CN101686550B - Inter-cell interference suppression method, system and base station and user terminal - Google Patents
Inter-cell interference suppression method, system and base station and user terminal Download PDFInfo
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Abstract
The embodiment of the invention discloses an inter-cell interference suppression method, a system and base station and a user terminal, relating to communication filed. The invention solves the problem of too much network communication resource occupation caused by a great amount of scheduling information required to be transported among cell base stations. The inter-cell interference suppression method comprises the following steps: determining an interference cell; acquiring the scheduling information of an interference terminal meeting a terminal constraint condition in the interference cell; and carrying out interference suppression operation on user terminals meeting the terminal constraint condition in the original cell according to the scheduling information of the interference terminal. The technical scheme provided by the embodiment of the invention can be applied in 3G network and next generation wireless network.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of inter-cell interference restraint method, device and system.
Background technology
The method of channeling is adopted to avoid presence of intercell interference (Inter-cell Interference, ICI) existing cell mobile communication systems (as 3G system).Wherein, frequency reuse is particular value: 1,3 or 7, when described frequency reuse is set to 3 or 7, effectively can suppress presence of intercell interference, but now, the spectrum efficiency lower (being only 1/3 or 1/7 of total frequency spectrum efficiency) of each community use.In order to improve the availability of frequency spectrum of Radio Resource, under normal circumstances, frequency reuse is set to 1, now each community can use all frequency band transmission information, but, in this case, presence of intercell interference can be produced, especially when junction, two neighbor cells uses same spectrum resources, can produce stronger presence of intercell interference, the QoS of customer of cell edge reduces.
At present, mainly can be suppressed presence of intercell interference by three kinds of modes, respectively: interference randomization, interference coordination and interference are eliminated.Wherein, described interference randomization can not reduce the energy of interference, but can be " white noise " by interference randomization, thus suppresses the harm of presence of intercell interference, is also called " interference whitening "; Described interference coordination can coordinate frequency resource and the power resource of former community and interfered cell use, makes described former community and interfered cell use different frequency resources and power resource, thus reaches the object suppressing presence of intercell interference; Described interference elimination derives from multiuser detection, can by the signal receiving of interfered cell, decode, copy, deduct in the signal that Bing Congyuan community receives.
Prior art passes through the schedule information of method to former cell transmission interfered cell of transmitting channel information and user profile between former community and the base station of interfered cell, former cell base station can carry out corresponding AF panel operation according to described schedule information, such as interference coordination or interference cancellation operation etc.
Realizing in process of the present invention, inventor finds, at least there are the following problems for prior art: need between base station to transmit a large amount of schedule informations, take too much Internet resources.
Summary of the invention
Embodiments of the invention provide a kind of inter-cell interference restraint method, system and base station, user terminal, and the Internet resources taken are less.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of inter-cell interference restraint method, comprising: determine interfered cell; Obtain the schedule information of the interfered with terminal meeting end conswtraint condition in described interfered cell; Schedule information according to described interfered with terminal carries out AF panel operation to the user terminal meeting described end conswtraint condition in former community.
A kind of base station, comprising:
End conswtraint condition storage unit, for storage terminal constraints;
Interfered cell determining unit, for determining interfered cell;
Schedule information acquiring unit, for obtaining the schedule information of the interfered with terminal meeting end conswtraint condition in described interfered cell;
AF panel unit, carries out AF panel operation for the schedule information according to described interfered with terminal to the user terminal meeting described end conswtraint condition in former community.
A kind of presence of intercell interference suppresses system, comprising:
Former cell base station, for determining interfered cell, obtain the schedule information of the interfered with terminal meeting end conswtraint condition in described interfered cell, the schedule information according to described interfered with terminal carries out AF panel operation to the user terminal meeting described end conswtraint condition in former community;
Base station, more than one interfered cell, for obtaining the schedule information of the interfered with terminal meeting end conswtraint condition, and sends to described former cell base station by this schedule information.
The inter-cell interference restraint method that the embodiment of the present invention provides, device and system, owing to pre-setting end conswtraint condition, so, can only transmit the schedule information of the interfered with terminal meeting end conswtraint condition when carrying out transmitting scheduling information, relative to prior art, the resource shared by transmitting scheduling information is less.
Embodiments of the invention also provide a kind of inter-cell interference restraint method, device and system, and the Internet resources taken are less.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of inter-cell interference restraint method, comprising: the identification information receiving interfered with terminal; The schedule information of interfered with terminal is obtained according to described identification information; The interference signal of interfered with terminal is obtained according to described schedule information; Described interference signal is eliminated from the signal that user terminal receives.
A kind of user terminal, comprising:
Identification information receiving element, for receiving the identification information of interfered with terminal;
Schedule information acquiring unit, for obtaining the schedule information of interfered with terminal according to described identification information;
Interference signal acquiring unit, for obtaining the interference signal of interfered with terminal according to described schedule information;
Interference cancellation unit, for eliminating described interference signal from the signal that user terminal receives.
A kind of presence of intercell interference suppresses system, comprising:
First base station, for sending the identification information of interfered with terminal to user terminal;
Second base station, for receiving the schedule information of the described interfered with terminal that described user terminal obtains according to the identification information of interfered with terminal, obtaining interference signal according to this schedule information, described interference signal being eliminated from the signal of described user terminal.
The inter-cell interference restraint method that the embodiment of the present invention provides, device and system, user terminal in former community can obtain the schedule information of interfered with terminal according to the identification information of the interfered with terminal received, and carry out interference cancellation operation according to this schedule information acquisition interference signal, compared with prior art, Internet resources shared by the identification information of transmission disturbance terminal are less, reach the object of saving Internet resources.
Accompanying drawing explanation
The inter-cell interference restraint method flow chart that Fig. 1 provides for the embodiment of the present invention;
The inter-cell interference restraint method first embodiment flow chart that Fig. 2 provides for the embodiment of the present invention;
The inter-cell interference restraint method second embodiment flow chart that Fig. 3 provides for the embodiment of the present invention;
The architecture of base station schematic diagram one that Fig. 4 provides for the embodiment of the present invention;
The architecture of base station schematic diagram two that Fig. 5 provides for the embodiment of the present invention;
Interference cancellation unit 4042 structural representation in the base station that Fig. 6 provides for the embodiment of the present invention shown in Fig. 5;
The presence of intercell interference that Fig. 7 provides for the embodiment of the present invention suppresses system configuration schematic diagram;
The inter-cell interference restraint method flow chart that Fig. 8 provides for another embodiment of the present invention;
The user terminal structural representation that Fig. 9 provides for the embodiment of the present invention;
The presence of intercell interference that Figure 10 provides for another embodiment of the present invention suppresses system configuration schematic diagram.
Embodiment
In order to solve prior art when carrying out presence of intercell interference and suppressing, need to transmit a large amount of schedule information between cell base station, cause the problem that the networked communication resource that takies is too much, the embodiment of the present invention provides a kind of inter-cell interference restraint method, device and system.
Community described in the embodiment of the present invention can be in esse community, the virtual subdistrict that also can be made up of more than one access point (AP), below in an example, is all that in esse community is described for described community.
As shown in Figure 1, the inter-cell interference restraint method that the embodiment of the present invention provides, comprising:
Step 101, determines interfered cell.
In the present embodiment, described step 101 can determine interfered cell, Yi Zhongshi by two kinds of methods: the cell ID information according to the interfered cell that former cell base station prestores determines interfered cell; Another kind is: receive the cell ID information that interfered cell sends, determine interfered cell according to this cell ID information.Described step 101 can by wherein interfered cell is determined in any one or combination.
The cell ID information of the described interfered cell prestored can be stored by the mode of static state, as: store when the network planning; Also can be stored by semi-static mode, as: notify former cell base station by interfered cell by dominant signaling or recessiveness.The cell ID information of the described interfered cell prestored can upgrade, and the concrete grammar of renewal can be identical with the storage means introduced above, do not repeat herein.
Step 102, obtains the schedule information of the interfered with terminal meeting end conswtraint condition in described interfered cell, comprising:
First, the interfered with terminal meeting end conswtraint condition is determined;
Described end conswtraint condition can be that this cell signal power received according to UE is arranged, as: according to this cell signal strong and weak difference that UE receives, the UE in community is divided into some groups, comprise: general UE group and need to carry out the UE group etc. of AF panel, retrain the UE group that interfered with terminal is arranged in described AF panel; Also can be arrange according to the physical location at UE place; Can also arrange by other means, often kind of situation not repeated one by one herein;
In the present embodiment, former cell base station can obtain the UE ID (identification information) meeting the interfered with terminal of end conswtraint condition of interfered cell in advance by static or semi-static mode, determine interfered with terminal according to this UE ID; The UE ID that also can send in real time according to interfered cell determines interfered with terminal, and wherein UE ID can be carried in schedule information, also can individual transmission.Wherein, the UE ID of the interfered with terminal determined according to end conswtraint condition determination interfered with terminal, and is sent to former cell base station by interfered cell in real time, and former cell base station determines interfered with terminal according to this UE ID;
Then, the schedule information of described interfered with terminal is obtained.
Former cell base station can obtain according to the interfered cell ID obtained when determining interfered cell in step 101 channel sequence information bound with this interfered cell ID, and obtains the schedule information of interfered with terminal in interfered cell according to this sequence information.In the present embodiment, former cell base station also directly can receive the schedule information of described interfered with terminal from base station, interfered cell.
Wherein, described schedule information can comprise any one or the two or more combinations in following information: resource block information (RB), channel information, sequence information, modulation coding mode information (MCS), antenna mode information, multiple-input and multiple-output (MIMO) pattern information, pilot frequency information (RS), frequency hopping pattern information or UE ID etc.
Step 103, schedule information according to described interfered with terminal carries out AF panel operation to the user terminal meeting described end conswtraint condition in former community, comprise: interference coordination is carried out to described user terminal, as: according to as described in the schedule information of interfered with terminal, the channel dispatch described interfered with terminal and user terminal used is on different RB; For another example: according to the schedule information of described interfered with terminal, be described user terminal Resources allocation jointly by former community and interfered cell, such as RB resource or other resources; And for example: according to the schedule information of described interfered with terminal, by described interfered with terminal with the channel dispatch that user terminal uses on identical RB, and the power used is different; Or according to the schedule information of described interfered with terminal, obtain the interference signal of interfered with terminal, interference is carried out to described user terminal and eliminates.
In the present embodiment, when the method adopting interference to eliminate carries out AF panel to described user terminal, if when the channel of described interfered with terminal is different with the RB that described user terminal originally used, can also comprise: according to the schedule information of described interfered with terminal, by described interfered with terminal and scheduling of user terminals to identical or have on the RB of inclusion relation.
Above-described embodiment, owing to pre-setting end conswtraint condition, so when carrying out presence of intercell interference and suppressing, the schedule information of transmission is less, and relative to prior art, the resource shared by transmitting scheduling information is less.
In another embodiment provided by the invention, in order to reduce the schedule information quantity transmitted between former cell base station and base station, interfered cell, save networked communication resource, can also pre-set scheduling resource constraints, this scheduling resource constraints can retrain scheduling resource described in above embodiment.Such as: RB resource is retrained, comprise the position or size etc. of RB resource are retrained; MCS being retrained, comprising retraining MCS kind or dispatching cycle etc.; To MIMO mode, such as diversity/multiplexing/code book etc., retrain; RS resource is retrained or retrained etc. channel information.
Below by several citing specifically, the scheduling resource constraints that the embodiment of the present invention is arranged is described:
1, RB resource is retrained.
RB resource is divided into some groups, and such as, the purposes according to RB is divided into: support sector divides the RB group of frequency division multiplexing (FFR), supports the RB group that interference is eliminated and general RB group etc.; For another example, the channel distributed according to RB is divided into: control channel high transmitted power RB, the low transmitted power RB of control channel and data channel RB etc.; Wherein, described RB resource Zu Yuan community is identical with the size of interfered cell, or the RB resource group of interfered cell is included in the RB resource group of former community.
By carry out presence of intercell interference suppress the RB used constrain in above-mentioned grouping certain or certain in several groups, as: constraint uses the RB resource supporting the RB group that interference is eliminated to carry out presence of intercell interference suppression.
Making interfered cell not need the RB information used to former cell transmission interfered with terminal by schedule information in real time by retraining RB resource, decreasing the networked communication resource that transmitting scheduling information takies.
2, RS resource is retrained.
RS is divided into some groups, as: support the RS group that interference is eliminated and RS group etc., by carry out presence of intercell interference suppress the RS used constrain in above-mentioned grouping certain or certain in several groups, as: constraint is carried out presence of intercell interference and is suppressed to use the RS group supporting that interference is eliminated, RS in this group keeps orthogonal as far as possible, and the distribution of RS peculiar from community (cell-specific) becomes terminal peculiar (UE-specific) or set of terminal peculiar (UE-group-specific)
Interfered cell is made not need the RS information used to former cell transmission interfered with terminal by schedule information in real time by retraining RS resource, decrease the networked communication resource that transmitting scheduling information takies, former cell base station can detect the RS of use according to the described constraints to RS resource by blind Detecting technology, decrease the complexity of blind Detecting, more easily realize.
3, MCS is retrained.
Define one group or many group MCS tables, when carrying out presence of intercell interference and suppressing, the MCS that former cell base station can adopt the blind Detecting of limited number of time to detect interfered cell from a group of described definition or many group MCS tables to use;
Can also retraining the dispatching cycle of MCS, from crossing the quantity reducing transmission MCS dispatching cycle increasing MCS, reaching the object of saving networked communication resource.
4, channel information is retrained.
Constraint channel information is channel statistical information in measurement period, and can retrain former cell base station and directly carry out estimations acquisition channel information to the channel of interfered cell.
By carrying out the quantity estimating to reduce former cell base station and interfered cell base-station transmission channel information to channel information, thus realize the object of saving networked communication resource.
The above is only be described the partial content of scheduling resource constraint, does not repeat one by one often kind of content herein.
In the present embodiment, described scheduling resource constraints can be stored in former cell base station and base station, interfered cell in advance statically, as when carrying out the network planning, storage is stored in former cell base station and base station, interfered cell statically; Also can by the X2 interface between former cell base station and base station, interfered cell, semi-statically be stored in former cell base station and base station, interfered cell, as as described in having prestored when former cell base station during scheduling resource constraints, described scheduling resource constraints can be sent to base station, interfered cell by X2 interface by described former cell base station, and described scheduling resource constraints is preserved in base station, described interfered cell.
When all storing scheduling resource constraints in former cell base station and base station, interfered cell, base station, interfered cell can be carried out scheduling according to described scheduling resource constraints to interfered with terminal and be arranged, and sends the schedule information of described interfered with terminal to former cell base station; Base station, described interfered cell to be carried out after scheduling arranges to interfered with terminal according to scheduling resource constraints, also the schedule information of described interfered with terminal can not be sent to former cell base station, by former cell base station according to described scheduling resource constraints, adopt the schedule information of interfered with terminal described in blind Detecting technical limit spacing.
The present embodiment, by retraining further the schedule information of interfered cell to the interfered with terminal of former cell transmission, makes the Internet resources shared by transmitting scheduling information less, reaches the object of saving Internet resources further.
The inter-cell interference restraint method that the above-described embodiment of the present invention provides can carry out AF panel to multiple channel, such as: AF panel is carried out to the ascending control channel of user terminal, or AF panel etc. is carried out to the uplink data channels of user terminal.The technical scheme more clearly understood the embodiment of the present invention to enable those skilled in the art and provide, is described in detail to the inter-cell interference restraint method that the embodiment of the present invention provides below by specific embodiment.
Embodiment 1: AF panel is carried out to the ascending control channel of user terminal.
Because described ascending control channel does not do scrambling, it is little that MCS changes kind, and be that code divides and frequency splitting channel, so as shown in Figure 2, the concrete steps of carrying out AF panel comprise:
Step 201, determines interfered cell.
In the present embodiment, interfered cell can be determined according to the cell ID information of the interfered cell prestored in former community; Also can receive the cell ID information that interfered cell sends, determine interfered cell according to this cell ID information; Or interfered cell is determined in the combination according to above-mentioned two kinds of methods.
Step 202, determine that former community needs to carry out the user terminal of AF panel, and interfered cell needs the interfered with terminal of carrying out AF panel.
Can determine according to the end conswtraint condition prestored in former community and interfered cell, after determining, the UE ID of described interfered with terminal can be sent to former community by static or semi-static mode by interfered cell, and the UE ID of described user terminal also can be sent to described interfered cell by static or semi-static mode by described former community.
Step 203, the schedule information of the interfered with terminal that reception interfered cell, former community sends, comprising:
The cell ID information that former community obtains according to step 201 obtains the channel sequence information bound with this community ID, receives the schedule information of the interfered with terminal that interfered cell sends according to described channel sequence information.
In the present embodiment, described schedule information comprises: community ID, RB, sequential shift, antenna mode and UE ID.
Step 204, the schedule information of the interfered with terminal schedule information received in refer step 203 and the user terminal of former community, carries out AF panel operation to the user terminal of former community.
In the present embodiment, described AF panel operation can be interference coordination operation or interference cancellation operation.
When operating for interference coordination, specifically can comprise: the ascending control channel of interfered with terminal and user terminal is dispatched on different RB; Or be described user terminal Resources allocation jointly by former community and interfered cell; Or the ascending control channel of interfered with terminal and user terminal is dispatched on identical RB, and uses different power transmission signal.
When for interference cancellation operation, specifically can comprise: according to the channel information of the ascending control channel of described interfered with terminal, obtain the ascending control channel independently user terminal with described interfered with terminal; According to the schedule information of described interfered with terminal, such as RB, sequential shift and UE ID etc., form AF panel to (as composition MU-MIMO) by interfered with terminal identical for use RB and user terminal; According to the schedule information of described interfered with terminal, obtain the interference signal of described interfered with terminal, described interference signal is eliminated from the signal of described user terminal.
Above-mentioned carry out interference cancellation operation time, if the ascending control channel of described interfered with terminal is different with the RB of user terminal, then can according to the schedule information of described interfered with terminal by described interfered with terminal and scheduling of user terminals to identical or have on the RB of inclusion relation, by described interfered with terminal and user terminal composition AF panel pair, carry out interference cancellation operation.
The channel information that the present embodiment uses for statistics or instantaneous channel information, when described channel information is the channel information of statistics, can reduce the networked communication resource shared by transmitting channel information between former community and interfered cell.Described channel information is directly obtained the channel estimating of interfered cell by former community, and in the use procedure of reality, the information acquisition that described channel information also can be sent by interfered cell, such as, the schedule information sent by interfered cell is obtained.
Embodiment 2: AF panel is carried out to the uplink data channels of user terminal.
Because described uplink data channels needs scrambling, it is more that MCS changes kind, and be frequency splitting channel, so as shown in Figure 3, the concrete steps of carrying out AF panel comprise:
Wherein, described step 301 is identical with 202 with the step 201 in embodiment 1 with 302, does not repeat herein.
Step 303, arranges scheduling resource constraints, and this scheduling resource constraints is kept in former community and interfered cell.
Described scheduling resource constraints can comprise: the constraint to RB resource location and size, the MCS kind to scheduling and the constraint in cycle, the constraint to MIMO mode and the constraint etc. to RS.In the present embodiment, what the cycle of MCS can be arranged is relatively slow, thus reduces the number of times of transmission MCS.
Described scheduling resource constraints can be kept in former community and interfered cell by static mode in advance, also interfered cell can be transferred to by former community by X2 interface by semi-static mode, former community can certainly be transferred to by interfered cell, not repeat herein.
Step 304, the interfered with terminal schedule information that reception interfered cell, former community sends.
In the present embodiment, described interfered cell is carried out scheduling according to the scheduling resource constraints of preserving in described step 303 to interfered with terminal and is arranged, and the schedule information after arranging is sent to former community.
Step 305, the schedule information of the interfered with terminal schedule information received in refer step 304 and the user terminal of former community, carry out AF panel operation to the user terminal of former community, concrete steps can not repeat described in step 204 shown in Figure 2 herein.
The inter-cell interference restraint method that the embodiment of the present invention provides can also to down channel, and as down control channel or downstream data channel carry out AF panel, its concrete implementation method is substantially identical with embodiment 2 with above-described embodiment 1, does not repeat herein.
In order to save networked communication resource, when having known the channel information of ascending control channel or uplink data channels in advance, the reciprocity of channel can be utilized to obtain the channel information of down control channel or downstream data channel.
In above two embodiments, described step 202 and 302 is when determining the interfered with terminal of the user terminal of former community and interfered cell, can also comprise and judge whether to carry out disturbing the step eliminated to the described user terminal meeting interfered with terminal constraints, described step 204 and 305 can carry out corresponding AF panel operation according to judged result, and its concrete steps can comprise:
First judgement thresholding is set, when the signal strength difference of the former signal strength signal intensity of community user terminal and the interfered with terminal of interfered cell is less than described judgement thresholding, in step 204 and 305, interference cancellation operation is performed to the user terminal of former community; Otherwise in step 204 and 305, other operations are performed to the user terminal of former community, as directly regarded interference as, not doing interference elimination or adopt FFR etc.
Wherein, described judgement thresholding can be consulted to obtain by former community and interfered cell.
The inter-cell interference restraint method that the embodiment of the present invention provides, owing to pre-setting end conswtraint condition and scheduling resource constraints, so the schedule information of transmission is less when carrying out presence of intercell interference and suppressing, relative to prior art, the resource shared by transmitting scheduling information is less.
With said method accordingly, as shown in Figure 4, the embodiment of the present invention also provides a kind of base station, comprising:
End conswtraint condition storage unit 401, for storage terminal constraints;
Interfered cell determining unit 402, for determining interfered cell;
Schedule information acquiring unit 403, for obtaining the schedule information of the interfered with terminal meeting end conswtraint condition in described interfered cell;
AF panel unit 404, for the schedule information according to described interfered with terminal, AF panel operation is carried out to the user terminal meeting described end conswtraint condition in former community, described in the inter-cell interference restraint method that its concrete step can provide see the embodiment of the present invention.
Further, as shown in Figure 5, described schedule information acquiring unit 403 can comprise:
Receiving element 4031, for receiving the schedule information meeting the interfered with terminal of end conswtraint condition that interfered cell sends.
Further, as shown in Figure 5, described base station can also comprise:
Scheduling resource constraints memory cell 405, for memory scheduling resource constraint;
Then described schedule information acquiring unit 403 can also comprise:
Acquiring unit 4032, for according to the scheduling resource constraints obtained from scheduling resource constraints memory cell 405, adopts the schedule information meeting the interfered with terminal of end conswtraint condition in interfered cell described in blind Detecting technical limit spacing.
Further, as shown in Figure 5, described AF panel unit 404 can comprise:
Interference coordination unit 4041, for the schedule information according to described interfered with terminal, the channel dispatch described interfered with terminal and user terminal used is on different Resource Block, Huo Youyuan community and interfered cell are described user terminal Resources allocation jointly, or by described interfered with terminal with the channel dispatch that user terminal uses on identical Resource Block, and the power used is different; And/or
Interference cancellation unit 4042, for the schedule information according to described interfered with terminal, obtains the interference signal of interfered with terminal, carries out interference eliminate described user terminal.
Further, as shown in Figure 5, described base station can also comprise:
Judging unit 406 is eliminated in interference, for judging whether that carrying out interference to the described user terminal meeting interfered with terminal constraints eliminates;
Then described interference cancellation unit 4042, for when judged result be to the described user terminal meeting interfered with terminal constraints carry out interference eliminate time, according to the schedule information of described interfered with terminal, obtain the interference signal of interfered with terminal, interference is carried out to described user terminal and eliminates.
Further, as shown in Figure 6, described interference cancellation unit 4042 can comprise:
User terminal acquiring unit 601, for the channel information according to described interfered with terminal, obtains and described interfered with terminal channel independently user terminal;
AF panel, to component units 602, for the schedule information according to described interfered with terminal, will use described interfered with terminal and user terminal composition AF panel pair that Resource Block is identical;
Interference signal eliminates unit 603, for the schedule information according to described interfered with terminal, obtains the interference signal of described interfered with terminal, described interference signal is eliminated from the signal of described user terminal.
The base station that the embodiment of the present invention provides, owing to pre-setting end conswtraint condition and scheduling resource constraints, so when carrying out presence of intercell interference and suppressing, the schedule information of transmission is less, and relative to prior art, the resource shared by transmitting scheduling information is less.
As shown in Figure 7, the embodiment of the present invention also provides a kind of presence of intercell interference to suppress system, comprising:
Base station, more than one interfered cell 701, for obtaining the schedule information of the interfered with terminal meeting end conswtraint condition, and sends to described former cell base station by this schedule information;
Former cell base station 702, for determining interfered cell, obtain the schedule information of the interfered with terminal meeting end conswtraint condition in described interfered cell, the schedule information according to described interfered with terminal carries out AF panel operation to the user terminal meeting described end conswtraint condition in former community.
Further, when pre-setting scheduling resource constraints, described former cell base station 702, specifically may be used for according to described scheduling resource constraints, adopts the schedule information meeting the interfered with terminal of end conswtraint condition in interfered cell described in blind Detecting technical limit spacing.
When pre-setting scheduling resource constraints, base station, described more than one interfered cell 701, can also be used for obtaining according to the scheduling resource constraints pre-set the schedule information meeting the interfered with terminal of end conswtraint condition, and this schedule information is sent to described former cell base station.
The presence of intercell interference that the embodiment of the present invention provides suppresses system, owing to pre-setting end conswtraint condition and scheduling resource constraints, so the schedule information of transmission is less when carrying out presence of intercell interference and suppressing, relative to prior art, the resource shared by transmitting scheduling information is less.
In order to solve prior art when carrying out presence of intercell interference and suppressing, need between cell base station to transmit a large amount of schedule informations, cause the problem that the networked communication resource that takies is too much, another embodiment of the present invention also provides a kind of inter-cell interference restraint method, device and system.
Community described in the embodiment of the present invention can be in esse community, the virtual subdistrict that also can be made up of more than one access point (AP), below in an example, is all that in esse community is described for described community.
As shown in Figure 8, the disturbance restraining method that the embodiment of the present invention provides comprises:
Step 801, user terminal receives the identification information of interfered with terminal.
Step 802, user terminal obtains the schedule information of interfered with terminal according to described identification information, and wherein, described schedule information can send to described user terminal by interfered cell by Physical Downlink Control Channel (PDCCH).
Step 803, user terminal obtains the interference signal of interfered with terminal according to described schedule information.
Step 804, described interference signal is eliminated by user terminal from the signal that user terminal receives.
In the present embodiment, the identification information of described interfered with terminal is UE ID, this UE ID can send to described user terminal by the base station of interfered cell, also can be sent to the former cell base station at user terminal place by the base station of interfered cell, then send to described user terminal by described former cell base station.Described UE ID can send to described user terminal by broadcast or PDCCH.
In the present embodiment, described user terminal specifically can by forming with described interfered with terminal the interference signal that the right mode of AF panel obtains described interfered with terminal, and concrete acquisition methods does not repeat herein.
When the inter-cell interference restraint method that the embodiment of the present invention provides is applied in up channel, during as being applied in ascending control channel or uplink data channels, can also comprise:
The schedule information sending described interfered with terminal, to former cell base station, makes described former cell base station obtain interference signal according to described schedule information, and this interference signal is eliminated from the upward signal of user terminal.
The inter-cell interference restraint method that the embodiment of the present invention provides, user terminal in former community can obtain the schedule information of interfered with terminal according to the identification information of the interfered with terminal received, and carry out interference cancellation operation according to this schedule information acquisition interference signal, compared with prior art, Internet resources shared by the identification information of transmission disturbance terminal are less, reach the object of saving Internet resources; Described user terminal can receive the identification information of interfered with terminal, the schedule information of interfered with terminal is obtained according to this identification information, interference signal is obtained according to this schedule information, and described interference signal is eliminated from the signal received, solve prior art and cannot obtain interference signal due to user terminal, cause cannot carrying out on the subscriber terminal disturbing the problem eliminated.
With described method accordingly, as shown in Figure 9, the embodiment of the present invention also provides a kind of user terminal, comprising:
Identification information receiving element 901, for receiving the identification information of interfered with terminal;
Schedule information acquiring unit 902, for obtaining the schedule information of interfered with terminal according to described identification information;
Interference signal acquiring unit 903, for obtaining the interference signal of interfered with terminal according to described schedule information;
Interference cancellation unit 904, for eliminating described interference signal from the signal that user terminal receives.
Further, as shown in Figure 9, described user terminal can also comprise:
Schedule information transmitting element 905, for sending the schedule information of described interfered with terminal to former cell base station, making described former cell base station obtain interference signal according to described schedule information, and this interference signal being eliminated from the signal of user terminal.
The user terminal that the embodiment of the present invention provides can obtain the schedule information of interfered with terminal according to the identification information of the interfered with terminal received, and carry out interference cancellation operation according to this schedule information acquisition interference signal, compared with prior art, Internet resources shared by the identification information of transmission disturbance terminal are less, reach the object of saving Internet resources; Described user terminal can receive the identification information of interfered with terminal, the schedule information of interfered with terminal is obtained according to this identification information, interference signal is obtained according to this schedule information, and described interference signal is eliminated from the signal received, solve prior art and cannot obtain interference signal due to user terminal, cause cannot carrying out on the subscriber terminal disturbing the problem eliminated.
As shown in Figure 10, the embodiment of the present invention also provides a kind of presence of intercell interference to suppress system, comprising:
First base station 1001, for sending the identification information of interfered with terminal to user terminal 1002;
Second base station 1003, for receiving the schedule information of the described interfered with terminal that described user terminal 1002 obtains according to the identification information of interfered with terminal, obtain interference signal according to this schedule information, described interference signal is eliminated from the signal of described user terminal 1002.
The presence of intercell interference that the embodiment of the present invention provides suppresses system, user terminal in former community can receive the identification information of interfered with terminal, the schedule information of interfered with terminal is obtained according to this identification information, and this schedule information is sent to the second base station, obtain interference signal by affiliated second base station according to this schedule information and carry out interference cancellation operation.Compared with prior art, the first base station only needs the identification information to user terminal transmission disturbance terminal, and the Internet resources transmitted shared by this identification information are less, can reach the object of saving Internet resources.One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a computer-readable recording medium, as ROM/RAM, magnetic disc or CD etc.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (13)
1. an inter-cell interference restraint method, is characterized in that, comprising:
Determine interfered cell;
Obtain the schedule information of the interfered with terminal meeting end conswtraint condition in described interfered cell;
Schedule information according to described interfered with terminal carries out AF panel operation to the user terminal meeting described end conswtraint condition in former community;
The schedule information meeting the interfered with terminal of end conswtraint condition in the described interfered cell of described acquisition comprises:
Receive the schedule information meeting the interfered with terminal of end conswtraint condition that interfered cell sends; And/or
According to the scheduling resource constraints pre-set, adopt the schedule information meeting the interfered with terminal of end conswtraint condition in interfered cell described in blind Detecting technical limit spacing;
The described schedule information according to described interfered with terminal is carried out AF panel operation to the user terminal meeting described end conswtraint condition in former community and is comprised:
According to the schedule information of described interfered with terminal, the channel dispatch used by the user terminal meeting described end conswtraint condition in described interfered with terminal and former community is on different Resource Block; Or
According to the schedule information of described interfered with terminal, be the described user terminal Resources allocation meeting described end conswtraint condition in former community jointly by former community and interfered cell; Or
According to the schedule information of described interfered with terminal, the channel dispatch used by the user terminal meeting described end conswtraint condition in described interfered with terminal and former community is on identical Resource Block, and the power used is different; Or
According to the schedule information of described interfered with terminal, obtain the interference signal of interfered with terminal, interference is carried out to the user terminal meeting described end conswtraint condition in described former community and eliminates; Or
Described schedule information is sent in former community the user terminal meeting described end conswtraint condition, according to described schedule information, the interference signal of described interfered with terminal is eliminated from the signal received to make the user terminal meeting described end conswtraint condition in former community.
2. inter-cell interference restraint method according to claim 1, is characterized in that, describedly determines that interfered cell comprises:
According to the cell ID information of the interfered cell prestored, determine interfered cell; And/or
Receive the cell ID information that interfered cell sends, determine interfered cell according to this cell ID information.
3. inter-cell interference restraint method according to claim 1, is characterized in that, described schedule information comprises at least one information in following information:
Resource block information, channel information, sequence information, modulation coding mode information, antenna mode information, MIMO mode information, pilot frequency information, frequency hopping pattern information or Termination ID.
4. inter-cell interference restraint method according to claim 1, is characterized in that, also comprises:
Judge whether that carrying out interference to the user terminal meeting interfered with terminal constraints eliminates;
When judged result is when carrying out interference elimination to the described user terminal meeting interfered with terminal constraints, according to the schedule information of described interfered with terminal, obtain the interference signal of interfered with terminal, interference is carried out to the user terminal meeting described end conswtraint condition in described former community and eliminates.
5. the inter-cell interference restraint method according to claim 1 or 4, it is characterized in that, the described schedule information according to described interfered with terminal, obtains the interference signal of interfered with terminal, carries out interference elimination comprise the user terminal meeting described end conswtraint condition in described former community:
According to the channel information of described interfered with terminal, obtain and described interfered with terminal channel independently user terminal;
According to the schedule information of described interfered with terminal, by use the identical described interfered with terminal of Resource Block and with described interfered with terminal channel independently user terminal form AF panel pair;
According to the schedule information of described interfered with terminal, obtain the interference signal of described interfered with terminal, described interference signal is eliminated from the signal of described and described interfered with terminal channel independently user terminal.
6. inter-cell interference restraint method according to claim 5, it is characterized in that, the described schedule information according to described interfered with terminal, obtains the interference signal of interfered with terminal, carries out interference elimination also comprise the user terminal meeting described end conswtraint condition in described former community:
According to the schedule information of described interfered with terminal, by the scheduling of user terminals meeting described end conswtraint condition in described interfered with terminal and described former community to identical or have on the Resource Block of inclusion relation.
7. inter-cell interference restraint method according to claim 5, is characterized in that, described channel information is the channel information of statistics; This channel information is directly obtained the channel estimating of interfered cell by former community; Or by the information acquisition that interfered cell sends.
8. a base station, is characterized in that, comprising:
End conswtraint condition storage unit, for storage terminal constraints;
Interfered cell determining unit, for determining interfered cell;
Schedule information acquiring unit, for obtaining the schedule information of the interfered with terminal meeting end conswtraint condition in described interfered cell;
AF panel unit, carries out AF panel operation for the schedule information according to described interfered with terminal to the user terminal meeting described end conswtraint condition in former community;
Scheduling resource constraints memory cell, for memory scheduling resource constraint;
Described schedule information acquiring unit comprises:
Acquiring unit, for according to the scheduling resource constraints obtained from scheduling resource constraints memory cell, adopts the schedule information meeting the interfered with terminal of end conswtraint condition in interfered cell described in blind Detecting technical limit spacing;
Described AF panel unit comprises:
Interference coordination unit, for the schedule information according to described interfered with terminal, the channel dispatch described interfered with terminal and user terminal used is on different Resource Block, Huo Youyuan community and interfered cell are described user terminal Resources allocation jointly, or by described interfered with terminal with the channel dispatch that user terminal uses on identical Resource Block, and the power used is different; And/or
Interference cancellation unit, for the schedule information according to described interfered with terminal, obtains the interference signal of interfered with terminal, carries out interference eliminate described user terminal;
The interference signal of described interfered with terminal, also for described schedule information being sent in former community the user terminal meeting described end conswtraint condition, is eliminated according to described schedule information to make the user terminal meeting described end conswtraint condition in former community by described base station from the signal received.
9. base station according to claim 8, is characterized in that, described schedule information acquiring unit comprises:
Receiving element, for receiving the schedule information meeting the interfered with terminal of end conswtraint condition that interfered cell sends.
10. base station according to claim 8, is characterized in that, also comprises:
Judging unit is eliminated in interference, for judging whether that carrying out interference to the user terminal meeting interfered with terminal constraints eliminates;
Then described interference cancellation unit, for when judged result be to the described user terminal meeting interfered with terminal constraints carry out interference eliminate time, according to the schedule information of described interfered with terminal, obtain the interference signal of interfered with terminal, interference is carried out to described user terminal and eliminates.
11. 1 kinds of presence of intercell interference suppress system, it is characterized in that, comprising:
Base station, more than one interfered cell, for obtaining the schedule information of the interfered with terminal meeting end conswtraint condition, and sends to former cell base station by this schedule information;
Former cell base station, for determining interfered cell, obtain the schedule information of the interfered with terminal meeting end conswtraint condition in described interfered cell, the schedule information according to described interfered with terminal carries out AF panel operation to the user terminal meeting described end conswtraint condition in former community;
The schedule information meeting the interfered with terminal of end conswtraint condition that described former cell base station sends specifically for receiving interfered cell, and/or, according to the scheduling resource constraints pre-set, adopt the schedule information meeting the interfered with terminal of end conswtraint condition in interfered cell described in blind Detecting technical limit spacing;
Described former cell base station is specifically for the schedule information according to described interfered with terminal, and the channel dispatch used by the user terminal meeting described end conswtraint condition in described interfered with terminal and former community is on different Resource Block; Or according to the schedule information of described interfered with terminal, by former community and interfered cell jointly for meeting the described user terminal Resources allocation of described end conswtraint condition in former community; Or according to the schedule information of described interfered with terminal, the channel dispatch used by the user terminal meeting described end conswtraint condition in described interfered with terminal and former community is on identical Resource Block, and the power used is different; Or according to the schedule information of described interfered with terminal, obtain the interference signal of interfered with terminal, interference elimination is carried out to the user terminal meeting described end conswtraint condition in described former community; Or described schedule information is sent in former community the user terminal meeting described end conswtraint condition, the interference signal of described interfered with terminal is eliminated from the signal received according to described schedule information to make the user terminal meeting described end conswtraint condition in former community.
12. presence of intercell interference according to claim 11 suppress system, it is characterized in that, when pre-setting scheduling resource constraints, described former cell base station, specifically for according to described scheduling resource constraints, adopt the schedule information meeting the interfered with terminal of end conswtraint condition in interfered cell described in blind Detecting technical limit spacing.
13. presence of intercell interference according to claim 11 suppress system, it is characterized in that, when pre-setting scheduling resource constraints, base station, described more than one interfered cell, also for obtaining the schedule information meeting the interfered with terminal of end conswtraint condition according to the scheduling resource constraints pre-set, and this schedule information is sent to described former cell base station.
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| CN102238649B (en) * | 2010-04-30 | 2015-01-14 | 电信科学技术研究院 | Method and device for avoiding uplink channel interferences in heterogeneous system |
| ES2639643T3 (en) | 2010-06-23 | 2017-10-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Interference management of reference signals in deployments of heterogeneous networks |
| CN102958063B (en) * | 2011-08-18 | 2016-01-20 | 中国移动通信集团公司 | Reduce the method, system and device of presence of intercell interference |
| CN103002452B (en) * | 2011-09-14 | 2016-08-10 | 华为技术有限公司 | For reducing the method for inter-cell signal interference, base station and wireless communication system |
| EP2723133A1 (en) * | 2012-10-18 | 2014-04-23 | NTT DoCoMo, Inc. | Method for controlling operation within a cell of a wireless cellular network, base station and wireless cellular network |
| WO2014110829A1 (en) * | 2013-01-21 | 2014-07-24 | 华为技术有限公司 | Interference suppression method, data transmission method, device, user equipment, and base station |
| CN104244387B (en) * | 2013-06-20 | 2018-11-23 | 南京中兴新软件有限责任公司 | The adjacent area WCDMA interference control method and WCDMA system |
| JP6262950B2 (en) * | 2013-07-19 | 2018-01-17 | 株式会社Ｎｔｔドコモ | Base station, user equipment and interference reduction method |
| CN104519584B (en) * | 2013-09-27 | 2018-01-26 | 上海诺基亚贝尔股份有限公司 | A kind of method and apparatus for being used to handle interference data |
| CN104753838B (en) * | 2013-12-26 | 2020-03-17 | 中兴通讯股份有限公司 | Interference processing method and device, network control unit and terminal |
| WO2016000100A1 (en) * | 2014-06-11 | 2016-01-07 | 华为技术有限公司 | Base station and communication method for reducing channel interference |
| CN105827275B (en) * | 2015-01-05 | 2021-06-29 | 上海诺基亚贝尔股份有限公司 | Frequency hopping method and device for inter-cell interference elimination |
| CN107251445B (en) * | 2015-03-04 | 2019-12-17 | 华为技术有限公司 | transmission device, system and method based on frequency hopping |
| CN107548160A (en) * | 2016-06-23 | 2018-01-05 | 中兴通讯股份有限公司 | Interference eliminates dispatching method, apparatus and system |
| CN107769883B (en) * | 2016-08-19 | 2021-10-29 | 北京三星通信技术研究有限公司 | Method and equipment for suppressing inter-cell interference |
| EP3854011A1 (en) * | 2018-09-21 | 2021-07-28 | Telefonaktiebolaget LM Ericsson (publ) | Intelligent grouping of network nodes for remote interference management |
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