CN101917729A - Time domain interference indication method and time domain resource interference determination method and base stations thereof - Google Patents
Time domain interference indication method and time domain resource interference determination method and base stations thereof Download PDFInfo
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- CN101917729A CN101917729A CN2010102570938A CN201010257093A CN101917729A CN 101917729 A CN101917729 A CN 101917729A CN 2010102570938 A CN2010102570938 A CN 2010102570938A CN 201010257093 A CN201010257093 A CN 201010257093A CN 101917729 A CN101917729 A CN 101917729A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
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Abstract
The invention relates to a time domain interference indication method and a time domain resource interference determination method and base stations thereof. The indication method comprises the following steps that: a base station determines interference indication information of a time domain resource according to the interference requiring interference indication on the time domain resource, wherein the time domain resource takes subframe as basic units; and the base station sends the interference indication information to an adjacent base station through interference indication signaling. According to the indication method, the base station can indicate the interference condition of the time domain resource to the adjacent base station, so that the adjacent base station coordinates and schedules the resource. The determination method comprises the following step that: a base station determines a time domain resource with number X=g mod H as the time domain resource with smaller interference according to the value g of time domain interference indication information and the set number H of time domain resources after receiving configuration signaling comprising the time domain interference indication information. The method can reduce the interference between adjacent base stations.
Description
Technical field
The present invention relates to the communications field, especially relate to definite method and corresponding system that a kind of time domain disturbs indicating means, time-domain resource to disturb.
Background technology
Long Term Evolution (LTE, Long Term Evolution) radio frames (radio frame) in the system comprises Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplex) frame structure of pattern and time division duplex (TDD, Time Division Duplex) pattern.The frame structure of fdd mode, as shown in Figure 1, the radio frames of 10 milliseconds (ms) is 0.5ms by 20 length, and the time slot (slot) of numbering 0～19 is formed, and it is subframe (subframe) i of 1ms that time slot 2i and 2i+1 form length.
The frame structure of tdd mode, as shown in Figure 2, the radio frames of a 10ms is longly formed for the field of 5ms (half frame) by two, and a field comprises that 5 length are the subframe of 1ms, and subframe i is defined as 2 and longly is time slot 2i and the 2i+1 of 0.5ms.
In above-mentioned two kinds of frame structures, for standard cyclic prefix (Normal CP, Normal Cyclic Prefix), the symbol that it is 66.7 microseconds (us) that time slot comprises 7 length, wherein the CP length of first symbol is 5.21us, and the CP length of all the other 6 symbols is 4.69us; For extended cyclic prefix (Extended CP, Extended Cyclic Prefix), a time slot comprises 6 symbols, and the CP length of all symbols is 16.67us.The T of chronomere
sBe defined as T
s=1/ (15000 * 2048) second; to each subframe in the radio frames; " D " expression is exclusively used in the subframe of downlink transfer; " U " expression is exclusively used in the subframe of uplink; " S " expression is used for the special subframe in DwPTS, protection interval (GP) and these three territories of UpPTS, and their length is obeyed DwPTS, GP and the UpPTS total length is 30720T
s=1ms.Each subframe i is represented that by 2 time slot 2i and 2i+1 each time slot is long to be T
Slot=15360T
s=0.5ms.
LTE TDD supports the up-downgoing switching cycle of 5ms and 10ms.If the downstream-to-upstream transfer point cycle is 5ms, special subframe can be present in two fields; If downstream-to-upstream transfer point cycle 10ms, special subframe only is present in first field.Subframe 0 and subframe 5 and DwPTS always are used for downlink transfer.UpPTS and the subframe of closelying follow behind special subframe are exclusively used in uplink.
The version number of LTE is corresponding to R8 (Release 8), and its version number that increases the version correspondence is R9 (Release 9), and for from now on LTE-Advance, its version number is R10 (Release 10) just.Following three kinds of downlink physical control channels have been defined among the LTE: physical down control format indicating channel (PCFICH, Physical Control Format Indicator Channel); The automatic repeat requests indicating channel of physical mixed (PHICH, Physical Hybrid Automatic Retransmission Request Indicator Channel); Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel).
Wherein, the PCFICH loaded information is used in reference to the OFDM (OFDM that is shown in transmission PDCCH in the subframe, Orthogonal Frequency Division Multiplexing) number of symbol, on first OFDM symbol of subframe, send, (ID Identity) determines the place frequency location by system descending bandwidth and cell ID.
PHICH is used to carry acknowledgement/non-acknowledgement (ACK/NACK) feedback information of uplink transmission data.The number of PHICH, time-frequency position can be determined by system message and the sub-district ID in the Physical Broadcast Channel (PBCH, Physical Broadcast Channel) of the descending carrier at PHICH place.
PDCCH is used for bearing downlink control information (DCI, Downlink Control Information), comprising: uplink and downlink schedule information, and uplink power control information.The form of DCI (DCI format) is divided into following several: DCI format 0, DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format 1D, DCI format 2, DCI format 2A, DCI format 3 and DCI format 3A etc.;
Senior LTE (LTE-Advanced, abbreviating LTE-A as) system is the evolution system of future generation of LTE system, in order to obtain bigger bandwidth, adopted carrier aggregation (Carrier Aggregation) technology, promptly, several continuous component carrier frequency (frequency spectrum) (Component Carrier) that are distributed on difference/similar frequency bands are adopted carrier aggregation (Carrier Aggregation) technology polymerization, form the operable bigger bandwidth of LTE-Advanced.Frequency spectrum for after assembling is divided into n component carrier frequency (frequency spectrum), and the frequency spectrum in each component carrier frequency (frequency spectrum) is continuous.
Produce for having between the neighbor cell that uses same frequency to disturb, at present, the method of eliminating presence of intercell interference in the LTE system comprises that (Inter-Cell InterferenceCoordination, ICIC) method are coordinated to avoid the interference of adjacent area to a kind of Inter-Cell Interference Coordination by frequency domain resource;
Along with Home eNodeB (Home eNB HeNB) introduces, Home eNodeB and macro base station, between the Home eNodeB, and the interference between Microcell and the macrocell is serious all the more; Because Physical Downlink Control Channel is the full bandwidth mapping, so, the disturbance coordination method of frequency domain is also inapplicable, if two neighbor cells transmit on identical subframe, particularly powerful base station is for the interference of low power base station, to cause the down control channel transmission performance to descend, influence the reception of downlink data;
Coordination and time domain frame structure that the present method that proposes is based on component carrier frequency are offset according to the time domain OFDM symbol, thereby, reduce the interference of control channel between neighbor cell, still, do not propose how not carry out the skew of time domain OFDM symbol.And, method based on the component carrier frequency coordination, for single carrier frequency network and inapplicable, and the method for time domain OFDM symbol offset just is converted into interference between down control channel and the downstream data channel to the interference between down control channel, when the downlink data channel power was very strong, down control channel still was subjected to strong jamming.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of time domain and disturbs indicating means and corresponding base station, and disturbed condition on the time-domain resource can be indicated to adjacent base station in the base station, so that adjacent base station carries out the coordinated scheduling of resource.
In order to address the above problem, the invention provides a kind of time domain and disturb indicating means, comprising:
The base station is disturbed the interference on the time-domain resource of indication as required, determines the interference indication information of described time-domain resource, and described time-domain resource is base unit with the subframe;
The base station sends to adjacent base station by disturbing indication signaling with described interference indication information.
Preferably,
Interference on the described time-domain resource comprises: the interference that is subjected on described time-domain resource, and/or the interference that will produce on described time-domain resource.
Preferably,
The unit of described time-domain resource is a subframe, and perhaps, the unit of described time-domain resource is the time-domain resource group that one or more subframes are formed.
Preferably,
The unit of described time-domain resource is a subframe, is one-period with N radio frames, in each cycle k subframe is disturbed indication, wherein, and k=1～k
Max, k
MaxBe all number of sub frames that N radio frames comprises, N is a positive integer.
Preferably,
The unit of described time-domain resource is the time-domain resource group, and each time-domain resource group comprises one or more subframes, a kind of divide of described time-domain resource group in the following manner:
First kind, descending employing synchronous HARQ, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the descending sub frame of each descending process correspondence
Max, wherein, H
MaxFor system is the descending process number of cell configuration;
Second kind, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the descending sub frame of each up process correspondence
Max, wherein, H
MaxFor system is the up process number of cell configuration;
The third, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the sub-frame of uplink of each up process correspondence
Max, wherein, H
MaxFor system is the up process number of cell configuration.
Preferably,
Described base station is disturbed the interference on the time-domain resource of indication as required, when determining the interference indication information of described time-domain resource, is according to interference strength interference to be divided into a plurality of grades, with level of interference as described interference indication information.
Preferably,
It is in the following scene one or more that described base station sends to adjacent base station with described interference indication information:
Little base station sends described interference indication information to adjacent macro base station, the disturbed condition that is used to indicate the terminal of cell edge region under this little base station to be subjected on described time-domain resource;
Home eNodeB sends described interference indication information to adjacent macro base station, is used to indicate the disturbed condition that terminal is subjected on described time-domain resource under the base station, distant relative front yard;
The peritropous Home eNodeB of macro base station and/or little base station send described interference indication information, are used to indicate this macro base station disturbed condition with generation on described time-domain resource;
The peritropous Home eNodeB of macro base station and/or little base station send described interference indication information, are used to indicate this macro base station susceptibility to descending interference on described time-domain resource;
The peritropous family in little base station macro base station sends described interference indication information, is used to indicate this macro base station susceptibility to descending interference on described time-domain resource.
The peritropous Home eNodeB of macro base station and/or little base station send described interference indication information, are used to indicate this macro base station susceptibility to descending interference on described time-domain resource;
The peritropous macro base station in little base station sends described interference indication information, is used to indicate this little base station susceptibility to descending interference on described time-domain resource.
Correspondingly, the time domain of carrying out provided by the invention disturbs the base station of indication to comprise:
Device is determined in interference, is used for disturbing as required the interference that is subjected on the time-domain resource of indication, and/or the interference that will produce on described time-domain resource, determines the interference indication information of described time-domain resource, and described time-domain resource is base unit with the subframe;
Dispensing device is used for by disturbing indication signaling that described interference indication information is sent to adjacent base station.
Preferably,
Described interference determines that device is an one-period with N radio frames, in each cycle k subframe is disturbed indication, wherein, and k=1～k
Max, k
MaxBe all number of sub frames that N radio frames comprises, N is a positive integer.
Preferably,
Described interference determines that device is that unit disturbs indication with the time-domain resource group, and each time-domain resource group comprises one or more subframes, a kind of divide of described time-domain resource group in the following manner:
First kind, descending employing synchronous HARQ, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the descending sub frame of each descending process correspondence
Max, wherein, H
MaxFor system is the descending process number of cell configuration;
Second kind, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the descending sub frame of each up process correspondence
Max, wherein, H
MaxFor system is the up process number of cell configuration;
The third, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the sub-frame of uplink of each up process correspondence
Max, wherein, H
MaxFor system is the up process number of cell configuration.
Disturb indicating means and corresponding base station according to time domain of the present invention, the base station can disturb indication to carry out coordinated scheduling according to the time domain of adjacent base station, control channel between neighbor cell disturbs and the interference problem of data thereby solved, and has guaranteed the throughput and the covering of system.
Another technical problem that the present invention will solve provides definite method that a kind of time-domain resource is disturbed, and can reduce the phase mutual interference between the base station.
In order to address the above problem, the invention provides definite method that a kind of time-domain resource is disturbed, this method comprises:
The base station is received and is comprised the configuration signal that time domain is disturbed indication information;
The quantity H of the time-domain resource of the value g of indication information and setting is disturbed according to time domain in described base station, and the time-domain resource of numbering X=g mod H is defined as and will be subjected to the time-domain resource of less interference.
Preferably,
Described configuration signal is the cell ID configuration signal, and it is cell ID that described time domain is disturbed indication information; Perhaps
Described configuration signal is the core net configuration signal, but to disturb indication information be with the parameter of a numeric representation and a sub-district of unique identification in the core net configuration signal to described time domain.
Preferably,
The time-domain resource of described setting is a unit with the time-domain resource group, and each time-domain resource group comprises one or more subframes, a kind of divide of described time-domain resource group in the following manner:
First kind, descending employing synchronous HARQ, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the descending sub frame of each descending process correspondence
Max, wherein, H
MaxMaximum downstream process number for the sub-district;
Second kind, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the descending sub frame of each up process correspondence
Max, wherein, H
MaxMaximum up process number for the sub-district;
The third, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the sub-frame of uplink of each up process correspondence
Max, wherein, H
MaxMaximum up process number for the sub-district.
Correspondingly, the base station of determining that time-domain resource is disturbed provided by the invention comprises:
Receiving system is used to receive the configuration signal that comprises time domain interference indication information;
Determine device, be used for disturbing the quantity H of the time-domain resource of the value g of indication information and setting, the time-domain resource of numbering X=g mod H is defined as and will be subjected to the time-domain resource of less interference according to time domain.
Preferably,
Described definite device is the value g according to cell ID, and the quantity H of the maximum up process of sub-district and/or descending process determines to be subjected to the numbering of the time-domain resource group of less interference, each time-domain resource group comprises one or more subframes, in the following manner a kind of division the in:
First kind, descending employing synchronous HARQ, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the descending sub frame of each descending process correspondence
Max, wherein, H
MaxMaximum downstream process number for the sub-district;
Second kind, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the descending sub frame of each up process correspondence
Max, wherein, H
MaxMaximum up process number for the sub-district;
The third, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the sub-frame of uplink of each up process correspondence
Max, wherein, H
MaxMaximum up process number for the sub-district.
According to definite method and the corresponding base station that time-domain resource of the present invention is disturbed, the less time-domain resource of interference that will produce can be known in the base station, thereby dispatches coordination accordingly, reduces the phase mutual interference.
Another technical problem that the present invention will solve provides a kind of time domain skew method for determination of amount, can be offset the interference that reduces between adjacent base station by time domain.
In order to address the above problem, the invention provides a kind of time domain skew method for determination of amount, comprising:
Configuration signal is received in the base station, this configuration signal comprise with numeric representation can the unique identification sub-district parameter g;
Described base station is determined time domain side-play amount Offset:Offset=g mod R according to the time domain maximum offset R of described parameter g and configuration by following formula, and the unit of R is a subframe.
Preferably, described parameter g is a cell ID.
Preferably, described R can be the maximum process number of cell configuration for system, and described process is up process and/or descending process.
Time domain skew method for determination of amount of the present invention can be offset the interference that reduces between adjacent base station by time domain.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the frame structure schematic diagram of fdd mode in the prior art;
Fig. 2 is the frame structure schematic diagram of tdd mode in the prior art;
Fig. 3 is the flow chart of the embodiment of the invention one method;
Fig. 4 is the flow chart of the embodiment of the invention three methods.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Embodiment one
Present embodiment has defined a kind of time domain and has disturbed indication signaling, is used to indicate the disturbed condition of time-domain resource.The base station disturbs indication to carry out scheduling of resource according to time domain, thereby the control channel between the solution neighbor cell disturbs and the interference problem of data.
The flow process of present embodiment method comprises as shown in Figure 3:
In the present embodiment, the unit of time-domain resource is a subframe.As can N radio frames being one-period, in each cycle k subframe disturbed indication, wherein, k=1～k
Max, k
MaxBe all number of sub frames that N radio frames comprises, N is a positive integer, as being 1,2,3,4 etc.
The subframe that need disturb indication can be to select the subframe of bearing system message or beep-page message, also can select according to the corresponding relation of each process and subframe etc.
In one example, the interference that is subjected on the time-domain resource can detect by the signal to other signal sources on this time-domain resource (as terminal, adjacent base station) and obtain.The interference that will produce on the time-domain resource can be determined according to the signal that this base station will send on this time-domain resource.
Can interference be divided into a plurality of grades according to interference strength, the interference strength in the corresponding certain limit of each grade is with the indication information of level of interference as interference that will produce and/or the interference that is subjected to.
During concrete indication, each need disturb the subframe of indication can corresponding n bit, and this n bit can represent 2
nPlant level of interference.Like this, being used to indicate the signaling consumption of the interference that is subjected on the time-domain resource is n * k, is used to indicate the signaling consumption of the interference that will produce on the time-domain resource also to be n * k, and n is a positive integer.
Time domain interference indication signaling can be mutual between adjacent base station by X2 interface.
Need to disturb the interference indication information of k subframe of indication in the one-period, can disturb indication signaling to send, also can be divided into a plurality of time domains and disturb indication signalings to send by a time domain.As, when N=2, can disturb indication signaling to carry the interference indication information of a described k subframe by a time domain, also can disturb indication signaling to carry by 2 time domains, promptly each time domain disturbs indication signaling only to carry the time domain interference indication information of k/2 subframe on each radio frames.
Know that how carrying out scheduling of resource the present invention behind the disturbed condition on the time-domain resource is not limited, and can adopt existing various scheduling strategy.For example, can disturb the indication situation according to the time domain of neighbor cell, the base station can be with the terminal priority scheduling that is positioned at cell edge region to disturbing on the less subframe, and the terminal priority scheduling that will be positioned at cell inner area is to disturbing on the bigger subframe.
Correspondingly, present embodiment also provides a kind of base station that time domain is disturbed indication of carrying out, and comprising:
Device is determined in interference, is used for disturbing as required the interference that is subjected on the time-domain resource of indication, and/or the interference that will produce on described time-domain resource, determines the interference indication information of described time-domain resource, and described time-domain resource is base unit with the subframe;
Dispensing device is used for by disturbing indication signaling that described interference indication information is sent to adjacent base station.
Further,
Described interference determines that device is an one-period with N radio frames, in each cycle k subframe is disturbed indication, wherein, and k=1～k
Max, k
MaxBe all number of sub frames that N radio frames comprises, N is a positive integer.
Further,
Described interference determines that device is that unit disturbs indication with the time-domain resource group, and each time-domain resource group comprises one or more subframes, and described time-domain resource group is divided by above-mentioned 3 kinds of modes.
Below the several examples based on embodiment one are described.
Example one
This example is 1 cycle with 1 radio frames, and all subframes in each radio frames are disturbed indication.Time domain disturbs indication signaling to comprise two parts, and a part is used to indicate the disturbed condition that is subjected on each subframe (10), corresponding 1 bit of each subframe, as, to represent not to be interfered with 0,1 expression is disturbed; Another part is used in reference to the disturbed condition that is shown on each subframe producing, corresponding 1 bit of each subframe, as, represent not produce interference with 0,1 expression produces interference.
Example two
This example is 1 cycle with 1 radio frames, and (#6 #9) disturbs indication for #0, #5 to 4 subframes in each radio frames.Time domain disturbs indication signaling to comprise two parts, and a part is used to indicate the situation of the interference that is subjected on these 4 subframes, and corresponding 2 bits of each subframe are represented four kinds of annoyance levels respectively, for example: " by force ", " in ", " gently " and " nothing ".Another part is used in reference to the situation that is shown in the interference that will produce on these 4 subframes, and corresponding 2 bits of each subframe are represented four kinds of annoyance levels respectively, for example: " by force ", " in ", " gently " and " nothing ".
Embodiment two
Present embodiment is compared with embodiment one, and the time-domain resource that disturb indication is to be unit with the time-domain resource group.And the time-domain resource group is base unit with the subframe, and each time-domain resource group comprises one or more subframes.
The time-domain resource group of present embodiment is divided by the subframe of process correspondence, as can be in the following mode a kind of:
First kind, descending employing synchronous HARQ, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the descending sub frame of each descending process correspondence
Max, wherein, H
MaxFor system is the descending process number of cell configuration;
Second kind, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the descending sub frame of each up process correspondence
Max, wherein, H
MaxFor system is the up process number of cell configuration;
The third, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the sub-frame of uplink of each up process correspondence
Max, wherein, H
MaxFor system is the up process number of cell configuration.
In agreement, process is to be the entity of the expression carrying transmission block of cell configuration, and a transmission block transmits on the subframe of a process correspondence, and a transport block transmission finishes another new transmission block of back and can continue transmission in process.For asynchronous HARQ, re-transmission of blocks can be transmitted on different processes with the first piece that passes, and for synchronous HARQ, re-transmission of blocks and the first piece that passes transmit on same process.The descending sub frame of up process correspondence is meant the descending sub frame of the ACK/NACK information of the up process of transmission, the descending sub frame of descending process correspondence is meant the descending sub frame of the downstream transmission blocks of the descending process carrying of transmission, the sub-frame of uplink of up process correspondence is meant the sub-frame of uplink of the uplink transmission block of the up process carrying of transmission, and concrete corresponding relation can be with reference to related protocol.Present embodiment is that unit disturbs indication with the subframe of process correspondence, and is better for the compatibility of system.
In the present embodiment, the base station is according to the interference that is subjected on the described time-domain resource, and/or the interference that on described time-domain resource, will produce, when determining the interference indication information of described time-domain resource, also can be with the indication information of level of interference as interference that will produce and/or the interference that is subjected to, in time domain was disturbed indication signaling, each time-domain resource group can corresponding n bit, can represent 2
nPlant level of interference.
When the base station disturbs indication signaling that the interference indication information of described time-domain resource is sent to adjacent base station by time domain, a time domain disturbs indication signaling can carry the time domain interference indication information of the one or more subframes in each time-domain resource group, perhaps carries the time domain of the one or more subframes in the part time-domain resource group and disturbs indication information.
The interference indication information that the base station sends according to adjacent base station carries out the method for scheduling of resource can be identical with embodiment one, no longer repeats.
Below the several examples based on embodiment two are described.
Example one
In this example, divide the time-domain resource group by the descending sub frame of up process correspondence.Up process i begins transmission from sub-frame of uplink n, the descending sub frame of this up process correspondence be numbered n+4+M*q, each descending sub frame of same up process correspondence constitutes a time-domain resource group, wherein, q is 0 and positive integer, M is up process number.
Suppose that up process number is 8, up process 0 to 7 begins transmission from sub-frame of uplink 0 to 7 respectively, and the descending sub frame with 8 up process correspondences is divided into 8 time-domain resource groups respectively in a manner described.As, the descending sub frame of up process 0 correspondence is 4+8q, q is 0 and positive integer.
Corresponding 1 bit of each subframe in the time-domain resource group, be used to represent level of interference on this subframe, as " having " and " nothing ", if the grade of the interference that the descending sub frame that each time domain disturbs denoting signaling to belong to different time domain resource group is subjected to, then the expense of this time domain interference signaling is 8 bits, if will be illustrated in the grade of the interference that will produce on these 8 subframes simultaneously, then overhead is 16 bits.
Example two
In this example, descending sub frame adopts the synchronous HARQ process, presses the descending sub frame of the journey correspondence of advancing and divides the time-domain resource group.Descending process i begins transmission from descending sub frame n, and the descending sub frame of this descending process correspondence is numbered n+M*q, and each descending sub frame of same descending process correspondence constitutes a time-domain resource group, and wherein, q is 0 and positive integer, and M represents descending process number.
Suppose that descending process number is 8, descending process 0 to 7 begins transmission from descending sub frame 0 to 7 respectively, descending sub frame with 8 descending process correspondences is divided into 8 time-domain resource groups respectively in a manner described, and following descending sub frame of advancing journey 0 correspondence is 8q, and q is 0 and positive integer.
The example one that indication that time domain is disturbed and expense please refer to present embodiment no longer repeats.
Need to prove that in the time of will disturbing the time-domain resource of indication to be unit with the time-domain resource group, the time-domain resource group is not limited to the mode of dividing by the subframe of process correspondence.For example, can N radio frames be one-period also, with the some or all sub-frame division in N the radio frames is H time-domain resource group, a time-domain resource group can comprise one or more subframes, the disturbed condition of the H in each cycle time-domain resource group can disturb indication signaling to indicate by one or more time domains, wherein, N, H is positive integer.
Embodiment three
Present embodiment is different with embodiment one and two, and the time domain of present embodiment disturbs indication signaling to be included in the existing configuration signal, utilizes in the described configuration signal parameter with numeric representation as the indication parameter that is used for definite time-domain resource disturbed condition.
The flow process of present embodiment method comprises as shown in Figure 4:
Step 210, base station are received and are comprised the cell ID configuration signal that time domain is disturbed indication information;
The cell ID configuration signal of present embodiment does not need to change, just utilized cell ID wherein to determine the interference that will on time-domain resource, will produce, the indication information that cell ID disturbs as a kind of time domain simultaneously, this indication information have constituted time domain and have disturbed indication signaling.
In other embodiments, time domain disturbs indication signaling can also be included in other existing configuration signals as the core net configuration signal, can be with Location Area Code in the core net configuration signal (LAC) or service area identification code parameters such as (SAC), as the indication information of determining the time-domain resource disturbed condition.Need to prove that described parameter should be with numeric representation, and can sub-district of unique identification.
Step 220, base station are according to the quantity of the time-domain resource of time domain interference indication information and setting, by calculating the disturbed condition of determining on the described time-domain resource;
The unit of present embodiment time-domain resource is the time-domain resource group, divides by the subframe of process correspondence, and as adopting 3 kinds of dividing mode describing among the embodiment two, the quantity of the time-domain resource of setting equals the quantity of time-domain resource group.The value of supposing cell ID is g, and the quantity of time-domain resource group is H, is numbered 0～H-1, then has: the base station is by calculating the numbering X=g modH of definite time-domain resource group that will be subjected to less interference.
The situation of the interference that will produce on each time-domain resource is represented with the relative size of disturbing, as representing with above-mentioned level of interference.
In other embodiments, also can adopt other dividing mode to obtain the time-domain resource group, perhaps, also can adopt other time-domain resource unit, as subframe.
Step 230, base station are carried out scheduling of resource with the disturbed condition that produces according to what determine on each time-domain resource.
Similarly, the base station can be with the terminal priority scheduling that is positioned at cell edge region on the less subframe of the interference that will produce, and the terminal priority scheduling that will be positioned at cell inner area is on the bigger subframe of the interference that will produce.
Correspondingly, present embodiment provides a kind of base station of determining that time-domain resource is disturbed, comprising:
Receiving system is used to receive the configuration signal that comprises time domain interference indication information;
Determine device, be used for disturbing the quantity H of the time-domain resource of the value g of indication information and setting, the time-domain resource of numbering X=g mod H is defined as and will be subjected to the time-domain resource of less interference according to time domain.
Further,
Described definite device is the value g according to cell ID, and the quantity H of the maximum up process of sub-district and/or descending process determines to be subjected to the numbering of the time-domain resource group of less interference, each time-domain resource group comprises one or more subframes, can divide by above-mentioned 3 kinds of modes.
Below the example based on embodiment three is described.
Example one
In this example, the time-domain resource group is divided by the subframe of process correspondence, is divided into H time-domain resource group altogether, by 0～H-1 numbering.Dividing mode is a kind of in following several mode:
First kind, descending employing synchronous HARQ, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the descending sub frame of each descending process correspondence
Max, wherein, H
MaxMaximum downstream process number for the sub-district;
Second kind, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the descending sub frame of each up process correspondence
Max, wherein, H
MaxMaximum up process number for the sub-district;
The third, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the sub-frame of uplink of each up process correspondence
Max, wherein, H
MaxMaximum up process number for the sub-district.
Suppose that the value as the cell ID of indication information is g, then the numbering X=g mod H of the time-domain resource group that will be subjected to less interference of Que Dinging.
For example, up number of processes is 8, up process 0 to 7 begins transmission from sub-frame of uplink 0 to 7 respectively, 8 time-domain resource groups of corresponding downstream sub-frame division, the value of cell ID is g, then, the base station acquiescence will be subjected to the numbering X=g mod 8 of the time-domain resource group of less interference, it is less also promptly to give tacit consent to the interference that is subjected on the descending sub frame of up process X correspondence, can be on these subframes with the terminal priority scheduling that is positioned at cell edge region, the terminal priority scheduling that will be positioned at cell inner area is on the subframe that does not belong to time-domain resource group X.
The cell ID of adjacent base station is to concern according to mutual position to dispose, adjacent base station is generally different according to the numbering of the time-domain resource group that will be subjected to less interference that following formula calculates, by with cell edge region terminal priority scheduling to the time-domain resource group stagger, can reduce mutual interference.
The time-domain resource group is by the sub-frame of uplink of up process correspondence, or the situation that the descending process of descending process correspondence is divided is similarly, no longer repeats.
Embodiment four
Identical with embodiment three, the time domain of present embodiment disturbs indication signaling to be included in existing configuration signal such as cell ID configuration signal, the core net configuration, but utilize in the described configuration signal parameter with numeric representation and unique identification sub-district as the indication information that is used for determining the time domain side-play amount, present embodiment is a cell ID.
Supposing that the time domain maximum offset of base station configuration is R, is unit with the subframe, and the base station corresponding district is designated R, then has:
The time domain side-play amount of base station is Offset=g mod R.
Wherein, R can be when the network planning manual configuration, also can obtain by configuration signal.Can be a fixed value, perhaps be the maximum process number of sub-district, perhaps disturbs number of sub frames of indication signaling indication or the like for time domain.Adjacent base station is generally different according to the side-play amount that following formula calculates, thereby can reduce mutual interference.
Need to prove that the time domain offset method of embodiment four can adopt separately, also can disturb indication and corresponding dispatching method to adopt simultaneously with the time domain of embodiment one, embodiment two and embodiment three.
Embodiment five
It is resource coordination between the different classes of base station that present embodiment adopt to divide a two-layer resource coordination method of carrying out, ground floor, and the second layer is the resource coordination between the base station of same classification.
Resource coordination between the different classes of base station adopts the method for grouping, with resource division is N different resource group, N equals to carry out the classification number of the base station of resource coordination, the base station of each classification is corresponding to a resource group, and the resource of this resource group correspondence is the resource group of probability minimum of being interfered in all resources of base station.For example, can with resource division 3 different resource groups, correspond respectively to macro base station, little base station and Home eNodeB.
Further, the corresponding resource group in same classification base station (as in macro base station, little base station and the Home eNodeB one or more) can be divided into groups not corresponding on the same group resource difference once more.
Dispatch as required according to the resource of the group correspondence at its place the base station.As disturbing indication signaling and/or frequency domain interference indication signaling to carry out resource coordination according to time domain.Described frequency domain interference indication signaling can be to be the interference indication of unit with the component carrier frequency, also can be to be the interference indication of unit with subband (m continuous resource piece); Described time domain disturbs indication can represent the disturbed condition of subframe or time-domain resource group, shown in above-mentioned embodiment one to three.
Embodiment six
Present embodiment adopts the resource coordination method of individual layer, Home eNodeB is divided into groups not corresponding on the same group different resource.In the limited deployment scenario of Home eNodeB, such as can dividing into groups according to floor in the building building, perhaps, and according to the room number grouping, if office building, also can be according to each angle, building grouping of deployed position etc.
Home eNodeB is dispatched as required according to the resource of the group correspondence at its place.As disturbing indication signaling and/or frequency domain interference indication signaling to carry out resource coordination according to time domain.Described frequency domain interference indication signaling can be to be the interference indication of unit with the component carrier frequency, also can be to be the interference indication of unit with subband (m continuous resource piece); Described time domain disturbs indication can represent the disturbed condition of subframe or time-domain resource group, shown in above-mentioned embodiment one to three.
The resource coordination method of above-mentioned individual layer also can be used for little base station.
Embodiment seven
The scene that above-mentioned each embodiment disturbs indication signaling to carry out resource coordination according to time domain can be in the following scene one or more, and these scenes also are applicable to the scene of carrying out resource coordination according to the frequency domain interference indication signaling:
Little base station sends described interference indication information to adjacent macro base station, the disturbed condition that is used to indicate the terminal of cell edge region under this little base station to be subjected on described time-domain resource; Macro base station is dispatched coordination according to the described disturbed condition that little base station sends;
Home eNodeB sends described interference indication information to adjacent macro base station, is used to indicate the disturbed condition that terminal is subjected on described time-domain resource under the base station, distant relative front yard; Macro base station is dispatched coordination according to the disturbed condition that Home eNodeB sends;
The peritropous Home eNodeB of macro base station and/or little base station send described interference indication information, be used to indicate this macro base station disturbed condition with generation on described time-domain resource, coordination is dispatched according to the disturbed condition that macro base station sends in Home eNodeB and/or little base station;
The peritropous Home eNodeB of macro base station and/or little base station send described interference indication information, be used to indicate this macro base station susceptibility to descending interference on described time-domain resource, time-domain resource scheduling UE or attenuating transmitting power that Home eNodeB and/or little base station should be avoided in high interference as far as possible.
The peritropous family in little base station macro base station sends described interference indication information, is used to indicate this macro base station susceptibility to descending interference on described time-domain resource, time-domain resource scheduling UE or attenuating transmitting power that macro base station should be avoided in high interference as far as possible.
The base station obtains disturbed condition on the time-domain resource, as being:
Little base station and Home eNodeB can detect the SRS and/or the RACH signal of the terminal of macro base station, judge the disturbed condition of macro base station terminal to oneself, dispatch coordination.Also can send to macro base station to detected disturbed condition, so that macro base station is dispatched coordination.
The CSI-RS or the CRS of adjacent base station can also be monitored in the base station, and the disturbed condition that obtains to be subjected to is dispatched coordination, also can send to adjacent base station to detected disturbed condition.
In sum, by the above embodiment of the present invention, define a kind of time domain and disturbed indicating means, the base station disturbs indication to carry out coordinated scheduling according to time domain, control channel between neighbor cell disturbs and the interference problem of data thereby solved, and has guaranteed the throughput and the covering of system.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to finish by program, described program can be stored in the computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize, correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a time domain is disturbed indicating means, comprising:
The base station is disturbed the interference on the time-domain resource of indication as required, determines the interference indication information of described time-domain resource, and described time-domain resource is base unit with the subframe;
The base station sends to adjacent base station by disturbing indication signaling with described interference indication information.
2. the method for claim 1 is characterized in that:
Interference on the described time-domain resource comprises: the interference that is subjected on described time-domain resource, and/or the interference that will produce on described time-domain resource.
3. method as claimed in claim 1 or 2 is characterized in that:
The unit of described time-domain resource is a subframe, and perhaps, the unit of described time-domain resource is the time-domain resource group that one or more subframes are formed.
4. method as claimed in claim 1 or 2 is characterized in that:
The unit of described time-domain resource is a subframe, is one-period with N radio frames, in each cycle k subframe is disturbed indication, wherein, and k=1～k
Max, k
MaxBe all number of sub frames that N radio frames comprises, N is a positive integer.
5. method as claimed in claim 1 or 2 is characterized in that:
The unit of described time-domain resource is the time-domain resource group, and each time-domain resource group comprises one or more subframes, a kind of divide of described time-domain resource group in the following manner:
First kind, descending employing synchronous HARQ, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the descending sub frame of each descending process correspondence
Max, wherein, H
MaxFor system is the descending process number of cell configuration;
Second kind, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the descending sub frame of each up process correspondence
Max, wherein, H
MaxFor system is the up process number of cell configuration;
The third, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the sub-frame of uplink of each up process correspondence
Max, wherein, H
MaxFor system is the up process number of cell configuration.
6. the method for claim 1 is characterized in that:
Described base station is disturbed the interference on the time-domain resource of indication as required, when determining the interference indication information of described time-domain resource, is according to interference strength interference to be divided into a plurality of grades, with level of interference as described interference indication information.
7. as claim 1 or 2 or 6 described methods, it is characterized in that it is in the following scene one or more that described base station sends to adjacent base station with described interference indication information:
Little base station sends described interference indication information to adjacent macro base station, the disturbed condition that is used to indicate the terminal of cell edge region under this little base station to be subjected on described time-domain resource;
Home eNodeB sends described interference indication information to adjacent macro base station, is used to indicate the disturbed condition that terminal is subjected on described time-domain resource under the base station, distant relative front yard;
The peritropous Home eNodeB of macro base station and/or little base station send described interference indication information, are used to indicate this macro base station disturbed condition with generation on described time-domain resource;
The peritropous Home eNodeB of macro base station and/or little base station send described interference indication information, are used to indicate this macro base station susceptibility to descending interference on described time-domain resource;
The peritropous family in little base station macro base station sends described interference indication information, is used to indicate this macro base station susceptibility to descending interference on described time-domain resource;
The peritropous Home eNodeB of macro base station and/or little base station send described interference indication information, are used to indicate this macro base station susceptibility to descending interference on described time-domain resource;
The peritropous macro base station in little base station sends described interference indication information, is used to indicate this little base station susceptibility to descending interference on described time-domain resource.
8. definite method of disturbing of a time-domain resource, this method comprises:
The base station is received and is comprised the configuration signal that time domain is disturbed indication information;
The quantity H of the time-domain resource of the value g of indication information and setting is disturbed according to time domain in described base station, and the time-domain resource of numbering X=g mod H is defined as and will be subjected to the time-domain resource of less interference.
9. method as claimed in claim 8 is characterized in that:
Described configuration signal is the cell ID configuration signal, and it is cell ID that described time domain is disturbed indication information; Perhaps
Described configuration signal is the core net configuration signal, but to disturb indication information be with the parameter of a numeric representation and a sub-district of unique identification in the core net configuration signal to described time domain.
10. method as claimed in claim 8 or 9 is characterized in that:
The time-domain resource of described setting is a unit with the time-domain resource group, and each time-domain resource group comprises one or more subframes, a kind of divide of described time-domain resource group in the following manner:
First kind, descending employing synchronous HARQ, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the descending sub frame of each descending process correspondence
Max, wherein, H
MaxMaximum downstream process number for the sub-district;
Second kind, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the descending sub frame of each up process correspondence
Max, wherein, H
MaxMaximum up process number for the sub-district;
The third, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the sub-frame of uplink of each up process correspondence
Max, wherein, H
MaxMaximum up process number for the sub-district.
11. one kind can be carried out the base station that time domain is disturbed indication, it is characterized in that, comprising:
Device is determined in interference, is used for disturbing as required the interference that is subjected on the time-domain resource of indication, and/or the interference that will produce on described time-domain resource, determines the interference indication information of described time-domain resource, and described time-domain resource is base unit with the subframe;
Dispensing device is used for by disturbing indication signaling that described interference indication information is sent to adjacent base station.
12. base station as claimed in claim 11 is characterized in that:
Described interference determines that device is an one-period with N radio frames, in each cycle k subframe is disturbed indication, wherein, and k=1～k
Max, k
MaxBe all number of sub frames that N radio frames comprises, N is a positive integer.
13. base station as claimed in claim 11 is characterized in that:
Described interference determines that device is that unit disturbs indication with the time-domain resource group, and each time-domain resource group comprises one or more subframes, a kind of divide of described time-domain resource group in the following manner:
First kind, descending employing synchronous HARQ, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the descending sub frame of each descending process correspondence
Max, wherein, H
MaxFor system is the descending process number of cell configuration;
Second kind, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the descending sub frame of each up process correspondence
Max, wherein, H
MaxFor system is the up process number of cell configuration;
The third, as a time-domain resource group, need disturb the time-domain resource group number of indication is H, H=1～H with the sub-frame of uplink of each up process correspondence
Max, wherein, H
MaxFor system is the up process number of cell configuration.
14. the base station that can determine that time-domain resource is disturbed is characterized in that, comprising:
Receiving system is used to receive the configuration signal that comprises time domain interference indication information;
Determine device, be used for disturbing the quantity H of the time-domain resource of the value g of indication information and setting, the time-domain resource of numbering X=g mod H is defined as and will be subjected to the time-domain resource of less interference according to time domain.
15. base station as claimed in claim 14 is characterized in that:
Described definite device is the value g according to cell ID, and the quantity H of the maximum up process of sub-district and/or descending process determines to be subjected to the numbering of the time-domain resource group of less interference, each time-domain resource group comprises one or more subframes, in the following manner a kind of division the in:
First kind, descending employing synchronous HARQ, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the descending sub frame of each descending process correspondence
Max, wherein, H
MaxMaximum downstream process number for the sub-district;
Second kind, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the descending sub frame of each up process correspondence
Max, wherein, H
MaxMaximum up process number for the sub-district;
The third, as a time-domain resource group, the time-domain resource group number of setting is H, H=1～H with the sub-frame of uplink of each up process correspondence
Max, wherein, H
MaxMaximum up process number for the sub-district.
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| PCT/CN2010/080407 WO2012019413A1 (en) | 2010-08-13 | 2010-12-28 | Time domain interference indication method, time domain resources interference determination method and base station thereof |
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| Publication number | Publication date |
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| WO2012019413A1 (en) | 2012-02-16 |
| CN101917729B (en) | 2016-04-13 |
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