CN101193411A - Network optimization method - Google Patents

Abstract

The invention discloses a method for optimizing a network. The method includes the following steps: step 202, traffics of at least a communication resource for calling and switching are accounted respectively; step 204, the network is optimized according to the accounted traffics. Through the invention, coverage of a wireless network can be optimized reasonably; an accurate balance can be kept between obtaining more accessed users and ensuring talking quality of the accessed users.

Description

Network optimized approach

Technical field

The present invention relates to the communications field, relate more specifically to a kind of network optimized approach.

Background technology

The communication process of cellular communication system has been shown among Fig. 1.As can be seen from Figure 1, in communication system, base station transceiver (Base Station Transceiver Subsystem, abbreviation BTS), base control (Base Station Control, abbreviation BSC), reaching public switch telephone network (Public Switched Telephone Network is called for short PSTN) is the valuable source of finishing communication in the communication system.Resource is a very important role in communication system, thus be the problem that equipment vendor and operator show great attention to for the utilization rate of resource always, and for the taking of resource, industry all quantizes resource occupation with telephone traffic.

In wireless telecommunication system, use the time of resource and the ratio of unit interval to obtain the telephone traffic that people need by a user often, thereby weigh the situation that takies of current resource.

But along with the development of third generation mobile, the new revolution that most characteristic cdma system brings to communication, wherein, the most key soft hand-off has brought very big raising for speech quality and conversation stability.But, because soft hand-off makes a user can take a plurality of resources in some time period, the computation schema of calculating single resource telephone traffic for original being used to has brought new difficulty, so need calculate when under the state of this soft handover, conversing the telephone traffic of CU with a kind of new method.

Summary of the invention

One or more problems in view of above-mentioned the present invention proposes a kind of network optimized approach, accurately, reasonably calculating user's occupying system resources situation in whole communication process, thus convenience networks planning and optimizing.

According to an aspect of the present invention, proposed a kind of network optimized approach, this method may further comprise the steps: S202, add up at least a communication resource respectively and be used to the telephone traffic of calling out and switching; And S204, carry out the network optimization according to the telephone traffic of statistics.

Wherein, the communication resource comprises following at least a: Channel Elements and WalshCode.

Wherein, in step S202, do not carry out in the user's communication process under the situation of soft handover, the telephone traffic that the communication resource is used to call out is T.

Carry out in the user's communication process under the situation of soft handover, the telephone traffic that Channel Elements is used to call out is T/n, and the telephone traffic that Channel Elements is used to switch is

Wherein, T is the duration of call, and n is the quantity of the Channel Elements of CU.

Under situation about having on the Channel Elements corresponding to the Traffic Channel of im WalshCode, the telephone traffic that WalshCode is used to call out is

The telephone traffic that WalshCode is used to switch is

/ im.The telephone traffic that WalshCode is used for More Soft Handoff is

$T-(\frac{T}{n}/\mathrm{im})-((T-\frac{T}{n})/\mathrm{im}).$

Network optimized approach according to the present invention is used for the cdma wireless connecting system.

By the present invention, the telephone traffic of CE and WalshCode can be calculated each BTS and each sector of correspondence, so just can know clearly that what telephone traffic resource each BTS and each sector contributed on calling out, aspect switching, contribute how many resources.From the angle of system resource, it is few more good more to wish to switch the ratio that takies telephone traffic, so just can be used for more resources more user's calling incision, and operator just can obtain more economic benefit under the Limited resources environment.But, when switching proportion more hour, the negative effect that brings is exactly that communication process possibility that unusual call drop occurs increases.And after obtaining detailed data by method of the present invention, can the reasonable optimizing wireless network cover, obtaining multiple access user more and guaranteeing to insert between user's the speech quality to do a balance accurately.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 is the schematic diagram of the communication process of cellular communication system;

Fig. 2 is the flow chart according to network optimized approach of the present invention;

Fig. 3 is the schematic diagram of single CE of CU and WalshCode resource;

Fig. 4 is the schematic diagram of two CE of CU and WalshCode resource;

Fig. 5 is the single CE of CU, and has the schematic diagram of two WalshCode on the CE resource;

Fig. 6 is the schematic diagram that mobile station resources takies an example of situation; And

Fig. 7 is a schematic diagram of having used the complex communication process of three kinds of telephone traffic algorithms.

Embodiment

Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.

Fig. 2 shows the flow chart according to network optimized approach of the present invention.As shown in Figure 2, this method may further comprise the steps: S202, add up at least a communication resource respectively and be used to the telephone traffic of calling out and switching; And S204, carry out the network optimization according to the telephone traffic of statistics.

Wherein, the communication resource comprises following at least a: Channel Elements and WalshCode.

Wherein, in step S202, do not carry out in the user's communication process under the situation of soft handover, the telephone traffic that the communication resource is used to call out is T.

Carry out in the user's communication process under the situation of soft handover, the telephone traffic that Channel Elements is used to call out is T/n, and the telephone traffic that Channel Elements is used to switch is

Wherein, T is the duration of call, and n is the quantity of the Channel Elements of CU.

Under situation about having on the Channel Elements corresponding to the Traffic Channel of im WalshCode, the telephone traffic that WalshCode is used to call out is

The telephone traffic that WalshCode is used to switch is / im.The telephone traffic that WalshCode is used for More Soft Handoff is

$T-(\frac{T}{n}/\mathrm{im})-((T-\frac{T}{n})/\mathrm{im}).$

Network optimized approach according to the present invention is used for the cdma wireless connecting system.

In a simple CDMA call mode, a user will set up normal communication with base station system, just must set up a Traffic Channel.And the foundation of a Traffic Channel needs following two kinds of resources: Channel Elements (Channel Element is called for short CE) and WalshCode.And these two resources are Radio Resources the most valuable in the CDMA communication system.The single user who is under the switching state need occupy a plurality of CE and a plurality of WalshCode.

Below several typical traffic pattern of being utilized in the network optimized approach according to the present invention is carried out Algorithm Analysis:

One, in the whole communication process, there is not the situation of soft handover.As shown in Figure 3, in this case, Radio Resource CE that the user occupies and WalshCode have only one.If in whole communication process, the time spent is T, also is time T for taking of CE and WalshCode then.That is to say that the duration that takies CE and WalshCode in the communication process is T.

Two, a kind of situation that has soft handover in the communication process.

For example, as shown in Figure 4, in the time T of user in certain communication process, take 2 CE, had two WalshCode to work out on each CE, promptly taken 2 WalshCode respectively.This situation is exactly traditional soft switching process.In time period T, conversation only needs a Traffic Channel that the WalshCode establishment forms on a CE resource and this CE, and the CE that takies in addition and a WalshCode resource are used for handoff procedure.

In this traffic pattern that the present invention proposes, have only a CE resource and a WalshCode resource occupation amount to be used for conversation among 2 CE, and another one CE and a WalshCode resource are used for switching.Because these two CE and WalshCode play the part of equal role in conversation and handoff procedure, so proposed average principle in this case, take computational methods thereby obtain following telephone traffic:

The telephone traffic of each CE:T/2 is used for conversation, and the telephone traffic of T/2 is used for switching.

The telephone traffic of each WalshCode:T/2 is used for conversation, and the telephone traffic of T/2 is used for switching.

Three, the another kind of situation that has soft handover in the communication process.

For example, as shown in Figure 5, the user is T the time in certain communication process, has taken 1 CE resource, and exists two WalshCode to work out on this CE resource, thereby forms two Traffic Channels.

This situation also is the common More Soft Handoff of cdma system.In time period T, the Traffic Channel that conversation only needs the WalshCode resource on a CE and this CE to form, the Traffic Channel that another one WalshCode forms then is used for the More Soft Handoff process.Equally, because two WalshCode role in whole communication process is identical, thus still use average principle in this case, thus the computational methods that following traffic takies situation obtained.

The telephone traffic of single CE:T has been used for conversation (have only a CE, it does not participate in switching).

The telephone traffic of each WalshCode:T/2 has been used for conversation, and the telephone traffic of T/2 has been used for switching.

Each mobile station resources takies the resource operating position that all writes down when changing before changing.For example, as shown in Figure 6, in time period T, always total CE1, CE2 ... ..., CEn is n CE resource altogether.At each WC1m, WC2m ... ..., TCH is set up in the WalshCode path of WCnm correspondence.

In example shown in Figure 6 and since be actually used in conversation have only a CE and a TCH, remaining resource occupation all belongs to the category of switching, so the telephone traffic of CE customer call is T, according to average principle, each CE contributes to the telephone traffic of calling out and is:

Each CE call traffic=T/n.That is:

${\mathrm{Call}}_{\mathrm{CE}1}={\mathrm{Call}}_{\mathrm{<figure-callout\; id="2"\; label="CE"\; filenames="A20071000073300161.png"\; state="\{\{state\}\}">CE</figure-callout>}2}=\&CenterDot;\&CenterDot;\&CenterDot;={\mathrm{Call}}_{\mathrm{CEi}}=\&CenterDot;\&CenterDot;\&CenterDot;{\mathrm{Call}}_{\mathrm{CEn}}$

$=\frac{T}{n}$

${\mathrm{SHO}}_{\mathrm{CE}1}={\mathrm{SHO}}_{\mathrm{<figure-callout\; id="2"\; label="CE"\; filenames="A20071000073300161.png"\; state="\{\{state\}\}">CE</figure-callout>}2}=\&CenterDot;\&CenterDot;\&CenterDot;={\mathrm{SHO}}_{\mathrm{CEi}}=\&CenterDot;\&CenterDot;\&CenterDot;{\mathrm{SHO}}_{\mathrm{CEn}}$

$=T-\frac{T}{n}$

So it is T-T/n that each CE contributes to the telephone traffic of switching.

All is relevant with the resource of WalshCode of demodulation paths correspondence on this CE for the call traffic of each CE with switching telephone traffic.For the calling of the WalshCode on each CE, call traffic is that this CE goes up the average of call traffic.That is:

${\mathrm{Call}}_{\mathrm{WCi}1}={\mathrm{Call}}_{\mathrm{WCi}2}=\&CenterDot;\&CenterDot;\&CenterDot;={\mathrm{Call}}_{\mathrm{WCij}}=\&CenterDot;\&CenterDot;\&CenterDot;{\mathrm{Call}}_{\mathrm{WCim}}$

$=\frac{T}{n}/\mathrm{im}$

, the TCH of im WalshCode demodulation is arranged herein on the CEi, call traffic is that the im of CEi call traffic divides equally.That is:

${\mathrm{SHO}}_{\mathrm{WCi}1}={\mathrm{SHO}}_{\mathrm{WCi}2}=\&CenterDot;\&CenterDot;\&CenterDot;={\mathrm{SHO}}_{\mathrm{WCij}}=\&CenterDot;\&CenterDot;\&CenterDot;{\mathrm{SHO}}_{\mathrm{WCim}}$

$=(T-\frac{T}{n})/\mathrm{im}$

, the TCH of im WalshCode demodulation is arranged herein on the CEi, the soft handover telephone traffic is that the im of CEi soft handover telephone traffic divides equally.That is:

${\mathrm{SSHO}}_{\mathrm{WCi}1}={\mathrm{<figure-callout\; id="2"\; label="SSHO\; WCi"\; filenames="A20071000073300161.png"\; state="\{\{state\}\}">SSHO</figure-callout>}}_{\mathrm{WCi}}=\&CenterDot;\&CenterDot;\&CenterDot;={\mathrm{SSHO}}_{\mathrm{WCEij}}=\&CenterDot;\&CenterDot;\&CenterDot;{\mathrm{SSHO}}_{\mathrm{WCim}}$

$=T-(\frac{T}{n}/\mathrm{im})-((T-\frac{T}{n})/\mathrm{im})$

Herein, for the More Soft Handoff of each WalshCode, be exactly total call traffic duration and call duration, soft handover duration poor.

Below, describe with reference to 7 pairs of communication processs of having used above-mentioned three kinds of algorithms of figure.Fig. 7 shows in the complete communication process user for the situation that takies of the resource of CE and WalshCode.

In the communication process shown in Fig. 7, in above-mentioned communication process, 5 different processes have been experienced.These 5 processes are respectively:

T1: in the zero hour of T1, the call setup success, (CE1 WC1) participates in to have only TCH1 in the T1 process.

T2: in the zero hour of T2, base station and travelling carriage carry out soft handover one time, in the T2 process, have TCH1 (CE1, WC1) and TCH2 (CE2 WC2) participates in.

T3: in the zero hour of T3, base station and travelling carriage carry out a More Soft Handoff, in the T3 process, have TCH1 (CE1, WC1), TCH2 (CE2, WC2) and TCH3 (CE2, WC3) fellowship.

T4: in the zero hour of T4, base station and travelling carriage carry out a More Soft Handoff, in the T4 process, TCH1 (CE1, WC1) and TCH3 (CE2, WC3) fellowship.

T5: in the zero hour of T5, base station and travelling carriage carry out soft handover one time, simultaneously in the finish time of T5, have carried out the release of calling out, and in the T5 process, (CE2 WC3) participates in to have only TCH3.

According to top algorithm model, obtain in each time period the situation that takies of each CE and WC:

From top algorithm and embodiment, can see, CE call traffic and soft handover telephone traffic after gathering equate that with call traffic and the soft handover telephone traffic sum of WalshCode unique additional part is the telephone traffic about the More Soft Handoff of WalshCode.

Simultaneously because WalshCode is specific to below the cell carrier frequencies of each BTS, so the telephone traffic of WalshCode corresponds to the telephone traffic of each cell carrier frequencies.Analyze the telephone traffic of each cell carrier frequencies, just cell carrier frequencies participates in the telephone traffic proportion calling out and switch as can be seen, thereby carries out the rational network optimization, this sub-district is participated in the telephone traffic of calling out and the telephone traffic of switching reaches a rational poised state.

By the present invention, the telephone traffic of CE and WalshCode can be calculated each BTS and each sector of correspondence, so just can know clearly that what telephone traffic resource each BTS and each sector contributed on calling out, aspect switching, contribute how many resources.From the angle of system resource, it is few more good more to wish to switch the ratio that takies telephone traffic, so just can be used for more resources more user's calling incision, and operator just can obtain more economic benefit under the Limited resources environment.But, when switching proportion more hour, the negative effect that brings is exactly that communication process possibility that unusual call drop occurs increases.And after obtaining detailed data by method of the present invention, can reasonably optimize wireless network to cover, obtaining multiple access user more and guaranteeing to insert between user's the speech quality to do a balance accurately.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. a network optimized approach is characterized in that, said method comprising the steps of:

S202 adds up at least a communication resource respectively and is used to the telephone traffic of calling out and switching; And

S204 carries out the network optimization according to the telephone traffic of statistics.

2. network optimized approach according to claim 1 is characterized in that, the described communication resource comprises following at least a: Channel Elements and WalshCode.

3. network optimized approach according to claim 1 and 2 is characterized in that, in described step S202, does not carry out in the user's communication process under the situation of soft handover, and the telephone traffic that the described communication resource is used to call out is T.

4. network optimized approach according to claim 1 and 2 is characterized in that, carries out in the user's communication process under the situation of soft handover, and the telephone traffic that described Channel Elements is used to call out is T/n, and the telephone traffic that described Channel Elements is used to switch is

, wherein, T is the duration of call, n is the quantity of the described Channel Elements of CU.

5. network optimized approach according to claim 4 is characterized in that, under situation about having on the described Channel Elements corresponding to the Traffic Channel of im WalshCode, the telephone traffic that described WalshCode is used to call out is

, the telephone traffic that described WalshCode is used to switch is

6. network optimized approach according to claim 5 is characterized in that, the telephone traffic that described WalshCode is used for More Soft Handoff is $T-(\frac{T}{n}/\mathrm{im})-((T-\frac{T}{n})/\mathrm{im}).$

7. network optimized approach according to claim 4 is characterized in that described method is used for the cdma wireless connecting system.

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