CN103428869A

CN103428869A - Method, base station and communication system for coordinating inter-cell interference

Info

Publication number: CN103428869A
Application number: CN2012101538366A
Authority: CN
Inventors: 汤斌淞; 罗海燕; 孙彦赞; 邓天乐
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-05-17
Filing date: 2012-05-17
Publication date: 2013-12-04
Anticipated expiration: 2032-05-17
Also published as: CN103428869B; WO2013170786A1

Abstract

The invention discloses a method for coordinating inter-cell interference. The method comprises the steps that the control base station of a first cell obtains the resource occupancy rate of the boundary users of the first cell, and sends the resource occupancy rate of the boundary users of the first cell to the control base station of a second cell; the second cell is an adjacent cell of the first cell, and the resource occupancy rate of the boundary users of the first cell is used by the control base station of the second cell for configuring nearly-empty subframes sent downwards; the control base station of the first cell receives the nearly-empty subframes information configured by the control base station of the second cell, the boundary users of the first cell are scheduled on the subframes sent downwards of the first cell, and the time-domain positions of the subframes are identical with the time-domain positions of the nearly-empty subframes sent downwards of the second cell. The invention further discloses the base station and a communication system. The method, the base station and the communication system for coordinating the inter-cell interference can reasonably configure the nearly-empty subframes sent downwards of interference cells and improve the capacity of coordinating the inter-cell interference.

Description

The method of Inter-Cell Interference Coordination, base station and communication system

Technical field

The present invention relates to communication technical field, relate in particular to a kind of method, base station and communication system of Inter-Cell Interference Coordination.

Background technology

In a wireless communication system, subscriber equipment (User Equipment, UE) transmitting data and/or control information are given in base station on down link, and receive data and/or the control information of subscriber equipment on up link.

With Long Term Evolution (Long Term Evolution, LTE) system is example, base station is at Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) to UE, send control information, UE, by reading the control information of the upper carrying of PDCCH, is known the information such as paging, system message and scheduling frequency domain resource position.The upper reading out data of the Physical Downlink Shared Channel (Physical Downlink Share Channel, PDSCH) that then UE is scheduled to it according to above-mentioned information.Especially, base station is at Physical Control Format Indicator Channel (Physical Control Format Indictor Channel, PCFICH) actual several OFDMs (the Orthogonal Frequency Division Multiplexing that takies of upper indication PDCCH, OFDM) code element, be generally 1 ~ 3; When descending Physical Resource Block (PRB, Physical Resource Block) number is less than at 10 o'clock, above-mentioned value is 2 ~ 4.Generally speaking, UE is known the time domain original position of PDSCH running time-frequency resource according to PCFICH; According to the information of PDCCH carrying, know the frequency domain position of the PDSCH running time-frequency resource that it is assigned simultaneously.If UE reads the PDCCH failure, can't obtain the data of the upper carrying of follow-up PDSCH, so the performance of PDCCH is most important for community.

At Wireless Heterogeneous Networks (Heterogeneous Network, HetNet) in, with macrocell (Macro cell) and Pico cell community (Pico cell, the abbreviation Microcell) scene of shared frequency spectrum is example, because the transmitting power of Pico cell and Macro cell differs greatly, generally be respectively 30dBm and 46dBm, so the UE of Pico cell can be subject to the severe jamming from Macro cell when receiving PDCCH, cause the PDCCH performance low.If Pico cell introduces cell range expansion (Cell Range Extension, CRE) technology, the performance of its PDCCH worsens more.Therefore, third generation partner program (Third Generation Partnership Project, 3GPP) introduce minizone enhancement mode interference coordination (the enhanced Inter-Cell Interference Coordination of time domain (time domain), eICIC) mechanism, descending problem of inter-cell interference while being intended to solve dissimilar community mixed deployment in the HetNet network by gap frame (Almost Blank Subframe, ABS) almost.Wherein, the ABS subframe refers to the transmission of only having public guide frequency on this subframe, perhaps only have the transmission of public guide frequency and the control channel transmitted with low-power (or low activity mode), above-mentioned two schemes is called ABS zero energy scheme and ABS low power schemes.Wherein, zero energy and low-power are for PDCCH.Interfered cell (aggressive cell) is configured to the ABS subframe by self indivedual descending sub frame, with this, reduces the community that is injured (victim cell) downlink transfer, particularly to the interference of down control channel.Referring to Fig. 1, it is the structural representation of Wireless Heterogeneous Networks system in prior art.The scene that macrocell Macro, Pico cell community Pico 1 and the Pico cell community Pico 2 of take shares frequency spectrums is example, and as shown in Figure 2, Macro is configured to descending

sub frame

1,2 ABS of " zero energy ", the business transmission of protection Pico1 and Pico 2; Macro is configured to descending

sub frame

6,7 ABS of " low-power ", the business transmission of protection Pico2; Thereby solve descending problem of inter-cell interference.

Yet still there are the following problems for ABS mechanism: need to determine that Pico cell needs the ABS subframe of how much quantity to protect its business not disturbed by macro base station, because for Macro cell, polygamy is put the ABS subframe can cause the wasting of resources.Current standard is to determine the quantity of ABS subframe according to the size of current Pico cell traffic carrying capacity, and the size of Pico traffic carrying capacity is to describe by the occupancy of the Resource Block on the ABS subframe (Resource Block, RB).RB occupancy on mutual ABS between Pico cell and Macro cell, when occupancy is high, Macro cell distributes more ABS subframe to Pico cell.But, for Pico cell, its business divide centered by business and edge service.Diagonal line hatches zone as shown in Figure 1 is the CRE zone of Pico cell, and the UE in the CRE zone is merely able to scheduling on ABS.And at Pico cell center, the noise cancellation signal noise jamming is lower, signal to noise ratio (Signal to Interference plus Noise Ratio, SINR) can meet the scheduling requirement, so the UE at Pico cell center can dispatch on the ABS subframe or on the Non-ABS subframe.By the RB occupancy on ABS, the size of current Pico cell traffic carrying capacity is described in the speech standard therefrom not accurate enough, even can be described as wrong, because the UE at Pico cell center is more, the probability of scheduling on ABS is just higher, and the degree of deviation of the ABS amount needed is also higher.Especially in Pico cell power up, Macro cell there is no the ABS subframe, and this also makes by the resource of ABS protection and can't weigh.

As mentioned above, cell range is expanded for Pico cell, and the UE in the CRE zone is merely able to scheduling on ABS, thereby the ABS of macro base station is very important for Pico cell.When the ABS power ascension, its interference to the Pico cell business on the ABS time slot also promotes to some extent; When ABS power reduces, and even, while being reduced to zero energy, can reduce the interference to the Pico cell business on the ABS time slot.In like manner, when the CRE zone of Pico cell increases, in order to reduce presence of intercell interference, its best mode is also further to reduce the ABS power of Macro cell.As shown in Figure 1, when the CRE of Pico cell zone increases (being that the diagonal line hatches zone increases), ABS(A line) power need to be coordinated to reduce, and could meet better the purpose of design of reduce disturbance.But, there is no at present the mechanism of dynamic coordinate ABS after the CRE regional change.

Summary of the invention

Many aspects of the present invention provide a kind of method, base station and communication system of Inter-Cell Interference Coordination, and the almost gap frame of descending transmission that can the reasonable disposition interfered cell improves the ability of Inter-Cell Interference Coordination.

One aspect of the present invention provides a kind of method of Inter-Cell Interference Coordination, comprising: the control base station of the first community obtains the resources occupation rate of the boundary user of described the first community; The control base station of described the first community sends to the resources occupation rate of the boundary user of described the first community the control base station of the second community; Described the second community is the neighbor cell of described the first community, the almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community; The control base station of described the first community receives the almost gap frame information of the control base station configuration of described the second community, and described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community; The control base station of described the first community is according to described almost gap frame information, by the scheduling of the boundary user of described the first community, on the subframe of the descending transmission of described the first community, the time-domain position of described subframe is identical with the time-domain position of the almost gap frame of the descending transmission of described the second community.

Another aspect of the present invention provides a kind of base station, comprising: acquiring unit, transmitting element, receiving element and scheduling unit.Above-mentioned acquiring unit is for obtaining the resources occupation rate of boundary user of the first community.Above-mentioned transmitting element is for sending to the resources occupation rate of the boundary user of described the first community the control base station of the second community; Described the second community is the neighbor cell of described the first community, the almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community.The almost gap frame information that above-mentioned receiving element configures for the control base station that receives described the second community; Described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community.Above-mentioned scheduling unit is used for according to described almost gap frame information, by the scheduling of the boundary user of described the first community, on the subframe of the descending transmission of described the first community, the time-domain position of described subframe is identical with the time-domain position of the almost gap frame of the descending transmission of described the second community.

Another aspect of the present invention provides a kind of method of Inter-Cell Interference Coordination, comprising: the control base station of the first community obtains the resources occupation rate of the boundary user of described the first community; The control base station of described the first community sends to the resources occupation rate of the boundary user of described the first community the control base station of the second community; Described the second community is the neighbor cell of described the first community, and the control base station of described the first community and the control base station of described the second community are different base stations, and described the first community and described the second community have same carrier wave; The almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community; The control base station of described the first community receives the interfere information of the control base station of described the second community; Described interfere information comprises almost gap frame information, and described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community; The switch of described the first community, according to described interfere information, is controlled in the control base station of described the first community.

Another aspect of the present invention provides a kind of base station, comprising: acquiring unit, transmitting element, receiving element and control unit.Above-mentioned acquiring unit is for obtaining the resources occupation rate of boundary user of the first community.Above-mentioned transmitting element is for by the resources occupation rate of the boundary user of described the first community and send to the control base station of the second community; Described the second community is the neighbor cell of described the first community, and the control base station of described the first community and the control base station of described the second community are different base stations, and described the first community and described the second community have same carrier wave; The almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community.Above-mentioned receiving element is for receiving the interfere information of control base station of described the second community, and described interfere information comprises almost gap frame information; Described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community.Above-mentioned control unit, for according to described interfere information, is controlled the switch of described the first community.

Another aspect of the present invention provides a kind of communication system, it is characterized in that, comprises the control base station of the first community and the control base station of the second community; The control base station of described the first community is arbitrary base station as above; The control base station of described the second community is used for the resources occupation rate according to the boundary user of described the first community, the almost gap frame that configurating downlink sends, and send almost gap frame information to the control base station of described the first community.

Another aspect of the present invention provides a kind of method of Inter-Cell Interference Coordination, comprising: the control base station of the 3rd community receives the interfere information that the control base station of the second community issues; Described interfere information comprises the resources occupation rate of the control base station of described the second community according to the boundary user of the first community, the quantity of the almost gap frame of the descending transmission of configuration; The switch of described the 3rd community, according to described interfere information, is controlled in the control base station of described the 3rd community; Wherein, described the first community, described the second community and described the 3rd community are neighbor cells; The control base station of the control base station of described the first community, the control base station of described the second community and described the 3rd community is different base station, and described the first community, described the second community and described the 3rd community have same carrier wave.

Another aspect of the present invention provides a kind of base station, comprising: receiving element, the interfere information issued for the control base station that receives described the second community; Described interfere information comprises the resources occupation rate of the control base station of described the second community according to the boundary user of the first community, the quantity of the almost gap frame of the descending transmission of configuration; And control unit, for according to described interfere information, control the switch of the 3rd community; Wherein, described the first community, described the second community and described the 3rd community are neighbor cells; The control base station of the control base station of described the first community, the control base station of described the second community and described the 3rd community is different base station, and described the first community, described the second community and described the 3rd community have same carrier wave.

The method of the Inter-Cell Interference Coordination that the embodiment of the present invention provides, base station and communication system; resources occupation rate according to the boundary user of the first community; the almost gap frame of descending transmission that can adjacent the second community of reasonable disposition; not only can protect the first Zone not to be subject to the second area interference; and, for the second community, can not cause the wasting of resources yet.The present invention is according to the almost gap frame information Resources allocation of the descending transmission of the second community, while the boundary user of the first community being dispatched on the subframe of descending transmission of the first community, the time-domain position of the subframe of dispatching is identical with the time-domain position of the almost gap frame of the descending transmission of the second community, perhaps control the switch of neighbor cell, can improve the ability of Inter-Cell Interference Coordination.

The accompanying drawing explanation

Fig. 1 is the structural representation of Wireless Heterogeneous Networks system in prior art;

Fig. 2 is the schematic diagram of the almost gap frame of interference coordination between the prior art small area;

Fig. 3 is the schematic flow sheet of a kind of method of Inter-Cell Interference Coordination in the embodiment of the present invention;

Fig. 4 is the schematic flow sheet of a kind of method of the Inter-Cell Interference Coordination by X2 interface or S1 interface transmission resources occupation rate in the embodiment of the present invention;

Fig. 5 is the schematic flow sheet of a kind of method of the Inter-Cell Interference Coordination that transmits resources occupation rate by OAM in the embodiment of the present invention;

Fig. 6 is the schematic flow sheet of a kind of method of the Inter-Cell Interference Coordination by X2 interface or S1 interface transmission CRE configuration information in the embodiment of the present invention;

Fig. 7 is the schematic flow sheet of a kind of method of the Inter-Cell Interference Coordination that transmits the CRE configuration information by OAM in the embodiment of the present invention;

Fig. 8 is the schematic flow sheet of the method for another kind of Inter-Cell Interference Coordination in the embodiment of the present invention;

Fig. 9 is the schematic flow sheet of the method for another kind of Inter-Cell Interference Coordination in the embodiment of the present invention;

Figure 10 is the structural representation of a kind of base station in the embodiment of the present invention;

Figure 11 is the structural representation of the transmitting element of the base station shown in Figure 10;

Figure 12 is the structural representation of a kind of communication system in the embodiment of the present invention;

Figure 13 is the schematic flow sheet of the method for another kind of Inter-Cell Interference Coordination in the embodiment of the present invention;

Figure 14 is the structural representation of another kind of base station in the embodiment of the present invention;

Figure 15 is the structural representation of the control unit of the base station shown in Figure 14;

Figure 16 is the structural representation of another kind of communication system in the embodiment of the present invention;

Figure 17 is the schematic flow sheet of the method for another kind of Inter-Cell Interference Coordination in the embodiment of the present invention;

Figure 18 is the structural representation of another kind of base station in the embodiment of the present invention;

Figure 19 is the structural representation of the control unit of the base station shown in Figure 18;

Figure 20 is the structural representation of another kind of communication system in the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.

Referring to Fig. 3, the method for the Inter-Cell Interference Coordination that the embodiment of the present invention provides, comprise following content.

The control base station of S30, the first community obtains the resources occupation rate of the boundary user of the first community.

The control base station of S31, the first community sends to the resources occupation rate of the boundary user of described the first community the control base station of the second community.Described the second community is the neighbor cell of described the first community; The almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community.

S32, receive the almost gap frame information of the control base station configuration of described the second community.Described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community.Above-mentioned almost gap frame information can be indicated in the subframe of descending transmission of the second community, and which is gap frame almost, and which right and wrong is the gap frame almost.

S33, according to described almost gap frame information, by the boundary user of described the first community scheduling on the subframe of the descending transmission of described the first community.The time-domain position of described subframe is identical with the time-domain position of the almost gap frame of the descending transmission of described the second community.

In S30, the control base station of described the first community obtains the resources occupation rate of the boundary user of the first community, comprises following content.

The control base station of S311, the first community receives the measurement report of the user equipment to report of described the first community, and described measurement report comprises the Reference Signal Received Power RSRP of described the first community ^PReference Signal Received Power RSRP with described the second community ^M.

If S312 is RSRP ^M-Bias≤RSRP ^P<RSRP ^M, the control base station of described the first community judges that described subscriber equipment is the boundary user of described the first community; If RSRP ^P<RSRP ^M-Bias or RSRP ^P>=RSRP ^M, the control base station of described the first community judges that described subscriber equipment is not the boundary user of described the first community.Wherein, Bias is pre-configured Reference Signal Received Power difference.

The resources occupation rate of the boundary user of described the first community is added up in the control base station of S313, the first community.

Wherein, subscriber equipment in the first community can be divided into boundary user and central user, boundary user refers to the subscriber equipment in cell range expansion (CRE) zone that is positioned at the first community, and central user refers to the subscriber equipment of the central area that is positioned at the first community.The boundary user of the first community is dispatched in low-power ABS subframe, and the central user scheduling is conducive to reduce disturb in non-ABS subframe, therefore the UE in the first community is distinguished, can the reasonable distribution Radio Resource.

In S313, the method of resources occupation rate of the boundary user of described the first community is added up in the control base station of described the first community, comprise: by the Resource Block quantity of the boundary user of described the first community, divided by whole Resource Block quantity of described the first community, obtain the resources occupation rate of the boundary user of described the first community; Or, by the Resource Block quantity of the boundary user of described the first community, divided by the Resource Block quantity of the edge band of described the first community, obtain the resources occupation rate of the boundary user of described the first community.

Wherein, utilizing cell edge frequency band refers to and is planned as in advance the Resource Block that priority scheduling is used to boundary user, when the non-boundary user, just can dispatch to central user.

The almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community, be the resources occupation rate of the control base station of described the second community according to the boundary user of described the first community, the almost gap frame that configurating downlink sends, specifically comprise: the control base station of described the second community compares the resources occupation rate of the boundary user of described the first community respectively with the first threshold value, the second threshold value; Described the first threshold value is less than described the second threshold value.If the resources occupation rate of the boundary user of described the first community is less than described the first threshold value, the almost gap frame of the descending transmission of described the second community reduces N ₁Individual, N ₁>=1; If the resources occupation rate of the boundary user of described the first community is greater than described the second threshold value, the almost gap frame of the descending transmission of described the second community increases N ₂Individual, N ₂>=1; If the resources occupation rate of the boundary user of described the first community is more than or equal to described the first threshold value, and the resources occupation rate of the boundary user of described the first community is less than or equal to described the second threshold value, do not change the quantity of almost gap frame of the descending transmission of described the second community.

During concrete enforcement, can set the first threshold value, the second threshold value, N according to actual conditions ₁And N ₂Value.

Optionally, the control base station of described the first community sends to the resources occupation rate of the boundary user of described the first community the control base station of the second community, comprise: the control base station of described the first community sends the control base station of the second community to by X2 interface, perhaps by S 1 interface, send the control base station of the second community to, perhaps by Operations,Administration And Maintenance (Operation Administration and Maintenance, OAM) center sends the control base station of the second community to, perhaps by the interface between base station and base station telegon (eCordinator), send the control base station of the second community to.Wherein, the base station telegon can be connected with a plurality of base stations, realizes the functions such as combined dispatching between each base station, synchronous and control signal forwarding.

The method of the Inter-Cell Interference Coordination that the present embodiment provides, almost gap frame information Resources allocation according to the descending transmission of the second community, while the boundary user of the first community being dispatched on the subframe of descending transmission of the first community, the time-domain position of the subframe of dispatching is identical with the time-domain position of the almost gap frame of the descending transmission of the second community, can improve the ability of Inter-Cell Interference Coordination.

On the basis of above-mentioned Fig. 3 embodiment, below in conjunction with Fig. 4 and Fig. 5, to the transmission of resources occupation rate and almost the configuration flow of gap frame be described in detail.

Referring to Fig. 4, by X2 interface or S1 interface, transmit resources occupation rate and the ABS configuration flow comprises following content.

The business transmission is carried out in the control base station of S401, subscriber equipment and the first community.

The control base station of S402, the first community is after the resources occupation rate that obtains boundary user, X2 interface between control base station by the first community and the control base station of the second community or by the S1 interface, be delivered to the resources occupation rate of the boundary user of the first community the control base station of the second community.

After the resources occupation rate of boundary user of the first community is received in the control base station of S403, the second community, the almost gap frame sent according to the resources occupation rate configurating downlink of the boundary user of described the first community; And the X2 interface between the control base station of the control base station by the first community and the second community or by the S1 interface, gap frame information is almost passed to the control base station of the first community.

Referring to Fig. 5, by OAM, transmit resources occupation rate and the ABS configuration flow comprises following content.

The business transmission is carried out in the control base station of S501, subscriber equipment and the first community.

The control base station of S502, the first community, after the resources occupation rate of the boundary user that obtains described the first community, is delivered to OAM by the resources occupation rate of the boundary user of described the first community.

S503, OAM are delivered to the resources occupation rate of the boundary user of the first community the control base station of the second community.

After the resources occupation rate of boundary user of the first community is received in the control base station of S504, the second community, the almost gap frame sent according to the resources occupation rate configurating downlink of the boundary user of described the first community; And the X2 interface between the control base station of the control base station by the first community and the second community or by the S1 interface, gap frame information is almost passed to the control base station of the first community.

In addition, the control base station of the first community is after the resources occupation rate of the boundary user that obtains described the first community, can also be by the control base station of the first community and the interface between the telegon of base station, the resources occupation rate of the boundary user of described the first community is passed to the base station telegon, again by the base station telegon by the interface between the control base station of described base station telegon and the second community, the resources occupation rate of the boundary user of described the first community is passed to the control base station of the second community.After the resources occupation rate of boundary user of described the first community is received in the control base station of the second community, the almost gap frame sent according to the resources occupation rate configurating downlink of the boundary user of described the first community, and by the control base station of the second community and the interface between the telegon of base station, almost the gap frame information passes to the base station telegon, again by the base station telegon by the interface between the control base station of described base station telegon and the first community, described almost gap frame information is passed to the control base station of the first community.

The method of the Inter-Cell Interference Coordination that the present embodiment provides, according to the resources occupation rate of the boundary user of the first community, the ABS subframe of the descending transmission of the second community that reasonable disposition is adjacent; While the boundary user of the first community being dispatched on the subframe of descending transmission of the first community; the time-domain position of the subframe of dispatching is identical with the time-domain position of the almost gap frame of the descending transmission of the second community; not only can protect the first Zone not to be subject to the second area interference; and, for the second community, can not cause the wasting of resources yet.

In one embodiment, the method of the Inter-Cell Interference Coordination that the present embodiment provides, can be when the start of the control base station of the first community, resources occupation rate according to the boundary user of the first community, configure the almost gap frame of the descending transmission of the second community, specific as follows: when the start of the control base station of the first community, the second community does not arrange any ABS.Therefore, according to current agreement, can't weigh the load(flow in ABS), after the first cell configuration CRE, the CRE zone starts to be interfered.Under this scene; the method of the Inter-Cell Interference Coordination that execution above-described embodiment provides; determine the boundary user in the first community, according to the resources occupation rate of the boundary user in the first community, coordinate the first needed ABS sub-frame number in community, protect the first Zone not to be subject to the second area interference.And the wasting of resources, according to the ABS sub-frame number of the descending transmission of resources occupation rate reasonable disposition of the boundary user of the first community, for the second community, can not caused in the control base station of the second community yet.

In another embodiment, the method for the Inter-Cell Interference Coordination that the embodiment of the present invention provides, by CRE configuration is monitored, almost gap frame that can the descending transmission of dynamic coordinate the second community after the CRE regional change.

In addition, the method of the Inter-Cell Interference Coordination that the present embodiment provides, before above-mentioned S30, also further comprise: carry out cell range when expansion in the first community, send cell range expanded configuration information (can referred to as " CRE configuration information ") to the control base station of the second community; Described cell range expanded configuration information comprises cell range expansion bias (CRE bias value), and the time of enabling described cell range expansion bias; Described cell range expanded configuration information is for notifying the control base station change cell range expanded configuration of described the second community; Receive the cell range extended response information that the control base station of described the second community is returned.

Wherein, the time of enabling CRE bias value can be absolute time, or relative time.

Absolute time comprises: clock time; When the first community and the second community agreement arrive this clock time point, enable cell range expansion CRE configuration afterwards.

Relative time comprises: certain subframe numbers; When the subframe of the first community and the transmission of the second cell downlink arrives described subframe numbers, bring into use cell range expansion CRE bias value afterwards.

Relative time also comprises: is positioned at and receives after the CRE configuration information, and N subframe numbers before returning to CRE configuration response information.The second community is arranged after receiving the CRE configuration information in the first community, and N, interval subframe both sides just start jointly to enable cell range expansion CRE bias value afterwards.Wherein, relative time (as N subframe numbers), except being carried when sending the CRE configuration information by the control base station of the first community, can also be carried by the control base station of the second community when sending CRE configuration response information.

It should be noted that, if the CRE configuration response information of returning the control base station of the second community is not received in the control base station of the first community, the CRE configuration information will be repeated to send in the control base station of the first community so.

In one embodiment, the first cell change cell range expanded configuration can be to carry out stepping CRE expansion when the start of the control base station of described the first community, specific as follows:

When the start of the control base station of the first community, stepping starts the CRE expansion.For example, CRE, from 0dB, be take 0.5dB as the expansion step-length, take 0.5 hour as extended interval, attempts expansion CRE zone.The CRE expansion stops under following situation:

1) the first whole cell business volume in community reaches a certain threshold value; For example the RB occupancy reaches 85%, illustrate and reach the network planning design of receiving abundant UE business, has reached the purpose that the first community is placed by operator;

2), in the CRE expanding course of the first community, PDCCH Block Error Rate (Block Error Ratio, BLER), higher than a certain thresholding, for example, higher than 0.1%, illustrates that the zone of CRE expansion is interfered enough greatly, no longer is applicable to CRE and expands;

3) CRE expands and to have reached the upper limit that the CRE value can be set in the first community.

In the first community, expand in the process of CRE configuration, each step CRE changes, X2 interface is all passed through in the control base station of the first community, perhaps by the S1 interface, perhaps pass through OAM, or in time the CRE configuration information is sent to the control base station of the second community by the interface between base station and base station telegon.

Below in conjunction with Fig. 6 and Fig. 7, the conveying flow of CRE configuration is described in detail.

As shown in Figure 6, the business transmission is carried out in the control base station of subscriber equipment and the first community.The method of CRE configuration information is transmitted in the control base station of the first community and the control base station of the second community by X2 interface or S1 interface, comprise following content.

S601, when the first cell change cell range expanded configuration, control base station by the first community, X2 interface between control base station by the first community and the control base station of the second community or by S 1 interface, be delivered to the CRE configuration information control base station of the second community.

After the CRE configuration information is received in the control base station of S602, the second community, changing cells scope expanded configuration, and the X2 interface between the control base station of the control base station by the first community and the second community or by the S1 interface, return to CRE configuration response information to the control base station of the first community.

As shown in Figure 7, the business transmission is carried out in the control base station of subscriber equipment and the first community.Comprising of CRE configuration information of following content is transmitted by OAM in the control base station of the first community and the control base station of the second community.

S701, when the first cell change cell range expanded configuration, the control base station of the first community is delivered to OAM by the CRE configuration information.

S702, OAM are delivered to the CRE configuration information control base station of the second community.

After the CRE configuration information is received in the control base station of S703, the second community, changing cells scope expanded configuration, and return to CRE configuration response information to OAM.

S704, OAM return to CRE configuration response information to the control base station of the first community.

In addition, the present embodiment can also transmit the CRE configuration information by the interface between base station telegon and base station, the flow process of resources occupation rate of boundary user that its conveying flow and the above-mentioned interface passed through between base station telegon and base station transmit the first community is identical, at this, is not described in detail.

In another embodiment, the first cell change cell range expanded configuration can be to reconfigure CRE, such as: operator is due to reasons such as the network optimization or fault eliminatings, need to reconfigure the CRE of the first community, the increasing or decreasing that comprises CRE bias value, or configure a new CRE bias value by OAM.In the specific implementation process, for example, (as the RB occupancy surpasses 95% or disturb obviously for a long time, or PDCCH BLER is higher than threshold value 0.2% etc.), need the first community reduce CRE bias value when the first Zone when excessive.Wherein, the process of carrying out stepping CRE expansion when the process of configuration CRE is started shooting with the above-mentioned base station of the control in the first community is identical, at this, no longer describes in detail.

In above-described embodiment, when the start of the control base station of the first community, carry out stepping CRE expansion or reconfigure CRE, all can cause the variation in CRE zone.And CRE zone becomes large or diminish and can cause that the scope that community covers changes, will cause in fact accessing the variation of the UE quantity of community, the variation that brings thus the first cell edge flow.After edge flow changes, the edge service of the first community can only carry out on ABS, under this scene, the method of the Inter-Cell Interference Coordination provided by execution above-described embodiment, coordinate the first needed ABS sub-frame number in community according to the resources occupation rate of the boundary user in the first community, can meet the demand of transfer of data of the boundary user of the first community.

In embodiments of the present invention, when the CRE size changes, can pass through X2 interface, S1 interface or OAM dynamic coordinate ABS.Below in conjunction with Fig. 8 and Fig. 9, be described in detail.

Referring to Fig. 8, the present embodiment provides the method for another kind of Inter-Cell Interference Coordination.The business transmission is carried out in the control base station of subscriber equipment and the first community, and when the CRE size changes, the present embodiment, by X2 interface or by S1 interface dynamic coordinate ABS, specifically comprises following content.

S801, when the first cell change cell range expanded configuration, control base station by the first community, X2 interface between control base station by the first community and the control base station of the second community or by the S1 interface, be delivered to the CRE configuration information control base station of the second community.Described the first community and the second community are neighbor cells.

After the CRE configuration information is received in the control base station of S802, the second community, changing cells scope expanded configuration, and the X2 interface between the control base station of the control base station by the first community and the second community or by the S1 interface, return to CRE configuration response information to the control base station of the first community.

The control base station of S803, the first community redefines the boundary user of the first community, add up the resources occupation rate of the boundary user of the first community, X2 interface between control base station by the first community and the control base station of the second community or by the S1 interface, be delivered to the resources occupation rate of the boundary user of the first community the control base station of the second community.

After the resources occupation rate of boundary user of the first community is received in the control base station of S804, the second community, the almost gap frame sent according to the resources occupation rate configurating downlink of the boundary user of described the first community; And the X2 interface between the control base station of the control base station by the first community and the second community or by the S1 interface, gap frame information is almost passed to the control base station of the first community.

Described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community.Above-mentioned almost gap frame information can be indicated in the subframe of descending transmission of the second community, and which is gap frame almost, and which right and wrong is the gap frame almost.

After the control base station of S805, the first community receives almost the gap frame information, according to described almost gap frame information by the boundary user of the first community scheduling on the subframe of the descending transmission of described the first community, the time-domain position of described subframe is identical with the time-domain position of the almost gap frame of the descending transmission of described the second community.

Referring to Fig. 9, the present embodiment provides the method for another kind of Inter-Cell Interference Coordination.The business transmission is carried out in the control base station of subscriber equipment and the first community, and when the CRE size changes, the present embodiment, by OAM dynamic coordinate ABS, specifically comprises following content.

S901, when the first cell change cell range expanded configuration, the control base station of the first community is delivered to OAM by the CRE configuration information.

S902, OAM are delivered to the CRE configuration information control base station of the second community.Described the first community and the second community are neighbor cells.

After the CRE configuration information is received in the control base station of S903, the second community, changing cells scope expanded configuration, and return to CRE configuration response information to OAM.

S904, OAM return to CRE configuration response information to the control base station of the first community.

The control base station of S905, the first community redefines the boundary user of the first community, adds up the resources occupation rate of the boundary user of the first community, and the resources occupation rate of the boundary user of the first community is delivered to OAM.

S906, OAM are delivered to the resources occupation rate of the boundary user of the first community the control base station of the second community.

After the resources occupation rate of boundary user of the first community is received in the control base station of S907, the second community, the almost gap frame sent according to the resources occupation rate configurating downlink of the boundary user of described the first community; And the X2 interface between the control base station of the control base station by the first community and the second community or by the S1 interface, gap frame information is almost passed to the control base station of the first community.

After the control base station of S908, the first community receives almost the gap frame information, according to described almost gap frame information by the boundary user of the first community scheduling on the subframe of the descending transmission of described the first community, the time-domain position of described subframe is identical with the time-domain position of the almost gap frame of the descending transmission of described the second community.

In addition, the present embodiment can also transmit by the interface between base station telegon and base station the resources occupation rate of the boundary user of the first community, almost gap frame information and CRE configuration information.

The embodiment of the present invention also provides base station as described in Figure 10 to reach communication system as described in Figure 12, can realize the flow process of the method for above-mentioned Inter-Cell Interference Coordination.

Referring to Figure 10, the present embodiment provides a kind of base station, comprising: acquiring unit 100, transmitting element 101, receiving element 102 and scheduling unit 103.

Above-mentioned acquiring unit 100 is for the resources occupation rate of the boundary user that obtains the first community.

Above-mentioned transmitting element 101 sends to the control base station of the second community for the resources occupation rate of the boundary user by described the first community.Described the second community is the neighbor cell of described the first community; The almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community.

The almost gap frame information that above-mentioned receiving element 102 configures for the control base station that receives described the second community; Described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community.

Above-mentioned scheduling unit 103 is for according to described almost gap frame information, by the scheduling of the boundary user of described the first community, on the subframe of the descending transmission of described the first community, the time-domain position of described subframe is identical with the time-domain position of the almost gap frame of the descending transmission of described the second community.

As shown in figure 11, described acquiring unit 100 specifically comprises: receive subelement 1011, determine subelement 1012 and process subelement 1013.

Above-mentioned reception subelement 1011 is for the measurement report of the user equipment to report that receives described the first community, and described measurement report comprises the Reference Signal Received Power RSRP of described the first community ^PReference Signal Received Power RSRP with described the second community ^M.

Above-mentioned definite subelement 1012 for: if RSRP ^M-Bias≤RSRP ^P<RSRP ^M, judge that described subscriber equipment is the boundary user of described the first community; If RSRP ^P<RSRP ^M– Bias or RSRP ^P>=RSRP ^M, judge that described subscriber equipment is not the boundary user of described the first community; Wherein, Bias is pre-configured Reference Signal Received Power difference.

Above-mentioned processing subelement 1013 is for the resources occupation rate of the boundary user of adding up described the first community.

Alternatively, described processing subelement 1013 can be further used for: by the Resource Block quantity of the boundary user of described the first community, divided by whole Resource Block quantity of described the first community, obtain the resources occupation rate of the boundary user of described the first community; Or, by the Resource Block quantity of the boundary user of described the first community, divided by the Resource Block quantity of the edge band of described the first community, obtain the resources occupation rate of the boundary user of described the first community.

Described transmitting element 101 also for: carry out cell range when expansion in described the first community, to the control base station of described the second community, send cell range expanded configuration information; Described cell range expanded configuration information comprises cell range expansion bias, and the time of enabling described cell range expansion bias; Described cell range expanded configuration information is for notifying the control base station change cell range expanded configuration of described the second community;

Described reception subelement 1011 also for: receive the cell range extended response information that the control base station of described the second community is returned.

The base station that the present embodiment provides, almost gap frame information Resources allocation according to the descending transmission of the second community, while the boundary user of the first community being dispatched on the subframe of descending transmission of the first community, the time-domain position of the subframe of dispatching is identical with the time-domain position of the almost gap frame of the descending transmission of the second community, can improve the ability of Inter-Cell Interference Coordination.

Referring to Figure 12, the present embodiment provides a kind of communication system, comprises the control base station 121 of the first community and the control base station 122 of the second community.

The control base station 121 of described the first community is above-mentioned Figure 10 and the described base station of Figure 11; The control base station 122 of described the second community is for the resources occupation rate of the boundary user according to described the first community, the almost gap frame that configurating downlink sends, and send almost gap frame information to the control base station of described the first community.

The control base station 122 of described the second community specifically comprises: comparing unit 1221 and dispensing unit 1222.Wherein, above-mentioned comparing unit 1221 compares with the first threshold value, the second threshold value respectively for the resources occupation rate of the boundary user by described the first community; Described the first threshold value is less than described the second threshold value.Above-mentioned dispensing unit 1222 for: if the resources occupation rate of the boundary user of described the first community is less than described the first threshold value, the almost gap frame of the descending transmission of described the second community reduces N ₁Individual, N ₁>=1; If the resources occupation rate of the boundary user of described the first community is greater than described the second threshold value, the almost gap frame of the descending transmission of described the second community increases N ₂Individual, N ₂>=1; If the resources occupation rate of the boundary user of described the first community is more than or equal to described the first threshold value, and the resources occupation rate of the boundary user of described the first community is less than or equal to described the second threshold value, do not change the quantity of almost gap frame of the descending transmission of described the second community.

Optionally, the control base station of described the first community is further used for passing through X2 interface, perhaps by the S1 interface, perhaps by Operations,Administration And Maintenance center O AM, perhaps, by the interface between base station and base station telegon, the resources occupation rate of the boundary user of described the first community is sent to the control base station of described the second community.The control base station of described the second community is further used for by X2 interface, or by the S1 interface, or by OAM, or, by the interface between base station and base station telegon, described almost gap frame information is sent to the control base station of described the first community.

The communication system that the present embodiment provides; resources occupation rate according to the boundary user of the first community; the almost gap frame of descending transmission that can adjacent the second community of reasonable disposition; not only can protect the first Zone not to be subject to the second area interference; and, for the second community, can not cause the wasting of resources yet.Simultaneously, almost gap frame information Resources allocation according to the descending transmission of the second community, while the boundary user of the first community being dispatched on the subframe of descending transmission of the first community, the time-domain position of the subframe of dispatching is identical with the time-domain position of the almost gap frame of the descending transmission of the second community, can improve the ability of Inter-Cell Interference Coordination.

Referring to Figure 13, the present embodiment provides the method for another kind of Inter-Cell Interference Coordination, comprises following content.

The control base station of S130, the first community obtains the resources occupation rate of the boundary user of described the first community.

The control base station of S131, described the first community sends to the resources occupation rate of the boundary user of described the first community the control base station of the second community.Described the second community is the neighbor cell of described the first community, and the control base station of described the first community and the control base station of the second community are different base stations, and described the first community and described the second community have same carrier wave; The almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community.

The control base station of S132, described the first community receives the interfere information of the control base station of described the second community.Described interfere information comprises almost gap frame information; Described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community.

The switch of described the first community, according to described interfere information, is controlled in the control base station of S133, described the first community.

In S130 and S131, the method of dynamic coordinate ABS while determining the method for the boundary user of the first community, the method for adding up the almost gap frame that the control base station configurating downlink of method, the method for transmitting resources occupation rate, the second community of resources occupation rate of the boundary user of the first community sends and cell range expansion, identical with the described embodiment of above-mentioned Fig. 3 ~ Fig. 9, do not repeat them here.

In S132, the control base station of described the first community is according to described interfere information, control the switch of described the first community, comprising: the control base station of described the first community compares described interfere information and preset threshold value, according to comparative result, judges whether to close described the first community; If need to close described the first community, the subscriber equipment in described the first community is switched to the 3rd community, and closes described the first community; Close described the first community if do not need, the boundary user of described the first community is switched to described the 3rd community, do not close described the first community.

Wherein, the control base station of the control base station of described the first community and described the 3rd community is identical base station, and described the first community and described the 3rd community have different carrier.

Wherein, the first community He Di tri-communities are communities of two different carriers in same control base station, carrier aggregation (the carrier aggregation of a plurality of carrier waves has been used in this base station, CA) community, can selectively unlocking or closes a certain community in base station, perhaps switching dredge UE from the community of a carrier wave community to another carrier wave so that coordinate the interference of minizone.

The first community and the second community are the communities with same carrier wave in two different base stations, the ABS quantity of the descending transmission of the control base station of the second community is more, illustrate that the resources occupation rate of dispatching the first community is higher on CRE, namely the traffic carrying capacity on CRE is larger, or the UE in the CRE zone is more, this illustrates that the suffered interference in the first community is more serious.In the present embodiment, carrier wave can be selected according to the ABS quantity in ABS information in base station, for example, when ABS quantity is 1, illustrates to disturb to exist but not serious, can use this first community.For example, during more than a certain thresholding (threshold value is 2), serious interference is described when ABS quantity, need to closes the first community, use other community, or the UE of the first community is switched on other communities.

In an optional execution mode, X2 interface is passed through in the control base station of the second community, or by the S1 interface, or by OAM, or, by the interface between base station and base station telegon, described interfere information is sent to the control base station of the first community.Described interfere information can also comprise high interference indication (High Interference Indicator, HII), overload indication (Overload Indicator, OI), Relative Narrowband TX Power (Relative NarrowbandTX Power Indicator, RNTP), Block Error Rate (Block Error Rate, BLER), at least one in channel quality indication (Channel Quality Indicator, CQI).Judge whether that the method that need to close community is: each item number certificate in interfere information is compared with corresponding threshold value; If each item number, according to all being greater than corresponding threshold value, shows that the first area interference is serious, need to close the first community; Otherwise do not need to close community.

The method of the Inter-Cell Interference Coordination that the present embodiment provides, according to the almost gap frame information Resources allocation of the descending transmission of the second community, control the switch of neighbor cell, can improve the ability of Inter-Cell Interference Coordination.

The embodiment of the present invention also provides base station as shown in figure 14 and communication system as shown in figure 16, can realize the flow process of the method for the described Inter-Cell Interference Coordination of above-mentioned Figure 13.

Referring to Figure 14, the base station that the present embodiment provides comprises: acquiring unit 140, transmitting element 141, receiving element 142 and control unit 143.

Above-mentioned acquiring unit 140, for the resources occupation rate of the boundary user that obtains the first community.

Above-mentioned transmitting element 141 sends to the control base station of the second community for the resources occupation rate of the boundary user by the first community.Described the second community is the neighbor cell of described the first community, and the control base station of described the first community and the control base station of the second community are different base stations, and described the first community and described the second community have same carrier wave; The almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community.

Above-mentioned receiving element 142 is for the interfere information of the control base station that receives described the second community, and described interfere information comprises almost gap frame information.Described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community.

Above-mentioned control unit 143, for according to described interfere information, is controlled the switch of described the first community.

Wherein, the acquiring unit 100 of acquiring unit 140 and transmitting element 141 and above-mentioned Figure 10 and Figure 11 is identical with the 26S Proteasome Structure and Function of transmitting element 101, does not repeat them here.

As shown in figure 15, described control unit 143 specifically comprises: judgment sub-unit 1431 and coordination subelement 1432.

Above-mentioned judgment sub-unit 1431, for described interfere information and preset threshold value are compared, judges whether to close described the first community according to comparative result.Above-mentioned coordination subelement 1432 for: if need to close described the first community, the subscriber equipment in described the first community is switched to the 3rd community, and closes described the first community; Close described the first community if do not need, the boundary user of described the first community is switched to described the 3rd community, do not close described the first community.

Wherein, the control base station of the control base station of described the first community and described the 3rd community is identical base station, and described the first community and described the 3rd community have different carrier.Described interfere information also comprises at least one in HII, OI, RNTP, BLER, CQI.

Alternatively, the resources occupation rate of the boundary user of described the first community, to send the control base station of described the second community to by X2 interface, perhaps by the S1 interface, send the control base station of described the second community to, perhaps by OAM, send the control base station of described the second community to, or send the control base station of described the second community by the interface between base station and base station telegon to.

The base station of the Inter-Cell Interference Coordination that the present embodiment provides, according to the almost gap frame information Resources allocation of the descending transmission of the second community, control the switch of neighbor cell, can improve the ability of Inter-Cell Interference Coordination.

Referring to Figure 16, a kind of communication system that the present embodiment provides, comprise the control base station 161 of the first community and the control base station 162 of the second community.

The control base station 161 of described the first community is above-mentioned Figure 14 and the described base station of Figure 15.The control base station 162 of described the second community, for the resources occupation rate of the boundary user according to described the first community, the almost gap frame that configurating downlink sends, and send almost gap frame information to the control base station of described the first community.

The control base station 162 of described the second community specifically comprises: comparing unit 1621 and dispensing unit 1622.Wherein, above-mentioned comparing unit 1621 for: the resources occupation rate of the boundary user of described the first community is compared with the first threshold value, the second threshold value respectively; Described the first threshold value is less than described the second threshold value.Above-mentioned dispensing unit 1622, if be less than described the first threshold value for the resources occupation rate of the boundary user of described the first community, the almost gap frame of the descending transmission of described the second community reduces N ₁Individual, N ₁>=1; If the resources occupation rate of the boundary user of described the first community is greater than described the second threshold value, the almost gap frame of the descending transmission of described the second community increases N ₂Individual, N ₂>=1; If the resources occupation rate of the boundary user of described the first community is more than or equal to described the first threshold value, and the resources occupation rate of the boundary user of described the first community is less than or equal to described the second threshold value, do not change the quantity of almost gap frame of the descending transmission of described the second community.

Optionally, X2 interface can be passed through in the control base station of described the first community, or by the S1 interface, or pass through OAM, perhaps, by the interface between base station and base station telegon, the resources occupation rate of the boundary user of described the first community is sent to the control base station of described the second community; X2 interface can be passed through in the control base station of described the second community, or by the S1 interface, or by OAM, or, by the interface between base station and base station telegon, described interfere information is sent to the control base station of described the first community.

The communication system that the present embodiment provides; resources occupation rate according to the boundary user of the first community; the almost gap frame of descending transmission that can adjacent the second community of reasonable disposition; not only can protect the first Zone not to be subject to the second area interference; and, for the second community, can not cause the wasting of resources yet.Simultaneously, according to the almost gap frame information Resources allocation of the descending transmission of the second community, control the switch of neighbor cell, can improve the ability of Inter-Cell Interference Coordination.

Referring to Figure 17, the present embodiment provides the method for another kind of Inter-Cell Interference Coordination, comprises following content.

The control base station of S171 ,Di tri-communities receives the interfere information that the control base station of the second community issues; Described interfere information comprises the resources occupation rate of the control base station of described the second community according to the boundary user of the first community, the quantity of the almost gap frame of the descending transmission of configuration.

The switch of described the 3rd community, according to described interfere information, is controlled in the control base station of S172, described the 3rd community.

Wherein, described the first community, described the second community and described the 3rd community are neighbor cells; The control base station of the control base station of described the first community, the control base station of described the second community and described the 3rd community is different base station, and described the first community, described the second community and described the 3rd community have same carrier wave.

It should be noted that, the method of dynamic coordinate ABS when the method for the boundary user of how to confirm the first community in this enforcement, the method for adding up the almost gap frame that the control base station configurating downlink of method, the method for transmitting resources occupation rate, the second community of resources occupation rate of the boundary user of the first community sends and cell range expansion, identical with the described embodiment of above-mentioned Fig. 3 ~ Fig. 9, do not repeat them here.

In S172, the control base station of described the 3rd community is according to described interfere information, control the switch of described the 3rd community, comprising: the control base station of described the 3rd community compares described interfere information and preset threshold value, according to comparative result, judges whether to close described the 3rd community.If need to close described the 3rd community, close described the 3rd community, and open the 4th community; Close described the 3rd community if do not need, do not close described the 3rd community, and do not open described the 4th community.Wherein the control base station of He Di tetra-communities, control base station of ，Di tri-communities is identical base stations, and described the 3rd community and described the 4th community have different carrier.The CA community has been used in the control base station of the 3rd community He Di tetra-communities, can selectively unlocking or close a certain community in base station, or switching dredge UE from the community of a carrier wave community to another carrier wave so that coordinate the interference of minizone.

The first community, the second community He Di tri-communities are the communities with same carrier wave in three different base stations, the ABS quantity of the descending transmission of the control base station of the second community is more, illustrate that the resources occupation rate of dispatching the first community is higher on CRE, namely the traffic carrying capacity on CRE is larger, or the UE in the CRE zone is more, this illustrates that the suffered interference in the first community is more serious.For example, when ABS quantity, more than 2 the time, serious interference is described, adjacent base station is closed with the first community and is had same carrier frequencies De Di tri-communities, and opens another carrier wave De Di tetra-communities.

In an optional execution mode, X2 interface is passed through in the control base station of the second community, or by the S1 interface, or by OAM, or, by the interface between base station and base station telegon, described interfere information is sent to the control base station of the 3rd community.Described interfere information can also comprise at least one in HII, OI, RNTP, BLER, CQI.Judge whether that the method that need to close the 3rd community is: each item number certificate in interfere information is compared with corresponding threshold value; If each item number, according to all being greater than corresponding threshold value, shows that the first area interference is serious, need to close the 3rd community; Otherwise do not need to close the 3rd community.

Further, work as serious interference, when judgement need to be closed the 3rd community, if in the 3rd community, UE is arranged, so first open the 4th community, after the UE in Jiang Di tri-communities is switched to the 4th community, then close the 3rd community.If do not have UE(for example in when start ，Di tri-communities, control base station of Zai Di tri-communities, there is no UE in the 3rd community), so directly close the 3rd community, and open the 4th community.

The method of the Inter-Cell Interference Coordination that the present embodiment provides, the interfere information that the control base station by reception of neighboring cell issues, and, according to described interfere information, control the switch of neighbor cell, can improve the ability of Inter-Cell Interference Coordination.

The embodiment of the present invention also provides base station as shown in figure 18 and communication system as shown in figure 20, can realize the flow process of the method for the described Inter-Cell Interference Coordination of Figure 17.

Referring to Figure 18, the base station that the present embodiment provides comprises: receiving element 181 and control unit 182.

The interfere information that above-mentioned receiving element 181 issues for the control base station that receives described the second community; Described interfere information comprises the resources occupation rate of the control base station of described the second community according to the boundary user of the first community, the quantity of the almost gap frame of the descending transmission of configuration.Above-mentioned control unit 182, for according to described interfere information, is controlled the switch of the 3rd community.

As shown in figure 19, described control unit 182 specifically comprises: judgment sub-unit 1821 and coordination subelement 1822.

Above-mentioned judgment sub-unit 1821, for described interfere information and preset threshold value are compared, judges whether to close described the 3rd community according to comparative result; Above-mentioned coordination subelement 1822 for: if need to close described the 3rd community, close described the 3rd community, and open the 4th community; Close described the 3rd community if do not need, do not close described the 3rd community, and do not open described the 4th community.

Wherein, the control base station of the control base station of described the 3rd community and described the 4th community is identical base station, and described the 3rd community and described the 4th community have different carrier.Described interfere information also comprises at least one in HII, OI, RNTP, BLER, CQI.

The base station that the present embodiment provides, the interfere information that the control base station by reception of neighboring cell issues, and, according to described interfere information, control the switch of neighbor cell, can improve the ability of Inter-Cell Interference Coordination.

Referring to Figure 20, the communication system that the embodiment of the present invention provides, comprise the control base station 203 of 202 He Di tri-communities, control base station of control base station 201, second community of the first community.

The control base station 203 of described the 3rd community is the described base station of Figure 18 and Figure 19; The control base station 202 of described the second community is for the resources occupation rate of the boundary user according to described the first community, the almost gap frame that configurating downlink sends.

Optionally, X2 interface is passed through in the control base station 201 of the first community, or by the S1 interface, or, by OAM, the resources occupation rate of the boundary user of the first community is sent to the control base station 202 of the second community; The control base station 202 of the second community is by X2 interface, or by the S1 interface, or by OAM, by interfere information or almost the gap frame information send the control base station 203 of the 3rd community to.

The communication system that the present embodiment provides, the interfere information that the control base station by the base station reception of neighboring cell issues, and, according to described interfere information, control the switch of neighbor cell, can improve the ability of Inter-Cell Interference Coordination.

One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise the flow process as the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.

The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.

Claims

1. the method for an Inter-Cell Interference Coordination, is characterized in that, comprising:

The control base station of the first community obtains the resources occupation rate of the boundary user of described the first community;

The control base station of described the first community sends to the resources occupation rate of the boundary user of described the first community the control base station of the second community; Described the second community is the neighbor cell of described the first community, the almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community;

The control base station of described the first community receives the almost gap frame information of the control base station configuration of described the second community, and described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community;

The control base station of described the first community is according to described almost gap frame information, by the scheduling of the boundary user of described the first community, on the subframe of the descending transmission of described the first community, the time-domain position of described subframe is identical with the time-domain position of the almost gap frame of the descending transmission of described the second community.

2. the method for Inter-Cell Interference Coordination as claimed in claim 1, is characterized in that, the control base station of described the first community obtains the resources occupation rate of the boundary user of described the first community, comprising:

The control base station of described the first community receives the measurement report of the user equipment to report of described the first community, and described measurement report comprises the Reference Signal Received Power RSRP of described the first community ^PReference Signal Received Power RSRP with described the second community ^M

If RSRP ^M-Bias≤RSRP ^P<RSRP ^M, judge that described subscriber equipment is the boundary user of described the first community; If RSRP ^P<RSRP ^M-Bias or RSRP ^P>=RSRP ^M, judge that described subscriber equipment is not the boundary user of described the first community; Wherein, Bias is pre-configured Reference Signal Received Power difference;

The resources occupation rate of the boundary user of described the first community is added up in the control base station of described the first community.

3. the method for Inter-Cell Interference Coordination as claimed in claim 2, is characterized in that, the method for the resources occupation rate of the boundary user of described the first community of described statistics comprises:

By the Resource Block quantity of the boundary user of described the first community, divided by whole Resource Block quantity of described the first community, obtain the resources occupation rate of the boundary user of described the first community; Or

By the Resource Block quantity of the boundary user of described the first community, divided by the Resource Block quantity of the edge band of described the first community, obtain the resources occupation rate of the boundary user of described the first community.

4. as the method for the described Inter-Cell Interference Coordination of claim 1 ~ 3 any one, it is characterized in that, obtain the resources occupation rate of boundary user of the first community in the control base station of described the first community before, also comprise:

While carrying out the cell range expansion in the first community, the control base station of described the first community sends cell range expanded configuration information to the control base station of described the second community; Described cell range expanded configuration information comprises cell range expansion bias, and the time of enabling described cell range expansion bias; Described cell range expanded configuration information is for notifying the control base station change cell range expanded configuration of described the second community;

The control base station of described the first community receives the cell range extended response information that the control base station of described the second community is returned.

5. the method for Inter-Cell Interference Coordination as claimed in claim 1, is characterized in that, the control base station of described the first community sends to the resources occupation rate of the boundary user of described the first community the control base station of the second community, comprising:

The control base station of described the first community, by X2 interface or by S 1 interface or by Operations,Administration And Maintenance center O AM or by the interface between base station and base station telegon, sends to the resources occupation rate of the boundary user of described the first community the control base station of described the second community.

6. a base station, is characterized in that, comprising:

Acquiring unit, for the resources occupation rate of the boundary user that obtains the first community;

Transmitting element, send to the control base station of the second community for the resources occupation rate of the boundary user by described the first community; Described the second community is the neighbor cell of described the first community, the almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community;

Receiving element, the almost gap frame information configured for the control base station that receives described the second community; Described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community; With

Scheduling unit, be used for according to described almost gap frame information, by the scheduling of the boundary user of described the first community, on the subframe of the descending transmission of described the first community, the time-domain position of described subframe is identical with the time-domain position of the almost gap frame of the descending transmission of described the second community.

7. base station as claimed in claim 6, is characterized in that, described acquiring unit specifically comprises:

Receive subelement, for the measurement report of the user equipment to report that receives described the first community, described measurement report comprises the Reference Signal Received Power RSRP of described the first community ^PReference Signal Received Power RSRP with described the second community ^M

Determine subelement, if for RSRP ^M-Bias≤RSRP ^P<RSRP ^M, judge that described subscriber equipment is the boundary user of described the first community; If RSRP ^P<RSRP ^M– Bias or RSRP ^P>=RSRP ^M, judge that described subscriber equipment is not the boundary user of described the first community; Wherein, Bias is pre-configured Reference Signal Received Power difference; With

Process subelement, for the resources occupation rate of the boundary user of adding up described the first community.

8. base station as claimed in claim 7, is characterized in that, described processing subelement is further used for:

By the Resource Block quantity of the boundary user of described the first community, divided by whole Resource Block quantity of described the first community, obtain the resources occupation rate of the boundary user of described the first community; Or, by the Resource Block quantity of the boundary user of described the first community, divided by the Resource Block quantity of the edge band of described the first community, obtain the resources occupation rate of the boundary user of described the first community.

9. base station as described as claim 6 ~ 8 any one, is characterized in that,

Described transmitting element also for: carry out cell range when expansion in described the first community, to the control base station of described the second community, send cell range expanded configuration information; Described cell range expanded configuration information comprises cell range expansion bias, and the time of enabling described cell range expansion bias; Described cell range expanded configuration information is for notifying the control base station change cell range expanded configuration of described the second community;

Described reception subelement also for: receive the cell range extended response information that the control base station of described the second community is returned.

10. a communication system, is characterized in that, comprises the control base station of the first community and the control base station of the second community;

The control base station of described the first community is base station as described as claim 6 ~ 9 any one;

The control base station of described the second community, for the resources occupation rate of the boundary user according to described the first community, the almost gap frame that configurating downlink sends, and send almost gap frame information to the control base station of described the first community.

11. communication system as claimed in claim 10, is characterized in that, the control base station of described the second community comprises:

Comparing unit, compare with the first threshold value, the second threshold value respectively for the resources occupation rate of the boundary user by described the first community; Described the first threshold value is less than described the second threshold value; With

Dispensing unit, if be less than described the first threshold value for the resources occupation rate of the boundary user of described the first community, the almost gap frame of the descending transmission of described the second community reduces N ₁Individual, N ₁>=1; If the resources occupation rate of the boundary user of described the first community is greater than described the second threshold value, the almost gap frame of the descending transmission of described the second community increases N ₂Individual, N ₂>=1; If the resources occupation rate of the boundary user of described the first community is more than or equal to described the first threshold value, and the resources occupation rate of the boundary user of described the first community is less than or equal to described the second threshold value, do not change the quantity of almost gap frame of the descending transmission of described the second community.

12. communication system as described as claim 10 or 11, it is characterized in that, the control base station of described the first community is further used for, pass through X2 interface, perhaps by the S1 interface, perhaps pass through Operations,Administration And Maintenance center O AM, or, by the interface between base station and base station telegon, the resources occupation rate of the boundary user of described the first community is sent to the control base station of described the second community;

The control base station of described the second community is further used for, by X2 interface, or by the S1 interface, or by OAM, or, by the interface between base station and base station telegon, described almost gap frame information is sent to the control base station of described the first community.

13. the method for an Inter-Cell Interference Coordination, is characterized in that, comprising:

The control base station of described the first community sends to the resources occupation rate of the boundary user of described the first community the control base station of the second community; Described the second community is the neighbor cell of described the first community, and the control base station of described the first community and the control base station of described the second community are different base stations, and described the first community and described the second community have same carrier wave; The almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community;

The control base station of described the first community receives the interfere information of the control base station of described the second community; Described interfere information comprises almost gap frame information, and described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community;

The switch of described the first community, according to described interfere information, is controlled in the control base station of described the first community.

14. the method for Inter-Cell Interference Coordination as claimed in claim 13, is characterized in that, the control base station of described the first community obtains the resources occupation rate of the boundary user of described the first community, comprising:

If RSRP ^M-Bias≤RSRP ^P<RSRP ^M, judge that described subscriber equipment is the boundary user of described the first community; If RSRP ^P<RSRP ^M– Bias or RSRP ^P>=RSRP ^M, judge that described subscriber equipment is not the boundary user of described the first community; Wherein, Bias is pre-configured Reference Signal Received Power difference;

15. the method for Inter-Cell Interference Coordination as claimed in claim 14, is characterized in that, the method for resources occupation rate of the boundary user of described the first community is added up in the control base station of described the first community, comprising:

16. the method for Inter-Cell Interference Coordination as claimed in claim 13, is characterized in that, the control base station of described the first community also comprises before obtaining the resources occupation rate of boundary user of described the first community:

When the cell range expansion is carried out in the control base station of described the first community in described the first community, to the control base station transmission cell range expanded configuration information of described the second community; Described cell range expanded configuration information comprises cell range expansion bias, and the time of enabling described cell range expansion bias; Described cell range expanded configuration information is for notifying the control base station change cell range expanded configuration of described the second community;

17. the method as the described Inter-Cell Interference Coordination of claim 13 ~ 16 any one, is characterized in that, the switch of described the first community, according to described interfere information, is controlled in the control base station of described the first community, comprising:

The control base station of described the first community compares described interfere information and preset threshold value, according to comparative result, judges whether to close described the first community;

If need to close described the first community, the subscriber equipment in described the first community is switched to the 3rd community, and closes described the first community;

Close described the first community if do not need, the boundary user of described the first community is switched to described the 3rd community, do not close described the first community;

18. the method for Inter-Cell Interference Coordination as claimed in claim 17, it is characterized in that, described interfere information also comprises at least one in high interference indication HII, overload indication OI, Relative Narrowband TX Power RNTP, block error rate BLER, channel quality indicator (CQI).

19. the method for Inter-Cell Interference Coordination as claimed in claim 13, it is characterized in that, the control base station of described the first community sends to the control base station of the second community to comprise the resources occupation rate of the boundary user of described the first community: X2 interface is passed through in the control base station of described the first community, perhaps by the S1 interface, perhaps by Operations,Administration And Maintenance center O AM, perhaps, by the interface between base station and base station telegon, the resources occupation rate of the boundary user of described the first community is sent to the control base station of described the second community.

20. a base station, is characterized in that, comprising:

Transmitting element, send to the control base station of the second community for the resources occupation rate of the boundary user by described the first community; Described the second community is the neighbor cell of described the first community, and the control base station of described the first community and the control base station of described the second community are different base stations, and described the first community and described the second community have same carrier wave; The almost gap frame that the resources occupation rate of the boundary user of described the first community is sent for configurating downlink by the control base station of described the second community;

Receiving element, for the interfere information of the control base station that receives described the second community, described interfere information comprises almost gap frame information; Described almost gap frame information is used to indicate the time-domain position of almost gap frame of the descending transmission of described the second community; With

Control unit, for according to described interfere information, control the switch of described the first community.

21. base station as claimed in claim 20, is characterized in that, described acquiring unit specifically comprises:

Process subelement, for the resources occupation rate of the boundary user of adding up described the first community, and send to the control base station of described the second community.

22. base station as claimed in claim 21, is characterized in that, described processing subelement is further used for:

23. base station as claimed in claim 20, is characterized in that,

24. base station as described as claim 20 ~ 23 any one, is characterized in that, described control unit comprises:

Judgment sub-unit, for described interfere information and preset threshold value are compared, judge whether to close described the first community according to comparative result; With

Coordinate subelement, if, for closing described the first community, the subscriber equipment in described the first community is switched to the 3rd community, and close described the first community; Close described the first community if do not need, the boundary user of described the first community is switched to described the 3rd community, do not close described the first community;

25. a communication system, is characterized in that, comprises the control base station of the first community and the control base station of the second community;

The control base station of described the first community is base station as described as claim 20 ~ 24 any one;

26. communication system as claimed in claim 25, is characterized in that, the control base station of described the second community comprises:

27. communication system as described as claim 25 or 26, it is characterized in that, the control base station of described the first community is further used for, pass through X2 interface, perhaps by the S1 interface, perhaps pass through Operations,Administration And Maintenance center O AM, or, by the interface between base station and base station telegon, the resources occupation rate of the boundary user of described the first community is sent to the control base station of described the second community;

The control base station of described the second community is further used for, by X2 interface, or by the S1 interface, or by OAM, or, by the interface between base station and base station telegon, described interfere information is sent to the control base station of described the first community.

28. the method for an Inter-Cell Interference Coordination, is characterized in that, comprising:

The control base station of the 3rd community receives the interfere information that the control base station of the second community issues; Described interfere information comprises the resources occupation rate of the control base station of described the second community according to the boundary user of the first community, the quantity of the almost gap frame of the descending transmission of configuration;

The switch of described the 3rd community, according to described interfere information, is controlled in the control base station of described the 3rd community;

29. the method for Inter-Cell Interference Coordination as claimed in claim 28, is characterized in that, the switch of described the 3rd community, according to described interfere information, is controlled in the control base station of described the 3rd community, comprising:

The control base station of described the 3rd community compares described interfere information and preset threshold value, according to comparative result, judges whether to close described the 3rd community;

If need to close described the 3rd community, close described the 3rd community, and open the 4th community;

Close described the 3rd community if do not need, do not close described the 3rd community, and do not open described the 4th community;

Wherein, the control base station of the control base station of described the 3rd community and described the 4th community is identical base station, and described the 3rd community and described the 4th community have different carrier.

30. the method as claim 28 or 29 described Inter-Cell Interference Coordination, it is characterized in that, described interfere information also comprises at least one in high interference indication HII, overload indication OI, Relative Narrowband TX Power RNTP, block error rate BLER, channel quality indicator (CQI).

31. a base station, is characterized in that, comprising:

Receiving element, the interfere information issued for the control base station that receives described the second community; Described interfere information comprises the resources occupation rate of the control base station of described the second community according to the boundary user of the first community, the quantity of the almost gap frame of the descending transmission of configuration; With

Control unit, for according to described interfere information, control the switch of the 3rd community;

32. base station as claimed in claim 31, is characterized in that, described control unit specifically comprises:

Judgment sub-unit, for described interfere information and preset threshold value are compared, judge whether to close described the 3rd community according to comparative result; With

Coordinate subelement, if, for closing described the 3rd community, close described the 3rd community, and open the 4th community; Close described the 3rd community if do not need, do not close described the 3rd community, and do not open described the 4th community;