CN102404863B - Time domain interference coordination method in hybrid network - Google Patents
Time domain interference coordination method in hybrid network Download PDFInfo
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- CN102404863B CN102404863B CN201010282426.2A CN201010282426A CN102404863B CN 102404863 B CN102404863 B CN 102404863B CN 201010282426 A CN201010282426 A CN 201010282426A CN 102404863 B CN102404863 B CN 102404863B
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- base station
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Abstract
The invention discloses a kind of time domain interference coordination method in hybrid network; the method is: be disturbed cell base station before its subordinate user enters interfered cell; first receive the length information of PDCCH in the subband position of downlink data and subframe or subframe controls the positional information of message part resource to be protected and informs base station, interfered cell by the subframe numbers of described subordinate's CU, subframe are used for described subordinate user, allow base station, interfered cell make in advance and dodge.Interactive information between present invention different base station in a network adds the information about subframe control channel PDCCH length or the positional information of subframe control message part resource to be protected; base station, interfered cell can be made full use of available running time-frequency resource and carry out the data transmission of this community while protection is disturbed community user control channel and data channel.The present invention not only reduces and is disturbed community user experienced interference, also takes full advantage of the system time frequency resource of interfered cell simultaneously.
Description
Technical field
The invention belongs to wireless communication technology field, relate to a kind of time domain interference coordination method in hybrid network.
Background technology
In following mobile communication system, there is the application scenarios of hybrid network, the tool i.e. formed at macro base station
In having the cellular network coverage of good planning, there is the covering of multiple low power base station LPN.So at certain
A little regions, macro base station and LPN repeat to cover, form multitiered network.
During in hybrid network, monolayer honeycomb net has been broken in the introducing of low power base station LPN, the ownership principle of user, causes
Interference scene in hybrid network is with the interference scene of original monolayer honeycomb net entirely different.It it is one with LPN
As a example by CSG (Closed Subscriber Group) Home eNodeB HeNB (Home eNB), Fig. 1 explanation
The disturbed condition of hybrid network.In Fig. 1, MeNB represents the macro base station of cellular network, and MUE represents and belongs to
The user of MeNB；HeNB represents that Home eNodeB, HUE represent the user belonging to HeNB.When a macro base station
When user MUE2 moves in the coverage of Home eNodeB HeNB, MUE2 can detect from HeNB the strongest
Downstream signal intensity, but can not be allowed to access owing to HeNB is CSG, thus or can only belong to
Macro base station MeNB, and by descending interference the strongest for HeNB.This strong descending interference not only has a strong impact on
MUE2 for the reception of downstream data channel PDSCH (Physical Downlink Shared CHannel),
But also have a strong impact on it to down control channel PDCCH (Physical Downlink Control CHannel)
Reception.In the scene shown in Fig. 1, MeNB is the cell base station being disturbed, and HeNB is interfered cell base
Standing, MUE2 is a victim user.
For how reducing user's experienced interference when receiving PDSCH, 3GPP has goed deep in R8, R9
Discussing, these R8, R9 interference coordination technique still may be used for the user in hybrid network, reduces logarithm and it is believed that
The interference effect that road receives.But, for how reducing interference when PDCCH channel is received by user, R8,
R9 technology is not directed to, and is the most just becoming the emphasis of 3GPP R10 technical discussion.
How to reduce experienced interference when PDCCH channel is received by user, the solution having pointed out at present is main
In terms of time domain, in units of subframe, to base station, interfered cell be disturbed the time domain of cell base station and take and carry out
Coordinate.
Fig. 2 be disturbed between cell base station and base station, interfered cell subframe is taken coordinate after use one
Individual schematic diagram.The OFDM symbol being disturbed cell base station and base station, interfered cell in Fig. 2 is close alignment.
Be disturbed cell base station subframe N+1 scheduled downlink data give its (Victim UE) victim user, should
The PDCCH needing to be properly received subframe N+1 victim user just can know that (figure in certain time/frequency source block
In have stain filling part) receive downlink data.In order to ensure that victim user is to controlling channel and data channel
Being properly received, being disturbed cell base station can inform in advance subframe numbers N+1 to base station, interfered cell, makes to do
Disturb community to dodge, i.e. base station, interfered cell is disturbed the position of cell base station subframe N+1, i.e. subframe in correspondence
Signal hardly on M+1, form an Almost blank subframe.The most conventional Almost blank
Subframe the most only sends descending public reference signal.
3GPP agreement according to Home eNodeB, between Home eNodeB and Home eNodeB and macrocellular base
The purpose of interference coordination between standing, the information that can carry out subframe and subband between base station is mutual.If be disturbed
Cell base station informs in advance base station, interfered cell oneself needs subframe numbers to be protected and victim user to be scheduled for
Receive the subband position of downlink data, then base station, interfered cell avoids the need for vacating a complete subframe and do not sends out number
According to.
Fig. 3 is disturbed cell base station subframe numbers to be protected (such as N+1) for knowing when base station, interfered cell
And after sub-band information (in figure, stain fills part), just have only to vacate position corresponding in subframe M+1 (i.e.
Without any filling part) signal hardly, and in other time/frequency source block remaining, this community user is entered
Row downlink data sends.The schedule information sent for data in M+1 subframe can be completed by subframe M,
Have document at present and propose the concept across frame scheduling, but be only applicable to R10 user.
Summary of the invention
The technical problem to be solved is: provide a kind of time domain interference coordination method in hybrid network, should
Method is reducing victim user while receiving the interference controlling channel and data channel, moreover it is possible to make full use of dry
Disturb the system time frequency resource of community.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that.
A kind of time domain interference coordination method in hybrid network is: is disturbed cell base station and enters dry its subordinate user
Before disturbing community, first receive the subframe numbers of described subordinate's CU, subframe are used for described subordinate user
In the subband position of downlink data and described subframe, the length information of PDCCH informs base station, interfered cell, allows
Base station, interfered cell is made in advance and being dodged.
Time domain interference coordination method in another kind of hybrid network is: described in be disturbed cell base station its subordinate user
Before entering interfered cell, first use the subframe numbers of described subordinate's CU, subframe are used for described subordinate
The position controlling message part resource to be protected in the subband position of family reception downlink data and described subframe
Base station, information notification interfered cell, allows base station, interfered cell make in advance and dodges.
The beneficial effects of the present invention is: the interactive information between present invention different base station in a network adds pass
In the information of control channel PDCCH length, or the position controlling message part resource to be protected in subframe
Information so that base station, interfered cell can be while protection be disturbed cell control channels and data channel, fully
Running time-frequency resource is utilized to carry out the data transmission of this community.The present invention not only reduces and is disturbed what community user was subject to
Interference, also takes full advantage of the system time frequency resource of interfered cell simultaneously.
Accompanying drawing explanation
Fig. 1 is the interference scene schematic diagram in hybrid network；
Fig. 2 is the coordination approach schematic diagram of traditional only mutual sub-frame information；
Fig. 3 is the coordination approach schematic diagram of traditional mutual sub-frame information and sub-band information；
Fig. 4 is the time domain interference coordination method schematic diagram in the hybrid network described in embodiment one；
Fig. 5 is the time domain interference coordination method schematic diagram in the hybrid network described in embodiment two.
Detailed description of the invention
The introducing of low power base station causes disturbing the interference scene of scene and monolayer honeycomb net in hybrid network the most not
With.In hybrid network, victim user is not only disturbed in DRP data reception process strongly, and is controlling letter
The most strongly disturbed during the reception in road.Different capacity base station in network is mainly communicated by the present invention
Coordinate, reduce victim user and receiving control channel and the interference of data channel.
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
Embodiment one
From being disturbed between cell base station and base station, interfered cell mutual sub-frame information, to subframe mutual between two base stations
And sub-band information, base station, interfered cell has improve much for the utilization of resource.But can also from Fig. 3
Find out, owing to the length letter of cell base station PDCCH in subframe N+1 is not known to be disturbed in base station, interfered cell
Breath, in order to protect victim user for the reception of PDCCH, only in PDCCH maximal possible length 3
OFDM symbol is dodged.
The present embodiment provides a kind of time domain interference coordination method in hybrid network, and the detailed content of the method is:
It is disturbed between cell base station and base station, interfered cell in addition to mutual subframe numbers, sub-band information, more mutual by dry
Disturb the length information of PDCCH in the protected subframe of cell base station, so that base station, interfered cell can be just
Vacate the PDSCH position of shielded PDCCH and victim user, signal hardly.As shown in Figure 4, when
Base station, interfered cell is known and is disturbed cell base station in subframe N+1 after the length information of PDCCH, Ke Yizhun
Really dodge out the victim user reception (in figure subframe M+1 without any filling part) for PDCCH,
Make use of efficient resource largely.
Embodiment two
The present embodiment provides the time domain interference coordination method in another kind of hybrid network: be disturbed cell base station with dry
Disturb between cell base station in addition to mutual subframe numbers, sub-band information, more mutual subframe controls message part and is intended to protect
The positional information of resource so that base station, interfered cell can just vacate subframe control in message part with desire
The resource that protection resource is corresponding, protects the victim user reception to PDCCH.
As it is shown in figure 5, when base station, interfered cell knows that being disturbed cell base station controls information portion in subframe N+1
After dividing the position (in figure, subframe N+1 has netting twine filling part) of resource to be protected, can vacate,
Protection victim user for the reception (in Fig. 5 subframe M+1 without any filling part) of PDCCH and PDSCH,
Farthest make use of efficient resource.
Advantage of this embodiment is that: interfered cell can dispatch Rel-8 user in subframe M+1, it is possible to
To carry out the data transmission of Rel-10 user.Rel-8 user (current user) can not be across frame scheduling, and it is only
The PDCCH (i.e. schedule information) of oneself can be received, in the data of this subframe at the message part that controls of this subframe
Part finds and oneself receives the position of data.Rel-10 user's (i.e. future customer) can be by previous son
The message part that controls of frame receives the PDCCH of oneself, learns the reception data data portion in next subframe of oneself
Point.
The present invention is applicable not only to base station, interfered cell and is disturbed the scene that cell base station OFDM symbol is alignd,
It is also applied for the scene that two class base station OFDM symbol do not line up.The present invention is applicable to LTE-A network system, also
It is applicable to the system of the multitiered network covered by different capacity base station.
Here description of the invention and application is illustrative, is not wishing to limit the scope of the invention to above-mentioned reality
Execute in example.The deformation of embodiments disclosed herein and change are possible, for the common skill of those this areas
For art personnel, the various parts with equivalence of replacing of embodiment are known.It should be clear to a person skilled in the art that
, in the case of without departing from the spirit or essential characteristics of the present invention, the present invention can otherwise, knot
Structure, layout, ratio, and realize with other elements, material and parts.
Claims (2)
1. the time domain interference coordination method in a hybrid network, it is characterised in that described coordination approach is: be disturbed
Cell base station before its subordinate user enters interfered cell, first by the subframe numbers of described subordinate's CU,
Subframe receives the length of PDCCH in the subband position of downlink data and described subframe for described subordinate user
Degree base station, information notification interfered cell, allows base station, interfered cell make in advance and dodges.
2. the time domain interference coordination method in a hybrid network, it is characterised in that: it is disturbed cell base station its subordinate
Before user enters interfered cell, first by the subframe numbers of described subordinate's CU, subframe are used for described under
Belong to the position controlling message part resource to be protected that user receives in the subband position of downlink data and subframe
Base station, information notification interfered cell, allows base station, interfered cell make in advance and dodges.
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| CN201010282426.2A CN102404863B (en) | 2010-09-15 | 2010-09-15 | Time domain interference coordination method in hybrid network |
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| CN201010282426.2A CN102404863B (en) | 2010-09-15 | 2010-09-15 | Time domain interference coordination method in hybrid network |
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| CN102404863A CN102404863A (en) | 2012-04-04 |
| CN102404863B true CN102404863B (en) | 2016-08-24 |
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| CN114449571B (en) * | 2022-01-30 | 2023-09-19 | 北京云智软通信息技术有限公司 | Method and device for configuring cell access resource under strong interference condition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483511A (en) * | 2008-01-09 | 2009-07-15 | 三星电子株式会社 | Method suitable for multiple TDD system coexistence |
| CN101827053A (en) * | 2010-02-08 | 2010-09-08 | 清华大学 | Method for restraining intercell interference |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101541088A (en) * | 2008-03-19 | 2009-09-23 | 中国移动通信集团公司 | Method, device and system for eliminating interference among cells |
| US8971241B2 (en) * | 2008-09-30 | 2015-03-03 | Qualcolmm Incorporated | Techniques for supporting relay operation in wireless communication systems |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483511A (en) * | 2008-01-09 | 2009-07-15 | 三星电子株式会社 | Method suitable for multiple TDD system coexistence |
| CN101827053A (en) * | 2010-02-08 | 2010-09-08 | 清华大学 | Method for restraining intercell interference |
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