CN101018220A - Implementation method and device for avoiding the interference between the cells - Google Patents
Implementation method and device for avoiding the interference between the cells Download PDFInfo
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Abstract
The related method preventing subzone interference comprises: allocating corresponding frequency resource for subzone edge users applying interference coordination and interference elimination respectively, exactly, the frequency resource can be allocated in advance, or allocated when system business loading changes and satisfies a certain condition; then, adjusting the frequency resource for eliminating and coordinating interference. This invention makes full of two ways for avoiding interference, adds system flexibility, and supports wide business request.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of technology of eliminating presence of intercell interference.
Background technology
At present, in wireless communication system, more and more receive the concern of industry based on OFDM (OFDM) technology of multicarrier.The basic thought of OFDM technology is the narrowband subchannels that the running time-frequency resource of wireless communication system is divided into some quadratures in frequency domain, and high-speed data-flow is by serial to parallel conversion parallel transmission on each subchannel.Because the narrow-band characteristic of subchannel can overcome multi-path influence, keep the orthogonality between the subchannel, thereby guaranteed that the interference between the internal user of sub-district is very little.
The advantage of OFDM technology is to guarantee that between the signal of sub-district internal user be quadrature, avoids the interference between the internal user of sub-district.But, still exist between the sub-district of OFDM technology and disturb, promptly for the user who is in cell boarder, it still may be subjected to the interference of the signal of neighbor cell transmission.
In order to solve described presence of intercell interference, two kinds of solutions are just proposed, be the implementation of interference coordination (Interference Co-ordination) and the implementation of interference eliminated (Interference Cancellation), occur disturbing to avoid the minizone.
Below will be respectively the implementation of two schemes be described.
(1) implementation of interference coordination
In this scheme, be that frequency resource is divided, and give the user who is in cell boarder of different districts different frequency resource allocation, thus can be so that the interference that is between the user of cell boarder be less.Wherein, be called the basic frequency of this sub-district for the frequency that is used for boundary user of each sub-district for priority allocation, the frequency of other of this sub-district is called secondary frequencies.
In described interference coordination schemes, the boundary user of neighbor cell need use different basic frequencies to avoid presence of intercell interference, realizes frequency re-use factor greater than 1, and secondary frequencies can be distributed to Cell Center User and use, and frequency re-use factor is 1.But, in the method, for a certain sub-district, the spendable number of subcarriers of cell boundary users is limited, has therefore limited to this cell boundary users peak rate and throughput, for some specific situation, because the restriction of frequency resource causes the demand of the communication of can't satisfying, for example, when there is peak value rate business demand in a lot of or cell boarder when neighbor cell boundary user quantity, the finite frequency resource of then distributing to cell boundary users can't satisfy corresponding demand.
(2) implementation of interference eliminated
This method is: when the user who takies same frequency resources when neighbor cell interferes with each other, each user at first carries out the demodulation sign indicating number with interference signal, and the interference signal of recover separated from received signal remove, with the accuracy of raising to the demodulation sign indicating number of desired signal.
In carrying out the Interference Detection separating process, need to receive the signal configures situation that the user knows the interference user that comes from neighbor cell, comprise modulation coding mode, FEC (forward error correction) mode and code rate etc., these information all need extra a large amount of signaling relative users, and this will inevitably increase the load and the complexity of system.
In view of advantage and the shortcomings that the above two kinds implementations of avoiding presence of intercell interference exist, the implementation method of avoiding presence of intercell interference that the implementation with interference coordination combines with the implementation of interference eliminated has also been proposed at present.Wherein, at first all users are divided into Cell Center User and cell boundary users, as shown in Figure 1: the part of the grey hexagonal area among the figure can be used all frequency resources, and frequency re-use factor is 1; On behalf of cell boundary users, the part with grid, point-like and blank sign among the figure adopt the method for interference coordination frequency planning, and frequency re-use factor is greater than 1.
In addition, on behalf of cell boundary users, the part that the gray area of the circle among Fig. 1 indicates use the method for Interference Detection and separation, and taking all subcarriers, to make frequency re-use factor be one.These cell boundary users are to adopt the frequency resource block (Chunk) of the identical size of same position to carry out interference eliminated, and Chunk is defined as continuous in time several symbols continuous some subcarriers on frequency.
The advantage of the implementation method of above-mentioned two scheme combinations is by frequency division minimum to be avoided or is reduced in the interference of neighbor cell, effectively raises the SIR (signal-to-jamming ratio) of cell boundary users, and has lower implementation complexity.
But, in technique scheme, do not design detailed resource allocation methods according to the concrete system load situation in each sub-district, if the neighbor cell of different loads situation adopts identical resource distribution mode and ratio, then reasonably do not arranged for the utilization of limited physical resource, the throughput of system also is restricted.
In addition, do not provide concrete Physical Resource Block and encoding block in the technique scheme yet and carry out relation between the Resource Block that Interference Detection eliminates, if supposing the mapping encoding block identical with the Chunk size encodes, can carry out so just that " dual user detection " or " Multiuser Detection " are recovered interference signal from the Chunk of the identical size of same position and with its separation, if the size of encoding block is mapped to physical resource when not being Chunk size, when for example being 2 times of Chunk size, if also be that unit carries out interference eliminated with Chunk, then when carrying out the demodulation sign indicating number, disturbed Chunk only comprises the interference piece of a part of disturbing piece, make and to carry out correct decoding and detection to interference signal, also just can't recover and remove the interference signal of this part.
In a word, still there are some problems in the implementation of above-mentioned prior art, makes effectively to avoid the interference that may occur in the wireless communication system.
Summary of the invention
The purpose of this invention is to provide a kind of minizone of avoiding and implementation method and the device that disturbs occur, make and effectively to realize having complementary advantages between the implementation of the implementation of interference coordination and interference eliminated, thereby effectively avoid the interference that may occur in the wireless communication system.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of minizone of avoiding and the implementation method of disturbing occurs, comprising:
Be respectively the cell boundary users of using the interference coordination cell boundary users and using interference eliminated and distribute the correspondent frequency resource as being used for the frequency resource that interference eliminated and interference coordination take, and dynamically adjust and be used for the frequency resource that interference eliminated and interference coordination take.
Described method specifically comprises:
Part in all available frequency resources distributed to the cell boundary users of using interference eliminated as being used for the frequency resource that interference eliminated takies, and this frequency resource neighbor cell user is shared;
Remaining available frequency resources is divided into basic frequency and secondary frequencies, wherein, the frequency resource that the basic frequency priority allocation takies as interference coordination to the cell boundary users that is used for interference coordination, secondary frequencies is distributed to Cell Center User;
Dynamically adjust the described frequency resource that interference eliminated and interference coordination take that is used for.
Described method specifically comprises:
All available frequency resources are divided into basic frequency and secondary frequencies, wherein, the basic frequency priority allocation takies for cell boundary users as interference coordination frequency resource, secondary frequencies is distributed to Cell Center User;
When cell boundary users occurring and reach predetermined quantitative value or cell boarder and exist the peak rate demand to reach predetermined value, then mark off the frequency resource that a part takies as interference eliminated, and use this frequency resource jointly with neighbor cell from described basic frequency;
Dynamically adjust the described frequency resource that Interference Detection is eliminated and interference coordination takies that is used for.
Described method comprises:
The interference eliminated Resource Block that comprises one group of continuous subcarrier that is used for interference eliminated comprises at least one complete encoding block, and on same position, is made of the continuous physical resource piece of integral multiple.
Described method comprises:
When a certain user's raw information transmission block during greater than predetermined value, then that the user is original transmission block is divided into a plurality of encoding blocks, makes the size of each encoding block corresponding with the interference eliminated Resource Block.
Described method comprises:
At the adjustment that is used for the frequency resource that interference coordination takies is to distinguish the resource that the different districts boundary user takies by different frequency patterns to realize,
Described method comprises:
To eliminate the adjustment of the frequency resource take be to distinguish realization by different frequency patterns and the frequency resource that is used for interference coordination at being used for Interference Detection.
Described method comprises:
Be used for Interference Detection and eliminate the different modulating-coding pattern of Resource Block employing that takies, perhaps adopt identical modulation coding mode.
Described method also comprises: when the Resource Block that is used for interference eliminated when neighbor cell adopts different modulation coding modes, need notify disturbed user with the configuration information of interference user.
Among the present invention, notify disturbed user's process to comprise the configuration information of interference user:
Interfered cell base station notice interfered cell base station interference user's configuration information is notified disturbed user by the interfered cell base station with this information again;
Perhaps,
Interfered cell base station notice interfered cell base station interference user's identity information is notified disturbed user according to described identity information with the configuration information of the interference user of correspondence by the interfered cell base station again.
Describedly be used for the frequency resource that interference coordination takies, be set to and adjust between neighbor cell according to the different loading demand situation of neighbor cell.
Described dynamic adjustment specifically comprises:
In the sub-district, the frequency resource that interference eliminated and interference coordination take that is used for of having distributed in the sub-district is adjusted according to the business demand situation of the number of users of cell boarder or cell boundary users.
The present invention also provides a kind of minizone of avoiding the implement device that disturbs to occur, and comprising:
The frequency resource allocation module: the cell boundary users that is used to be respectively interference coordination and interference eliminated determines that the correspondent frequency resource is as being used for the frequency resource that interference eliminated and interference coordination take;
Frequency regulation block: be used for dynamically adjusting the described frequency resource that interference eliminated and interference coordination take that is used for.
Described frequency resource allocation module specifically comprises:
Interference eliminated frequency resource allocation module: be used for the part of the frequency resource of sub-district is distributed to the cell boundary users that is used to interference eliminated as being used for the frequency resource that interference eliminated takies, and this frequency resource and neighbor cell user are shared;
Interference coordination frequency resource allocation module: be used for another part frequency resource of sub-district is divided into basic frequency and secondary frequencies, wherein, the basic frequency priority allocation is used for the frequency resource that the interference coordination cell boundary users takies as interference coordination, and secondary frequencies is distributed to Cell Center User.
Described frequency resource allocation module specifically comprises:
Interference coordination frequency resource allocation module: the frequency resource of sub-district is divided into basic frequency and secondary frequencies, wherein, and the basic frequency priority allocation takies for cell boundary users as interference coordination frequency resource, secondary frequencies is distributed to Cell Center User;
Judging treatmenting module: be used for when judging that neighbor cell boundary user quantity occurs reaches predetermined value or cell boarder and exist the peak rate demand to reach the predetermined value situation, triggering interference eliminated frequency resource allocation module;
Interference eliminated frequency resource allocation module: the described basic frequency of interference coordination frequency resource allocation Module Division marks off the frequency resource that a part takies as interference eliminated, and uses this frequency resource jointly with neighbor cell.
Described device also comprises:
Message processing module: be used for when a certain user's raw information transmission block during greater than predetermined value, then that the user is original transmission block is divided into a plurality of CB, makes the size of each CB corresponding with ICRB.
Among the present invention, when the Resource Block that is used for interference eliminated when neighbor cell adopted different modulation coding modes, described device also comprised:
Interfere information notification module: be arranged in the interfered cell base station, be used for configuration information notice interfered cell base station with interference user;
First information sending module: be arranged in the interfered cell base station, be used for notifying disturbed user with the configuration information of described interference user.
Among the present invention, when the Resource Block that is used for interference eliminated when neighbor cell adopted different modulation coding modes, described device also comprised:
Identity information notification module: be arranged in the interfered cell base station, be used for identity information notice interfered cell base station with interference user;
Second information sending module: be arranged in the interfered cell base station, be used for notifying disturbed user with the configuration information of the interference user of correspondence according to the identity information of described interference user.
As seen from the above technical solution provided by the invention, the invention provides interference coordination and disturb and to avoid the implementation more flexibly that combines with interference eliminated, and provided concrete Physical Resource Block and encoding block and carried out relation between the Resource Block that Interference Detection eliminates.Therefore, realization of the present invention makes and can utilize two kinds of implementation methods of avoiding presence of intercell interference simultaneously in wireless communication system: a kind of be interference coordination to avoid presence of intercell interference, another kind is to carry out interference eliminated; Thereby make realization mutual supplement with each other's advantages separately between two kinds of methods, to reduce limitation separately.Simultaneously, the frequency resource that the present invention also takies separately by dynamic adjustment interference eliminated and interference coordination, thus increased the flexibility of system, support various business demand.
In addition, thereby the present invention is not subjected to the restriction of user data transmission block size to support the multiple business demand, and bigger data transmission block business can be carried out interference eliminated, and the professional employing of less data transmission block interference coordination disturbs to be avoided.
Description of drawings
Fig. 1 is the system schematic that interference eliminated combines with interference coordination in the prior art;
Fig. 2 is the specific implementation schematic diagram of the system that combines with interference coordination of interference eliminated provided by the invention;
Fig. 3 is the schematic diagram of the frequency resource dynamically adjusting interference eliminated and interference coordination among the present invention and take;
Fig. 4 is the resource distribution mode schematic diagram based on interference coordination;
Fig. 5 is the frequency resource adjustment process schematic diagram that is used for interference eliminated;
Fig. 6 comprises the schematic diagram of complete encoding block for interference cancellation block;
The schematic diagram of the complete encoding block after Fig. 7 is cut apart for interference cancellation block comprises;
Fig. 8 is a schematic representation of apparatus of the present invention.
Embodiment
The present invention realizes on the basis based on interference coordination and two kinds of implementations that avoid interference of interference eliminated.Comprise that in implementation procedure the frequency resource that has realized interference coordination and interference eliminated take dynamically adjusts, thereby effectively support different system environment and various business demand.
In the scheme that interference coordination provided by the invention and interference eliminated combine, can adopt different frequency resource allocation modes to realize the dynamic adjustment of frequency resource that interference coordination and interference eliminated are taken; Both can distribute the correspondent frequency resource in advance, also can when business load changes and meet predetermined condition, finish the distribution of the frequency resource that interference eliminated and interference coordination take.
For ease of the understanding of the present invention, will be that example describes specific implementation of the present invention to adopt following two kinds of concrete dynamic frequency resource allocation modes below.Certainly, realization of the present invention is not limited in following two kinds of concrete resource distribution modes.
(1) first kind of resource distribution mode
In this mode, be from all available frequency resources, to mark off a part specially to distribute to the cell boundary users that is used for interference eliminated, this part frequency resource can be shared by the neighbor cell user; Afterwards, remaining cell frequency resources is divided into basic frequency and secondary frequencies, the basic frequency priority allocation is used for the interference coordination cell boundary users, and secondary frequencies is distributed to Cell Center User; After resource allocation is finished, can also dynamically adjust according to the different system loading condition and be used for the frequency resource that interference eliminated and interference coordination take.
With reference to shown in Figure 2, at first, specific assigned part frequency resource is used for the Interference Detection of cell boundary users to be eliminated, and the black circles among Fig. 2 partly is and is used for the frequency resource that the cell boundary users Interference Detection is eliminated; Then, carry out the interference coordination resource allocation again, be that on behalf of cell boundary users, other adopt the interference coordination frequency planning to avoid interference with grid, point-like and the blank part that indicates among Fig. 2, and do not adopt the Interference Detection technology for eliminating, the part that middle grey hexagon indicates is to distribute to Cell Center User can use all frequency resources, and frequency re-use factor is one.
At this moment, this part can be distributed to cell boundary users and be used for the frequency resource of interference eliminated with carrying out semi-static or dynamic adjustment, as shown in Figure 3, the different districts base station can be used for interference coordination or distribute to Cell Center User to cell boundary users according to the frequency resource allocation that different separately system load demands will be used for interference eliminated, for example:
When the system loading of cell boarder hour, as only existing among Fig. 3 shown in the interference coordination part, in this case, can be used to carry out the frequency resource that Interference Detection eliminates and redistribute distributing to, and the interference between cell boarder only just can have been avoided by fairly simple interference coordination technique to Cell Center User.And, because when Cell Center User was given in a part of resource allocation, because far away apart from neighbor cell, the signal power decay is bigger, and was very little to the interference that neighbor cell causes, therefore no longer needs to carry out Interference Detection and eliminate.
Very big or when having the peak value rate requirement when a certain cell boarder load, as only existing among Fig. 3 shown in the interference eliminated part, do not exist the frequency resource that is used for interference coordination this moment, and the shared frequency resource as much as possible of all cell boundary users is to satisfy system requirements.
(2) second kinds of resource distribution modes
Another kind of resource distribution mode is based on the method for interference coordination.
In this mode, at first the frequency resource in the sub-district is divided into basic frequency and secondary frequencies: the boundary user of the basic frequency priority allocation being given each sub-district according to the frequency coordination scheme, and the boundary user of neighbor cell uses different basic frequencies, to avoid presence of intercell interference; Secondary frequencies is then distributed to Cell Center User and is used.Then, when a certain cell boarder or some neighbor cell border a large number of users occurs or have the peak value rate requirement, at this moment, the method of interference coordination can't satisfy the existing system needs, therefore, need with this sub-district or therewith the basic frequency of adjacent some neighbor cell in sub-district mark off one one shared with neighbor cell, eliminate to carry out Interference Detection.Simultaneously, also needing dynamically in communication system, adjustment is used for the frequency resource that Interference Detection is eliminated and interference coordination takies.
Illustrate, as shown in Figure 4, when the situation that the adjacent cell frequencies contention occurs, the boundary user of sub-district 1 and sub-district 2 a lot (promptly reaching the predetermined user quantitative value) or when all needing very high peak rate (being that the peak rate demand reaches predetermined value), negotiation through two sub-districts, the frequency resource that these two neighbor cells can be used for interference coordination marks off a part, and the frequency resource that this component frequency resource can be used as the boundary user of sub-district 1 and sub-district 2.Simultaneously, utilize this component frequency to adopt interference cancellation techniques with Interference Detection and separate, the frequency resource that is used for interference eliminated accordingly also can be adjusted according to different system load situations.
In addition, in the scheme that interference coordination provided by the invention and interference eliminated combine, distribute to the basic frequency resource that a certain sub-district is used for interference coordination, it is the frequency resource that priority allocation is used to cell boarder, also can carry out semi-static or dynamic adjustment with the system load situation different separately according to this sub-district with this neighbor cell border, for example, when there is a large amount of throughput demand of burst in a certain cell boarder, load as the neighbor cell border is less, then consult through this cell base station and neighbor cell base station, a part of frequency resource that the neighbor cell boundary user takies is redistributed to this community user, and this moment, the frequency re-use factor size of each sub-district can not be an integer.
The frequency resource that is used for interference coordination can be divided the frequency resource that the different districts boundary user takies by different frequency patterns, and the frequency resource that is used for interference eliminated then can be distinguished by different frequency patterns and the frequency resource that is used for interference coordination.Illustrate, as shown in Figure 5, the running time-frequency resource that on behalf of different neighbor cells, the frequency patterns of different pattern use, the running time-frequency resource that is used for interference coordination that on behalf of 3 neighbor cells 1, sub-district 2 and sub-district 3, blank, grey and bar shaped part take respectively respectively.When a lot of users (reaching predesignated subscriber's quantitative value) or peak value rate requirement (the peak rate demand reaches predetermined value) all appear in the cell boarder of sub-district 1 and sub-district 2, and the cell boarder of sub-district 3 is not when having load, the running time-frequency resource that is used for interference coordination of originally distributing to sub-district 3 can be redistributed to the boundary user of sub-district 1 and sub-district 2 shared, as interference eliminated.
Among the present invention, be the scheme that realizes that above-mentioned interference coordination technique and interference eliminated combine, also at concrete Physical Resource Block and encoding block and the relation of carrying out between the Resource Block that Interference Detection eliminates redefine, purpose is in order to guarantee in interference cancellation process, can correctly detect the interference signal of relevant position and separates.Specifically may be defined as: ICRB (Interference Cancellation Resource Block, the interference eliminated Resource Block) ICRB is by a continuous integer Physical Resource Block PRB (Physical Resource Block, Physical Resource Block) forms, this quantity can determine and guarantee the gain of enough chnnel coding that wherein PRB is described Chunk by a certain suitable canonical system load.ICRB comprises at least one complete CB (Code Block, encoding block), and the signal that comprises among this CB is the stack of interference signal and disturbed signal.When carrying out the Interference Detection elimination, must on the ICRB of same position and identical size, just can correctly detect and disturb and separate.
When the CB size that is used for the interference eliminated user is mapped to can be received into an ICRB on the physical resource time, when promptly adopting the ICRB of interference eliminated to comprise the complete CB of certain user, illustrate, as shown in Figure 6, when neighbor cell A and B will carry out Interference Detection when eliminating, the ICRB that adopts comprises complete CB of certain user, this CB is mapped to and comprises several PRB on the physical resource, in Fig. 6, each ICRB is made up of 4 continuous P RB, these 4 PRB comprise a complete encoding block of sub-district A and two boundary users of sub-district B, corresponding 6 ICRB of 6 CB of 6 users.Only need carrying out simply when like this, carrying out interference eliminated, " dual user detection " can recover out and separate interference signal.
When a certain user's raw information transmission block is big, be mapped on the physical resource greater than specific can carry out the Resource Block of interference eliminated the time such as the CB according to a certain coding gain, it is corresponding with ICRB with the size that guarantees each CB then can the transmission block that the user is original to be divided into a plurality of CB.For example, as shown in Figure 7, the user 2 of the user 3 of sub-district A and user 4 and sub-district B takies two continuous ICRB, comprise two complete CB, and the user 1 of sub-district B takies 3 discontinuous ICRB, each self-contained complete CB of each ICRB.At this moment, the number of the PRB that comprises of every ICRB still will guarantee to be fit to exemplary systems load and enough coding gains.So in this case, the user's raw information transmission block that promptly is used in the Interference Detection elimination is bigger, also can carry out similarly " dual user detection " and finish interference eliminated.
The Resource Block that is used for the Interference Detection elimination can adopt the different modulating coding mode, for example, adopts different modulating modes, FEC pattern and coding gain to adapt to different channel situation; Perhaps, also identical modulation coding mode can be adopted,, the operation that the user detects interference signal can be simplified to a great extent like this as QPSK (quadriphase PSK) and Turbo (parallel cascade interweave convolution code) coding.
In addition, the interference elimination method that uses Interference Detection to separate need receive the user and know configuration information from the neighbor cell interference user, be some configuration informations of interference signal, comprise modulation coding mode, FEC mode and code rate etc., like this, just interference signal can be recovered out and carry out separating treatment.Therefore, in communication system, need some extra methods or signaling to carry out the notice of the configuration information of interference user.The mode of the configuration information of the notice interference user that adopts among the present invention specifically can take following dual mode to realize, is respectively:
1, by interfered cell base station notice interfered cell base station interference user's configuration information, notifies disturbed user by the interfered cell base station with this information again.
2, notify interfered cell base station interference user's ID (user identity) by the interfered cell base station, notify disturbed user by the interfered cell base station with corresponding information again, disturbed user receives the configuration information of this user identity of interfered cell base station transmission.
When the Resource Block that is used for interference eliminated when neighbor cell adopts identical modulation coding mode, then, therefore, do not need extra signaling to carry out the interference signal notification of information because disturbed user has been known the configuration information of interference user in advance.
The present invention also provides a kind of minizone of avoiding the implement device that disturbs to occur, and the specific implementation of described device specifically comprises following composition module as shown in Figure 8:
(1) frequency resource allocation module
The cell boundary users that is used to be respectively interference coordination and interference eliminated determines that the correspondent frequency resource is as being used for the frequency resource that interference eliminated and interference coordination take;
This module specifically can adopt following two kinds of concrete structures to realize, is respectively:
In first kind of implementation structure, described frequency resource allocation module specifically comprises:
Interference eliminated frequency resource allocation module: be used for the part of the frequency resource of sub-district is distributed to the cell boundary users that is used to interference eliminated as being used for the frequency resource that interference eliminated takies, and this frequency resource and neighbor cell user are shared;
Interference coordination frequency resource allocation module: be used for another part frequency resource of sub-district is divided into basic frequency and secondary frequencies, wherein, the basic frequency priority allocation is used for the frequency resource that the interference coordination cell boundary users takies as interference coordination, and secondary frequencies is distributed to Cell Center User.
In second kind of implementation structure, described frequency resource allocation module specifically comprises:
Interference coordination frequency resource allocation module: the frequency resource of sub-district is divided into basic frequency and secondary frequencies, wherein, and the basic frequency priority allocation takies for cell boundary users as interference coordination frequency resource, secondary frequencies is distributed to Cell Center User;
Judging treatmenting module: be used for when judging that the neighbor cell boundary user occurs reaches predetermined value or cell boarder and exist the peak rate demand to reach the situation of predetermined value, triggering interference eliminated frequency resource allocation module;
Interference eliminated frequency resource allocation module: the described basic frequency of interference coordination frequency resource allocation Module Division marks off the frequency resource that a part takies as interference eliminated, and uses this frequency resource jointly with neighbor cell.
(2) frequency regulation block
Be used for dynamically adjusting the described frequency resource that interference eliminated and interference coordination take that is used for.
Described device also comprises:
Message processing module: be used for when the raw information transmission block of a certain cell boundary users that is used for interference eliminated during greater than predetermined value, then that the user is original transmission block is divided into a plurality of CB, makes the size of each CB corresponding with ICRB.
In addition, when the Resource Block that is used for interference eliminated when neighbor cell adopts different modulation coding modes, in described device, also need to notify disturbed user with the configuration information of interference user, for this reason, still as shown in Figure 8, need corresponding module be set in described device increase, specifically can realize by following two kinds of concrete structures:
Structure 1 is as follows for the module that increases in described device:
Interfere information notification module: be arranged in the interfered cell base station, be used for configuration information notice interfered cell base station with interference user;
First information sending module: be arranged in the interfered cell base station, be used for notifying disturbed user with the configuration information of described interference user.
Structure 2 is as follows for the module that increases in described device:
Identity information notification module: be arranged in the interfered cell base station, be used for identity information notice interfered cell base station with interference user;
Second information sending module: be arranged in the interfered cell base station, be used for notifying disturbed user with the configuration information of the interference user of correspondence according to the identity information of described interference user.
In sum, realization of the present invention makes and can utilize two kinds of implementation methods of avoiding presence of intercell interference simultaneously in wireless communication system: a kind of be interference coordination to avoid presence of intercell interference, another kind is to carry out interference eliminated; Thereby make realization mutual supplement with each other's advantages separately between two kinds of methods, to reduce limitation separately.Simultaneously, the frequency resource that the present invention also takies separately by dynamic adjustment interference eliminated and interference coordination, thus increased the flexibility of system, support various business demand.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (18)
1, the implementation method of disturbing appears in a kind of minizone of avoiding, and it is characterized in that, comprising:
Be respectively the cell boundary users of using the interference coordination cell boundary users and using interference eliminated and distribute the correspondent frequency resource as being used for the frequency resource that interference eliminated and interference coordination take, and dynamically adjust and be used for the frequency resource that interference eliminated and interference coordination take.
2, method according to claim 1 is characterized in that, described method specifically comprises:
Part in all available frequency resources distributed to the cell boundary users of using interference eliminated as being used for the frequency resource that interference eliminated takies, and this frequency resource neighbor cell user is shared;
Remaining available frequency resources is divided into basic frequency and secondary frequencies, wherein, the frequency resource that the basic frequency priority allocation takies as interference coordination to the cell boundary users that is used for interference coordination, secondary frequencies is distributed to Cell Center User;
Dynamically adjust the described frequency resource that interference eliminated and interference coordination take that is used for.
3, method according to claim 1 is characterized in that, described method specifically comprises:
All available frequency resources are divided into basic frequency and secondary frequencies, wherein, the basic frequency priority allocation takies for cell boundary users as interference coordination frequency resource, secondary frequencies is distributed to Cell Center User;
When cell boundary users occurring and reach predetermined quantitative value or cell boarder and exist the peak rate demand to reach predetermined value, then mark off the frequency resource that a part takies as interference eliminated, and use this frequency resource jointly with neighbor cell from described basic frequency;
Dynamically adjust the described frequency resource that Interference Detection is eliminated and interference coordination takies that is used for.
4, according to claim 1,2 or 3 described methods, it is characterized in that described method comprises:
The interference eliminated Resource Block that comprises one group of continuous subcarrier that is used for interference eliminated comprises at least one complete encoding block, and on same position, is made of the continuous physical resource piece of integral multiple.
5, according to claim 1,2 or 3 described methods, it is characterized in that described method comprises:
When a certain user's raw information transmission block during greater than predetermined value, then that the user is original transmission block is divided into a plurality of encoding blocks, makes the size of each encoding block corresponding with the interference eliminated Resource Block.
6, according to claim 1,2 or 3 described methods, it is characterized in that described method comprises:
At the adjustment that is used for the frequency resource that interference coordination takies is to distinguish the resource that the different districts boundary user takies by different frequency patterns to realize.
7, according to claim 1,2 or 3 described methods, it is characterized in that described method comprises:
To eliminate the adjustment of the frequency resource take be to distinguish realization by different frequency patterns and the frequency resource that is used for interference coordination at being used for Interference Detection.
8, according to claim 1,2 or 3 described methods, it is characterized in that described method comprises:
Be used for Interference Detection and eliminate the different modulating-coding pattern of Resource Block employing that takies, perhaps adopt identical modulation coding mode.
9, according to claim 1,2 or 3 described methods, it is characterized in that described method also comprises: when the Resource Block that is used for interference eliminated when neighbor cell adopts different modulation coding modes, need notify disturbed user with the configuration information of interference user.
10, method according to claim 9 is characterized in that, notifies disturbed user's process to comprise the configuration information of interference user:
Interfered cell base station notice interfered cell base station interference user's configuration information is notified disturbed user by the interfered cell base station with this information again;
Perhaps,
Interfered cell base station notice interfered cell base station interference user's identity information is notified disturbed user according to described identity information with the configuration information of the interference user of correspondence by the interfered cell base station again.
11, according to claim 1,2 or 3 described methods, it is characterized in that, describedly be used for the frequency resource that interference coordination takies, be set to and adjust between neighbor cell according to the different loading demand situation of neighbor cell.
According to claim 1,2 or 3 described methods, it is characterized in that 12, described dynamic adjustment specifically comprises:
In the sub-district, the frequency resource that interference eliminated and interference coordination take that is used for of having distributed in the sub-district is adjusted according to the business demand situation of the number of users of cell boarder or cell boundary users.
13, the implement device that disturbs appears in a kind of minizone of avoiding, and it is characterized in that, comprising:
The frequency resource allocation module: the cell boundary users that is used to be respectively interference coordination and interference eliminated determines that the correspondent frequency resource is as being used for the frequency resource that interference eliminated and interference coordination take;
Frequency regulation block: be used for dynamically adjusting the described frequency resource that interference eliminated and interference coordination take that is used for.
14, device according to claim 13 is characterized in that, described frequency resource allocation module specifically comprises:
Interference eliminated frequency resource allocation module: be used for the part of the frequency resource of sub-district is distributed to the cell boundary users that is used to interference eliminated as being used for the frequency resource that interference eliminated takies, and this frequency resource and neighbor cell user are shared;
Interference coordination frequency resource allocation module: be used for another part frequency resource of sub-district is divided into basic frequency and secondary frequencies, wherein, the basic frequency priority allocation is used for the frequency resource that the interference coordination cell boundary users takies as interference coordination, and secondary frequencies is distributed to Cell Center User.
15, device according to claim 13 is characterized in that, described frequency resource allocation module specifically comprises:
Interference coordination frequency resource allocation module: the frequency resource of sub-district is divided into basic frequency and secondary frequencies, wherein, and the basic frequency priority allocation takies for cell boundary users as interference coordination frequency resource, secondary frequencies is distributed to Cell Center User;
Judging treatmenting module: be used for when judging that the neighbor cell boundary user occurs reaches predetermined value or cell boarder and exist the peak rate demand to reach the predetermined value situation, triggering interference eliminated frequency resource allocation module;
Interference eliminated frequency resource allocation module: the described basic frequency of interference coordination frequency resource allocation Module Division marks off the frequency resource that a part takies as interference eliminated, and uses this frequency resource jointly with neighbor cell.
16, according to claim 13,14 or 15 described devices, it is characterized in that described device also comprises:
Message processing module: be used for when a certain user's raw information transmission block during greater than predetermined value, then that the user is original transmission block is divided into a plurality of CB, makes the size of each CB corresponding with ICRB.
According to claim 13,14 or 15 described devices, it is characterized in that 17, when the Resource Block that is used for interference eliminated when neighbor cell adopted different modulation coding modes, described device also comprised:
Interfere information notification module: be arranged in the interfered cell base station, be used for configuration information notice interfered cell base station with interference user;
First information sending module: be arranged in the interfered cell base station, be used for notifying disturbed user with the configuration information of described interference user.
According to claim 13,14 or 15 described devices, it is characterized in that 18, when the Resource Block that is used for interference eliminated when neighbor cell adopted different modulation coding modes, described device also comprised:
Identity information notification module: be arranged in the interfered cell base station, be used for identity information notice interfered cell base station with interference user;
Second information sending module: be arranged in the interfered cell base station, be used for notifying disturbed user with the configuration information of the interference user of correspondence according to the identity information of described interference user.
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