CN102892121A

CN102892121A - Method and system for lowering downlink out-of-band radiated interference of micro cell to macro cell terminal

Info

Publication number: CN102892121A
Application number: CN2011102072689A
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: 2013-01-23
Anticipated expiration: 2031-07-22
Also published as: CN102892121B

Abstract

The invention discloses a method and a system for lowering descending out-of-band radiated interference of a micro cell to a macro cell terminal. The method comprises the following steps: a micro cell determines the time-frequency sources position used by an uplink channel of a macro cell terminal on a second frequency band; the radio frequency power or the radio frequency signal intensity of signals emitted by the macro cell terminal to the micro cell is measured on the time frequency position, and the measurement result and/or recognition information of the macro cell terminal are/is reported to a network side; the network side determines the macro cell terminal suffering from strong downlink out-of-band radiated interference of the micro cell by utilizing the content reported by the micro cell, and assigns downlink channel resources out of a first downlink out-of-band radiated interference isolation frequency band for the macro cell terminal on the first frequency band, and/or assigns downlink channel resources out of a third downlink out-of-band radiated interference isolation frequency band for micro cell wireless switched points of the micro cell on a third frequency band. According to the scheme, the out-of-band radiated interference of the macro cell terminal subjected to the micro cell strong interference of micro cell wireless switched points can be lowered.

Description

Reduce the method and system that Microcell disturbs the descending out-of-band radiation of macrocell terminal

Technical field

The present invention relates to wireless communication field, relate in particular to and reduce the method and system that Microcell disturbs the descending out-of-band radiation of macrocell terminal.

Background technology

In order to increase power system capacity, improve flexibility and frequency spectrum service efficiency that frequency spectrum uses, adopt more and more macrocell to cover with Microcell in the wireless access network and cover the networking mode that combines.In the real network of some operators, Home eNodeB or microcell base station are applied, in standard is discussed, third generation partner program (3rd Generation Partnership Project, be 3GPP) Long Term Evolution (Long Term Evolution, be called for short LTE) also digital repeater (RELAY) technology and household base station technology have been carried out interim discussion in the system, the standardization of the heterogeneous network (HetNet) that is comprised of Microcell and macrocell also receives the concern of vast operator and equipment vendor in 3GPP.

In the heterogeneous network of macrocell and Microcell composition, when Microcell WAP (wireless access point) and macrocell WAP (wireless access point) are operated on the nearby frequency bands, whether the terminal that network side need to be determined macrocell WAP (wireless access point) service and exist out-of-band radiation to disturb or be referred to as neck between the Microcell WAP (wireless access point) and frequently disturb and is considered how to control this out-of-band radiation and is disturbed.The out-of-band radiation interference problem is at third generation partner program (3rd Generation Partnership Project, be 3GPP) in obtain discussing, Long Term Evolution (the Long Term Evolution that application scenarios is 700MHz frequency band deploy, abbreviation LTE) base station is to the interference of the ground TV broadcast channel of adjacent frequency band deployment, and solution is to adopt the filter of lower adjacent frequency band leakage power (improving ACLR).

In the prior art, a kind of as follows to the transmit method measuring and process of terminal:

Application number is 96195253.9, publication number is CN96195253, denomination of invention provides and a kind ofly terminal is issued other base station signal intercepts and captures the method for measurement and comprise for the patent of the test transceiver of cell planning " be used for " is called file 1: have the cellular communication system of a plurality of Serving cells, each Serving cell is by at least one service in a plurality of existing base stations, and a kind of method of definite new little base station antenna positions comprises the steps: to provide a test antenna at the test position place of a Serving cell; In a predetermined amount of time, carry out a monitoring process, comprise the steps: in test antenna, to receive from mobile radio station to the up link access attempts signal that has a desired emission the base station now; Measure the signal strength signal intensity of the up link access attempts signal that receives; Measured signal strength signal intensity is compared with predetermined threshold level; And, if measured signal strength signal intensity greater than predetermined threshold level, count value just increases progressively so; And after monitoring process finishes, count value is compared with predetermined count value, and if count value greater than predetermined count value, so just set up new little base station at this test position.

A kind of technology of sharing frequency spectrum between macrocell and Microcell is as follows:

Publication number be US20100099431 (A1) denomination of invention for " sharing frequency spectrum at macrocell and Microcell implements the United States Patent (USP) of the method and system (Method and system for interference management in a spectrum shared by WAN and FEMTO cells) of interference management and is called the method that file 2 provides and comprises the steps: 1) detection is positioned at picocell coverage area and is linked into the terminal of macrocell; 2) intercept and capture the control signal that the macrocell radio node is issued the terminal that is linked into this macrocell; 3) utilize at least in part the information that comprises in the described control signal, determine employed the first frequency spectrum resource of macrocell and communicating by letter of macrocell terminal room; 4) at least in part according to described the first frequency spectrum resource, determine the second frequency spectrum resource that the Microcell terminal is used.Described intercepting and capturing macrocell radio node is issued the control signal of the terminal that is linked into this macrocell, further comprises from the macrocell terminal receiving some information, is beneficial to the intercepting and capturing to described control information; Further, comprise reception C-RNTI (Cell Radio Network Temporary Identifier) and MAC ID (Media Access Control Identifier).Further, described control information comprises the broadcast message that the macrocell radio node sends, ACK/NAC information; Described definite, comprise up or/and the configuration of downlink bandwidth.

It is a kind of that to suppress the adjacent method of frequently disturbing as follows:

Application number is 201010109066.6, and publication number is CN101834628A, and denomination of invention for the patent of " a kind of adjacent frequently disturbance restraining method and device " is called the method that file 3 provides is: detect to receive in the signal whether comprise adjacent frequency interference signal; When in receiving signal, comprising adjacent frequency interference signal, detect adjacent frequency interference signal frequency spectrum and be the Left or right at the useful signal frequency spectrum; When the left side of adjacent frequency interference signal frequency spectrum at useful signal, then select output to carry out to received signal the monolateral filtered signal in the right side, when the right at useful signal of adjacent frequency interference signal frequency spectrum, then select output to carry out to received signal the monolateral filtered signal in a left side.Whether to comprise adjacent frequency interference signal and adjacent frequency interference signal frequency spectrum in the signal be Left or right at the useful signal frequency spectrum to the embodiment of the invention by detect receiving, and according to testing result, select the monolateral filtered signal of output, realized the neighbour is disturbed the accuracy that suppresses frequently, and do not affected sensitivity behaviour.

To the prior art aspect that the macrocell terminal transmits and measures, do not provide in the above-mentioned file 1 and how to reduce the Microcell WAP (wireless access point) to the adjacent method of frequently disturbing of macrocell terminal.

Between macrocell and Microcell, share aspect the frequency spectrum, provided in the above-mentioned file 2 and utilized macro base station to send to the information that comprises in the control command of macrocell terminal to come method for Microcell terminal distribution resource, comprise the method that realizes spatial reuse macrocell resource between Microcell terminal and the macrocell terminal, but, do not give the adjacent method frequently disturbed of control Microcell WAP (wireless access point) transmission channel to the macrocell terminal.

Aspect the adjacent frequently interference of inhibition, above-mentioned file 3 has provided the method that a kind of terminal suppresses adjacent band interference, is directed to the monolateral filtering signal of output, and needs the new filter of introducing in the terminal, has increased the complexity of terminal.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of method and system that Microcell disturbs the descending out-of-band radiation of macrocell terminal that reduce, and reduces the Microcell WAP (wireless access point) by out-of-band radiation interference and insulation frequency band the out-of-band radiation that is subject to the strongly disturbing macrocell terminal of this Microcell is disturbed.

In order to solve the problems of the technologies described above, the invention provides a kind of method that Microcell disturbs the descending out-of-band radiation of macrocell terminal that reduces, wherein,

Microcell is determined the running time-frequency resource position that the up channel of macrocell terminal on the second frequency band uses, measure described macrocell terminal in described time-frequency position and transmit and arrive radio-frequency power or the radio-frequency (RF) signal strength of described Microcell, to the identifying information of network side reporting measurement result and/or described macrocell terminal;

The content that network side uses described Microcell to report determines to be subject to the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs, be down channel resources outside described macrocell terminal assignments the first descending out-of-band radiation interference and insulation frequency band at the first frequency band, and/or be the down channel resources outside Microcell WAP (wireless access point) assignment the 3rd descending out-of-band radiation interference and insulation frequency band of described Microcell at the 3rd frequency band;

Wherein, the first frequency band is the downstream bands of described macrocell, the 3rd frequency band is the downstream bands of described Microcell, and the first frequency band and the 3rd frequency band are adjacent frequency bands or have one not by the 5th frequency band of macrocell terminal and/or the use of Microcell terminal in the middle of the first frequency band and the 3rd frequency band;

The first frequency band comprises the first adjacent descending 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; The sub-band that the first descending out-of-band radiation isolate bands is the first descending sub-band and with the 3rd frequency band or adjacent with the 5th frequency band;

The 3rd frequency band comprises the first adjacent descending sub-band and the second descending sub-band, the first descending sub-band and the first frequency band or adjacent with the 5th frequency band; The sub-band that the 3rd descending out-of-band radiation isolate bands is the first descending sub-band and with the first frequency band or adjacent with the 5th frequency band.

Further, said method can also have following characteristics:

The content that network side uses described Microcell to report determines to use with spatial multiplexing mode candidate's macrocell terminal of the first descending out-of-band radiation interference and insulation frequency band, is described candidate's macrocell terminal assignments down channel resources at the described first descending out-of-band radiation interference and insulation frequency band.

Further, said method can also have following characteristics:

The mode of determining the running time-frequency resource position that the up channel of macrocell terminal on the second frequency band uses is a kind of in the following mode:

One, intercept and capture the uplink channel resources configuration information that the macrocell WAP (wireless access point) sends to the macrocell terminal aloft on the interface, from described ascending resource configuration information, know the running time-frequency resource position of the up channel use of described macrocell terminal; Perhaps;

Two, obtain the macrocell scheduler to the resource assignment information of macrocell terminal at network side, from described resource assignment information, know the running time-frequency resource position of the up channel use of described macrocell terminal;

Three, obtain the identification information of the Sounding Reference Signal that the macrocell terminal sends and the running time-frequency resource information of macrocell terminal transmitting channel detection reference signal.

Further, said method can also have following characteristics:

The mode of determining to be subject to the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs is a kind of in the following mode:

One, when the measurement result that judgement transmits to the macrocell terminal is configured on the first descending sub-band that described the first frequency band comprises greater than the down channel of the first descending decision threshold and described macrocell terminal, this macrocell terminal is defined as being subject to the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs;

Two, when the measurement result that judgement transmits to the macrocell terminal starts the measurement thresholding greater than macrocell, start described macrocell terminal to the measurement of the downlink signal of described Microcell, judge when radio-frequency power that described Microcell that the macrocell terminal measures transmits or radio-frequency (RF) signal strength are configured on the first descending sub-band that described the first frequency band comprises greater than the down channel of the second descending decision threshold and described macrocell terminal, this macrocell terminal is defined as being subject to the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs;

Three, when the measurement result that judgement transmits to the macrocell terminal starts the measurement thresholding greater than macrocell, start described macrocell terminal to the measurement of the downlink signal of described Microcell, when the leakage power of downlink signal on the first frequency band of judging the described Microcell that the macrocell terminal measures is configured on the first descending sub-band that described the first frequency band comprises greater than the down channel of the 3rd descending decision threshold and described macrocell terminal, this macrocell terminal is defined as being subject to the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs.

Further, said method can also have following characteristics:

Determine that can use the mode of candidate's macrocell terminal of descending out-of-band radiation interference and insulation frequency band with spatial multiplexing mode is a kind of in the following mode:

One, when the down channel that the measurement result that judgement transmits to the macrocell terminal is less than or equal to the first descending out-of-band radiation space isolation decision threshold and described macrocell terminal is configured on the downstream bands outside the first descending out-of-band radiation interference and insulation frequency band, determine that this macrocell terminal is to use with spatial multiplexing mode candidate's macrocell terminal of descending out-of-band radiation interference and insulation frequency band;

Two, when the measurement result that judgement transmits to the macrocell terminal starts the measurement thresholding greater than macrocell, start described macrocell terminal to the measurement of the downlink signal of described Microcell, judge when radio-frequency power that described Microcell transmits or radio-frequency (RF) signal strength are less than or equal to down channel greater than the first descending out-of-band radiation space isolation decision threshold and described macrocell terminal and are configured on the first descending sub-band that described the first frequency band comprises, determine that this macrocell terminal is to use with spatial multiplexing mode candidate's macrocell terminal of descending out-of-band radiation interference and insulation frequency band.

Further, said method can also have following characteristics:

It is a kind of in the following signal that described macrocell terminal transmits:

The business datum signal that described macrocell terminal is launched at reverse link traffic channel;

The control signal that described macrocell terminal sends at ascending control channel;

The Sounding Reference Signal that described macrocell terminal sends.

In order to solve the problems of the technologies described above, the invention provides a kind of system that Microcell disturbs the descending out-of-band radiation of macrocell terminal that reduces, described system comprises the macrocell monitoring means, monitoring result reports the unit, out-of-band radiation interference coordination unit; The first frequency band is the downstream bands of described macrocell, the 3rd frequency band is the downstream bands of described Microcell, and the first frequency band and the 3rd frequency band are adjacent frequency bands or have one not by the 5th frequency band of macrocell terminal and/or the use of Microcell terminal in the middle of the first frequency band and the 3rd frequency band; The first frequency band comprises the first adjacent descending 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; The sub-band that the first descending out-of-band radiation isolate bands is the first descending sub-band and with the 3rd frequency band or adjacent with the 5th frequency band; The 3rd frequency band comprises the first adjacent descending sub-band and the second descending sub-band, the first descending sub-band and the first frequency band or adjacent with the 5th frequency band; The sub-band that the 3rd descending out-of-band radiation isolate bands is the first descending sub-band and with the first frequency band or adjacent with the 5th frequency band;

The macrocell monitoring means is used for measuring in the running time-frequency resource position that the up channel of macrocell terminal on the second frequency band uses described macrocell terminal and transmits and arrive radio-frequency power or the radio-frequency (RF) signal strength of described Microcell;

Monitoring result reports the unit, is used for the identifying information to network side reporting measurement result and/or described macrocell terminal;

Out-of-band radiation interference coordination unit, be used for determining to be subject to the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs according to the content that monitoring result reports the unit to report, be down channel resources outside described macrocell terminal assignments the first descending out-of-band radiation interference and insulation frequency band at the first frequency band, and/or be the down channel resources outside Microcell WAP (wireless access point) assignment the 3rd descending out-of-band radiation interference and insulation frequency band of described Microcell at the 3rd frequency band.

Further, said system can also have following characteristics:

Described out-of-band radiation interference coordination unit, also determining to use with spatial multiplexing mode candidate's macrocell terminal of the first descending out-of-band radiation interference and insulation frequency band for the content of using described Microcell to report, is described candidate's macrocell terminal assignments down channel resources at the described first descending out-of-band radiation interference and insulation frequency band.

Further, said system can also have following characteristics:

The macrocell monitoring means comprises that bandwidth chahnel covers the radio frequency reception channel of macrocell terminal emission channel place frequency band, macrocell monitoring means, monitoring result report unit and the same cell deployment of Microcell WAP (wireless access point), and the three belongs to the Same Physical device or adheres to different physical units separately.

Further, said system can also have following characteristics:

Out-of-band radiation interference coordination unit also is used for a kind of macrocell terminal of determining to be subject to the strong descending out-of-band radiation interference of described Microcell in the following manner:

Further, said system can also have following characteristics:

Out-of-band radiation interference coordination unit also is used for a kind of candidate's macrocell terminal of determining to use with spatial multiplexing mode descending out-of-band radiation interference and insulation frequency band in the following manner:

Such scheme can reduce the Microcell WAP (wireless access point) by out-of-band radiation interference and insulation frequency band to be disturbed the out-of-band radiation that is subject to the strongly disturbing macrocell terminal of this Microcell, by utilizing the space isolation to realize being subjected to the macrocell terminal of Microcell weak jamming to the utilization of out-of-band radiation interference and insulation frequency band, improve the service efficiency of macrocell WAP (wireless access point) frequency spectrum again.

Description of drawings

Fig. 1 reduces the method schematic diagram that Microcell disturbs the descending out-of-band radiation of macrocell terminal;

Fig. 2 reduces the method schematic diagram that Microcell disturbs the descending out-of-band radiation of macrocell terminal in the specific embodiment.

Embodiment

Reduce Microcell the system that the descending out-of-band radiation of macrocell terminal disturbs is comprised the macrocell monitoring means, monitoring result reports the unit, out-of-band radiation interference coordination unit; The first frequency band is the downstream bands of described macrocell, the 3rd frequency band is the downstream bands of described Microcell, and the first frequency band and the 3rd frequency band are adjacent frequency bands or have one not by the 5th frequency band of macrocell terminal and/or the use of Microcell terminal in the middle of the first frequency band and the 3rd frequency band; The first frequency band comprises the first adjacent descending 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; The sub-band that the first descending out-of-band radiation isolate bands is the first descending sub-band and with the 3rd frequency band or adjacent with the 5th frequency band; The 3rd frequency band comprises the first adjacent descending sub-band and the second descending sub-band, the first descending sub-band and the first frequency band or adjacent with the 5th frequency band; The sub-band that the 3rd descending out-of-band radiation isolate bands is the first descending sub-band and with the first frequency band or adjacent with the 5th frequency band.

The macrocell monitoring means is used for measuring in the running time-frequency resource position that the up channel of macrocell terminal on the second frequency band uses described macrocell terminal and transmits and arrive radio-frequency power or the radio-frequency (RF) signal strength of described Microcell.

Monitoring result reports the unit, is used for the identifying information to network side reporting measurement result and/or described macrocell terminal.

Such scheme can reduce the Microcell WAP (wireless access point) by out-of-band radiation interference and insulation frequency band to be disturbed the out-of-band radiation that is subject to the strongly disturbing macrocell terminal of this Microcell.

Generally speaking, the macrocell WAP (wireless access point) uses the first frequency band as its downstream bands, uses the second frequency band as its upstream band; Described Microcell WAP (wireless access point) uses the 3rd frequency band as its downstream bands, uses the 4th frequency band as its upstream band.

Candidate's macrocell terminal of the first descending out-of-band radiation interference and insulation frequency band is also determined to use with spatial multiplexing mode in out-of-band radiation interference coordination unit for the content of using described Microcell to report, be described candidate's macrocell terminal assignments down channel resources at the described first descending out-of-band radiation interference and insulation frequency band.

Such scheme can be realized being subjected to the macrocell terminal of Microcell weak jamming to the utilization of out-of-band radiation interference and insulation frequency band by utilizing the space isolation, improves the service efficiency of macrocell WAP (wireless access point) frequency spectrum.

Out-of-band radiation interference coordination unit also is used for determining to be subject to the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs, and candidate's macrocell terminal of determining to use with spatial multiplexing mode descending out-of-band radiation interference and insulation frequency band.

Wherein, the macrocell monitoring means comprises that bandwidth chahnel covers the radio frequency reception channel of macrocell terminal emission channel place frequency band, macrocell monitoring means, monitoring result report unit and the same cell deployment of Microcell WAP (wireless access point), and the three belongs to the Same Physical device or adheres to different physical units separately.The macrocell monitoring means comprises the receive path that is operated on the first frequency band, receives the Downlink Control Information that macrocell issues at the first frequency band, and described Downlink Control Information refers to the information into macrocell terminal assignments uplink channel resources.The macrocell monitoring means comprises the receive path that is operated on the second frequency band, and transmitting in the second frequency band reception macrocell terminal arrives signal strength signal intensity or the signal power at Microcell WAP (wireless access point) place.

As shown in Figure 1, reducing Microcell comprises the method that the descending out-of-band radiation of macrocell terminal disturbs:

Said method can reduce the Microcell WAP (wireless access point) by out-of-band radiation interference and insulation frequency band to be disturbed the out-of-band radiation that is subject to the strongly disturbing macrocell terminal of this Microcell.

The described macrocell terminal of measurement of the present invention transmits and arrives radio-frequency power or the radio-frequency (RF) signal strength of described Microcell, and it is a kind of in the following signal that wherein said macrocell terminal transmits:

The Sounding Reference Signal that described macrocell terminal sends (Sounding Reference Signal is called for short SRS).

Said method also comprises: the content that network side uses described Microcell to report determines to use with spatial multiplexing mode candidate's macrocell terminal of the first descending out-of-band radiation interference and insulation frequency band, is described candidate's macrocell terminal assignments down channel resources at the described first descending out-of-band radiation interference and insulation frequency band.Described candidate's macrocell terminal be down channel be configured in outside the descending out-of-band radiation interference and insulation band and and the Microcell WAP (wireless access point) between have the macrocell terminal of large propagation path loss, can be with reference to measure or the standard thresholding that counts when judging propagation path loss, and the propagation path loss between the Microcell WAP (wireless access point) is greater than this standard gate in limited time, be called and the Microcell WAP (wireless access point) between have large propagation path loss.

An effect of candidate's macrocell terminal is: be used for being implemented in the load balancing between the macrocell frequency band outside descending out-of-band radiation interference and insulation frequency band and the descending out-of-band radiation interference and insulation frequency band.Such scheme can be realized being subjected to the macrocell terminal of Microcell weak jamming to the utilization of out-of-band radiation interference and insulation frequency band by utilizing the space isolation, improves the service efficiency of macrocell WAP (wireless access point) frequency spectrum.

Can according to the Microcell transmission channel determine the width of descending out-of-band radiation interference and insulation frequency band with external leakage power parameter and out-of-band radiation interference protection ratio parameter, the value of the width of descending out-of-band radiation interference and insulation frequency band is following a kind of: 1) predetermined fixed-bandwidth value; 2) one or more bandwidth value of determining in conjunction with the in-situ power measurement result.

From the foregoing description mode as can be known, determine to be subject to the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs and when determining to use candidate's macrocell terminal of descending out-of-band radiation interference and insulation frequency band with spatial multiplexing mode, can determine according to the measurement result to the macrocell terminal that Microcell reports, the measurement result to the macrocell terminal that also can report according to Microcell, start the macrocell terminal Microcell is measured, determine according to the measurement result of macrocell terminal.Startup macrocell terminal comprises the method for the measurement of Microcell: network side sends the parameter that is used for access Microcell down channel to the macrocell terminal, comprises one or more of following parameter: 1) the downlink frequency indication parameter of Microcell WAP (wireless access point); 2) identification parameter of Microcell WAP (wireless access point); 3) the measured channel classification of Microcell WAP (wireless access point); 4) the wireless access technology indication parameter of Microcell WAP (wireless access point) employing.

It is as follows to carry out concrete example:

Determine to be subject to the macrocell terminal of the strong descending out-of-band radiation interference of described Microcell and to determine and can use an exemplary method of candidate's macrocell terminal of descending out-of-band radiation interference and insulation frequency band to comprise with spatial multiplexing mode according to the measurement result to the macrocell terminal that Microcell reports:

Judge one, the potential terminal judges that is disturbed: the signal power that the macrocell terminal is measured that Microcell is reported or signal strength signal intensity and the first descending decision threshold compare, if greater than the first descending decision threshold, then this terminal is judged to the potential terminal that is disturbed, otherwise, then this terminal is judged to the non-potential terminal that is disturbed; Perhaps, judge two.

Judge two, described macrocell terminal be judged to non-potential be disturbed terminal after, further, this terminal is carried out the judgement of the descending out-of-band radiation interference and insulation of spatial reuse frequency band candidate terminal.Particularly, the signal power that the macrocell terminal is measured that Microcell is reported or signal strength signal intensity and the first descending out-of-band radiation space isolation decision threshold compare, if less than the first descending out-of-band radiation space isolation decision threshold, and, the current down channel of macrocell terminal is configured on the macrocell downstream bands outside the descending out-of-band radiation interference and insulation frequency band, just this terminal is judged to the descending out-of-band radiation interference and insulation of spatial reuse 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 value of the first descending decision threshold.

According to the measurement result to the macrocell terminal, start and determine after the macrocell terminal is measured Microcell to be subject to the macrocell terminal of the strong descending out-of-band radiation interference of described Microcell and to determine and can use an exemplary method of candidate's macrocell terminal of descending out-of-band radiation interference and insulation frequency band to comprise with spatial multiplexing mode:

(1) network side compares measurement result and the macrocell startup measurement thresholding of a macrocell terminal, if starting greater than macrocell, the radio-frequency power of this macrocell terminal that Microcell measures measures thresholding, just start this macrocell terminal to the measurement of the down control channel of the Microcell that reports this measurement result, concrete down control channel is following a kind of: Common Pilot Channel; Broadcast channel; Synchronizing information.

(2) the macrocell terminal reports network side with measurement result.

(3) network side makes a decision in accordance with the following steps according to Microcell signal power or the signal strength signal intensity of the measurement of macrocell terminal:

The potential terminal judges that is disturbed: the Microcell signal power that the macrocell terminal is measured or signal strength signal intensity and the second descending decision threshold compare, if greater than the second descending decision threshold, then this terminal is judged to the potential terminal that is disturbed, otherwise, then this terminal is judged to the non-potential terminal that is disturbed.

Described macrocell terminal be judged to non-potential be disturbed terminal after, further, this terminal is carried out the judgement of the descending out-of-band radiation interference and insulation of spatial reuse frequency band candidate terminal.Particularly, the Microcell signal power that this macrocell terminal is measured or signal strength signal intensity are isolated decision threshold with the second descending out-of-band radiation space and are compared, if less than the second descending out-of-band radiation space isolation decision threshold, and, its current down channel is configured on the macrocell downstream bands outside the descending out-of-band radiation interference and insulation frequency band, just this terminal is judged to the descending out-of-band radiation interference and insulation of spatial reuse frequency band candidate terminal;

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

In the said method, the entity of judging can be that the Microcell side also can be network side.

When the entity of judging is the Microcell side, after the Microcell side is judged the macrocell terminal that is subject to the strong descending out-of-band radiation interference of described Microcell and can be used candidate's macrocell terminal of descending out-of-band radiation interference and insulation frequency band with spatial multiplexing mode, can only send the sign of corresponding terminal to network side, network side is directly known the macrocell terminal of determining according to sign.

When the entity of judging is network side, Microcell is to the identifying information of network side reporting measurement result and macrocell terminal, and network side is judged the macrocell terminal that is subject to the strong descending out-of-band radiation interference of described Microcell and the candidate's macrocell terminal that can use with spatial multiplexing mode descending out-of-band radiation interference and insulation frequency band according to measurement result.

Specific embodiment one

Application scenarios is for suppressing the OFDM Microcell to the out-of-band radiation interference of UMTS macrocell terminal.

In this specific embodiment one, what macrocell adopted is UMTS high-speed packet access (HSPA) technology, first frequency band (downstream bands) of macrocell HSPA system is the 10MHz bandwidth, disposed these two adjacent descending carriers of the first descending carrier and the second descending carrier thereon, the bandwidth of each carrier wave is 5MHz; Second frequency band (upstream band) of macrocell HSPA system is the 10MHz bandwidth, has disposed two the first and second adjacent up-link carriers thereon, and the bandwidth of each carrier wave is 5MHz; On three frequency band (downstream bands) adjacent with described the first frequency band, disposed the down channel that adopts the Microcell of LTE wireless access technology, the bandwidth of the downstream bands of Microcell WAP (wireless access point) (the 3rd frequency band) is 20MHz.

In this specific embodiment, described UMTS system and LTE system belong to same operator, allow the down control channel of Microcell measuring unit access macrocell, obtain relevant control information.

Also comprise at least one macrocell terminal in the native system, i.e. UMTS terminal, this terminal refer to that one exists the terminal of wireless link with macrocell, and this terminal is supported UMTS HSDPA wireless access technology at least.

Macrocell monitoring means in the Microcell receives the control command that the UMTS WAP (wireless access point) issues at the first frequency band that the HSDPA system uses, and control command described here is dispatching command, and dispatching command is macrocell terminal assignments uplink channel resources.And two descending carriers of this interference preventer on the first frequency band that the HSDPA system uses receive described control command.

Macrocell monitoring means in the Microcell is the uplink channel resources position of macrocell terminal assignments at the second frequency band according to its macrocell that receives at the first frequency band, the second frequency band that uses in the HSDPA system receives the signal of UMTS macrocell terminal emission, measures radio-frequency power or signal strength signal intensity that it arrives Microcell WAP (wireless access point) place.

Macrocell terminal and the candidate's macrocell terminal undetermined that the strong descending out-of-band radiation of described Microcell disturbs that be subject to undetermined determined in the out-of-band radiation interference coordination unit of Microcell, determine that mode is: the uplink transmission power of terminal is compared with reporting decision threshold one, uplink transmission power is judged to be the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs that is subject to undetermined greater than the terminal that reports decision threshold one, the uplink transmission power of terminal is compared with reporting decision threshold two, and uplink transmission power is judged to be candidate's macrocell terminal undetermined less than the terminal that reports decision threshold two.Report decision threshold two to be less than or equal to and report decision threshold one.

The monitoring result of Microcell reports the unit that sign and the corresponding uplink transmission power that is subject to the macrocell terminal of the strong descending out-of-band radiation interference of described Microcell undetermined is sent to network equipment, and/or sign and the corresponding uplink transmission power of candidate's macrocell terminal undetermined is sent to network side.

Network side from undetermined be subject to determining the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs be subject to the macrocell terminal that the strong descending out-of-band radiation of described Microcell disturbs, from candidate's macrocell terminal undetermined, determine candidate's macrocell terminal.Concrete recognition methods is as follows:

At first, judge 1, namely carry out the potential terminal judges that is disturbed: from one group of measurement result (namely the signal power or signal strength signal intensity to the macrocell terminal) that Microcell reports, according to order from big to small, choose one or several measurement results, disturb decision threshold one to compare with descending out-of-band radiation signal power or the signal strength signal intensity (being measurement result) choosing out, if disturb decision threshold greater than the first descending out-of-band radiation, then this terminal is judged to the potential terminal that is disturbed, and stops the further judgement to this terminal; Otherwise, then this terminal is judged to the non-potential terminal that is disturbed, and further does as judging:

Judge two, this terminal is carried out the judgement of the descending out-of-band radiation interference and insulation of spatial reuse frequency band candidate terminal.Particularly, the signal power that the macrocell terminal is measured that Microcell is reported or signal strength signal intensity and the first descending out-of-band radiation interference space isolation decision threshold compare, if less than descending out-of-band radiation interference space isolation decision threshold one, and, the current down channel of macrocell terminal is configured on the macrocell downstream bands outside the descending out-of-band radiation interference and insulation frequency band, just this terminal is judged to the descending out-of-band radiation interference and insulation of spatial reuse frequency band candidate terminal;

After finishing above-mentioned judgement, network side is configured in the potential down channel that is disturbed terminal on the second descending sub-band of the first frequency band, the first descending sub-band is the sub-band between the second descending sub-band and the 3rd frequency band, in the present embodiment, the bandwidth of the first descending sub-band is 5MHz, because the downlink radio frequency passage occupied bandwidth of UMTS is the 5MHz that determines, the width of the descending out-of-band radiation interference and insulation frequency band is here just got 5MHz.

Further, network side is configured in the down channel of the descending out-of-band radiation interference and insulation of spatial reuse frequency band candidate terminal on the first descending sub-band.Although the first descending sub-band is adjacent with the 3rd frequency band, owing to can have large propagation path loss with between candidate's macrocell terminal of the descending out-of-band radiation interference and insulation of spatial reuse frequency band and the Microcell WAP (wireless access point), so the band external leakage power of the emission of the Microcell access point on the 3rd frequency band channel can not produce interference to this macrocell terminal.

Specific embodiment two

Application scenarios is for suppressing the OFDM Microcell to the out-of-band radiation interference of OFDM macrocell terminal.

In the present embodiment, the downlink radio frequency passage of macrocell is configured in the first frequency band, and the up radio-frequency channel of macrocell is configured in the second frequency band; The downlink radio frequency passage of Microcell is configured in the 3rd frequency band, and the up radio-frequency channel of Microcell is configured in the 4th frequency band.Microcell and macrocell all adopt the same wireless access technology, and still, Microcell and macrocell can be a kind of of following combination on the duplex mode that system adopts:

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

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

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

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

In the present embodiment, adopt the 4th) plant system configuration mode, and Microcell and macrocell are the systems on the nearby frequency bands of being operated in that belongs to different operators.

Particularly, as shown in Figure 2, the first frequency band is 2621MHz～2640MHz frequency band, its deploy be LTE FDD system, the macrocell WAP (wireless access point) of this system has disposed a descending carrier in the 20MHz bandwidth; The 3rd frequency band is 2641MHz～2660MHz frequency band, its deploy be the LTEFDD system, this system is in 2641MHz～at least one Microcell WAP (wireless access point) of 2660MHz frequency band deploy.

Also comprise at least one macrocell terminal in the native system, this terminal refer to the first frequency band on macrocell have the terminal of wireless link, this terminal is supported LTE FDD wireless access technology.And, the ability of the Microcell on existing access the 3rd frequency band of this macrocell terminal.

Macrocell monitoring means in the Microcell is measured signal strength signal intensity or the signal power of macrocell terminal in the upstream band of macrocell.In the present embodiment, the second frequency band is the frequency band that is positioned at 2570MHz～2590MHz scope.Macrocell monitoring means in the Microcell comprises a terminal-receiving passage of supporting LTE wireless access technology standard, a receive path of supporting LTE base station side wireless access technology.Wherein, support that the terminal-receiving passage of LTE wireless access technology standard is a LTE terminal receiver, this receiver according to the cell synchronous method of LTE agreement regulation realize with the first frequency band on the macrocell downlink radio frame synchronously, obtain the zero-time of downlink radio frame, and further infer the zero-time of the macrocell up-link wireless frame on the first frequency band.The Measurement bandwidth of this terminal-receiving passage on the second frequency band be by the network side assignment, and concrete assignment mode is following a kind of:

Read the cell broadcast information on the first frequency band, therefrom obtain the width of the first frequency band;

The down channel of the WAP (wireless access point) from the second frequency band obtains, and perhaps the backhaul passage of the WAP (wireless access point) from the second frequency band obtains.

In the present embodiment, the backhaul passage of network side by the Microcell WAP (wireless access point) sends measurement control order to macrocell up-link wireless frame to Microcell, is one or more of the measurement specified measurement parameter of Microcell: the time-frequency position of measurement window; Metering system; Measurement result reports mode.

Network side starts the macrocell terminal Microcell is measured according to the measurement result to the macrocell terminal, and concrete grammar is:

Substep 1, network side compares measurement result and the macrocell startup measurement thresholding of a macrocell terminal, the result is that the radio-frequency power of this macrocell terminal of measuring of Microcell is greater than measuring decision threshold, so start this macrocell terminal to the measurement of the down control channel of the Microcell that reports this measurement result, here, the down control channel of measurement is Common Pilot Channel;

Substep 2, the macrocell terminal reports network side with measurement result;

Substep 3, Microcell signal power or signal strength signal intensity that network side is measured according to the macrocell terminal make a decision in accordance with the following steps:

Choosing the signal power of the Microcell that the macrocell terminal measures or signal strength signal intensity and the second descending decision threshold compares, if greater than the second descending decision threshold, then this terminal is judged to and is subject to the macrocell terminal that the strong descending out-of-band radiation of Microcell disturbs, otherwise, carry out the judgement of the descending out-of-band radiation interference and insulation of spatial reuse frequency band candidate terminal:

Concrete decision method is: the Microcell signal power that this macrocell terminal is measured or signal strength signal intensity are isolated decision threshold with the second descending out-of-band radiation interference space and are compared, if less than the second descending out-of-band radiation interference space isolation decision threshold, and, its current down channel is configured on the macrocell downstream bands outside the descending adjacent frequently interference and insulation frequency band, just this terminal is judged to the descending adjacent frequency interference and insulation frequency band candidate terminal of spatial reuse.

After finishing above-mentioned judgement, the down channel that network side will be subject to the macrocell terminal of the strong descending out-of-band radiation interference of Microcell is configured on the second descending sub-band of the first frequency band, the first descending sub-band is the sub-band between the second descending sub-band and the 3rd frequency band, in the present embodiment, the bandwidth of the first descending sub-band is 10MHz, and it is one group of bandwidth that the OFDM Resource Block forms of 10MHz by bandwidth that the descending out-of-band radiation interference and insulation frequency band here is one.

Network side is configured in the down channel of the descending adjacent frequently interference and insulation frequency band candidate terminal of spatial reuse on the first descending sub-band of the first frequency band, namely is configured in bandwidth and is on one group of OFDM Resource Block that the descending out-of-band radiation interference and insulation frequency band of 10MHz comprises.Although bandwidth is that the 3rd frequency band of the descending out-of-band radiation interference and insulation frequency band of 10MHz and Microcell is adjacent, but, owing to can have large propagation path loss with between candidate's macrocell terminal of the descending out-of-band radiation interference and insulation of spatial reuse frequency band and the Microcell WAP (wireless access point), so the band external leakage power of the emission of the Microcell access point on the 3rd frequency band channel can not produce interference to this macrocell terminal.

In the present embodiment, the macrocell monitoring means receives the Sounding Reference Signal of LTE macrocell terminal emission according to being the Sounding Reference Signal resource location of macrocell terminal assignments in corresponding running time-frequency resource position; Further, according to the Sounding Reference Signal that receives, estimate one or more of following parameter that Sounding Reference Signal arrives Microcell WAP (wireless access point) place:

1) the macrocell terminal transmit and the macrocell monitoring means between channel impulse response;

2) radio-frequency power or the signal strength signal intensity that transmit of macrocell terminal;

3) radio-frequency power that transmits of macrocell terminal or signal strength signal intensity are in the distribution of frequency domain.

Need to prove that in the situation of not conflicting, the embodiment among the application and the feature among the embodiment be combination in any mutually.

Certainly; the present invention also can have other various embodiments; in the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

One of ordinary skill in the art will appreciate that all or part of step in the said method can come the instruction related hardware to finish by program, described program can be stored in the computer-readable recording medium, such as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.

Claims

1. one kind is reduced the method that Microcell disturbs the descending out-of-band radiation of macrocell terminal, wherein,

2. the method for claim 1 is characterized in that,

3. the method for claim 1 is characterized in that,

4. the method for claim 1 is characterized in that,

5. the method for claim 1 is characterized in that,

6. the method for claim 1 is characterized in that,

The Sounding Reference Signal that described macrocell terminal sends.

7. one kind is reduced Microcell to the system that the descending out-of-band radiation of macrocell terminal disturbs, it is characterized in that,

Described system comprises the macrocell monitoring means, and monitoring result reports the unit, out-of-band radiation interference coordination unit; The first frequency band is the downstream bands of described macrocell, the 3rd frequency band is the downstream bands of described Microcell, and the first frequency band and the 3rd frequency band are adjacent frequency bands or have one not by the 5th frequency band of macrocell terminal and/or the use of Microcell terminal in the middle of the first frequency band and the 3rd frequency band; The first frequency band comprises the first adjacent descending 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; The sub-band that the first descending out-of-band radiation isolate bands is the first descending sub-band and with the 3rd frequency band or adjacent with the 5th frequency band; The 3rd frequency band comprises the first adjacent descending sub-band and the second descending sub-band, the first descending sub-band and the first frequency band or adjacent with the 5th frequency band; The sub-band that the 3rd descending out-of-band radiation isolate bands is the first descending sub-band and with the first frequency band or adjacent with the 5th frequency band;

8. system as claimed in claim 6 is characterized in that,

9. system as claimed in claim 6 is characterized in that,

10. system as claimed in claim 6 is characterized in that,

11. system as claimed in claim 7 is characterized in that,