CN104811944A - Network auxiliary interference inhibition method - Google Patents

Network auxiliary interference inhibition method Download PDF

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Publication number
CN104811944A
CN104811944A CN201410032810.5A CN201410032810A CN104811944A CN 104811944 A CN104811944 A CN 104811944A CN 201410032810 A CN201410032810 A CN 201410032810A CN 104811944 A CN104811944 A CN 104811944A
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China
Prior art keywords
subscriber equipment
interference
base station
message
interfered
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CN201410032810.5A
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Chinese (zh)
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CN104811944B (en
Inventor
蒋琦
刘铮
黄晟锋
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Nokia Shanghai Bell Co Ltd
Alcatel Lucent SAS
Alcatel Optical Networks Israel Ltd
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Alcatel Lucent Shanghai Bell Co Ltd
Alcatel Optical Networks Israel Ltd
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Application filed by Alcatel Lucent Shanghai Bell Co Ltd, Alcatel Optical Networks Israel Ltd filed Critical Alcatel Lucent Shanghai Bell Co Ltd
Priority to CN201410032810.5A priority Critical patent/CN104811944B/en
Priority to TW104100403A priority patent/TW201601477A/en
Priority to PCT/IB2015/000150 priority patent/WO2015110911A1/en
Publication of CN104811944A publication Critical patent/CN104811944A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J11/00Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023Interference mitigation or co-ordination
    • H04J11/005Interference mitigation or co-ordination of intercell interference
    • H04J11/0059Out-of-cell user aspects

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a network auxiliary interference inhibition method, for reducing interference on disturbed user equipment in a wireless communication system. The distributed user equipment is disturbed by at least one piece of user equipment generating the interference from other cells. The method comprises: the disturbed user equipment receiving a first message sent by the service base station of the user equipment generating the interference, wherein the first message comprises content correlated with blind decoding of scheduling information of the user equipment generating the interference; and the disturbed user equipment, according to the first message, blindly decoding the scheduling information of the user equipment generating the interference on a physical downlink control channel of the service base station of the user equipment generating the interference.

Description

A kind of network assistance disturbance restraining method
Technical field
The present invention relates to communication technical field, particularly relate to wireless communication technology field.
Background technology
At wireless communication field, problem of inter-cell interference is the focus direction of Recent study all the time.Especially along with isomerism network structure application increasingly extensive, how solving powerful macrocell has become realistic problem urgently to be resolved hurrily to the presence of intercell interference that lower powered Microcell is caused.Industry it is also proposed many solutions targetedly.Such as, in the 3 gpp specifications, just have employed the modes such as such as coordinating district interference (Inter-Cell InterferenceCoordination is called for short ICIC) technology to reduce the impact of presence of intercell interference on radio communication.
But, along with the further growth of wireless traffic particularly wireless data service, the capacity requirement of wireless communication system is also improved thereupon.Higher cell density has become the target of necessary realization with the spectrum efficiency of Geng Gao.The thing followed, cochannel interference (Co-channelInterference) becomes the main unfavorable factor of decision systems performance gradually, no matter this point is for presence of intercell interference, or the intra-cell users of scheduling (Co-scheduled) is altogether all identical.In order to solve the problem of cochannel interference, industry conducts extensive research, and result shows, carrying out AF panel/elimination (Interferencesuppression/cancellation) at receiving terminal can provide considerable performance gain.Thus the research direction suppressing (Network-Assisted Interference CancellationSuppression is called for short NAICS) as LTE system evolution has been eliminated in network assistance interference by 3GPP.
In a typical NAICS application scenarios, victim user equipment (victim userequipment be called for short victim UE) is due to the certain user's equipment use with neighbouring neighbor cell identical Physical Resource Block (physical resource block is called for short PRB), and the cochannel thus received from neighbor cell disturbs.Obviously, in order to realize NAICS on victim UE, this victim UE must be known the downlink transfer parameter of neighbor cell thus eliminate/suppress operation accordingly.And the solution of existing 3GPP specification to this step is that wherein semi-static parameter is transferred to victim UE by top signaling; And all the other dynamic parameters, typically, the parameters such as the schedule information of those subscriber equipmenies of interference are produced in neighbor cell, then obtained by the information of the Physical Downlink Control Channel (physical downlink control channel is called for short PDCCH) of this victim UE blind decoding neighbor cell, namely this victim UE needs the descending information controlling instruction (downlink control indicator is called for short DCI) part of the PDCCH of blind decoding neighbor cell.Obviously, consider the quantity of the UE that may produce interference and the dynamic change of schedule information, need the number of times allowing victim UE carry out blind decoding can be surprising, this seems simple step can become very difficult in realization, accordingly, increase a large amount of complexities will to the design of UE, to such an extent as to cannot practical application, must be improved.
So target of the present invention is exactly find a kind of novel NAICS method; This method needs to make victim UE when reducing the number of times of blind decoding PDCCH operation, just can obtain corresponding schedule information, thus can realize NAIC function in comparatively simple mode in UE side; Also will compatible as much as possible existing specification, avoid the change of existing protocol excessive.
Summary of the invention
For solving the aforementioned problems in the prior, the present invention proposes a kind of novel NAICS method.Be used for by the DCI format that design in the public search space (common searching space is called for short CSS) is special the information transmitting auxiliary blind decoding operation to victim UE, thus effectively decrease the blind decoding number of times that victim UE needs to carry out.
Particularly, according to a first aspect of the invention, propose a kind of method subscriber equipment be interfered in a wireless communication system reducing interference, wherein, the described subscriber equipment be interfered is subject to the interference of the subscriber equipment that at least one generation from other community is disturbed, described method comprises: described in the subscriber equipment that is interfered receive the first message sent from the described serving BS producing the subscriber equipment of interference, wherein, described first message comprises the content relevant with the schedule information of the subscriber equipment producing interference described in blind decoding; The described subscriber equipment be interfered, according to described first message, the described Physical Downlink Control Channel producing the serving BS of the subscriber equipment of interference produces described in blind decoding the schedule information of the subscriber equipment of interference.
Preferably, described first message is Downlink Control Information.
More preferably, described first message is sent by public search space.
More preferably, the content that the schedule information of the described subscriber equipment with producing interference described in blind decoding is relevant comprises: the described Cell Radio Network Temporary Identifier/Identity, Cell-RNTI producing the subscriber equipment disturbed; The described suggestion polymerization rank producing the subscriber equipment of interference, wherein, described suggestion polymerization rank represents the described polymerization rank producing the serving BS override configuration of the subscriber equipment of interference.
More preferably, the subscriber equipment of the subscriber equipment be interfered described in and described generation interference uses same physical resource set of blocks.
More preferably, described same physical resource set of blocks is determined by the serving BS cooperation of the serving BS of the described subscriber equipment be interfered and the subscriber equipment of described generation interference.
More preferably, described same physical resource set of blocks is determined by X2 interface Message Cooperation by the serving BS of the serving BS of the described subscriber equipment be interfered and the subscriber equipment of described generation interference.
According to a second aspect of the invention, propose a kind of auxiliary method reducing interference on base station in a wireless communication system, wherein, at least one subscriber equipment at least one subscriber equipment to other community of described base station service creates interference, described method comprises: described base station sends the first message, wherein, described first message comprise to serve with base station described in blind decoding described in the relevant content of the schedule information of at least one subscriber equipment.
Preferably, described first message is Downlink Control Information.
More preferably, described first message is sent by public search space.
More preferably, the described content relevant with the schedule information of at least one subscriber equipment described that base station described in blind decoding is served comprises: the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI of at least one subscriber equipment described that described base station is served; The suggestion polymerization rank of at least one subscriber equipment described of described base station service, wherein, described suggestion polymerization rank represents the polymerization rank of described base station override configuration.
More preferably, at least one subscriber equipment described of described base station service and at least one subscriber equipment of other community described use same physical resource set of blocks.
More preferably, described same physical resource set of blocks is cooperated by the serving BS of at least one subscriber equipment of described base station and other community described and determines.
More preferably, described same physical resource set of blocks is determined by X2 interface Message Cooperation by the serving BS of at least one subscriber equipment of described base station and other community described.
According to a third aspect of the invention we, propose the equipment a kind of subscriber equipment be interfered in a wireless communication system reducing interference, wherein, the described subscriber equipment be interfered is subject to the interference of the subscriber equipment that at least one generation from other community is disturbed, described equipment comprises: receiver module, the first message sent from the described serving BS producing the subscriber equipment of interference is received for the described subscriber equipment be interfered, wherein, described first message comprises the content relevant with the schedule information of the subscriber equipment producing interference described in blind decoding; Blind decoding module, for the described subscriber equipment be interfered according to described first message, the described Physical Downlink Control Channel producing the serving BS of the subscriber equipment of interference produces described in blind decoding the schedule information of the subscriber equipment of interference.
According to a forth aspect of the invention, propose the auxiliary equipment reducing interference on a kind of base station in a wireless communication system, wherein, at least one subscriber equipment at least one subscriber equipment to other community of described base station service creates interference, described equipment comprises: sending module, send the first message for described base station, wherein, described first message comprise to serve with base station described in blind decoding described in the relevant content of the schedule information of at least one subscriber equipment.
In the present invention, by designing new DCI in CSS, make interference base station the relevant parameter of interference UE can be passed to victim UE, thus make victim UE can be obtained the scheduling parameter of interference UE by the operation of less blind decoding, and then realize NAICS function; In preferred scheme, can also determine by simple cooperation between base stations the UE producing cochannel interference, further simplify the workflow of system; And farthest compatible existing specification, avoid the excessive change to agreement, thus reach object of the present invention.
Accompanying drawing explanation
Read the following detailed description to non-limiting example by referring to accompanying drawing, further feature of the present invention, object and advantage will be more obvious.
Fig. 1 shows the flow chart according to a kind of subscriber equipment be interfered in a wireless communication system of the present invention reducing the method for interference;
Fig. 2 shows according to the flow chart reducing the method for interference auxiliary on a kind of base station in a wireless communication system of the present invention;
Fig. 3 shows the block diagram according to a kind of subscriber equipment be interfered in a wireless communication system of the present invention reducing the equipment of interference;
Fig. 4 shows according to the block diagram reducing the equipment of interference auxiliary on a kind of base station in a wireless communication system of the present invention.
Wherein, same or analogous Reference numeral represents same or analogous steps characteristic or device/module.
Embodiment
In the specific descriptions of following preferred embodiment, with reference to the accompanying drawing formed appended by a part of the present invention.Appended accompanying drawing shows by way of example and can realize specific embodiment of the present invention.The embodiment of example is not intended to limit according to all embodiments of the present invention.Be appreciated that under the prerequisite not departing from scope of the present invention, other embodiments can be utilized, also can carry out amendment that is structural or logicality.Therefore, following specific descriptions are also nonrestrictive, and scope of the present invention limited by appended claim.
First, there is a victim UE in application according to the present invention scene, and this victim UE is identical with some UE (being referred to as to disturb UE) of neighbor cell due to the PRB used, and therefore can be subject to the Co-channel interference of these interference UE.Therefore, this victim UE needs to carry out blind decoding operation on the PDCCH channel of the serving BS (being referred to as interference base station) of these interference UE, follow-up for NAICS function with the corresponding schedule information obtaining interference UE.
On this basis, according to one embodiment of present invention, a kind of method reducing interference on victim UE is proposed.Concrete, first this victim UE receives the first message sent from interference base station, contains the information that this victim UE can be assisted to carry out blind decoding operation in this first message; Then carry out blind decoding operation targetedly according to the supplementary received thus obtain corresponding schedule information by less blind decoding number of times.
Preferably, this first information can be a kind of new DCI of the CSS of the PDCCH channel being arranged in interference base station.This DCI is not the concrete schedule information of certain UE, but one group of UE, i.e. the blind decoding supplementary of all interference UE.
Further, the supplementary comprised can comprise:
The Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Cell-radio networktemporary indicator is called for short C-RNTI) of-interference UE; And
-interference UE suggestion polymerization rank (Aggressive level is called for short AL), wherein, described suggestion AL represents the AL that interference base station is the configuration of interference UE override.Obviously, this means that interference base station uses this suggestion AL to send and disturbs the possibility of the schedule information of UE maximum on PDccH channel.
Therefore, for this victim UE, when having known C-RNTI and the suggestion AL of interference UE, just can select above-mentioned known C-RNTI when the PDCCH channel of blind decoding interference base station and preferentially having attempted this suggestion AL, having carried out blind decoding operation.Obviously, this means that the number of times of the blind decoding operation that victim UE needs to carry out declines greatly.
In order to further simplification, victim UE and interference UE can also be limited and use identical PRB set.Like this, for the serving BS of community, victim UE place, if belong to this set to the PRB that in community, certain UE dispatches, then this UE just becomes victim UE, may need to use NAICS function; And corresponding, for interference base station, if belong to this set to the PRB that in community, certain UE dispatches, then this UE just becomes interference UE, needs the supplementary about this interference of blind decoding UE schedule information to be sent by the first message.The scheduling of resource of such two base stations just becomes quite simple, thus decreases unnecessary overhead.
Preferably, can also determine that this PRB gathers by the cooperation of two cell base stations, thus meet the needs of flexible dispatching, improve the service efficiency of resource.
Further, can complete above-mentioned cooperation by the X2 interface message between base station, the benefit of design like this can continue to use existing Signaling to greatest extent and without the need to using a brand-new signaling system.
Fig. 1 illustrates the flow chart according to above-mentioned execution mode, comprising:
S11. the subscriber equipment be interfered described in receives the first message sent from the described serving BS producing the subscriber equipment of interference, and wherein, described first message comprises the content relevant with the schedule information of the subscriber equipment producing interference described in blind decoding;
S12. the subscriber equipment be interfered described in, according to described first message, the described Physical Downlink Control Channel producing the serving BS of the subscriber equipment of interference produces described in blind decoding the schedule information of the subscriber equipment of interference.
Corresponding, according to another embodiment of the invention, propose a kind of method of auxiliary minimizing interference on interference base station.Concrete, this interference base station sends the first message, contains the information that victim UE can be assisted to carry out blind decoding operation in this first message.
Preferably, this first information can be a kind of new DCI of the CSS of the PDCCH channel being arranged in interference base station.This DCI is not the concrete schedule information of certain UE, but one group of UE, i.e. the blind decoding supplementary of all interference UE.
Further, the supplementary comprised can comprise:
The Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Cell-radio networktemporary indicator is called for short C-RNTI) of-interference UE; And
-interference UE suggestion polymerization rank (Aggressive level is called for short AL), wherein, described suggestion AL represents the AL that interference base station is the configuration of interference UE override.Obviously, this means that interference base station uses this suggestion AL to send and disturbs the possibility of the schedule information of UE maximum on PDCCH channel.
Same, for victim UE, when having known the C-RNTI and suggestion AL that disturb UE, just can select known C-RNTI when the PDCCH channel of blind decoding interference base station and preferential trial suggestion AL, having carried out blind decoding operation.Obviously, this means that the number of times of the blind decoding operation that victim UE needs to carry out declines greatly.
In order to further simplification, victim UE and interference UE can also be limited and use identical PRB set.Like this, for the serving BS of community, victim UE place, if belong to this set to the PRB that in community, certain UE dispatches, then this UE just becomes victim UE, may need to use NAICS function; And corresponding, for interference base station, if belong to this set to the PRB that in community, certain UE dispatches, then this UE just becomes interference UE, needs the supplementary about this interference of blind decoding UE schedule information to be sent by the first message.The scheduling of resource of such two base stations just becomes quite simple, thus decreases unnecessary overhead.
Preferably, can also determine that this PRB gathers by the cooperation of two cell base stations, thus meet the needs of flexible dispatching, improve the service efficiency of resource.
Further, can complete above-mentioned cooperation by the X2 interface message between base station, the benefit of design like this can continue to use existing Signaling to greatest extent and without the need to using a brand-new signaling system.
Figure 2 shows the flow chart according to above-mentioned execution mode, comprising:
S21. described base station sends the first message, wherein, described first message comprise to serve with base station described in blind decoding described in the relevant content of the schedule information of at least one subscriber equipment.
Below to come again in conjunction with block diagram, to introduce the equipment corresponding with said method provided by the present invention, in view of the steps characteristic in unit/device characteristic wherein and said method has corresponding relation, will conform to the principle of simplicity.
Figure 3 show the equipment 30 according to a kind of subscriber equipment be interfered in a wireless communication system of the present invention reducing interference, wherein, the described subscriber equipment be interfered is subject to the interference of the subscriber equipment that at least one generation from other community is disturbed, and described equipment 30 comprises:
Receiver module 3001, the first message sent from the described serving BS producing the subscriber equipment of interference is received for the described subscriber equipment be interfered, wherein, described first message comprises the content relevant with the schedule information of the subscriber equipment producing interference described in blind decoding; And
Blind decoding module 3002, for the described subscriber equipment be interfered according to described first message, the described Physical Downlink Control Channel producing the serving BS of the subscriber equipment of interference produces described in blind decoding the schedule information of the subscriber equipment of interference.
Fig. 4 illustrate according to the equipment 40 reducing interference auxiliary on a kind of base station in a wireless communication system of the present invention, wherein, at least one subscriber equipment at least one subscriber equipment to other community of described base station service creates interference, and described equipment 40 comprises:
Sending module 4001, sends the first message for described base station, wherein, described first message comprise to serve with base station described in blind decoding described in the relevant content of the schedule information of at least one subscriber equipment.
Be described embodiments of the invention above, but the present invention is not limited to specific system, equipment and concrete agreement, those skilled in that art can make various distortion or amendment within the scope of the appended claims.
The those skilled in the art of those the art can pass through research specification, disclosed content and accompanying drawing and appending claims, understand and implement other changes to the execution mode disclosed.In the claims, word " comprises " element and step of not getting rid of other, and wording " one " does not get rid of plural number.In the present invention, " first ", " second " only represent title, do not represent orbution.In the practical application of invention, the function of the multiple technical characteristics quoted during a part possibility enforcement of rights requires.Any Reference numeral in claim should not be construed as the restriction to scope.

Claims (16)

1. the subscriber equipment be interfered in a wireless communication system reduces a method for interference, wherein, described in the subscriber equipment that is interfered be subject to the interference of the subscriber equipment that at least one generation from other community is disturbed, described method comprises:
A. the subscriber equipment be interfered described in receives the first message sent from the described serving BS producing the subscriber equipment of interference, and wherein, described first message comprises the content relevant with the schedule information of the subscriber equipment producing interference described in blind decoding;
B. the subscriber equipment be interfered described in, according to described first message, the described Physical Downlink Control Channel producing the serving BS of the subscriber equipment of interference produces described in blind decoding the schedule information of the subscriber equipment of interference.
2. method according to claim 1, wherein, described first message is Downlink Control Information.
3. method according to claim 2, wherein, described first message is sent by public search space.
4. method according to claim 1, wherein, the content that the schedule information of the described subscriber equipment with producing interference described in blind decoding is relevant comprises:
The described Cell Radio Network Temporary Identifier/Identity, Cell-RNTI producing the subscriber equipment of interference;
The described suggestion polymerization rank producing the subscriber equipment of interference, wherein, described suggestion polymerization rank represents the described polymerization rank producing the serving BS override configuration of the subscriber equipment of interference.
5. method according to claim 1, wherein, described in the subscriber equipment of the subscriber equipment that is interfered and described generation interference use same physical resource set of blocks.
6. method according to claim 5, wherein, the serving BS of the subscriber equipment that described same physical resource set of blocks is disturbed by serving BS and the described generation of the described subscriber equipment be interfered cooperates and determines.
7. method according to claim 6, wherein, the serving BS of the subscriber equipment that described same physical resource set of blocks is disturbed by serving BS and the described generation of the described subscriber equipment be interfered is determined by X2 interface Message Cooperation.
8. the auxiliary method reducing interference on base station in a wireless communication system, wherein, at least one subscriber equipment at least one subscriber equipment to other community of described base station service creates interference, and described method comprises:
A. described base station sends the first message, wherein, described first message comprise to serve with base station described in blind decoding described in the relevant content of the schedule information of at least one subscriber equipment.
9. method according to claim 8, wherein, described first message is Downlink Control Information.
10. method according to claim 9, wherein, described first message is sent by public search space.
11. methods according to claim 8, wherein, the described content relevant with the schedule information of at least one subscriber equipment described that base station described in blind decoding is served comprises:
The Cell Radio Network Temporary Identifier/Identity, Cell-RNTI of at least one subscriber equipment described of described base station service;
The suggestion polymerization rank of at least one subscriber equipment described of described base station service, wherein, described suggestion polymerization rank represents the polymerization rank of described base station override configuration.
12. methods according to claim 8, wherein, at least one subscriber equipment described of described base station service and at least one subscriber equipment of other community described use same physical resource set of blocks.
13. methods according to claim 12, wherein, described same physical resource set of blocks is cooperated by the serving BS of at least one subscriber equipment of described base station and other community described and determines.
14. methods according to claim 13, wherein, described same physical resource set of blocks is determined by X2 interface Message Cooperation by the serving BS of at least one subscriber equipment of described base station and other community described.
15. 1 kinds of subscriber equipmenies be interfered in a wireless communication system reduce the equipment of interference, wherein, described in the subscriber equipment that is interfered be subject to the interference of the subscriber equipment that at least one generation from other community is disturbed, described equipment comprises:
Receiver module, the first message sent from the described serving BS producing the subscriber equipment of interference is received for the described subscriber equipment be interfered, wherein, described first message comprises the content relevant with the schedule information of the subscriber equipment producing interference described in blind decoding;
Blind decoding module, for the described subscriber equipment be interfered according to described first message, the described Physical Downlink Control Channel producing the serving BS of the subscriber equipment of interference produces described in blind decoding the schedule information of the subscriber equipment of interference.
16. 1 kinds of auxiliary equipment reducing interference on base station in a wireless communication system, wherein, at least one subscriber equipment at least one subscriber equipment to other community of described base station service creates interference, and described equipment comprises:
Sending module, sends the first message for described base station, wherein, described first message comprise to serve with base station described in blind decoding described in the relevant content of the schedule information of at least one subscriber equipment.
CN201410032810.5A 2014-01-23 2014-01-23 A kind of network assistance disturbance restraining method Active CN104811944B (en)

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CN201410032810.5A CN104811944B (en) 2014-01-23 2014-01-23 A kind of network assistance disturbance restraining method
TW104100403A TW201601477A (en) 2014-01-23 2015-01-07 Network auxiliary interference inhibition method
PCT/IB2015/000150 WO2015110911A1 (en) 2014-01-23 2015-01-08 Method for network-assisted interference suppression

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CN104811944B (en) 2018-08-21
WO2015110911A1 (en) 2015-07-30

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