CN101772164B - Method and device for allocating time-frequency resource sending detection signal in base station - Google Patents
Method and device for allocating time-frequency resource sending detection signal in base station Download PDFInfo
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- CN101772164B CN101772164B CN2009100448572A CN200910044857A CN101772164B CN 101772164 B CN101772164 B CN 101772164B CN 2009100448572 A CN2009100448572 A CN 2009100448572A CN 200910044857 A CN200910044857 A CN 200910044857A CN 101772164 B CN101772164 B CN 101772164B
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Abstract
The invention provides a technical scheme for allocating a time-frequency resource used for sending a detection signal for a mobile station administered by a base station in the base station of a wireless communication network. The base station divides the time-frequency resource which can be used by the base station and is used for each mobile station administered by the base station to send the detection signal into a plurality of frequency resource groups according to a first preset rule, each frequency resource group corresponds to one quality range of downlink channel quality, the base station receives a downlink channel quality indication signal from the mobile station, and then the time-frequency resource in the corresponding frequency resource group is allocated to the mobile station according to the downlink channel quality indication signal. By using the technical scheme provided by the invention, the interference on the detection signal, particularly the detection signal sent by the mobile station positioned at the cell edge, can be effectively reduced, and the base station can simultaneously support centralized and distributed detection channel allocation.
Description
Technical field
The present invention relates to the base station and be used in the running time-frequency resource that sends detectable signal for each mobile radio station branch.
Background technology
In recent years, the TDD system is because its outstanding advantage has attracted increasing concern.The reciprocity (Reciprocity) that an important advantage of TDD system is the up-downgoing channel; Also be; The base station is according to the uplink detection signal (Sounding Signals) that receives; After according to transmitting-receiving radio frequency difference estimated up channel state information being calibrated, can derive descending channel information.The wireless channel that is used to send detectable signal is known as sounding channel.The descending channel information of deriving can be used in suitable precoding or the beam forming technique to improve the performance of system by the base station.These precodings or beam forming technique comprise the closed loop precoding based on singular value decomposition (SVD) in the Single User MIMO, the block diagonalization in the multiuser MIMO, and zero in the multi-base station disturbs precoding technique etc.In the evolution of broadband wireless communication network and standardization, played the part of more and more important role based on the closed loop precoding of detectable signal.
But existing sounding channel distributes and has some shortcomings.Sounding channel distributes by single base station is isolated to be realized, therefore, is difficult to avoid the interference of neighbor cell on sounding channel.When the mobile radio station that sends detectable signal was positioned at the edge of sub-district, neighbor cell was especially serious to the interference of sounding channel.In addition; Existing base station or send detectable signal for mobile radio station distributes the continuous frequency resource (being referred to as " centralized sounding channel ") of physics to be used for mobile radio station; For distributing the discontinuous distributed frequency resource of physics (being referred to as " distributed sounding channel ") to be used for mobile radio station, mobile radio station sends detectable signal; Also be; The base station can not support centralized sounding channel to distribute simultaneously or distributed sounding channel distributes, and is inconsistent between this frequency distribution that has caused sounding channel sometimes and the descending radio frequency resources distribution.More than these shortcomings caused the performance of whole system to reduce.
Summary of the invention
To the problems referred to above in the background technology; Following technical scheme is provided in one embodiment of the invention: the base station is divided into a plurality of frequency resource groups according to first pre-defined rule frequency resource that is used for its each mobile radio station transmission detectable signal of having jurisdiction over that it is available; And, be used in the running time-frequency resource that sends detectable signal for the mobile radio station branch on this basis according to the down channel quality of mobile radio station.
According to a specific embodiment of the present invention; A kind of method that its mobile radio station branch of having jurisdiction over is used in the running time-frequency resource that sends detectable signal that in wireless communication network base station, is used to is provided; Wherein, Said base station is divided into a plurality of frequency resource groups according to first pre-defined rule frequency resource that is used for its each mobile radio station transmission detectable signal of having jurisdiction over that it is available; Each frequency resource group is corresponding to a mass range of down channel quality, and this method may further comprise the steps: a. receives the down channel quality index signal from mobile radio station; B. according to said down channel quality index signal, give said mobile radio station with the time-frequency resource allocating in the frequency resource group of correspondence.
According to another specific embodiment of the present invention; A kind of resource allocation device that its mobile radio station branch of having jurisdiction over is used in the running time-frequency resource that sends detectable signal that in wireless communication network base station, is used to is provided; Wherein, Said base station is divided into a plurality of frequency resource groups according to first pre-defined rule frequency resource that is used for its each mobile radio station transmission detectable signal of having jurisdiction over that it is available; Each frequency resource group is corresponding to a mass range of down channel quality, and this resource allocation device comprises receiving system and distributor.Wherein, receiving system is used to receive the down channel quality index signal from mobile radio station; Distributor is used for according to said down channel quality index signal, gives said mobile radio station with the time-frequency resource allocating in the frequency resource group of correspondence.
The technical scheme that the application of the invention provides can alleviate the suffered interference of detectable signal effectively, especially is positioned at the detectable signal of transmission of the mobile radio station of cell edge.In addition, the method for the application of the invention, the base station can be supported the distribution of centralized and distributed sounding channel simultaneously, can realize the consistency that professional traffic channel assignments of bearing downlink and the sounding channel that carries detectable signal distribute well.
Description of drawings
Through reading below in conjunction with the description of accompanying drawing to indefiniteness embodiment, other purpose of the present invention, feature and advantage will become more obvious and outstanding.
Fig. 1 is the network topology structure figure according to an embodiment of the present invention;
Fig. 2 is the frequency resource division sketch map that mobile radio station sends detectable signal that is used for according to an embodiment of the present invention;
Fig. 3 is the frequency resource use sketch map that mobile radio station sends detectable signal that is used for according to an embodiment of the present invention;
Fig. 4 is used to the method flow sketch map that its mobile radio station branch of having jurisdiction over is used in the running time-frequency resource that sends detectable signal for an embodiment according to the present invention in the base station;
Fig. 5 is the frequency resource division sketch map that mobile radio station sends detectable signal that is used for according to another embodiment of the present invention;
Fig. 6 is the frequency resource division sketch map that mobile radio station sends detectable signal that is used for according to another embodiment of the present invention;
Fig. 7 is used for the frequency resource division sketch map that mobile radio station sends detectable signal for another embodiment according to the present invention;
Fig. 8 is used to the structural representation block diagram that its mobile radio station branch of having jurisdiction over is used in the resource allocation device of the running time-frequency resource that sends detectable signal for another embodiment according to the present invention in wireless communication network base station;
Wherein, same or analogous Reference numeral is represented same or analogous steps characteristic/device (module).
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention is elaborated.
Fig. 1 shows the network topology structure figure according to an embodiment of the present invention.In Fig. 1, comprise base station 11, mobile radio station 12-1,12-2 and 12-3.Wherein, mobile radio station 12-1 is positioned at the center of 11 jurisdiction districts 10, base station, and mobile radio station 12-3 is positioned at the edge of sub-district 10, and mobile radio station 12-2 leaves between the distance of base station 11 between mobile radio station 12-1 and 12-3 from the distance of base station 11.
Ground is without loss of generality; Frequency bandwidth with orthogonal frequency division multiple access system is 10MHz, and comprising 864 number of sub-carrier is example, and; Base station 11 is the time-frequency resource allocating that unit is used to send detectable signal with 18 adjacent subcarriers of physics; Claim that the adjacent subcarrier of these 18 physics is that (Sounding Resource Unit, SRU), then system comprises 48 available like this detection Resource Units to a detection Resource Unit.Base station 11 can be divided into a plurality of frequency resource groups with these 48 available detection Resource Units according to first pre-defined rule.This first pre-defined rule can dispose when system initialization; Also can be by the higher level equipment of base station 11 base station controller untill further notice base station 11 for example; Perhaps also can be base station informing base station 11, and keep identical frequency resource to divide in each base station by other; In addition, the particular content of first pre-defined rule is not limit, and hereinafter will be elaborated to this.
Fig. 2 shows the division exemplary plot of the frequency resource of an embodiment of the present invention.In Fig. 2, base station 11 is divided into two frequency resource group FP11 and FP12 according to first pre-defined rule with available detection Resource Unit.FP11 comprises 1 to 36 SRU, and FP12 comprises 37 to 48 SRU.Wherein, the time-frequency resource allocating among the FP11 is given those down channel qualities mobile radio station preferably, also is frequency resource group FP11 correspondence down channel quality preferably.Usually for the mobile radio station that is positioned at cell centre, the down channel quality of base station 11 to this mobile radio station is better, for example the mobile radio station 12-1 among Fig. 1.Time-frequency resource allocating among the FP12 is given the relatively poor mobile radio station of those down channel qualities, also is the corresponding relatively poor down channel quality of frequency resource group FP12.Usually for the mobile radio station that is positioned at cell edge, the down channel quality of base station 11 to this mobile radio station is relatively poor, for example the mobile radio station 12-3 among Fig. 1.For fear of the interference of minizone, usually the running time-frequency resource among the FP12 is divided into a plurality of parts, neighbor cell uses different portions, to avoid the interference between the mobile radio station at cell edge place.For example, as shown in Figure 3, for hexagonal cellular cell; Can the running time-frequency resource among the FP12 be divided into three parts, FP12-1, FP12-2; FP12-3, wherein FP12-1 are used in the sub-district had jurisdiction over, base station 11 10, and its six adjacent sub-districts are used alternatingly FP12-2 and FP-3 respectively.If FP12-2 is used in the sub-district that base station 11 is had jurisdiction over 10, then its six adjacent sub-districts are used alternatingly FP12-1 and FP-3 respectively; If FP12-3 is used in the sub-district that base station 11 is had jurisdiction over 10, then its six adjacent sub-districts are used alternatingly FP12-1 and FP12-2 respectively.
Fig. 2 and situation shown in Figure 3 constitute an example of first pre-defined rule.Those of ordinary skill in the art will be understood that the content of first pre-defined rule do not limit, as long as can make base station 11 and adjacent base station coordinate the frequency of utilization resource, avoids producing presence of intercell interference.
Fig. 4 shows and in the base station, is used to the method flow sketch map that its mobile radio station branch of having jurisdiction over is used in the running time-frequency resource that sends detectable signal according to an embodiment of the present invention.Below in conjunction with Fig. 1 and Fig. 2, base station 11 for distributing the process of the running time-frequency resource that sends detectable signal, mobile radio station 12-1,12-2 and 12-3 is elaborated.
At first, in step S401, the down channel quality index signal that base station 11 receives from mobile radio station 12.
Then, in step S402, base station 11 is given mobile radio station 12 according to the downlink signal quality index signal from mobile radio station 12 with the corresponding time-frequency resource allocating in the frequency resource group of correspondence.
Particularly; With mobile radio station 12-1 is example; Base station 11 is according to the down channel quality index signal from mobile radio station 12-1 that receives; The down channel quality of judging mobile radio station 12-1 is better, then will give mobile radio station 12-1 with the corresponding time-frequency resource allocating among down channel quality is corresponding preferably the frequency resource group FP11, is used for mobile radio station 12-1 transmission detectable signal.
Particularly, the down channel quality index signal can comprise multiple, for example, and downstream signal interference-to-noise ratio, the perhaps average signal strength of down receiving signal indication (RSSI) etc.Be higher than the indication of a predetermined threshold or downstream signal average signal strength like downstream signal interference-to-noise ratio and be higher than a predetermined threshold, can judge that then the downlink signal quality of mobile radio station 12-1 is better from mobile radio station 12-1.
Be example with mobile radio station 12-3 again; Base station 11 is according to the down channel quality index signal from mobile radio station 12-3 that receives; The down channel quality of judging mobile radio station 12-3 is relatively poor; Then give mobile radio station 12-3, be used for mobile radio station 12-3 and send detectable signal the time-frequency resource allocating among the FP12-1 among the frequency resource group FP12.Particularly, be lower than the indication of a predetermined threshold or downstream signal average signal strength like downstream signal interference-to-noise ratio and be lower than a predetermined threshold, can judge that then the down channel quality of mobile radio station 12-3 is relatively poor from mobile radio station 12-3.
As the variant that frequency resource shown in Figure 2 is divided, also can comprise the SRU of all operable frequency resources 1 to 48 among FP11, the FP12.Wherein, FP12-1 comprises 1 to 16 SRU, and FP12-2 comprises 17 to 32 SRU, and FP12-3 comprises 33 to 48 SRU.This constitutes another example of first pre-defined rule.
Fig. 5 shows according to the detection Resource Unit of another embodiment of the present invention and divides sketch map.Still the frequency bandwidth with orthogonal frequency division multiple access system is 10MHz, and comprising 864 number of sub-carrier is example, and the adjacent subcarrier of per 18 physics is one and surveys Resource Unit.In Fig. 5, whole frequency resource is divided into three part FP21, FP22 and FP23, and wherein, FP21 comprises 1 to 12 SRU, and FP22 comprises 13 to 36 SRU, and FP23 comprises 37 to 48 SRU.Wherein, the time-frequency resource allocating among the FP21 is given those down channel qualities mobile radio station preferably, also is frequency resource group FP21 correspondence down channel quality preferably.Time-frequency resource allocating among the FP22 is given those down channel qualities time good mobile radio station, also is the corresponding time good down channel quality of frequency resource group FP22.Time-frequency resource allocating among the FP23 is given the relatively poor mobile radio station of those down channel qualities, also is the corresponding relatively poor down channel quality of frequency resource group FP22.Wherein, for fear of the interference of neighbor cell, the frequency resource among the FP23 is divided into three part FP23-1, FP23-2 and FP23-3 again.Wherein, FP23-1 comprises 37 to 40 SRU, and FP23-2 comprises 41 to 44 SRU, and FP23-3 comprises 45 to 48 SRU.
For each frequency resource group FP, define a frequency duplex factor as one FC, its implication is for each frequency resource group, base station 11 available frequencies resources account for the ratio of frequency resources all in this frequency resource group.For frequency resource group FP21, wherein whole frequency resources can be used in base station 11, and its frequency duplex factor as one FC equals 1.For frequency resource group FP22, can be example with 13 to 28 SRU wherein with base station 11, then frequency duplex factor as one FC is 2/3.For frequency resource group FP23, can with FP23-1 wherein example with base station 11, then frequency duplex factor as one FC is 1/3.
Have under the situation of different frequency duplex factor as one in definition frequency duplex factor as one and each frequency resource group, the time-frequency resource allocating in the frequency resource group that the multiplexing factor is higher of base station 11 is given has the mobile radio station of down channel quality preferably.Nature, the time-frequency resource allocating in the frequency resource group that the multiplexing factor is lower is given the mobile radio station with relatively poor down channel quality.
For example; For mobile radio station 12-1; The down channel quality preferably that has of mobile radio station 12-1 is judged according to the down channel quality indication information from mobile radio station 12-1 that receives in base station 11, and the time-frequency resource allocating among then that the multiplexing factor is the higher frequency resource group FP21 is given mobile radio station 12-1.For mobile radio station 12-2; Base station 11 is according to the down channel quality indication information from mobile radio station 12-2 that receives; Judge the down channel quality preferably that has of mobile radio station 12-2; Corresponding time-frequency resource allocating is given mobile radio station 12-2 among then that the multiplexing factor is time high frequency resource group FP22, because 13 to 28 SRU can be used among the FP22 in base station 11, then selects time-frequency resource allocating to give mobile radio station 12-2 the SRU of base station 11 from 13 to 28.For mobile radio station 12-3; Base station 11 is according to the down channel quality indication information from mobile radio station 12-3 that receives; Judge the relatively poor down channel quality that has of mobile radio station 12-3, the time-frequency resource allocating among the FP23-1 among then that the multiplexing factor is the lower frequency resource group FP23 is given mobile radio station 12-3.
Alternatively; With mobile radio station 12-2 is example; The step S42 of Fig. 4 can also comprise following step: at first; Base station 11 is according to the down channel quality index signal from mobile radio station 12-2 that receives; Judge among the frequency resource group FP22 corresponding whether available running time-frequency resource is arranged,, then will give mobile radio station 12-2 than the time-frequency resource allocating that this corresponding frequency resource group has among the frequency resource group FP23 of the multiplexing factor of low frequency more if there is not available running time-frequency resource among the FP22 with this down channel quality.
Alternatively, the situation for Fig. 2 or frequency resource shown in Figure 5 are divided can also comprise the continuous and/or discontinuous frequency resource block of physics in each frequency resource group.Alternatively, the discontinuous frequency resource block of physics is for carrying out gained after the conversion according to the 3rd pre-defined rule to the continuous frequency resource block of physics.Need to prove that the particular content of the 3rd pre-defined rule is not limit, as long as the frequency resource block that physics is continuous is transformed to the discontinuous frequency resource block of physics, simultaneously, base station 11 keeps the consistency of conversion with base stations neighboring.For example, as comprising which frequency resource block among the FP23 in the base station 11, then also to comprise these several frequency resource block in the frequency resource group of the correspondence of its adjacent base station.
For example; Frequency resource group FP21 distributes to has the mobile radio station of down channel quality preferably; Then it can comprise the frequency resource block that physics is continuous, and this is because under the down channel quality good conditions, can obtain the scheduling gain through frequency selective scheduling.Frequency resource group FP23 distributes to the mobile radio station with relatively poor down channel quality; Then it can comprise the discontinuous frequency resource block of physics; This is because for the relatively poor mobile radio station of down channel quality; Base station 11 can distribute some discrete frequency resources to send upward signal to mobile radio station, so that obtain frequency diversity, thereby obtains better signal quality.Comprise frequency resource block and the discontinuous frequency resource block of physics that physics is continuous among the frequency resource group FP22, because the down channel quality scope of frequency resource group FP22 correspondence is between the corresponding down channel quality scope of the frequency resource group FP21 down channel quality scope corresponding with frequency resource group FP23.
Owing to comprise the continuous and discontinuous frequency resource block of physics among the frequency resource group FP22; Each mobile radio station both can be given with the time-frequency resource allocating among the frequency resource group FP22 randomly in base station 11, also can give each mobile radio station with the time-frequency resource allocating among the frequency resource group FP22 according to second pre-defined rule.Below the various situations of second pre-defined rule are elaborated.
Ground is without loss of generality; With mobile radio station 12-2 and down channel quality index signal is that downstream signal interference-to-noise ratio (SINR) is an example; The down channel quality scope of the corresponding SINR＞SINR_T1 of FP21 then; The down channel quality scope of the corresponding SINR＜SINR_T2 of FP23, FP22 is corresponding to the down channel quality scope of SINR_T2≤SINR≤SINR_T1, wherein SINR_T1＞SINR_T2.
At first, SINR_T2≤SINR-2≤SINR_T1 is judged according to the down channel quality index signal SINR-2 from mobile radio station 12-2 in base station 11, then confirms to give mobile radio station 12-2 with the time-frequency resource allocating among the frequency resource group FP2.
Then, base station 11 is given mobile radio station 12-2 according to second pre-defined rule with the time-frequency resource allocating among the frequency resource group FP2.
With the traffic delay parameter is example, and then second pre-defined rule is that the more sensitive mobile radio station of traffic delay is given with the discontinuous frequency resource allocation of physics in base station 11, and the frequency resource allocation that physics is continuous is given the more insensitive mobile radio station of traffic delay.Particularly, base station 11 judges according to the type of service of report before the mobile radio station 12-2 whether the business of mobile radio station 12-2 belongs to the more sensitive business of delay.If the business of mobile radio station 12-2 is to postpone more sensitive business, then mobile radio station 12-2 is given with the discontinuous frequency resource allocation of physics among the frequency resource group FP22 in base station 11.If the business of mobile radio station 12-2 is to postpone more insensitive business, then base station 11 frequency resource allocation that physics among the frequency resource group FP22 is continuous is given mobile radio station 12-2.
With the translational speed is example, and then second pre-defined rule is base station 11 with the discontinuous frequency resource allocation of physics to translational speed mobile radio station faster, and the frequency resource allocation that physics is continuous is given the slower mobile radio station of translational speed.Particularly, base station 11 judges whether the translational speed of mobile radio station 12-2 is very fast, and for example translational speed surpasses a predetermined threshold speed.If the translational speed of mobile radio station 12-2 is very fast, then mobile radio station 12-2 is given with the discontinuous frequency resource allocation of physics among the frequency resource group FP22 in base station 11.If the translational speed of mobile radio station 12-2 is slower, then base station 11 frequency resource allocation that physics among the frequency resource group FP22 is continuous is given mobile radio station 12-2.It is multiple that base station 11 estimates that the mode of the translational speed of mobile radio station 12-2 has, and for example base station 11 can be estimated the translational speed of mobile radio station 12-2 according to positioning function; Perhaps base station 11 can be estimated the translational speed of mobile radio station 12-2 according to the time dependent cycle of estimating at certain number of sub-carrier upper signal channel of range value.For a kind of situation in back, the range value of channel estimating changes soon in time, also is that the cycle is short, explains that the translational speed of mobile radio station 12-2 is very fast; The range value of channel estimating changes slowly in time; Also be that the cycle is long; The translational speed that mobile radio station 12-2 is described is slower, and the process of the translational speed of detailed estimation mobile radio station 12-2 can be consulted list of references 1:Doppler spread estimation for OFDM systems usingNewton polynomials; Ali, A.R.; Balalem, A.; Khanzada, T.; Machac, J.; Omar, A.; Radioelektronika, 2008 18th International Conference 24-25April2008Page (s): 1-4.
Fig. 6 shows and according to an embodiment of the present invention the continuous frequency resource block of physics is carried out the sketch map that conversion and frequency resource group are divided.The ground that is without loss of generality is the minimum particle size that the continuous frequency resource of physics is distributed in base station 11 with 4 SRU, be referred to as to survey the resource band (Sounding Resource Band, SRB).
In Fig. 6; Continuous SRU1-4,9-12,17-20,25-28,33-36, the 41-44 of physics constitutes 6 SRB; Be used for the distribution of centralized sounding channel, remaining SRU is that unit is transformed to the discontinuous frequency resource block of physics with SRU, is used for the distribution of distributed sounding channel.The conversion based on SRU shown in Fig. 6 is to be carried out one to remaining SRU and reorders.Need to prove that the order of arranging again shown in Fig. 6 only is an example, in fact, base station 11 can be according in proper order the continuous SRU of physics being arranged arbitrarily.Alternatively, conversion also can be carried out to frequency resource block based on subcarrier in base station 11.
In Fig. 6, whole available frequencies resource is divided into three frequency resource group FP31, FP32 and FP33.Wherein, frequency resource block SRU25-28,33-36 and 41-44 are divided into frequency resource group FP31, are used to distribute to down channel quality those mobile radio stations preferably; Frequency resource block SRU1-4,40,47,48,8,9-12,13,38,31,7,17-20,45,14,22,5 are divided into frequency resource group FP32, are used to distribute to down channel quality time those good mobile radio stations; Frequency resource block SRU23,37,39,21,16,15,30,6,46,32,24,29 is divided into frequency resource group FP33, is used for those relatively poor mobile radio stations of allocation of downlink channel quality.
Wherein, for fear of the interference of minizone, the frequency resource among the FP33 further is divided into three son groups FP33-1, FP33-2 and FP33-3.Wherein, FP33-1 comprises frequency resource block SRU23,37,39,21; FP33-2 comprises frequency resource block SRU16,15,30,6; FP33-3 comprises frequency resource block SRU46,32,24,29.With network topology structure shown in Figure 3 is example, if FP33-1 is used in the sub-district that base station 11 is had jurisdiction over 10, its six adjacent sub-districts are used alternatingly FP33-2 and FP33-3 respectively.If FP33-2 is used in the sub-district that base station 11 is had jurisdiction over 10, then its six adjacent sub-districts are used alternatingly FP33-1 and FP33-3 respectively; If FP33-3 is used in the sub-district that base station 11 is had jurisdiction over 10, then its six adjacent sub-districts are used alternatingly FP33-1 and FP33-2 respectively.
Further, alternatively, the frequency resource block among the FP32 can further be divided into FP32-1, FP32-2 and FP32-3.Wherein, FP32-1 comprises frequency resource block SRU1-4,40,47,48,8; FP32-2 comprises frequency resource block SRU9-12,13,38,31,7; FP32-3 comprises frequency resource block SRU17-20,45,14,22,5.With network topology structure shown in Figure 3 is example, if (FP32-1+FP32-2) used in the sub-district that base station 11 is had jurisdiction over 10, its six adjacent sub-districts are used alternatingly (FP32-2+FP32-3), (FP32-1+FP32-3) respectively, and are as shown in Figure 7.If (FP32-1+FP32-3) used in the sub-district that base station 11 is had jurisdiction over 10, its six adjacent sub-districts are used alternatingly (FP32-2+FP32-3), (FP32-1+FP32-3) respectively.If (FP32-2+FP32-3) used in the sub-district that base station 11 is had jurisdiction over 10, its six adjacent sub-districts are used alternatingly (FP32-1+FP32-2), (FP32-1+FP32-3) respectively.Through partial frequency multiplexing shown in Figure 7, can further reduce presence of intercell interference; Meanwhile, allow neighbor cell to exist under the situation of part interference, also improved the frequency resource utilance.
Alternatively, base station 11 is divided into running time-frequency resource in each frequency resource group through the mode of time division multiplexing, frequency division multiplexing, code division multiplexing or their any combination the sounding channel of a plurality of quadratures.For example; With OFDM is example; A sounding channel can be confirmed as with the 13rd SRU of the 1st OFDM symbol through time-multiplexed mode in base station 11, distributes to mobile radio station 12-2, is used for mobile radio station 12-2 and sends detectable signal; The 13rd SRU of the 2nd OFDM symbol confirmed as another detectable signal, and the mobile radio station of distributing to other is to send detectable signal.For another example, each SRU comprises 18 number of sub-carrier, and a sounding channel can be confirmed as with the 2nd, 8,14 number of sub-carrier of the 9th, 10,11,12 SRU through the mode of frequency division multiplexing in base station 11, distributes to mobile radio station 12-2; A sounding channel is confirmed as with the 3rd, 9,15 number of sub-carrier of 9,10,11,12 SRU in base station 11, distributes to other mobile radio station.
Like this; Through using the method in the foregoing description; Base station 11 can be given the sounding channel or the distributed sounding channel of mobile radio station allocation set Chinese style according to actual needs; The inconsistent problem of the professional frequency distribution of the bearing downlink that has overcome single distribution mechanism in the prior art and caused and the frequency distribution of the sounding channel that carries detectable signal has improved the operational efficiency of system effectively.
More than each method embodiment of the present invention has been carried out detailed description, below be elaborated to being used to the course of work that its mobile radio station branch of having jurisdiction over is used in the resource allocation device of the running time-frequency resource that sends detectable signal in the wireless communication network base station.Fig. 8 shows the structural representation of a such resource allocation device 800.In Fig. 8, resource allocation device 800 comprises receiving system 801, distributor 802 and judgment means 803.Those of ordinary skill in the art will be understood that wherein only receiving system 801, distributor 802 are the necessary means of resource allocation device 800 of the present invention, and judgment means 803 is an option means.
Below in conjunction with Fig. 1, the process that the mobile radio station branch that the resource allocation device 800 that is arranged in base station 11 is had jurisdiction over for base station 11 is used in the running time-frequency resource that sends detectable signal is elaborated.
At first, base station 11 is divided into a plurality of frequency resource groups according to first pre-defined rule frequency resource that is used for its each mobile radio station transmission detectable signal of having jurisdiction over that it is available, and each frequency resource group is corresponding to a mass range of down channel quality.Frequency resource group FP21, FP22 and FP23 as shown in Figure 5, wherein,, the time-frequency resource allocating among the FP21 is given those down channel qualities mobile radio station preferably, also is frequency resource group FP21 correspondence down channel quality preferably.Time-frequency resource allocating among the FP22 is given those down channel qualities time good mobile radio station, also is the corresponding time good down channel quality of frequency resource group FP22.Time-frequency resource allocating among the FP23 is given the relatively poor mobile radio station of those down channel qualities, also is the corresponding relatively poor down channel quality of frequency resource group FP22.Wherein, for fear of the interference of neighbor cell, the frequency resource among the FP23 is divided into three part FP23-1, FP23-2 and FP23-3 again.The implication of first pre-defined rule here is the same, repeats no more at this.
The down channel quality index signal that receiving system 801 receives from each mobile radio station 12; Distributor 802 is given each mobile radio station 12 according to the down channel quality index signal from each mobile radio station 12 with the time-frequency resource allocating in the frequency resource group of correspondence then.For example; The down channel quality index signal that receiving system 801 receives from mobile radio station 12-1; Distributor 802 is according to the down channel quality index signal; The down channel quality of judging mobile radio station 12-1 is better, then will give mobile radio station 12-1 with the corresponding time-frequency resource allocating among down channel quality is corresponding preferably the frequency resource group FP21, is used for mobile radio station 12-1 transmission detectable signal.
Alternatively; Have under the situation of different frequency duplex factor as one in each frequency resource group; Time-frequency resource allocating in distributor 802 the frequency resource group that the multiplexing factor is higher is had the mobile radio station of down channel quality preferably, and the implication again of the multiplexing factor is said.At this moment; Alternatively; Judgment means 803 judges in the corresponding frequency resource group of the down channel quality from mobile radio station 12-1 that receives with receiving system 801 whether available running time-frequency resource is arranged; If do not have available running time-frequency resource in the frequency resource group corresponding with down channel quality, then distributor 802 will have time-frequency resource allocating in the frequency resource group of the multiplexing factor of low frequency more to this mobile radio station 12-1 than this corresponding frequency resource group.
Alternatively, the situation for Fig. 2 or frequency resource shown in Figure 5 are divided can also comprise the continuous and/or discontinuous frequency resource block of physics in each frequency resource group.Alternatively, the discontinuous frequency resource block of physics is for carrying out gained after the conversion according to the 3rd pre-defined rule to the continuous frequency resource block of physics.Need to prove that the particular content of the 3rd pre-defined rule is not limit, as long as the frequency resource block that physics is continuous is split as the discontinuous frequency resource block of physics, simultaneously, base station 11 keeps consistency with base stations neighboring.For example, as comprising which frequency resource block among the FP23 in the base station 11, then also to comprise these several frequency resource block in the frequency resource group of the correspondence of its adjacent base station.
Comprise that in certain resource group under the situation of the continuous and discontinuous frequency resource block of physics, distributor 802 is given corresponding mobile radio station according to second pre-defined rule with the frequency resource allocation in this frequency resource group.
With the traffic delay parameter is example, and then second pre-defined rule is that distributor 802 is given the more sensitive mobile radio station of traffic delay with the discontinuous frequency resource allocation of physics, and the frequency resource allocation that physics is continuous is given the more insensitive mobile radio station of traffic delay.Particularly, giving mobile radio station 12-2 with distributor 802 with the frequency resource allocation among the frequency resource group FP22 is example, and distributor 802 judges according to the type of service of report before the mobile radio station 12-2 whether the business of mobile radio station 12-2 belongs to the more sensitive business of delay.If the business of mobile radio station 12-2 is to postpone more sensitive business, then distributor 802 is given mobile radio station 12-2 with the discontinuous frequency resource allocation of physics among the frequency resource group FP22.If the business of mobile radio station 12-2 is to postpone more insensitive business, then distributor 802 frequency resource allocation that physics among the frequency resource group FP22 is continuous is given mobile radio station 12-2.
With the translational speed is example, and then second pre-defined rule is a distributor 802 with the discontinuous frequency resource allocation of physics to translational speed mobile radio station faster, and the frequency resource allocation that physics is continuous is given the slower mobile radio station of translational speed.Particularly, giving mobile radio station 12-2 with distributor 802 with the frequency resource allocation among the frequency resource group FP22 is example, and distributor 802 judges whether the translational speed of mobile radio station 12-2 is very fast, and for example translational speed surpasses a predetermined threshold speed.If the translational speed of mobile radio station 12-2 is very fast, then distributor 802 is given mobile radio station 12-2 with the discontinuous frequency resource allocation of physics among the frequency resource group FP22.If the translational speed of mobile radio station 12-2 is slower, then distributor 802 frequency resource allocation that physics among the frequency resource group FP22 is continuous is given mobile radio station 12-2.The mode that distributor 802 obtains the translational speed of mobile radio station 12-2 has multiple, for example, confirms the speed of mobile radio station according to the relation of the variation of the range value of channel estimating and changes in amplitude and distance.
Alternatively, distributor 802 can be divided into running time-frequency resource in each frequency resource group the sounding channel of a plurality of quadratures through the mode of time division multiplexing, frequency division multiplexing, code division multiplexing or their any combination.For example; With OFDM is example; Distributor 802 can be confirmed as a sounding channel with the 13rd SRU of the 1st OFDM symbol through time-multiplexed mode, distributes to mobile radio station 12-2, is used for mobile radio station 12-2 and sends detectable signal; The 13rd SRU of the 2nd OFDM symbol confirmed as another detectable signal, and the mobile radio station of distributing to other is to send detectable signal.For another example, each SRU comprises 18 number of sub-carrier, and distributor 802 can be confirmed as a sounding channel with the 2nd, 8,14 number of sub-carrier of the 9th, 10,11,12 SRU through the mode of frequency division multiplexing, distributes to mobile radio station 12-2; Distributor 802 is confirmed as a sounding channel with the 3rd, 9,15 number of sub-carrier of 9,10,11,12 SRU, distributes to other mobile radio station.
Above specific embodiments of the invention is described.Need to prove, the invention is not restricted to the TDD system, so long as the up-downgoing channel has the wireless communication system of reciprocity, method of the present invention is all applicable.In addition, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various modification or modification within the scope of the appended claims.
Claims (14)
1. one kind is used to the method that its mobile radio station branch of having jurisdiction over is used in the running time-frequency resource that sends detectable signal in wireless communication network base station; Wherein, Said base station is divided into a plurality of frequency resource groups according to first pre-defined rule frequency resource that is used for its each mobile radio station transmission detectable signal of having jurisdiction over that it is available; Each frequency resource group is corresponding to a mass range of down channel quality, and this method may further comprise the steps:
A. receive down channel quality index signal from mobile radio station;
B. according to said down channel quality index signal, give said mobile radio station with the corresponding time-frequency resource allocating in the frequency resource group of correspondence;
Wherein, said first pre-defined rule makes base station and adjacent base station coordinate the frequency of utilization resource, avoids producing presence of intercell interference.
2. method according to claim 1, wherein, each frequency resource group has different frequency duplex factor as one, and said step b is further comprising the steps of:
Time-frequency resource allocating in-the frequency resource group that the multiplexing factor is higher is given has the mobile radio station of down channel quality preferably.
3. method according to claim 2, wherein, said step b is further comprising the steps of:
-judge in the frequency resource group corresponding whether available running time-frequency resource is arranged with said down channel quality;
Do not have available running time-frequency resource in the-Ruo frequency resource group corresponding, then will give said mobile radio station than the time-frequency resource allocating that this corresponding frequency resource group has in the frequency resource group of the multiplexing factor of low frequency more with said down channel quality.
4. method according to claim 1 wherein, comprises the continuous and/or discontinuous frequency resource block of physics in said each frequency resource group.
5. method according to claim 4, wherein, if the frequency resource group of said correspondence is the frequency resource group that comprises the continuous and discontinuous frequency resource block of physics, said step b is further comprising the steps of:
-according to said down channel quality index signal, give said mobile radio station with the time-frequency resource allocating in the frequency resource group of said correspondence according to second pre-defined rule, wherein, said second pre-defined rule comprises following each rule:
-give the more sensitive mobile radio station of traffic delay with the discontinuous frequency resource allocation of physics, the frequency resource allocation that physics is continuous is given the more insensitive mobile radio station of traffic delay;
-give translational speed mobile radio station faster with the discontinuous frequency resource allocation of physics, the frequency resource allocation that physics is continuous is given the slower mobile radio station of translational speed.
6. method according to claim 4; Wherein, The discontinuous frequency resource block of said physics is for carrying out gained after the conversion according to the 3rd pre-defined rule to the continuous frequency resource block of physics; Wherein, said the 3rd pre-defined rule frequency resource block that physics is continuous is transformed to the discontinuous frequency resource block of physics.
7. according to claim 2 or 4 described methods, wherein, the running time-frequency resource in said each frequency resource group is divided into the sounding channel of a plurality of quadratures through the mode of time division multiplexing and/or frequency division multiplexing and/or code division multiplexing.
8. one kind is used to the resource allocation device that its mobile radio station branch of having jurisdiction over is used in the running time-frequency resource that sends detectable signal in wireless communication network base station; Wherein, Said base station is divided into a plurality of frequency resource groups according to first pre-defined rule frequency resource that is used for its each mobile radio station transmission detectable signal of having jurisdiction over that it is available; Each frequency resource group is corresponding to a mass range of down channel quality, and this resource allocation device comprises:
Receiving system is used to receive the down channel quality index signal from mobile radio station;
Distributor is used for according to said down channel quality index signal, gives said mobile radio station with the time-frequency resource allocating in the frequency resource group of correspondence;
Wherein, said first pre-defined rule makes base station and adjacent base station coordinate the frequency of utilization resource, avoids producing presence of intercell interference.
9. resource allocation device according to claim 8, wherein, each frequency resource group has different frequency duplex factor as one, and said distributor is used for:
Time-frequency resource allocating in-the frequency resource group that the multiplexing factor is higher is given has the mobile radio station of down channel quality preferably.
10. resource allocation device according to claim 9 wherein, also comprises:
Judgment means is used for judging whether the frequency resource group corresponding with said down channel quality has available running time-frequency resource;
Said distributor also is used for:
Do not have available running time-frequency resource in the-Ruo frequency resource group corresponding, then will give said mobile radio station than the time-frequency resource allocating that this corresponding frequency resource group has in the frequency resource group of the multiplexing factor of low frequency more with said down channel quality.
11. resource allocation device according to claim 8 wherein, comprises the continuous and/or discontinuous frequency resource block of physics in said each frequency resource group.
12. resource allocation device according to claim 11, wherein, if the frequency resource group of said correspondence is the frequency resource group that comprises the continuous and discontinuous frequency resource block of physics, said distributor also is used for:
-according to said down channel quality index signal, give said mobile radio station with the time-frequency resource allocating in the frequency resource group of said correspondence according to second pre-defined rule, wherein, said second pre-defined rule comprises following each rule:
-give the more sensitive mobile radio station of traffic delay with the discontinuous frequency resource allocation of physics, the frequency resource allocation that physics is continuous is given the more insensitive mobile radio station of traffic delay;
-give translational speed mobile radio station faster with the discontinuous frequency resource allocation of physics, the frequency resource allocation that physics is continuous is given the slower mobile radio station of translational speed.
13. resource allocation device according to claim 11; Wherein, The discontinuous frequency resource block of physics is for carrying out gained after the conversion according to the 3rd pre-defined rule to the continuous frequency resource block of physics; Wherein, said the 3rd pre-defined rule frequency resource block that physics is continuous is transformed to the discontinuous frequency resource block of physics.
14. according to claim 9 or 11 described resource allocation devices, wherein, said distributor also is used for:
-running time-frequency resource in said each frequency resource group is divided into the sounding channel of a plurality of quadratures through the mode of time division multiplexing and/or frequency division multiplexing and/or code division multiplexing.
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| WO2005057976A1 (en) * | 2003-12-05 | 2005-06-23 | Qualcomm Incorporated | Systems and methods for adaptively allocating resources between a dedicated reference signal and a traffic signal |
| CN101267252A (en) * | 2007-03-16 | 2008-09-17 | 日本电气株式会社 | Resource allocation control method and device in mobile radio communications system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2005057976A1 (en) * | 2003-12-05 | 2005-06-23 | Qualcomm Incorporated | Systems and methods for adaptively allocating resources between a dedicated reference signal and a traffic signal |
| CN101267252A (en) * | 2007-03-16 | 2008-09-17 | 日本电气株式会社 | Resource allocation control method and device in mobile radio communications system |
| EP1973279A1 (en) * | 2007-03-16 | 2008-09-24 | NEC Corporation | Resource allocation control method and device in mobile radio communications system |
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