CN102348216B - A kind of interference processing method and device - Google Patents
A kind of interference processing method and device Download PDFInfo
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Abstract
The embodiment provides one interference processing method and device, relate to communication technical field, is the flexibility improving interference process, promotes the rejection disturbed and invents.The method of described interference process, comprising: from the interference coordination schemes set preset, determine the interference coordination schemes that interference base station adopts, described interference coordination schemes set comprises at least two kinds of interference coordination schemes; According to the interference coordination schemes that described interference base station adopts, carry out the process disturbed.Embodiments of the invention can be used in wireless communication system.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of interference processing method and device.
Background technology
Along with the development of industry and the progress of technology, various types of wireless communication systems is all devoted to elevator system performance, to meet ever-increasing performance requirement.With LTE (Long Term Evolution, LongTermEvolution)/LTE-A (advanced Long Term Evolution, LongTermEvolutionAdvanced) wireless communication system is example, in order to elevator system performance, same standard can be disposed but the base station of dissimilar base station or different systems in the coverage of the homogeneous network (homogeneousnetwork) adopting same standard same type of base station to form, form heterogeneous network (Heterogeneousnetwork).Such as, deploy large transmitting power base station macro base station MeNB (MacroeNodeB) and adopt same standard with MeNB but dissimilar low transmitting power base station LPN (LowerPowerNode) covers with the hot spot region strengthening network, indoor blind spot covers, cell edge covers, and promote the spectrum utilization efficiency etc. of community average throughput, cell edge throughput, community.
In the heterogeneous network of above-mentioned MeNB and LPN composition, in order to improve the spectrum utilization efficiency of system as much as possible, the spectrum reuse that the configurable up and/or down frequency spectrum resources of LPN and the configurable up and/or down frequency spectrum resources of MeNB are carried out wholly or in part can be made.Now, because LPN is configured with identical with MeNB or that part is identical frequency spectrum resource, therefore the channel of user equipment (UE) (UserEquipment) of LPN or LPN service or Signal transmissions, and people having a common goal or co-channel interference will be produced between the channel of the UE of MeNB or MeNB service or Signal transmissions.Interference can affect the reliability of LPN and MeNB downlink channel transmission and up channel detection.Therefore, in heterogeneous network, need between LPN and MeNB to carry out interference coordination, such as resource coordination, comprise the coordination of frequency, time, power, code source, to ensure the reliability of channel between LPN and MeNB and Signal transmissions.
In existing LTE system, the power level information between base station on mutual Physical Resource Block, base station needs when dispatching to consider the power level information on adjacent base station physical Resource Block, thus carries out AF panel and coordination.But this interference processing method means are single, flexibility is poor, and, effectively can not solve the interference coordination problem of control channel between base station and common signal channel, therefore, the coordination carry out interference and rejection ability are limited, can not reach the AF panel performance of optimization, and then have impact on the reliability of channel or Signal transmissions, limit the level of resources utilization of system.
Summary of the invention
The main purpose of embodiments of the invention is, provides a kind of method and apparatus disturbing process, can improve the flexibility of interference process, promotes the rejection to interference.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of interference processing method, comprising:
From the interference coordination schemes set preset, determine the interference coordination schemes that interference base station adopts, described interference coordination schemes set comprises at least two kinds of interference coordination schemes;
According to the interference coordination schemes that described interference base station adopts, carry out the process disturbed.
A kind of interference processing unit, comprising:
Determining unit, for from preset interference coordination schemes set in, determine that interference base station is from adopted interference coordination schemes, described interference coordination schemes set comprises at least two kinds of interference coordination schemes;
Processing unit, according to the interference coordination schemes that described interference base station adopts, carries out the process disturbed.
After adopting technique scheme, the method and apparatus of the interference process that the embodiment of the present invention provides, when carrying out interference process, can according to the load state of system, annoyance level, AF panel requirement, the actual conditions such as the ability of UE, determine interference coordination schemes flexibly, namely best interference coordination schemes can be selected, therefore, can effectively coordinate interference and suppress, improve the performance of AF panel, effectively ensure the reliability of channel and/or Signal transmissions, improve the level of resources utilization of system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the interference processing method of the embodiment of the present invention;
Fig. 2 (a) is for the embodiment of the present invention is based on the schematic flow sheet of the interference processing method of UE;
Fig. 2 (b) for interference coordination mode in the embodiment of the present invention be a kind of principle schematic of configuration MBSFN sub-frame mode;
Fig. 2 (c) for interference coordination mode in the embodiment of the present invention be a kind of principle schematic of configuration AlmostBlank subframe pattern;
A schematic flow sheet of the interference processing method that Fig. 3 provides for the embodiment of the present invention;
Another schematic flow sheet of the interference processing method that Fig. 4 provides for the embodiment of the present invention;
The structured flowchart of the interference processing unit 1 that Fig. 5 provides for the embodiment of the present invention;
The another kind of structured flowchart of the interference processing unit 1 that Fig. 6 provides for the embodiment of the present invention;
The another kind of structured flowchart of the interference processing unit 1 that Fig. 7 provides for the embodiment of the present invention;
The another kind of structured flowchart of the interference processing unit 1 that Fig. 8 provides for the embodiment of the present invention;
The structured flowchart of the interference processing unit 2 that Fig. 9 provides for the embodiment of the present invention;
The structured flowchart of the interference treatment system that Figure 10 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the interference processing method that the embodiment of the present invention provides, based on the interfered base station in communication system, comprises the following steps:
S11, from the interference coordination schemes set preset, determines the interference coordination schemes that described interference base station adopts;
Wherein, the interference coordination schemes set preset comprises at least two kinds of interference coordination schemes.
S12, according to the interference coordination schemes that described interference base station adopts, carries out the process disturbed.
No matter interfered base station or interference base station, when the method for the interference process adopting the embodiment of the present invention to provide carries out interference process, in the interference coordination schemes that namely all can be able to perform from the interference coordination schemes set preset, determine the interference coordination schemes that interference base station adopts flexibly, that is: the best interference coordination schemes of relative actual conditions can be selected, therefore, can effectively coordinate interference and suppress, improve the performance of AF panel, the reliability of effective guarantee transmission, improve the level of resources utilization of system and the overall performance of system.
The interference coordination schemes that interference base station adopts can be directly initiatively that interference base station is determined by interfered base station, now, interfered base station needs to generate corresponding interference coordination information according to the program, and interference coordination information is sent to interference base station, with the interference coordination schemes making interference base station adopt according to interference coordination information determination interference base station.The interference coordination schemes that interference base station adopts also can be that interference base station is initiatively determined voluntarily, then corresponding interference coordination information will be generated according to the program, and interference coordination information is sent to interfered base station, to make interfered base station according to the interference coordination schemes of interference coordination information determination interference base station.That is: no matter the interference coordination schemes that interference base station adopts initiatively is determined by interference base station or is determined by interfered base station active, determine interference coordination schemes that rear interference base station adopts want interfered base station and interfered base station in common knowledge.
Wherein, during the interference coordination schemes that interfered base station or interference base station determination interference base station adopt, all can be dependent on the load state of system, annoyance level, AF panel requirement, or the ability etc. of UE is determined, specifically determine that rule is not limit.Therefore, the disturbance coordination method that the embodiment of the present invention provides, also can comprise before carrying out disturbing process: the scheme presetting the interference coordination schemes that interference coordination schemes set and interference base station adopt determines rule, and wherein, interference coordination schemes set comprises at least two kinds of interference coordination schemes.Like this, during the interference coordination schemes that interfered base station or interference base station determination interference base station adopt, all can be dependent on the load state of system, annoyance level, AF panel require or the actual conditions such as ability of UE and the scheme corresponding to different actual conditions that presets determine rule, with in whole interference coordination schemes that namely can perform in pre-configured interference coordination schemes set, determine the interference coordination schemes that the best interference coordination schemes of actual conditions is adopted for interference base station.Certainly, concrete scheme determination principle is not limit, and can require to arrange according to real system.
Wherein, interference coordination schemes comprises the interference coordination mode that interference base station needs adopt, and has carried out the transmission rule of the employings of other interference base station needs such as the resource of interference coordination and time shift value under can also comprising adopted interference coordination mode.
Interference coordination mode is the major technique adopted that interference base station carries out interference coordination, in a kind of interference coordination schemes, interference coordination mode comprises at least one, such as based on carrier aggregation mode, (shrinking) mode is shunk based on control channel, based on configuration MBSFN sub-frame mode, based on configuration AlmostBlank subframe pattern, based on the displacement mode made between the transmission time of interference base station and the transmission time of interfered base station in life period, or the combination of above-mentioned several mode and other interference coordination mode etc., be not construed as limiting in the embodiment of the present invention.
Carrier aggregation mode refers to that interference base station can use branch's carrier transmission control channel and common signal channel, branch's carrier transmission control channel that interfered base station can use another one different and common signal channel, thus the interference of the control channel avoided between interference base station and interfered base station and common signal channel transmission.
Control channel shrinks mode and refers to that interference base station can at the partial-band transmitted over resources control channel of branch's carrier wave and common signal channel, interfered base station can on other band resource of above-mentioned identical branch's carrier wave transmitting control channel and common signal channel, and interference base station is orthogonal with the resource of interfered base station transmitting control channel and common signal channel, thus the interference of the control channel avoided between interference base station and interfered base station and common signal channel transmission.
MBSFN is called as single frequency network multicast transmission, and be exactly at one time, data carry out synchronous transmission with same frequency in multiple base station.At present in the agreement of LTE to the division of the transmission band of MBSFN, have MBSFN special carrier and MBSFN/unicast (clean culture) mixed carrier.MBSFN special carrier can only be used as MBSFN transmission, and MBSFN/unicast mixed carrier has unicast transmission and MBSFN transmission jointly use.On LTE system regulation MBSFN/unicast mixed carrier, for frequency division multiplexing FDD (FrequencyDivisionDuplexing) system, 10 subframes being numbered 0 to 9 are comprised in each radio frames, in 10 subframes of each radio frames, 0 is removed only with configuration, 4,5, the descending sub frame beyond 9 is as MBSFN sub-frame.For time division multiplexing TDD (TimeDivisionDuplexing) system, each radio frames removes 0,1,5 with configuration only, and the descending sub frame beyond 6 is as MBSFN sub-frame.In each MBSFN sub-frame, a front m orthogonal frequency division multiplex OFDM (OrthogonalFrequencyDivisionMultiplexing) symbol is used to carry out unicast business, and other OFDM symbol in this MBSFN sub-frame except front m orthogonal frequency division multiplex OFDM symbol is used as the transmission of multimedia broadcast multi-broadcasting business MBMS (MultimediaBroadcastMulticastService) business.
In order to the transmission of the down channel and/or signal of protecting interfered base station; wherein down channel comprises down control channel and/or data channel; some descending sub frame of oneself community can be configured to MBSFN sub-frame by interference base station, and does not transmit in the MBMS resource that these are configured to MBSFN sub-frame or low-power transmission data message and pilot signal.In the MBMS resource of MBSFN sub-frame not transmitting data information and pilot signal time, interference may be caused to interfered base station owing to only having the unicast transmission in a front m OFDM symbol in the MBSFN sub-frame of interference base station, therefore, configuration MBSFN sub-frame can reduce the interference to interfered base station.
In order to the transmission of the down channel and/or signal of protecting interfered base station; wherein down channel comprises down control channel and/or data channel; some descending sub frame of oneself community can also be configured to AlmostBlank subframe by interference base station; AlmostBlank subframe refers to the transmission only having public guide frequency in this subframe, or only has the transmission of public guide frequency, the control channel of part or data channel transmission partly.Therefore, if certain descending sub frame is configured to AlmostBlank subframe by interference base station, so interfered base station limited interference of will only bear from interference base station, the i.e. interference of the public guide frequency of interference base station, and/or limited control channel, and/or the interference of limited data channel.Therefore, configuration AlmostBlank subframe can reduce the interference to interfered base station.
In order to protect the Physical Broadcast Channel PBCH (PhysicalBroadcastChannel) of interfered base station, the transmission of the common signal channels such as master sync signal PSS (PrimarySynchronizationSignal) and auxiliary synchronous signals SSS (SecondarySynchronizationSignal) or signal, the PBCH of interference base station can be made, PSS, the transmission time of SSS and the PBCH of interfered base station, PSS, displacement (timeshifting) between the transmission time of SSS in life period, such as by making the frame start position of interference base station and interfered base station keep regular hour skew to realize.By the coordination between displacement and base station, interference base station at the PBCH of interfered base station, the transfer resource of PSS, SSS can not transmit any information, thus the PBCH of protection interfered base station, the transmission reliability of PSS, SSS.
In addition, under the actual conditions such as specific load and disturbance regime and system configuration, the compound mode of above-mentioned several interference coordination mode can reach better interference coordination and inhibition.
Further, the interference processing method that the embodiment of the present invention provides, also can comprise: the interference coordination schemes that described interference base station adopts is informed to the UE in interfered base station, enable the UE in interfered base station carry out interference according to described interference coordination schemes to the interference signal of described interference base station and eliminate.Interfered base station can adopt broadcast or the mode of clean culture the interference coordination schemes that described interference base station adopts to be informed to UE in interfered base station, also by Physical Broadcast Channel, the interference coordination schemes that interference base station adopts is informed to the UE in interfered base station by the mode of Dynamic Broadcast Channel and radio resource control RRC (RadioResourceControl) proprietary signaling, like this, the interference coordination schemes that UE in interfered base station can adopt according to interference base station, further elimination is disturbed to the interference signal of interference base station, ensure the reliability of transmission, and then the overall performance of effective elevator system.
Wherein, the interference coordination schemes that interfered base station adopts according to described interference base station, the process carrying out disturbing specifically can comprise: on the subframe that strongly disturbing for the base station that is interfered in either own cell UE scheduling has been carried out interference coordination at interference base station by interfered base station or running time-frequency resource.
Interference base station is according to the interference coordination schemes determined, the process carrying out disturbing specifically can comprise: interference base station is according to the interference coordination mode of specifying in interference coordination schemes, the interference coordination that carries out resource, such as comprise the coordination of frequency, time, power, code source, or interference base station carries out interference coordination process relative to the time shift value etc. of interfered base station.
As shown in Fig. 2 (a), the interference processing method that the embodiment of the present invention provides, based on the UE under the interfered base station in communication system, comprises the following steps:
S21, knows the interference coordination schemes that interference base station adopts;
S22, according to described interference coordination schemes, carries out interference to the interference signal of described interference base station and eliminates.
The method of the interference process that the embodiment of the present invention provides, the interference coordination schemes that UE can adopt according to interference base station, carries out interference to the interference signal of described interference base station and eliminates, eliminate interference effect as far as possible, ensure the reliability of transmission, and then the overall performance of effective elevator system.
Wherein, UE is by receiving the Physical Broadcast Channel of interfered base station, or Dynamic Broadcast Channel, or the interference coordination information of carrying in the proprietary signaling of radio resource control RRC, knows the interference coordination schemes that interference base station adopts.Described interference coordination schemes see describing above, can repeat no more here.The interference coordination schemes that UE can adopt according to interference base station also in conjunction with oneself resource scheduling information, is carried out interference to the interference signal of interference base station and is eliminated.
It is the schematic diagram of MBSFN sub-frame that Fig. 2 (b) illustrates the interference coordination mode that in a kind of embodiment of the present invention, interference base station adopts.As can be seen from Fig. 2 (b), front m OFDM symbol of MBSFN sub-frame can be used for transmitting pilot tone and Downlink Control Information.Subscriber equipment detects the synchronous and auxiliary synchronous signals of the master of interference base station, and then determine the cell ID Cell-ID of interference base station and the pattern of pilot frequency sequence, and interference elimination is carried out to the pilot signal in m OFDM symbol before the MBSFN sub-frame of the interference base station received, promote the reliability of the detection of subscriber equipment control channel or pilot tone.
Fig. 2 (c) illustrates the schematic diagram that interference coordination mode that interference base station in a kind of embodiment of the present invention adopts is AlmostBlank subframe.As can be seen from Fig. 2 (c), in AlmostBlank subframe, only has pilot signal.Subscriber equipment detects the synchronous and auxiliary synchronous signals of the master of interference base station, and then determine the cell ID Cell-ID of interference base station and the pattern of pilot frequency sequence, and interference elimination is carried out to the pilot signal in the AlmostBlank subframe of the interference base station received, promote the reliability of subscriber equipment control channel, data channel or pilot detection.
It should be noted that interference coordination mode that Fig. 2 (b) or Fig. 2 (c) just adopts interference base station is a kind of special case signal of MBSFN sub-frame or AlmostBlank subframe, the Signal transmissions in MBSFN sub-frame or AlmostBlank subframe is not limited only to the signal of above-mentioned special case.
As shown in Figure 3, below for LTE system, illustrate the interference processing method that the embodiment of the present invention provides, comprising:
S31, interfered base station and interference base station carry out interference coordination, and interfered base station, from the interference coordination schemes set preset, is the interference coordination schemes that interference base station determination interference base station adopts;
In this step, interfered base station and interference base station pass through interference coordination, interfered base station can be dependent on the load state of system neatly, annoyance level, the actual conditions such as the ability of AF panel requirement or UE and the interference coordination schemes corresponding to different actual conditions preset determine rule, in whole interference coordination schemes that namely can perform from the interference coordination schemes set preset, for interference base station determine current practice under best interference coordination schemes, like this, can effectively coordinate interference and suppress, improve the performance of AF panel, the reliability of effective guarantee transmission, improve the level of resources utilization of system.
S32, interfered base station generates the interference coordination information corresponding with the interference coordination schemes determined;
Wherein, include in interference coordination information that interference coordination mode indicates, the instruction of interference coordination pattern and time shift instruction etc.;
Interference coordination mode indicates the interference coordination mode being used to indicate described interference base station and adopting, such as carrier aggregation mode, control channel shrinks (shrinking) mode, configuration MBSFN sub-frame mode, configuration AlmostBlank subframe pattern, time shift mode, or the combination in any mode of aforesaid way and alternate manner etc.
The instruction of interference coordination pattern is used to indicate described interference base station and has carried out the resource of interference coordination; Such as, when option and installment AlmostBlank subframe pattern, the instruction of interference coordination pattern can be used for indicating which sub-frame configuration in each radio frames to be AlmostBlank subframe; When option and installment MBSFN sub-frame mode, the instruction of interference coordination pattern can be used for indicating which sub-frame configuration in each radio frames to be MBSFN sub-frame.
Time shift instruction is used to indicate the time shift value of interference base station relative to interfered base station.Time shift instruction can indicate and move to left or move to right, namely relative to interfered base station, the transmission time of interference base station is advanced or delayed, time shift instruction further indicates relative to interfered base station, the sub-frame level carry digit of the transmission time of interference base station and OFDM symbol level carry digit.
Table one: the format sample of interference coordination information
| Interference coordination information | Content | Bit number |
| First field | Interference coordination mode indicates | One or more |
| Second field | Interference coordination pattern indicates | Multiple |
| 3rd field | Time shift indicates | Multiple |
Table two: the example of the interference coordination mode of the first field instruction of 1 bit
| Bit value | The interference coordination mode that interference base station adopts |
| 0 | Configuration MBSFN sub-frame |
| 1 | Configuration Almost blank subframe |
Concrete, as shown in Table 1, interference coordination information can comprise three fields, wherein, the first field carrying interference coordination mode indicates, and is made up of one or more bits, concrete bit number is determined by the interference coordination mode that can adopt in network system, 1 bit can indicate two kinds of interference coordination modes, and bit value is that 0 instruction adopts a kind of interference coordination mode, and bit value is that 1 instruction adopts another kind of interference coordination mode.When there is K kind interference coordination mode, need ceil (log
2(K)) individual bit indicates the interference coordination mode that interference base station adopts, and wherein function ceil (x) expression rounds up to x.Table two to table four is respectively the concrete example of the interference coordination mode indicated by the first field of different bit number and bit value (i.e. bit status), certainly, the present invention is not limited thereto, the interference coordination mode indicated by each bit value of the first field can be arranged arbitrarily according to actual conditions.It is to be noted, the interference coordination mode existed in the number of the bit value of the first field is more than communication system, remaining bit value can be set as reservation mode, can be used for he with or increase interference coordination mode time use, such as, be labeled as the bit value of reservation in table five.
Table three: another example of the interference coordination mode of the first field instruction of 1 bit
| Bit value | The interference coordination mode that interference base station adopts |
| 0 | Configuration MBSFN sub-frame+time shift |
| 1 | Configuration Almost blank subframe+time shift |
Table four: the example of the interference coordination mode of the first field instruction of 2 bits
| The bit value of 2 bits | The interference coordination mode that interference base station adopts |
| 00 | Configuration MBSFN sub-frame |
| 01 | Configuration Almost blank subframe |
| 10 | Configuration MBSFN sub-frame+time shift |
| 11 | Configuration Almost blank subframe+time shift |
Concrete, as shown in Table 1, interference coordination information can comprise three fields, wherein, the first field carrying interference coordination mode indicates, and is made up of one or more bits, concrete bit number is determined by the interference coordination mode that can adopt in network system, 1 bit can indicate two kinds of interference coordination modes, and bit value is that 0 instruction adopts a kind of interference coordination mode, and bit value is that 1 instruction adopts another kind of interference coordination mode.When there is K kind interference coordination mode, need ceil (log
2(K)) individual bit indicates the interference coordination mode that interference base station adopts, and wherein function ceil (x) expression rounds up to x.Table two to table four is respectively the concrete example of the interference coordination mode indicated by the first field of different bit number and bit value (i.e. bit status), certainly, the present invention is not limited thereto, the interference coordination mode indicated by each bit value of the first field can be arranged arbitrarily according to actual conditions.It is to be noted, the interference coordination mode existed in the number of the bit value of the first field is more than communication system, remaining bit value can be set as reservation mode, can be used for he with or increase interference coordination mode time use, such as, be labeled as the bit value of reservation in table five.
Table five: the example of the interference coordination mode of the first field instruction of 3 bits
| Bit value | The interference coordination mode that interference base station adopts |
| 000 | Carrier aggregation |
| 001 | Configuration MBSFN sub-frame |
| 010 | Configuration Almost blank subframe |
| 011 | Time shift |
| 100 | Configuration MBSFN sub-frame+time shift |
| 101 | Configuration Almost blank subframe+time shift |
| 110 | Control channel shrinks |
| 111 | Retain |
Second field carrying interference coordination pattern instruction of interference coordination information, can be made up of multiple bit.If interference base station have employed the interference coordination mode of AlmostBlank subframe or AlmostBlank subframe+time shift, then the second field can be made up of 10 bits, such as (b0, b1, b2, b3, b4, b5, b6, b7, b8, b9), wherein bi (i=0-9) the bit index be used to indicate in each radio frames of interference base station is whether the subframe of i is configured to AlmostBlank subframe.As bi=0, then represent that index is that the subframe of i is not configured to AlmostBlank subframe; Bi=1, then represent that index is that the subframe of i is configured to AlmostBlank subframe, vice versa.Similar, if interference base station adopts the interference coordination mode of MBSFN sub-frame or MBSFN sub-frame+time shift, then the second field can be made up of 6 bits, such as (b0, b1, b2, b3, b4, b5).The interference coordination pattern instruction of 6 bits can be applied to FDD and TDD system, and for FDD system, whether interfered base station is configured to MBSFN sub-frame to the subframe that the instruction of the interference coordination pattern of 6 bits is used to indicate in each radio frames outside 0,4,5,9 subframes; For TDD system, front 5 bits are used to indicate in each radio frames except 0,2,4,5,9 subframes are outer (for TDD system, subframe 2 always sub-frame of uplink, can not be configured to MBSFN sub-frame) subframe whether interfered base station is configured to MBSFN sub-frame, last 1 bit retains.Certainly, for TDD system, the instruction of interference coordination pattern also can be made up of 5 bits, such as (b0, b1, b2, b3, b4), and be used to indicate except 0,2,4,5 in each radio frames, whether interfered base station is configured to MBSFN sub-frame to the subframe outside 9 subframes.No matter interference coordination pattern indicates employing 6 bit or 5 bits, and the bi bit index that can be configured to MBSFN sub-frame be used to indicate in interference base station radio frames is whether the subframe of i is configured to MBSFN sub-frame.As bi=0, then represent that index is that the i subframe that can be configured to MBSFN sub-frame is not configured to MBSFN sub-frame; Bi=1, then represent that index is that the i subframe that can be configured to MBSFN sub-frame is configured to MBSFN sub-frame, vice versa.
Table six: the format sample of interference coordination information the 3rd field
| 3rd field | Content | Bit number |
| First son field | Move to left the mark that moves to right | 1 |
| Second son field | Subframe displacement instruction | One or more |
| 3rd son field | Symbol displacement instruction | One or more |
3rd field carrying time shift instruction of interference coordination information, be made up of multiple bit, as shown in Table 6,3rd field can be divided into three son fields, and the first son field is made up of 1 bit, indicates relative to interfered base station, the transmission time of interference base station moves to left or moves to right, bit value is 1 can represent and move to left, and bit value is 0 can represent and move to right, and vice versa.Certainly, the 3rd field also can be combined by one or more son fields in three son fields and form.
Second son field of the 3rd field can be made up of one or more bit, indicate relative to interfered base station, the sub-frame level number of shift bits of the transmission time of interference base station, each bit value represents a sub-frame level number of shift bits, such as, second son field is made up of a bit, when bit value is 0, indicates relative to interfered base station, displacement 1 subframe of the transmission time of interference base station, when bit value is 1, indicate relative to interfered base station, displacement 5 subframes of the transmission time of interference base station.
3rd son field of the 3rd field can be made up of one or more bit, indicates relative to interfered base station, on the basis of sub-frame level displacement, and the OFDM symbol level number of shift bits of the transmission time of interference base station.As shown in Table 7, each different bit value, represents different OFDM symbol number of shift bits.
Table seven: the example of the OFDM symbol number of shift bits of the 3rd son field instruction of 2 bits
| Bit value | OFDM symbol carry digit |
| 00 | 0OFDM symbol |
| 01 | 1OFDM symbol |
| 10 | 2OFDM symbol |
| 11 | 3OFDM symbol |
Such as, 3rd field of interference coordination information is 0110, first bit 0 represents that time shift moves to right, and second bit 1 expression is displaced 5 subframes, and the state of the three or four bit is that 10 expressions are displaced again 2 OFDM symbol on the basis that subframe is shifted.
It is to be noted, the order of each field of interference coordination information is not limit, meaning representated by the bit value of each field can be arranged arbitrarily according to actual conditions, no matter adopt the interference coordination information of which kind of form, only need ensure that the rule of UE to interference coordination information under interfered base station, interference base station and interfered base station is known altogether.
S33, interference coordination information is sent to the UE in interference base station and interfered base station by interfered base station;
Like this, enable interference base station according to interference coordination information determination interference coordination schemes, in interfered base station, subscriber equipment can carry out interference elimination according to interference coordination schemes to the interference signal of interference base station.
S34, the strongly disturbing UE of the base station that is interfered in interfered base station, according to the interference coordination schemes of interference base station, dispatches in the subframe or running time-frequency resource of having carried out interference coordination at interference base station by interfered base station.
S35, interference base station receives the interference coordination information that interfered base station sends;
S36, interference base station, according to interference coordination information, determines adopted interference coordination schemes.
Namely interference base station indicates according to the interference coordination mode of interference coordination information, interference coordination pattern indicates and interference base station indicates relative to the time shift of interfered base station, determine the interference coordination mode adopted, the information such as the interference coordination pattern under certain interference coordination mode and time shift value.
S37, interference base station, according to interference coordination schemes, processes interference;
Namely interference base station is according to the interference coordination mode under interference coordination schemes, and the information such as interference coordination pattern and time shift value carry out interference process.
S38, UE receive the interference coordination information that interfered base station sends;
S39, UE according to interference coordination information, and in conjunction with oneself resource scheduling information, carry out interference to the interference signal of interference base station and eliminate.
Wherein, UE carries out disturbing elimination to comprise to the interference signal of interference base station: detect the synchronous and auxiliary synchronous signals of the master of interference base station, and then determine the cell ID Cell-ID of interference base station and the pattern of pilot frequency sequence, thus interference elimination is carried out to the interference that the pilot signal of the interference base station received causes.
As shown in Figure 4, continue to illustrate the interference processing method that the embodiment of the present invention provides below, comprising:
S41, interference base station and interfered base station carry out interference coordination, and interference base station, from the interference coordination schemes set preset, determines the interference coordination schemes that interference base station adopts;
In this step, interference base station and interfered base station pass through interference coordination, interference base station can be dependent on actual conditions neatly and the scheme of different actual conditions of corresponding to that presets determines rule, from the interference coordination schemes set preset, the best interference coordination schemes self adopted under determining current practice, like this, can effectively coordinate interference and suppress, improve the performance of AF panel, the reliability of effective guarantee transmission, improves the level of resources utilization of system.
S42, interference base station generates the interference coordination information corresponding with the interference coordination schemes determined.
Wherein, described interference coordination information comprises interference coordination mode and indicates, and the instruction of interference coordination pattern and interference base station, relative to the time shift instruction etc. of interfered base station, can adopt previously described interference coordination information format, repeat no more here.
S43, interference coordination information is sent to interfered base station by interference base station;
The interference coordination schemes that interfered base station can adopt according to interference coordination information determination interference base station.
S44, interference base station, according to interference coordination schemes, adopts corresponding interference coordination mode, and the information such as interference coordination pattern under corresponding interference coordination mode and time shift value is carried out interference and processed.
S45, interfered base station receives the interference coordination information that interference base station sends;
S46, interfered base station, according to interference coordination information, determines the interference coordination schemes that interference base station adopts;
Namely determine the interference coordination mode that interference base station adopts, namely interference coordination pattern has carried out the resource of interference coordination and the information such as time shift value relative to the transmission time of interfered base station;
S47, the interference coordination schemes that interfered base station adopts according to determined interference base station, the strongly disturbing UE of the base station that is interfered in interfered base station is dispatched in the subframe or running time-frequency resource of having carried out interference coordination at interference base station, and interference coordination information is sent the UE in interfered base station;
Interfered base station is by Physical Broadcast Channel, and interference coordination information is sent to the UE in interfered base station by the mode of Dynamic Broadcast Channel and the proprietary signaling of RRC.
S48, UE receive the interference coordination information that interfered base station sends;
S49, UE according to interference coordination information, and in conjunction with oneself resource scheduling information, carry out interference to the interference signal of interference base station and eliminate.
Wherein, UE carries out disturbing elimination to comprise to the interference signal of interference base station: detect the synchronous and auxiliary synchronous signals of the master of interference base station, and then determine the cell ID Cell-ID of interference base station and the pattern of pilot frequency sequence, thus interference elimination is carried out to the interference that the pilot signal of the interference base station received causes.
It is pointed out that interfered base station and interference base station can be all the node of macro base station, low transmitting power base station LPN or other type in the interference processing method adopting the embodiment of the present invention to provide.In addition, under the prerequisite do not produced ambiguity, the concept of described base station can be equal to community herein.
Accordingly, embodiments of the invention additionally provide a kind of interference processing unit 1, can be used as the interfered base station in communication system or interference base station, as shown in Figure 5, comprising:
Determining unit 10, for from preset interference coordination schemes set in, determine the interference coordination schemes that interference base station adopts, interference coordination schemes set comprises at least two kinds of interference coordination schemes;
Processing unit 11, according to interference coordination schemes, carries out the process disturbed.
The interference processing unit 1 that the embodiment of the present invention provides, when carrying out interference process, can according to load state, the actual conditions such as disturbance regime and AF panel degree, can adopt in the interference coordination schemes set that namely can perform, determine the interference coordination schemes that interference base station adopts flexibly, that is: the best interference coordination schemes of relative actual conditions can be selected, therefore, can effectively coordinate interference and suppress, improve the performance of AF panel, the reliability of effective guarantee transmission, improve the level of resources utilization of system and the overall performance of system.
Wherein, determining unit 10 can specifically for according to load state, annoyance level, AF panel requirement, or the actual conditions such as the ability of subscriber equipment, from the interference coordination schemes set preset, determines the interference coordination schemes that interference base station adopts.Certainly, the interference coordination schemes that determining unit 10 also can adopt according to other actual conditions determination interference base stations, does not limit here.
Further, as shown in Figure 6, interference processing unit 1 also comprises transmitting element 12, interference coordination schemes for being adopted by described interference base station informs to the subscriber equipment of interfered base station service, the subscriber equipment of described interfered base station service can disturb elimination further according to the interference signal of described interference coordination schemes to described interference base station, promotes AF panel performance.
As shown in Figure 7, processing unit 1 is disturbed also can to comprise further:
Generation unit 13, for generating the interference coordination information corresponding with determined interference coordination schemes;
Now, transmitting element 12, also for interference coordination information is sent to other interference coordination devices, to make other interference coordination devices described determine described interference coordination schemes according to described interference coordination information, carries out the process disturbed according to described interference coordination schemes.
Like this, no matter disturb processing unit 1 as interfered base station or interference base station, equal can after the interference coordination schemes initiatively determining interference base station, the program is informed to the interference base station corresponding with it or interfered base station, ensure that determined interference coordination schemes is known altogether by interfered base station and interference base station.
In addition, as shown in Figure 8, processing unit 1 is disturbed also can to comprise further:
Acquiring unit 14, for obtaining interference coordination information, described interference coordination information is that other interference coordination devices produce according to the interference coordination schemes determined from the interference coordination schemes set preset;
Now, determining unit 10, also for according to described interference coordination information, determines the interference coordination schemes that described interference base station adopts.
Like this, no matter disturb processing unit 1 as interfered base station or interference base station, all after the interfered base station corresponding with it or interference base station initiatively determine the interference coordination schemes that interference base station adopts, the program can be known, ensure that interference coordination schemes is known altogether by interfered base station and interference base station.That is: no matter disturb processing unit 1 as interfered base station or interference base station, determining unit 10 is all by the interference coordination schemes of two kinds of mode determination interference base stations, and one, determines the interference coordination schemes of interference base station voluntarily; Its two, obtained by acquiring unit 14, with interfered base station corresponding to interference processing unit 1 or interference coordination information corresponding to the determined interference coordination schemes of interference base station, determine the interference coordination schemes that interference base station adopts.
Wherein, interference coordination schemes comprises the interference coordination mode that interference base station adopts, and has carried out the transmission rule of the employings of other interference base station needs such as the resource of interference coordination and time shift value under also comprising adopted specific interference coordination mode.
Interference coordination mode is the major technique adopted that interference base station carries out interference coordination, an interference coordination schemes, interference coordination mode comprises at least one, such as carrier aggregation mode, control channel shrinks (shrinking) mode, configuration MBSFN sub-frame, configuration AlmostBlank subframe, make the displacement between the transmission time of interference base station and the transmission time of interfered base station in life period, and the combination of above-mentioned several mode and other interference coordination mode etc., be not construed as limiting in the embodiment of the present invention.
The interference coordination information corresponding with interference coordination schemes comprises that interference coordination mode indicates, the instruction of interference coordination pattern and time shift instruction; Wherein: described interference coordination mode indicates the interference coordination mode being used to indicate described interference base station and adopting; Described interference coordination pattern instruction is used to indicate described interference base station and has carried out the resource of interference coordination; Described time shift instruction is used to indicate the time shift value of described interference base station relative to interfered base station.Interference coordination information can adopt previously described structure, repeats no more here.
Accordingly, embodiments of the invention additionally provide a kind of interference processing unit 2, can be used as the UE in communication system, as shown in Figure 9, comprising:
Receiving element 20, for receiving the interference coordination schemes that interference base station adopts;
Interference processing unit 21, for according to described interference coordination schemes, carries out interference to the interference signal of described interference base station and eliminates.
The interference processing unit 2 that the embodiment of the present invention provides, the interference coordination schemes that can adopt according to interference base station, disturbs elimination further to the interference signal of described interference base station, ensures the reliability of transmission, and then the overall performance of effective elevator system.
Wherein, the interference coordination schemes that receiving element 20 receives is interference coordination information corresponding to interference coordination schemes, and described interference coordination information can adopt previously described interference coordination information, repeats no more here.
Wherein, interference processing unit 21 can detect the synchronous and auxiliary synchronous signals of the master of interference base station, and then determine the cell ID Cell-ID of interference base station and the pattern of pilot frequency sequence, thus interference elimination is carried out to the interference that the pilot signal of the interference base station received causes.
Accordingly, the embodiment of the present invention additionally provides a kind of interference treatment system, as shown in Figure 10, comprise interfered base station 4 and interference base station 5, wherein, interfered base station 4 or interference base station 5 are from the interference coordination schemes set preset, and determine the interference coordination schemes that interference base station 5 adopts, described interference coordination schemes set comprises at least two kinds of interference coordination schemes;
Interfered base station and interference base station, according to described interference coordination schemes, carry out the process disturbed.
If the interference coordination schemes that interference base station 5 adopts is determined by interfered base station 4, interfered base station 4 will generate the interference coordination information corresponding with the interference coordination schemes determined, this interference coordination information is sent to interference base station 5, and interference base station 5 can determine the interference coordination schemes adopted according to the interference coordination information received; And, if the interference coordination schemes that interference base station 5 adopts is determined voluntarily by interference base station 5, interference base station 5 will generate the interference coordination information corresponding with the interference coordination schemes determined, this interference coordination information is sent to interfered base station 4, the interference coordination schemes that interfered base station 4 can adopt according to the interference coordination information determination interference base station 5 received.
Wherein, the subscriber equipment of interfered base station 4 also for interference coordination message notice corresponding for described interference coordination schemes is served to interfered base station 4, the subscriber equipment of serving to enable interfered base station 4, according to described interference coordination information, carries out interference to the interference signal of interference base station 5 and eliminates.
The interference treatment system that the embodiment of the present invention provides, interfered base station can carry out interference coordination with interference base station, can according to load state, annoyance level, AF panel requirement, or the actual conditions such as the ability of UE, from the interference coordination schemes set preset, determine the interference coordination schemes that interference base station adopts flexibly, that is: the best interference coordination schemes of relative actual conditions can be selected, therefore, can effectively process interference and suppress, improve the performance of AF panel, the reliability of effective guarantee transmission, improve the level of resources utilization of system and the overall performance of system.
Although it is pointed out that the embodiment of the present invention is set forth for LTE system, the present invention is not limited thereto, the embodiment of the present invention is equally applicable to other wireless communication system.
One of ordinary skill in the art will appreciate that: all or part of flow process realizing said method embodiment can have been come by the hardware that computer program instructions is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (13)
1. disturb a processing method, it is characterized in that, comprising:
From the interference coordination schemes set preset, determine the interference coordination schemes that interference base station adopts, described interference coordination schemes set comprises at least two kinds of interference coordination schemes;
According to the interference coordination schemes that described interference base station adopts, carry out the process disturbed;
Wherein, described interference coordination schemes is determined by described interference base station, or is determined by interfered base station, and described interference coordination schemes is known altogether by described interference base station and described interfered base station;
The interference coordination schemes that described interference base station adopts is informed to the subscriber equipment of interfered base station service, according to described interference coordination schemes, interference is carried out to the interference signal of described interference base station to enable the subscriber equipment of described interfered base station service and eliminate.
2. interference processing method according to claim 1, is characterized in that, the described interference coordination schemes set from presetting, determines that the interference coordination schemes that interference base station adopts comprises:
According to load state, annoyance level, AF panel requirement, or the ability of subscriber equipment, from the interference coordination schemes set preset, determine the interference coordination schemes that interference base station adopts.
3. interference processing method according to claim 1, is characterized in that,
The described interference coordination schemes determining that interference base station adopts comprises:
From the interference coordination schemes set preset, interfered base station determines the interference coordination schemes that described interference base station adopts;
The described interference coordination schemes adopted according to described interference base station, the process carrying out disturbing comprises:
The interference coordination schemes that described interfered base station adopts according to described interference base station, carries out the process disturbed.
4. interference processing method according to claim 3, is characterized in that, comprise further:
Described interfered base station generates the interference coordination information corresponding with described interference coordination schemes;
Described interference coordination information is sent to described interference base station by described interfered base station, to make described interference base station determine described interference coordination schemes according to described interference coordination information, carries out the process disturbed according to described interference coordination schemes.
5. interference processing method according to claim 1, is characterized in that,
The described interference coordination schemes determining that interference base station adopts comprises:
Interfered base station receives the interference coordination information that described interference base station is determined, described interference coordination information is that the described interference coordination schemes that described interference base station is determined from the interference coordination schemes set preset according to this interference base station produces; With
Described interfered base station, according to described interference coordination information, determines described interference coordination schemes;
The described interference coordination schemes adopted according to described interference base station, the process carrying out disturbing comprises:
The interference coordination schemes that described interfered base station adopts according to described interference base station, carries out the process disturbed.
6. interference processing method according to claim 1, is characterized in that,
The described interference coordination schemes determining that interference base station adopts comprises:
From the interference coordination schemes set preset, described interference base station determines adopted interference coordination schemes;
The described interference coordination schemes adopted according to described interference base station, the process carrying out disturbing comprises:
The interference coordination schemes that described interference base station adopts according to described interference base station, carries out the process disturbed.
7. interference processing method according to claim 6, is characterized in that, comprise further:
Described interference base station generates the interference coordination information corresponding with described interference coordination schemes;
Described interference coordination information is sent to interfered base station by described interference base station, to make described interfered base station determine described interference coordination schemes according to described interference coordination information, carries out the process disturbed according to described interference coordination schemes.
8. interference processing method according to claim 1, is characterized in that,
The described interference coordination schemes determining that interference base station adopts comprises:
Described interference base station receives the interference coordination information that interfered base station is determined, described interference coordination information is that the described interference coordination schemes that described interfered base station is determined from the interference coordination schemes set preset according to this interfered base station produces; With
Described interference base station, according to described interference coordination information, determines described interference coordination schemes;
The described interference coordination schemes adopted according to described interference base station, the process carrying out disturbing comprises:
The interference coordination schemes that described interference base station adopts according to described interference base station, carries out the process disturbed.
9. the interference processing method according to any one of claim 4,5,7 or 8, is characterized in that, described interference coordination information comprises that interference coordination mode indicates, the instruction of interference coordination pattern and time shift instruction; Wherein:
Described interference coordination mode indicates the interference coordination mode being used to indicate described interference base station and adopting;
Described interference coordination pattern instruction is used to indicate described interference base station and has carried out the resource of interference coordination;
Described time shift instruction is used to indicate the time shift value of described interference base station relative to interfered base station.
10. an interference processing unit, is characterized in that, comprising:
Determining unit, for from preset interference coordination schemes set in, determine the interference coordination schemes that interference base station adopts, described interference coordination schemes set comprises at least two kinds of interference coordination schemes;
Processing unit, according to the interference coordination schemes that described interference base station adopts, carries out the process disturbed;
Wherein, described interference coordination schemes is determined by described interference base station, or is determined by interfered base station, and described interference coordination schemes is known altogether by described interference base station and described interfered base station;
Transmitting element, interference coordination schemes for being adopted by described interference base station informs to the subscriber equipment of interfered base station service, carries out interference eliminate to enable the subscriber equipment of described interfered base station service according to described interference coordination schemes to the interference signal of described interference base station.
11. interference processing unit according to claim 10, it is characterized in that, described determining unit, specifically for according to load state, annoyance level, AF panel requirement, or the ability of subscriber equipment, from the interference coordination schemes set preset, determine the interference coordination schemes that interference base station adopts.
12. interference processing unit according to claim 10 or 11, it is characterized in that, this device comprises further:
Generation unit, for generating the interference coordination information corresponding with described interference coordination schemes;
Described transmitting element, also for described interference coordination information is sent to other interference coordination devices, to make other interference coordination devices described determine described interference coordination schemes according to described interference coordination information, carry out the process disturbed according to described interference coordination schemes; Wherein, other interference coordination devices described are the interference base station corresponding with described interference processing unit or interfered base station.
13. interference processing unit according to claim 10, it is characterized in that, this device comprises further:
Acquiring unit, for obtaining interference coordination information, described interference coordination information is that other interference coordination devices produce according to the described interference coordination schemes determined from the interference coordination schemes set preset; Wherein, other interference coordination devices described are the interference base station corresponding with described interference processing unit or interfered base station;
Described determining unit, also for according to described interference coordination information, determines the interference coordination schemes that described interference base station adopts.
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| CN103297980B (en) * | 2012-03-01 | 2016-12-14 | 华为技术有限公司 | The method and apparatus of interference coordination |
| CN103327498B (en) * | 2012-03-21 | 2016-08-10 | 华为技术有限公司 | Disturbance coordination method between access point and access point apparatus in communication system |
| JP6297542B2 (en) * | 2012-05-31 | 2018-03-20 | クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ | Interference mitigation in asymmetric LTE deployment |
| WO2013177774A1 (en) * | 2012-05-31 | 2013-12-05 | Qualcomm Incorporated | Enb to enb interference mitigation in asymmetric lte deployment |
| WO2014121432A1 (en) * | 2013-02-05 | 2014-08-14 | 华为技术有限公司 | Signal receiving method, sending method, and device |
| MX350671B (en) * | 2013-04-05 | 2017-09-13 | Huawei Tech Co Ltd | Method for inter-cell interference coordination. |
| CN105324969B (en) * | 2014-06-03 | 2018-06-05 | 华为技术有限公司 | Small-power base station, communication system and information transferring method |
| CN105207755B (en) * | 2014-06-09 | 2019-10-11 | 中国移动通信集团公司 | A kind of air interface synchronization method, base station and system |
| WO2016161600A1 (en) * | 2015-04-09 | 2016-10-13 | 华为技术有限公司 | Parameter information transmission method and device, base station and interfered user equipment |
| CN106209301A (en) * | 2015-04-30 | 2016-12-07 | 电信科学技术研究院 | A kind of interference information indicating method, interference delet method and device |
| CN106487488A (en) * | 2015-08-25 | 2017-03-08 | 电信科学技术研究院 | The sending, receiving method of control signaling, the network equipment and receiving device |
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| US9084119B2 (en) * | 2009-01-07 | 2015-07-14 | Qualcomm Incorporated | Carrier reuse in a multicarrier wireless communication environment |
| CN102065550B (en) * | 2009-11-12 | 2014-09-17 | 电信科学技术研究院 | Method and device for reducing inter-cell interference of orthogonal frequency division multiplexing system and terminal thereof |
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