detecting is followed successively by 2-PRB, 4-PRB, 6-PRB, every kind of corresponding detection number of times of combining form is 1.
Particularly, RN is according to the mapping time slot of predetermined common control information, public search space is carried out to blind Detecting: when the mapping time slot of predetermined common control information is the 1st slot of PRB or PRB pair, first according to the combining form of 2-PRB from PRB0, to { PRB0, the 1st slot of PRB1} carries out 1 time and detects, and detects altogether 1 time;
After detecting, while not detecting corresponding common control information, according to the combining form of 4-PRB from PRB0, to PRB0, PRB 1, PRB2, the 1st slot of PRB3} carries out 1 time and detects, and detects altogether 1 time;
Complete when detecting, while still not detecting corresponding common control information, according to the combining form of 6-PRB from PRB0, to { PRB0, PRB1, PRB2, PRB3, PRB4, the 1st slot of PRB5} carries out 1 time and detects, detect altogether 1 time, if while still not detecting corresponding common control information, think that eNB does not carry out assigning of common control information;
If in the testing process of above-mentioned any PRB or PRB pair combining form, while detecting corresponding common control information, RN stops detecting.
In the present embodiment, the public search space of RN is comprised of one group of PRB or PRB pair, wherein eNB is semi-static 10 PRB or the PRB pair of having reserved of R-PDCCH, and eNB is that the high level that semi-static reserved 10 PRB of R-PDCCH or PRB pair are eNB is determined according to traffic carrying capacity.ENB and RN are mutual by high-level signaling, determine that original position that RN detects is the 3rd PRB or the PRB pair in described 10 PRB or PRBpair, be PRB2, wherein, the information of described public search space carrying is common control information itself, and described common control information comprises at least one in system message, accidental access response message and beep-page message.
Due to public search space carrying be common control information itself, therefore, eNB first can by high-level signaling inform this common control information of RN be specially in system message, accidental access response message and beep-page message which or which;
In the present embodiment, can determine that the combining form that public search space is carried out to blind Detecting is followed successively by 2-PRB, 4-PRB, 6-PRB, wherein the corresponding detection number of times of 2-PRB combining form is 2; The corresponding detection number of times of 4-PRB combining form is 1; The corresponding detection number of times of 6-PRB combining form is 1.
Particularly, RN is according to the mapping time slot of predetermined common control information, public search space is carried out to blind Detecting: when the mapping time slot of predetermined common control information is the 2nd slot of PRB or PRB pair, first according to the combining form of 2-PRB from PRB2, to { PRB2, PRB3} and PRB4, the 2nd slot of PRB5} carries out respectively 1 time and detects, and detects altogether 2 times;
After detecting, while not detecting corresponding common control information, according to the combining form of 4-PRB from PRB2, to PRB2, PRB3, PRB4, the 2nd slot of PRB5} carries out 1 time and detects, and detects altogether 1 time;
Complete when detecting, while still not detecting corresponding common control information, according to the combining form of 6-PRB from PRB2, to { PRB2, PRB3, PRB4, PRB5, PRB6, the 2nd slot of PRB7} carries out 1 time and detects, detect altogether 1 time, if while still not detecting corresponding common control information, think that eNB does not carry out assigning of common control information;
If in the testing process of above-mentioned any PRB or PRB pair combining form, while detecting corresponding common control information, RN stops detecting.
Embodiment 3
In the present embodiment, the public search space of RN is comprised of one group of PRB or PRB pair, wherein eNB is semi-static 20 PRB or the PRB pair of having reserved of R-PDCCH, and eNB is that the high level that semi-static reserved 20 PRB of R-PDCCH or PRB pair are eNB is determined according to traffic carrying capacity.ENB and RN are mutual by high-level signaling, determine that original position that RN detects is the 6th PRB or the PRB pair in described 20 PRB or PRBpair, i.e. PRB5, and wherein, the information of described public search space carrying is schedule information.
Due to public search space carrying be schedule information, therefore, eNB do not need by high-level signaling inform this common control information of RN be specially in system message, accidental access response message and beep-page message which or which;
In the present embodiment, can determine that the combining form that public search space is carried out to blind Detecting is followed successively by 1-PRB, 2-PRB, 4-PRB, wherein the corresponding detection number of times of 1-PRB combining form is 4; The corresponding detection number of times of 2-PRB combining form is 2; The corresponding detection number of times of 4-PRB combining form is 1.
Particularly, RN is according to the mapping time slot of predetermined common control information, public search space is carried out to blind Detecting: when the mapping time slot of predetermined common control information is 2 slot of PRB or PRB pair, first according to the combining form of 1-PRB from PRB5, to { PRB5}, { PRB6}, { PRB7} and { 2 slot of PRB8} carry out respectively 1 time and detect, and detect altogether 4 times;
After detecting, while not detecting the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign, according to the combining form of 2-PRB from PRB5, to { PRB5, PRB6} and { PRB7,2 slot of PRB8} carry out respectively 1 time and detect, and detect altogether 2 times;
Complete when detecting, still do not detect with system message casual network and identify, or accidental access response message casual network sign, or beep-page message casual network sign match schedule information time, according to the combining form of 4-PRB from PRB5, to { PRB5, PRB6, PRB7, 2 slot of PRB8} carry out 1 time and detect, detect altogether 1 time, if still detect with system message casual network, do not identify, or accidental access response message casual network sign, or beep-page message casual network sign match schedule information time, think that eNB does not carry out assigning of schedule information,
If in the testing process of above-mentioned any PRB or PRB pair combining form, while detecting the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign, RN stops detecting, and to corresponding running time-frequency resource, obtaining common control information itself according to described schedule information, described common control information comprises at least one in system message, accidental access response message and beep-page message.
Embodiment 4
In the present embodiment, the part R-CCE of the public search space of RN in one group of R-CCE of all carrying DL grant forms, and the high level that wherein the R-CCE number of the carrying DL grant of all RN under eNB covering is eNB is determined according to traffic carrying capacity.CNB and RN are mutual by high-level signaling, determine that the original position that RN detects is first R-CCE in described one group of R-CCE, i.e. R-CCE0, and wherein, the information of described public search space carrying is schedule information.
Due to public search space carrying be schedule information, therefore, eNB do not need by high-level signaling inform this common control information of RN be specially in system message, accidental access response message and beep-page message which or which;
In the present embodiment, can determine that the combining form that public search space is carried out to blind Detecting is followed successively by 2-R-CCE, 4-R-CCE, 8-R-CCE, wherein the corresponding detection number of times of 2-R-CCE combining form is 4; The corresponding detection number of times of 4-R-CCE combining form is 2; The corresponding detection number of times of 8-R-CCE combining form is 1.
Particularly, as seen from Figure 3, DL grant is carried on the 1st slot of a subframe conventionally, therefore that public search space is carried out to blind detection process is as follows for RN: first according to the combining form of 2-R-CCE from R-CCE0, to { R-CCE0, the R-CCE1}, { R-CCE2 on the 1st slot, R-CCE3}, { R-CCE4, R-CCE5} and R-CCE6, R-CCE7} carries out respectively 1 time and detects, and detects altogether 4 times;
After detecting, while if the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign not detected, according to the combining form of 4-R-CCE from R-CCE0, to { R-CCE0, the R-CCE1 on the 1st slot, R-CCE2, R-CCE3} and { R-CCE4, R-CCE5, R-CCE6, R-CCE7} carries out respectively 1 time and detects, and detects altogether 2 times;
After detecting, while if the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign still not detected, according to the combining form of 8-R-CCE from R-CCE0, to { the R-CCE0 on the 1st slot, R-CCE1, R-CCE2, R-CCE3, R-CCE4, R-CCE5, R-CCE6, R-CCE7} carries out 1 time and detects, and detects altogether 1 time; If while still not detecting the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign, think that eNB does not carry out assigning of schedule information;
If in the testing process of above-mentioned any R-CCE combining form, while detecting the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign, RN stops detecting, and according to the indication of the schedule information matching, on corresponding running time-frequency resource, obtain common control information itself, described common control information comprises at least one in system message, accidental access response message and beep-page message.
Embodiment 5
In the present embodiment, the part R-CCE of the public search space of RN in one group of R-CCE of all carrying UL grant forms, and the high level that wherein the R-CCE number of the carrying UL grant of all RN under eNB covering is eNB is determined according to traffic carrying capacity.ENB and RN are mutual by high-level signaling, determine that the original position that RN detects is the 6th R-CCE in described one group of R-CCE, i.e. R-CCE5, and wherein, the information of described public search space carrying is schedule information.
Due to public search space carrying be schedule information, therefore, eNB do not need by high-level signaling inform this common control information of RN be specially in system message, accidental access response message and beep-page message which or which;
In the present embodiment, can determine that the combining form that public search space is carried out to blind Detecting is followed successively by 2-R-CCE, 4-R-CCE, wherein the corresponding detection number of times of 2-R-CCE combining form is 2; The corresponding detection number of times of 4-R-CCE combining form is 1.
Particularly, as seen from Figure 3, UL grant is carried on the 2nd slot of a subframe conventionally, therefore that public search space is carried out to blind detection process is as follows for RN: first according to the combining form of 2-R-CCE from R-CCE5, to { the R-CCE5 on the 2nd slot, R-CCE6} and R-CCE7, R-CCE8} carries out respectively 1 time and detects, and detects altogether 2 times;
After detecting, while if the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign not detected, according to the combining form of 4-R-CCE from R-CCE5, to { the R-CCE5 on the 2nd slot, R-CCE6, R-CCE7, R-CCE8} carries out 1 time and detects, and detects altogether 1 time; If while still not detecting the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign, think that eNB does not carry out assigning of schedule information;
If in the testing process of above-mentioned any R-CCE combining form, while detecting the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign, RN stops detecting, and according to the indication of the schedule information matching, on corresponding running time-frequency resource, obtain common control information itself, described common control information comprises at least one in system message, accidental access response message and beep-page message.
Embodiment 6
In the present embodiment, the part R-CCE of the public search space of RN in one group of R-CCE of all carrying DL grant and UL grant forms, and the high level that wherein the carrying DL grant of all RN under eNB covering and the R-CCE number of UL grant are eNB is determined according to traffic carrying capacity.ENB and RN are mutual by high-level signaling, determine that original position that RN detects is the 1st R-CCE in the R-CCE of described carrying DL grant, be the 1st R-CCE in the R-CCE of R-CCE0 and described carrying UL grant, be R-CCE0, wherein, the information of described public search space carrying is schedule information.
Due to public search space carrying be schedule information, therefore, eNB do not need by high-level signaling inform this common control information of RN be specially in system message, accidental access response message and beep-page message which or which;
In the present embodiment, can determine that the combining form that public search space is carried out to blind Detecting is followed successively by 2-R-CCE, 4-R-CCE, wherein the corresponding detection number of times of 2-R-CCE combining form is 2; The corresponding detection number of times of 4-R-CCE combining form is 1.
Particularly, as seen from Figure 3, DL grant is carried on the 1st slot of a subframe conventionally, UL grant is carried on the 2nd slot of a subframe conventionally, therefore that public search space is carried out to blind detection process is as follows for RN: first according to the combining form of 2-R-CCE from R-CCE0, to { the R-CCE0 on the 1st slot, { R-CCE0 on R-CCE1} and the 2nd slot, R-CCE1} jointly carries out 1 time and detects, if detected with system message casual network, do not identify, or accidental access response message casual network sign, or beep-page message casual network sign match schedule information time, again to the { R-CCE2 on the 1st slot, { R-CCE2 on R-CCE3} and the 2nd slot, R-CCE3} jointly carries out 1 time and detects, detect altogether 2 times,
After detecting, while if the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign still not detected, according to the combining form of 4-R-CCE from R-CCE0, to { R-CCE0, R-CCE1, the R-CCE2 on the 1st slot, { R-CCE0 on R-CCE3} and the 2nd slot, R-CCE1, R-CCE2, R-CCE3} jointly carries out 1 time and detects;
If while also not detecting the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign, think that eNB does not carry out assigning of schedule information;
If in the testing process of above-mentioned any R-CCE combining form, while detecting the schedule information matching with system message casual network sign or accidental access response message casual network sign or beep-page message casual network sign, RN stops detecting, and according to the indication of the schedule information matching, on corresponding running time-frequency resource, obtain common control information itself, described common control information comprises at least one in system message, accidental access response message and beep-page message.
Fig. 5 shows the structural representation of detection system of the public search space of RN, and as shown in Figure 5, described detection system comprises: original position determining unit 10 and blind Detecting unit 20; Wherein original position determining unit 10 is for determining the original position that described public search space is detected; Blind Detecting unit 20, for from the determined original position of described original position determining unit 10, carries out blind Detecting according to different combining forms to common search.
Further, described original position determining unit 10, specifically for when described public search space is comprised of one group of PRB or PRB pair, determines that described original position is any PRB or the PRB pair in described one group of PRB or PRB pair;
Correspondingly, described blind Detecting unit 20 is specifically for from the determined original position of described original position determining unit 10, according to PRB or PRB pair combining form, described PRB or PRB pair are carried out to blind Detecting respectively, wherein PRB or PRB pair combining form are { 1,2,3,4, one or more in 6,8}.
Further, described original position determining unit 10 also, for when described public search space is comprised of the control channel unit R-CCE of one group of via node, determines that described original position is any R-CCE in described one group of R-CCE;
Correspondingly, described blind Detecting unit also, for from the determined original position of described original position determining unit 10, carries out blind Detecting according to R-CCE combining form to described R-CCE respectively, wherein R-CCE combining form is { 1, one or more in 2,4,8}.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (11)
1. a detection method for the public search space of via node RN, is characterized in that, described method comprises the steps:
When described public search space is comprised of PRB pair one group of Physical Resource Block PRB or Physical Resource Block, determine that the original position that public search space is detected is any PRB or the PRB pair in described one group of PRB or PRB pair;
When described public search space is comprised of the control channel unit R-CCE of one group of via node, determine that the original position that public search space is detected is any R-CCE in described one group of R-CCE;
From described original position, according to different combining forms, public search space is carried out to blind Detecting.
2. detection method according to claim 1, it is characterized in that, when described public search space is comprised of PRB pair one group of Physical Resource Block PRB or Physical Resource Block, described from described original position, according to different combining forms, public search space is carried out to blind Detecting and be:
From described original position, according to PRB or PRB pair combining form, described PRB or PRB pair are carried out to blind Detecting respectively, wherein PRB or PRB pair combining form are { 1-PRB, 2-PRB, 3-PRB, 4-PRB, 6-PRB, one or more in 8-PRB}.
3. detection method according to claim 2, it is characterized in that, described from original position, according to PRB or PRB pair combining form, be that 1-PRB, 2-PRB, 3-PRB, 4-PRB, 6-PRB or 8-PRB carry out the blind Detecting of same number or different number of times to described PRB or PRB pair respectively.
4. according to the detection method described in claim 2 or 3, it is characterized in that, describedly public search space is carried out to blind Detecting be: at the 1st slot s lot or the 2nd slot of described PRB or PRB pair or on 2 slot, public search space is carried out to blind Detecting simultaneously.
5. detection method according to claim 1, it is characterized in that, when described public search space is comprised of the control channel unit R-CCE of one group of via node, described from described original position, according to different combining forms, public search space is carried out to blind Detecting and be:
From described original position, according to R-CCE combining form, described R-CCE is carried out to blind Detecting respectively, wherein R-CCE combining form is { 1-R-CCE, 2-R-CCE, 4-R-CCE, one or more in 8-R-CCE}.
6. detection method according to claim 5, it is characterized in that, described from original position, according to R-CCE combining form, be that 1-R-CCE, 2-R-CCE, 4-R-CCE, 8-R-CCE carry out the blind Detecting of same number or different number of times to described R-CCE respectively.
7. according to the detection method described in claim 5 or 6, it is characterized in that, describedly public search space is carried out to blind Detecting be: at the 1st slot or the 2nd slot of described R-CCE place subframe or on 2 slot, public search space is carried out to blind Detecting simultaneously.
8. according to the detection method described in claim 2 or 5, it is characterized in that, described method also comprises:
When detecting with system message casual network sign or accidental access response message casual network identifies or beep-page message casual network identifies the schedule information matching, according to the indication of the schedule information matching, on corresponding running time-frequency resource, obtain common control information itself, described common control information comprises at least one in system message, accidental access response message and beep-page message;
Wherein, when described public search space is comprised of one group of PRB or PRB pair, the information of public search space carrying is common control information or schedule information; When described public search space is comprised of one group of R-CCE, the information of public search space carrying is schedule information.
9. a detection system for the public search space of via node, is characterized in that, described system comprises: original position determining unit and blind Detecting unit; Wherein,
Original position determining unit, for when described public search space is comprised of PRB pair one group of Physical Resource Block PRB or Physical Resource Block, determine that the original position that public search space is detected is any PRB or the PRB pair in described one group of PRB or PRB pair; When described public search space is comprised of the control channel unit R-CCE of one group of via node, determine that the original position that public search space is detected is any R-CCE in described one group of R-CCE;
Blind Detecting unit, for from the determined original position of described original position determining unit, carries out blind Detecting according to different combining forms to common search.
10. detection system according to claim 9, it is characterized in that, described blind Detecting unit, specifically for when described public search space is comprised of one group of PRB or PRB pair, from the determined original position of described original position determining unit, carries out blind Detecting according to PRB or PRB pair combining form to described PRB or PRB pair respectively, wherein PRB or PRB pair combining form are { 1-PRB, 2-PRB, 3-PRB, 4-PRB, 6-PRB, one or more in 8-PRB}.
11. detection systems according to claim 9, it is characterized in that, described blind Detecting unit is also for when described public search space is comprised of the control channel unit R-CCE of one group of via node, from the determined original position of described original position determining unit, according to R-CCE combining form, described R-CCE is carried out to blind Detecting respectively, wherein R-CCE combining form is { 1-R-CCE, 2-R-CCE, 4-R-CCE, one or more in 8-R-CCE}.
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| CN201010508880.5A CN102448082B (en) | 2010-10-12 | 2010-10-12 | Method and system for detecting public search space of relay node |
| PCT/CN2011/080703 WO2012048644A1 (en) | 2010-10-12 | 2011-10-12 | Detection method and system for relay node common search space |
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| CN201010508880.5A CN102448082B (en) | 2010-10-12 | 2010-10-12 | Method and system for detecting public search space of relay node |
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| CN101478808A (en) * | 2009-01-21 | 2009-07-08 | 中兴通讯股份有限公司 | Downlink control information sending and detecting method |
| CN101809898A (en) * | 2007-09-28 | 2010-08-18 | Lg电子株式会社 | Wireless communication system for monitoring physical downlink control channel |
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| CN101809898A (en) * | 2007-09-28 | 2010-08-18 | Lg电子株式会社 | Wireless communication system for monitoring physical downlink control channel |
| CN101478808A (en) * | 2009-01-21 | 2009-07-08 | 中兴通讯股份有限公司 | Downlink control information sending and detecting method |
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| Nokia Siemens Networks等.Further Aspects of Control Channel for Relay Backhaul link.《3GPP TSG RAN WG1 Meeting #57bis，R1-092565》.2009,正文第1-3页. * |
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