CN1954529B - A service converting method in uplink for a WCDMA system - Google Patents

Abstract

A service converting method in uplink for a WCDMA system, comprises: obtain the system current uplink reception total interference Ptot; calculating the service traffic iT1 of T1 type converted from current uplink reception total interference Ptot; calculating the service traffic i'T2 of T2 type converted from current uplink reception total interference Ptot; with the current system load, access 1 T2 type service once more, calculating the system total interference p'tot; calculating the service traffic i'T1, of T1 type converted from total interference P'tot; under given parameters, calculating a converting relation NT2-T1=i'T1-iT1 between T2 type service and T1 type service, i.e. the interference caused by one T2 type service equals to that caused by NT2-T1 T1 type service. The present invention bases on an equivalence relation of uplink interference caused by service access, obtains a converting relation from multiple services to single service, solves the problems that analyze method of a single service system can not apply far a WCDMA system, thus expands the selective scope of analyze method for a WCDMA system.

Description

Service conversion method for uplink of wideband CDMA system

Technical Field

The present invention relates to a Wideband Code Division Multiple Access (WCDMA) system, and more particularly, to a method of converting a mixed service into a single service when the mixed service is carried in the WCDMA system.

Background

Mobile communication has developed very rapidly in recent years and has become a very important part of human life. With the rapid development of the Internet, people's desire for mobile Internet and the continuous application of new services have greatly promoted the development of the third generation mobile communication system (IMT-2000 or 3G) capable of carrying high-speed data services. The cdma technology such as WCDMA is the mainstream technology of the third generation mobile communication system, and because of the requirement of mobile internet access and multimedia service transmission, compared with the second generation mobile communication system such as GSM system which only carries voice service, the cdma system carries the service type which is not a single voice service, but a mixed service including voice and data, i.e. multimedia service, and the service type is roughly divided into four classes (categories) according to the quality of service (quality of service) of the service: the system comprises a session level (conversation level, such as real-time services like telephone service and IP call service), a stream level (streaming class, such as quasi-real-time services like video or audio data), an interactive level (interactive class, such as services like internet browsing, server access and database access), and a background level (background class, such as non-real-time services like background distribution of E-mail, file downloading and measurement report receiving). Considering from the time delay requirement, the time delay requirement of the conversation type service is strictest, and the level is highest; the stream type service has the next requirement on time delay, the interactive type service has the next requirement on time delay, and the background type service has low requirement on time delay, and belongs to the typical non-real-time packet data service. Due to the emergence of these mixed services with different characteristics, many conventional system analysis methods are no longer applicable, such as system capacity estimation, system load degree evaluation, and wireless network planning, etc., and new solutions are required to be proposed.

For the system capacity estimation method, the traditional network carrying single voice service is simpler, and the number of channels which can be provided by the system can represent the limit capacity of the system; while the third generation mobile communication system employs code division multiple access technology, channels thereof are distinguished by code sequences. The users work at the same time and in the same frequency band, and all users in the system interfere with each other, so the capacity of the system is closely related to the interference, the capacity is soft, and the system capacity and load cannot be simply represented by the number of channels, but are related to the interference caused after the users access.

In summary, due to the occurrence of mixed services with different characteristics, the complexity of the third generation mobile communication system carrying mixed services in terms of system capacity analysis, network planning, etc. is greatly increased compared with the network carrying a single voice service. In the WCDMA system, the system analysis and control method under the mixed service condition is generally complex, and is particularly expressed as the uplink admission control method of the system. The traditional admission control method needs to establish a complex mathematical model for mixed services and respectively solve interference power generated by various services, thereby predicting the interference increment generated by the access of the current call request service and finally determining whether to admit the current service. The method is complex to realize and large in calculation amount, in addition, the interference generated by the same type of service access is different at different system load points, and the interference increment and the system load are in a nonlinear relation and are difficult to predict. More importantly, the admission control of the system is a real-time process, the calculation of the admission control judgment by the network is limited in time and must be completed within a few seconds after the user calls, so that the algorithm cannot be too complex and the calculation amount cannot be too large, thereby limiting the traditional admission control method.

In view of the above problems, if the mixed service can be converted into a single service, the system carrying the mixed service can be equivalent to a system carrying a single service, so that not only the system analysis method is greatly simplified, but also some traditional analysis methods for analyzing a single service network can be continuously used. But the problems to be solved include: is data traffic and voice traffic with different characteristics equivalent? How is the translation relationship?

The official publication of documents has not been described about the business conversion method.

Disclosure of Invention

The present invention aims to provide a method for converting uplink service of a WCDMA system, which can convert a mixed service into a single service for analysis, so that the existing method for analyzing a single service system is also used in the WCDMA system, thereby greatly simplifying the system analysis method of the WCDMA system.

The core idea of the service conversion method of the WCDMA system uplink is as follows: after a T1 type service is accessed at a load point with system load being LF, the ascending quantity of the total uplink receiving power of the system caused by power ascending is delta p; if the rising amount of the total uplink received power of the system, which is generated when the N T2 types of services are under the same system load, is Δ p, at the system load LF, 1T 1 service can be converted into N T2 services; n is an integer or a decimal.

The invention relates to a service conversion method of an uplink of a WCDMA system, which comprises the following steps: obtaining the current uplink receiving total interference P of the system_tot(ii) a Calculating the current uplink receiving total interference P_totNumber i converted to T1 type traffic_T1(ii) a Calculating the current uplink receiving total interference P_totNumber i converted to T2 type traffic_T2(ii) a Calculating total system interference P 'generated after 1T 2 type service is accessed again at the current system load level'_tot(ii) a Calculating Total interference P'_totNumber i 'converted to T1 type traffic'_T1(ii) a Calculating the conversion relation N of T2 type service to T1 type service under the condition of given parameters_{T2_T1}＝i′_T1-i_T1I.e. 1T 1 type service access and N_{T2_T1}Trunk generated by T2 type service accessN is equal to N, wherein N ═ N_{T2_T1}。

In the above process, i_T1And i'_T1May be a decimal number.

The invention starts from the essence of power rising of a WCDMA system, obtains the conversion relation of a mixed service to a single service according to the equivalent relation of uplink interference caused by accessing different services, and the service conversion relation is irrelevant to the system load when the services are accessed and is a constant, thereby solving the problem that the existing analysis method of the single service system cannot be applied to the WCDMA system and expanding the selection range of the method for analyzing the WCDMA system. By adopting the invention, the equivalent conversion relation of various services in the network can be calculated in advance, namely, the equivalent conversion relation of 1T 1 type service to a plurality of T2 type services can be calculated, the calculated data are stored in the database, when the service initiates a call request, a simple single service model can be directly adopted to calculate the interference increment according to the equivalent conversion relation, so that the model and the calculation process are greatly simplified, and the calculation speed is greatly improved. The invention can be used for capacity conversion and load estimation when mixed service is accessed.

Drawings

FIG. 1 is a flow chart of a business translation method of the present invention;

fig. 2 is a flow chart illustrating the iterative calculation of the number of mixed services converted into a single service of a certain type.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the accompanying drawings and embodiments.

The principle of the present invention to convert a mixed service into a single service is based on the power ramp and interference equivalence of the uplink. The WCDMA system is a self-interference system due to incomplete orthogonality of channel codes, any other user in the system can be considered as interference for a certain user, and when a new user accesses or a certain user raises its own transmit power due to a deterioration of channel environment, the transmit power of other users in the system is increased, so that the total interference amount in the system is increased, which is a power ramp-up phenomenon. With the increasing number of users in the system or the deterioration of the channel environment, the power ramp will be gradually increased, even the avalanche power ramp occurs, and finally the system is broken down. It can be seen that the power ramp-up of the WCDMA system is a typical non-linear process, and the power increase caused by different types of service accesses is different, and the power increase caused by the same service access is also different at different load points of the system. Therefore, to study the conversion relationship between services from the perspective of interference equivalence, two factors must be considered, namely, the load of the service access point and the service type. The invention calculates the number of different services causing the same interference increment by researching the access of different services on each load point, thereby obtaining the conversion relation among the services, and finally obtaining the conversion result by researching the conversion relation of each service on each load point.

According to the above principle, the basic idea of the invention is: after a T1 type service is accessed at a certain load point of the system (the system load is LF), the amount of rise of the total uplink received power (i.e. total interference) of the system caused is Δ p; if N T2 type services also generate the ascending amount of total uplink received power of a system of delta p when under the same system load, 1T 1 type service can be converted into N T2 type services under the system load; n may be an integer or a decimal. The invention can be implemented in a base station controller RNC.

As shown in fig. 1, first, the uplink total interference power P of the controlled base station is obtained_totSince the base station (Node B) will periodically send the uplink total interference power measured at the antenna port to the base station controller RNC through the measurement report, the base station controller RNC can conveniently inquire the current uplink load condition of the controlled base station,i.e. the total uplink interference power P of the base station_tot. Then, the current interference power P is calculated_totNumber i converted to T1 type traffic_T1，i_T1May be a decimal number; the calculation is converted by the signal-to-noise ratio required by the T1 type service, namely, the current total interference is obtained to be equivalent to the access i in the system_T1A signal-to-noise ratio ofInterference generated by T1 type traffic. Recalculating the current interference power P_totNumber i converted to T2 type traffic_T2The signal-to-noise ratio of T2 type traffic isCalculating the total interference P 'of the system generated after accessing 1T 2 type service at the current system load level'_totI.e. i_T2The + 1T 2 type traffic creates total system interference. Then the total interference P 'at the moment'_totNumber i 'converted to T1 type traffic'_T1，i′_T1May be a decimal number; finally, the conversion relation of T2 type service to T1 type service under the given parameter condition is N_{T2_T1}＝i′_T1-i_T1I.e. 1T 1 type service access and N_{T2_T1}The interference generated by the access of the T2 type service is equivalent, thereby obtaining the equivalent conversion relation of the interference of the T1 type service to the T2 type service.

The load level of the system load point can be expressed in terms of the system load, defining the system load LF

$\mathrm{LF}=\frac{\mathrm{noise}\_\mathrm{rise}-1}{\mathrm{noise}\_\mathrm{rise}};---\left(1\right)$

Wherein,and LF is more than or equal to 0 and less than or equal to 1. According to the formula (1), the uplink received total power (total interference) of the system corresponding to the system load LF from 0 to 60% can be calculated. According to the method shown in fig. 1, the business conversion relation under any system load can be calculated, and it can be found that under the given parameter condition, the business conversion relation is independent of the system load level and is a constant.

The present invention will be specifically described below by taking an example of equivalent conversion from 384kbps service to 12.2kbps service.

When a certain service is accessed into the system independently, the calculation formula of the uplink receiving power is as follows

<math><mrow><mfenced open='{' close=''><mtable><mtr><mtd><msub><mi>p</mi><mi>i</mi></msub><mo>=</mo><mn>101</mn><mi>g</mi><mrow><mo>(</mo><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>B</mi><mi>g</mi></msub></mrow></msup><mo>+</mo><mi>&alpha;&gamma;</mi><mrow><mo>(</mo><mi>i</mi><mo>-</mo><mn>1</mn><mo>)</mo></mrow><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>p</mi><mi>i</mi></msub></mrow></msup><mo>)</mo></mrow><mo>-</mo><mrow><mo>(</mo><msub><mi>P</mi><mi>G</mi></msub><mo>-</mo><mfrac><msub><mi>E</mi><mi>b</mi></msub><msub><mi>N</mi><mn>0</mn></msub></mfrac><mo>)</mo></mrow></mtd><mtd><mi>dBm</mi></mtd></mtr><mtr><mtd><msub><mi>p</mi><mrow><mi>i</mi><mo>_</mo><mi>total</mi></mrow></msub><mo>=</mo><mn>101</mn><mi>g</mi><mrow><mo>(</mo><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>B</mi><mi>g</mi></msub></mrow></msup><mo>+</mo><mi>&alpha;</mi><mo>&times;</mo><mi>&gamma;</mi><mo>&times;</mo><mi>i</mi><mo>&times;</mo><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>P</mi><mi>i</mi></msub></mrow></msup><mo>)</mo></mrow></mtd><mtd><mi>dBm</mi></mtd></mtr></mtable></mfenced><mo>-</mo><mo>-</mo><mo>-</mo><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></mrow></math>

Wherein, i represents the number of services; α denotes a voice activation factor, which is 0.67 for voice traffic and 1.0 for data traffic; γ is a neighbor cell interference ratio, and generally, when the omni-directional antenna and the load of the neighbor cell are relatively uniform, γ is 1.55;representing the signal-to-noise ratio required by various services, and the block error rate BLER is less than 10 in the CASE 3 channel environment^-2Under the conditions of (1) are

${\left(\frac{E_b}{N_0}\right)}_{12.2}=7.2\mathrm{dB},$ ${\left(\frac{E_b}{N_0}\right)}_{64}=3.8\mathrm{dB},$ ${\left(\frac{E_b}{N_0}\right)}_{144}=3.2\mathrm{dB},$ ${\left(\frac{E_b}{N_0}\right)}_{384}=3.6\mathrm{dB};$

p_iThe uplink receiving power value of all users in the system after the current user is accessed is shown, namely the uplink receiving power of the current accessed user is p_iAnd other users in the system cause work due to the current user accessThe uplink received power after the rate ramp is also p_i；

P_GRepresenting processing gains, including spreading gains and coding gains; and is <math><mrow><msub><mi>P</mi><mi>G</mi></msub><mo>=</mo><mn>10</mn><mo>&times;</mo><mi>lg</mi><mrow><mo>(</mo><mfrac><mrow><mn>3840</mn><mi>kcps</mi></mrow><mi>R</mi></mfrac><mo>)</mo></mrow><mo>,</mo></mrow></math> R represents the traffic rate, and the dimension is kbps;

B_grepresenting background noise, and taking the value of-103.157 dBm under the condition of 27 ℃ in a frequency band of 3.84 MHz; p is a radical of_{i_total}Representing the total uplink received power of the system.

Equation (2) is deformed as: <math><mrow><mfenced open='{' close=''><mtable><mtr><mtd><mi>i</mi><mo>=</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>0.1</mn><msub><mi>p</mi><mi>i</mi></msub></mrow></msup><mrow><mo>(</mo><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>p</mi><mrow><mi>i</mi><mo>_</mo><mi>total</mi></mrow></msub></mrow></msup><mo>-</mo><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>B</mi><mi>g</mi></msub></mrow></msup><mo>)</mo></mrow><mo>/</mo><mi>&alpha;&gamma;</mi></mtd></mtr><mtr><mtd><msub><mi>p</mi><mi>i</mi></msub><mo>=</mo><mn>101</mn><mi>g</mi><mrow><mo>(</mo><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>B</mi><mi>g</mi></msub></mrow></msup><mo>+</mo><mi>&alpha;&gamma;</mi><mrow><mo>(</mo><mi>i</mi><mo>-</mo><mn>1</mn><mo>)</mo></mrow><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>p</mi><mi>i</mi></msub></mrow></msup><mo>)</mo></mrow><mo>-</mo><mrow><mo>(</mo><msub><mi>P</mi><mi>G</mi></msub><mo>-</mo><mfrac><msub><mi>E</mi><mi>b</mi></msub><msub><mi>N</mi><mn>0</mn></msub></mfrac><mo>)</mo></mrow></mtd></mtr></mtable></mfenced><mo>.</mo><mo>-</mo><mo>-</mo><mo>-</mo><mrow><mo>(</mo><mn>3</mn><mo>)</mo></mrow></mrow></math>

according to renCalculating the corresponding uplink receiving total interference P according to the formula (1) according to the system load_totThen, the current total received power P is calculated_totConverted to a number of 12.2kbps services, i.e. calculating P_totCorresponding to how many 12.2kbps services would be individually accessed. Let p be_{i_total}＝P_totSubstituting the formula (3) and solving the nonlinear equation set by an iterative method.

The iterative method is as follows: an iterative relationship is first constructed, as shown in equation (4),

<math><mrow><mfenced open='{' close=''><mtable><mtr><mtd><msup><mi>i</mi><mrow><mo>(</mo><mi>k</mi><mo>+</mo><mn>1</mn><mo>)</mo></mrow></msup><mo>=</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>0.1</mn><msubsup><mi>p</mi><mi>i</mi><mrow><mo>(</mo><mi>k</mi><mo>)</mo></mrow></msubsup></mrow></msup><mrow><mo>(</mo><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>p</mi><mrow><mi>i</mi><mo>_</mo><mi>total</mi></mrow></msub></mrow></msup><mo>-</mo><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>B</mi><mi>g</mi></msub></mrow></msup><mo>)</mo></mrow><mo>/</mo><mi>&alpha;&gamma;</mi></mtd></mtr><mtr><mtd><msubsup><mi>p</mi><mi>i</mi><mrow><mo>(</mo><mi>k</mi><mo>+</mo><mn>1</mn><mo>)</mo></mrow></msubsup><mo>=</mo><mn>101</mn><mi>g</mi><mo>[</mo><msup><mn>10</mn><mrow><mn>0.1</mn><msub><mi>B</mi><mi>g</mi></msub></mrow></msup><mo>+</mo><mi>&alpha;&gamma;</mi><mrow><mo>(</mo><msup><mi>i</mi><mrow><mo>(</mo><mi>k</mi><mo>)</mo></mrow></msup><mo>-</mo><mn>1</mn><mo>)</mo></mrow><msup><mn>10</mn><mrow><mn>0.1</mn><msubsup><mi>P</mi><mi>i</mi><mrow><mo>(</mo><mi>i</mi><mo>)</mo></mrow></msubsup></mrow></msup><mo>]</mo><mo>-</mo><mrow><mo>(</mo><msub><mi>P</mi><mi>G</mi></msub><mo>-</mo><mfrac><msub><mi>E</mi><mi>b</mi></msub><msub><mi>N</mi><mn>0</mn></msub></mfrac><mo>)</mo></mrow></mtd></mtr></mtable></mfenced><mo>-</mo><mo>-</mo><mo>-</mo><mrow><mo>(</mo><mn>4</mn><mo>)</mo></mrow></mrow></math>

where k is the number of iterations.

Secondly, selecting an iteration initial value as follows: $\left\{\begin{array}{c}{i}^{\left(0\right)}=0\\ p_i^{\left(0\right)}=B_g-P_G+{\left(\frac{E_b}{N_0}\right)}_{12.2}\end{array}\right.---\left(5\right)$

then, substituting the initial iteration value (5) into the formula (4) to carry out iterative calculation until the errors of the left side and the right side of the two equations in the equation set are both less than 10^-5Then the iteration is considered converged. Assuming convergence after n iterations, then i⁽ⁿ⁾、p_i ⁽ⁿ⁾I.e. the solution to be solved, the process of iteratively solving the system of equations is shown in fig. 2, i⁽ⁿ⁾I.e. the number of services converted to 12.2kbps for the current total power.

Then receiving the total interference P of the current uplink_totAnd required signal-to-noise ratio for 384kbps trafficSubstituting into formula (3) to calculate the total interference P_totThe conversion relation to 384kbps service is obtained to obtain P_totIs equivalent to i₃₈₄Total interference generated when 384kbps services are accessed individually.

Then (i) is calculated according to the formula (2)₃₈₄+1) Total interference P 'generated when 384kbps traffic is switched in individually'_totI.e. the total power of the system after adding 1 384kbps of traffic at the current interference level. The total power P 'is then calculated'_totConvertible intoNumber i 'of 12.2kbps traffic'⁽ⁿ⁾Thus, the equivalence relation N of 384kbps service to 12.2kbps service can be calculated_384-122＝i′⁽ⁿ⁾-i⁽ⁿ⁾I.e. the power increase caused after 1 384kbps service access is equivalent to N_384-122The power increment caused by the access of 12.2kbps voice service, thereby obtaining the conversion relation of 384kbps service to 12.2kbps service at the load point of which the system load is LF.

And calculating the service conversion relation under the loads of other systems, wherein the service conversion relation is independent of the system load level of the service access point and is a constant.

Similarly, other conversion relationships such as 64kbps, 144kbps traffic versus 12.2kbps traffic can be obtained by the above method.

Through a large number of experiments with multiple sets of parameters, it is found that at any load point of the system, the conversion relationship between the mixed service and the single service is a constant, and although the power increment caused by access at different load points is nonlinear, the conversion relationship between the services is constant under the same channel environment parameter condition.

The following table gives a set of service conversion calculation results, and the channel environment parameter conditions are: CASE 3 channel environment, block error rate BLER less than 10^-2γ is 1.55, for 12.2kbps voice traffic, the voice activation factor α is 0.67, and for other data traffic, the voice activation factor α is 1.0.

LF	12.2kbps	64kbps	144kbps	384kbps
					0.000000	1.000000	3.428379	6.362200	15.395219
0.010000	1.000000	3.428386	6.362207	15.395227
					0.020000	1.000004	3.428383	6.362204	15.395224
0.030000	1.000002	3.428381	6.362202	15.395222
					0.040000	1.000001	3.428389	6.362209	15.395231
0.050000	1.000004	3.428382	6.362203	15.395224
					0.060000	1.000001	3.428391	6.362211	15.395235
0.070000	1.000005	3.428383	6.362204	15.395225
					0.080000	1.000016	3.428390	6.362211	15.395236
0.090000	1.000006	3.428383	6.362226	15.395227
					0.100000	1.000015	3.428389	6.362210	15.395237
0.110000	1.000006	3.428403	6.362222	15.395258
					0.120000	1.000014	3.428389	6.362210	15.395238
0.130000	1.000006	3.428400	6.362220	15.395257
					0.140000	1.000013	3.428388	6.362209	15.395239
0.150000	1.000026	3.428397	6.362218	15.395258
					0.160000	1.000012	3.428415	6.362234	15.395242
0.170000	1.000023	3.428396	6.362217	15.395261

0.180000	1.000011	3.428411	6.362232	15.395245
					0.190000	1.000022	3.428395	6.362217	15.395266
0.200000	1.000011	3.428409	6.362231	15.395250
					0.210000	1.000021	3.428395	6.362218	15.395274

0.220000	1.000038	3.428408	6.362231	15.395257
					0.230000	1.000021	3.428396	6.362219	15.395247
0.240000	1.000038	3.428408	6.362233	15.395268
					0.250000	1.000022	3.428429	6.362254	15.395257
0.260000	1.000038	3.428410	6.362235	15.395249
					0.270000	1.000024	3.428431	6.362224	15.395270
0.280000	1.000041	3.428413	6.362240	15.395262
					0.290000	1.000027	3.428435	6.362229	15.395256
0.300000	1.000045	3.428417	6.362247	15.395280
					0.310000	1.000030	3.428406	6.362235	15.395274
0.320000	1.000050	3.428423	6.362256	15.395269
					0.330000	1.000036	3.428412	6.362243	15.395266
0.340000	1.000058	3.428432	6.362235	15.395265
					0.350000	1.000043	3.428420	6.362256	15.395264
0.360000	1.000033	3.428444	6.362246	15.395291
					0.370000	1.000053	3.428430	6.362239	15.395291
0.380000	1.000042	3.428421	6.362263	15.395291
					0.390000	1.000067	3.428446	6.362255	15.395293
0.400000	1.000054	3.428435	6.362249	15.395294
					0.410000	1.000045	3.428428	6.362246	15.395295
0.420000	1.000072	3.428422	6.362272	15.395295
					0.430000	1.000062	3.428448	6.362268	15.395291
0.440000	1.000055	3.428442	6.362266	15.395280
					0.450000	1.000049	3.428437	6.362265	15.395289
0.460000	1.000078	3.428434	6.362266	15.395143

0.470000	1.000072	3.428433	6.362267	15.395145
					0.480000	1.000067	3.428432	6.362270	15.395137
0.490000	1.000065	3.428432	6.362275	15.395141
					0.500000	1.000063	3.428434	6.362281	15.395142
0.510000	1.000063	3.428436	6.362261	15.395138
					0.520000	1.000063	3.428439	6.362269	15.395140
0.530000	1.000065	3.428444	6.362280	15.395132
					0.540000	1.000068	3.428450	6.362267	15.395136
0.550000	1.000072	3.428458	6.362280	15.395135
					0.560000	1.000077	3.428468	6.362272	15.395135
0.570000	1.000085	3.428451	6.362288	15.395129
					0.580000	1.000065	3.428464	6.362284	15.395126
0.590000	1.000074	3.428453	6.362283	15.395125
					0.600000	1.000085	3.428468	6.362285	15.395127

The first column in the table is the system load, and only 0-60% of the cases are listed here, because in an actual system, the admission control threshold of the system is generally 60%; the second column is a test column used for verifying the correctness of the method, the method is adopted to convert the 12.2kbps service per se at each load point of the system, the result is 1, and the method is correct from the calculation result of the second column; the third column is the reduced relationship of 64kbps traffic to 12.2kbps voice traffic, which is 3.4284 at each load point, i.e., 1 64kbps traffic is equivalent to the interference generated by about 3.4 12.2kbps traffic; the fourth and fifth columns are the reduced relationship of 144kbps traffic and 384kbps traffic, respectively, to 12.2kbps voice traffic. From these data, it can be seen that the service conversion relationship is independent of the load point of the service access.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (7)

1. A business conversion method of wideband code division multiple access system uplink, it is characterized in that, when system load is the load point place of LF, inserts the service of a T1 type after the system's uplink receiving total power that causes The amount is Δp; if the total uplink receiving power of the system increases by Δp when N T2 services are accessed under the same system load, then at the system load LF, one T1 service can be converted into N T2 services Business; N is an integer or decimal. 2. the business conversion method of wideband code division multiple access system uplink according to claim 1, is characterized in that, comprises: obtain the current uplink receiving total interference P _tot of system; Calculate current uplink receiving total interference P _tot conversion into the number i _T1 of T1 type services; calculate the current uplink received total interference P _tot converted into the number of T2 type services i _T2 ; calculate the total system load generated after accessing one T2 type service at the current system load level Interference P′ _tot ; Calculate the total interference P′ _tot converted into the number of T1 type services i′ _T1 ; Calculate the conversion relationship between T2 type services and T1 type services under given parameter conditions N _{T2_T1} =i′ _T1 -i _T1 , that is, 1 The interference generated by accessing T1-type services is equivalent to N _{T2_T1} T2-type service accesses, where N=N _{T2_T1} . 3. the service conversion method of wideband code division multiple access system uplink according to claim 2, it is characterized in that, the current uplink receiving total interference P _tot of the described acquisition system is to inquire about a certain load point by the base station controller The current total uplink interference power of the base station is obtained. 4. the business conversion method of wideband code division multiple access system uplink according to claim 2, it is characterized in that, the current uplink reception total interference _P of the described acquisition system can be obtained according to the system load LF, and the calculation formula is

in,

And 0≤LF≤1. 5. the business conversion method of wideband code division multiple access system uplink according to claim 2, it is characterized in that, the formula that described uplink receiving total power is converted into the quantity of certain business separate access is Among them, i represents the number of services; α represents the voice activation factor, for voice services, α=0.67, for data services, α=1.0; γ is the ratio of adjacent cell interference to the total interference of the cell. When the load of adjacent cells is relatively uniform, γ=1.55;

Indicates the signal-to-noise ratio required by various services. Under the condition of CASE 3 channel environment and block error rate BLER<10 ^-2 , there is

p _i represents the uplink received power value of all users in the system after the current user accesses, that is, not only the uplink received power of the currently accessed user is p _i , but also the uplink received power of other users in the system after the power is increased due to the current user access The received power is also p _i ; _PG represents processing gain including spreading gain and coding gain; and R represents the service rate, and the dimension is kbps; B _g represents the background noise, and under the condition of 27 degrees Celsius in the 3.84MHz frequency band, the value is -103.157dBm; p _{i_total} represents the total uplink receiving power of the system. 6. The business conversion method of wideband code division multiple access system uplink according to claim 2, is characterized in that, adopts iterative method to solve the formula that the total power of uplink reception is converted into the quantity of certain business independent access, specifically : First, construct the iteration relation as

Among them, k is the number of iterations; Secondly, select the initial value of iteration:

Then, the initial value is substituted into the iterative relational expression for iterative calculation, until the errors on the left and right sides of the two equations in the equation system are both less than the specified error precision, then the iteration is considered to have converged. 7. The service conversion method for uplink of wideband code division multiple access system according to claim 6, characterized in that the error precision is 10 ^-5 .

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