CN101466139B - Method and system for scheduling high speed ascending packet access business divided antenna - Google Patents
Method and system for scheduling high speed ascending packet access business divided antenna Download PDFInfo
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Abstract
The invention discloses a high-speed uplink package access business antenna-based method, which comprises the following steps: measuring the receiving bandwidth total power of each antenna, measuring the signal interference ratio of each HSUPA UE on each antenna; calculating the current HSUPA UE load of each antenna and the current total load of each antenna; obtaining the HSUPA usable load for each antenna according to the target load, the current total load of the each antenna and the current HSUPA UE load of each antenna; and executing the load distribution for each antenna according to the HSUPA UE condition. The invention also discloses a high-speed uplink grouping access business antenna-based system. The method and the system can accurately deal with the load for each antenna and the load for a moving platform in the high-speed uplink package access business, solves the problem that the overload ratio of certain antenna is bigger or the underload ratio is bigger, and improves the thuoughput and the stability of the system.
Description
Technical field
The present invention relates to communication technical field, especially the method for in Wideband Code Division Multiple Access (WCDMA) (WCDMA:Wideband Code Division Multiple Access) wireless communication system, high speed uplink packet access (HSUPA) business (HSUPA:High-Speed Uplink Packet Access) scheduling carrying out divided antenna being handled.
Background technology
In Wideband Code Division Multiple Access (WCDMA) (WCDMA) wireless communication system, introduced high speed uplink packet access (HSUPA) business (HSUPA), its key technology is that base station (Node B) need be dispatched the uplink load of travelling carriage (UE:User Equipment).The size of load can be weighed with receiving broadband gross power RTWP (Received Total Wideband Power), and the RTWP lifting is big more, and load is just high more.According to 3GPP agreement 25.433, system can be provided with the reference value (Reference Received Total Wide Band Power) of a RTWP and the desired value (Maximum Target Received Total Wide Band Power) of RTWP, can count RTWPref and RTWPtarget respectively.System when wherein RTWPref is equivalent to without any UE receives noise (making an uproar in the end), if the RTWP of current system is RTWPcurrent, then current system load can be expressed as:
L＝(RTWPcurrent-RTWPref)/RTWPcurrent；
By following formula as can be known, when RTWP is lifted to 2 times (3dB) that make an uproar at the end, then system load is 0.5 (promptly 50%), and when RTWP is lifted to 4 times (6dB) that make an uproar at the end, then system load is 0.75 (promptly 75%).The load that RTWPtarget then uses corresponding to the permission system is RTWPref 4 times (6dB) such as RTWPtarget, and then allowing system's working load is 0.75.System divides timing to make RTWP be no more than RTWPtarget at load dispatch as far as possible.The scheduling assigning process of a routine is: Node B calculates the residue disposable load according to the RTWP measurement result.Utilize signal interference ratio SIR (the Signal to Interference Ratio) estimated result of each UE to calculate the load of the consumption of each UE.Again the residue disposable load is distributed to each UE.Usually these load allocating are to calculate at the UE in whole sub-district and the sub-district.Wherein the SIR according to UE estimates that the method for load is:
L＝SIR/(1+SIR)；
Yet in the receive mode of most commercial systems, upward signal is received by many foundation station antenna, and the signal to many antennas in Base-Band Processing merges, and modal is that dual-antenna diversity receives.To the HSUPA scheduler, different antennas has different RTWP in the sub-district, how to determine that the RTWP that cell scheduling needs is a problem; According to prior art, be used for HSUPA scheduling if double antenna RTWP averaged as sub-district RTWP, when the UE signal concentrates on the antenna, occur an antenna easily and transship like this.Be used for the HSUPA scheduling if get RTWP maximum in the double antenna as sub-district RTWP, when a plurality of UE signals concentrate on the different antennae respectively, can cause the UE that concentrates on the low RTWP antenna to can not get sufficient scheduling authorization.That is: the signal of each UE is also different in the distribution situation of each antenna, only relies on total SIR of UE to estimate to distinguish the corresponding relation of the RTWP of the load of UE and each antenna, can cause scheduler to fall into chaos.If according to existing conventional method, can cause the bigger or underload amount of some antenna overload rate bigger because RTWP and SIR can not be rationally corresponding with concrete antenna, cause the instability of system.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method and system of HSUPA divided antenna scheduling in the sub-district that many antennas receive, respectively every antenna being carried out signal interference ratio estimates to scheduler, scheduler is dispatched respectively each antenna, prevents that the bigger or underload amount of overload rate is bigger on the antenna.
In order to solve the problems of the technologies described above, technical scheme of the present invention is achieved in that
The invention provides a kind of scheduling high speed ascending packet access business divided antenna method,
Idiographic flow is:
A: measure the current received bandwidth total power of each antenna, measure the signal interference ratio value of HSUPA UE at each antenna;
B: calculate the current HSUPA UE load of each antenna and the current antenna total load of each antenna;
C: according to targeted loads, the current total load of each antenna and the current HSUPA UE of each antenna load, obtain the HSUPA disposable load of each antenna, and each antenna is carried out load allocating according to the situation of each HSUPA UE.
Preferably, be specially the current reception broadband gross power of measuring each antenna by each antenna radio-frequency module among the above-mentioned steps A.
Preferably, be specially among the above-mentioned steps A by the upward signal to each HSUPA UE, separate path transfer place antenna difference according to it, divided antenna estimates the signal interference ratio value of HSUPA UE at each antenna.
Preferably, above-mentioned steps B is specially: obtain measured value in the described steps A by scheduler, and calculate the current antenna total load of each antenna and the current HSUPA UE load of each antenna.
Preferably, among the above-mentioned steps C each antenna is carried out respectively being specially in the load allocating: carry out load allocating in the signal interference ratio value situation of each antenna according to each HSUPA UE.
Preferably, targeted loads calculates by following steps among the above-mentioned steps C:
Obtain the desired value and the reference value parameter that receives the broadband gross power of the reception broadband gross power of each antenna;
The difference of getting desired value that receives the broadband gross power and the reference value that receives the broadband gross power is divided by the value of the desired value that receives the broadband gross power targeted loads as each antenna;
Preferably, the current antenna total load of above-mentioned each antenna calculates by following steps:
Obtain the reference value parameter of the reception broadband gross power of each antenna;
The difference of getting current reception broadband gross power and the reference value that receives the broadband gross power is divided by the value of the current reception broadband gross power current antenna total load as each antenna.
Preferably, the method for the HSUPA disposable load of each antenna by targeted loads-current total load of each antenna+current HSUPA UE of each antenna load obtains among the above-mentioned steps C.
Preferably, the following computing formula of passing through of the current HSUPA UE load of above-mentioned each antenna calculates:
The HSUPA UE load=HSUPA UE of antenna is in signal interference ratio value/(1+HSUPA UE is in the signal interference ratio value of antenna) of antenna.
The present invention also provides the scheduling high speed ascending packet access business divided antenna system, described system comprises divided antenna high speed uplink packet access (HSUPA) business scheduler, described divided antenna high speed uplink packet access (HSUPA) business scheduler is used to calculate the current HSUPA UE load of each antenna and the total load of each antenna, calculate the HSUPA disposable load of each antenna, and each antenna is carried out load allocating according to the situation of each HSUPA UE; Wherein, the HSUPA disposable load of each antenna obtains by the method for targeted loads-current total load of each antenna+current HSUPA UE of each antenna load.
Preferably, said system also comprises divided antenna signal interference ratio estimation module, is used for divided antenna and estimates the signal interference ratio value of each HSUPA UE at each antenna, and this signal interference ratio value is sent to described minute sector high speed uplink packet access (HSUPA) business scheduler.
Preferably, said system also comprises radio-frequency module, is used to measure the current received bandwidth total power of sector, and this received bandwidth total power is sent to described divided antenna high speed uplink packet access (HSUPA) business scheduler.
Preferably, above-mentioned divided antenna high speed uplink packet access (HSUPA) business scheduler comprises divided antenna load allocating module, described divided antenna load allocating module is used for according to the total load of each antenna and each HSUPA UE load on each antenna the disposable load on each antenna being distributed to each HSUPA UE according to each HSUPA UE in the signal interference ratio situation of each antenna.
The invention is characterized in that the HSUPA UE in the sub-district is carried out the divided antenna signal interference ratio to be estimated, the high speed uplink packet access (HSUPA) business resource is carried out divided antenna calculate and dispatch.
By above-mentioned method, in the receive diversity cell scenario, the correct corresponding load calculation of each antenna solves the big problem of the bigger or underload rate of overload rate on some antenna, has promoted the stability of a system.
Description of drawings
Fig. 1 is the uneven variation diagram of double antenna in the real system
Fig. 2 is a conventional H SUPA dispatching method schematic diagram
Fig. 3 is a kind of preferred embodiment schematic diagram of divided antenna HSUPA dispatching method of the present invention in system
Fig. 4 is the flow chart of divided antenna HSUPA dispatching method of the present invention
Fig. 5 is the design sketch of the inventive method single user embodiment in system
Fig. 6 is the design sketch of the inventive method a kind of multiple-user embodiment in system
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below.According to these accompanying drawings, the technical staff in same field can be easy to realize the present invention.
Fig. 1 is the uneven variation diagram of double antenna in the real system.The cell configuration here two reception antennas, the received power of two reception antennas differs greatly. and abscissa is the time among the figure, unit is the received signal amplitude of certain UE on two antennas for the 10ms. ordinate. as seen from the figure, main collection antenna amplitude was apparently higher than diversity antenna at incipient 15 seconds, difference reaches more than the 6dB on the energy. and middle one section 50 seconds actual variance is smaller, but the above difference of 2dB is also arranged.Next 20 second time then was that energy is bigger on the diversity antenna, more than the high 6dB of main collection antenna.As seen, two antennas can often be in non-equilibrium state, differ greatly sometimes, and in tens of seconds time bigger variation can take place.
Fig. 2 is conventional H SUPA scheduling schematic diagram.In the conventional HSUPA dispatching method, no matter the number of antennas of sub-district how much, the SIR estimated value only provides a value for each UE in each sub-district, in scheduler, calculate the load that this UE takies with this SIR, the RTWP of sub-district is synthetic (such as getting maximum or asking average) value from the RTWP of many antennas also, and scheduler is worth the load of calculation plot with this.Conventional H SUPA dispatching method is that unit is dispatched with the sub-district, and its throughput can be influenced by the antenna imbalance.Such as with asking average method, under the very uneven situation of antenna, scheduler thinks when available resources have all been divided, and the stronger antenna of signal is serious overload in fact, and the operation of system is very unstable in this case.If use peaked situation, under the very uneven situation of antenna, scheduler is thought when resource all divided, just the resource branch on the highest antenna of RTWP is in fact, resource on the antenna has not also been divided in addition, the UE that signal mainly is in other antenna can also obtain more resources in fact, thereby causes the wasting of resources, and throughput is limited.
Fig. 3 is a kind of preferred embodiment schematic diagram of divided antenna HSUPA dispatching method of the present invention in system.
In the multi-antenna receive diversity sub-district, each antenna of base station all has RTWP inequality separately.Compare with existing conventional method, the RTWP of divided antenna scheduler is input as the RTWP of all antennas, then every antenna is calculated total load respectively.The SIR estimator carries out divided antenna to be estimated, and the SIR estimated result of every antenna input divided antenna scheduler, then to the load on every antenna of each UE calculating.The total load of each antenna and the load of each UE on each antenna are sent into divided antenna load allocating module, in this module, according to the total load and the load Distribution of each travelling carriage on each antenna of each antenna, the disposable load on each antenna is distributed to each HSUPA UE.In the divided antenna scheduler, can reasonably handle the uneven situation of antenna like this, every antenna be carried out load calculation and load allocating respectively, thereby make rational use of resources, accurately control load improves throughput.
The present invention also provides a kind of scheduling high speed ascending packet access business divided antenna system, described system comprises divided antenna high speed uplink packet access (HSUPA) business scheduler, be used to calculate the current HSUPA UE load of each antenna and the total load of each antenna, calculate the residue disposable load of each antenna, and each antenna is carried out load allocating according to the situation of each HSUPA UE.
Described system also comprises divided antenna signal interference ratio estimation module, is used for divided antenna and estimates the signal interference ratio value of each HSUPA UE at each antenna, and this signal interference ratio value is sent to described minute sector high speed uplink packet access (HSUPA) business scheduler.Described divided antenna high speed uplink packet access (HSUPA) business scheduler calculates the current mobile station load of HSUPA UE at each antenna according to HSUPA UE in the signal interference ratio value of each antenna.
Described system also comprises radio-frequency module, be used to measure the current received bandwidth total power of sector, and this received bandwidth total power sent to described divided antenna high speed uplink packet access (HSUPA) business scheduler, described divided antenna high speed uplink packet access (HSUPA) business scheduler obtains the current antenna load of this antenna according to described current received bandwidth total power.
Described divided antenna high speed uplink packet access (HSUPA) business scheduler comprises divided antenna load allocating module, described divided antenna load allocating module is used for according to the total load of each antenna and each HSUPA UE load on each antenna the disposable load on each antenna being distributed to each travelling carriage according to each travelling carriage in the signal interference ratio situation of each antenna.
Fig. 4 is the flow chart of divided antenna HSUPA dispatching method of the present invention.
The first step: for each HSUPA UE upward signal, according to the antenna difference of separating the path transfer place, divided antenna is estimated SIR.Radio-frequency module is estimated the RTWP of each root antenna.For the UE that has, only separate path transfer on one or a few antenna therein, then on this one or a few antenna, carry out the SIR estimation respectively with separating the path transfer demodulation result accordingly, other SIR that does not separate on the antenna of path transfer is 0.RTWP is measured by the radio-frequency module of each antenna.
Second step: the UPA scheduler obtains the SIR of all HSUPA UE at each antenna, the UE load of calculating each antenna.The UPA scheduler obtains the RTWP of each antenna, calculates each antenna total load.Usually the UE load calculating method is: Lue=SIR/ (1+SIR), the computational methods of antenna total load are: LAnt=(RTWP-RTWPref)/RTWP.
The 3rd step: by the method for " targeted loads-current HSUPAUE load of the current total load of each antenna+each antenna ", obtain the HSUPA disposable load of each antenna, and, the HSUPA disposable load of each antenna is distributed to each UE according to the SIR of each HSUPAUE distribution at each antenna.
In this divided antenna load allocating, can make full use of the load of every antenna, can guarantee that every antenna all has lower overload rate.
Fig. 5 is the design sketch of the whole bag of tricks single user embodiment in system, be received as example with double antenna, suppose not consider other area interference and non-HSUPA user (being that the HSUPA disposable load equals targeted loads), has only a HSUPA user a (UE) in the sub-district, and this user's signal energy almost all concentrates on the antenna 1, the N that makes an uproar at the bottom of the RTWPref=, RTWPtarget=4*RTWPref.Among the figure, vertically be RTWP value (received signal gross power).Fig. 5 (a) is the result who dispatches as the RTWP of sub-district with RTWP maximum in two antennas in the conventional method, and this method can guarantee all nonoverloads of every antenna, and wherein the RTWP of an antenna reaches RTWPtarget, with regard to Resources allocation no longer to the user.Promptly reach 3 times the end N that makes an uproar, just reached full load at the useful signal Sa1 of UE under the above-mentioned assumed condition on antenna 1.Fig. 5 (b) is the result who dispatches as the RTWP of sub-district with RTWP mean value in two antennas in the conventional method, and this method makes a wherein antenna RTWP overload (promptly obviously above RTWPtarget) probably.Reach 6 times the end N that makes an uproar at the useful signal Sa1 of UE under the above-mentioned assumed condition on antenna 1, just can make average RTWP reach RTWPtarget, i.e. (7+1)/2=4 N that makes an uproar at the end doubly, this moment, antenna 1 seriously transshipped.Fig. 5 (c) is the design sketch of the inventive method, and its effect is identical with Fig. 5 (a) in this case.From this example, the inventive method is asked than traditional double antenna RTWP and is on average carried out the UPA scheduling as sub-district RTWP the obviously more excellent stability of a system is arranged.
Fig. 6 is the design sketch of the whole bag of tricks a kind of multiple-user embodiment in system.On the assumed condition basis of Fig. 5, increasing a HSUPA user b, the signal energy of user b on two antennas is the same.And has identical dispatching priority with original user a.The regulation goal of scheduler is to make these two users' SIR basic identical, and RTWP has all been divided as principle as load resource dispatched.Fig. 6 (a) is the result who dispatches as the RTWP of sub-district with RTWP maximum in two antennas in the conventional method.User a is at the power Sa1=2.133*N of antenna 1 in this case, the power Sb1=Sb2=0.867*N of user b on two antennas, two users' SIR is 1.143, each user's SIR sum is 2.286 in the system, wherein the RTWP of antenna 1 reaches RTWPtarget, and the RTWP of antenna 2 is 1.867*N.Fig. 5 (b) is the result who dispatches as the RTWP of sub-district with RTWP mean value in two antennas in the conventional method, user a is at the power Sa1=3.481*N of antenna 1 in this case, the power Sb1=Sb2=1.260*N of user b on two antennas, two users' SIR is 1.541, each user's SIR sum is 3.082 in the system, wherein the RTWP of antenna 1 has surpassed RTWPtarget, is 5.741*N, and the RTWP of antenna 2 is 2.260*N.Fig. 5 (c) is the design sketch of the inventive method.Similarly, for the divided antenna load allocating, it is basic identical for each user's SIR on each antenna to define regulation goal, and load resource is divided to fall as far as possible.In this example, consistent on the antenna 1 of user a and the SIR of user b, rather than two antenna SIR sum unanimities.Thereby the result who two antenna HSUPA disposable loads (equaling targeted loads) is distributed to two HSUPA users is, Sa1=Sb1=Sb2=1.5*N, the SIR of user a are 0.6, and the SIR of user b is 0.6+1.5=2.1, and two users' SIR sum is 2.7.From this example, each user's of the inventive method SIR sum 2.7 is obviously greater than getting maximum RTWP value 2.286 when dispatching, and means that at all antennas the inventive method has higher throughput all under the situation of nonoverload.Get the average method of each antenna RTWP, though also have higher throughput, system overload is serious, and is very unstable, and greater risk is arranged in actual applications.
In fact, regulation goal can adopt different targets according to different demands, thereby different load allocation methods is arranged.Such as target according to the cell throughout maximum, then in two users' example, can give user b all resource allocations, such two antennas can reach full load, but can cause user a not served timely like this.Only illustrate above, during superincumbent divided antenna scheduling distributed, user b obtained the double-antenna receiving diversity gain, than user a bigger throughput is arranged, and is a more rational result.
According to last surface analysis, visible the inventive method and device can be made rational use of resources in the application of receive diversity sub-district, and accurately control load improves throughput.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (11)
1. a scheduling high speed ascending packet access business divided antenna method is characterized in that, said method comprising the steps of:
A measures the received bandwidth total power of each antenna, measures the signal interference ratio value of each HSUPA UE at each antenna;
B calculates the current HSUPA UE load of each antenna and the current antenna total load of each antenna;
C obtains the HSUPA disposable load of each antenna according to targeted loads, the current total load of each antenna and the current HSUPA UE of each antenna load, and according to the situation of each HSUPA UE each antenna is carried out load allocating; Wherein, the HSUPA disposable load of each antenna obtains by the method for targeted loads-current total load of each antenna+current HSUPA UE of each antenna load.
2. scheduling high speed ascending packet access business divided antenna method according to claim 1 is characterized in that, is specially the current reception broadband gross power of measuring each antenna by each antenna radio-frequency module in the described steps A.
3. scheduling high speed ascending packet access business divided antenna method according to claim 1, it is characterized in that, be specially in the described steps A by the upward signal to each HSUPA UE, separate path transfer place antenna difference according to it, divided antenna estimates the signal interference ratio value of HSUPA UE at each antenna.
4. scheduling high speed ascending packet access business divided antenna method according to claim 1, it is characterized in that, described step B is specially: obtain measured value in the described steps A by scheduler, and calculate the current antenna total load of each antenna and the current HSUPA UE load of each antenna.
5. scheduling high speed ascending packet access business divided antenna method according to claim 1, it is characterized in that, among the described step C each antenna is carried out respectively being specially in the load allocating: carry out load allocating in the signal interference ratio value situation of each antenna according to each HSUPA UE.
6. scheduling high speed ascending packet access business divided antenna method according to claim 1 is characterized in that, targeted loads calculates by following steps among the described step C:
Obtain the desired value and the reference value parameter that receives the broadband gross power of the reception broadband gross power of each antenna;
The difference of getting desired value that receives the broadband gross power and the reference value that receives the broadband gross power is divided by the value of the desired value that receives the broadband gross power targeted loads as each antenna.
7. scheduling high speed ascending packet access business divided antenna method according to claim 1 is characterized in that, the current antenna total load of described each antenna calculates by following steps:
Obtain the reference value parameter of the reception broadband gross power of each antenna;
The difference of getting current reception broadband gross power and the reference value that receives the broadband gross power is divided by the value of the current reception broadband gross power current antenna total load as each antenna.
8. scheduling high speed ascending packet access business divided antenna method according to claim 4 is characterized in that, the following computing formula of passing through of the current HSUPA UE load of described each antenna calculates:
The HSUPA UE load=HSUPA UE of antenna is in signal interference ratio value/(1+HSUPAUE is in the signal interference ratio value of antenna) of antenna.
9. a scheduling high speed ascending packet access business divided antenna system is characterized in that, described system comprises:
Divided antenna signal interference ratio estimation module is used for divided antenna and estimates the signal interference ratio value of each HSUPA UE at each antenna, and this signal interference ratio value is sent to divided antenna high speed uplink packet access (HSUPA) business scheduler;
Described divided antenna high speed uplink packet access (HSUPA) business scheduler is used to calculate the current HSUPA UE load of each antenna and the total load of each antenna, calculates the residue disposable load of each antenna, and according to the situation of each HSUPA UE each antenna is carried out load allocating; Wherein, the HSUPA disposable load of each antenna obtains by the method for targeted loads-current total load of each antenna+current HSUPA UE of each antenna load.
10. system as claimed in claim 9 is characterized in that described system also comprises radio-frequency module, is used to measure the current received bandwidth total power of antenna, and this received bandwidth total power is sent to described divided antenna high speed uplink packet access (HSUPA) business scheduler.
11. system according to claim 9, it is characterized in that, described divided antenna high speed uplink packet access (HSUPA) business scheduler comprises divided antenna load allocating module, described divided antenna load allocating module is used for according to the total load of each antenna and each HSUPA UE load on each antenna the disposable load on each antenna being distributed to each HSUPA UE according to each HSUPA UE in the signal interference ratio situation of each antenna.
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| WO2014113950A1 (en) * | 2013-01-24 | 2014-07-31 | 华为技术有限公司 | Method and device for controlling uplink load |
| US20160088522A1 (en) * | 2013-06-18 | 2016-03-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and Apparatus in a Base Station for Controlling Communication Resources to a Plurality of Antenna Sites of the Base Station |
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Inventor after: Li Xiaona Inventor after: Huo Mingguang Inventor after: Jin Haitang Inventor after: Li Jinfeng Inventor after: Li Qin Inventor before: Ding Jiewei Inventor before: Wang Chen |
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