CN102469497A - Method for selecting optimum cell portion (CP) of uplink and downlink and base station thereof - Google Patents

Abstract

The invention relates to a method for selecting an optimum cell portion (CP) of uplink and downlink and a base station thereof. The method comprises the following steps: receiving uplink data from user equipment (UE) by the base station; calculating uplink air interface receiving power according to the uplink data; selecting the optimal uplink CP according to the uplink air interface receiving power; estimating UE receiving power according to the uplink air interface receiving power; selecting the optimal downlink CP according to the UE receiving power. In the invention, through distinguishing selection, reporting and application of the optimum CP of the uplink and the downlink, when the optimum CP of the uplink and the downlink is selected, accuracy of the selection of an optimal receiving channel and a sending channel can be guaranteed considering that channel gain of the uplink and downlink of a time division duplexing (TDD) multi-antenna multi-channel system is low so as to guarantee uplink and downlink communication performance. Uplink measurement based on the CP and reliability of admission control of a radio network controller (RNC) can be increased. Calibration, shaping and the like are performed to the antenna so as to achieve an effect of increasing a signal quality of a receiving end. The optimal CP selection of the uplink and the downlink and reporting are simple to be performed. And extra system complexity can not be generated.

Description

Be used to choose method and the base station of the best CP of up-downgoing

Technical field

The present invention relates to communication technique field, relate in particular to a kind of method and base station that is used to choose the best CP of up-downgoing.

Background technology

What at present, the TD SDMA of 3-G (Generation Three mobile communication system) (TD-SCDMA) adopted is TDD (Time Division Duplexing, time division duplex) pattern.In the TDD system, uplink and downlink adopt identical frequency spectrum resource, and the radio wave propagation characteristic of symmetry makes it new technologies such as smart antenna easy to use, reach the purpose that improves systematic function and reduce cost.The TDD transmitter also can estimate the situation of channel fading, as the reference of descending transmission according to the signal that receives simultaneously.Referring to Fig. 1, in the descending transmission flow of TD-SCDMA system, base station (Node B) is many antenna receiving-sendings, and subscriber equipment (UE, User Equipment) is the single antenna transmitting-receiving.Base station side data to be sent are sent to the UE side through each antenna after with different beam shaping factor weightings after ovennodulation, spread spectrum and scrambling.The UE side joint is received the signal from each root antenna of Node B, recovers Node B and issues data.Similarly, after uplink data sending then was UE side antenna transmission data, each root antenna of Node B all received signal, data is merged the processing back detect.

Defined sub-district burst (Cell Portion) notion later in 3GPP (3rd Generation Partnership Project) 25.433 technical specification R7 standards; Allow a sub-district to form by many CP; The subregion of each CP coverage cell exists between the CP and switches the area of coverage.Each CP has an antenna system, can be single antenna, also can be many antennas.Multiaerial system can produce many antenna gains and beam shaping gain at receiving terminal.Node B obtains every antenna weighting factor to each UE through certain algorithm, makes the wave beam that signals down have directivity, points to particular UE adaptively, reaches the purpose that improves systematic function and capacity through the interference that reduces between the UE.

The best CP of TD-SCDMA system requirements physical layer reporting subdistrict in proprietary measurement report message.Because the symmetry of TDD system up-downgoing channel; This best CP has the function of up best CP and descending best CP simultaneously concurrently; Node B as descending transmission reference, and based on the location survey of up reception signal, comprises AOA (Angle of Arrival according to this CP; The angle of arrival) estimation and distance estimations, RNC (Radio Network Controller, radio network controller) termination receive control etc.

Although owing to use same frequency, and TDD system frame length can think that usually less than channel coherence time up-downgoing spatial transmission channel condition is consistent, selects for best CP, in practical application, but has its particularity.Because the influence of factors such as the many antenna gains of CP, beam shaping gain makes that the best CP of up-downgoing is also inconsistent.If do not distinguish use, then can influence some reliabilities based on measurement and the judgement of CP.

Prior art has been ignored the otherness between the best CP of up-downgoing; According to TDD up-downgoing channel symmetry, the receive path of up selection, simultaneously as sendaisle; Do not consider of the influence of the channel difference opposite sex, further possibly influence performance for wireless communications channel selecting.

Summary of the invention

Main purpose of the present invention is to provide a kind of method and base station that is used to choose the best CP of up-downgoing, is intended to distinguish and chooses the best CP of up-downgoing and improve CP reliability of applying and system communication performance.

In order to achieve the above object, the present invention proposes a kind of method that is used to choose the best CP of up-downgoing, it is characterized in that, comprising:

The base station receives the upstream data from UE;

Calculate the ascending idle port received power according to said upstream data, and choose up best CP according to said ascending idle port received power;

Estimate the UE received power according to said ascending idle port received power, and choose descending best CP according to said UE received power.

Preferably, calculate the ascending idle port received power according to said upstream data, and the step of choosing up best CP according to said ascending idle port received power comprises:

The uplink baseband power that receives at each CP according to said upstream data calculation base station;

Said uplink baseband power converted eat dishes without rice or wine, obtain the ascending idle port received power;

Choosing the corresponding CP of maximum ascending idle port received power is up best CP.

Preferably, estimate the UE received power according to said ascending idle port received power, and the step of choosing descending best CP according to said UE received power comprises:

Calculate the path loss of UE according to said ascending idle port received power to each CP of base station;

According to said path loss, downgoing baseband power and descending transmission gain estimation UE received power;

Choosing the corresponding CP of maximum UE received power is descending best CP.

Preferably, this method also comprises:

The base station receives the RRC foundation request that said UE sends;

The base station according to said RRC the request of setting up send carry the best CP of up-downgoing up RACH frame to RNC, carry out up-downgoing by RNC according to the best CP of said up-downgoing and admit control, set up UE and be connected with RRC between the network.

Preferably, said base station according to RRC the request of setting up send carry the best CP of up-downgoing up RACH frame to RNC, carry out up-downgoing by RNC according to the best CP of said up-downgoing and admit control, the RRC step of connecting of setting up between UE and the network comprises:

Up RACH frame is sent to RNC in the base station; The best CP of the detected up-downgoing of report gives RNC in up RACH frame; By the up-downgoing best CP information of RNC, respectively the resource requirement that preparatory admittance is introduced is carried out assessment decisions with disturbing to increase in up-downgoing according to each UE in its network of having preserved;

The base station receives RNC and all admits the Radio Link that sends through the back to set up request in up-downgoing;

The UE radio bearer is set up in the base station, and sends Radio Link and set up response and give RNC, sends RRC by RNC and sets up RRC that notification message gives UE and receive the UE feedback and set up and accomplish message.

Preferably, this method also comprises:

The base station receives the proprietary measurement request that RNC sends;

Feed back proprietary measurement response according to said special measurement request to RNC;

Proprietary measurement report is sent to RNC in the base station, comprises in the said proprietary measurement report according to the AOA value of up best CP correspondence and according to the corresponding transmission code channel power of descending best CP.

The present invention also proposes a kind of base station that is used to choose the best CP of up-downgoing, comprising:

The upstream data receiver module is used to receive the upstream data from UE;

Up best CP chooses module, is used for calculating the ascending idle port received power according to said upstream data, and chooses up best CP according to said ascending idle port received power;

Descending best CP chooses module, is used for estimating the UE received power according to said ascending idle port received power, and chooses descending best CP according to said UE received power.

Preferably, said up best CP chooses module and comprises:

The uplink baseband power calculation unit is used for the uplink baseband power that receives at each CP according to said upstream data calculation base station;

Ascending idle port received power acquiring unit is used for said uplink baseband power converted and eats dishes without rice or wine, and obtains the ascending idle port received power;

Up best CP chooses the unit, and being used to choose the corresponding CP of maximum ascending idle port received power is up best CP.

Preferably, said descending best CP chooses module and comprises:

The path loss calculation unit is used for the path loss according to said ascending idle port received power calculating UE each CP to the base station;

UE received power estimation unit is used for according to said path loss, downgoing baseband power and descending transmission gain estimation UE received power;

Descending best CP chooses the unit, and being used to choose the corresponding CP of maximum UE received power is descending best CP.

Preferably, said base station also comprises: module is set up in the RRC connection;

Said upstream data receiver module also is used to receive the RRC foundation request that UE sends;

Module is set up in said RRC connection; Be used for said upstream data receiver module receive said RRC set up the request back send carry the best CP of up-downgoing up RACH frame to RNC; Carry out up-downgoing by RNC according to the best CP of up-downgoing and admit control, set up UE and be connected with RRC between the network.

Preferably, said RRC connects and sets up module and comprise:

RACH frame transmitting element; Be used to send up RACH frame to RNC; The best CP of the detected up-downgoing of report gives RNC in up RACH frame; By the up-downgoing best CP information of RNC, respectively the resource requirement that preparatory admittance is introduced is carried out assessment decisions with disturbing to increase in up-downgoing according to each UE in its network of having preserved;

Radio Link is set up the request receiving element, is used to receive RNC and all admits the Radio Link that sends through the back to set up request in up-downgoing;

RRC connects and to set up the unit, is used to set up the UE radio bearer, and sends Radio Link and set up response and give RNC, sends RRC by RNC and sets up RRC that notification message gives UE and receive the UE feedback and set up and accomplish message.

Preferably, said base station also comprises:

Proprietary measurement request receiver module is used to receive the proprietary measurement request that RNC sends;

Proprietary measurement responsive feedback module is used for feeding back proprietary measurement response according to said special measurement request to RNC;

Proprietary measurement report module is used for sending proprietary measurement report to RNC, comprises AOA value and the descending best CP corresponding transmission code channel power corresponding according to up best CP in the said proprietary measurement report.

A kind of method and base station that is used to choose the best CP of up-downgoing that the present invention proposes; Through distinguishing choosing, report and using of the best CP of uplink and downlink, when choosing up-downgoing the best CP, consider that the channel gain of many antenna multichannel of TDD system up-downgoing is poor; More can guarantee the accuracy that receive path and sendaisle are selected; Thereby guaranteed the uplink and downlink communication performance, more improved the reliability of admitting control based on the out-hole run of CP and RNC, made other more can reach the effect of raising receiving end signal quality to the calibration of antenna and excipient etc.; And the best CP of up-downgoing choose and report simple, can extra increase system complexity.

Description of drawings

Fig. 1 is that the TD-SCDMA system descending sends sketch map;

Fig. 2 is the method one embodiment schematic flow sheet that the present invention is used to choose the best CP of up-downgoing;

Fig. 3 is that method one embodiment that the present invention is used for choosing the best CP of up-downgoing calculates the ascending idle port received power according to upstream data, and chooses the schematic flow sheet of up best CP according to the ascending idle port received power;

Fig. 4 is that method one embodiment that the present invention is used for choosing the best CP of up-downgoing estimates the UE received power according to the ascending idle port received power, and chooses the schematic flow sheet of descending best CP according to the UE received power;

Fig. 5 is another embodiment schematic flow sheet of method that the present invention is used to choose the best CP of up-downgoing;

Fig. 6 be the present invention be used for choosing the best CP of up-downgoing another embodiment base station of method according to RRC the request of setting up send carry the best CP of up-downgoing up RACH frame to RNC; Carry out up-downgoing by RNC according to the best CP of up-downgoing and admit control, set up the schematic flow sheet that UE is connected with RRC between the network;

Fig. 7 is the another embodiment schematic flow sheet of method that the present invention is used to choose the best CP of up-downgoing;

Fig. 8 is the base station one example structure sketch map that the present invention is used to choose the best CP of up-downgoing;

Fig. 9 is that the up best CP of base station one embodiment that the present invention is used for choosing the best CP of up-downgoing chooses the modular structure sketch map;

Figure 10 is that the descending best CP of base station one embodiment that invention is used for choosing the best CP of up-downgoing chooses the modular structure sketch map;

Figure 11 is another example structure sketch map of base station that the present invention is used to choose the best CP of up-downgoing;

Figure 12 is that another embodiment RRC of base station that the present invention is used for choosing the best CP of up-downgoing connects and sets up the modular structure sketch map;

Figure 13 is the another example structure sketch map in base station that the present invention is used to choose the best CP of up-downgoing.

In order to make technical scheme of the present invention clearer, clear, will combine accompanying drawing to do further to detail below.

Embodiment

Embodiment of the invention solution mainly is through distinguishing choosing, report and using of the best CP of uplink and downlink; When choosing up-downgoing the best CP; The channel gain of considering the up-downgoing of many antenna multichannel of TDD system is poor; Guarantee the accuracy that receive path and sendaisle are selected, thereby guarantee the uplink and downlink communication performance, improve based on the out-hole run of CP and the reliability of RNC admittance control.

The embodiment of the invention relates to employing TDD (time division duplex) duplex mode and has disposed the wireless communication system that many CP exist best CP to select and use, such as TD SDMA (TD-SCDMA) system.

The best CP of TD-SCDMA system requirements physical layer reporting subdistrict in proprietary measurement report message.Because the symmetry of TDD system up-downgoing channel; The best CP that prior art will be chosen has the function of up best CP and descending best CP simultaneously concurrently; Node B is used as descending transmission reference according to this CP; And, comprise that AOA (Angle of Arrival, the angle of arrival) estimation and distance estimations, RNC (Radio Network Controller) termination receive control etc. based on the location survey of up reception signal.

Although owing to use same frequency; And TDD system frame length is usually less than channel coherence time; Can think that up-downgoing spatial transmission channel condition is consistent; But various gain inequalities can have influence on the consistency of up best CP and descending best CP, further possibly influence the reliability of some out-hole run value and RRM.Best CP selects and can select in the received power of eating dishes without rice or wine of each CP based on receiving terminal.For NodeB, the optional maximum several CP of received power that eat dishes without rice or wine of up best CP, descending best CP then need estimate that descending UE selects in the received power of each CP according to the ascending idle port received power.Estimation UE received power need be considered many-sided factor, and like the many antenna gains of CP, beam shaping gain etc., these factors possibly make that all the best CP of up-downgoing is also inconsistent.If do not distinguish use, then can influence some reliabilities based on measurement and the judgement of CP.Be estimated as example with AOA, judge that by the received power of eating dishes without rice or wine up best CP is CP1, and descending best CP possibly be 2, if being AOA based on CP2 estimates, because distance is far away, can produce big deviation, when having refraction and reflection footpath, situation more worsens.

Therefore, be necessary choosing, report and using of the best CP of differentiating uplink and downlink, up best CP is applied to location survey, descending best CP is applied to descending transmission.Similarly, the CP that also should choose based on up reception signal of tracking synchronously is as estimating foundation; Use and time slot interference situation and inequality based on the uplink and downlink resource, admit control also should handle respectively.

As shown in Figure 2, one embodiment of the invention proposes a kind of method that is used to choose the best CP of up-downgoing, comprising:

Step S101, the base station receives the upstream data from UE;

Step S102 calculates the ascending idle port received power according to upstream data, and chooses up best CP according to the ascending idle port received power;

The detailed process of choosing of up best CP is:

Behind the upstream data that receives certain UE, calculate Node B at the uplink baseband power that each CP receives, be made as P _{Bb_ul}(m), the dB of unit.This base band power converted eat dishes without rice or wine, use P _Ul(m) expression, computing formula is following:

P _ul(m)＝P _{bb_ul}(m)-Gain _ul(m)-Agc(m) (1)

Wherein: m=1,2...M, M is the CP number of configuration;

Gain _Ul(m) the up gain of expression passage m comprises that many antennas merge gain, CP receiving gain etc.;

The influence of the AGC (automatic gain control) of Agc (m) expression passage m in order to make the data adapting Base-Band Processing, need be handled through AGC and transform to suitable amplitude range to an antenna data of eating dishes without rice or wine, and the base band received power is converted and need be reduced AGC when eating dishes without rice or wine and influence.Gain _Ul(m) and the obtaining of Agc (m) value, can adopt existing general-purpose algorithm, those skilled in the art understands this algorithm.

When selecting up best CP,, can eat dishes without rice or wine to receive the prominent CP of this UE, i.e. P by Node B to a certain UE _Ul(m) the corresponding CP of maximum is up best CP, and formula is following:

$\mathrm{BestC}{p}_{\mathrm{ul}}=\underset{m}{\mathrm{Arg}}\left(P_{\mathrm{ul}}\left(m\right)\right)---\left(2\right)$

Wherein: m=1,2...M.

Step S103 estimates the UE received power according to the ascending idle port received power, and chooses descending best CP according to the UE received power.

In the present embodiment, Node B ascending idle port received power can further be expressed as:

P _ul(m)＝P _ue-Pathloss(m) (3)

Wherein: P _UeExpression UE transmitted power;

Pathloss (m) expression UE is to the path loss of m CP of Node B.

Can find out from above-mentioned formula (3), though do not know the transmitted power P that the terminal is actual _UeWhat are, but P _Ul(m) can embody the path loss difference of UE fully to each CP of Node B, because the symmetry of TDD system up-downgoing wireless channel, can be according to P _Ul(m) estimate the difference of UE in each CP received power.

Use P _Dl(m) the expression Node B UE that estimates to obtain is in the received power of each CP, available computes:

P _dl(m)＝P _{bb_dl}+Gain _dl(m)-Pathloss(m) (4)

Wherein: P _{Bb_dl}Be the base band transmitted power, identical on each CP;

Gain _Dl(m) be CP ^mDescending transmission gain, comprise the gain of smart antenna excipient, many antenna gains (when like this CP two antennas being arranged, many antenna gains are 3dB), and CP sends gain.Gain _Dl(m) value can adopt existing general-purpose algorithm to obtain.

Further can get by formula (3) (4):

P _dl(m)＝P _{bb_dl}+Gain _dl(m)-(P _ue-P _ul(m))

＝(Gain _dl(m)+P _ul(m))+P _{bb_dl}-P _ue (5)

＝P _{diff_dl}(m)+P _{bb_dl}-P _ue

P in the above-mentioned formula (5) _{Diff_dl}(m) expression P _Dl(m) amount relevant with CP in can be characterized in base band and issue under the identical condition of power P _Dl(m) in the difference of each CP.The CP that this value is big, UE eat dishes without rice or wine received power must be also big.Such as, if P _{Diff_dl}(1)＞P _{Diff_dl}(2), P must be arranged _Dl(1)＞P _Dl(2).

Choose P _Dl(m) the corresponding CP of maximum, that is P _{Diff_dl}(m) the corresponding CP of maximum is descending best CP:

$\mathrm{BestC}{p}_{\mathrm{dl}}=\underset{m}{\arg }\left(\max \left(P_{\mathrm{dl}}\left(m\right)\right)\right)=\underset{m}{\arg }\left(\max \left(P_{\mathrm{diff}\_\mathrm{dl}}\left(m\right)\right)\right)---\left(6\right)$

As shown in Figure 3, step S102 comprises:

Step S1021, the uplink baseband power that receives at each CP according to the upstream data calculation base station;

Step S1022 converts uplink baseband power and eats dishes without rice or wine, and obtains the ascending idle port received power;

Step S1023, choosing the corresponding CP of maximum ascending idle port received power is up best CP.

As shown in Figure 4, step S103 comprises:

Step S1031 calculates the path loss of UE to each CP of base station according to the ascending idle port received power;

Step S1032 is according to path loss, downgoing baseband power and descending transmission gain estimation UE received power;

Step S1033, choosing the corresponding CP of maximum UE received power is descending best CP.

In sum, present embodiment has been revised the best CP cell (Best CellPortions LCR IE) (seeing table (a) and table (b)) in the proprietary measurement report message (DEDICATED MEASUREMENT REPORT) that defines among the 3GPP 25.433.

■IE/Group?Name	Presence	Range
			■Best?Cell?Portions?LCR		l..< maxnoofBestCellPortionsLCR>;
■>;Cell?Portion?LCR?ID	M	INTEGER(0..255....)
			■>;RSCP?Value.	M

(a) former Best Cell Portions LCR IE

■IE/Group?Name	Presence	Range
			■Best?Cell?Portions?LCR		l..< maxnoofBestCellPortionsLCR>;
■>;UL?Cell?Portion?LCR?ID	M	INTEGER(0..255....)
			■>;DL?Cell?Portion?LCR?ID	O	INTEGER(0..255....)
■>;RSCP?Value	M

(b) the Best Cell Portions LCR IE that revises

Present embodiment is divided into descending best CP ID and up best CP ID with the CP ID in the former best CP cell, and received signal code road power measurement values wherein is the measurement result of corresponding up best CP then.

At first Node B selects up best CP according to the ascending idle port received power; Estimate UE afterwards at the descending power that receives, select descending best CP from each CP.With Node B ascending idle port received power is reference value; If certain CP is many antenna arrays; And the employing beam shaping, then add many antenna gains that power adds up and brings, and follow the tracks of the beam shaping gain that interference brings between inhibition UE through wave beam; Add the CP gain, can estimate the power that the UE end eats dishes without rice or wine to receive.The UE maximum CP of received power that eats dishes without rice or wine is descending best CP.

Present embodiment is through distinguishing choosing of the best CP of uplink and downlink; Consider that the channel gain difference of many antenna multichannel of TDD system up-downgoing come in; Be in order to make the selection of receive path and sendaisle more accurate; Guarantee the uplink and downlink communication performance, improve the reliability of admitting control based on the out-hole run of CP and RNC, make other more can reach the effect of raising receiving end signal quality to the calibration of antenna and excipient etc.; Otherwise if the channel selecting mistake, other enhancement techniques based on antenna do not reach the performance improvement of hope; In addition this up best CP choose with report method simple, can extra increase system complexity.

As shown in Figure 5, another embodiment of the present invention proposes a kind of method that is used to choose the best CP of up-downgoing, comprising:

Step S501, the base station receives the upstream data from UE, and this upstream data carries RRC sets up request;

Step S502 calculates the ascending idle port received power according to upstream data, and chooses up best CP according to the ascending idle port received power;

Step S503 estimates the UE received power according to the ascending idle port received power, and chooses descending best CP according to the UE received power;

Step S504, send carry the best CP of up-downgoing up RACH frame to RNC, carry out up-downgoing by RNC according to the best CP of up-downgoing and admit control, set up UE and be connected with RRC between the network.

Step S101, step S102 and step S103 are corresponding identical in above-mentioned steps S501, step S502 and step S503 and the foregoing description, repeat no more at this.

Present embodiment specifically will be applied to the UE access process by best CP through the up-downgoing that step S501, step S502 and step S503 obtain for based on an expanded application instance choosing the best CP of up-downgoing.

In step S504, request is set up according to the RRC (Radio Resource Control, radio resource control) that UE initiates in the base station, sends up RACH frame to RNC, wherein comprises the best CP of up-downgoing of this UE.

RNC has preserved the best CP information of the up-downgoing of existing UE in the network; The best CP information of this up-downgoing reports RNC by Node B through proprietary measurement report; The UE distribution situation of each CP in the grasp network according to the best CP of up-downgoing of these information and access UE, is done assessment decisions to the resource requirement that preparatory admittance is introduced with the interference increase respectively in up-downgoing; If up-downgoing is all admitted and is passed through; Then Node B is given in the request of setting up of RNC transmission Radio Link, and Node B sets up the needed radio bearer of UE, and sends Radio Link foundation response and give RNC; RNC sends RRC and sets up notification message, and expression has been ready to RRC and has connected; UE sends RRC and sets up completion message afterwards, and access process is accomplished.

Present embodiment is through distinguishing choosing, report and using of the best CP of uplink and downlink; When choosing up-downgoing the best CP; The channel gain of considering the up-downgoing of many antenna multichannel of TDD system is poor, more can guarantee the accuracy that receive path and sendaisle are selected, thereby guarantee the uplink and downlink communication performance; More improved the reliability of admitting control based on the RNC of CP; Make other more can reach the effect that improves the receiving end signal quality to the calibration of antenna and excipient etc., and the best CP of up-downgoing choose and report simple, can extra increase system complexity.

As shown in Figure 6, step S504 comprises:

Step S5041; Up RACH frame is sent to RNC in the base station; The best CP of the detected up-downgoing of report gives RNC in up RACH frame; By the up-downgoing best CP information of RNC, respectively the resource requirement that preparatory admittance is introduced is carried out assessment decisions with disturbing to increase in up-downgoing according to each UE in its network of having preserved;

Step S5042 receives RNC and all admits the Radio Link that sends through the back to set up request in up-downgoing;

Step S5043 sets up the UE radio bearer, and sends Radio Link and set up response and give RNC, sends RRC by RNC and sets up RRC that notification message gives UE and receive the UE feedback and set up and accomplish message.

As shown in Figure 7, further embodiment of this invention proposes a kind of method that is used for the best CP of option up-downgoing, comprising:

Step S701, the base station receives the upstream data from UE;

Step S702 calculates the ascending idle port received power according to upstream data, and chooses up best CP according to the ascending idle port received power;

Step S703 estimates the UE received power according to the ascending idle port received power, and chooses descending best CP according to the UE received power;

Step S704, the base station receives the proprietary measurement request that RNC sends;

Step S705 feeds back proprietary measurement response according to proprietary measurement request to RNC;

Step S706 sends proprietary measurement report to RNC, comprises in this proprietary measurement report according to the AOA value of up best CP correspondence and according to the corresponding transmission code channel power of descending best CP.

Step S101, step S102 and step S103 are corresponding identical in above-mentioned steps S701, step S702 and step S703 and the foregoing description, repeat no more at this.

Present embodiment specifically will be applied to proprietary measurement and report flow processs such as AOA by best CP through the up-downgoing that step S701, step S702 and step S703 obtain for based on another expanded application instance of choosing the best CP of up-downgoing.

Is example with AOA with sending the proprietary measurement and report of code channel power, in step S704, step S705 and step S706, at first; RNC sends proprietary measurement request for Node B; Node B receives after the proprietary measurement request that RNC sends, and sends proprietary measurement response message to RNC, simultaneously; NodeB estimates the AOA of each CP; Calculate the transmission code channel power of each CP, AOA value that this up best CP is corresponding and the corresponding transmission code channel power measurement values of descending best CP are issued RNC through proprietary measurement report, thereby realize reporting of the proprietary measurement of AOA.

Present embodiment is through distinguishing choosing, report and using of the best CP of uplink and downlink; When choosing up-downgoing the best CP; The channel gain of considering the up-downgoing of many antenna multichannel of TDD system is poor, more can guarantee the accuracy that receive path and sendaisle are selected, thereby guarantee the uplink and downlink communication performance; More improved based on the AOA of CP with send the proprietary measuring reliability of up-downgoing such as code channel power; Make other more can reach the effect that improves the receiving end signal quality to the calibration of antenna and excipient etc., and the best CP of up-downgoing choose and report simple, can extra increase system complexity.

As shown in Figure 8, one embodiment of the invention proposes a kind of base station that is used to choose the best CP of up-downgoing, and comprising: upstream data receiver module 801, up best CP choose module 802 and descending best CP chooses module 803, wherein:

Upstream data receiver module 801 is used to receive the upstream data from UE;

Up best CP chooses module 802, is used for calculating the ascending idle port received power according to upstream data, and chooses up best CP according to said ascending idle port received power;

The detailed process of choosing of up best CP is:

Behind the upstream data that receives certain UE, calculate Node B at the uplink baseband power that each CP receives, be made as P _{Bb_ul}(m), the dB of unit.This base band power converted eat dishes without rice or wine, use P _Ul(m) expression, computing formula is following:

P _ul(m)＝P _{bb_ul}(m)-Gain _ul(m)-Agc(m) (1)

Wherein: m=1,2...M, M is the CP number of configuration;

Gain _Ul(m) the up gain of expression passage m comprises that many antennas merge gain, CP receiving gain etc.;

The influence of the AGC (automatic gain control) of Agc (m) expression passage m in order to make the data adapting Base-Band Processing, need be handled through AGC and transform to suitable amplitude range to an antenna data of eating dishes without rice or wine, and the base band received power is converted and need be reduced AGC when eating dishes without rice or wine and influence.Gain _Ul(m) and the obtaining of Agc (m) value, can adopt existing general-purpose algorithm, those skilled in the art understands this algorithm.

When selecting up best CP,, can eat dishes without rice or wine to receive the prominent CP of this UE, i.e. P by Node B to a certain UE _Ul(m) the corresponding CP of maximum is up best CP, and formula is following:

$\mathrm{BestC}{p}_{\mathrm{ul}}=\underset{m}{\mathrm{Arg}}\left(P_{\mathrm{ul}}\left(m\right)\right)---\left(2\right)$

Wherein: m=1,2...M.

Descending best CP chooses module 803, is used for estimating the UE received power according to the ascending idle port received power, and chooses descending best CP according to the UE received power.

In the present embodiment, Node B ascending idle port received power can further be expressed as:

P _ul(m)＝P _ue-Pathloss(m) (3)

Wherein: P _UeExpression UE transmitted power;

Pathloss (m) expression UE is to the path loss of m CP of Node B.

Can find out from above-mentioned formula (3), though do not know the transmitted power P that the terminal is actual _UeWhat are, but P _Ul(m) can embody the path loss difference of UE fully to each CP of Node B, because the symmetry of TDD system up-downgoing wireless channel, can be according to P _Ul(m) estimate the difference of UE in each CP received power.

Use P _Dl(m) the expression Node B UE that estimates to obtain is in the received power of each CP, available computes:

P _dl(m)＝P _{bb_dl}+Gain _dl(m)-Pathloss(m) (4)

Wherein: P _{Bb_dl}Be the base band transmitted power, identical on each CP;

Gain _Dl(m) be CP ^mDescending transmission gain, comprise the gain of smart antenna excipient, many antenna gains (when like this CP two antennas being arranged, many antenna gains are 3dB), and CP sends gain.Gain _Dl(m) value can adopt existing general-purpose algorithm to obtain.

Further can get by formula (3) (4):

P _dl(m)＝P _{bb_dl}+Gain _dl(m)-(P _ue-P _ul(m))

＝(Gain _dl(m)+P _ul(m))+P _{bb_dl}-P _ue (5)

＝P _{diff_dl}(m)+P _{bb_dl}-P _ue

P in the above-mentioned formula (5) _{Diff_dl}(m) expression P _Dl(m) amount relevant with CP in can be characterized in base band and issue under the identical condition of power P _Dl(m) in the difference of each CP.The CP that this value is big, UE eat dishes without rice or wine received power must be also big.Such as, if P _{Diff_dl}(1)＞P _{Diff_dl}(2), P must be arranged _Dl(1)＞P _Dl(2).

Choose P _Dl(m) the corresponding CP of maximum, that is P _{Diff_dl}(m) the corresponding CP of maximum is descending best CP:

$\mathrm{BestC}{p}_{\mathrm{dl}}=\underset{m}{\arg }\left(\max \left(P_{\mathrm{dl}}\left(m\right)\right)\right)=\underset{m}{\arg }\left(\max \left(P_{\mathrm{diff}\_\mathrm{dl}}\left(m\right)\right)\right)---\left(6\right)$

As shown in Figure 9, up best CP chooses module 802 and comprises: uplink baseband power calculation unit 8021, ascending idle port received power acquiring unit 8022 and up best CP choose unit 8023, wherein:

Uplink baseband power calculation unit 8021 is used for the uplink baseband power that receives at each CP according to the upstream data calculation base station;

Ascending idle port received power acquiring unit 8022 is used for uplink baseband power converted and eats dishes without rice or wine, and obtains the ascending idle port received power;

Up best CP chooses unit 8023, and being used to choose the corresponding CP of maximum ascending idle port received power is up best CP.

Shown in figure 10, descending best CP chooses module 803 and comprises: path loss calculation unit 8031, UE received power estimation unit 8032 and descending best CP choose unit 8033, wherein:

Path loss calculation unit 8031 is used for the path loss according to ascending idle port received power calculating UE each CP to the base station;

UE received power estimation unit 8032 is used for according to said path loss, downgoing baseband power and descending transmission gain estimation UE received power;

Descending best CP chooses unit 8033, and being used to choose the corresponding CP of maximum UE received power is descending best CP.

Shown in figure 11; Another embodiment of the present invention proposes a kind of base station that is used to choose the best CP of up-downgoing; Comprise: upstream data receiver module 1101, up best CP choose module 1102, descending best CP chooses module 1103 and module 1104 is set up in the RRC connection; Wherein, Upstream data receiver module 1101, up best CP choose module 1102 and descending best CP and choose in module 1103 and the foregoing description upstream data receiver module 801, up best CP and choose module 802 and descending best CP to choose module 803 functional structures corresponding identical, repeat no more at this.

In the present embodiment, upstream data receiver module 1101 is used to receive the RRC foundation request of UE transmission, and this RRC request of setting up is carried in the upstream data of UE transmission;

Module 1104 is set up in the RRC connection; Be used for upstream data receiver module 1101 receive RRC set up the request back send carry the best CP of up-downgoing up RACH frame to RNC; Carry out up-downgoing by RNC according to the best CP of up-downgoing and admit control, set up UE and be connected with RRC between the network.

Present embodiment specifically is applied to the UE access process with the best CP of above-mentioned up-downgoing of obtaining for based on an expanded application instance choosing the best CP of up-downgoing.

In the present embodiment, request is set up according to the RRC that UE initiates in the base station, sends up RACH frame to RNC, and this RACH frame comprises the best CP of up-downgoing of this UE.

RNC has preserved the best CP information of the up-downgoing of existing UE in the network; The best CP information of this up-downgoing reports RNC by Node B through proprietary measurement report; The UE distribution situation of each CP in the grasp network according to the best CP of up-downgoing of these information and access UE, is done assessment decisions to the resource requirement that preparatory admittance is introduced with the interference increase respectively in up-downgoing; If up-downgoing is all admitted and is passed through; Then Node B is given in the request of setting up of RNC transmission Radio Link, and Node B sets up the needed radio bearer of UE, and sends Radio Link foundation response and give RNC; RNC sends RRC and sets up notification message, and expression has been ready to RRC and has connected; UE sends RRC and sets up completion message afterwards, and access process is accomplished.

Shown in figure 12, the RRC connection is set up module 1104 and comprised: best CP report unit 11041, Radio Link are set up and are asked receiving element 11042 and RRC connection to set up unit 11043, wherein:

Best CP report unit 11041; Be used to send up RACH frame to RNC; The best CP of the detected up-downgoing of report gives RNC in up RACH frame; By the up-downgoing best CP information of RNC, respectively the resource requirement that preparatory admittance is introduced is carried out assessment decisions with disturbing to increase in up-downgoing according to each UE in its network of having preserved;

Radio Link is set up request receiving element 11042, is used to receive RNC and all admits the Radio Link that sends through the back to set up request in up-downgoing;

RRC connects and to set up unit 11043, is used to set up the UE radio bearer, and sends Radio Link and set up response and give RNC, sends RRC by RNC and sets up RRC that notification message gives UE and receive the UE feedback and set up and accomplish message.

Shown in figure 13; Further embodiment of this invention proposes a kind of base station that is used to choose the best CP of up-downgoing; Comprise: upstream data receiver module 1301, up best CP choose module 1302, descending best CP chooses module 1303, proprietary measurement request receiver module 1304, proprietary measurement responsive feedback module 1305 and proprietary measurement report module 1306; Wherein: upstream data receiver module 1301, up best CP choose module 1302 and descending best CP and choose in module 1303 and the foregoing description upstream data receiver module 801, up best CP and choose module 802 and descending best CP to choose module 803 functional structures corresponding identical, repeat no more at this.

In the present embodiment, proprietary measurement request receiver module 1304 is used to receive the proprietary measurement request that RNC sends;

Proprietary measurement responsive feedback module 1305 is used for feeding back proprietary measurement response to RNC;

Proprietary measurement report module 1306 is used for sending proprietary measurement report to RNC, comprises in the said proprietary measurement report according to the AOA value of up best CP correspondence and according to the corresponding transmission code channel power of descending best CP.

Present embodiment specifically is applied to proprietary measurement and report flow processs such as AOA with the best CP of above-mentioned up-downgoing of obtaining for based on another expanded application instance of choosing the best CP of up-downgoing.

Is example with AOA with sending the proprietary measurement and report of code channel power, in this enforcement, at first; RNC sends proprietary measurement request for Node B, and Node B receives after the proprietary measurement request that RNC sends, and sends proprietary measurement response message to RNC; Simultaneously; Node B estimates the AOA of each CP, calculates the transmission code channel power of each CP, and AOA value that this up best CP is corresponding and the corresponding transmission code channel power measurement values of descending best CP are issued RNC through proprietary measurement report.

The embodiment of the invention is used to choose method and the base station of the best CP of up-downgoing, through distinguishing choosing, report and using of the best CP of uplink and downlink, rationally chooses descending best CP and up best CP respectively by different criterions, and reports; When choosing up-downgoing the best CP; The channel gain of considering the up-downgoing of many antenna multichannel of TDD system is poor, more can guarantee the accuracy that receive path and sendaisle are selected, thereby guarantee the uplink and downlink communication performance; The out-hole run and the RNC that have more improved based on CP admit the reliability of controlling; Make other more can reach the effect that improves the receiving end signal quality to the calibration of antenna and excipient etc., and the best CP of up-downgoing choose and report simple, can extra increase system complexity.

The above is merely the preferred embodiments of the present invention; Be not so limit claim of the present invention; Every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the present invention.

Claims (12)

1. a method that is used to choose the best CP of up-downgoing is characterized in that, comprising:

The base station receives the upstream data from UE;

Calculate the ascending idle port received power according to said upstream data, and choose up best CP according to said ascending idle port received power;

Estimate the UE received power according to said ascending idle port received power, and choose descending best CP according to said UE received power.

2. method according to claim 1 is characterized in that, calculate the ascending idle port received power according to said upstream data, and the step of choosing up best CP according to said ascending idle port received power comprises:

The uplink baseband power that receives at each CP according to said upstream data calculation base station;

Said uplink baseband power converted eat dishes without rice or wine, obtain the ascending idle port received power;

Choosing the corresponding CP of maximum ascending idle port received power is up best CP.

3. method according to claim 1 is characterized in that, estimate the UE received power according to said ascending idle port received power, and the step of choosing descending best CP according to said UE received power comprises:

Calculate the path loss of UE according to said ascending idle port received power to each CP of base station;

According to said path loss, downgoing baseband power and descending transmission gain estimation UE received power;

Choosing the corresponding CP of maximum UE received power is descending best CP.

4. according to each described method among the claim 1-3, it is characterized in that, also comprise:

The base station receives the RRC foundation request that said UE sends;

The base station according to said RRC the request of setting up send carry the best CP of up-downgoing up RACH frame to RNC, carry out up-downgoing by RNC according to the best CP of said up-downgoing and admit control, set up UE and be connected with RRC between the network.

5. method according to claim 4; It is characterized in that; Said base station according to RRC the request of setting up send carry the best CP of up-downgoing up RACH frame to RNC; Carry out up-downgoing by RNC according to the best CP of said up-downgoing and admit control, the RRC step of connecting of setting up between UE and the network comprises:

Up RACH frame is sent to RNC in the base station; The best CP of the detected up-downgoing of report gives RNC in up RACH frame; By the up-downgoing best CP information of RNC, respectively the resource requirement that preparatory admittance is introduced is carried out assessment decisions with disturbing to increase in up-downgoing according to each UE in its network of having preserved;

The base station receives RNC and all admits the Radio Link that sends through the back to set up request in up-downgoing;

The UE radio bearer is set up in the base station, and sends Radio Link and set up response and give RNC, sends RRC by RNC and sets up RRC that notification message gives UE and receive the UE feedback and set up and accomplish message.

6. according to each described method among the claim 1-3, it is characterized in that, also comprise:

The base station receives the proprietary measurement request that RNC sends;

Feed back proprietary measurement response according to said special measurement request to RNC;

Proprietary measurement report is sent to RNC in the base station, comprises in the said proprietary measurement report according to the AOA value of up best CP correspondence and according to the corresponding transmission code channel power of descending best CP.

7. a base station that is used to choose the best CP of up-downgoing is characterized in that, comprising:

The upstream data receiver module is used to receive the upstream data from UE;

Up best CP chooses module, is used for calculating the ascending idle port received power according to said upstream data, and chooses up best CP according to said ascending idle port received power;

Descending best CP chooses module, is used for estimating the UE received power according to said ascending idle port received power, and chooses descending best CP according to said UE received power.

8. base station according to claim 7 is characterized in that, said up best CP chooses module and comprises:

The uplink baseband power calculation unit is used for the uplink baseband power that receives at each CP according to said upstream data calculation base station;

Ascending idle port received power acquiring unit is used for said uplink baseband power converted and eats dishes without rice or wine, and obtains the ascending idle port received power;

Up best CP chooses the unit, and being used to choose the corresponding CP of maximum ascending idle port received power is up best CP.

9. base station according to claim 7 is characterized in that, said descending best CP chooses module and comprises:

The path loss calculation unit is used for the path loss according to said ascending idle port received power calculating UE each CP to the base station;

UE received power estimation unit is used for according to said path loss, downgoing baseband power and descending transmission gain estimation UE received power;

Descending best CP chooses the unit, and being used to choose the corresponding CP of maximum UE received power is descending best CP.

10. according to each described base station among the claim 7-9, it is characterized in that said base station also comprises: module is set up in the RRC connection;

Said upstream data receiver module also is used to receive the RRC foundation request that said UE sends;

Module is set up in said RRC connection; Be used for said upstream data receiver module receive said RRC set up the request back send carry the best CP of up-downgoing up RACH frame to RNC; Carry out up-downgoing by RNC according to the best CP of up-downgoing and admit control, set up UE and be connected with RRC between the network.

11. base station according to claim 10 is characterized in that, said RRC connection is set up module and is comprised:

RACH frame transmitting element; Be used to send up RACH frame to RNC; The best CP of the detected up-downgoing of report gives RNC in up RACH frame; By the up-downgoing best CP information of RNC, respectively the resource requirement that preparatory admittance is introduced is carried out assessment decisions with disturbing to increase in up-downgoing according to each UE in its network of having preserved;

Radio Link is set up the request receiving element, is used to receive RNC and all admits the Radio Link that sends through the back to set up request in up-downgoing;

RRC connects and to set up the unit, is used to set up the UE radio bearer, and sends Radio Link and set up response and give RNC, sends RRC by RNC and sets up RRC that notification message gives UE and receive the UE feedback and set up and accomplish message.

12., it is characterized in that said base station also comprises according to each described base station among the claim 7-9:

Proprietary measurement request receiver module is used to receive the proprietary measurement request that RNC sends;

Proprietary measurement responsive feedback module is used for feeding back proprietary measurement response according to said special measurement request to RNC;

Proprietary measurement report module is used for sending proprietary measurement report to RNC, comprises AOA value and the descending best CP corresponding transmission code channel power corresponding according to up best CP in the said proprietary measurement report.

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