CN102892121B

CN102892121B - The method and system that reduction Microcell is disturbed the descending out-of-band radiation of macro cell terminal

Info

Publication number: CN102892121B
Application number: CN201110207268.9A
Authority: CN
Inventors: 刁心玺; 许玲; 张健; 张峻峰; 彭佛才
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2017-09-29
Anticipated expiration: 2031-07-22
Also published as: CN102892121A

Abstract

The invention discloses the method and system that reduction Microcell is disturbed the descending out-of-band radiation of macro cell terminal, Microcell determines the running time-frequency resource position that the up channel of macro cell terminal over a second frequency band is used, radio-frequency power or RF signal strength that the macro cell terminal transmission signal reaches the Microcell are measured on the time-frequency location, to network side report measurement results and/or the identification information of the macro cell terminal；The content that network side is reported using the Microcell determines the macro cell terminal disturbed by the strong descending out-of-band radiation in the Microcell, the down channel resources outside the first descending out-of-band radiation interference and insulation frequency band are assigned for the macro cell terminal on the first band of frequencies, and/or are on a third band the down channel resources outside Microcell WAP the 3rd descending out-of-band radiation interference and insulation frequency band of assignment of the Microcell.This programme can reduce Microcell WAP to the out-of-band radiation interference by the strongly disturbing macro cell terminal in this Microcell.

Description

The method and system that reduction Microcell is disturbed the descending out-of-band radiation of macro cell terminal

Technical field

The descending out-of-band radiation of macro cell terminal is disturbed the present invention relates to wireless communication field, more particularly to reduction Microcell Method and system.

Background technology

In order to increase power system capacity, improve more next in flexibility and frequency spectrum service efficiency that frequency spectrum is used, wireless access network Covered more using macrocell and cover the networking mode being combined with Microcell.In the real network of some operators, family Front yard base station or microcell base station have been applied, in standard discussion, third generation partner program (3rd Generation Partnership Project, i.e. 3GPP) Long Term Evolution (Long Term Evolution, abbreviation LTE) Interim discussion also is carried out to digital repeater (RELAY) technology and household base station technology in system, by Microcell and grand small District's groups into the standardization of heterogeneous network (HetNet) also paid close attention in 3 gpp by vast operator and equipment vendor.

In the heterogeneous network that macrocell and Microcell are constituted, when Microcell WAP and macrocell WAP work Make in nearby frequency bands when, network side it needs to be determined that macrocell WAP service terminal whether with Microcell wireless access There is out-of-band radiation interference between point or be referred to as neck frequency and disturb, and consider how to control this out-of-band radiation to disturb.Out-of-band radiation Interference problem is obtained in third generation partner program (3rd Generation Partnership Project, i.e. 3GPP) Discuss, an application scenarios are Long Term Evolution (Long Term Evolution, the abbreviation LTE) bases disposed on 700MHz frequency bands Stand to adjacent frequency band dispose ground TV broadcast channel interference, solution be use filtering of the lower adjacent frequency with leakage power Device (improves ACLR).

In the prior art, a kind of method that terminal transmission signal is measured and handled is as follows：

Application No. 96195253.9, Publication No. CN96195253, the entitled " receipts for cell planning Hair machine is tested " patent be referred to as file 1 provide it is a kind of other base station signal issued to terminal intercept and capture the method for measurement include： In the cellular communication system with multiple serving cells, each serving cell is by least one clothes in multiple existing base stations A kind of business, method for determining new micro-base station aerial position comprises the following steps：There is provided at the test position of a serving cell One test antenna；In a predetermined amount of time, a monitoring process is performed, is comprised the following steps：Connect in test antenna Receive the up-link access attempts signal from movement station desired transmitting into existing base station；The received uplink of measurement The signal intensity of road access attempts signal；Measured signal intensity is compared with predetermined threshold level；If moreover, institute The signal intensity of measurement is more than predetermined threshold level, then count value is just incremented by；And after monitoring process is completed, will count Value compared with predetermined count value, and if count value be more than predetermined count value, then just the test position set up newly Micro-base station.

A kind of technology in macrocell and small interval shared frequency spectrum is as follows：

Publication No. US20100099431 (A1) is entitled " to be shared in macrocell and Microcell and implements dry on frequency spectrum Disturb method and system (the Method and system for interference management in a of management Spectrum shared by WAN and FEMTO cells) United States Patent (USP) be referred to as the method that file 2 provides include it is as follows Step：1) detection is located in picocell coverage area and is linked into the terminal of macrocell；2) macrocell radio node hair is intercepted and captured Control signaling to the terminal for being linked into the macrocell；3) at least partially by the information included in the control signaling, come Determine the first frequency spectrum resource used in the communication between macrocell and macro cell terminal；4) based in part on the described first frequency Spectrum resource, to determine the second frequency spectrum resource that Microcell terminal is used.The intercepting and capturing macrocell radio node, which is issued, is linked into this The control signaling of the terminal of macrocell, further comprises receiving some information from macro cell terminal, in favor of believing the control The intercepting and capturing of breath；Further, including receive C-RNTI (Cell Radio Network Temporary Identifier) and MAC ID(Media Access Control Identifier).Further, the control information is wirelessly saved including macrocell The broadcast message that point is sent, ACK/NAC information；It is described to determine, including to up or/and downlink bandwidth configuration.

A kind of method for suppressing adjacent frequency interference is as follows：

Application No. 201010109066.6, Publication No. CN101834628A, a kind of entitled " adjacent frequency interference suppression The patent of method and device processed " is referred to as the method that file 3 provides：Detection receives in signal whether include adjacent frequency interference signal； When receive include adjacent frequency interference signal in signal when, detection adjacent frequency interference signal frequency spectrum be on the left side of useful signal frequency spectrum or The right；When the left side of the adjacent frequency interference signal frequency spectrum in useful signal, then selection output docking, which is collected mail, number carries out right unilateral filtering Signal afterwards, when the right in useful signal of adjacent frequency interference signal frequency spectrum, then selection output docking collect mail number carry out it is left unilateral Filtered signal.The embodiment of the present invention is by detecting receive in signal whether include adjacent frequency interference signal and adjacent frequency interference signal Frequency spectrum is the Left or right in useful signal frequency spectrum, and according to testing result, the unilateral filtered signal of selection output is real Show and the accuracy suppressed is disturbed to adjacent frequency, and do not influenceed sensitivity behaviour.

In terms of the prior art measured to macro cell terminal transmission signal, do not provide and how to drop in above-mentioned file 1 Method of the humble cell WAP to the adjacent frequency interference of macro cell terminal.

In terms of macrocell with small interval shared frequency spectrum, given in above-mentioned file 2 be sent to using macro base station it is grand small Information included in the control command of area's terminal is come for the method for Microcell terminal distribution resource, including realizes Microcell terminal The method of spatial reuse macrocell resource between macro cell terminal, still, does not give control Microcell WAP transmitting Method of the passage to the adjacent frequency interference of macro cell terminal.

In terms of adjacent frequency interference is suppressed, above-mentioned file 3 gives a kind of method that terminal suppresses adjacent band interference, is directed to Unilateral filtering signal is exported, and needs to introduce new wave filter in terminal, the complexity of terminal is added.

The content of the invention

It is dry to the descending out-of-band radiation of macro cell terminal the technical problem to be solved in the present invention is to provide one kind reduction Microcell The method and system disturbed, Microcell WAP is reduced to capable and experienced by this Microcell by out-of-band radiation interference and insulation frequency band The out-of-band radiation interference for the macro cell terminal disturbed.

In order to solve the above-mentioned technical problem, the invention provides one kind reduction Microcell to spoke outside the descending band of macro cell terminal The method that blackberry lily is disturbed, wherein,

Microcell determines the running time-frequency resource position that the up channel of macro cell terminal over a second frequency band is used, when described Radio-frequency power or RF signal strength that the macro cell terminal transmission signal reaches the Microcell are measured on frequency position, to The identification information of network side report measurement results and/or the macro cell terminal；

The content that network side is reported using the Microcell determines what is disturbed by the strong descending out-of-band radiation in the Microcell Macro cell terminal, is assigned outside the first descending out-of-band radiation interference and insulation frequency band for the macro cell terminal on the first band of frequencies Down channel resources, and/or assign on a third band outside the 3rd descending band for the Microcell WAP of the Microcell Down channel resources outside radiation interference isolation frequency band；

Wherein, first band is the downstream bands of the macrocell, and the 3rd frequency band is the downstream bands of the Microcell, the One frequency band and the 3rd frequency band be adjacent frequency band or exist in the middle of first band and the 3rd frequency band one it is not whole by macrocell The 5th frequency band that end and/or Microcell terminal are used；

First band includes adjacent the first descending sub-band and the second descending sub-band, the first descending sub-band and the 3rd Frequency band is adjacent with the 5th frequency band；First descending out-of-band radiation isolation frequency band be the sub-band of the first descending sub-band and with 3rd frequency band is adjacent with the 5th frequency band；

3rd frequency band includes adjacent the first descending sub-band and the second descending sub-band, the first descending sub-band and first Frequency band is adjacent with the 5th frequency band；3rd descending out-of-band radiation isolation frequency band be the sub-band of the first descending sub-band and with First band is adjacent with the 5th frequency band.

Further, the above method can also have the characteristics that：

The content that network side is reported using the Microcell is determined to use outside the first descending band with spatial multiplexing mode Radiation interference isolates candidate's macro cell terminal of frequency band, is the time on the described first descending out-of-band radiation interference and insulation frequency band Macro cell terminal is selected to assign down channel resources.

Further, the above method can also have the characteristics that：

The mode for determining the running time-frequency resource position that the up channel of macro cell terminal over a second frequency band is used is such as lower section One kind in formula：

One, the uplink channel resources configuration that macrocell WAP is sent to macro cell terminal is intercepted and captured on interface in the air Information, knows the running time-frequency resource position that the up channel of the macro cell terminal is used from the ascending resource configuration information； Or；

Two, resource assignment information of the macrocell scheduler to macro cell terminal is obtained in network side, from the resource assignation The running time-frequency resource position that the up channel of the macro cell terminal is used is known in information；

Three, the identification information and macro cell terminal for obtaining the Sounding Reference Signal that macro cell terminal is sent send letter The running time-frequency resource information of road detection reference signal.

Further, the above method can also have the characteristics that：

It is determined that in being in the following manner by the mode of the macro cell terminal of the strong descending out-of-band radiation interference in the Microcell It is a kind of：

One, judge to be more than the measurement result of macro cell terminal transmission signal the first descending decision threshold and described grand small When the down channel of area's terminal is configured on the first descending sub-band that the first band is included, this macro cell terminal is determined For by the macro cell terminal of the strong descending out-of-band radiation interference in the Microcell；

Two, when judging that being more than macrocell to the measurement result of macro cell terminal transmission signal starts measurement thresholding, start institute Measurement of the macro cell terminal to the downlink signal of the Microcell is stated, the Microcell that macro cell terminal is measured is judged The radio-frequency power or RF signal strength of transmission signal are more than under the second descending decision threshold and the macro cell terminal When row channel configuration is on the first descending sub-band that the first band is included, this macro cell terminal is defined as by described The macro cell terminal of the strong descending out-of-band radiation interference in Microcell；

Three, when judging that being more than macrocell to the measurement result of macro cell terminal transmission signal starts measurement thresholding, start institute Measurement of the macro cell terminal to the downlink signal of the Microcell is stated, the Microcell that macro cell terminal is measured is judged Downlink signal leakage power on the first band of frequencies be more than the 3rd descending decision threshold and the macro cell terminal When down channel configuration is on the first descending sub-band that the first band is included, this macro cell terminal is defined as by institute State the macro cell terminal of the strong descending out-of-band radiation interference in Microcell.

Further, the above method can also have the characteristics that：

It is determined to use candidate's macro cell terminal of descending out-of-band radiation interference and insulation frequency band with spatial multiplexing mode Mode is one kind in the following manner：

One, judge to be less than or equal to the measurement result of macro cell terminal transmission signal the first descending out-of-band radiation space every From decision threshold and the down channel of the macro cell terminal configuration outside the first descending out-of-band radiation interference and insulation frequency band Downstream bands on when, determine this macro cell terminal be can with spatial multiplexing mode using descending out-of-band radiation interference and insulation frequency Candidate's macro cell terminal of band；

Two, when judging that being more than macrocell to the measurement result of macro cell terminal transmission signal starts measurement thresholding, start institute Measurement of the macro cell terminal to the downlink signal of the Microcell is stated, the radio-frequency power of the Microcell transmission signal is judged Or RF signal strength is less than or equal to more than the first descending out-of-band radiation space isolation decision threshold and the macrocell When the down channel of terminal is configured on the first descending sub-band that the first band is included, it is energy to determine this macro cell terminal Candidate's macro cell terminal of descending out-of-band radiation interference and insulation frequency band is enough used with spatial multiplexing mode.

Further, the above method can also have the characteristics that：

The macro cell terminal transmission signal is one kind in signals below：

The business datum signal that the macro cell terminal is launched on reverse link traffic channel；

The control signal that the macro cell terminal is sent on ascending control channel；

The Sounding Reference Signal that the macro cell terminal is sent.

In order to solve the above-mentioned technical problem, the invention provides one kind reduction Microcell to spoke outside the descending band of macro cell terminal The system that blackberry lily is disturbed, the system includes macrocell monitoring unit, monitoring result reporting unit, out-of-band radiation interference coordination list Member；First band is the downstream bands of the macrocell, and the 3rd frequency band is the downstream bands of the Microcell, first band and the Three frequency bands are adjacent frequency band or have one in the middle of first band with the 3rd frequency band not by macro cell terminal and/or small The 5th frequency band that area's terminal is used；First band is included under adjacent the first descending sub-band and the second descending sub-band, first Row sub-band and the 3rd frequency band or adjacent with the 5th frequency band；First descending out-of-band radiation isolation frequency band is the first descending sub-band Sub-band and with the 3rd frequency band or adjacent with the 5th frequency band；3rd frequency band includes adjacent the first descending sub-band and the Two descending sub-bands, the first descending sub-band is with first band or adjacent with the 5th frequency band；3rd descending out-of-band radiation isolation Frequency band is the sub-band of the first descending sub-band and with first band or adjacent with the 5th frequency band；

Macrocell monitoring unit, the running time-frequency resource position used for the up channel in macro cell terminal over a second frequency band Put and measure radio-frequency power or RF signal strength that the macro cell terminal transmission signal reaches the Microcell；

Monitoring result reporting unit, for the identification letter to network side report measurement results and/or the macro cell terminal Breath；

Out-of-band radiation interference coordination unit, the content for being reported according to monitoring result reporting unit is determined by described micro- The macro cell terminal of the strong descending out-of-band radiation interference of cell, assigns the first descending band for the macro cell terminal on the first band of frequencies Down channel resources outside external radiation interference and insulation frequency band, and/or on a third band for the Microcell Microcell without Line access point assigns the down channel resources outside the 3rd descending out-of-band radiation interference and insulation frequency band.

Further, said system can also have the characteristics that：

The out-of-band radiation interference coordination unit, is also used for the content that the Microcell reports and is determined to space Multiplex mode uses candidate's macro cell terminal of the first descending out-of-band radiation interference and insulation frequency band, the spoke outside the described first descending band It is candidate's macro cell terminal assignment down channel resources to penetrate on interference and insulation frequency band.

Further, said system can also have the characteristics that：

The radio frequency reception that macrocell monitoring unit includes frequency band where bandwidth chahnel covers macro cell terminal launch channel leads to Road, macrocell monitoring unit, monitoring result reporting unit and the same cell deployment of Microcell WAP, three belongs to same thing Reason device adheres to different physical units separately.

Further, said system can also have the characteristics that：

Out-of-band radiation interference coordination unit, a kind of in being additionally operable in the following manner determine by the Microcell it is strong under The macro cell terminal of row out-of-band radiation interference：

Further, said system can also have the characteristics that：

Out-of-band radiation interference coordination unit, one kind in being additionally operable in the following manner is determined to spatial multiplexing mode Use candidate's macro cell terminal of descending out-of-band radiation interference and insulation frequency band：

Such scheme can reduce Microcell WAP to by this Microcell by out-of-band radiation interference and insulation frequency band The out-of-band radiation interference of strongly disturbing macro cell terminal, the macrocell realized by Microcell weak jamming is isolated further through utilization space The utilization of terminal-pair out-of-band radiation interference and insulation frequency band, improves the service efficiency of macrocell WAP frequency spectrum.

Brief description of the drawings

Fig. 1 is to reduce the method schematic diagram that Microcell is disturbed the descending out-of-band radiation of macro cell terminal；

Fig. 2 is the method schematic diagram that reduction Microcell is disturbed the descending out-of-band radiation of macro cell terminal in specific embodiment.

Embodiment

The system that reduction Microcell is disturbed the descending out-of-band radiation of macro cell terminal includes macrocell monitoring unit, monitoring knot Fruit reporting unit, out-of-band radiation interference coordination unit；First band is the downstream bands of the macrocell, and the 3rd frequency band is described The downstream bands of Microcell, first band and the 3rd frequency band are adjacent frequency bands or deposited in the middle of first band with the 3rd frequency band In the 5th frequency band not used by macro cell terminal and/or Microcell terminal；It is descending that first band includes adjacent first Sub-band and the second descending sub-band, the first descending sub-band and the 3rd frequency band or adjacent with the 5th frequency band；First descending band External radiation isolation frequency band be the first descending sub-band sub-band and with the 3rd frequency band or adjacent with the 5th frequency band；3rd frequency Band includes adjacent the first descending sub-band and the second descending sub-band, and the first descending sub-band is with first band or with the 5th Frequency band is adjacent；3rd descending out-of-band radiation isolation frequency band be the sub-band of the first descending sub-band and with first band or with 5th frequency band is adjacent.

Macrocell monitoring unit, the running time-frequency resource position used for the up channel in macro cell terminal over a second frequency band Put and measure radio-frequency power or RF signal strength that the macro cell terminal transmission signal reaches the Microcell.

Monitoring result reporting unit, for the identification letter to network side report measurement results and/or the macro cell terminal Breath.

Such scheme can reduce Microcell WAP to by this Microcell by out-of-band radiation interference and insulation frequency band The out-of-band radiation interference of strongly disturbing macro cell terminal.

Generally, macrocell WAP uses first band as its downstream bands, is made using second band For its upstream band；Described Microcell WAP uses the 3rd frequency band as its downstream bands, is made using the 4th frequency band For its upstream band.

Out-of-band radiation interference coordination unit is also used for the content that the Microcell reports and is determined to spatial reuse Mode uses candidate's macro cell terminal of the first descending out-of-band radiation interference and insulation frequency band, dry in the described first descending out-of-band radiation It is candidate's macro cell terminal assignment down channel resources to disturb on isolation frequency band.

Such scheme can isolate by using space realizes the macro cell terminal by Microcell weak jamming to out-of-band radiation The utilization of interference and insulation frequency band, improves the service efficiency of macrocell WAP frequency spectrum.

Out-of-band radiation interference coordination unit is additionally operable to determine by the grand small of the strong descending out-of-band radiation interference in the Microcell Area's terminal, and be determined to whole using candidate's macrocell of descending out-of-band radiation interference and insulation frequency band with spatial multiplexing mode End.

Wherein, the radio frequency of frequency band connects where macrocell monitoring unit includes bandwidth chahnel covering macro cell terminal launch channel Passage is received, macrocell monitoring unit, monitoring result reporting unit and the same cell deployment of Microcell WAP, three belong to same One physical unit adheres to different physical units separately.Macrocell monitoring unit is logical comprising the reception of work on the first band of frequencies Road, receives the Downlink Control Information that macrocell is issued on the first band of frequencies, and the Downlink Control Information refers to for macro cell terminal Assign the information of uplink channel resources.Macrocell monitoring unit includes receiving channel work over a second frequency band, in the second frequency Take the signal intensity or signal power at reception macro cell terminal transmission signal arrival Microcell WAP.

As shown in figure 1, the method that reduction Microcell is disturbed the descending out-of-band radiation of macro cell terminal includes：

The above method can reduce Microcell WAP to by this Microcell by out-of-band radiation interference and insulation frequency band The out-of-band radiation interference of strongly disturbing macro cell terminal.

The measurement macro cell terminal transmission signal of the present invention reaches the radio-frequency power of the Microcell or penetrated Frequency signal intensity, wherein the macro cell terminal transmission signal is one kind in signals below：

Sounding Reference Signal (Sounding Reference Signal, abbreviation that the macro cell terminal is sent SRS)。

The above method also includes：The content that network side is reported using the Microcell is determined to make with spatial multiplexing mode With candidate's macro cell terminal of the first descending out-of-band radiation interference and insulation frequency band, in the described first descending out-of-band radiation interference and insulation It is candidate's macro cell terminal assignment down channel resources on frequency band.Candidate's macro cell terminal is that down channel configuration exists There is the grand of big propagation path loss outside descending out-of-band radiation interference and insulation band and between the WAP of Microcell Cell terminal, judge to may be referred to during propagation path loss one measure or the standard thresholding that counts, with Microcell without Propagation path loss between line access point is prescribed a time limit more than this standard gate, is referred to as having big between the WAP of Microcell Propagation path loss.

One effect of candidate's macro cell terminal is：For realizing in descending out-of-band radiation interference and insulation frequency band and descending band The load balancing between macrocell frequency band outside external radiation interference and insulation frequency band.Such scheme can isolate real by using space Now the macro cell terminal by Microcell weak jamming is utilized to out-of-band radiation interference and insulation frequency band, improves macrocell WAP The service efficiency of frequency spectrum.

Can be according to the band external leakage power parameter and out-of-band radiation interference protection ratio parameter of Microcell transmission channel come really The width of row out-of-band radiation interference and insulation frequency band is fixed, the value of the width of descending out-of-band radiation interference and insulation frequency band is as next Kind：1) a predetermined fixing band width values；2) one or more bandwidth value that in-situ power measurement result is determined is combined.

It was found from from foregoing description mode, it is determined that by the macro cell terminal of the strong descending out-of-band radiation interference in the Microcell And when being determined to use candidate's macro cell terminal of descending out-of-band radiation interference and insulation frequency band with spatial multiplexing mode, can be with The measurement result of macro cell terminal is determined according to what Microcell was reported, can also be reported according to Microcell to macro cell terminal Measurement result, start macro cell terminal Microcell is measured, according to the measurement result of macro cell terminal determine.Start grand Cell terminal includes to the method for the measurement of Microcell：The lateral macro cell terminal of network is sent for accessing Microcell down channel Parameter, include the one or more of following parameter：1) the downlink frequency of Microcell WAP indicates parameter；2) The identification parameter of Microcell WAP；3) the measured channel category of Microcell WAP；4) Microcell wirelessly connects The wireless access technology that access point is used indicates parameter.

Carry out concrete example as follows：

The measurement result to macro cell terminal reported according to Microcell is determined by spoke outside the strong descending band in the Microcell Macro cell terminal that blackberry lily is disturbed and the time for being determined to use descending out-of-band radiation interference and insulation frequency band with spatial multiplexing mode Selecting an exemplary method of macro cell terminal includes：

Judge one, the potential terminal that is disturbed judges：The signal work(obtained to macro cell terminal measurement that Microcell is reported Rate or signal intensity are compared with the first descending decision threshold, if greater than the first descending decision threshold, are then sentenced the terminal Terminal is disturbed to be potential, otherwise, then is judged to the terminal non-potential be disturbed terminal；Or, progress judges two.

Judge two, the macro cell terminal be judged to it is non-it is potential be disturbed terminal after, further, the terminal is entered The judgement of the descending out-of-band radiation interference and insulation frequency band candidate terminal of row spatial reuse.Specifically, by Microcell report to grand small The signal power or signal intensity that area's terminal measurement is obtained are isolated decision threshold with the first descending out-of-band radiation space and are compared, Isolate decision threshold if less than the first descending out-of-band radiation space, also, the current down channel configuration of macro cell terminal exists In macrocell downstream bands outside descending out-of-band radiation interference and insulation frequency band, just the terminal is judged to outside the descending band of spatial reuse Radiation interference isolates frequency band candidate terminal.

Wherein, the first descending out-of-band radiation space isolation decision threshold is a real number, and value is less than the first descending judgement The value of thresholding.

According to the measurement result to macro cell terminal, start after macro cell terminal is measured to Microcell and determine by institute State the macro cell terminal of the strong descending out-of-band radiation interference in Microcell and be determined to use outside descending band with spatial multiplexing mode One exemplary method of candidate's macro cell terminal of radiation interference isolation frequency band includes：

(1) measurement result of a macro cell terminal and macrocell are started measurement thresholding and are compared by network side, if The radio-frequency power for the macro cell terminal that Microcell is measured is more than macrocell and starts measurement thresholding, just starts the macro cell terminal Measurement to the down control channel of the Microcell that reports the measurement result, specific down control channel is following one kind： CPICH Common Pilot Channel；Broadcast channel；Synchronizing information.

(2) measurement result is reported network side by macro cell terminal.

(3) the Microcell signal power or signal intensity that network side is measured according to macro cell terminal, do in accordance with the following steps Judge：

It is potential to be disturbed terminal judgement：Under Microcell signal power or signal intensity and second that macro cell terminal is measured Row decision threshold is compared, if greater than the second descending decision threshold, then by the terminal be judged to it is potential be disturbed terminal, it is no Then, then the terminal is judged to non-potential be disturbed terminal.

The macro cell terminal be judged to it is non-it is potential be disturbed terminal after, further, space is carried out to the terminal It is multiplexed the judgement of descending out-of-band radiation interference and insulation frequency band candidate terminal.Specifically, the Microcell macro cell terminal measured Signal power or signal intensity are isolated decision threshold with the second descending out-of-band radiation space and are compared, descending if less than second Out-of-band radiation space isolates decision threshold, also, its current down channel is configured in descending out-of-band radiation interference and insulation frequency band Outside macrocell downstream bands on, the terminal is just judged to the descending out-of-band radiation interference and insulation frequency band candidate of spatial reuse whole End；

Wherein, the second descending out-of-band radiation space isolation decision threshold is a real number, and value is less than the second descending judgement The value of thresholding.

In the above method, the entity judged can be that Microcell side can also be network side.

When the entity judged is Microcell side, Microcell side is judged by the strong descending out-of-band radiation in the Microcell The macro cell terminal of interference and can with spatial multiplexing mode using descending out-of-band radiation interference and insulation frequency band candidate it is grand small After area's terminal, the mark of corresponding terminal can be only sent to network side, network side directly knows determine grand small according to mark Area's terminal.

When the entity judged is network side, Microcell to network side report measurement results and macro cell terminal identification Information, network side according to measurement result judge the macro cell terminal disturbed by the strong descending out-of-band radiation in the Microcell and Candidate's macro cell terminal of descending out-of-band radiation interference and insulation frequency band can be used with spatial multiplexing mode.

Specific embodiment one

Application scenarios are disturbed the out-of-band radiation of UMTS macro cell terminals to suppress OFDM Microcells.

In this specific embodiment one, macrocell uses UMTS high-speed packets access (HSPA) technology, macrocell HSPA The first band (downstream bands) of system is 10MHz bandwidth, be configured with thereon the first descending carrier and the second descending carrier this Two adjacent descending carriers, the bandwidth of each carrier wave is 5MHz；The second band (upstream band) of macrocell HSPA systems is 10MHz bandwidth, two the first and second adjacent up-link carriers is configured with thereon, the bandwidth of each carrier wave is 5MHz；With On the 3rd adjacent frequency band (downstream bands) of the first band, deploy under the Microcell using LTE wireless access technologys Row channel, the bandwidth of the downstream bands (the 3rd frequency band) of Microcell WAP is 20MHz.

In this specific embodiment, described UMTS system and LTE system belongs to same operator, it is allowed to small region measurement Unit accesses the down control channel of macrocell, obtains related control information.

At least one macro cell terminal, i.e. UMTS terminals are also included in the system, this terminal refers to that one is deposited with macrocell In the terminal of wireless link, the terminal at least supports UMTS HSDPA wireless access technologys.

Macrocell monitoring unit in Microcell receives UMTS WAPs in the first band that HSDPA systems are used The control command issued, control command described here is traffic order, and traffic order is that macro cell terminal assigns up channel Resource.Also, the interference preventer receives the control on two descending carriers in the first band that HSDPA systems are used Order.

The macrocell that macrocell monitoring unit in Microcell is received according to it on the first band of frequencies is over a second frequency band The uplink channel resources position assigned for macro cell terminal, receives UMTS macrocells in the second band that HSDPA systems are used The signal of terminal transmission, measures the radio-frequency power or signal intensity at its arrival Microcell WAP.

The out-of-band radiation interference coordination unit of Microcell determines undetermined by the strong descending out-of-band radiation interference in the Microcell Macro cell terminal and candidate's macro cell terminal undetermined, determination mode is：By the uplink transmission power of terminal with reporting decision gate Limit one compares, uplink transmission power be more than report decision threshold one terminal be determined as it is undetermined by the strong descending band in the Microcell The macro cell terminal of external radiation interference, by the uplink transmission power of terminal with reporting decision threshold two to be compared, uplink transmission power It is determined as candidate's macro cell terminal undetermined less than the terminal of decision threshold two is reported.Report decision threshold two to be less than or equal to report Decision threshold one.

The monitoring result reporting unit of Microcell is by undetermined by the grand small of the strong descending out-of-band radiation interference in the Microcell The mark of area's terminal and corresponding uplink transmission power are sent to network side equipment, and/or by candidate's macro cell terminal undetermined Mark and corresponding uplink transmission power send to network side.

Network side determined from the macro cell terminal of descending out-of-band radiation interference strong by the Microcell undetermined by The macro cell terminal of the strong descending out-of-band radiation interference in the Microcell, determines that candidate is grand small from candidate's macro cell terminal undetermined Area's terminal.Specific recognition methods is as follows：

First, carry out judging 1, that is, carry out the potential terminal that is disturbed and judge：The one group of measurement result reported from Microcell is (i.e. To in the signal power or signal intensity of macro cell terminal) in, according to order from big to small, choose one or several measurements As a result, the signal power come or signal intensity (i.e. measurement result) will be selected with descending out-of-band radiation interference decision threshold one to enter Row compares, and decision threshold is disturbed if greater than the first descending out-of-band radiation, then by the terminal be judged to it is potential be disturbed terminal, and eventually Only this terminal is determined whether；Otherwise, then by the terminal be judged to it is non-it is potential be disturbed terminal, and further do and sentence as follows It is disconnected：

Judge two, the judgement of the descending out-of-band radiation interference and insulation frequency band candidate terminal of spatial reuse is carried out to the terminal.Tool Body, the signal power obtained to macro cell terminal measurement or signal intensity that Microcell is reported and the first descending out-of-band radiation Interference space isolation decision threshold is compared, and isolates decision threshold one if less than descending out-of-band radiation interference space, also, The current down channel of macro cell terminal is configured in the macrocell downstream bands outside descending out-of-band radiation interference and insulation frequency band, The terminal is just judged to the descending out-of-band radiation interference and insulation frequency band candidate terminal of spatial reuse；

After above-mentioned judgement is completed, network side is by the potential down channel configuration for being disturbed terminal the of first band On two descending sub-bands, the first descending sub-band is the sub-band being located between the second descending sub-band and the 3rd frequency band, at this In embodiment, the bandwidth of the first descending sub-band is 5MHz, is to determine due to UMTS downlink radio frequency passage occupied bandwidth 5MHz, the width of descending out-of-band radiation interference and insulation frequency band here just takes 5MHz.

Further, network side matches somebody with somebody the down channel of the descending out-of-band radiation interference and insulation frequency band candidate terminal of spatial reuse Put on the first descending sub-band.Although the first descending sub-band is adjacent with the 3rd frequency band, due to can be descending with spatial reuse There is big propagation path between the candidate's macro cell terminal and Microcell WAP of out-of-band radiation interference and insulation frequency band to damage Consumption, so the band external leakage power of the Microcell access point launch channel on the 3rd frequency band will not be produced to the macro cell terminal and done Disturb.

Specific embodiment two

Application scenarios are disturbed the out-of-band radiation of OFDM macro cell terminals to suppress OFDM Microcells.

In the present embodiment, the downlink radio frequency passage of macrocell is configured in first band, the upstream radio-frequency passage of macrocell Configuration is in second band；The downlink radio frequency passage configuration of Microcell exists in the 3rd frequency band, the upstream radio-frequency passage configuration of Microcell 4th frequency band.Microcell and macrocell all use same wireless access technology, still, what Microcell and macrocell were used in system It can be one kind of following combination on duplex mode：

Macrocell is LTE TDD systems, and Microcell is LTE TDD systems；

Macrocell is LTE TDD systems, and Microcell is LTE FDD systems；

Macrocell is LTE FDD systems, and Microcell is LTE TDD systems；

Macrocell is LTE FDD systems, and Microcell is LTE FDD systems；

In the present embodiment, using 4) kind system configuration mode, also, Microcell and macrocell are to belong to different operations The system being operated in nearby frequency bands of business.

Specifically, as shown in Fig. 2 first band is 2621MHz~2640MHz frequency bands, what is disposed thereon is LTE FDD systems System, the macrocell WAP of the system is configured with a descending carrier in 20MHz bandwidth；3rd frequency band is 2641MHz ~2660MHz frequency bands, what is disposed thereon is LTEFDD systems, and the system disposes at least one on 2641MHz~2660MHz frequency bands Individual Microcell WAP.

At least one macro cell terminal is also included in the system, this terminal refers to there is nothing with the macrocell in first band The terminal of line link, the terminal supports LTE FDD wireless access technologys.Also, the macro cell terminal the 3rd frequency band of existing access On Microcell ability.

Macrocell monitoring unit in Microcell measures the signal intensity of macro cell terminal in the upstream band of macrocell Or signal power.In the present embodiment, second band is to be located at the frequency band in the range of 2570MHz~2590MHz.In Microcell Macrocell monitoring unit comprising one support LTE wireless access technology specifications terminal-receiving passage, one support LTE base station The receiving channel of side wireless access technology.Wherein, the terminal-receiving passage for supporting LTE wireless access technology specifications is a LTE Terminal receiver, the receiver is realized descending with macrocell in first band according to cell synchronous method as defined in LTE protocol The synchronization of radio frames, obtains the initial time of downlink radio frame, and the up nothing of macrocell being further inferred in first band The initial time of line frame.The Measurement bandwidth of the terminal-receiving passage over a second frequency band is assigned by network side, refers specifically to match somebody with somebody mode It is following one kind：

The cell broadcast information in first band is read, the width of first band is therefrom obtained；

Obtained from the down channel of the WAP in second band, or from the WAP in second band Return pass is obtained.

In the present embodiment, network side is sent to macrocell by the return pass of Microcell WAP to Microcell The measurement control order of up-link wireless frame, is the one or more of the measurement specified measurement parameter of Microcell：Measurement window Time-frequency location；Metering system；Measurement result reporting schemes.

Network side starts macro cell terminal and Microcell is measured, specifically according to the measurement result to macro cell terminal Method is：

The measurement result of one macro cell terminal and macrocell are started measurement thresholding and are compared by sub-step 1, network side, Result is that the radio-frequency power for the macro cell terminal that Microcell is measured is more than measurement decision threshold, then starts the macrocell whole The measurement of the down control channel of the Microcell to reporting the measurement result is held, here, the down control channel of measurement is public Pilot channel；

Sub-step 2, measurement result is reported network side by macro cell terminal；

Sub-step 3, Microcell signal power or signal intensity that network side is measured according to macro cell terminal, according to following step Suddenly make a decision：

Choose the signal power or signal intensity and the second descending decision threshold of a Microcell of macro cell terminal measurement It is compared, if greater than the second descending decision threshold, then the terminal is judged to by the strong descending out-of-band radiation interference in Microcell Macro cell terminal, otherwise, carry out the judgement of spatial reuse descending out-of-band radiation interference and insulation frequency band candidate terminal：

Specifically decision method is：Microcell signal power or signal intensity that the macro cell terminal is measured and second descending Out-of-band radiation interference space isolation decision threshold is compared, and is adjudicated if less than the second descending out-of-band radiation interference space isolation Thresholding, also, its current down channel configuration is in the macrocell downstream bands outside descending adjacent frequency interference and insulation frequency band, just The terminal is judged to the descending adjacent frequency interference and insulation frequency band candidate terminal of spatial reuse.

After above-mentioned judgement is completed, network side is by by the macro cell terminal of the strong descending out-of-band radiation interference in Microcell Down channel configure on the second descending sub-band of first band, the first descending sub-band be located at the second descending sub-band with Sub-band between 3rd frequency band, in the present embodiment, the bandwidth of the first descending sub-band is 10MHz, outside descending band here Radiation interference isolation frequency band is a bandwidth being made up of one group of OFDM resource block with a width of 10MHz.

Network side configures the down channel of the descending adjacent frequency interference and insulation frequency band candidate terminal of spatial reuse in first band The first descending sub-band on, that is, configure one group included in the descending out-of-band radiation interference and insulation frequency band with a width of 10MHz On OFDM resource blocks.Although the descending out-of-band radiation interference and insulation frequency band with a width of 10MHz is adjacent with the 3rd frequency band of Microcell, But, due to can wirelessly be connect with Microcell with candidate's macro cell terminal of the descending out-of-band radiation interference and insulation frequency band of spatial reuse There is big propagation path loss between access point, so the band external leakage work(of the Microcell access point launch channel on the 3rd frequency band Rate will not produce interference to the macro cell terminal.

In the present embodiment, macrocell monitoring unit is according to the Sounding Reference Signal resource assigned for macro cell terminal Position, receives the Sounding Reference Signal of LTE macro cell terminals transmitting on corresponding running time-frequency resource position；Further, According to the Sounding Reference Signal received, estimate Sounding Reference Signal reach at the WAP of Microcell as The one or more of lower parameter：

1) channel impulse response between macro cell terminal transmission signal and macrocell monitoring unit；

2) radio-frequency power or signal intensity of macro cell terminal transmission signal；

3) distribution of the radio-frequency power or signal intensity of macro cell terminal transmission signal in frequency domain.

It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase Mutually it is combined.

Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence Various corresponding changes and deformation, but these corresponding changes and deformation can be made according to the present invention by knowing those skilled in the art The protection domain of appended claims of the invention should all be belonged to.

One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read-only storage, disk or CD Deng.Alternatively, all or part of step of above-described embodiment can also use one or more integrated circuits to realize.Accordingly Each module/unit in ground, above-described embodiment can be realized in the form of hardware, it would however also be possible to employ the shape of software function module Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.

Claims

1. a kind of method that reduction Microcell is disturbed the descending out-of-band radiation of macro cell terminal, wherein,

Microcell determines the running time-frequency resource position that the up channel of macro cell terminal over a second frequency band is used, in time-frequency money Radio-frequency power or RF signal strength that the macro cell terminal transmission signal reaches the Microcell are measured on source position, to The identification information of network side report measurement results and/or the macro cell terminal；

The content that network side is reported using the Microcell is determined by the grand small of the strong descending out-of-band radiation interference in the Microcell Area's terminal, is assigned descending outside the first descending out-of-band radiation interference and insulation frequency band for the macro cell terminal on the first band of frequencies Channel resource, and/or Microcell WAP the 3rd descending out-of-band radiation of assignment for the Microcell on a third band Down channel resources outside interference and insulation frequency band；

Wherein, first band is the downstream bands of the macrocell, and the 3rd frequency band is the downstream bands of the Microcell, the first frequency Band and the 3rd frequency band be adjacent frequency band or exist in the middle of first band and the 3rd frequency band one not by macro cell terminal and/ Or the 5th frequency band that Microcell terminal is used；

First band includes adjacent the first descending sub-band and the second descending sub-band, the first descending sub-band and the 3rd frequency band Or it is adjacent with the 5th frequency band；First descending out-of-band radiation isolation frequency band is the sub-band of the first descending sub-band and with the 3rd Frequency band is adjacent with the 5th frequency band；

3rd frequency band includes adjacent the first descending sub-band and the second descending sub-band, the first descending sub-band and first band Or it is adjacent with the 5th frequency band；3rd descending out-of-band radiation isolation frequency band is the sub-band of the first descending sub-band and with first Frequency band is adjacent with the 5th frequency band；

It is determined that the mode for the macro cell terminal disturbed by the strong descending out-of-band radiation in the Microcell is one kind in the following manner：

One, judge to be more than the measurement result of macro cell terminal transmission signal the first descending decision threshold and the macrocell is whole When the down channel at end is configured on the first descending sub-band that the first band is included, by this macro cell terminal be defined as by To the macro cell terminal of the strong descending out-of-band radiation interference in the Microcell；

Two, when judging that being more than macrocell to the measurement result of macro cell terminal transmission signal starts measurement thresholding, start described grand Measurement of the cell terminal to the downlink signal of the Microcell, judges the Microcell transmitting that macro cell terminal is measured The radio-frequency power or RF signal strength of signal are more than the second descending decision threshold and the descending letter of the macro cell terminal When road configuration is on the first descending sub-band that the first band is included, this macro cell terminal is defined as by described small The macro cell terminal of the descending out-of-band radiation interference of Qu Qiang；

Three, when judging that being more than macrocell to the measurement result of macro cell terminal transmission signal starts measurement thresholding, start described grand Measurement of the cell terminal to the downlink signal of the Microcell, judges under the Microcell that macro cell terminal is measured The leakage power of row transmission signal on the first band of frequencies is more than the descending of the 3rd descending decision threshold and the macro cell terminal When channel configuration is on the first descending sub-band that the first band is included, this macro cell terminal is defined as by described micro- The macro cell terminal of the strong descending out-of-band radiation interference of cell.

2. the method as described in claim 1, it is characterised in that

The content that network side is reported using the Microcell is determined to use the first descending out-of-band radiation with spatial multiplexing mode Candidate's macro cell terminal of interference and insulation frequency band, is that the candidate is grand on the described first descending out-of-band radiation interference and insulation frequency band Cell terminal assigns down channel resources；

It is determined in the way of candidate macro cell terminal of the spatial multiplexing mode using descending out-of-band radiation interference and insulation frequency band It is one kind in the following manner：

One, judge that being less than or equal to the first descending out-of-band radiation space isolation to the measurement result of macro cell terminal transmission signal sentences Under certainly thresholding and the configuration of the down channel of the macro cell terminal are outside the first descending out-of-band radiation interference and insulation frequency band When on line frequency band, determine that this macro cell terminal can use descending out-of-band radiation interference and insulation frequency band with spatial multiplexing mode Candidate's macro cell terminal；

Two, when judging that being more than macrocell to the measurement result of macro cell terminal transmission signal starts measurement thresholding, start described grand Measurement of the cell terminal to the downlink signal of the Microcell, judge the Microcell transmission signal radio-frequency power or RF signal strength is less than or equal under the first descending out-of-band radiation space isolation decision threshold and the macro cell terminal When row channel configuration is on the first descending sub-band that the first band is included, determining that this macro cell terminal is can be with space Multiplex mode uses candidate's macro cell terminal of descending out-of-band radiation interference and insulation frequency band.

3. the method as described in claim 1, it is characterised in that

During the mode for determining the running time-frequency resource position that the up channel of macro cell terminal over a second frequency band is used is following manner One kind：

One, macrocell WAP is intercepted and captured on interface in the air and is sent to the uplink channel resources of macro cell terminal with confidence Breath, knows the running time-frequency resource position that the up channel of the macro cell terminal is used from the uplink channel resources configuration information Put；

Two, resource assignment information of the macrocell scheduler to macro cell terminal is obtained in network side, from the resource assignment information In know the running time-frequency resource position that the up channel of the macro cell terminal is used；

Three, the identification information and macro cell terminal for obtaining the Sounding Reference Signal that macro cell terminal is sent send channel spy Survey the running time-frequency resource information of reference signal.

4. the method as described in claim 1, it is characterised in that

The macro cell terminal transmission signal is one kind in signals below：

The Sounding Reference Signal that the macro cell terminal is sent.

5. the system that a kind of reduction Microcell is disturbed the descending out-of-band radiation of macro cell terminal, it is characterised in that

The system includes macrocell monitoring unit, monitoring result reporting unit, out-of-band radiation interference coordination unit；First band For the downstream bands of the macrocell, the 3rd frequency band is the downstream bands of the Microcell, and first band is phase with the 3rd frequency band Adjacent frequency band is not used in the presence of one in the middle of first band with the 3rd frequency band by macro cell terminal and/or Microcell terminal The 5th frequency band；First band include adjacent the first descending sub-band and the second descending sub-band, the first descending sub-band with 3rd frequency band is adjacent with the 5th frequency band；First descending out-of-band radiation isolation frequency band be the sub-band of the first descending sub-band simultaneously And with the 3rd frequency band or adjacent with the 5th frequency band；3rd frequency band includes the descending son frequency of the first adjacent descending sub-band and second Band, the first descending sub-band is with first band or adjacent with the 5th frequency band；3rd descending out-of-band radiation isolation frequency band is first The sub-band of descending sub-band and with first band or adjacent with the 5th frequency band；

Macrocell monitoring unit, the running time-frequency resource position used for the up channel in macro cell terminal over a second frequency band Measure radio-frequency power or RF signal strength that the macro cell terminal transmission signal reaches the Microcell；

Monitoring result reporting unit, for the identification information to network side report measurement results and/or the macro cell terminal；

Out-of-band radiation interference coordination unit, the content for being reported according to monitoring result reporting unit is determined by the Microcell The macro cell terminal of strong descending out-of-band radiation interference, assigns spoke outside the first descending band for the macro cell terminal on the first band of frequencies The down channel resources penetrated outside interference and insulation frequency band, and/or wirelessly connect for the Microcell of the Microcell on a third band Access point assigns the down channel resources outside the 3rd descending out-of-band radiation interference and insulation frequency band；

Out-of-band radiation interference coordination unit, a kind of determination in being additionally operable in the following manner is by the strong descending band in the Microcell The macro cell terminal of external radiation interference：

6. system as claimed in claim 5, it is characterised in that

The out-of-band radiation interference coordination unit, is also used for the content that the Microcell reports and is determined to spatial reuse Mode uses candidate's macro cell terminal of the first descending out-of-band radiation interference and insulation frequency band, dry in the described first descending out-of-band radiation It is candidate's macro cell terminal assignment down channel resources to disturb on isolation frequency band；

Out-of-band radiation interference coordination unit, one kind in being additionally operable in the following manner is determined to use with spatial multiplexing mode Candidate's macro cell terminal of descending out-of-band radiation interference and insulation frequency band：

7. system as claimed in claim 5, it is characterised in that

Macrocell monitoring unit includes the radio frequency reception channel of frequency band where bandwidth chahnel covers macro cell terminal launch channel, grand District monitoring unit, monitoring result reporting unit and the same cell deployment of Microcell WAP, three belong to same physics dress Put or adhere to separately different physical units.

8. system as claimed in claim 5, it is characterised in that

Two, when judging that being more than macrocell to the measurement result of macro cell terminal transmission signal starts measurement thresholding, start described grand Measurement of the cell terminal to the downlink signal of the Microcell, judge the Microcell transmission signal radio-frequency power or RF signal strength, which is less than or equal to, is more than the first descending out-of-band radiation space isolation decision threshold and the macro cell terminal Down channel when configuring on the first descending sub-band that the first band is included, determining that this macro cell terminal is can be with Spatial multiplexing mode uses candidate's macro cell terminal of descending out-of-band radiation interference and insulation frequency band.