CN102547777B - Standalone dedicated control channel (SDCCH) configuration method - Google Patents
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Abstract
The invention discloses a standalone dedicated control channel (SDCCH) configuration method, and belongs to the field of channel configuration in mobile communication. The method comprises the following steps of: calculating traffic of SDCCHs and traffic of traffic channels (TCHs) according to acquired related traffic statistical data of a link access control/base station control (LAC/BSC) level in a global system for mobile communication (GSM) network; calculating the available quantity of the TCHs in a cell according to the carrier frequency configuration of the cell; and determining an SDCCH configuration scheme of the cell according to the available quantity of the TCHs in the cell and a ratio of the traffic of the TCHs to the traffic of the SDCCHs. By the method, only the related traffic statistical data of the LAC/BSC level is required to be acquired, the channel configuration of the cell in a region can be reasonably evaluated without the influence of regions and other factors, and a channel ratio can be dynamically regulated, so the traffic can be balanced, and the aim of optimum resource configuration can be fulfilled.
Description
Technical field
The present invention relates to the channel configuration field in mobile communication, be specifically related to a kind of in real time effective SDCCH channel arrangement method.
Background technology
In the air interface of mobile communication GSM network, need to transmit a large amount of information.According to the variety classes of channel bearing business, define different logic channels.Logic channel is mapped on physical channel.Gsm system logic channel is divided into two large classes: dedicated channel and common signal channel, dedicated channel mainly refers to the Traffic Channel for transmitting user speech or data, also comprises some Dedicated Control Channel for controlling.And in all logic channels, SDCCH channel (Separate Dedicated Control Channel) has been played the part of a considerable role, and its Main Function is the transmission of bearing system information before TCH channel assigning, as user's access, user's registration, the signalings such as authentication ciphering and call proceeding.Therefore,, in Yi Ge community, the how certain SDCCH channel of reasonable disposition, determines and the optimal proportion of TCH and SDCCH channel can effectively utilize channel resource, ensures carrying out smoothly of call, and realizes equalizing traffic volume.
In current channel configuration, also very not similar technology, is mainly to carry out configurating channel by actual traffic measurement and experience.Its main implementation method is by backstage traffic measurement index: TCH telephone traffic, and SDCCH times of congestion, SDCCH telephone traffic, SDCCH congestion ratio etc. judges whether channel needs to do channel adjustment.Because by statistical indicator being is finding that adjusting has appearred congested in the situation that in SDCCH channel, and whether the channel architecture of adjusting rationally cannot be assessed, or itself there is redundancy in SDCCH channel configuration, but congested owing to not occurring, do not do channel architecture adjustment, thus, easily cause the unreasonable of channel configuration, occur the wasting of resources.
Summary of the invention
For the defect existing in prior art, the object of the present invention is to provide a kind of SDCCH channel arrangement method, effectively assess the reasonable disposition of channel, and configure optimum channel ratio according to traffic model, reach the object of resource distribution optimum.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of SDCCH channel arrangement method, comprises the following steps:
(1) obtain the traffic measurement result in region to be configured, calculate SDCCH telephone traffic and the TCH telephone traffic in this region, and obtain TCH telephone traffic and the SDCCH telephone traffic ratio R in region;
(2) according to the carrier configuration that is positioned at Nei community, described region, the traffic channel of calculation plot can be used number C;
(3) can determine with the TCH telephone traffic in number C and region and SDCCH telephone traffic ratio R the configuration of the SDCCH channel of community according to the traffic channel of community.
Further, a kind of SDCCH channel arrangement method as above, in step (1), when SDCCH channel redundancy is not set spends, takies duration calculation SDCCH telephone traffic and TCH telephone traffic according to the event type of SDCCH channel occupancy and event; Described event type comprise position renewal, short message, calling, IMSI adhere to separate, facsimile service and supplementary service.
Further, a kind of SDCCH channel arrangement method as above, the formula that takies duration calculation SDCCH telephone traffic according to the event type of channel occupancy and event is:
SDCCH_TRAFFIC＝((SDCCH_CALL)×T
1+(SDCCH_SMS)×T
2+(SUCC_SEIZ_SUPPLEM_SERV)×T
3+(SDCCH_LOC_UPD)×T
4+(IMSI_DETACH_SDCCH)×T
5))/3600；
Wherein, SDCCH_TRAFFIC represents SDCCH telephone traffic, SDCCH_CALL represents that calling takies number of times, SDCCH_SMS represents that short message takies number of times, SUCC_SEIZ_SUPPLEM_SERV represents that supplementary service takies number of times, SDCCH_LOC_UPD represents that position is upgraded and takies number of times, and IMSI_DETACH_SDCCH represents that IMSI adheres to separating and takies number of times, T
1, T
2, T
3, T
4, T
5represent respectively the duration that takies of all types of events.
Further, a kind of SDCCH channel arrangement method as above, the formula that takies duration calculation TCH telephone traffic according to the event type of channel occupancy and event is:
TCH_TRAFFIC＝ave_busy_tch/res_av_denom14；
Wherein, TCH_TRAFFIC represents TCH telephone traffic, and ave_busy_tch represents TCH channel occupancy duration, and res_av_denom14 represents the scan period of TCH telephone traffic.
Further, a kind of SDCCH channel arrangement method as above, in step (3), determine that the concrete mode of configuration of the SDCCH channel of community is as follows:
1. can use number C according to the traffic channel of community, determine TCH channel number X and the SDCCH channel number Y of community, wherein, X+Y=C;
2. inquire about ERLANG B, obtain the TCH telephone traffic T that X TCH channel supported, and Y the SDCCH telephone traffic D that SDCCH channel is supported;
3. check whether T/D is less than R, if the channel configuration of step in is 2. reasonable, return to if not step and 1. redefine TCH channel number X and the SDCCH channel number Y of community.
Further, a kind of SDCCH channel arrangement method as above, step 2. in, check ERLANG B according to the TCH percent of call lost and the SDCCH percent of call lost, obtain the TCH telephone traffic T that X TCH channel supported, and Y the SDCCH telephone traffic D that SDCCH channel is supported.
Further, a kind of SDCCH channel arrangement method as above, in step (2), the traffic channel that calculates the community of 1 BCCH channel can be with the formula of number C:
C=cell configuration carrier frequency number × n-1;
Wherein, n represents in SDCCH channelling mode the number of the SDCCH subchannel that a physical channel is divided into.
Further, a kind of SDCCH channel arrangement method as above, in the time SDCCH channel redundancy is set spends, in step (1), the formula that calculates SDCCH telephone traffic is:
SD_TF＝SDCCH_SEIZ_ATT×(1+A)×7/3600；
Wherein, SD_TF represents SDCCH telephone traffic, and SDCCH_SEIZ_ATT represents the request times of SDCCH channel in network, and A represents channel redundancy degree.
Further again, a kind of SDCCH channel arrangement method as above, the span 0～50% of described A.
Further, a kind of SDCCH channel arrangement method as above, in step (3), determine that the concrete mode of configuration of the SDCCH channel of community is as follows:
1) can use number C according to the traffic channel of community, determine the TCH channel number X of community
1with SDCCH channel number Y
1, wherein, X
1+ Y
1=C;
2) inquiry ERLANG B, obtains X
1the TCH telephone traffic T that individual TCH channel is supported, and Y
1the SDCCH telephone traffic D that individual SDCCH channel is supported;
3) check whether T/D is less than R, if enter step 4), return to if not step 1) redefine the TCH channel number X of community
1with SDCCH channel number Y
1;
4) check the number N of the SDCCH channel that community takies at most in setting-up time section;
5) determine the number Z of the SDCCH channel of community, Z=Max (Y, Y
1, N), wherein, Y is the number of SDCCH channel definite when SDCCH channel redundancy is not set spends.
Beneficial effect of the present invention is: the present invention takies relevant statistics and the community hardware configuration information of SDCCH channel according to GSM mobile communication subscriber, the reasonable disposition of Efficient Evaluation channel, and can mate optimum channel ratio according to actual traffic model.The method is not just affected by region and other factors can carry out reasonable assessment to the configuration of region cell channel, dynamically adjusts channel ratio, makes telephone traffic reach balanced, realizes the optimization of resource distribution.
Brief description of the drawings
Fig. 1 is the flow chart of a kind of SDCCH channel arrangement method in embodiment;
Fig. 2 is the particular flow sheet of SDCCH channel configuration when channel redundancy not being set in embodiment and spending;
Fig. 3 is the particular flow sheet of SDCCH channel configuration when channel redundancy being set in embodiment and spending.
Embodiment
Below in conjunction with Figure of description and embodiment, the present invention is described in further detail.
Fig. 1 shows the flow chart of a kind of SDCCH channel arrangement method of the present invention, and the method mainly comprises the following steps:
Step 1: according to SDCCH telephone traffic, TCH telephone traffic and the TCH telephone traffic of the traffic measurement result zoning in region to be configured and the ratio R of SDCCH telephone traffic;
The present invention takies relevant statistics and the community hardware configuration information of SDCCH channel, the reasonable disposition of Efficient Evaluation channel according to GSM mobile communication subscriber.First obtain the relevant statistics of LAC/BSC level, according to SDCCH telephone traffic, TCH telephone traffic and the TCH telephone traffic of relevant traffic measurement result zoning and the ratio R of SDCCH telephone traffic.
In reality call, SDCCH channel has been born following three class main tasks:
RRM (RR), mobile management (MM), subscriber service class (Subscriber Service); The duration that variety of event takies SDCCH channel can come out by counter counter, and in conjunction with TCH telephone traffic, carrier configuration, the structure of the information reasonable assessment SDCCH channel configurations such as number of users.The present invention takies duration calculation SDCCH telephone traffic and TCH telephone traffic according to the event type of SDCCH channel occupancy and event just.In the taking of SDCCH channel, can summarize 7 large class events, each event all can take certain time length, by gathering the holding time of all events, SDCCH telephone traffic can be calculated, then in conjunction with TCH telephone traffic and number of users information, this area traffic accounting model can be obtained.
First, mark off the event that takies SDCCH channel, (LU is upgraded in position, Location Updateding) (being labeled as A1), short message (Short Messaging Service) is labeled as A2), caller (being labeled as A3), called (being labeled as A4), IMSI adheres to and separates (being labeled as A5), facsimile service (A6), supplementary service (A10).Each event takies duration empirical value as following table:
| Event | Take duration (second) |
| Position is upgraded | 3.5 |
| Shutdown/start | 2.9/3.5 |
| Caller | 2.7 |
| Called | 2.9 |
| Short message | 6.2 |
| Fax (caller/called) | 2.7/2.9 |
| Supplementary service | 0.9 |
In the present embodiment, calling and called are referred to as to calling, its time takies duration gets both average 2.8 seconds.User's start is divided into three kinds of situations:
1. user's access network for the first time, data storage card (SIM card) can not find original position district identification code (LAI), starts a position and upgrades.
It is inconsistent that 2.IMIS adheres to RuoLAIYu Yuan community, enable position renewal process, and holding time is 3.5 seconds.
3. user starts shooting for the first time, and LAIYu Yuan community is consistent, only carries out IMSI attaching process.
In the time calculating SDCCH telephone traffic, the formula of routine is:
SDCCH TRAFFIC＝AVE_BUSY_SDCCH/RES_AV_DENOM15
While adopting this formula to calculate, due to SDCCH to take duration very short, and the scan period of SDCCH telephone traffic is 20S (res av_denom15=180), so the value of the SDCCH telephone traffic that this formula calculates is very inaccurate, particularly when relatively Di community of SDCCH telephone traffic.Therefore present embodiment adopts other a kind of computational methods in the time of the telephone traffic of calculating in traffic model, and computing formula is as follows:
SDCCH_TRAFFIC＝((SDCCH_CALL)×T
1+(SDCCH_SMS)×T
2+(SUCC_SEIZ_SUPPLEM_SERV)×T
3+(SDCCH_LOC_UPD)×T
4+(IMSI_DETACH_SDCCH)×T
5)/3600； (1)
Wherein, SDCCH_TRAFFIC represents SDCCH telephone traffic, SDCCH_CALL represents that calling takies number of times, SDCCH_SMS represents that short message takies number of times, SUCC_SEIZ_SUPPLEM_SERV represents that supplementary service takies number of times, SDCCH_LOC_UPD represents that position is upgraded and takies number of times, and IMSI_DETACH_SDCCH represents that IMSI adheres to separating and takies number of times, T
1, T
1, T
3, T
4, T
5represent respectively all types of durations that takies.
What wherein calling caused takies number of times SDCCH_CALL, and computational methods are as follows:
SDCCH_CALL＝SUCC_SEIZ_ORIG+SUCC_SEIZ_TERM+SDCCH_CALL_RE_EST+SDCCH_EMERG_CALL；
SUCC_SEIZ_ORIG, SUCC_SEIZ_TERM, SDCCH_CALL_RE_EST, SDCCH_EMERG_CALL all represents counter (counter).Wherein, SUCC_SEIZE_ORIG represents that the SDCCH channel request of being initiated by caller MOC (MOBILE ORIGINATING CALL) successfully takies number of times, when BSC (Base Station Controller base station controller) receives BTS (Base Transceiver Station base transceiver station.) while comprising (CM service request) in foundation instruction (ESTABLISH INDICATION) message of sending, this counter of SUCC_SEIZE_ORIG adds 1.。
SUCC_SEIZE_TERM represents that the SDCCH channel request of being initiated by called MTC (MOBILE TERMINATED CALL) takies number of success: when BSC receives that while comprising (paging response) in foundation instruction (ESTABLISHINDICATION) message that BTS sends, counter adds 1.
SDCCH_CALL_RE_EST represents because the SDCCH channel request that call re-establishment (RE_ESTABLISHMENT) is initiated takies number of success, when BSC receives that while comprising (call re_establishment) in foundation instruction (ESTABLISH INDICATION) message that BTS sends, counter adds 1.
SDCCH_EMERG_CALL represents because the SDCCH channel request that urgent call (EMERGENCY CALL) is initiated takies successful number of times: when BSC receives that while comprising (emergeney call) in foundation instruction (ESTABLISH INDICATION) message that BTS sends, counter adds 1.
Because SDCCH_CALL is the accumulation result of above-mentioned counter, so the increase of above-mentioned counter also can bring and call out the increase that takies number of times SDCCH_CALL causing.
What note caused takies number of times SDCCH_SMS, and computational methods are as follows:
SDCCH_SMS＝SUCC_SDCCH_SMS_EST+UNSUCC_SDCCH_SMS_EST；
SUCC_SDCCH_SMS_EST, UNSUCC_SDCCH_SMS_EST is counter (coutner).Wherein, SUCC_SDCCH_SMS_EST is illustrated in the number of times that on SDCCH channel, short message is successfully established; UNSUCC_SDCCH_SMS_EST is illustrated in short message on SDCCH channel and sets up failed number of times.
The formula that calculates TCH telephone traffic is:
TCH_TRAFFIC＝ave_busy_tch/res_av_denom14； (2)
Wherein, TCH_TRAFFIC represents TCH telephone traffic, and ave_busy_tch represents TCH channel occupancy duration, and res_av_denom14 represents the scan period of TCH telephone traffic.
The present invention can also count LAC region number of users according to above-mentioned LAC: (Nokia's equipment can be inquired about with SQL script)
LAC_SUB＝SUBSC_IN_LA (3)
Can calculate average every user TCH and SDCCH telephone traffic and full LAC region TCH and SDCCH telephone traffic accounting situation by above-mentioned (1) (2) (3) formula:
Average every user SDCCH and TCH telephone traffic:
TCH_TRFFIC_AVE＝TCH TRAFFIC/LAC_SUB (4)
SDCCH_TRAFFIC_SUB＝SDCCH_TRAFFIC/LAC_SUB (5)
The TCH telephone traffic in LAC region and SDCCH telephone traffic ratio R:
R＝TCH_TRAFFIC/SDCCH_TRAFFIC (6)
Calculate the traffic model in LAC region by above-mentioned formula (1)～(6).
Step 2: according to the carrier configuration of community, the traffic channel of calculation plot can be used number C;
According to the traffic model in above-mentioned LAC region, calculate the needed cell telephone traffic channel in different carrier configurations community in described region to be configured and can use number, the traffic channel that calculates the community of 1 BCCH channel can be with the formula of number C:
C=cell configuration carrier frequency number × n-1; (7)
Wherein, n represents in SDCCH channelling mode the number of the SDCCH subchannel that a physical channel is divided into.N can get 4 and 8 two kind of value, considers paging capacity limited case, and the configuration of general recommendations cell carrier frequencies adopts the pattern of SDCCH/8, the situation that namely n value is 8.Under this configuration mode, the traffic channel of community can be used number C=cell configuration carrier frequency number × 8-1.
Step 3: the SDCCH channel configuration that can determine by number C and ratio R community according to the traffic channel of community.
Can determine with number C the channel configuration of community according to the traffic channel calculating in the TCH telephone traffic of calculating in step 1 and SDCCH telephone traffic ratio R and step 2, the method flow diagram of configuration as shown in Figure 2:
A. first, can use number C according to the traffic channel of community, determine TCH channel number X and the SDCCH channel number Y of community, wherein, X+Y=C;
B. inquire about ERLANG B, obtain the TCH telephone traffic T that X TCH channel supported, and Y the SDCCH telephone traffic D that SDCCH channel is supported;
C. check whether T/D is less than R, if the channel configuration in step b is reasonable, return to if not step a and redefine TCH channel number X and the SDCCH channel number Y of community.
Wherein, in step b, check ERLANG B according to the TCH percent of call lost and the SDCCH percent of call lost, obtain the TCH telephone traffic T that X TCH channel supported, and Y the SDCCH telephone traffic D that SDCCH channel is supported.The TCH percent of call lost and the SDCCH percent of call lost generally all adopt empirical value, and the TCH percent of call lost is that 2%, the SDCCH percent of call lost is 0.5%, can certainly adopt as required other value.
The SDCCH channel configuration number Y calculating by said method is theoretic reasonable value, does not consider and in real network, has the SDCCH congested situation that happens suddenly, and channel redundancy degree is not set.In real network, for ensureing that in the time initiating a large amount of SDCCH request channel is unlikely to occur congested, needs to ensure certain channel redundancy degree A.In the time that channel redundancy degree A is set, calculate the telephone traffic of SDCCH according to existing network SDCCH request times SDCCH_SEIZ_ATT (being arranged in Table table P_NBSC_TRAFFIC), suppose be all allocated successfully at every turn and average occupied duration be 7S (according to above introduce, the average occupied duration of each event of SDCCH is all less than 7S, so just ensure certain redundancy), the formula that calculates in this case the SDCCH telephone traffic of each community in step 1 is:
SD_TF＝SDCCH_SEIZ_ATT×(1+A)×7/3600；
Wherein, SD_TF represents SDCCH telephone traffic, and SDCCH_SEIZ_ATT represents the request times of SDCCH channel in network, and A represents channel redundancy degree.A is the redundancy arranging flexibly, span 0～50%.
At this moment,, in step 3, determine the flow chart of cell channel configuration as shown in Figure 3:
1) first, can use number C according to the traffic channel of community, determine the TCH channel number X of community
1with SDCCH channel number Y
1, wherein, X
1+ Y
1=C;
2) inquiry ERLANG B, obtains X
1the TCH telephone traffic T that individual TCH channel is supported, and Y
1the SDCCH telephone traffic D that individual SDCCH channel is supported;
3) check whether T/D is less than R, if enter step 4), return to if not step 1) redefine the TCH channel number X of community
1with SDCCH channel number Y
1;
4) check the number N of the SDCCH channel that community takies at most in setting-up time section; N value can be found out according to the PEAK_BUSY_SDCCH of community;
5) determine the number Z of the SDCCH channel of community, Z=Max (Y, Y
1, N), wherein, Y is the number of SDCCH channel definite when SDCCH channel redundancy is not set spends.
Y before getting, Y
1with the maximum Z=Max (Y, M, N) of N be the required SDCCH number in community.In the time gathering traffic measurement data, advise the data (abundant number of samples ensures) of continuous 7 days 7:00-23:00, SDCCH_SEIZ_ATT and PEAK_BUSY_SDCCH get respectively mean value separately, get SDCCH_SEIZ_ATT continuous 7 days statistics in peak hour every day section (as 9:00-12:00 morning, late 18:00-21:00, this period is because differently city's traffic model is different) mean value, and round up.Get PEAK_BUSY_SDCCH maximum of every day in continuous 7 days statistics, then ask these peaked arithmetic means, and round up.Calculate the quantity of SDCCH that can optimization according to above-mentioned algorithm.
The method of determining SDCCH configuration by channel redundancy degree is set, is specially adapted to the main line of communication, is positioned at the community that LAC border and traffic are intensive, can ensure to be like this unlikely to occur in the time initiating a large amount of SDCCH request congested.
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment
Taking certain city as example:
On April 6 to 12, this city busy mean place update times is 431935 times, and call setup number of times is 359016 times, and it is 88360 times that note is set up number of times, and shutdown is 6953 times, and the number of times that other reasons takies is 52836 times.The actual telephone traffic of calculating like this SDCCH is:
SDCCH_TRAFFIC=(position update times × 3.5+ call setup number of times × 2.8+ note number of times × 6.2+ shut down number of times × 2.9+ other reasons × 0.9)/3600
＝(431935×3.5+359016×2.8+88360×6.2+6953×2.9+52836×0.9)/3600
=870.15 Ireland
The average telephone traffic of TCH is:
TCH_TRAFFIC=6901 Ireland
Number of users is: LAC_SUB=290373.
The traffic model that can calculate thus this city is:
The telephone traffic of every user TCH is: T_TRAFFIC_SUB=23.77mERL.
Every user's SDCCH telephone traffic is: SD_TRAFFIC_SUB=3.00mERL.
The telephone traffic ratio of TCH and SDCCH is: R=T_TRAFFIC/SD_TRAFFIC=7.93.
Accordingly, can make the required SDCCH number of channel of different carrier frequency.
Computational process is as follows:
Suppose this community, city 6 years configuration, suppose that the TCH number of channel is X, the SDCCH/8 number of channel is Y, and useful traffic channel can be with ading up to:
X+Y=6 × 8-1=47 bar
Can determine with sum afterwards TCH channel number X and the SDCCH channel number Y of community according to useful traffic channel, wherein, X+Y=C, specific as follows:
If Y=1, X=46, telephone traffic separately corresponding to inquiry ERLANG B, the telephone traffic of the SDCCH of support is (call loss is 0.5%): 2.72 Ireland.The telephone traffic of the TCH supporting is (call loss is 2%): 35.8 Ireland.
T/D＝35.8/2.72＝13.16＞R＝7.93。Do not meet the T/D < R in step c, therefore this unreasonable allocation.Now, then redefine TCH channel number X and the SDCCH channel number Y of community:
If Y=2, X=45, telephone traffic separately corresponding to inquiry ERLANG B, the telephone traffic of the SDCCH of support is (call loss is 0.5%): 8.06 Ireland.The telephone traffic of the TCH supporting is (call loss is 2%): 34.9 Ireland.
T/D＝34.9/8.06＝4.33＜R＝7.93。Satisfy condition, therefore this configuration is reasonable.
Or
If Y=3, X=44, telephone traffic separately corresponding to inquiry ERLANG B, the telephone traffic of the SDCCH of support is (call loss is 0.5%): 14.13 Ireland.The telephone traffic of the TCH supporting is (call loss is 2%): 34 Ireland.
T/D＝34/14.13＝2.4＜R＝7.93。Meet equation (9), therefore this configuration is reasonable.
Can calculate X in channel configuration process (the TCH number of channel) by the method, the reasonable value in Y (the SDCCH number of channel) Allocation Theory
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technology thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (5)
1. a SDCCH channel arrangement method, comprises the following steps:
(1) obtain the traffic measurement result in region to be configured, calculate SDCCH telephone traffic and the TCH telephone traffic in this region, and obtain TCH telephone traffic and the SDCCH telephone traffic ratio R in region;
When SDCCH channel redundancy is not set spends, the formula that takies duration calculation SDCCH telephone traffic according to the event type of channel occupancy and event is:
SDCCH_TRAFFIC=((SDCCH_CALL)×T
1+(SDCCH_SMS)×T
2+(SUCC_SEIZ_SUPPLEM_SERV)×T
3+(SDCCH_LOC_UPD)×T
4+(IMSI_DETACH_SDCCH)×T
5))/3600；
Wherein, SDCCH_TRAFFIC represents SDCCH telephone traffic, SDCCH_CALL represents that calling takies number of times, SDCCH_SMS represents that short message takies number of times, SUCC_SEIZ_SUPPLEM_SERV represents that supplementary service takies number of times, SDCCH_LOC_UPD represents that position is upgraded and takies number of times, and IMSI_DETACH_SDCCH represents that IMSI adheres to separating and takies number of times, T
1, T
2, T
3, T
4, T
5represent respectively the duration that takies of all types of events;
In the time SDCCH channel redundancy is set spends, the formula that calculates SDCCH telephone traffic is:
SD_TF=SDCCH_SEIZ_ATT×（1+A）×7/3600；
Wherein, SD_TF represents SDCCH telephone traffic, and SDCCH_SEIZ_ATT represents the request times of SDCCH channel in network, and A represents channel redundancy degree;
The formula that takies duration calculation TCH telephone traffic according to the event type of channel occupancy and event is:
TCH_TRAFFIC=ave_busy_tch/res_av_denom14；
Wherein, TCH_TRAFFIC represents TCH telephone traffic, and ave_busy_tch represents TCH channel occupancy duration, and res_av_denom14 represents the scan period of TCH telephone traffic;
(2) according to the carrier configuration that is positioned at Nei community, described region, the traffic channel of calculation plot can be used number C;
(3) can determine with the TCH telephone traffic in number C and region and SDCCH telephone traffic ratio R the configuration of the SDCCH channel of community according to the traffic channel of community;
When SDCCH channel redundancy is not set spends, determine that the concrete mode of configuration of the SDCCH channel of community is as follows:
1. can use number C according to the traffic channel of community, determine TCH channel number X and the SDCCH channel number Y of community, wherein, X+Y=C;
2. inquire about ERLANG B, obtain the TCH telephone traffic T that X TCH channel supported, and Y the SDCCH telephone traffic D that SDCCH channel is supported;
3. check whether T/D is less than R, if the channel configuration of step in is 2. reasonable, return to if not step and 1. redefine TCH channel number X and the SDCCH channel number Y of community;
In the time SDCCH channel redundancy is set spends, determine that the concrete mode of configuration of the SDCCH channel of community is as follows:
1) can use number C according to the traffic channel of community, determine the TCH channel number X of community
1with SDCCH channel number Y
1, wherein, X
1+ Y
1=C;
2) inquiry ERLANG B, obtains X
1the TCH telephone traffic T that individual TCH channel is supported, and Y
1the SDCCH telephone traffic D that individual SDCCH channel is supported;
3) check whether T/D is less than R, if enter step 4), return to if not step 1) and redefine the TCH channel number X of community
1with SDCCH channel number Y
1;
4) check the number N of the SDCCH channel that community takies at most in setting-up time section;
5) determine the number Z of the SDCCH channel of community, Z=Max (Y, Y
1, N), wherein, Y is the number of SDCCH channel definite when SDCCH channel redundancy is not set spends.
2. a kind of SDCCH channel arrangement method as claimed in claim 1, is characterized in that: in step (1), described event type comprise position renewal, short message, calling, IMSI adhere to separate, facsimile service and supplementary service.
3. a kind of SDCCH channel arrangement method as claimed in claim 1, it is characterized in that: step 2. in, check ERLANG B according to the TCH percent of call lost and the SDCCH percent of call lost, obtain the TCH telephone traffic T that X TCH channel supported, and Y the SDCCH telephone traffic D that SDCCH channel is supported.
4. a kind of SDCCH channel arrangement method as claimed in claim 1, is characterized in that: in step (2), the traffic channel that calculates the community of 1 BCCH channel can be with the formula of number C:
C=cell configuration carrier frequency number × n-1;
Wherein, n represents in SDCCH channelling mode the number of the SDCCH subchannel that a physical channel is divided into.
5. a kind of SDCCH channel arrangement method as claimed in claim 1, is characterized in that: the span 0～50% of described A.
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| CN103796276B (en) * | 2012-10-31 | 2017-11-03 | 中兴通讯股份有限公司 | Shorten the method and system of calling establishment time delay |
| CN102970693B (en) * | 2012-11-09 | 2015-04-22 | 北京拓明科技有限公司 | Standalone dedicated control channel (SDCCH) automatic configuration adjustment method based on traffic system |
| CN105848160B (en) * | 2015-01-16 | 2019-04-19 | 中国移动通信集团上海有限公司 | A channel configuration method and device |
| CN109565677B (en) * | 2017-02-20 | 2020-12-08 | 华为技术有限公司 | Network capacity adjustment method and network device |
| CN111314963B (en) * | 2018-12-11 | 2022-07-26 | 中国移动通信集团吉林有限公司 | Cell load balancing method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993010600A1 (en) * | 1991-11-21 | 1993-05-27 | Motorola, Inc. | Method of assigning a voice/data channel or a temporary control channel |
| CN1276136A (en) * | 1997-10-28 | 2000-12-06 | 艾利森电话股份有限公司 | Methodsof reconfiguring cell in cellular mobile radio system |
-
2012
- 2012-02-20 CN CN201210040364.3A patent/CN102547777B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993010600A1 (en) * | 1991-11-21 | 1993-05-27 | Motorola, Inc. | Method of assigning a voice/data channel or a temporary control channel |
| CN1276136A (en) * | 1997-10-28 | 2000-12-06 | 艾利森电话股份有限公司 | Methodsof reconfiguring cell in cellular mobile radio system |
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