CN1172473C - Reception control method in code division multiple access mobile communication system - Google Patents

Abstract

The present invention relates to a reception control method in a CDMA mobile communication system, which is a method based on matrix calculation. New users send out call requests for requesting reception, and a wireless network controller carries out reception control composed of reception and rejection. The reception control comprises the following steps: the expression P=(A) #+[-1]. I#-[Inter] of the total power of all switching-in user signals in a cell where the new users exist and in the switching-in time slot; the condition whether an inverse matrix (A) #+[-1] can be solved is judged; when the inverse matrix (A) #+[-1] can not be solved, the system rejects the new users; when the inverse matrix (A) #+[-1] can be solved, the uplink received total power and the downlink emission total power of a base station, and the uplink initial emission power of the new users after the new users are received are further calculated and are compared with a power discrimination standard; when the power discrimination standard is met, the new users are received, if the power identification standard is not met, the new users are refused. The load ratio condition of the users can be met automatically, the open loop power control of the system is reduced, the burden of the wireless network controller is lightened, and the signalling process of the network is reduced.

Description

A kind of acceptance controlling method in the CDMA mobile communication systems

Technical field

The present invention relates to mobile communication technology, relate to a kind of acceptance controlling method in code division multiple access (CDMA) mobile communication system or rather, the operation principle of the inventive method is applicable to all CDMA mobile communication systems.

Background technology

Call acceptance (or access) control (Call Admission Control is called for short CAC) problem is the problem that wired network and wireless network all must solve.

In the mobile communication system, CAC problem to be solved is: when new calling or handover (HO) initiation request, radio network controller (RNC) is admitted according to certain criterion or is refused.After network was admitted new connection, its existing QoS of customer that connects (Quality of Service is called for short QoS) all should be met with the QoS of customer that newly is connected.

CDMA is a kind of modulation and multiple access technique based on spread spectrum communication, in cdma communication system, base station and subscriber equipment use same radio band, as a kind of interference-limited system, its special wireless environment makes the admittance problem become more complicated, how, improve power system capacity to greatest extent, the subject matter that has just become Call Admission Control to solve not influencing under the prerequisite that connects (ongoing) QoS of customer.

Before atm technology occurred, the admittance of cable network control was fairly simple, determined whether admitting new calling by network node according to the situation of occupying of outlet and buffer.After atm technology occurs,, all to consider therefore to make influence to other service-user and admit control to become one of major technique of atm technology to the admittance of any service-user because network will be born the transmission of multiple QoS service.

In N-CDMA (arrowband-code division multiple access) system, because network is mainly born the transmission of single-stage or two levels of traffic, professional admittance can adopt than be easier to implement based on the scheme of thresholding or adopt based on SIR (or uplink and downlink carrier/interface ratio, be carrier power and the ratio of interference power) scheme measured, but under the situation of multi-stage service, these schemes will face many difficulties: because different business has different QOS characteristics, if adopt scheme, a plurality of thresholdings will be set based on thresholding; If adopt scheme, a plurality of SIR standards will be set, thereby make real-time operation become very complicated based on sir measurement.

In the IS-95 cdma system, CAC mostly adopts the admittance scheme based on interference threshold point, often makes threshold value according to the most abominable situation, if all existing users' power all surpasses given thresholding in the current system, then new user will be rejected.This do not have the dynamic characteristic of taking into account system based on the admittance scheme of interference threshold point, and the capacity utilance of system is reduced, and causes the wasting of resources, can not guarantee that in addition all users' SIR parameter can both be met.

In principle, admittance in the static environment is exactly the capacity territory, but for a long time, the research of the capacity of system only is confined to static environment, dynamic environment when admitting Control Study should consider then that static environment is considered handover again also will be considered the operability of scheme.

When the UE that CAC set up, switches and be in connection mode at the initial access of terminal equipment (UE), radio bearer need increase business, according to parameter and Radio Resource operating positions such as QoS, call the judgement that corresponding algorithm is made or admitted or refuses.Under different system features and network operation environment, can adopt different access control schemes.

The performance index of admitting control technology to relate to have call blocking rate, handover blocking rate, cutting off rate etc.Theoretically, the key technology that CDMA relates to is to admitting control all influential, and wherein the most closely-related technology has power control, resource allocation, handover and topological structure.

Referring to Fig. 1, the wireless communication system of TD-SCDMA shown in figure principle structure (only providing the functional module relevant) with technical solution of the present invention.System is made up of a plurality of subscriber equipmenies (UE) 100, a plurality of base station (Node B) 110 and radio network controller (RNC) 120.Subscriber equipment 100 wherein can move in the different districts scope of system.Radio network controller 120 is cores of system, mainly comprises dynamic channel allocation 123, calls out access control 122 and parameter library 121 3 big funtion parts, and the with dashed lines frame goes out.

This system admits the process of control to be: subscriber equipment 100 (UE) sends call request to base station 110 (Node B), has measurement report relevant with access control and carrier/interface ratio parameter in call request; Node B admits control according to the call request of UE to the RNC request, and reports the measurement report relevant with admitting control; RNC is according to Node B carrier/interface ratio parameter and other parameters of system (the Internet resources operating position that UE measures etc.) about the measurement report of UE, UE, judge according to certain algorithm and access criterion, and last differentiation result, comprise and inserting or refusal, return to Node B, return to UE by Node B again.If what return is to admit successful message, then also comprise the adjustment information of transmitting power and the information that Radio Resource is redistributed, determine Initial Trans and the code channel of oneself for subscriber equipment 100 (UE).

In the radio network controller 120, dynamic channel allocation 123 receives the access solicitation message that send base stations 110, and determines the access slot of the higher time slot of priority as this user.Parameter library 121 contains three class parameters: channel model parameter, business model parameter and system model parameter.Parameter library 121 refreshes the parameter in the network according to the measurement report of subscriber equipment 100 and base station 110.Call out access control 122 according to the network parameter in the parameter library 121, in the selected time slot of dynamic channel allocation 123, carry out acceptance judging, and court verdict is returned to dynamic channel allocation 123.Dynamic channel allocation 123 sends the return messages that insert application according to court verdict to base station 110.

Summary of the invention

The objective of the invention is to design a kind of acceptance controlling method for CDMA mobile communication systems, when new customer call being made admittance or refusal judgement, can satisfy all users' SIR parameter, can also directly obtain the Initial Trans that new user inserts all users' in the system of back (comprise and connect user and new user) new power-balance point and obtains to meet new user's carrier/interface ratio condition.

The technical scheme that realizes the object of the invention is such: a kind of acceptance controlling method in the CDMA mobile communication systems, comprise: the call request of control is admitted in new user's request of sending, and has the measurement report relevant with admitting control, new user's carrier/interface ratio parameter and other parameter of system in described call request; The base station is admitted control according to new user's call request to the radio network controller request, and reports the measurement report relevant with admitting control; Radio network controller about new user's measurement report, carrier/interface ratio parameter and other parameter of system of new user, comprises the admittance control of admitting or refusing according to the base station, it is characterized in that the admittance control of described admittance or refusal further comprises:

A. under the assumed condition that new user can insert, get all that comprise in sub-district, new user place, the place access slot by existing subscriber and new user and insert the vector expression P=(A) that subscriber signal power are formed ^-1I _Inter, wherein A is and inserts total number of users and the relevant coefficient matrix of each ownership goal carrier/interface ratio thereof, vectorial I _InterIn the suffered interval of corresponding each user of each component disturb;

B. judge and to find the solution inverse matrix (A) ^-1

C. when not finding the solution inverse matrix (A) ^-1The time, system excludes this new user;

D. when finding the solution inverse matrix (A) ^-1The time, further calculating inserts the uplink transmission power of the up reception gross power in base station, downlink gross power and new user behind the new user, and compares with the power criterion;

E. when satisfying the power criterion, allow to admit, when not satisfying the power criterion, exclude.

In the described steps A, existing subscriber that base station when the expression formula of described all access subscriber signal power comprises uplink situation receives and each user's of new user signal power, give the existing subscriber signal power by base station during with descending situation, be respectively P with each user of new user _u=(A _u) ^-1I _{U_inter}And P _d=(A _d) ^-1I _{D_inter}, u represents up, d represents descending;

Among the described step B, judge respectively and can find the solution inverse matrix (A _u) ^-1(A _d) ^-1

Among the described step C, can not find the solution inverse matrix (A _u) ^-1Or (A _d) ^-1The time, system excludes this new user;

Among the described step D, when finding the solution inverse matrix (A simultaneously _u) ^-1(A _d) ^-1The time, continue to carry out this step.

Method of the present invention, situation according to carrier/interface ratio parameters such as (or SIR) and Radio Resource use, use matrix method (thereby can be described as based on matrix computations CAC method) to calculate all users up received power and the down transmitting power of (comprise and connect user and Xin user), employing is based on the criterion of load (power threshold), the control of admitting or refusing.Adopt each user's target carrier/interface ratio to participate in calculating in the matrix, and all users' carrier/interface ratio is met; Decision rule is target to satisfy the system loading limit, thereby can satisfy the requirement of system loading.

The inventive method has following characteristics: the matrix method that is adopted can directly calculate the new power-balance point that new user inserts all users (comprise and connect user and Xin user) in the system of back; Can directly calculate the Initial Trans that meets new user's carrier/interface ratio condition.Finding the solution subscriber signal power expression P=(A) ^-1I _InterBefore, find the solution the inverse matrix (A) of coefficient matrices A earlier ^-1, in the time can not finding the solution, just refuse, and needn't continue rated output P, make and admit control procedure to simplify.

The advantage of matrix method and power criterion is among the present invention:

Can guarantee to have connected user's carrier/interface ratio parameter, matrix method combines all users' carrier/interface ratio parameter with the calculating of transmitting power, the transmitting power of calculating gained must satisfy user's SIR, thereby has reduced because the new caused cutting off rate of calling out of access; Can reduce the expense of system after inserting.

The inventive method not only calculates the uplink transmission power to new user's down initial transmitting power and new user, also can obtain the existing user's in sub-district, new user place (is in the time slot of place to the TDD system) power-balance point.

Description of drawings

Fig. 1 is the principle structure block diagram of TD-SCDMA wireless communication system;

Fig. 2 is the basic procedure block diagram of acceptance controlling method of the present invention.

Embodiment

CAC method based on matrix embodies a kind of like this thought: each sir value that has connected user and Xin user can calculate with this user's self useful signal intensity, noise, interference (comprising the interval interference of disturbing and this user being caused because of other users' signal strength signal intensity).Consider: the value of noise is very little and can ignore substantially; Interval interference variations is very slow, and (if adopt new technologies such as smart antenna, Multiuser Detection, uplink synchronous, interference value can be very little, and this is embodied in multiple access is disturbed the processing factor-alpha _uα _dAll get less than on 1, if do not adopt these new technologies, then multiple access disturbs and handles the factor and all get 1).So each user's signal power can be represented with the signal power of other users in its carrier/interface ratio, interval interference, the same time slot.

With uplink situation (representing with u) is example, by power expression simultaneous with all users in the same time slot, and arrangement, just can obtain the equation of shape as shown in the formula the coefficient matrices A of (1):

A _u·P _u＝I _{u_inter} (1)

In the formula,

$A_u={\left[\begin{array}{ccccc}{({\mathrm{\α}}_u\·{\mathrm{\γ}}_{u\_1}^T)}^{-1}& -1& -1& \·\·\·& -1\\ -1& {({\mathrm{\α}}_u\·{\mathrm{\γ}}_{u\_2}^T)}^{-1}& -1& \·\·\·& -1\\ -1& -1& {({\mathrm{\α}}_u\·{\mathrm{\γ}}_{u\_3}^T)}^{-1}& \·\·\·& -1\\ \underset{\·}{\overset{\·}{\·}}& \underset{\·}{\overset{\·}{\·}}& \underset{\·}{\overset{\·}{\·}}& \·\·\·& -1\\ -1& -1& -1& \·\·\·& {({\mathrm{\α}}_u\·{\mathrm{\γ}}_{u\_k+1}^T)}^{-1}\end{array}\right]}_{(k+1)\×(k+1)}$

$P_u={(p_{u\_1},p_{u\_2},\·\·\·p_{u\_k},p_{u\_k+1})}_{(k+1)\×1}^T$

$I_{u\_\mathrm{inter}}=\frac{1}{{\mathrm{\α}}_u}\·{(I_{u\_\mathrm{inter}1},I_{u\_\mathrm{inter}2},\·\·\·I_{u\_\mathrm{inter}(k+1)})}_{(k+1)\×1}^T$

When supposing new user's calling arrival, had access to k user in the designated cell assigned timeslot, new user then is k+1 user.In the following formula, α _uBe the processing factor that system disturbs multipath, γ _{U_i} ^TBe i user's up carrier/interface ratio (SIR) desired value (i=1 ..., k+1) relevant with type of service, as voice, video etc., the corresponding constant of a kind of type of service.In the following formula, coefficient matrices A _uThe system that embodied wherein is positioned at the SIR requirement of this user of element representation on the diagonal to the inhibition ability disturbed with to each user's SIR requirement in each row, other element representation systems inhibition ability to disturbing is-1.Vector I _U-interDisturb in the interval of representing the base station to receive, can measure, and for all users, this value can be thought constant.Vector P _uRepresent all users' of base station reception signal power sum.(k+1) * (k+1) represent that this matrix has (k+1) row and (k+1) is listed as, (k+1) * 1 this matrix of expression has (k+1) row and 1 row.T represents this matrix is done the transposition computing in the formula.

Descending with the up thought of finding the solution is identical, is vectorial P _u, for uplink situation, each user's that the expression base station receives signal power; For descending situation, each user's signal power is given in expression by base station.In down link, coefficient matrices A _uEquation in also to consider the path loss factor simultaneously.

Descending situation by the power expression simultaneous with all users in the same time slot, and was put in order when (representing with d), just can obtain the matrix equation of shape as shown in the formula (2):

A _d·P _d＝I _{d_inter} (2)

In the formula,

$A_d={\left[\begin{array}{ccccc}{({\mathrm{\α}}_d\·{\mathrm{\γ}}_{d\_1}^T)}^{-1}& -1& -1& \·\·\·& -1\\ -1& {({\mathrm{\α}}_d\·{\mathrm{\γ}}_{d\_2}^T)}^{-1}& -1& \·\·\·& -1\\ -1& -1& {({\mathrm{\α}}_d\·{\mathrm{\γ}}_{d\_3}^T)}^{-1}& \·\·\·& -1\\ \underset{\·}{\overset{\·}{\·}}& \underset{\·}{\overset{\·}{\·}}& \underset{\·}{\overset{\·}{\·}}& \·\·\·& -1\\ -1& -1& -1& \·\·\·& {({\mathrm{\α}}_d\·{\mathrm{\γ}}_{d\_k+1}^T)}^{-1}\end{array}\right]}_{(j+1)\×(j+1)}$

$P_d={(p_{d\_1},p_{d\_2},\·\·\·p_{d\_j},p_{d\_j+1})}_{(j+1)\×1}^T$

$I_{d\_\mathrm{inter}}=\frac{1}{{\mathrm{\α}}_d}\·{(I_{d\_\mathrm{inter}1}/g_{d\_1},I_{d\_\mathrm{inter}2}/g_{d\_2},\·\·\·I_{d\_\mathrm{inter}(j+1)}/g_{d\_j+1})}_{(j+1)\×1}^T$

When supposing new user's calling arrival, had access to j user in the designated cell assigned timeslot, new user then is j+1 user.In the following formula, α _dThe processing factor (∈ is the symbol of sgn peek value) that ∈ [0 1] disturbs multipath for system, γ _{D_i} ^TBe the desired value of i user's descending carrier/interface ratio (SIR), relevant with type of service, as voice, video etc., the corresponding constant (i=1...j+1) of a kind of type of service.

p _{D_i}The signal power of user i is issued in the base station; g _{D_i}Be from the base station (Node B) to i user's the path loss factor; L _{D_inter}, the i interval interference value (i=1...j+1) that to be i mobile phone users (UE) receive at the access slot of appointment can measure.(j+1) * (j+1) represent that this matrix has (j+1) row and (j+1) is listed as, (j+1) * 1 this matrix of expression has (j+1) row and 1 row.T represents this matrix is done the transposition computing in the formula.

By formula (1) (2), all users' signal power can obtain by finding the solution (3) formula in the same time slot in a certain sub-district:

P＝(A) ^-1·I _inter (3)

If the carrier/interface ratio in the matrix A all is taken as desired value separately, the vectorial P that then obtains will satisfy user's carrier/interface ratio condition automatically.

By the inverse matrix (A) of finding the solution A ^-1, can judge add new user after, whether system can also reach a new dynamic power balance point, if can not find the solution (A) ^-1(being that inverse matrix does not exist), illustrative system can not be admitted this user, excludes; If can find the solution (A) ^-1Whether the transmitting power that also will further judge new user surpasses the maximum transmission power that this user allowed, after judging the new user of access, can the up total received power of base station and descending total transmitting power satisfy the power threshold of setting, under the situation that above-mentioned all conditions all satisfies, just allow to admit this user.In the above-mentioned judgement, in the inverse matrix (A) of judging A ^-1In the process that whether exists, also comprise the judgement respectively under up and descending two kinds of situations, when only the inverse matrix under up, descending two kinds of situations all exists, just then carry out follow-up judgement,, just exclude this new user if there is one not exist.

As inverse matrix (A) ^-1Whether (up, descending) by access criterion of the present invention, allows the judgement of admitting in the time of can both finding the solution.

Below with reference to the application implementation example of the inventive method in TD-SCDMA system (structure among Fig. 1), and further describe the present invention in conjunction with the accompanying drawings.

Referring to Fig. 2, demonstrate the main flow of call Cut-in control method among the present invention among the figure.Call Cut-in control method can be summarized as following steps:

Step 200 receives the DCA order, promptly given CAC time slot and at this moment the crack carry out the order of admission judgment;

Step 201 obtains to have connected in the time slot to be accessed carrier/interface ratio (or SIR) parameter that user and Xin insert the user, and the correlation measure of network;

Step 202 supposes that new user can insert, and calculates with matrix method and inserts all users' (comprise and connect user and Xin user) uplink transmission power afterwards, the down transmitting power of base station and new user's up Initial Trans;

Step 203, all subscriber signal power sums that the base station that calculates is received, the base station compares all users' down transmitting power sum and new user's up Initial Trans and power criterion, allow when satisfying criterion to insert (step 205), refusal when not satisfying criterion (step 204 is waited for and accepted next DCA order).

The power criterion of connection control method of the present invention, should guarantee after inserting new user: 1) base station is no more than given ascending power threshold value to all users' up received power sum, and user's the uplink transmission power uplink transmission power threshold value that is no more than oneself is not less than the minimum emissive power of oneself simultaneously; 2), the base station is no more than given descending power threshold value to all users' down transmitting power sum; 3) up, the descending power of existing subscriber after inserting new user all basis target carrier/interface ratio separately recomputate and obtain.This criterion all is general to all business.

$\underset{i=1}{\overset{k+1}{\mathrm{\&Sigma;}}}{p}_{u\_i}<p_{u\_\mathrm{threshold}}---\left(4\right)$

$\underset{i=1}{\overset{j+1}{\mathrm{\&Sigma;}}}{p}_{d\_j}<p_{d\_\mathrm{threshold}}---\left(5\right)$

$p_{k+1,\min }\&le;\frac{p_{u\_k+1}}{g_{u\_k+1}}\&le;{\mathrm{\&beta;}}_1\&CenterDot;p_{k+1,\max }---\left(6\right)$

p _{U_threshold}/ p _{D_threshold}The power threshold (load thresholding) of representing the downlink gross power of up gross power/base station that the base station receives respectively.p _{K+1_min}Be the minimum emissive power that new user allows, p _{K+1_max}It is the maximum transmission power that new user allows.p _{U_k+1}Be the new subscriber signal power that the base station receives, g _{U_k+1}Be new user's the uplink pathloss factor, β ₁Be the redundancy factor of new user emission power, β ₁P _{K+1, max}It is new user's uplink transmission power threshold value.

Formula (4) (6) is used for up link, and (5) are used for down link.

Connection control method of the present invention adopts based on the up link behind the new user of method calculating access of matrix, the received power and the transmitting power of down link, with the Initial Trans that calculates new user, because the target carrier/interface ratio with all users in the sub-district time slot behind the access user serves as to calculate prerequisite, so the result of calculation that obtains satisfies the carrier/interface ratio condition automatically.If new calling can be access in, then it issues the ascending power of Node B and descending power that Node B issues it all can calculate easily.Adopt method of the present invention, open Loop Power control that can simplified system alleviates the burden of RNC, reduces the signaling procedure of network.

Operation principle based on the matrix computations method of the present invention is suitable for all cdma systems.For the situation of FDD CDMA, owing to do not select the DCA order of time slot to be accessed for new user, then its CAC can directly admit control in designated cell according to method of the present invention (comprising rated output and criterion).

Claims (4)

1. a kind of acceptance controlling method in the CDMA mobile communication systems, comprise: the call request of control is admitted in new user's request of sending, and has the measurement report relevant with admitting control, new user's carrier/interface ratio parameter and other parameter of system in described call request; The base station is admitted control according to new user's call request to the radio network controller request, and reports the measurement report relevant with admitting control; Radio network controller about new user's measurement report, carrier/interface ratio parameter and other parameter of system of new user, comprises the admittance control of admitting or refusing according to the base station, it is characterized in that the admittance control of described admittance or refusal further comprises:

A. under the assumed condition that new user can insert, get all that comprise in sub-district, new user place, the place access slot by existing subscriber and new user and insert the vector expression P=(A) that subscriber signal power are formed ^-1I _Inter, wherein A is and inserts total number of users and the relevant coefficient matrix of each ownership goal carrier/interface ratio thereof, vectorial I _InterIn the suffered interval of corresponding each user of each component disturb;

B. judge and to find the solution inverse matrix (A) ^-1

C. when not finding the solution inverse matrix (A) ^-1The time, system excludes this new user;

D. when finding the solution inverse matrix (A) ^-1The time, further calculating inserts the uplink transmission power of the up reception gross power in base station, downlink gross power and new user behind the new user, and compares with the power criterion;

E. when satisfying the power criterion, allow to admit, when not satisfying the power criterion, exclude.

2. a kind of acceptance controlling method in the CDMA mobile communication systems according to claim 1, it is characterized in that: in the described steps A, existing subscriber that base station when the expression formula of described all access subscriber signal power comprises uplink situation receives and each user's of new user signal power, give the existing subscriber signal power by base station during with descending situation, be respectively P with each user of new user _u=(A _u) ^-1I _U-interAnd P _d=(A _d) ^-1I _D-inter, u represents up, d represents descending;

Among the described step B, judge respectively and can find the solution inverse matrix (A _u) ^-1(A _d) ^-1

Among the described step C, can not find the solution inverse matrix (A _u) ^-1Or (A _d) ^-1The time, system excludes this new user;

Among the described step D, when finding the solution inverse matrix (A simultaneously _u) ^-1(A _d) ^-1The time, continue to carry out this step.

3. a kind of acceptance controlling method in the CDMA mobile communication systems according to claim 2 is characterized in that: in the described steps A, during uplink situation, all users' that coefficient matrix, base station receive signal power and interval the interference are respectively:

$A_u={\left[\begin{array}{ccccc}{\left({\mathrm{\&alpha;}}_u{\&CenterDot;\mathrm{\&gamma;}}_{u\_1}^T\right)}^{-1}& -1& -1& ...& -1\\ -1& {\left({\mathrm{\&alpha;}}_u{\&CenterDot;\mathrm{\&gamma;}}_{u\_2}^T\right)}^{-1}& -1& ...& -1\\ -1& -1& {\left({\mathrm{\&alpha;}}_u{\&CenterDot;\mathrm{\&gamma;}}_{u\_3}^T\right)}^{-1}& ...& -1\\ \underset{\&CenterDot;}{\overset{\&CenterDot;}{\&CenterDot;}}& \underset{.}{\overset{.}{.}}& \underset{.}{\overset{.}{.}}& ...& -1\\ -1& -1& -1& ...& {\left({\mathrm{\&alpha;}}_u{\&CenterDot;\mathrm{\&gamma;}}_{u\_k+1}^T\right)}^{-1}\end{array}\right]}_{(k+1)\&times;(k+1)}$

$P_u={(p_{u\_1},p_{u\_2},\&CenterDot;\&CenterDot;\&CenterDot;p_{u\_k},p_{u\_k+1})}_{(k+1)\&times;1}^T$

$I_{u\_\mathrm{inter}}=\frac{1}{{\mathrm{\&alpha;}}_u}\&CenterDot;{(I_{u\_\mathrm{inte}1},I_{u\_\mathrm{inter}2},\&CenterDot;\&CenterDot;\&CenterDot;I_{u\_\mathrm{inter}(k+1)})}_{(k+1)\&times;1}^T$

K+1 is new user in the formula, α _uBe the processing factor that system disturbs multipath, γ _{U_i} ^TIt is the desired value of i user uplink carrier/interface ratio; p _{U_i}The ascending power of the user i that receives for the base station, I _{U_inter, i}I the user's who receives for the base station uplink interval interference value, i=1...k+1; During descending situation, coefficient matrix, base station are respectively for all users' signal power and interval the interference:

$A_d={\left[\begin{array}{ccccc}{\left({\mathrm{\&alpha;}}_d{\&CenterDot;\mathrm{\&gamma;}}_{d\_1}^T\right)}^{-1}& -1& -1& ...& -1\\ -1& {\left({\mathrm{\&alpha;}}_d{\&CenterDot;\mathrm{\&gamma;}}_{d\_2}^T\right)}^{-1}& -1& ...& -1\\ -1& -1& {\left({\mathrm{\&alpha;}}_d{\&CenterDot;\mathrm{\&gamma;}}_{d\_3}^T\right)}^{-1}& ...& -1\\ \underset{.}{\overset{.}{.}}& \underset{.}{\overset{.}{.}}& \underset{.}{\overset{.}{.}}& ...& -1\\ -1& -1& -1& ...& {\left({\mathrm{\&alpha;}}_d{\&CenterDot;\mathrm{\&gamma;}}_{d\_j+1}^T\right)}^{-1}\end{array}\right]}_{(j+1)\&times;(j+1)}$

$P_d={(p_{d\_1},p_{d\_2},\&CenterDot;\&CenterDot;\&CenterDot;,p_{d\_j},p_{d\_j+1})}_{(j+1)\&times;1}^T$

$I_{d\_\mathrm{inter}}=\frac{1}{{\mathrm{\&alpha;}}_d}\&CenterDot;{(I_{d\_\mathrm{inter}1}/g_{d\_1},I_{d\_\mathrm{inter}2}/g_{d\_2},\&CenterDot;\&CenterDot;\&CenterDot;I_{d\_\mathrm{inter}(j+1)}/g_{d\_j+1})}_{(j+1)\&times;1}^T$

J+1 is new user in the formula, α _dBe the processing factor that system disturbs multipath, γ _{D_i} ^TBe the desired value of i user's descending carrier/interface ratio, p _{D_i}Issue the descending power of user i for the base station; g _{D_i}It is the path loss factor from the base station to i user; I _{D_inter, i}The downlink interval interference value that to be i user receive at the access slot of appointment, i=1...j+1.

4. a kind of acceptance controlling method in the CDMA mobile communication systems according to claim 1 is characterized in that: among the described step D, calculating inserts the up reception gross power in base station behind the new user and compares with the power criterion is the employing formula $\underset{i=1}{\overset{k+1}{\mathrm{\&Sigma;}}}{p}_{u\_i}<p_{u\_\mathrm{threshold}}$ Carry out p _{U_i}Be i user's of base station reception ascending power, i=1...k+1, P _{U_threshold}It is the power threshold of the up reception gross power in base station behind the new user of access who sets; Calculating inserts the base station down total emission power behind the new user and compares with the power criterion is the employing formula $\underset{i=1}{\overset{j+1}{\mathrm{\&Sigma;}}}{p}_{d\_j}<p_{d\_\mathrm{threshold}}$ Carry out p _{D_i}Be the descending power that i user issued in the base station, i=1...j+1, P _{D_threshold}It is the power threshold of the base station down total emission power behind the new user of access who sets; Calculate new user's uplink transmission power, and to compare with the power criterion be the employing formula

$p_{k+1,\min }\&le;\frac{p_{u\_k+1}}{g_{u\_k+1}}\&le;{\mathrm{\&beta;}}_1\&CenterDot;p_{k+1,\max }$ Carry out p _{K+1_min}Be the minimum emissive power that new user allows, P _{K+1_max}Be the maximum transmission power that new user allows, p _{U_k+1}Be the new user uplink power that the base station receives, g _{U_k+1}Be new user's the uplink pathloss factor, β ₁Be the redundancy factor of new user emission power, β _{1pk+1, max}It is new user's uplink transmission power threshold value.

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