CN101064529A - Interference measurement method, resource distribution method and its apparatus for FDMA system - Google Patents
Interference measurement method, resource distribution method and its apparatus for FDMA system Download PDFInfo
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Abstract
The invention discloses a interference detecting method, resource distributing method and device in frequency division multiple access system. The interference detecting method in the invention includes following steps: said system includes several geography areas, useful frequency band of reversed channel in the area are divided into at least two sub-bands; detecting the interference of said sub-bands; Sending the interference detecting result information of said sub band. With the invention, AT can obtain more accurate reversed channel interference information. So, AT decides the emitting power based on every sub band, the character of frequency selecting can be used to improve performance; considering the resource interfered little is distributed to AT, the sub band with big interference is avoided to improve the performance of AT, and the interference between the sector/area is decreased.
Description
Technical field
The present invention relates to fdma system, the resource allocation methods of the interference detecting result information that relate in particular to interference detecting method in a kind of fdma system, obtains based on this method, and interferometry device and resource allocation device.
Background technology
The 3G mobile communication technology is ripe gradually commercial at present, and 3GPP2 CDMA2000 1XEV-DO can further provide competitive wireless access system in the coming years.But want to keep following 10 years or the competitiveness in decades, need to introduce new wireless access technology.At present industry is reached preliminary unanimity with regard to the technology of the eating dishes without rice or wine evolution of 3GPP2, promptly is divided into 2 stages to carry out.In the stage one, adopt the multi-carrier EV-DO technology, more consideration is compatible, just the evolution items of short-term.In the stage two, introduce more advanced technology, such as OFDM (Orthogonal Frequency Division Multiplex, OFDM) technology, MIMO (Multi-Input Multi-Output, multiple-input and multiple-output) technology or the like, spectrum efficiency and peak rate that this can improve wireless access system widely are the evolution plans of 3GPP2 standard long-term.
Traditional multicarrier modulation system is that high-speed data-flow is formed the data flow of a plurality of low speed by serial to parallel conversion, and then distinguishes the carrier wave of modulated response, thereby constitutes the parallel transmission system that sends of a plurality of low-rate datas.Wherein a plurality of carrier waves that are used to modulate show as a plurality of nonoverlapping subcarriers on frequency band.The OFDM technology is a kind of special multi-carrier modulation technology, have between each subcarrier 1/2 overlapping, but keep mutually orthogonal, receiving terminal can by the correlation demodulation technical point from, constitute data transmission system more efficiently.The OFDM technology can improve spectrum efficiency greatly, utilizes DSP (digital signal processor) hardware of FFT (fast fourier transform) and IFFT (invert fast fourier transformation) to realize simultaneously, can simplify the realization of ofdm system greatly.Ofdm system can also reduce intersymbol interference in addition, makes full use of frequency selectivity.Because the plurality of advantages of OFDM technology is so the OFDM technology is widely used at present.OFDMA (OFDM access) system utilizes the OFDM technology to make multiplexing technology, promptly by distributing different data subcarriers to distinguish different users to different user.Because transfer of data is used different mutually orthogonal subcarriers between the user, so transfer of data can the phase mutual interference between the user.And when subcarrier is distributed, can take into full account this user's wireless environment situation, make full use of frequency selectivity, distribute the data subcarrier of the most suitable transmission to the user, by the allocation schedule optimization Algorithm, can be so that power system capacity improves.
In general Frequency Division Multiplexing system,, can obtain maximum spectrum efficiency like this, but co-channel interference will be brought the deterioration of cell boundary users performance if consider to realize that frequency duplex factor as one is 1.In reverse data transmission course based on the OFDMA system, the transmitting power of oneself is constantly adjusted in wireless access terminal (AT is called for short in the back), at first be to guarantee reverse channel quality, make the signal that arrives wireless access network (AN is called for short in the back) that enough energy be arranged, data can be by AN demodulation correctly.Simultaneously, AT needs also to guarantee that the transmitting power of oneself is not too large, otherwise the user of the external sub-district of meeting causes very big interference.In the OFDMA system, the sub-carrier resources that all AT are assigned with in the sub-district is mutually orthogonal, can not form interference, but the AT of outer sub-district may use identical sub-carrier resources, if the AT transmitting power of this sub-district is too big, outer sub-district AN can receive very strong interference signal, and then externally the Data Receiving of sub-district causes very big interference.Therefore, a very important problem is exactly how to reduce the minizone with interference frequently in the OFDMA system.So in the OFDMA system, the control of the power of backward channel must be considered the problem of external area interference.
In broadband wireless access standard 802.20 systems that QualCom company proposes, reverse channel power control is based on the power control algorithm of Delta, and the power of AT backward channel equals reverse reference channel power and adds the service channel power gain.Constantly adjust service channel power gain (RDCHGain),, reduce the interference of external sub-district again as far as possible so that the through-put power of AT backward channel had both satisfied the requirement of the transfer of data of AT own.Specific algorithm is as described below:
The interference of receiving on the whole frequency band is constantly measured in each sector (sector), and certain quantification is carried out in the interference of receiving, is divided into 3 grade: 0-and disturbs light; 1-disturbs heavy; 2-disturbs very heavy.Then, disturbed condition (0 or 1 or 2) is broadcast to all AT by forward channel.
Each AT monitors the interference value (OSI:other sector interference) of peripheral cell, and estimates oneself relative distance to peripheral cell.Relative distance is not the actual range distance of AT to peripheral cell, but by the loss ratio on the transmission path, be the transmission path loss value and the ratio of peripheral cell of Serving cell under AT arrives to the transmission path loss value of AT, can embody the distance of AT indirectly by this value from peripheral cell, in 802.20 agreements, promptly AT embodies to the ChanDiff value of peripheral cell.AT judges and takes all factors into consideration according to the far and near distance of peripheral cell and the disturbed condition of this Cell Broadcast CB.AT is to each sub-district on every side, at first calculate a DecisionThreshold, if this sector interference is little, then DecisionThreshold is proportional to relative distance, is inversely proportional to existing RDCHGain, if disturb heavy, then DecisionThreshold is proportional to RDCHGain, be inversely proportional to relative distance, if interference is very heavy, then DecisionThreshold is a very big constant.According to each DecisionThreshold that calculates, the AT decision improves this sector and still reduces power then.At the decision of each sector, ask weighted sum, and compare with certain thresholding, if be higher than certain thresholding, then AT will unify decision increases RDCHGain, if be lower than certain thresholding, AT will reduce RDCHGain, otherwise RDCHGain remains unchanged.The meaning of handling above is: if this AT from every side the sector near, power own is big again, and outer area interference is heavy, then AT should reduce power; If AT is far away from peripheral cell, power own is little, then should increase power.For other certain situation, AT is then according to certain rule, and power or power per liter fall in unified consideration.
Each sector is on the basis of whole bandwidth when the interference that measurement is received, such as on the bandwidth of a 5MHz, peripheral cell is measured the interference of receiving on the whole 5MHz bandwidth, is quantized into 3 grades then.Yet, during actual AT reverse transfer data, limited by AT power and other, this sub-district AN only understands the distribution portion sub-carrier resources and gives AT, the bandwidth of only having distributed 300KHz such as certain user, only account for 6% of whole bandwidth, and the frequency resource that actual AT uses may be low weight to other sector interference, if use the interference of whole bandwidth to do the power control reference, will the result of power control be impacted, can be such as AT itself with bigger power emission, can not form yet and disturb peripheral cell, but do reference owing to use whole bandwidth interference, may cause the AT can not power per liter, this obviously be that optimum system realizes.
In existing 802.20 systems, AT is when the reverse transfer data in addition, and the power on the whole service channel bands is to keep constant, that is to say that the transmitting power on each sub-carrier resources is identical.And during actual data transfer, the residing decline of each sub-carrier frequencies all is different, embodies the characteristics of frequency selectivity, and the subcarrier decline that has is big, and the subcarrier decline that has is little.In addition, the subcarrier that has is big to the interference of non-service cell, and the subcarrier that has is little to the interference of non-service cell.Neither optimum system realize so all sub-carrier resources transmitting powers are identical, can not make full use of the characteristics of frequency selectivity, can not realize inter-cell interference mitigation well.
Summary of the invention
The invention provides the interference detecting method in a kind of fdma system, solved the coarse problem of interferometry in the prior art.
The present invention also provides a kind of resource allocation methods based on interference detecting result information, has solved the irrational problem of resource allocation that causes owing to the interferometry inaccuracy in the prior art.
Based on identical technical conceive, the present invention provides a kind of interferometry device and two kinds of resource allocation devices respectively.
Interference detecting method provided by the invention is applied to fdma system, and described system comprises a plurality of geographic areas, and for each geographic area wherein, this method may further comprise the steps:
A, the available band of each backward channel in the one's respective area is divided at least two subbands;
B, the interference that described subband is subjected to are measured;
The interference detecting result information of C, the described subband of transmission.
According to said method of the present invention, among the described step B, measure the interference that this subband is subjected to by measuring the interference that described subband receives and the ratio of thermal noise.
In the said method,, calculate the ratio of described interference and thermal noise by measuring thermal noise power spectrum density in outer interference power stack in the zone of receiving on all subcarriers in the described subband and the described subband;
The ratio of described interference and thermal noise is the ratio of described interference power stack and described thermal noise power spectrum density sum and this thermal noise power spectrum density.
In the said method, by reverse quiet period is set, and measure the thermal noise power of in this quiet period, receiving, obtain described thermal noise power spectrum density.
According to said method of the present invention, comprise step before the described step C: described interference detecting result information is carried out signal processing.
Described signal processing comprises Filtering Processing or/and quantification treatment.
Described quantification treatment comprises and according to interference detecting result information and threshold value interference detecting result information is quantified as different level of interference.
According to said method of the present invention, among the described step C, described interference detecting result information is sent by overhead channel or by in-band signalling.
In the said method, described interference detecting result information is sent by in-band signalling or send by overhead channel.
According to said method of the present invention, among the described step C, send described interference detecting result information according to the frequency of setting.
According to said method of the present invention, among the described step C, adopt on forward channel, broadcast, clean culture or multicast, send described interference detecting result information.
According to said method of the present invention, described geographic area is sub-district or sector.
According to said method of the present invention, described fdma system comprises orthogonal frequency division multiple access system.
According to said method of the present invention, after the described step C, also comprise step:
The interference detecting result information of each subband of sending outside the terminal receiving area;
Adjust the transmitting power of the reverse data of this terminal according to described interference detecting result information, or/and this interference detecting result information is reported the service area of this terminal.
Resource allocation methods provided by the invention may further comprise the steps:
The interference detecting result information of each subband of sending outside D, the terminal receiving area;
E, adjust the transmitting power of the reverse data of this terminal according to described interference detecting result information, or/and this interference detecting result information is reported the coverage of this terminal.
According to said method of the present invention, in the described step e, describedly adjust the transmitting power of the reverse data of terminal according to interference detecting result information, comprising:
According to the interference detecting result information of the subband at reverse data place, adjust the transmitting power of reverse data on this subband; Perhaps
According to the interference detecting result information of the individual subband at reverse data place and the interference detecting result information of other subbands, adjust the transmitting power of reverse data on each subband.
Further comprise step in the described step e, described terminal calculates the power gain of each subband, and reports the service area of this terminal.
After the described step e, further comprising the steps of:
The interference detecting result information that send according to each terminal of one's respective area described coverage is or/and adjusted transmission power information determines to be the resource of each terminal distribution next time.
In the described step e, terminal receive that coverage, place network side sends report request after, the described extra-regional subband interference detecting result information that receives is sent to the network side in this Terminal Service zone.
Interferometry device provided by the invention is positioned at wireless access network, comprising:
The sub-band division unit is used for the available band of each backward channel in the one's respective area is divided at least two subbands;
Subband interferometry unit is used for to the subband of described sub-band division dividing elements suffered interference and measures;
The interference measurement results transmitting element, the interference detecting result information that is used for subband that described subband interferometry unit is measured sends.
Described interference detecting result information transmitting element also comprises: signal processing module is used for interference detecting result information is carried out signal processing.
First kind of resource allocation device provided by the invention is positioned at the wireless access terminal, comprising:
The interference measurement results receiving element, the interference detecting result information of each subband that is used for sending outside the receiving area;
Power adjustment unit is used for the subband interference detecting result information that receives according to described interference measurement results receiving element, adjusts the transmitting power of the reverse data of this terminal.
In the said apparatus, also comprise the interference measurement results transmitting element, the outer subband interference detecting result information in zone that is used for that described interference measurement results receiving element is received sends to the coverage network side at this terminal place.
Second kind of resource allocation device provided by the invention is positioned at the wireless access terminal, comprising:
The interference measurement results receiving element, the interference detecting result information of each subband that is used for sending outside the receiving area;
The interference measurement results transmitting element, the outer subband interference detecting result information in zone that is used for that described interference measurement results receiving element is received sends to the coverage network side at this terminal place.
Advantage and characteristics that the present invention is main are as follows:
1. adopt technical scheme of the present invention, AT can obtain more accurate backward channel interfere information.
2. can compatible effectively prior art, and can solve the scene that a lot of prior aries can not accurately be handled effectively.Non-serving sector reports disturbed condition by each sub-band, makes AT can distribute and each sub-band disturbed condition the decision transmitting power according to self sub-carrier resources.AT does not reduce the performance of oneself as far as possible when reducing external sector interference.Based on each sub-band decision transmitting power, can make full use of the characteristics of frequency selectivity simultaneously, save power.
3. in scheduling, take into full account and to be disturbed little resource allocation to give AT.By the interfere information of sub-band feedback, in scheduling, take in, avoid disturbing big sub-band, disturb light sub-band resource and give AT, thereby improve the performance of AT, and reduce the interference between the sub-district.
Description of drawings
Fig. 1 illustrates the embodiment of the invention 1 described each sub-band disturbed condition that listens to from outer sector;
Fig. 2 illustrates the embodiment of the invention 2 described each sub-band disturbed condition that listens to from outer sector;
Fig. 3 is the structural representation that is positioned at the interferometry device of network side of the present invention;
Fig. 4 is one of structural representation of the resource allocation device that is positioned at end side of the present invention;
Fig. 5 be the resource allocation device that is positioned at end side of the present invention structural representation two.
Embodiment
Describe the present invention below in conjunction with drawings and Examples.
The process that subband disturbs, sends measurement result is measured in each sector that present embodiment has been described in the fdma communication systems, and terminal receives the resource allocation process after the interference measurement results, and concrete steps comprise:
At first, the sector is divided into 4 sub-band with whole 5MHz bandwidth.
Can divide equally also and can not divide equally when dividing subband.Such as the subband of the bandwidth of 5MHz being divided 4 1.25MHz: subband 0, subband 1, subband 2, subband 3.
Then, measure the inter-sector interference that is subjected on each sub-band.Inter-sector interference can be disturbed ratio with thermal noise (Interference over thermal noisepower IOT) embodies by measuring all that receive on each subband.The concrete calculating of IOT can be adopted following expression:
Wherein
Be the outer sector interference power stack of receiving on all subcarriers in the subband.J is all sub-carrier indices signs in the subband.Comprise subcarrier 0～subcarrier 127 such as the subcarrier in the subband of in abovementioned steps, dividing 0; Subcarrier in the subband 1 comprises subcarrier 128～subcarrier 255; Subcarrier in the subband 2 comprises subcarrier 256～subcarrier 383; Subcarrier in the subband 3 comprises subcarrier 384～subcarrier 511.In order to reduce adjacent interference frequently, generally also need to exist the protection subcarrier, this moment, each subband also should be deducted the protection subcarrier.
N
0, be thermal noise power spectrum density in the subband.The base station can be provided with reverse silence period, and in reverse silence period, all serviced AT oppositely do not send data to the base station, so the thermal noise power of receiving can be measured in the base station.
The IOT on each subband is calculated in the sector, also will carry out certain signal processing, such as Filtering Processing and quantification treatment.
The purpose of filtering mainly is in order to eliminate shake, to alleviate the influence of bursty interference to system, investigating the situation of change of disturbing from long-term angle.
The purpose of quantification treatment is to reduce transport overhead, such as carrying out following quantification treatment:
Above-mentioned quantification treatment procedural representation sets in advance a threshold value, and IOT thinks serious interference when surpassing this threshold value, and then level of interference is set to 1, otherwise is set to 0.In the above-mentioned expression formula, i is corresponding to subband index, and n represents the interferometry periodic key.Wherein IOTtarget is that system wishes the interference level (being threshold value) that reaches.Hint disturbed condition on each subband with the information of 1bit, 0 expression is disturbed light, and 1 expression is disturbed heavy.Certainly, the granularity of quantification is thin more, and the information that can express is just detailed more, but can increase expense, needs a kind of compromise to handle.
At last, AN sends the interference measurement results of each subband.
AN adopts broadcasting, clean culture or multicast mode, sends the OSI_per_subband of each subband by overhead channel.
Frequency for sector broadcasting subband interfere information is controlled by AN, such as in order to reduce expense, can adopt in a period of time and broadcast once, and the cycle of broadcasting is determined (system parameters of broadcasting is determined or agreement is determined) by AN; AN can also on each physical frame by forward control channel on the interfere information of broadcasting on each subband, the AT of adjacent sectors just can be more detailed like this obtains interfere information on each subband of this sector, thereby carry out accurate more and quick power control, reduce co-channel interference this sector.
Certainly AN also can notify AT by in-band signalling with the actual value of IOT.
In addition, being divided into several sub-band also is that a kind of compromise is handled, and it is many more that sub-band divides, and can feedack also be detailed more.If according to 4 sub-band feedbacks, F-OSI then transmits 4bits at every turn, such as transmission 1101, it is heavy to represent that then sub-band0, sub-band1, sub-band3 disturb, and sub-band2 disturbs light.
The OSI information of subband in this sector is all measured in intrasystem each sector, and broadcasts by overhead channel.AT monitors the overhead channel from the transmission OSI information of outer sector, obtains the disturbed condition on each sub-band of outer sector.As shown in Figure 1, AT receives the OSI channel of adjacent 3 sub-districts altogether, and on the sub-band0 of all neighbor cells, heavier interference is all arranged, and the interference on the sub-band2 is lighter.
Then, AT is according to the distribution situation of distributing to self sub-carrier resources, the decision transmitting power.The principle of mainly following is: when disturbing greatly on certain subband of sector broadcasting outside receiving, then AT reduces the transmitting power on this subband; Disturb on certain subband of sector broadcasting outside receiving hour, then AT suitably increases the transmitting power on this subband.Such as having following several situation:
1) the promising AT sub-carrier resources of distributing belong in the subband, at this moment, AT carries out the power adjustment according to the outer sector interfere information on the subband.AT is according to self power capability in subband, and the disturbed condition of far and near and outer sector, the outer sector of distance determines the transmitting power of interior self sub-carrier resources of subband.Such as the subband interfere information of receiving the broadcasting of outer sector owing to AT, so AT can be adjusted at transmitting power on this subband by certain algorithm, that is to say the transmitting power of AT on this subband be presented as be outside the function of interfere information on this subband of sector, for different annoyance levels, AT should carry out different power adjustment.AT raises the purpose of penetrating power of haircuting at this subband will guarantee that videlicet the own back emitted power of AT satisfies receptivity, also will reduce the co-channel interference of external sector as much as possible.
2) the promising AT sub-carrier resources of distributing belong to a plurality of sub-band, at this moment, AT is according to the distribution condition of self sub-carrier resources, in conjunction with the disturbed condition on each sub-band of outer sector, unification is considered, determines the transmitting power on each subband, and carries out the reverse data transmission.Such as because the annoyance level difference can determine different transmitting powers by a plurality of subbands, carry out reverse data and send.
Certainly, grade and annoyance level that AT can go up each sub-band transmitting power report AN, and the scheduling of carrying out the back for AN distributes.Request (SubbandOSIReportRequest) message of AN by reporting the subband interference measurement results, require AT that the interfere information on each subband of measuring in a period of time is reported, AT is then by subband interference measurement results report (SubbandOSIReport) message response.After receiving the SubbandOSIReportRequest message that AN sends over, the interference that is subjected on each subband is reported AN such as AT by sending SubbandOSIReport message.By in SubbandOSIReport message, increasing field NumSubband and the SubbandOSIValue that carries the subband interference detecting result information newly, make AN and AT can carry out the mutual of interference measurement results.
A kind of form of typical SubbandOSIReport message such as following table:
| Field | ?Length(bits) | Implication |
| MessageID | ?8 | Message identifier |
| SuperframeReferenceNumber | ?34 | Superframe is with reference to quantity |
| NumPilots | ?5 | The zone number |
NumPilots?occurrences?of?the?following?record{
| PilotPN | ?12 | Area identification |
| CarrierID | ?2 | The subcarrier sign |
| NumOSIValue | ?8 | Report the number of sub-bands of interference measurement results |
NumOSIValue?instances?of?the?following?two?fields{
| OSIValue | ?2 | Subband interference measurement results value |
| ChanDiff | ?8 | Region distance |
| NumSubband | ?4 | The quantity of subband |
NumSubband+1?occurrences?of?the?following?field{
| SubbandOSIValue | ?2 | The interference measurement results value of each subband |
}}}
| Reserved | ?0～7(as ?needed) | Reserved field |
Wherein NumSubband represents the quantity (number of sub-bands also can be carried, but in system parameters message broadcasting regulation) of the subband measured, and and then SubbandOSIValue reports the interfere information of measuring on each subband successively.AN then can obtain interfere information on each subband by resolving SubbandOSIReport message, thereby can better carry out scheduling of resource.
In addition, the embodiment of the invention at some in particular cases can directly adopt the adjustment mode of transmitting power in the prior art.Such as the subcarrier that distributes of promising AT when belonging to same sub-band, again when all receiving very heavy interference or very light interference on each sub-band of each sector, also can simply think the interference of receiving on the sub-band, just can use existing power adjustment mode this moment.Yet the embodiment of the invention compared with prior art advantage is that AT can obtain more accurate backward channel interfere information, thereby carries out more accurate power adjustment.Still be example with Fig. 1, in the prior art, if only measure the interference of whole bandwidth, then AT may listen to sector1 and sector2 all be disturb heavy.If what AT distributed at this moment is the sub-carrier resources of sub-band2, for 3 adjacent sectors, interference is not very heavy in fact, and then the power control scheme of prior art may reduce the transmitting power of this AT mistakenly.If the employing embodiment of the invention by taking all factors into consideration 3 disturbed conditions on the sub-band2 of sector, can be regulated the transmitting power of this AT more exactly.
The process that subband disturbs, sends measurement result is measured in each sector that present embodiment has been described in the fdma communication systems, and terminal receives the process that reports its place service area after the interference measurement results, and concrete steps comprise:
The sector is divided into 4 sub-band with whole 5MHz bandwidth, and measures the interference that is subjected on each sub-band, gives all AT by forward direction expense F-OSI channel radio interfere information, can certainly adopt clean culture or multicast mode.Generally need carry out signal processing to interfere information, such as processing such as filtering, quantifications, the effect of Filtering Processing is to prevent the influence of disturbing acute variation to bring, and quantification treatment then is because the forward direction overhead channel is can information transmitted limited.Such as the disturbed condition that can set hope, when the interference value of actual measurement during greater than this desired value, then expression is disturbed heavyly, otherwise that expression is disturbed is light.With the information hint disturbed condition of 1bit, 0 expression is disturbed light, and 1 expression is disturbed heavy.Certainly, the granularity of quantification is thin more, and the information that can express is just detailed more, but can increase expense, needs a kind of compromise to handle.In addition, being divided into several sub-band also is that a kind of compromise is handled, and it is many more that sub-band divides, and can feedack also be detailed more.If according to 4 sub-band feedbacks, F-OSI then transmits 4bits at every turn, such as transmission 1101, it is heavy to represent that then sub-band0, sub-band1 and sub-band3 disturb, and sub-band2 disturbs light.
The OSI information of subband in this sector is all measured in intrasystem each sector, and broadcasts by overhead channel.AT monitors the OSI channel from outer sector, obtains the disturbed condition on each sub-band of outer sector.Be actually the information of reception,, can consider because the phase mutual interference of sub-district is very little at a distance from neighbor cell.Receive the interfere information on 4 subband of certain strong jamming sector B such as certain AT, as shown in Figure 2.And sector B has heavier interference on sub-band0, sub-band1 and sub-ban2, and the interference on the sub-band3 is lighter.
AT gives AN with the interference measurement results of each sub-band of measuring in a period of time by the SubbandOSIReport information reporting after receiving the SubbandOSIReportRequest message that AN sends, the scheduling of carrying out the back for AN distributes.
After AT fed back to its serving sector by in-band signalling or overhead channel with this interference measurement results, serving sector just can be paid the utmost attention to and give this AT with the subcarrier resource distribution on the sub-band3 when AT is carried out resource allocation.
In the foregoing description 2, AT can also be earlier calculates RDCHGain on each subband according to power control, gives serving sector with these RDCHGain by the SubbandOSIReport information reporting then.Which RDCHGain is big more, and serving sector just can be paid the utmost attention to corresponding subband is gone up subcarrier allocation to this AT.
Should be pointed out that the sector that relates in the foregoing description, also can be geographic areas such as sub-district, according to the geographic area of communication system dividing and decide.The range of application of the foregoing description is not limited to the orthogonal frequency division multiple access system in the fdma system.
Based on identical technical conceive, the interferometry device that the embodiment of the invention a kind of is positioned at network side as shown in Figure 3.
Referring to Fig. 3, this device is positioned at AN, and this equipment comprises sub-band division unit, subband interferometry unit and interference measurement results transmitting element.
Wherein, the sub-band division unit is used for the available band of each backward channel in the one's respective area is divided at least two subbands, and record sub-band division situation; Subband interferometry unit is used for the suffered interference of subband that the subband division unit is divided is measured; The interference measurement results transmitting element is used for sending the interference measurement results of the subband of measuring subband interferometry unit on the forward direction overhead channel.
The interference measurement results transmitting element comprises and is used for interference measurement results is carried out the signal processing module of signal processing.This signal processing module can be interferometry information filter module and/or interfere information quantization modules etc.
Based on identical technical conceive, the embodiment of the invention also provides a kind of resource allocation device that is positioned at end side, as shown in Figure 4.
Referring to Fig. 4, this device comprises interference measurement results receiving element and power adjustment unit.
The interference measurement results of each subband that the interference measurement results receiving element is used for sending outside the receiving area; The subband interference measurement results that power adjustment unit is used for receiving according to the interference measurement results receiving element is adjusted the transmitting power of this terminal reverse data.
This device also comprises the interference measurement results transmitting element, is used for the extra-regional subband interference measurement results that the interference measurement results receiving element receives is sent to the coverage network side at this terminal place.
Referring to Fig. 5, be the another kind of resource allocation device of the embodiment of the invention, this device comprises interference measurement results receiving element and interference measurement results transmitting element.
The interference measurement results of each subband that the interference measurement results receiving element is used for sending outside the receiving area; The interference measurement results transmitting element is used for the extra-regional subband interference measurement results that the interference measurement results receiving element receives is sent to the coverage network side at this terminal place.
With 5 different functions is shown as different square frames though should be pointed out that Fig. 3,4, this function of never getting rid of some functional unit/modules is wherein carried out by individual unit/module.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (24)
1, the interference detecting method in a kind of fdma system, described system comprises a plurality of geographic areas, for each geographic area wherein, this method may further comprise the steps:
A, the available band of each backward channel in the one's respective area is divided at least two subbands;
B, the interference that described subband is subjected to are measured;
The interference detecting result information of C, the described subband of transmission.
2, the method for claim 1 is characterized in that, among the described step B, measures the interference that this subband is subjected to by measuring the interference that described subband receives and the ratio of thermal noise.
3, method as claimed in claim 2 is characterized in that, by measuring thermal noise power spectrum density in outer interference power stack in the zone of receiving on all subcarriers in the described subband and the described subband, calculates the ratio of described interference and thermal noise;
The ratio of described interference and thermal noise is the ratio of described interference power stack and described thermal noise power spectrum density sum and this thermal noise power spectrum density.
4, method as claimed in claim 3 is characterized in that, by reverse quiet period is set, and measures the thermal noise power of receiving in this quiet period, obtains described thermal noise power spectrum density.
5, the method for claim 1 is characterized in that, comprises step before the described step C: described interference detecting result information is carried out signal processing.
6, method as claimed in claim 5 is characterized in that, described signal processing comprises Filtering Processing or/and quantification treatment.
7, method as claimed in claim 6 is characterized in that, described quantification treatment comprises and according to interference detecting result information and threshold value interference detecting result information is quantified as different level of interference.
8, the method for claim 1 is characterized in that, among the described step C, described interference detecting result information is sent by overhead channel or by in-band signalling.
9, method as claimed in claim 8 is characterized in that, described interference detecting result information is sent by in-band signalling or send by overhead channel.
10, the method for claim 1 is characterized in that, among the described step C, sends described interference detecting result information according to the frequency of setting.
11, as claim 1 or 5 described methods, it is characterized in that, among the described step C, adopt on forward channel, broadcast, clean culture or multicast, send described interference detecting result information.
12, the method for claim 1 is characterized in that, described geographic area is sub-district or sector.
13, the method for claim 1 is characterized in that, described fdma system comprises orthogonal frequency division multiple access system.
14, the method for claim 1 is characterized in that, after the described step C, also comprises step:
The interference detecting result information of each subband of sending outside the terminal receiving area;
Adjust the transmitting power of the reverse data of this terminal according to described interference detecting result information, or/and this interference detecting result information is reported the service area of this terminal.
15, a kind of resource allocation methods based on interference detecting result information as claimed in claim 1 is characterized in that, may further comprise the steps:
The interference detecting result information of each subband of sending outside D, the terminal receiving area;
E, adjust the transmitting power of the reverse data of this terminal according to described interference detecting result information, or/and this interference detecting result information is reported the coverage of this terminal.
16, method as claimed in claim 15 is characterized in that, in the described step e, describedly adjusts the transmitting power of the reverse data of terminal according to interference detecting result information, comprising:
According to the interference detecting result information of the subband at reverse data place, adjust the transmitting power of reverse data on this subband; Perhaps
According to the interference detecting result information of each subband at reverse data place and the interference detecting result information of other subbands, adjust the transmitting power of reverse data on each subband.
17, method as claimed in claim 15 is characterized in that, further comprises step in the described step e, and described terminal calculates the power gain of each subband, and reports the service area of this terminal.
18, method as claimed in claim 15 is characterized in that, and is after the described step e, further comprising the steps of:
The interference detecting result information that send according to each terminal of one's respective area described coverage is or/and adjusted transmission power information determines to be the resource of each terminal distribution next time.
19, method as claimed in claim 15, it is characterized in that, in the described step e, terminal receive that coverage, place network side sends report request after, the described extra-regional subband interference detecting result information that receives is sent to the network side in this Terminal Service zone.
20, a kind of interferometry device is positioned at wireless access network, it is characterized in that, comprising:
The sub-band division unit is used for the available band of each backward channel in the one's respective area is divided at least two subbands;
Subband interferometry unit is used for to the subband of described sub-band division dividing elements suffered interference and measures;
The interference measurement results transmitting element, the interference detecting result information that is used for subband that described subband interferometry unit is measured sends.
21, device as claimed in claim 20 is characterized in that, described interference detecting result information transmitting element also comprises: signal processing module is used for interference detecting result information is carried out signal processing.
22, a kind of resource allocation device is positioned at the wireless access terminal, it is characterized in that, this device comprises:
The interference measurement results receiving element, the interference detecting result information of each subband that is used for sending outside the receiving area;
Power adjustment unit is used for the subband interference detecting result information that receives according to described interference measurement results receiving element, adjusts the transmitting power of the reverse data of this terminal.
23, device as claimed in claim 22, it is characterized in that, also comprise the interference measurement results transmitting element, the outer subband interference detecting result information in zone that is used for that described interference measurement results receiving element is received sends to the coverage network side at this terminal place.
24, a kind of resource allocation device is positioned at the wireless access terminal, it is characterized in that, this device comprises:
The interference measurement results receiving element, the interference detecting result information of each subband that is used for sending outside the receiving area;
The interference measurement results transmitting element, the outer subband interference detecting result information in zone that is used for that described interference measurement results receiving element is received sends to the coverage network side at this terminal place.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101364477A CN101064529A (en) | 2006-04-29 | 2006-10-25 | Interference measurement method, resource distribution method and its apparatus for FDMA system |
| CN2007800004049A CN101317412B (en) | 2006-04-29 | 2007-04-29 | Interference measuring method, resource allocation method and device in frequency division multiple address system |
| PCT/CN2007/001462 WO2007128233A1 (en) | 2006-04-29 | 2007-04-29 | Interference estimating method, resource allocating method in fdma system and apparatus thereof |
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| CN200610079108.X | 2006-04-29 | ||
| CN200610079108 | 2006-04-29 | ||
| CNA2006101364477A CN101064529A (en) | 2006-04-29 | 2006-10-25 | Interference measurement method, resource distribution method and its apparatus for FDMA system |
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| CN2007800004049A Active CN101317412B (en) | 2006-04-29 | 2007-04-29 | Interference measuring method, resource allocation method and device in frequency division multiple address system |
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Family Cites Families (4)
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-
2006
- 2006-10-25 CN CNA2006101364477A patent/CN101064529A/en active Pending
-
2007
- 2007-04-29 CN CN2007800004049A patent/CN101317412B/en active Active
- 2007-04-29 WO PCT/CN2007/001462 patent/WO2007128233A1/en active Application Filing
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Also Published As
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| WO2007128233A1 (en) | 2007-11-15 |
| CN101317412A (en) | 2008-12-03 |
| CN101317412B (en) | 2011-04-13 |
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