CN104202823B - A kind of configuration ABS method and device - Google Patents
A kind of configuration ABS method and device Download PDFInfo
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- CN104202823B CN104202823B CN201410326841.1A CN201410326841A CN104202823B CN 104202823 B CN104202823 B CN 104202823B CN 201410326841 A CN201410326841 A CN 201410326841A CN 104202823 B CN104202823 B CN 104202823B
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Abstract
The present invention relates to digital communication technology field, the embodiment of the present invention provides a kind of configuration ABS method and device, to solve the problems, such as the down channel serious interference of prior art user in expansion area.This method includes：Base station determines the priority of the descending sub frame according to the information carried on the type of descending sub frame and the descending sub frame；The base station configures ABS according to almost blank subframe ABS number and the priority of the descending sub frame.By the method for the embodiment of the present invention, the interference of user in expansion area in heterogeneous network can be effectively reduced.
Description
Technical field
The present invention relates to digital communication technology field, more particularly to a kind of configuration ABS method and device.
Background technology
In LTE (Long term evolution, Long Term Evolution) wireless communication system, heterogeneous network is introduced.Heterogeneous network
Network refers to can dispose macro base station (macro eNB) and low power base station simultaneously in same cell.Wherein low power base station includes
Long-distance radio frequency unit, femto base station (pico eNB), Home eNodeB (Home eNB), relay base station (relay eNB) etc..Low work(
Rate base station can be used for hot spot region, interior, blind spot region or the cell edge of coverage cell, and it is average, small can to lift cell
Area edge user throughput etc..In heterogeneous network, in order to improve the availability of frequency spectrum of system as far as possible, usual macro base station and
Low power base station can configure identical frequency spectrum resource, result in produce between macro base station and low power base station and interfere.
When low power base station is deployed in macro base station, it is disturbed than more serious user distribution in cell extension (CRE) area
Domain, as Fig. 1 describes the situation that femto base station is deployed in macro base station cell coverage area, the wherein user C of shadow region and
User D is distributed in expansion area, by serious interference.After UE (User Equipment, user equipment) enters expansion area, sentencing
When disconnecting enters macrocell or picocell, in the signal RSRP from picocellpicoOne offset (bias) of upper increase,
Bias is positive number, and is configured by upper layer device under normal circumstances.RSRPpicoAfter upper increase bias with from macrocell
Signal intensity RSRPmacroCompare, if RSRPpico+bias≥RSRPmacro, then UE selection access picocell；Otherwise, UE is selected
Select access macrocell.
The user in extended area is can be seen that from above-mentioned user mode access, the signal of the macrocell received is strong
Degree is more than the signal intensity of the picocell received, and therefore, the interference that this certain customers is subject to is than more serious, so as to its performance
With regard to poor, the handling capacity of system further have impact on.
Solve the interference problem in heterogeneous network using the enhanced interference coordination technique of time domain at present, introduce in the art
ABS (Almost Blank Subframe, almost blank subframe) concept.ABS refer mainly to macro base station in some subframes only
Public reference signal and common signal channel are sent, and low power base station is handled in subframe corresponding with ABS and is disturbed than more serious
User data message, thus can substantially mitigate the interference between different base station.
After ABS is introduced, macro base station needs to be determined how to configure ABS in radio frames, in the prior art, low-power base
Standing-meeting will be disturbed stronger subframe and feed back to macro base station, and subframe corresponding to the subframe that macro base station feeds back low power base station is set
For ABS, it can thus reach the purpose for reducing interference.This to feed back to macro base station by low power base station, macro base station is again
The method for determining ABS by the feedback information of reception can not effectively solve the problems, such as interference.Because if exist multiple low
During power base station, it presently, there are multiple low power base station such cases and often occur, due to residing for each low power base station
Region and be disturbed user send data time it is all different, so cause macro base station receiving multiple low power base stations
Feedback when, ABS configuring conditions needed for each low power base station are different, therefore macro base station can only be protected preferentially when configuring ABS
A card part is disturbed that user is interference-free, and other users still can be interfered.
In summary, it is that ABS is configured according to passive feedback information in existing scheme, causes low power base station to expand
The down channel serious interference of user in exhibition section.
The content of the invention
The embodiment of the present invention provides a kind of configuration ABS method and device, to solve prior art in expansion area
The problem of down channel serious interference of middle user.
A kind of configuration ABS provided in an embodiment of the present invention method, including：
Base station determines the priority of the subframe according to the information carried in the type of subframe and the subframe；
The base station configures ABS according to the almost priority of blank subframe ABS number and the subframe.
Preferably, the base station determines the excellent of the subframe according to the information carried in the type of subframe and the subframe
First level, including：
The base station determines that the priority of the subframe is followed successively by from high to low, will not carry uplink scheduling information and system
Information broadcast SIB1 descending sub frame priority is set to the first priority；
The special subframe priority for not carrying uplink scheduling information and SIB1 is set to the second priority；
The descending sub frame priority for carrying SIB1 is set to third priority；
The descending sub frame priority for carrying uplink scheduling information is set to the 4th priority；
The special subframe priority for carrying uplink scheduling information is set to the 5th priority.
Preferably, the base station configures ABS according to the almost priority of blank subframe ABS number and the subframe,
Including：
The base station selects the subframe as ABS according to the priority of the subframe successively from high to low, if same excellent
The number of sub-frames of first level is more than in the priority it needs to be determined that number of sub-frames for ABS, then in the subframe of the priority with
Machine is determined as ABS subframe.
Preferably, the base station configures ABS according to the almost priority of blank subframe ABS number and the subframe,
Including：
The base station selects the subframe as ABS according to the priority of the subframe successively from high to low, if same excellent
The number of sub-frames of first level is more than in the priority number of sub-frames it needs to be determined that for ABS, then the subframe in the priority
Number and position in the radio frames in ABS bit map cycles, the subframe for being defined as ABS in the priority is uniformly distributed
In the ABS bit maps cycle.
The embodiment of the present invention provides a kind of configuration ABS device, and the device includes：
Priority determining unit, the information carried in the type according to subframe and the subframe determine the subframe
Priority；
Almost blank subframe determining unit, for according to the preferential of almost blank subframe ABS number and the subframe
Level configuration ABS.
Preferably, the priority determining unit is used for：
Determine that the priority of the subframe is followed successively by from high to low, uplink scheduling information and system information broadcast will not be carried
SIB1 descending sub frame priority is set to the first priority；
The special subframe priority for not carrying uplink scheduling information and SIB1 is set to the second priority；
The descending sub frame priority for carrying SIB1 is set to third priority；
The descending sub frame priority for carrying uplink scheduling information is set to the 4th priority；
The special subframe priority for carrying uplink scheduling information is set to the 5th priority.
Preferably, the almost blank subframe determining unit is used for：
The subframe as ABS is selected successively from high to low according to the priority of the subframe, if the son of same priority
Frame number is more than in the priority number of sub-frames it needs to be determined that for ABS, then ABS number as needed is in the priority
ABS subframe is determined as in subframe at random.
Preferably, the almost blank subframe determining unit is used for：
The subframe as ABS is selected successively from high to low according to the priority of the subframe, if the son of same priority
Frame number is more than in the priority number of sub-frames it needs to be determined that for ABS, then the subframe in the priority is in ABS bits
The number in the radio frames in cycle and position are mapped, the subframe for being defined as ABS in the priority is evenly distributed on the ABS
In the bit map cycle.
The method provided according to embodiments of the present invention, the information that base station carries according to the type and subframe of subframe determine subframe
Priority, ABS subframe is determined as according to the priority of subframe after the ABS quantity of needs is determined.Base station exists
Confirm that the subframe as ABS can notify other base stations in its coverage, so other base stations just by X2 interface afterwards
It can dispatch according to base station ABS in its radio frames configuration mode and access being disturbed under serious user in its cell
Row channel.The overall performance of system can be improved using technical scheme proposed by the present invention.
Brief description of the drawings
Fig. 1 is the schematic diagram of a scenario that macro base station is disposed jointly with femto base station；
Fig. 2 is a kind of configuration ABS method flow diagram provided in an embodiment of the present invention；
Fig. 3 is ascending-descending subframes distribution map when ascending-descending subframes configuration ratio is 2；
Fig. 4 be ascending-descending subframes configuration than for 2 when each subframe priority ranking figure；
Fig. 5 is the distribution situation when ABS of varying number is configured when ascending-descending subframes configuration ratio is 2；
Fig. 6 is a kind of configuration ABS structure drawing of device provided in an embodiment of the present invention.
Embodiment
The information that base station carries according to the type and subframe of subframe in the embodiment of the present invention determines the priority of subframe, true
ABS subframe is determined as after the quantity for the ABS for having determined to need according to the priority of subframe.Base station is confirming as ABS
Subframe after be notified that other base stations in its coverage, so as to low power base station dispatch access in its cell be disturbed it is tight
Reuse the down channel at family.
The embodiment of the present invention is described in detail with reference to Figure of description.
As shown in Fig. 2 a kind of configuration ABS provided in an embodiment of the present invention method flow diagram, this method include：
Step 201：Base station determines the preferential of the subframe according to the information carried in the type of subframe and the subframe
Level；
Step 202：The base station configures ABS according to the almost priority of blank subframe ABS number and the subframe.
The information that base station carries according to the type and subframe of subframe in the embodiment of the present invention determines the priority of subframe, the base
It can be that macro base station can also be low power base station to stand, and wherein low power base station includes long-distance radio frequency unit, femto base station, family
Base station, relay base station etc..If the base station is macro base station, ABS configuration informations are notified into low power base station, if the base station is
Low power base station, then ABS configuration informations are notified into macro base station.
Each radio frames generally comprise the subframe of three types, are respectively：Sub-frame of uplink, descending sub frame and special subframe,
Each type of subframe can carry different information.Due to the embodiment of the present invention consider be down channel interference problem, institute
Only to carry out priority setting to descending sub frame and special subframe.Base station has many when the priority to subframe is configured
Kind method, special subframe can be set to highest priority, or the priority of the descending sub frame of uplink scheduling information will be carried
Highest is set to, but in order to reduce the interference to user, reaches more preferable effect, determines the priority of subframe according to following original
Then：
1) handling capacity of system uplink is ensured, i.e., the subframe for as far as possible avoiding that uplink scheduling information will be sent is arranged to ABS
Subframe；
2) interference of system information on ABS is avoided, i.e., the subframe for as far as possible avoiding that SIB1 will be sent is arranged to ABS；
3) under equal conditions, it is ensured that the priority of normal descending sub frame is higher than special subframe, because special subframe only has
A part of resource is to be used for downlink transfer.
Various information are carried in descending sub frame, has control information, user data information etc., typically carries uplink scheduling information
Descending sub frame and carry SIB1 (System Information Broadcast, system information broadcast) information most attach most importance to
Will, therefore the priority for the descending sub frame for not carrying uplink scheduling information and SIB1 is set to the first priority, preferentially first
ABS subframe is selected as in the subframe of priority, while in uplink scheduling information and SIB1 descending sub frame is not carried also
Including special subframe.In order to obtain a preferable ABS collocation method, according to the principle of above-mentioned determination subframe priority, this hair
The priority of the subframe determined in bright embodiment is followed successively by from high to low：
The descending sub frame priority for not carrying uplink scheduling information and SIB1 is set to the first priority；It will not carry up
Schedule information and SIB1 special subframe priority are set to the second priority；The descending sub frame priority for carrying SIB1 is set to the
Three priority；The descending sub frame priority for carrying uplink scheduling information is set to the 4th priority；Uplink scheduling information will be carried
Special subframe priority be set to the 5th priority.
Certainly, the order of above-mentioned subframe priority can be adjusted suitably, and above priority orders are the embodiment of the present invention
A kind of preferred mode of the determination priority provided.
The subframe for not sending uplink scheduling information and SIB1 is preferentially set to ABS subframes in the embodiment of the present invention, such one
Aspect can ensure when using ABS algorithms, to avoid the interference to uplink scheduling information, improve and send the upper of ABS subframes base station
Row performance；On the other hand when the radio frame number that macro base station and micro-base station send SIB1 information is inconsistent, can avoid in ABS
Interference of the SIB1 to user on frame.
Base station can judge that ascending-descending subframes configure ratio in current radio frames, different matches somebody with somebody first when being configured to ABS
Put than having the different ABS bit map cycles.The service feature of base station statistical fractals cell and adjacent cell, i.e. cell are carried
Business is to the demand difference size of uplink and downlink resource, according to different uplink and downlink of different demand assignment ratios
Frame, one shares 7 kinds of ascending-descending subframes configuration ratios, is specifically how to configure ascending-descending subframes in every kind of ascending-descending subframes configuration ratio
It is known, will not be repeated here.
The ABS bit map cycles of different ascending-descending subframes configuration ratios are as follows：
(1) to ascending-descending subframes configuration than being 0, the cycle is 70ms；
(2) it is 1-5 to configure ratio to ascending-descending subframes, and the cycle is 20ms；
(3) to ascending-descending subframes configuration than being 6, the cycle is 60ms.
Base station determine needed for the method for ABS number have many kinds, if such as macro base station can be according in its overlay area
The feedback of dry femto base station, configuration ABS number is determined in conjunction with the sub-frame number that can be currently assigned as ABS, can also be direct
Determine ABS number.
After base station determines the ABS needed number, several subframes of highest priority are defined as ABS.It is determined that will
During which subframe is as ABS, it is possible to occur that alternative number of sub-frames is more than ABS required number, such as, now
4 ABS are needed, and the subframe of the first priority has 2 in the now ABS bit maps cycle, and the subframe of the second priority has 4
Individual, base station can be preferentially using 2 subframes of the first priority as ABS, and 2 sons are selected in 4 subframes of the second priority
Frame is as ABS.Specifically chosen which 2 can be random selection.Because the priority of subframe is all identical, selecting
When, the subframe needed for random random selection is as ABS.
When being configured to ABS in order to reach a kind of preferably effect, the subframe as ABS is uniformly distributed as far as possible for base station
In the radio frames in ABS bit map cycles, time delay can be so reduced.
The embodiment of the present invention illustrates the method that ABS is configured in heterogeneous network so that ascending-descending subframes configuration compares 2 as an example.When upper and lower
When row sub-frame configuration ratio is 2, the ABS bit map cycles are 20ms, that is, include two radio frames, the configuration of its ascending-descending subframes
Than as shown in figure 3, wherein S represents special subframe, D represents descending sub frame, and U represents sub-frame of uplink, sent out in subframe 3 and subframe 8
Send uplink scheduling information；Subframe 5 needs to send SIB1 information.Because SIB1 is to send in the cycle, in 20ms, SIB1 only exists
The subframe 5 of first radio frames in ABS bit map cycles is sent.
As shown in figure 4, base station determines method according to previously described more excellent subframe priority, each subframe in Fig. 3 is determined
Priority, wherein from 1~4 represent subframe priority be respectively the first priority to the 4th priority, i.e., " 1 " represents the son
The highest priority of frame, " 4 " represent that the priority of the subframe is minimum, it is necessary to explanation, because no priority is the in Fig. 4
The subframe of five priority, so the subframe of lowest priority is the subframe of the 4th priority in Fig. 4.
Base station is determined as ABS subframe according to the priority of subframe.As shown in figure 5, list ABS number of needs
When respectively 2,4,6 and 8, distributions of the ABS in the ABS bit map cycles that is configured according to the method for the embodiment of the present invention.
Certainly, what Fig. 5 was listed is to be needed when needing the ABS of varying number as a kind of compared with optimal sorting mode for cloth of ABS subframes
It is noted that without prejudice on the premise of being determined as ABS subframe by subframe priority, distribution mode can also be other
Form.
When the number of sub-frames in same priority be more than in the priority it needs to be determined that for ABS number of sub-frames when, be
The subframe for being defined as ABS in the priority, can be evenly distributed in the ABS bit map cycles by reduction time delay.Specifically
, can be according to number of the subframe in the priority in the ABS bit map cycles in each radio frames and position, in each nothing
The equal subframe of quantity is selected in line frame as far as possible as ABS, while as ABS position of the subframe in different radio frame
It should try one's best corresponding.As shown in figure 4, there is 2 radio frames in Fig. 4, wherein priority shares 7 for the subframe of the first priority, when
When needing 2 ABS, it is evenly distributed in order that obtaining ABS in radio frames, as shown in figure 5, one can respectively be selected in each radio frames
Individual priority for the first priority subframe as ABS, while as ABS subframe in radio frames location it is also relative
Should, all it is the subframe that subframe number is 4；When needing 4 ABS, it is evenly distributed in order that obtaining ABS in radio frames, Ke Yi
The subframe that two priority are the first priority is respectively selected in each radio frames as ABS, at the same as ABS subframe in radio frames
It is the location of middle also corresponding, all it is the subframe that subframe number is 4 and 9.
Preferably, the base station selects the subframe as ABS according to the priority of the subframe successively from high to low, if
The number of sub-frames of same priority is more than in the priority number of sub-frames it needs to be determined that for ABS, then according in the priority
Number and position of the subframe in the radio frames in ABS bit map cycles, the subframe for being defined as ABS in the priority is equal
It is even to be distributed in the ABS bit maps cycle.
For above method flow, the embodiment of the present invention also provides a kind of configuration ABS device, the particular content of the device
Above method implementation is referred to, will not be repeated here.
As shown in fig. 6, the embodiment of the present invention provides a kind of configuration ABS structure drawing of device, the device includes：
Priority determining unit 601, described in the information that is carried in the type according to subframe and the subframe determines
The priority of subframe；
Almost blank subframe determining unit 602, for according to the excellent of almost blank subframe ABS number and the subframe
First level configures ABS.
Preferably, the priority determining unit 601 is used for：
Determine that the priority of the subframe is followed successively by from high to low, uplink scheduling information and system information broadcast will not be carried
SIB1 descending sub frame priority is set to the first priority；
The special subframe priority for not carrying uplink scheduling information and SIB1 is set to the second priority；
The descending sub frame priority for carrying SIB1 is set to third priority；
The descending sub frame priority for carrying uplink scheduling information is set to the 4th priority；
The special subframe priority for carrying uplink scheduling information is set to the 5th priority.
Preferably, the almost blank subframe determining unit 602 is used for：
The subframe as ABS is selected successively from high to low according to the priority of the subframe, if the son of same priority
Frame number is more than in the priority number of sub-frames it needs to be determined that for ABS, then ABS number as needed is in the priority
ABS subframe is determined as in subframe at random.
Preferably, the almost blank subframe determining unit 602 is used for：
The subframe as ABS is selected successively from high to low according to the priority of the subframe, if the son of same priority
Frame number is more than in the priority number of sub-frames it needs to be determined that for ABS, then the subframe in the priority is in ABS bits
The number in the radio frames in cycle and position are mapped, the subframe for being defined as ABS in the priority is evenly distributed on the ABS
In the bit map cycle.
From the above, it is seen that the information that base station carries according to the type and subframe of subframe in the embodiment of the present invention is true
The priority of stator frame, ABS subframe is determined as according to the priority of subframe after the ABS quantity of needs is determined.
Base station can notify other base stations in its coverage after confirming as ABS subframe by X2 interface, so other
Base station can be with the configuration mode according to base station ABS in its radio frames, and scheduling accesses in its cell and is disturbed serious use
The down control channel at family.The subframe as ABS was evenly distributed in the ABS bit map cycles simultaneously, can be effective
The time delay of radio frames is reduced, so as to improve the overall performance of system.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more
The shape for the computer program product that usable storage medium is implemented on (including but is not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (6)
- A kind of 1. configuration ABS method, it is characterised in that this method includes：Base station determines the priority of the subframe according to the information carried in the type of subframe and the subframe；Specifically, institute State base station and determine that the priority of the subframe is followed successively by from high to low, uplink scheduling information and system information broadcast will not be carried SIB1 descending sub frame priority is set to the first priority；The special subframe priority of uplink scheduling information and SIB1 will not carried It is set to the second priority；The descending sub frame priority for carrying SIB1 is set to third priority；Uplink scheduling information will be carried Descending sub frame priority is set to the 4th priority；It is preferential that the special subframe priority for carrying uplink scheduling information is set to the 5th Level；The base station configures ABS according to the almost priority of blank subframe ABS number and the subframe.
- 2. the method as described in claim 1, it is characterised in that the base station according to almost blank subframe ABS number and The priority configuration ABS of the subframe, including：The base station selects the subframe as ABS according to the priority of the subframe successively from high to low, if same priority Number of sub-frames be more than in the priority it needs to be determined that number of sub-frames for ABS, then ABS number as needed is preferential at this ABS subframe is determined as in the subframe of level at random.
- 3. the method as described in claim 1, it is characterised in that the base station according to almost blank subframe ABS number and The priority configuration ABS of the subframe, including：The base station selects the subframe as ABS according to the priority of the subframe successively from high to low, if same priority Number of sub-frames be more than in the priority it needs to be determined that number of sub-frames for ABS, then the subframe in the priority is in ABS Number and position in the radio frames in bit map cycle, the subframe for being defined as ABS in the priority is evenly distributed on institute State in the ABS bit map cycles.
- 4. a kind of configuration ABS device, it is characterised in that the device includes：Priority determining unit, the information carried in the type according to subframe and the subframe determine the excellent of the subframe First level；The priority determining unit, specifically for determining that the priority of the subframe is followed successively by from high to low, it will not carry Row schedule information and system information broadcast SIB1 descending sub frame priority are set to the first priority；Uplink scheduling letter will not be carried Breath and SIB1 special subframe priority are set to the second priority；It is preferential that the descending sub frame priority for carrying SIB1 is set to the 3rd Level；The descending sub frame priority for carrying uplink scheduling information is set to the 4th priority；The special of uplink scheduling information will be carried Subframe priority is set to the 5th priority；Almost blank subframe determining unit, for being matched somebody with somebody according to the almost priority of blank subframe ABS number and the subframe Put ABS.
- 5. device as claimed in claim 4, it is characterised in that the almost blank subframe determining unit is used for：The subframe as ABS is selected successively from high to low according to the priority of the subframe, if the subframe of same priority Number is more than in the priority number of sub-frames it needs to be determined that for ABS, then the subframe of ABS number as needed in the priority In be determined as ABS subframe at random.
- 6. device as claimed in claim 4, it is characterised in that the almost blank subframe determining unit is used for：The subframe as ABS is selected successively from high to low according to the priority of the subframe, if the subframe of same priority Number is more than in the priority number of sub-frames it needs to be determined that for ABS, then the subframe in the priority is in ABS bit maps Number and position in the radio frames in cycle, the subframe for being defined as ABS in the priority is evenly distributed on the ABS bits Map in the cycle.
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| CN103096487A (en) * | 2011-04-26 | 2013-05-08 | 普天信息技术研究院有限公司 | Method and system of semi-static scheduling of heterogeneous network |
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