CN104469813B - A method of carrying out inter-cell interference cancellation - Google Patents
A method of carrying out inter-cell interference cancellation Download PDFInfo
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- CN104469813B CN104469813B CN201310413595.9A CN201310413595A CN104469813B CN 104469813 B CN104469813 B CN 104469813B CN 201310413595 A CN201310413595 A CN 201310413595A CN 104469813 B CN104469813 B CN 104469813B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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Abstract
The present invention provides a kind of methods for carrying out inter-cell interference cancellation.According to embodiment of the present invention, it is proposed a kind of method that inter-cell interference cancellation is carried out in the first user equipment, wherein, first user equipment is administered by serving BS, and the potential interference by least one the second user equipment at least one interfered cell administered by least one interference base station, this method comprises the following steps: it is the first Downlink Control Information that the first user equipment generates that b., which receives serving BS from serving BS, and network-assist information is received from least one interference base station based on scheduled transmission mode, network-assist information includes the second Downlink Control Information that public information and the interference base station of the interfered cell of interference base station generate at least one second user equipment;And c. carries out inter-cell interference cancellation based on the first Downlink Control Information, the public information of at least one interfered cell and the second Downlink Control Information.
Description
Technical field
The present invention relates to mobile communication technology more particularly to a kind of methods for carrying out inter-cell interference cancellation.
Background technique
The requirement of data application is supported to drive research and development with high handling capacity and spectrum efficiency mobile network at present
The demand of 4G network based on OFDM, this includes WiMAX, 3GPPLTE and LTE-A.LTE and LTE-A is interference limiting system,
It is located in the region with intensive cell.Therefore, the important research project of LTE and lte-a system is that minizone is dry
Disturb elimination.In the discussion of Release-8/9, the inter-cell interference cancellation between the macrocell based on RNTP/HII/OI is proposed.
In the discussion of Release-10, CoMP and almost blank subframe are proposed for the interference between macrocell and Microcell and disappear
It removes.In Release-11, the FeICIC AF panel of the CRS with network assistance and elimination are proposed for further property
It can improve.
However, needing intensive cell arrangements and improved cell frequency to deal with the data service with exponential increase
Spectrum efficiency.Cochannel interference (co-channel interference) (is either caused still by inter-cell interference by adjusting jointly
User in the cell of degree causes) it is all main limiting factor for obtaining better network capabilities.With disappearing for transmission equipment side
Except comparing, significant performance gain is also capable of providing in the AF panel of receiving side or elimination.In sphere of learning, it has already been proven that string
Row interference is eliminated and parallel interference canceller is capable of providing significant performance gain.In the case where considering above-mentioned gain,
In RAN#59 meeting, research project: (Network Assisted is eliminated and is inhibited in the network assistance interference for LTE
Interference Cancellation and Suppression, NAICS) RAN1 and RAN4 be agreed for
The research project of Release-12.
In RAN1#73 meeting, have agreed to research project top priority be PSDCH and PDSCH interference eliminate/
Inhibit.
This research project is in early stage, and FelCIC of the work based on Release-11, it is therefore desirable to limit
Determine the detailed content of network-assist information.Currently existing scheme is the FelCIC in Release-11.Relative to PSDCH and PDSCH
Interference elimination/inhibition needed for information, CRS interfere elimination/inhibition needed for information be less.Eliminating PDSCH interference can
It can require to regenerate PDSCH signal, this just needs network to provide enough information (such as possible scheduling information, demodulation letter
Breath etc.).Therefore the method for FeiCIC is inadequate for the NAICS in Release-12.
Summary of the invention
It is considered based on above-mentioned, according to the first aspect of the invention, proposes one kind and carry out cell in the first user equipment
Between interference elimination method, wherein first user equipment is administered by serving BS, and by by least one interfere base
Stand administration at least one interfered cell at least one second user equipment potential interference, the method includes walking as follows
Rapid: it is the first Downlink Control Information that first user equipment generates that b., which receives the serving BS from the serving BS,
And network-assist information, the network-assist information are received from least one described interference base station based on scheduled transmission mode
The public information of interfered cell including interference base station and the interference base station are that at least one described second user equipment generates
The second Downlink Control Information；And c. based on first Downlink Control Information, at least one interfered cell it is public
Information and second Downlink Control Information carry out inter-cell interference cancellation.
According to the second aspect of the invention, propose it is a kind of administer the first user equipment serving BS in assist described in
The method of first user equipment progress inter-cell interference cancellation, wherein first user equipment is by by least one interference
The potential interference of at least one second user equipment at least one interfered cell of base station administration, and wherein provided in time-frequency
Predetermined resource is reserved on source to transmit the network-assist information of at least one interference base station, wherein each interference base station institute
The resource accounted for is mutually orthogonal, and described method includes following steps: A. sends instruction information, instruction to first user equipment
Position of the predetermined resource on the running time-frequency resource.
According to the third aspect of the invention we, propose one kind assists the first user equipment to carry out minizone in interference base station
Interference elimination method, wherein the interference base station administers at least one second user equipment, at least one described second user
Equipment generates potential interference to first user equipment, and first user equipment is located at the cell administered by serving BS
In, and it is reserved with predetermined resource on running time-frequency resource wherein to transmit the network-assist information of at least one interference base station,
In resource shared by each interference base station it is mutually orthogonal, described method includes following steps: X1. is shared by the interference base station
Network-assist information is sent to first user equipment with scheduled transmission mode in resource, the network-assist information includes
The public information of the interfered cell of the interference base station and the interference base station are that at least one described second user equipment generates
The second Downlink Control Information.
According to the fourth aspect of the invention, a kind of side that inter-cell interference cancellation is carried out in the first user equipment is proposed
Method, wherein first user equipment is administered by serving BS, and by least one administered by least one interference base station
The potential interference of at least one second user equipment in a interfered cell, described method includes following steps: S1. is from the clothes
It is the first Downlink Control Information that first user equipment generates that business base station, which receives the serving BS, and based on scheduled
Transmission mode receives network-assist information from the serving BS, and the network-assist information includes that at least one described interference is small
The public information in area and at least one described interference base station are the second downlink control that at least one described second user equipment generates
Information processed;And S2. is based on first Downlink Control Information, the public information of at least one interfered cell and described
Second Downlink Control Information carries out inter-cell interference cancellation.
According to the fifth aspect of the invention, propose it is a kind of administer the first user equipment serving BS in assist described in
The method of first user equipment progress inter-cell interference cancellation, wherein first user equipment is by by least one interference
The potential interference of at least one second user equipment at least one interfered cell of base station administration, the method includes as follows
Step: i. receives network-assist information from least one described interference base station, and the network-assist information includes interference base station
The public information of interfered cell and the interference base station are the second downlink control that at least one described second user equipment generates
Information;And ii. to first user equipment send the serving BS be first user equipment generate first under
Row control information, and the network-assist information is sent to first user equipment based on scheduled transmission mode.
According to the sixth aspect of the invention, propose one kind assists the first user equipment to carry out minizone in interference base station
Interference elimination method, wherein the interference base station administers at least one second user equipment, at least one described second user
Equipment generates potential interference to first user equipment, and first user equipment is located at the cell administered by serving BS
In, described method includes following steps: sending network-assist information to the serving BS, the network-assist information includes institute
The public information and the interference base station for stating the interfered cell of interference base station are that at least one described second user equipment generates
Second Downlink Control Information.
In the present invention, it solves the problems, such as transmission network auxiliary information, and is distributed for the transmission of network-assist information
The problem of resource.It which thereby enhances and eliminates the ability of inter-cell interference in user equipment side, improve reliability and the Shandong of communication
Stick.
Various aspects of the invention will be more clear by the explanation of embodiment in detail below.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent:
Fig. 1 shows the scene figure according to an embodiment of the invention for carrying out inter-cell interference cancellation;
Fig. 2 shows the flow charts of the method according to an embodiment of the invention for carrying out inter-cell interference cancellation;
Fig. 3 shows the signal of the transmission distribution resource according to an embodiment of the invention for network-assist information
Figure;
Fig. 4 shows the flow chart of the method for carry out inter-cell interference cancellation according to another embodiment of the invention;
And
Fig. 5 shows a kind of example format of network-assist information.
Run through different diagrams in the figure, same or similar appended drawing reference indicates identical or corresponding component or spy
Sign.
Specific embodiment
Basic conception of the invention is to propose one group of cochannel interference (adjacent) cell, and is the net of interfered cell
Network auxiliary information is assigned with resource (i.e. Physical Resource Block to).It should be appreciated that serving cell can be used as in MU-MIMO transmission
Interfered cell, therefore be not excluded except the group of interfered cell.
Fig. 1 shows the scene figure according to an embodiment of the invention for carrying out inter-cell interference cancellation.Such as Fig. 1 institute
Show, serving BS administers the first user equipment, and interference base station administers second user equipment.In the scene of Fig. 1, the first user is set
By the interference for arriving second user equipment and interference base station.Although here, it may be noted that schematically showing one in Fig. 1
Interference base station and a second user equipment, but in other embodiments of the invention, there may be multiple interference base stations and
Associated interfered cell.Each interference base station can also administer multiple second users for forming interference to the first user equipment and set
It is standby.
In the following, by first embodiment of the invention is described in conjunction with Fig. 1, Fig. 2 and Fig. 3.Of the invention
In one embodiment, network-assist information is sent by interfered cell.
Fig. 2 shows the flow charts of the method according to an embodiment of the invention for carrying out inter-cell interference cancellation.
In this embodiment, it is auxiliary come the network for transmitting at least one interference base station that predetermined resource is reserved on running time-frequency resource
Supplementary information, wherein resource shared by each interference base station is mutually orthogonal.
Fig. 3 shows the signal of the transmission distribution resource according to an embodiment of the invention for network-assist information
Figure.In the figure, the resource of predefined Physical Resource Block pair is assigned to the transmission of network-assist information.Here, with dashed box
The predetermined resource reserved on running time-frequency resource is shown, the network-assist information of each interference base station is used for transmission.Also, at this
The shared resource of four interfered cells is schematically shown in figure.In these resources, four interference base stations transmit respectively
Its respective network-assist information.
In the fig. 3 embodiment, these resources are continuous dispensings.In some alternative embodiments, Physical Resource Block
Pair resource can be dispersion, with using frequency density.Exclusive Physical Resource Block pair is assigned in each interfered cell
Resource carry out the transmission for network-assist information.The resource of the network-assist information of each interfered cell can be with mutually orthogonal
Mode distribute, and resource shared by the network-assist information of each interfered cell can be staggered by the mark of cell
(cell-ID shifted) is identified.Therefore received robustness is improved.
In one embodiment of the invention, the network-assist information of different community can be multiplexed in time.They are not
It needs to occur in each subframe, the subframe including network-assist information can be indicated by RRC signaling.
In another embodiment of the present invention, the position of the resource of the Physical Resource Block pair of distribution can be interfered cell
Cell ID function.Therefore, a kind of this mode for providing recessiveness for user equipment is come so that user equipment is able to access that
The network-assist information of interested interfered cell.Alternatively, some interfered cells in the group of interfered cell are assigned at its
Any network-assist information can not also be sent in resource.Such as the network-assist information of the cell 3 in Fig. 3 can leave a blank without
It is transmitted.
Turning now to Fig. 2, in step s 201, the first user equipment receives instruction information from serving BS, and instruction is pre-
Determine position of the resource on running time-frequency resource.Namely the position of the predetermined resource in the dashed box in Fig. 3.
In step S202, the first user equipment from serving BS receive serving BS be the first user equipment generate the
One Downlink Control Information.
In step S203, the first user equipment determines the interference base station that interference is generated to it according to pre-defined rule.It is preferred that
Ground, in this step, the first user equipment can identify these above-mentioned interference based on the measurement of the RSRP of neighboring community
Cell.It is assessed as causing the network of the interfered cell of very big interference auxiliary it means that user equipment also only needs to obtain
Supplementary information, and thus good gain will be obtained from interference elimination/inhibition.
In step S204, mark of first user equipment on predetermined resource through cell is staggered identified to identify
The resource of interference base station transmission network-assist information.
In step S205, the first user equipment identified interference base station send network-assist information resource on,
Network-assist information is received from identified interference base station based on scheduled transmission mode.Those network-assist informations include that institute is true
The public information of the interfered cell of fixed interference base station and identified interference base station are the generation of at least one second user equipment
The second Downlink Control Information.Herein, it should be noted that scheduling information (the downlink control of not all user equipment
Information) it will be included in network-assist information.Network-assist information can or should only include that those set the first user
Standby (carrying out the user equipment of interference elimination) generates the Downlink Control Information of the surrounding user equipments of very big interference.
Specifically, configuration information of the public information of interfered cell for example including PSS/SSS, PBCH configuration information and/
Or the scheduling information of EPDCCH.Here, preferably carrying out transmission network auxiliary information with scheduled transmission mode.For example, base station and
User equipment appoints antenna port configuration and scheduled modulation system, so that user equipment can be demodulated successfully accordingly
Network-assist information.Antenna port 7 and 8 can be used for example herein, and use QPSK modulation system.
In step S206, interference of first user equipment based on the first Downlink Control Information, identified interference base station
The public information of cell and identified interference base station are that the second downlink that at least one second user equipment generates controls letter
Breath carries out inter-cell interference cancellation.
Fig. 4 shows the flow chart of the method for carry out inter-cell interference cancellation according to another embodiment of the invention.
In this embodiment of the invention, network-assist information is sent by interfered cell.It will be in conjunction with Fig. 1, to the flow chart of Fig. 4
It is described.
In step S401, serving BS receives network-assist information, network-assist information packet from least one interference base station
The public information and interference base station that include the interfered cell of interference base station are the second downlink that at least one second user equipment generates
Control information.The transmission process can for example be realized by X2 interface.
In step S402, the first user equipment from serving BS receive serving BS be the first user equipment generate the
One Downlink Control Information, and network-assist information is received from serving BS based on scheduled transmission mode.
Here, similar with one embodiment, network-assist information include at least one interfered cell public information and
At least one interference base station is the second Downlink Control Information that at least one second user equipment generates.Similarly, to scheduled
The definition of transmission mode and public information is also similar with one embodiment, and this will not be detailed here.
Specifically, serving BS will issue its network-assist information based on each interference base station, and it is auxiliary to generate new network
Supplementary information, and send it to the first user equipment.Fig. 5 shows a kind of example format of network-assist information.Such as Fig. 5 institute
Show, it is assumed that have the network-assist information of 4 interfered cells.Wherein the network-assist information of the 4th interfered cell includes n right
First user equipment forms the Downlink Control Information of the second user equipment of interference and the public information of the 4th cell.
In step 5403, user equipment is determined according to pre-defined rule generates the interference base station of interference to it, this is also with the
Corresponding steps in one embodiment are similar, and this will not be detailed here.It is thus preferable to which user equipment is only received from serving BS
And the network-assist information that the interference base station of severe jamming is generated to it is obtained, to be used for subsequent inter-cell interference cancellation.This
Such as it can also be realized by being staggered for cell ID.
Then, in step 5404, the first user equipment is based on the first Downlink Control Information, identified interference base station
The public information of interfered cell and identified interference base station are the second downlink control that at least one second user equipment generates
Information processed carries out inter-cell interference cancellation.
It should be noted that above-described embodiment is only exemplary, rather than limitation of the present invention.It is any without departing substantially from this hair
The technical solution of bright spirit should all be fallen under the scope of the present invention, this includes using occurring in different embodiments not
Same technical characteristic, method can be combined, to obtain beneficial effect.
Claims (13)
1. a kind of method for carrying out inter-cell interference cancellation in the first user equipment, wherein first user equipment is by taking
Business base station is administered and is used by least one of at least one interfered cell administered by least one interference base station second
The potential interference of family equipment, it is auxiliary to transmit the network of at least one interference base station that predetermined resource is reserved on running time-frequency resource
Supplementary information, and resource shared by each interference base station is mutually orthogonal, and described method includes following steps:
A. instruction information is received from the serving BS, indicates position of the predetermined resource on the running time-frequency resource；
B. receiving the serving BS from the serving BS is the first Downlink Control Information that first user equipment generates,
And network-assist information, the network-assist information are received from least one described interference base station based on scheduled transmission mode
The public information of interfered cell including interference base station and the interference base station are that at least one described second user equipment generates
The second Downlink Control Information；And
C. public information and second downlink based on first Downlink Control Information, at least one interfered cell
It controls information and carries out inter-cell interference cancellation,
Wherein the step b further comprises:
B1. the interference base station that interference is generated to first user equipment is determined according to pre-defined rule；
B2. it on the predetermined resource, is staggered by the mark of cell to identify that identified interference base station sends network assistance
The resource of information；And
B3. in the resource that identified interference base station sends network-assist information, the scheduled transmission mode is based on from institute
Determining interference base station receives the network-assist information, and the network-assist information includes the interference of identified interference base station
The public information of cell and the identified interference base station are the second downlink that at least one described second user equipment generates
Control information.
2. the method according to claim 1, wherein the scheduled transmission mode includes scheduled antenna port
Configuration and scheduled modulation system.
3. the method according to claim 1, wherein the public information of the interfered cell includes PSS/SSS's
The scheduling information of configuration information, the configuration information of PBCH and/or EPDCCH.
4. the method according to claim 1, wherein the pre-defined rule includes: to receive function based on reference signal
The measurement of rate generates the interference base station of interference to identify to first user equipment.
5. a kind of assist the first user equipment progress inter-cell interference to disappear in the serving BS for administering the first user equipment
The method removed, wherein first user equipment is by least one interfered cell administered by least one interference base station
At least one second user equipment potential interference, and it is described to transmit that predetermined resource is wherein reserved on running time-frequency resource
The network-assist information of at least one interference base station, wherein resource shared by each interference base station is mutually orthogonal, and the net
Network auxiliary information includes the public information of the interfered cell of interference base station and the interference base station is at least one described second use
The second Downlink Control Information that family equipment generates, described method includes following steps:
A. instruction information is sent to first user equipment, indicates position of the predetermined resource on the running time-frequency resource
It sets；And
B. sending the serving BS to first user equipment is the first downlink control that first user equipment generates
Information.
6. a kind of method for assisting the first user equipment to carry out inter-cell interference cancellation in interference base station, wherein the interference
At least one second user equipment is administered in base station, at least one described second user equipment generates first user equipment latent
It is interfering, first user equipment is located in the cell administered by serving BS, and is wherein reserved on running time-frequency resource
Predetermined resource transmits the network-assist information of at least one interference base station, wherein resource shared by each interference base station is mutually just
It hands over, described method includes following steps:
X1. auxiliary to first user equipment transmission network with scheduled transmission mode in the resource shared by the interference base station
Supplementary information, the network-assist information includes the public information of the interfered cell of the interference base station and the interference base station is institute
State the second Downlink Control Information of at least one second user equipment generation.
7. according to the method described in claim 6, it is characterized in that, the scheduled transmission mode includes scheduled antenna port
Configuration and scheduled modulation system.
8. according to the method described in claim 6, it is characterized in that, the public information of the interfered cell includes PSS/SSS's
The scheduling information of configuration information, the configuration information of PBCH and/or EPDCCH.
9. a kind of method for carrying out inter-cell interference cancellation in the first user equipment, wherein first user equipment is by taking
Business base station is administered and is used by least one of at least one interfered cell administered by least one interference base station second
The potential interference of family equipment, it is auxiliary to transmit the network of at least one interference base station that predetermined resource is reserved on running time-frequency resource
Supplementary information, and resource shared by each interference base station is mutually orthogonal, and described method includes following steps:
S1. receiving the serving BS from the serving BS is the first downlink control letter that first user equipment generates
Breath, and network-assist information is received from the serving BS based on scheduled transmission mode, the network-assist information includes
The public information of at least one interfered cell and at least one described interference base station are that at least one described second user is set
Standby the second Downlink Control Information generated；And
S2. based under first Downlink Control Information, the public information of at least one interfered cell and described second
Row control information carries out inter-cell interference cancellation,
Wherein, the step S2 further comprises:
S21. the interference base station that interference is generated to it is determined according to pre-defined rule；And
S22. based on the public information of interfered cell of first Downlink Control Information, identified interference base station and described
Identified interference base station is that the second Downlink Control Information progress minizone that at least one described second user equipment generates is dry
Disturb elimination.
10. according to the method described in claim 9, it is characterized in that, the scheduled transmission mode includes scheduled antenna end
Mouth configuration and scheduled modulation system.
11. according to the method described in claim 9, it is characterized in that, the public information of the interfered cell includes PSS/SSS's
The scheduling information of configuration information, the configuration information of PBCH and/or EPDCCH.
12. a kind of assist the first user equipment progress inter-cell interference to disappear in the serving BS for administering the first user equipment
The method removed, wherein first user equipment is by least one interfered cell administered by least one interference base station
At least one second user equipment potential interference, predetermined resource is reserved on running time-frequency resource come transmit it is described at least one
The network-assist information of interference base station, and resource shared by each interference base station is mutually orthogonal, and the method includes walking as follows
It is rapid:
I. network-assist information is received from least one described interference base station, the network-assist information includes the dry of interference base station
The public information and the interference base station for disturbing cell are the second downlink control letter that at least one described second user equipment generates
Breath；And
Ii. sending the serving BS to first user equipment is the first downlink control that first user equipment generates
Information, and the network-assist information is sent to first user equipment based on scheduled transmission mode.
13. a kind of method for assisting the first user equipment to carry out inter-cell interference cancellation in interference base station, wherein the interference
At least one second user equipment is administered in base station, at least one described second user equipment generates first user equipment latent
It is interfering, first user equipment is located in the cell administered by serving BS, and predetermined resource is reserved on running time-frequency resource
Transmit the network-assist information of at least one interference base station, and resource shared by each interference base station is mutually orthogonal,
Described method includes following steps:
Network-assist information is sent to the serving BS, the network-assist information includes the interfered cell of the interference base station
Public information and the interference base station be the second Downlink Control Information that at least one described second user equipment generates.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310413595.9A CN104469813B (en) | 2013-09-12 | 2013-09-12 | A method of carrying out inter-cell interference cancellation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310413595.9A CN104469813B (en) | 2013-09-12 | 2013-09-12 | A method of carrying out inter-cell interference cancellation |
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| CN104469813B true CN104469813B (en) | 2019-01-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20160380657A1 (en) * | 2015-06-26 | 2016-12-29 | Intel IP Corporation | Interference cancellation |
| CN108738042A (en) * | 2017-04-24 | 2018-11-02 | 华为技术有限公司 | A kind of interference elimination method, user equipment and the network equipment |
| WO2020056761A1 (en) * | 2018-09-21 | 2020-03-26 | Qualcomm Incorporated | Victim interference mitigation in remote interference management frameworks |
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| US9386535B2 (en) * | 2011-10-26 | 2016-07-05 | Lg Electronics Inc. | Method for determining transmission power information of downlink subframe and apparatus therefor |
| CN103220803A (en) * | 2012-01-19 | 2013-07-24 | 上海贝尔股份有限公司 | Cell reference signal interference elimination method |
| WO2013133626A1 (en) * | 2012-03-06 | 2013-09-12 | 엘지전자 주식회사 | Method and device for transmitting channel state information in wireless communication system |
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