CN103139917A - Identification method, device and system of user equipment causing uplink interference - Google Patents
Identification method, device and system of user equipment causing uplink interference Download PDFInfo
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- CN103139917A CN103139917A CN2011103868370A CN201110386837A CN103139917A CN 103139917 A CN103139917 A CN 103139917A CN 2011103868370 A CN2011103868370 A CN 2011103868370A CN 201110386837 A CN201110386837 A CN 201110386837A CN 103139917 A CN103139917 A CN 103139917A
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Abstract
The invention discloses an identification method, a device and a system of user equipment causing uplink interference. The identification method of the user equipment causing the uplink interference comprises that a macro base station receives uplink interference degree information reported by a lower power node (LPN), wherein the uplink interference degree information comprises interference degree information of the LPN in each resource unit in a time range; and the macro base station identifies the user equipment which causes the uplink interference to the LPN according to the uplink interference degree information and the user equipment scheduled by the macro base station in each resource unit within the time range. According to the identification method, the device and the system of the user equipment causing the uplink interference, under the condition that a macro neighborhood and a neighborhood covered by the LPN exist at the same time, identification of the user equipment causing the uplink interference of the LNP is achieved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of recognition methods, Apparatus and system that causes the subscriber equipment of uplink interference.
Background technology
Along with the development of mobile communication and information technology, the user is growing to the demand of data business.the mobile communications network of present main flow, no matter be to adopt global system for mobile communications (Global System For Mobile Communication, referred to as GSM)/GPRS (General Packet Radio Service, referred to as GPRS) the 2/2.5th third generation mobile communication network, still adopt universal mobile telecommunications system (Universal Mobile Telecommunications System, referred to as UMTS) the 3rd third generation mobile communication network, all by operator's unified planning, the homogeneous network (Homogeneous Network) of disposing.In a single day homogeneous network disposes, and the network capacity in certain area is just fixing.
In order to satisfy the data traffic requirement of rapid growth, operator need to dispose more website.Yet, on the one hand, dispose and the expense of the grand website of isomorphism that upholds one's heritage higher; On the other hand, even in the basic deploy of legacy network a large amount of new site, its network capacity is also thereupon fixing, can not adapt to the business load in some areas in network and the variation demand of service quality (Quality of Service is referred to as QoS).
The 4th third-generation mobile communication design is at some low power nodes of basic deploy (Lower PowerNode of original homogeneous network, referred to as LPN), comprise the little base station of low-power (Pico eNB), Home eNodeB (H eNB) and via node (Relay) etc.Because the transmitting power of these LPN is lower, therefore with respect to base station (the evolved NodeB of Incumbent unified plan, referred to as eNB) macrocell (Macro Cell) that covers, the residential quarter that these LPN cover can be referred to as Microcell (Micro Cell) or small-cell (Small Cell) or low power nodes residential quarter (LPN Cell).
The deployment of LPN is more flexible.For example, can LPN be deployed in hot spot region (as shown in Figure 1) flexibly according to number of users, thus can effectively increase the hot spot region network capacity, alleviate the load of macrocell in the hot spot region.LPN can also be deployed in cell edge (as shown in Figure 2), thereby can effectively strengthen the covering of cell edge, the QoS of raising Cell Edge User.LPN can also be deployed in indoor (as shown in Figure 3), thus can effectively strengthen indoor covering, improve indoor user QoS, satisfy the high traffic demand of indoor user, alleviate simultaneously the load of macrocell.
Between the base station of heterogeneous network, for example between Macro eNB and Pico eNB, also can dispose and set up X2 interface, the base station can be by the more mutual work that have the information of demand more to coordinate for network of this interface transmission.For example, the resource status of the result that can transmit load information (LOAD INFORMATION) message of carrying load and interference coordination information, reports requested measurement upgrades (RESOURCE STATUS UPDATE) message, etc.
According to and the base station between radio link quality, the residential quarter that subscriber equipment (User Equipment is referred to as UE) access is fit to is to obtain service.Transmission channel between UE and base station can be divided from time domain and two angles of frequency domain: from the angle of time domain, maximum time quantum is that duration is that (each base station is its label (System Frame Number System Frame Number for the radio frames of 10ms, be called for short SFN) to identify), it is divided into the subframe of 10 1ms, and each subframe is divided into again the time slot of 2 0.5ms; From the angle of frequency domain, a unit resource is 180kHz, and it is comprised of 12 sub-carrier waves.Like this, for up, on time domain, unit resource on 1 time slot, frequency domain, can be described as a Physical Resource Block (Physical Resource Block is referred to as PRB), and the base station can be dispatched 1 UE and be sent upward signal on 1 PRB.
Pico eNB be a kind of by operator dispose, with framework and the functionally similar LPN of macro base station (Macro eNB).Than Macro eNB, the transmitting power of Pico eNB is lower, and the signal cover that therefore provides is also smaller; Pico eNB can be deployed in the coverage of Macro eNB or the cell edge of Macro eNB.
When the UE (being called MUE) that service is provided by Macro eNB is positioned near the Pico residential quarter (this MUE is also just distant apart from Macro eNB accordingly), Macro eNB is for receiving smoothly the signal of MUE, and it can be dispatched MUE and send upward signal with larger transmitting power.Thus, can have a kind of interference scene, namely because nearer geographic distance between the larger transmitting power of MUE and MUE and Pico eNB, the upward signal of MUE also can be received by Pico eNB, thereby Pico eNB is caused uplink interference.
Need to prove, the prerequisite that above-mentioned uplink interference produces is that the identical or band segment of the carrier frequency of carrier frequency and the Pico eNB of the Serving cell one of (or Serving cell) of MUE certain Pico residential quarter set up is when identical.But then, because the down transmitting power that Pico eNB is less, MUE can not receive the downstream signal of Pico eNB, just can in reporting, the measurement that is sent to Macro eNB not carry the information of Pico residential quarter accordingly yet, therefore, near Macro eNB and do not know that this MUE is positioned at Pico eNB.If Macro eNB can't determine which is be positioned at the Pico cell edge and can cause to Pico eNB the MUE of uplink interference, even Macro eNB knows that Pico eNB has been subject to uplink interference so, that Macro eNB also can't arrange is suitable, can avoid or reduce Pico eNB is produced the scheduling strategy that disturbs.
Summary of the invention
For in correlation technique under the residential quarter that macrocell and LPN cover coexists situation, identification causes the problem of the subscriber equipment of uplink interference to LPN, the invention provides a kind of recognition methods, Apparatus and system that causes the subscriber equipment of uplink interference, to address the above problem at least.
According to an aspect of the present invention, a kind of recognition methods that causes the subscriber equipment of uplink interference is provided, comprise: macro base station receives the up degree information that is disturbed that low power nodes LPN reports, wherein, the described up degree information that is disturbed comprises: LPN is disturbed degree information on each resource units in the certain hour section; Described macro base station is according to the described up subscriber equipment that degree information and described macro base station were dispatched on described each resource units within the described time period that is disturbed, and identification causes the subscriber equipment of uplink interference to described LPN.
Preferably, report the described up degree information that is disturbed of described LPN to described macro base station, comprising: described LPN is by the described up degree information that is disturbed of the described LPN of load information information reporting.
Preferably, macro base station receives that low power nodes LPN reports up be disturbed degree information before, described method also comprises: described macro base station receives the up degree information that on average is disturbed of frequency domain constituent parts resource in the certain hour section that described LPN reports; In described up be disturbed on average that degree information carries up when on average being disturbed degree and reaching predetermined threshold value, send the resource status request message to described LPN, ask described LPN reporting uplink to be disturbed degree information.
Preferably, macro base station receives the up degree information that is disturbed that low power nodes LPN reports, comprise: described macro base station receives described LPN and is receiving the resource status updating message of returning after described resource status request message, wherein, contain the described up degree information that is disturbed in described resource status updating message.
Preferably, the described up degree information that is disturbed also comprises: the system frame number SFN of the initial radio frames time point of described each resource units of indication; Before identification caused the user equipment (UE) of uplink interference to described LPN, described method also comprised: each resource units corresponding with described each resource units of determining described macro base station according to described SFN.
Preferably, described method also comprises: described macro base station is preserved described macro base station schedule information to the up transmitted signal of subscriber equipment within the described time period.
Preferably, described resource units is 180kHZ on frequency, comprises at least in time 0.5ms.
According to a further aspect in the invention, a kind of recognition device that causes the subscriber equipment of uplink interference is provided, comprise: receiver module, be used for receiving the up degree information that is disturbed that low power nodes LPN reports, wherein, the described up degree information that is disturbed comprises: LPN is disturbed degree information on each resource units in the certain hour section; Identification module is used for according to the described up subscriber equipment that program information and described macro base station were dispatched on described each resource units within the described time period that is disturbed, and identification causes the subscriber equipment of uplink interference to described LPN.
Preferably, described receiver module also is used for receiving the up degree information that on average is disturbed of each unit resource of frequency domain in the certain hour section that described LPN reports; Described device also comprises: sending module, be used in described up be disturbed on average that degree information carries up when on average being disturbed degree and reaching predetermined threshold value, send the resource status request message to described LPN, ask described LPN reporting uplink to be disturbed degree information.
Preferably, described device also comprises: determination module, be used for determining each resource units corresponding with described each resource units of described macro base station according to described SFN described up when being disturbed degree information and comprising the SFN of the initial radio frames time point of indicating described each resource units.
According to another aspect of the invention, a kind of recognition system that causes the subscriber equipment of uplink interference is provided, comprise: low power nodes LPN, be used for reporting the up degree information that is disturbed of described LPN to macro base station with cycle and/or event mode, wherein, the described up degree information that is disturbed comprises: be disturbed degree information in the certain hour section on each resource units; Described macro base station comprises the recognition device of the above-mentioned subscriber equipment that causes uplink interference, is used for receiving the up degree information that is disturbed that low power nodes LPN reports; And according to the described up subscriber equipment that degree information and described macro base station were dispatched on described each resource units within the described time period that is disturbed, identification causes the subscriber equipment of uplink interference to described LPN.
By the present invention, low power nodes (LPN) reports its uplink interference degree information suffered on each resource units to macro base station (Macro eNB), macro base station is determined its MUE that dispatches (being the UE of macro base station scheduling) on the disturbed resource units of LPN, identify the MUE that low power nodes has been caused uplink interference, macro base station can arrange suitable scheduling strategy, thereby avoids causing the MUE of uplink interference to continue low power nodes is produced interference.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the LPN focus covering of correlation technique;
Fig. 2 is the schematic diagram according to the LPN cell edge covering of correlation technique;
Fig. 3 is the schematic diagram according to the indoor covering of LPN of correlation technique;
Fig. 4 is the schematic diagram according to the recognition system of the subscriber equipment that causes uplink interference of the bright embodiment of this law;
Fig. 5 is the structured flowchart according to the recognition device of the subscriber equipment that causes uplink interference of the embodiment of the present invention;
Fig. 6 preferably causes the structured flowchart of recognition device of the subscriber equipment of uplink interference according to the embodiment of the present invention a kind of;
Fig. 7 is the structured flowchart of the recognition device of the subscriber equipment that preferably causes uplink interference of the another kind according to the embodiment of the present invention;
Fig. 8 is the flow chart according to the recognition methods of the subscriber equipment that causes uplink interference of the embodiment of the present invention;
Fig. 9 is the flow chart according to the recognition methods of the subscriber equipment that causes uplink interference of the embodiment of the present invention one;
Figure 10 is the flow chart according to the recognition methods of the subscriber equipment that causes uplink interference of the embodiment of the present invention two.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
Resource units in the embodiment of the present invention is a Resource Block, can refer to a subframe on a PRB or time domain, a unit resource on frequency domain, i.e. the multiple situation such as a pair of PRB.In embodiments of the present invention, resource units comprised frequency domain length and the time length of field a two-dimensional concept, it refers to a unit resource, i.e. 180kHz described in background technology on frequency domain; Can be the time slot of a 0.5ms at least on time domain, resource units is exactly a Physical Resource Block (PRB) in this case, can be also the subframe lengths (comprising 2 PRB) of a 1ms, can also be a plurality of time slots (comprising a plurality of Physical Resource Block).
According to the embodiment of the present invention, a kind of recognition system that causes the subscriber equipment of uplink interference is provided, being used in residential quarter that macrocell and LPN cover coexists in situation, identification causes the subscriber equipment of uplink interference to LPN (for example little base station of low-power, Home eNodeB, and via node etc.).
Fig. 4 is the schematic diagram according to the recognition system of the subscriber equipment that causes uplink interference of the embodiment of the present invention, and as shown in Figure 4, this system comprises: low power nodes (LPN) 1 and macro base station (Macro eNB) 2.Wherein, low power nodes (LPN) 1, be used for to the up degree information that is disturbed that reports LPN each resource units in the certain hour section with cycle and/or event mode, wherein, the above-mentioned up degree information that is disturbed comprises: be disturbed degree information in the certain hour section on each resource units; Macro base station 2 is used for receiving the up degree information that is disturbed that low power nodes 1 reports; And, being disturbed according to up the subscriber equipment that degree information and macro base station 2 are dispatched in above-mentioned certain hour section on each resource units, identification causes the user terminal of uplink interference to low power nodes 1.
Under the residential quarter that macrocell and LPN cover coexists situation, can cause uplink interference to LPN when providing the subscriber equipment (MUE) of service to be positioned near the residential quarter that LPN covers by macrocell.Macro base station 2 can be adjusted the MUE that low power nodes 1 is caused uplink interference, avoids or reduces MUE to the uplink interference of low power nodes 1.For this reason, low power nodes 1 can report to macro base station 2 the up degree information that on average is disturbed of each resource units in the certain hour section, receive by macro base station 2 the up degree information that is disturbed that low power nodes 1 reports, macro base station 2 receive up be disturbed degree information after, be disturbed according to up the subscriber equipment that degree information and macro base station 2 are dispatched in above-mentioned certain hour section on each resource units, identification causes the subscriber equipment (MUE) of uplink interference to low power nodes 1.Thereby, by macro base station 2, suitable scheduling strategy is set, to reduce or to avoid uplink interference to low power nodes 1.
In actual applications, low power nodes 1 can with cycle and/or event mode, report the up degree information that on average is disturbed of each resource units within a certain period of time to macro base station 2.For example, low power nodes 1 identifies according to the signal that receives annoyance level and the record that is subject on each resource units, and by the interface between macro base station 2 and low power nodes 1, send load information (Load Information) message to macro base station 2, the uplink interference overload indication (UL Interference Overload Indication) in this message or other parameters can be carried the degree information of suffered uplink interference on interior each resource units of certain hour section.
Perhaps, low power nodes 1 can be with cycle and/or event mode, report the up degree information that on average is disturbed of each unit resource of frequency domain in the certain hour section to macro base station 2, need to prove, in embodiments of the present invention, the unit resource of frequency domain is the one dimension length that communication standard is used to represent frequency domain.In up be disturbed on average that degree information carries up when on average being disturbed degree and reaching predetermined threshold value, macro base station 2 sends the resource status request message to low power nodes 1, request low power nodes 1 reporting uplink is disturbed degree information, after low power nodes 1 receives the resource status request message, send the resource status updating message to macro base station 2, report the up degree information that on average is disturbed of each resource units in the certain hour section.for example, macro base station 2 is by the interface between itself and low power nodes 1, receive on average the be disturbed degree of each frequency-domain segment of respectively serving carrier wave (frequency domain unit resource) within a period of time that low power nodes 1 provides, if the uplink interference that low power nodes 1 is subject on certain carrier frequency is comparatively serious, macro base station 2 is by reporting resource state initialize routine (Resource Status Reporting Initiation) so, request low power nodes 1 is measured, report the degree that is disturbed on concrete resource units within a period of time, low power nodes 1 is carried out the measurement processing after receiving request message, and result is carried in RESOURCE STATUS UPDATE message sends to macro base station 2.
The up degree information that on average is disturbed of each resource units in the certain hour section that macro base station 2 receives that low power nodes 1 reports, and being disturbed according to up the subscriber equipment that degree information and macro base station 2 are dispatched in above-mentioned certain hour section on each resource units, identification causes the user terminal of uplink interference to low power nodes 1.For example, low power nodes 1 with it on concrete each resource units within a period of time the information of suffered annoyance level notify to macro base station 2, because macro base station 2 corresponding these sections of preservation have been dispatched respectively the schedule information of which MUE on each PRB in the period, the resource units that thereby low power nodes 1 can be disturbed mates with the MUE information of dispatching on this resource units, identify the MUE that low power nodes 1 is caused uplink interference, so make suitable, can avoid or reduce the scheduling strategy that low power nodes 1 is caused uplink interference.
Pass through the embodiment of the present invention, low power nodes is periodic or when certain event occurs, report uplink interference degree information suffered on its each resource units to macro base station, macro base station is determined the MUE that it is dispatched on disturbed resource units, identify the MUE that low power nodes has been caused uplink interference, thereby suitable scheduling strategy can be set, to avoid the causing MUE of uplink interference to continue low power nodes is produced interference.
According to the embodiment of the present invention, a kind of recognition device that causes the subscriber equipment of uplink interference also is provided, can but be not limited to be arranged in macro base station 2, with identification, LPN is caused the subscriber equipment of uplink interference.
Fig. 5 is the structured flowchart according to the recognition device of the subscriber equipment that causes uplink interference of the embodiment of the present invention, and as shown in Figure 5, this device comprises: receiver module 502 and identification module 504.Wherein, receiver module 502 be used for to receive the up degree information that is disturbed that low power nodes 1 reports, and wherein, this up degree information that is disturbed can comprise: be disturbed degree information in the certain hour section on each resource units; Identification module 504, be coupled with receiver module 502, be used for uply being disturbed the subscriber equipment that program information and macro base station 2 are dispatched in above-mentioned certain hour section on above-mentioned each resource units according to what receive, identification causes the user terminal UE of uplink interference to low power nodes 1.
In embodiments of the present invention, low power nodes 1 can report to macro base station 2 the up degree information that on average is disturbed of each unit resource of frequency domain in the certain hour section, receiver module 502 can receive the up degree information that is disturbed that low power nodes 1 reports, up be disturbed the subscriber equipment that program information and macro base station 2 are dispatched by identification module 504 in above-mentioned Preset Time section on above-mentioned each resource units according to what receive, identification causes the user terminal UE of uplink interference to low power nodes 1.For example, low power nodes 1 identifies according to the signal that receives annoyance level and the record that is subject on each resource units, and by the interface between macro base station 2 and low power nodes 1, send load information (Load Information) message to macro base station 2, the uplink interference overload indication (UL Interference Overload Indication) in this message or other parameters can be carried the degree information of suffered uplink interference on interior each resource units of certain hour section.
Perhaps, low power nodes 1 also can with cycle and/or event mode, report the up degree information that on average is disturbed of each unit resource of frequency domain in the certain hour section to macro base station 2.In up be disturbed on average that degree information carries up when on average being disturbed degree and reaching predetermined threshold value, macro base station 2 request low power nodes 1 reporting uplinks are disturbed degree information, after low power nodes 1 receives the resource status request message, report the up degree information that is disturbed of each resource units within a predetermined period of time to macro base station 2.Therefore, in a preferred implementation of the embodiment of the present invention, the receiver module 502 in said apparatus, the up degree information that on average is disturbed of each unit resource in the certain hour section that can also be used for receive that low power nodes 1 reports.As shown in Figure 6, said apparatus can also comprise: sending module 506, be coupled with receiver module 502, be used for up be disturbed on average that degree information carries up when on average being disturbed degree and reaching predetermined threshold value that receiving, send the resource status request message to low power nodes 1, ask its reporting uplink to be disturbed degree information.
In actual applications, be not can receive upward signal in base station on each PRB: on each section frequency domain unit resource, at first according to sub-frame configuration, for example, the subframe that in the radio frames of a 10ms, some subframes are sub-frame of uplink, have is descending sub frame; Secondly base station only can dispatch the UE of demand at certain PRB of sub-frame of uplink (on a certain frequency domain unit resource, a sub-frame of uplink comprises 2 PRB, namely can dispatch at most 2 UE and send upward signal) the transmission upward signal, and according to dispatching algorithm, schedulable UE quantity is also limited within a period of time, and the PRB that namely has in sub-frame of uplink is for empty.
And different base station is indicated the time with SFN indication radio frames separately.Adjacent base station may time synchronized, also possibility asynchronism(-nization) step.Operation and maintenance (Operation and Maintenance is called for short OAM) system, the SFN that knows each base station specifically arranges, and then can notify the SFN settings of the adjacent base station of each base station.Thus, the base station radio frames reality of SFN indication corresponding self radio frames in time on adjacent base station as can be known.Because it is different SFN that macro base station 2 and low power nodes 1 may mark same time point (radio frames), and the uncertainty of message transmission time delay, low power nodes 1 is concrete resource units relevant information within transmission a period of time, or during the resource units relevant information of macro base station 2 request low power nodes 1 in certain period of measuring, the SFN that should also need additional this section period start time point (radio frames), and first resource units should be also the first subframe (#0) in this radio frames in time.
Therefore, in a preferred implementation of the embodiment of the present invention, as shown in Figure 7, said apparatus can also comprise: determination module 508, be used for up determining each resource units corresponding with each resource units of macro base station according to SFN when being disturbed degree information and comprising the SFN of the initial radio frames time point of indicating each resource units.After determination module 508 is determined each resource units corresponding with each resource units of macro base station, identification module 504 can uply be disturbed the subscriber equipment that program information and macro base station 2 are dispatched according to what receive on each resource units in the certain hour section, identification causes the user terminal UE of uplink interference to low power nodes 1.
Pass through the embodiment of the present invention, low power nodes reports its uplink interference degree information suffered on each resource units to macro base station, macro base station is determined the MUE that it is dispatched on disturbed resource units, identify the MUE that low power nodes has been caused uplink interference, macro base station can arrange suitable scheduling strategy, thereby avoids causing the MUE of uplink interference to continue low power nodes is produced interference.
According to the embodiment of the present invention, a kind of recognition methods that causes the subscriber equipment of uplink interference also is provided, can but be not limited in system that the above embodiment of the present invention provides or device, identification causes the subscriber equipment of uplink interference to low power nodes.
Fig. 8 is the flow chart according to the recognition methods of the subscriber equipment that causes uplink interference of the embodiment of the present invention, and as shown in Figure 8, the method comprises following step (step S802-step S804):
Step S802, macro base station receive the up degree information that is disturbed that low power nodes LPN reports, and wherein, the up degree information that is disturbed comprises: LPN is disturbed degree information on each resource units in the certain hour section.
Under the residential quarter that macrocell and LPN cover coexists situation, if macro base station can't determine to be positioned at the LPN cell edge, and can cause the subscriber equipment of uplink interference (to provide service by macro base station to LPN, be called MUE), even macro base station knows that LPN has been subject to uplink interference so, also can't arrange suitable, can avoid or reduce PLN is produced the scheduling strategy that disturbs.Therefore, LPN can notify the information of suffered annoyance level on concrete each resource units within a period of time to macro base station; Macro base station is preserved the information of the MUE that dispatches respectively on each PRB in corresponding this section period, the resource units that thereby LPN can be disturbed mates with the information of the MUE that dispatches on this resource units, identify the MUE that LPN is caused uplink interference, so make suitable, can avoid or reduce the scheduling strategy that LPN is caused uplink interference.
For this reason, LPN can identify the annoyance level information that is subject to by the signal received according to its receiver on each resource units, preferably, can record and be disturbed degree information.Then by the interface between LPN and macro base station (for example, X2 interface), send Load Information message to macro base station, the uplink interference overload indication (UL Interference Overload Indication) in message or other parameters can be carried in a period of time, suffered uplink interference degree on each resource units; Macro base station is preserved interior resource location schedule information to its MUE that serves of this section period, the MUE that namely dispatches respectively on each PRB.
In a preferred implementation of the embodiment of the present invention, LPN can report the up degree information that is disturbed of this LPN with cycle and/or event mode to macro base station.For example, be subject to triggering LPN and reporting the up degree information that is disturbed of this LPN to macro base station when comparatively serious than strong jamming or load at LPN.In the situation that LPN initiatively reports the up degree information that is disturbed of this LPN to macro base station, if the interface of LPN and macro base station is X2 interface, LPN can report by load information message (Load Information) the up degree information that is disturbed of this LPN.It will be appreciated by those skilled in the art that, transmitting above-mentioned information can be also other existing X2 chain of command message or newly-increased message.
For example, when setting cycle arrives, LPN sends X2 message to macro base station: Load Information, LPN can be by up the be disturbed degree information of the notice of the parameter UL Interference Overload Indication in this message macro base station LPN on concrete resource units.According to actual conditions, the different degree that is disturbed can be set, for example, the degree of being disturbed can be divided into: severe jamming (high interference), intermediate disturbance (medium interference) and slight (low interference) the several grades of disturbing, and then macro base station determines whether to take corresponding measure to reduce uplink interference according to the grade that is disturbed degree.
In actual applications, low power nodes also can report to macro base station the up degree information that on average is disturbed of each unit resource of frequency domain in the certain hour section.In up be disturbed on average that degree information carries up when on average being disturbed degree and reaching predetermined threshold value, macro base station sends the resource status request message to low power nodes, request low power nodes reporting uplink is disturbed degree information, after low power nodes receives the resource status request message, send the resource status updating message to macro base station, report the up degree information that on average is disturbed of each resource units in the certain hour section.
for example, macro base station is by the reception of interface message (for example X2 information), know on average the be disturbed degree of each frequency-domain segment of respectively serving carrier wave (frequency domain unit resource) within a period of time that LPN provides, if the uplink interference that LPN is subject on certain carrier frequency is comparatively serious, macro base station is by resource status information reporting initialize routine (Resource Status Reporting Initiation) so, request LPN measurement reports the degree that is disturbed on concrete resource units within a period of time, macro base station is corresponding to be preserved asking this section that the LPN measurement reports in the period, MUE to be sent the resource location schedule information of upward signal, LPN receives and carries out requested measurement after interface message, and result is carried in RESOURCE STATUS UPDATE message sends to macro base station.
In a preferred implementation of the embodiment of the present invention, to achieve these goals, macro base station receives that low power nodes LPN reports up be disturbed degree information before, the method for the embodiment of the present invention also comprises: macro base station receives the up degree information that on average is disturbed of each unit resource of frequency domain in the certain hour section that LPN reports; In up be disturbed on average that degree information carries up when on average being disturbed degree and reaching predetermined threshold value, send resource status request (RESOURCE STATUS REQUEST) message to LPN, request LPN reporting uplink is disturbed degree information.By the embodiment of the present invention, LPN reporting uplink flexibly is disturbed degree information.Wherein, LPN can report in the mode of cycle and/or event the up degree information that is disturbed of each resource units in the time period that macro base station asked to macro base station.Wherein, if report in the resource status request message RQ cycle, LPN is after receiving the resource status request message, the cycle of asking according to the resource status request message, the periodic measurement, and periodically reply the resource status updating message to macro base station, reporting uplink is disturbed degree information; Periodically do not report if require in the resource status request message, LPN can be after receiving the resource status request message, after completing measurement, reply first resource state updating message to macro base station, reporting uplink is disturbed degree information (being measurement result).
According to actual conditions, LPN report its be disturbed degree information on each resource units, can comprise the up degree information that is disturbed of all resource units within a certain period of time, also can only comprise the up up degree information that is disturbed that degree reaches the resource units of predetermined threshold value that is disturbed.In the situation that report the up degree information that is disturbed of all resource units, can be by macro base station according to the threshold value that sets in advance, resource units up is disturbed the resource units that degree reaches threshold value identifies; In the situation that only comprise the up resource units that degree reaches predetermined threshold value that is disturbed, LPN can first judge before reporting, thereby only reporting uplink is disturbed the resource units that degree reaches predetermined threshold value.
Step S804, macro base station is disturbed according to up the subscriber equipment that degree information and this macro base station are dispatched on each resource units within the above-mentioned time period, and identification causes the subscriber equipment of uplink interference to above-mentioned LPN.
In actual applications, different base station is indicated the time with SFN indication radio frames separately, it is different SFN that macro base station and low power nodes may mark same time point (radio frames), and the uncertainty of message transmission time delay, low power nodes is concrete resource units relevant information within transmission a period of time, or during the resource units relevant information of macro base station request low power nodes in certain period of measuring, should also need the SFN of additional this section period start time point (radio frames).Therefore, in a preferred implementation of the embodiment of the present invention, macro base station identification also comprises: each resource units corresponding with each resource units of determining macro base station according to SFN before LPN is caused the user equipment (UE) of uplink interference.By this preferred implementation, improved reliability and the accuracy of identification.
receive that LPN reports up be disturbed degree information after, known that LPN has been subject to the resource units of the uplink interference of middle intensity, and macro base station was preserved in the corresponding time period, the MUE that dispatches respectively on each PRB sends the resource location information of upward signal, be that macro base station is preserved macro base station schedule information to the up transmitted signal of UE within the corresponding time period, and then corresponding by the coupling of these two information, macro base station can identify the MUE that LPN has been caused the above uplink interference of predetermined threshold value, thereby it is suitable to set out, can avoid or reduce the scheduling strategy that Pico eNB is caused interference.
In actual applications, macro base station sends upward signal and record in addition with the granularity of PRB scheduling MUE, if it is 0.5ms (being also namely the granularity of PRB) that LPN records the time domain of the resource units of annoyance level, after macro base station is received and is disturbed degree information, can mate the most accurately, identify interference source MUE; If the time length of field of described resource units is 1ms, namely the annoyance level information that records of LPN is the mean value that is interfered on 2 PRB, may comprise when Macro eNB mates so LPN not to be caused the MUE of uplink interference.In a word, the granularity that LPN keeps a record thinner (corresponding amount of information is also just larger), macro base station receives that the matching result that can draw after message is also just more accurate.
Pass through the embodiment of the present invention, low power nodes reports its uplink interference degree information suffered on each resource units to macro base station, macro base station is determined the subscriber equipment that it is dispatched on disturbed resource units, identify the subscriber equipment that low power nodes has been caused uplink interference.
Be described below by specific embodiment.
Embodiment one
According to the embodiment of the present invention, specifically described, in the situation that the little base station of low-power (Pico eNB) coexists with macro base station (Macro eNB), when being provided the subscriber equipment of service to cause uplink interference to Pico eNB by macro base station, Pico eNB is disturbed degree information on each resource units by Load Information message informing Macro eNB in a period of time, that Macro eNB preserves itself and self, during this period of time the MUE PRB position schedule information that sends upward signal is mated, thereby identify the MUE that Pico eNB is caused interference.
Fig. 9 is the flow chart according to the recognition methods of the subscriber equipment that causes uplink interference of the embodiment of the present invention one, and as shown in Figure 9, the method comprises following step (step S902-step S904):
Step S902: low power nodes Pico eNB can be deployed in the coverage of Macro eNB or its cell edge; When MUE is positioned near the Pico residential quarter (this MUE is also just distant apart from Macro eNB accordingly), Macro eNB is for receiving smoothly the signal of MUE, and it can be dispatched MUE and send upward signal with larger transmitting power.If the carrier frequency of the Serving cell of this MUE one of (or Serving cell) is identical with the carrier frequency of certain Pico residential quarter, up the transmitting of this MUE caused uplink interference to Pico eNB possibly so.Pico eNB periodically or Event triggered (being subject to than strong jamming or load when comparatively serious as eNB) send X2 message to Macro eNB: Load Information, Pico eNB can notify its up degree information (as: severe jamming high interference that is disturbed on concrete resource units to Macro eNB by the parameter UL Interference Overload Indication in this message, intermediate disturbance medium interference slightly disturbs low interference).
By way of example, the up scheme that is disturbed degree information in a kind of possible transfer resource unit is to identify with two-dimensional matrix bitmap (Bitmap).For example: with horizontal expression slot time, with vertical expression frequency domain unit (being 180KHz), the position of each matrix element namely represents time quantum and the frequency values that resource units (PRB) is actual, and the suffered uplink interference degree of this resource units of the value representation of each matrix element.As previously mentioned, do not send upward signal because some resource units are dispatched UE, eNB namely can not attempt to receive first-class the waiting of this resource units yet, and this matrix element value can be 0 so; The degree information sign perhaps also can be arranged, although be that Pico eNB can not receive the upward signal that PUE sends on this PRB, but may receive the signal that MUE sends, and this signal is pure interference to Pico eNB, fills in the annoyance level message identification and can may provide for the MUE of interference source more information for Macro eNB identification in this matrix element.
If Load Information message is periodically to send (normally 20ms or longer), disturbed Pico eNB sets up Pico residential quarter occupies 50 frequency domain unit resource on frequency domain (that be subject to uplink interference is Pico eNB, and this can receive the upward signal that MUE sends when referring to the upward signal that PUE that Pico eNB attempts to receive the Pico residential quarter service of being set up by self sends simultaneously; And because the Macro residential quarter at interference source MUE place is identical with Pico cell carrier frequency, therefore Pico eNB is difficult to distinguish this two upward signals), this Bitmap is namely the two-dimensional matrix of 50 row * 40 row so, the position of each matrix element is the Time And Frequency of this PRB reality, when each matrix element value receives signal according to Pico eNB on each PRB suffered disturbed degree record the actual high of being filled into interference (H) or medium interference (M) or low interference (L), as shown in table 1.(any that need to illustrate as mentioned above, sends upward signal if certain PRB is configured to send downstream signal or does not dispatch any institute service UE, and the value of this matrix element can be 0).
Table 1:
If being the event triggering, Load Information message (namely have demand just to send, decided in its sole discretion by transmit leg Pico eNB), that is to say, the time span that in the time of its transmission message and message, carry information represents is indefinite, the design principle of so above-mentioned matrix is constant, just time quantum is indefinite, and namely the columns of two-dimensional matrix bitmap equals the number of time slots of actual expression in message.
Further, Macro eNB need to preserve in this section period and self dispatch the resource location information that MUE sends upward signal, has namely dispatched which MUE and send upward signal on which PRB.For periodically sending the scheme of Load Information message, Macro eNB only need to preserve the schedule information in the corresponding cycle of the preceding paragraph (as 20ms or longer); And concerning the scheme of Event triggered transmission Load Information message, Macro eNB need to preserve the schedule information in the Load Information message interval time twice, and namely Macro eNB preserves the resource location information that scheduling MUE sends upward signal always before receiving new Load Information message.
what need in addition to illustrate is a bit, because Macro eNB and Pico eNB to the SFN settings of indication real time may be different (as to same time point, Macro eNB arranges and is numbered SFN=0001, Pico eNB arranges and is numbered SFN=1000), add the propagation delay time of X2 message, therefore when Macro eNB receives Load Information message and knows the above-mentioned two-dimensional matrix that it carries, also need indicate first matrix element of first trip in message and indicate on earth the subframe of which real time point, this SFN that just needs to carry in message the radio frames at first subframe of first trip place indicates (the first subframe #0 that this subframe should be also this radio frames), and before this, OAM should notify eNB SFN that its adjacent eNB configures actual indication the radio frames time value (be OAM can with the radio frames of SFN=1000 in Pico eNB corresponding be exactly this information notice of the radio frames Macro eNB of SFN=0001 in Macro eNB, for example can notify the difference of this SFN configuration).
Step S904:Macro eNB receive know after Load Information message in the 20ms (or longer a period of time) that the radio frames start time point with the SFN indication of carrying in message begins, on the carrier wave of the current use of Pico eNB, the up degree that is disturbed of each resource units; Simultaneously, information storage based on self, that MUE that dispatched on the time period of correspondence and each resource units on frequency band sends upward signal, Macro eNB can mate and identifies the MUE that has disturbed Pico eNB to receive.Continue Pico eNB is produced uplink interference for fear of these MUE, that Macro eNB arranges is suitable, can avoid or reduce Pico eNB is produced the scheduling strategy that disturbs, as reshuffles the Serving cell etc. of MUE.
Pass through the embodiment of the present invention, disturbed Pico eNB notifies uplink interference degree information suffered on each resource units to Macro eNB, Macro eNB identifies by having dispatched which MUE on the resource units of determining intensity interference in quilt the MUE that PicoeNB has been caused uplink interference, disturbs to avoid these interference sources UE to continue Pico eNB is produced thereby suitable scheduling strategy is set.
Embodiment two
According to the embodiment of the present invention, Pico eNB notifies up on average the be disturbed degree information of each frequency domain unit resource within a period of time by existing X2 message to Macro eNB, Macro eNB knows that Pico eNB is subject to middle intensity and disturbs on some frequency band after receiving message, and Macro eNB further reports the situation that is disturbed on concrete resource units in a period of time by Resource Status Reporting Initiation PROGRAMMED REQUESTS Pico eNB; Macro eNB can preserve the PRB positional information of the MUE transmission upward signal of dispatching office service in this section period accordingly.Pico eNB receives and carries out corresponding the measurement after request message, and result is carried in RESOURCE STATUS UPDATE message reports Macro eNB.
The information that Macro eNB will obtain in RESOURCE STATUS UPDATE message and the resource units positional information of self preserving, during this period of time dispatch MUE transmission upward signal are mated, thereby identify the MUE that Pico eNB is caused interference, can make thus suitable, can avoid or reduce Pico eNB is produced the scheduling strategy that disturbs.
Figure 10 is the flow chart according to the recognition methods of the subscriber equipment that causes uplink interference of the embodiment of the present invention two, and as shown in figure 10, the method comprises following step (step S1002-step S1008):
Step S1002: low power nodes Pico eNB can be deployed in the coverage of Macro eNB or its cell edge; When MUE is positioned near the Pico residential quarter (this MUE is also just distant apart from Macro eNB accordingly), Macro eNB is for receiving smoothly the signal of MUE, and it can be dispatched MUE and send upward signal with larger transmitting power.If the carrier frequency of the Serving cell of this MUE one of (or Serving cell) is identical with the carrier frequency of certain Pico residential quarter, up the transmitting of this MUE caused uplink interference to Pico eNB possibly so.Pico eNB can send the up average disturbed degree of existing X2 message to indicate every frequency domain unit resource to be subject to Macro eNB within a period of time.
Step S1004:Macro eNB receive know after above-mentioned message Pico eNB may be subject in, the interference of intensity, Macro eNB can utilize Resource Status Reporting Initiation program.That is to say, Macro eNB sends resource status request (RESOURCE STATUS REQUEST) message by X2 interface to Pico eNB, request Pico eNB reports a period of time (indicated time in the X2 message in can step 501, it can be also other sections period, receive a period of time of measuring statistics after request message etc. as Pico eNB, in a word, the time span that should indicate Pico eNB to measure in this request message also may also comprise the SFN of initial radio frames time point) in the uplink interference degree that is subject on concrete each resource units.Accordingly, Macro eNB sends this request message, self can preserve the interior PRB positional information that the MUE scheduling of service is sent upward signal of time period of message indicating.If Pico eNB can carry out this measurement statistics after receiving message, namely reply resource status response (RESOURCE STATUS RESPONSE) message.
Step S1006: according to the measurement timing statistics length of RESOURCE STATUS REQUEST message indicating and the information such as start time point that may also comprise, Pico eNB by RESOURCE STATUS UPDATE information reporting during this period of time in uplink interference degree information on the per unit resource.Transmission plan can be similar with given example in embodiment one, step 401, if just reported result based on time be Macro eNB appointment, can no longer add SFN so, as described in step 502.Note, RESOURCE STATUS UPDATE message may be to continue periodically to send.
Step S1008:Macro eNB receive know after RESOURCE STATUS UPDATE message in the time period of asking, the up degree that is disturbed of each resource units on the carrier wave of the current use of Pico eNB; Simultaneously, the PRB positional information of, MUE send upward signal that the time period of correspondence and each PRB frequency band on dispatched storage based on self, Macro eNB can mate and identifies the MUE that has disturbed the reception of Pico eNB signal.Continue PicoeNB is produced uplink interference for fear of these MUE, that Macro eNB arranges is suitable, can avoid or reduce Pico eNB is produced the scheduling strategy that disturbs, as reshuffles the Serving cell etc. of MUE.The RESOURCE STATUS UPDATE message that periodically sends can make Macro eNB make timely and adjust.
Recognition methods, the Apparatus and system of the subscriber equipment that causes uplink interference of the invention process example, be best suited for the situation that macro base station and low-power little base station coexists, but be not limited to above-mentioned situation, said method, Apparatus and system also are suitable for other LPN (for example, Home eNodeB, via node etc.).
From above description, can find out, low power nodes (LPN) reports its uplink interference degree information suffered on each resource units to macro base station (Macro eNB) in embodiments of the present invention, macro base station is determined the MUE that it is dispatched on the disturbed resource units of LPN, identify the MUE that low power nodes has been caused uplink interference, thereby macro base station can arrange suitable scheduling strategy, avoids causing the MUE of uplink interference to continue low power nodes is produced interference.
obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step being made into the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. a recognition methods that causes the subscriber equipment of uplink interference, is characterized in that, comprising:
Macro base station receives the up degree information that is disturbed that low power nodes LPN reports, and wherein, the described up degree information that is disturbed comprises: LPN is disturbed degree information on each resource units in the certain hour section;
Described macro base station is according to the described up subscriber equipment that degree information and described macro base station were dispatched on described each resource units within the described time period that is disturbed, and identification causes the subscriber equipment of uplink interference to described LPN.
2. method according to claim 1, is characterized in that, reports the described up degree information that is disturbed of described LPN to described macro base station, comprising:
Described LPN is by the described up degree information that is disturbed of the described LPN of load information information reporting.
3. method according to claim 1, is characterized in that, macro base station receives that low power nodes LPN reports up be disturbed degree information before, described method also comprises:
The up degree information that on average is disturbed of frequency domain constituent parts resource in the certain hour section that the described LPN of described macro base station reception reports;
In described up be disturbed on average that degree information carries up when on average being disturbed degree and reaching predetermined threshold value, send the resource status request message to described LPN, ask described LPN reporting uplink to be disturbed degree information.
4. method according to claim 3, it is characterized in that, macro base station receives the up degree information that is disturbed that low power nodes LPN reports, comprise: described macro base station receives described LPN and is receiving the resource status updating message of returning after described resource status request message, wherein, contain the described up degree information that is disturbed in described resource status updating message.
5. the described method of any one according to claim 1 to 4, is characterized in that,
The described up degree information that is disturbed also comprises: the system frame number SFN of the initial radio frames time point of described each resource units of indication;
Before identification caused the user equipment (UE) of uplink interference to described LPN, described method also comprised: each resource units corresponding with described each resource units of determining described macro base station according to described SFN.
6. the described method of any one according to claim 1 to 4, is characterized in that, described method also comprises: described macro base station is preserved described macro base station schedule information to the up transmitted signal of subscriber equipment within the described time period.
7. the described method of any one according to claim 1 to 4, is characterized in that, described resource units is 180kHZ on frequency, comprises at least in time 0.5ms.
8. a recognition device that causes the subscriber equipment of uplink interference, is characterized in that, comprising:
Receiver module be used for to receive the up degree information that is disturbed that low power nodes LPN reports, and wherein, the described up degree information that is disturbed comprises: LPN is disturbed degree information on each resource units in the certain hour section;
Identification module is used for according to the described up subscriber equipment that program information and described macro base station were dispatched on described each resource units within the described time period that is disturbed, and identification causes the subscriber equipment of uplink interference to described LPN.
9. device according to claim 8, is characterized in that,
Described receiver module also is used for receiving the up degree information that on average is disturbed of each unit resource of frequency domain in the certain hour section that described LPN reports;
Described device also comprises: sending module, be used in described up be disturbed on average that degree information carries up when on average being disturbed degree and reaching predetermined threshold value, send the resource status request message to described LPN, ask described LPN reporting uplink to be disturbed degree information.
10. according to claim 8 or 9 described devices, is characterized in that, described device also comprises:
Determination module is used for determining each resource units corresponding with described each resource units of described macro base station according to described SFN described up when being disturbed degree information and comprising the SFN of the initial radio frames time point of indicating described each resource units.
11. a recognition system that causes the subscriber equipment of uplink interference is characterized in that, comprising:
Low power nodes LPN is used for reporting the up degree information that is disturbed of described LPN to macro base station with cycle and/or event mode, and wherein, the described up degree information that is disturbed comprises: be disturbed degree information in the certain hour section on each resource units;
Described macro base station comprises the described device of any one in claim 8 to 10, is used for receiving the up degree information that is disturbed that low power nodes LPN reports; And according to the described up subscriber equipment that degree information and described macro base station were dispatched on described each resource units within the described time period that is disturbed, identification causes the subscriber equipment of uplink interference to described LPN.
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| CN105874868A (en) * | 2014-03-19 | 2016-08-17 | 华为技术有限公司 | Cell node and uplink interference processing system and method |
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| CN101541088A (en) * | 2008-03-19 | 2009-09-23 | 中国移动通信集团公司 | Method, device and system for eliminating interference among cells |
| CN101742550B (en) * | 2008-11-06 | 2012-08-22 | 华为技术有限公司 | Method, related equipment and system for fixing user influencing neighbor cell |
| CN101754262B (en) * | 2008-12-10 | 2012-11-14 | 中兴通讯股份有限公司 | Overload indicator report trigger method based on user terminal physical resource interference |
| CN101815301A (en) * | 2010-03-17 | 2010-08-25 | 华为技术有限公司 | Interference coordination method, system and apparatus |
| CN102256367A (en) * | 2010-05-20 | 2011-11-23 | 普天信息技术研究院有限公司 | Scheduling method and device for reducing inter-cell interference |
| CN102256365B (en) * | 2010-05-20 | 2014-11-05 | 普天信息技术研究院有限公司 | Method and device for reducing inter-cell interference |
| CN102143501B (en) * | 2011-03-31 | 2013-12-18 | 华中科技大学 | Method for identifying interfered mobile terminals and methods for avoiding interference |
| CN103024916B (en) * | 2011-09-26 | 2015-10-07 | 中国移动通信集团公司 | A kind of method and apparatus determining uplink interference terminal |
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| CN105874868B (en) * | 2014-03-19 | 2019-10-25 | 华为技术有限公司 | A kind of cell Node, uplink interference processing system and method |
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