CN103369596A - Terminal switching method and device - Google Patents
Terminal switching method and device Download PDFInfo
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- CN103369596A CN103369596A CN2012100977915A CN201210097791A CN103369596A CN 103369596 A CN103369596 A CN 103369596A CN 2012100977915 A CN2012100977915 A CN 2012100977915A CN 201210097791 A CN201210097791 A CN 201210097791A CN 103369596 A CN103369596 A CN 103369596A
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Abstract
The invention provides a terminal switching method and a terminal switching device. The method comprises that when the load of a first district exceeds a first preset threshold, whether the load of a second district is lower than a second preset threshold is determined, wherein the second district is related to the first district, and the first and second districts employ different frequency ranges; and when the load of the second district is lower than the second preset threshold, a first terminal in the first district is switched to the second district which is related to the first district. According to the invention, the problems of a common BCCH (Broadcast Control Channel) technology including high failure rate of terminal designation, high failure rate of terminal switching, and telephone traffic imbalance of the two frequency ranges caused by incapability of accurately acquiring level states of the district in correspondence with the 1800MHz frequency range are solved, thereby improving success rates of terminal switching and terminal designation, and effectively balancing telephone traffic of different frequency ranges.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of terminal switching method and device.
Background technology
The rapid growth of mobile subscriber's quantity, more and more higher to the requirement of global mobile communication (Global system for Mobile Communication is referred to as GSM) network capacity, so that the contradiction of network capacity and user's request is more outstanding.In order to solve the limited problem of network capacity, introduce digital cross-connection system (Digital Cross-connect System, referred to as DCS) 1800 networks, use Dual Band network to solve the limited problem of capacity, be the most effective also be safest solution.Two frequency ranges of Dual Band network are in respectively 900MHz and 1800MHz; because these two frequency ranges difference on propagation characteristic is apparent in view; the Dual Band network residential quarter of having caused common station to build is different to the covering power of the same area, usually can be less than the coverage corresponding to the residential quarter of 900MHz frequency range corresponding to the coverage of the residential quarter of 1800MHz frequency range.
In Dual Band network, usually use altogether Broadcast Control Channel (Broadcast Control Channel is referred to as BCCH) technology.BCCH refers in a residential quarter altogether, there are simultaneously two kinds of frequency ranges of 900MHz and 1800MHz, the traffic channel of two frequency ranges (Traffic Channel is referred to as TCH) uses same BCCH channel jointly, and dual band terminal can freely switch between these two frequency ranges.Because the signal propagation losses of 900MHz frequency range is little, therefore, its covering performance is good, and under above-mentioned networking scene, the frequency range of normal operation 900MHz uses the frequency range of 1800MHz as the part of TCH channel as the BCCH channel.GSM900 network/DCS1800 network altogether BCCH channel is based on the concentric circles realization.
But in actual applications, GSM900 network/DCS1800 network altogether BCCH channel has following applied defect: 1) because 900MHz is different with the coverage property of 1800MHz frequency range, and terminal can only be estimated according to the BCCH channel measurement of 900MHz frequency range the signal strength signal intensity of 1800MHz frequency range, can not obtain exactly the signal strength signal intensity of 1800MHz frequency range, therefore, may cause the terminal in the residential quarter to carry out blind switching two frequency ranges, thereby increased appointment mortality and the handover failure rate of terminal, brought impact to network index; 2) owing to can not obtain exactly the load condition of residential quarter corresponding to 1800MHz frequency range, may cause the carrier frequency quantity configuration of 900MHz and 1800MHz frequency range and traffic to share ratio is not inconsistent, thereby cause local resource corresponding to 900MHz frequency range congested, affect minizone performance of handoffs index; 3) concentric circles covers and requires azimuth and the angle of declination of 900MHz antenna and 1800MHz antenna in full accord, and parameter adjustment also will be finely tuned by the station in conjunction with the distribution of the terminal in the overlay area and level situation, so that network optimization difficulty is higher.
Therefore, in above-mentioned Dual Band network, adopt when being total to the BCCH Channel Technology, owing to can't obtain exactly the level situation of residential quarter corresponding to a frequency range in the double frequency, caused occurring terminal two phenomenons that frequency range is carried out blind switching, thereby appointment mortality and the handover failure rate of terminal have been increased, simultaneously, cause the traffic of two frequency ranges unbalanced, so that the problem of resource congestion appears in residential quarter corresponding to another frequency range in the double frequency, thereby reduced the performance of network, reduced the communication quality of network.
Summary of the invention
The invention provides a kind of terminal switching method and device, to solve at least employing in the correlation technique altogether during the BCCH Channel Technology, owing to can't obtain exactly the level situation of residential quarter corresponding to a frequency range in the double frequency, and the terminal that causes assigns mortality and handover failure rate is high and the unbalanced problem of the traffic of two frequency ranges.
According to an aspect of the present invention, a kind of terminal switching method is provided, it comprises: when the load of the first residential quarter has surpassed the first predetermined threshold value, whether the load of judging the second residential quarter that is associated with the first residential quarter is lower than the second predetermined threshold value, wherein, the first residential quarter and the second residential quarter are for adopting two residential quarters of different frequency range; When the load of the second residential quarter is lower than the second predetermined threshold value, the first terminal in the first residential quarter is switched to the second residential quarter that is associated with the first residential quarter.
Preferably, when the load of the first residential quarter has surpassed the first predetermined threshold value, whether the load of judging the second residential quarter be associated with the first residential quarter is lower than the second predetermined threshold value comprises: the load of the first residential quarter is during greater than the TCH congestion threshold value of the first residential quarter, and whether the load of judging the second residential quarter is less than the TCH congestion threshold value of the second residential quarter; If the load of the second residential quarter less than the TCH congestion threshold value of the second residential quarter, is then judged first terminal is switched to the second residential quarter that is associated with the first residential quarter.
Preferably, when the load of the second residential quarter is lower than the second predetermined threshold value, first terminal in the first residential quarter is switched to the second residential quarter that is associated with the first residential quarter to be comprised: when allowing the double frequency traffic to switch, whether the load of judging the first residential quarter is greater than the TCH congestion threshold value of the first residential quarter; If the load of the first residential quarter is higher than the TCH congestion threshold value of the first residential quarter, judge then whether Timing Advance (Timing Advance is referred to as the TA) value of the second residential quarter is lower than default dual-frequency network switching TA threshold value; If the TA value of the second residential quarter is lower than the descending level of default dual-frequency network switching TA threshold value and the second residential quarter greater than default dual-frequency network switch level threshold value, then first terminal is switched to the second residential quarter that is associated with the first residential quarter.
Preferably, when the load in the first residential quarter has surpassed the first predetermined threshold value, whether the load of judging the second residential quarter that is associated with the first residential quarter is lower than before the second predetermined threshold value, above-mentioned terminal switching method also comprises: when the second terminal accesses the second residential quarter, when the load of the second residential quarter has surpassed the TCH portion gate limit value of the second residential quarter, judge whether the load of the first residential quarter that is associated with the second residential quarter is lower than the TCH portion gate limit value of the first residential quarter; The load of the first residential quarter is lower than the TCH portion gate limit value of the second residential quarter and the access level of the first residential quarter is higher than when presetting minimum access level, and the second terminal is accessed the first residential quarter.
Preferably, when the load in the first residential quarter that is associated with the second residential quarter is higher than the TCH portion gate limit value of the first residential quarter, judge whether the load of the second residential quarter is higher than the TCH congestion threshold value of the second residential quarter; If the load of the second residential quarter is higher than the TCH congestion threshold value of the second residential quarter, judge whether the load of the first residential quarter is higher than the TCH congestion threshold value of the first residential quarter; When the load in the first residential quarter is lower than the TCH congestion threshold value of the first residential quarter, when the TA value of the first residential quarter is lower than descending level that default dual-frequency network switches TA threshold value and the first residential quarter greater than default dual-frequency network switch level threshold value, the second terminal is accessed the first residential quarter.
Preferably, frequency range corresponding to the first residential quarter is 900MHz, and frequency range corresponding to the second residential quarter is 1800MHz; Perhaps frequency range corresponding to the second residential quarter is 900MHz, and frequency range corresponding to the first residential quarter is 1800MHz.
According to a further aspect in the invention, a kind of terminal switching device shifter is provided, it comprises: the first judge module, when having surpassed the first predetermined threshold value for the load in the first residential quarter, whether the load of judging the second residential quarter that is associated with the first residential quarter is lower than the second predetermined threshold value, wherein, the first residential quarter and the second residential quarter are for adopting two residential quarters of different frequency range; Handover module when being lower than the second predetermined threshold value for the load in the second residential quarter, switches to the first terminal in the first residential quarter the second residential quarter that is associated with the first residential quarter.
Preferably, the first judge module comprises: the first judging unit, be used at the load of the first residential quarter during greater than the TCH congestion threshold value of the first residential quarter, and whether the load of judging the second residential quarter is less than the TCH congestion threshold value of the second residential quarter; Processing unit is used for, judging first terminal being switched to the second residential quarter that is associated with the first residential quarter during less than the TCH congestion threshold value of the second residential quarter at the load of the second residential quarter.
Preferably, handover module comprises: the second judging unit, be used for when allowing the double frequency traffic to switch, and whether the load of judging the first residential quarter is greater than the TCH congestion threshold value of the first residential quarter; The 3rd judging unit is used for during greater than the TCH congestion threshold value of the first residential quarter, judging that whether the TA value of the second residential quarter is less than default dual-frequency network switching TA threshold value at the load of the first residential quarter; Switch unit, the descending level that is used for switching TA threshold value and the second residential quarter less than default dual-frequency network in the TA of the second residential quarter value switch to first terminal the second residential quarter that is associated with the first residential quarter during greater than the dual-frequency network switch level threshold value preset.
Preferably, above-mentioned terminal switching device shifter also comprises: the second judge module, be used for when the second terminal accesses the second residential quarter, when the load of the second residential quarter has surpassed the TCH portion gate limit value of the second residential quarter, judge whether the load of the first residential quarter that is associated with the second residential quarter is lower than the TCH portion gate limit value of the first residential quarter; The first access module when being used for access level that load in the first residential quarter is lower than the TCH portion gate limit value of the first residential quarter and the first residential quarter and being higher than default minimum access level, accesses the first residential quarter with the second terminal.
Preferably, the 3rd judge module when being higher than the TCH portion gate limit value of the first residential quarter for the load in the first residential quarter that is associated with the second residential quarter, judges whether the load of the second residential quarter is higher than the TCH congestion threshold value of the second residential quarter; The 4th judge module is used for the TCH congestion threshold value that load in the second residential quarter is higher than the second residential quarter, judges whether the load of the first residential quarter is higher than the TCH congestion threshold value of the first residential quarter; The second access module, when being lower than the TCH congestion threshold value of the first residential quarter for the load in the first residential quarter, when the TA value of the first residential quarter is lower than descending level that default dual-frequency network switches TA threshold value and the first residential quarter greater than default dual-frequency network switch level threshold value, the second terminal is accessed the first residential quarter.
In the present invention, after having terminal to access the first residential quarter, when the load of the first residential quarter has surpassed the first predetermined threshold value, whether the load of then judging the second residential quarter that is associated with the first residential quarter is lower than the second predetermined threshold value, wherein, the first residential quarter and the second residential quarter are for adopting two residential quarters of different frequency range, if when judging the load of the second residential quarter and being lower than the second predetermined threshold value, then the first terminal in the first residential quarter is switched to the second residential quarter that is associated with the first residential quarter, realized according to the load condition of the first residential quarter and the second residential quarter the first terminal in the first residential quarter being switched in the second residential quarter, avoided in Dual Band network the problem of between different frequency range, carrying out blind switching owing to the terminal that adopts BCCH Channel Technology altogether to cause, thereby Effective Raise appointment success rate and the handover success rate of terminal, and then improved the performance of network; Simultaneously, the first residential quarter and frequency range corresponding to the second residential quarter difference, load condition according to the first residential quarter and the second residential quarter is switched terminal between the first residential quarter and the second residential quarter, can avoid a certain frequency range the phenomenon of resource congestion to occur, traffic between effectively balanced different frequency range, thus help to improve the communication quality of network.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the terminal switching method of the embodiment of the invention;
Fig. 2 is the schematic diagram according to the community associated covering of the different frequency range of the embodiment of the invention;
Fig. 3 is the flow chart according to the terminal access of the embodiment of the invention;
Fig. 4 is the flow chart that switches according to the terminal of the embodiment of the invention;
Fig. 5 is the structured flowchart according to the terminal switching device shifter of the embodiment of the invention;
Fig. 6 is the structured flowchart according to the judge module of the embodiment of the invention;
Fig. 7 is the structured flowchart according to the handover module of the embodiment of the invention;
Fig. 8 is the structured flowchart of terminal switching device shifter according to the preferred embodiment of the invention; And
Fig. 9 is the structured flowchart of another kind of according to the preferred embodiment of the invention terminal switching device shifter.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.
Embodiment 1
The present embodiment provides a kind of terminal switching method, and Fig. 1 is the flow chart according to the terminal switching method of the embodiment of the invention, and as shown in Figure 1, this terminal switching method comprises step S102 to S104.
Step S102: when the load of the first residential quarter has surpassed the first predetermined threshold value, judge whether the load of the second residential quarter that is associated with the first residential quarter is lower than the second predetermined threshold value, wherein, the first residential quarter and the second residential quarter are for adopting two residential quarters of different frequency range.
Step S104: when the load of the second residential quarter is lower than the second predetermined threshold value, the first terminal in the first residential quarter is switched to the second residential quarter that is associated with the first residential quarter.
Pass through above-mentioned steps, after having terminal to access the first residential quarter, when the load of the first residential quarter has surpassed the first predetermined threshold value, whether the load of then judging the second residential quarter that is associated with the first residential quarter is lower than the second predetermined threshold value, wherein, the first residential quarter and the second residential quarter are for adopting two residential quarters of different frequency range, if when judging the load of the second residential quarter and being lower than the second predetermined threshold value, then the first terminal in the first residential quarter is switched to the second residential quarter that is associated with the first residential quarter, realized according to the load condition of the first residential quarter and the second residential quarter the first terminal in the first residential quarter being switched to the second residential quarter, avoided in Dual Band network the problem of between different frequency range, carrying out blind switching owing to the terminal that adopts BCCH Channel Technology altogether to cause, thereby Effective Raise appointment success rate and the handover success rate of terminal, and then improved the performance of network; Simultaneously, the first residential quarter and frequency range corresponding to the second residential quarter difference, load condition according to the first residential quarter and the second residential quarter is switched terminal between the first residential quarter and the second residential quarter, can avoid a certain frequency range the phenomenon of resource congestion to occur, traffic between effectively balanced different frequency range, thus help to improve the communication quality of network.
Preferably, load in the first residential quarter has surpassed the first predetermined threshold value, and when the load of the second residential quarter is lower than the second predetermined threshold value, first terminal in the first residential quarter is switched to the second residential quarter with the first cell association, be about to the Target cell that switch as first terminal the second residential quarter, when needing to switch, pay the utmost attention to first terminal is switched to the second residential quarter, avoid in the sequencing queue of adjacent cells in order select target residential quarter, thereby improved the efficient that terminal is switched.
In force, the first residential quarter in above-described embodiment and frequency range corresponding to the second residential quarter difference, the first residential quarter and the second residential quarter can not share the BCCH channel, thereby avoid in Dual Band network owing to adopting some problems that the BCCH Channel Technology causes that are total to, the first residential quarter and the second residential quarter can preferably be used single-band antenna and do not used dual-band antenna simultaneously, therefore, do not need to carry out coordinating of dual-band antenna consistent yet, thereby not only reduced the difficulty that the antenna cost has also reduced the network optimization.
For the load condition according to the first residential quarter and the second residential quarter effectively switches to the second residential quarter with the first terminal in the first residential quarter, improve appointment success rate and the handover success rate of terminal, in this preferred embodiment, when providing a kind of load of the first residential quarter to surpass the first predetermined threshold value, judge whether the load of the second residential quarter that is associated with the first residential quarter is lower than the method for the second predetermined threshold value, for example, after having terminal to access the first residential quarter, the load of the first residential quarter is during greater than the TCH congestion threshold value of the first residential quarter, and whether the load of judging the second residential quarter is less than the TCH congestion threshold value of the second residential quarter; If the load of the second residential quarter less than the TCH congestion threshold value of the second residential quarter, is then judged the first terminal in the first residential quarter is switched to the second residential quarter that is associated with the first residential quarter.
In above-mentioned preferred embodiment, after having great amount of terminals to access the first residential quarter, may cause the load of the first residential quarter too high, whether the load of at first judging the first residential quarter is greater than the TCH congestion threshold value of the first residential quarter, if the load of the first residential quarter is greater than the TCH congestion threshold value of the first residential quarter, then judge with the load of the second residential quarter of the first cell association whether less than the TCH congestion threshold value of the second residential quarter, when the load of the second residential quarter during less than the TCH congestion threshold value of the second residential quarter, judge the first terminal in the first residential quarter is switched to the second residential quarter surely, if the load of the second residential quarter is greater than the TCH congestion threshold value of the first residential quarter, then the first terminal in the first residential quarter continues allocated channel on the first residential quarter, communicate, realized can be simultaneously according to the load condition of the first residential quarter and the first residential quarter, first terminal in the first residential quarter is switched to the second residential quarter, thereby greatly improved appointment success rate and the handover success rate of terminal between double frequency.
Handover success rate in order to ensure terminal, in this preferred embodiment, a kind of method that first terminal in the first residential quarter is switched to the second residential quarter that is associated with the first residential quarter is provided, for example, when the load in the first residential quarter is higher than the default congestion threshold value of the first residential quarter, when allowing the double frequency traffic to switch, whether the load of judging the first residential quarter is greater than the TCH congestion threshold value of the first residential quarter; If the load of the first residential quarter, is then judged TA (the expression terminal is apart from the distance of base station, and 1TA the is equivalent to 550m) value of the second residential quarter greater than the TCH congestion threshold value of the first residential quarter and whether is lower than default dual-frequency network switching TA threshold value; If the TA value of the second residential quarter is lower than the descending level of default dual-frequency network switching TA threshold value and the second residential quarter greater than default dual-frequency network switch level threshold value, then the first terminal with the first residential quarter switches to the second residential quarter that is associated with the first residential quarter.
In above-mentioned preferred embodiment, after having great amount of terminals to access the first residential quarter, may cause the load of the first residential quarter too high, at first judge the load of the first residential quarter greater than the TCH congestion threshold value of the first residential quarter, judge whether to allow the double frequency traffic to switch, when allowing the double frequency traffic to switch, after the TCH congestion threshold value of load less than the second residential quarter of the load of the first residential quarter greater than the TCH congestion threshold value of the first residential quarter and the second residential quarter, if being lower than default dual-frequency network, the TA value of the second residential quarter switches the descending level of TA threshold value and the second residential quarter greater than default dual-frequency network switch level threshold value, then the first terminal in the first residential quarter is switched to the second residential quarter that is associated with the first residential quarter, therefore, guaranteed the handover success rate of terminal.
Certainly, in above preferred embodiment, do not allow the double frequency traffic to switch if judge, then when satisfying other-end switching condition (other switching conditions except the condition that above-mentioned dual-frequency network traffic switches), with the second residential quarter as preferred switching target small area, certainly, when the load in the first residential quarter and the second residential quarter all is higher than separately default congestion threshold value, will terminal not carried out switching between two-band.
For the traffic between the balanced two-band effectively, load condition according to the first residential quarter and the second residential quarter accesses suitable residential quarter with terminal, in this preferred embodiment, above-mentioned terminal switching method also comprises: when the load in the first residential quarter has surpassed the first predetermined threshold value, whether the load of judging the second residential quarter that is associated with the first residential quarter is lower than before the second predetermined threshold value, when the second terminal accesses the second residential quarter, when the load of the second residential quarter has surpassed the TCH portion gate limit value of the second residential quarter, judge whether the load of the first residential quarter that is associated with the second residential quarter is lower than the TCH portion gate limit value of the first residential quarter; The load of the first residential quarter is lower than the TCH portion gate limit value of the first residential quarter and the access level of the first residential quarter is higher than when presetting minimum access level, and the second terminal is accessed the first residential quarter.
In the above-described embodiments, when having the second terminal to prepare access the second residential quarter, judge at first whether the load of the second residential quarter has surpassed the TCH portion gate limit value of the second residential quarter, when having surpassed the TCH portion gate limit value of the second residential quarter, judge again whether the load of the first residential quarter that is associated with the second residential quarter is lower than the TCH portion gate limit value of the first residential quarter, when the load of the first residential quarter has surpassed the TCH portion gate limit value of the first residential quarter, then continue the second terminal is accessed the second residential quarter, and then communication, when the load of the first residential quarter is lower than the TCH portion gate limit value of the first residential quarter, the second terminal is accessed the first residential quarter, to reach the effect of the traffic between balanced the first residential quarter and the second residential quarter.
Behind terminal access residential quarter, switch continually, in this preferred embodiment, when the load in the first residential quarter that is associated with the second residential quarter is higher than the TCH portion gate limit value of the first residential quarter, judge whether the load of the second residential quarter is higher than the TCH congestion threshold value of the second residential quarter; If the load of the second residential quarter is higher than the TCH congestion threshold value of the second residential quarter, judge whether the load of the first residential quarter is higher than the TCH congestion threshold value of the first residential quarter; When the load in the first residential quarter is lower than the TCH congestion threshold value of the first residential quarter, when the TA value of the first residential quarter is lower than descending level that default dual-frequency network switches TA threshold value and the first residential quarter greater than default dual-frequency network switch level threshold value, the second terminal is accessed the first residential quarter.
In above preferred embodiment, when the second terminal is prepared access the second residential quarter, when the load that is higher than the TCH congestion threshold value of the second residential quarter and judges the first residential quarter when the load of the second residential quarter is higher than the TCH portion gate limit value of the first residential quarter, judge whether the load of the second residential quarter is higher than the TCH congestion threshold value of the second residential quarter, if be not higher than, then the second terminal is accessed the second residential quarter, if be higher than the TCH congestion threshold value of two residential quarters, judge whether the load of the first residential quarter is lower than the TCH congestion threshold value of the first residential quarter, if be lower than, then the second terminal is accessed the first residential quarter, if be higher than, then the second terminal is accessed the separately large residential quarter of difference of the load congestion threshold value relatively separately of residential quarter, to avoid after terminal accesses certain residential quarter, the load of this residential quarter is original just very large, is easy to be higher than the congestion threshold value of this residential quarter and needs this terminal to switch soon, thereby avoid switching continually behind the terminal access residential quarter.
Preferably, first terminal in above-mentioned each preferred embodiment can be identical terminal with the second terminal, it also can be not identical terminal, namely when the second terminal is prepared access the second residential quarter, the TCH portion gate limit value that has surpassed the second residential quarter when the load of the second residential quarter, and when the load of the first residential quarter is lower than the TCH portion gate limit value of the first residential quarter, the second terminal is accessed the first residential quarter, after having a large amount of terminals to access the first residential quarter, during the default congestion threshold of the first residential quarter that the load of the first residential quarter surpasses, judge the terminal in the first residential quarter is switched to the second residential quarter with the first cell association, this terminal may be the second terminal (this moment, first terminal was identical terminal with the second terminal), it also may be other the terminal except the second terminal, be first terminal, (this moment, first terminal was not identical terminal with the second terminal).
In order to ensure network capacity, the traffic of balanced different frequency range, the frequency range that above-mentioned the first residential quarter is corresponding different with the second residential quarter, in this preferred embodiment, for example, frequency range corresponding to the first residential quarter is 900MHz, frequency range corresponding to the second residential quarter is 1800MHz; Perhaps frequency range corresponding to the second residential quarter is 900MHz, frequency range corresponding to the first residential quarter is 1800MHz, related by the first residential quarter and the second residential quarter, in Dual Band network, residential quarter corresponding to 1800MHz frequency range can absorb the voice telephone traffic of residential quarter corresponding to 900MHz frequency range effectively, thereby realized that the resource between the Dual Band network small area can share, the effectively balanced traffic of different frequency range when guaranteeing network capacity, simultaneously, the default congestion threshold value of the first residential quarter is higher than its TCH portion gate limit value, the default congestion threshold value of the second residential quarter is higher than its TCH portion gate limit value, when increasing as best one can the telephone traffic of residential quarter corresponding to a certain frequency range, the TCH portion gate limit value that this residential quarter can be set is higher than the TCH portion gate limit value of residential quarter corresponding to other frequency ranges, for example, the frequency range corresponding take the first residential quarter is as 900MHz, frequency range corresponding to the second residential quarter is that 1800MHz is example, in order to increase as best one can the telephone traffic of the first residential quarter, the TCH portion gate limit value that the first residential quarter can be set is higher than the TCH portion gate limit value of the second residential quarter.
Below in conjunction with accompanying drawing and example above-mentioned each preferred embodiment is described in detail.
This example is the flow process of terminal directed retry, and this example is applicable but be not limited to comprise the scene of following content:
1) as shown in Figure 2, under GSM double frequency networking scene, realize the associating covering by two different frequency ranges residential quarter (900MHz and 1800MHz), same level, residential quarter A and residential quarter B cover as main, and frequency range is 900MHz; Residential quarter C covers as absorbing traffic, and frequency range is 1800MHz.
2) network side is residential quarter B and residential quarter C with the neighbor cell configuration of residential quarter A, residential quarter A is set to related each other residential quarter with residential quarter C simultaneously, (be equivalent to the second residential quarter) take residential quarter A as current area, residential quarter C is that associated cell (being equivalent to the first residential quarter) is example.
This example provides a kind of flow process of terminal directed retry, and as shown in Figure 3, the flow process of this terminal directed retry comprises that step S302 is to step S322.
Step S302:MS (terminal) prepares to access at current area A.
Step S304: the load condition of network side inquiry current area A.
Step S306: network side judges whether the load of current area A is higher than current area A " TCH channel allocation threshold value ", if so, then goes to step S308, if not, then goes to step S322.
Step S308: the load condition of network side inquiry associated cell C.
Step S310: network side judges whether the load of associated cell C is lower than associated cell C " TCH channel allocation threshold value ", if so, then goes to step S312, if not, then goes to step S314.
Step S312: network side judges whether associated cell C satisfies minimum access level, if so, then goes to step S320, if not, then goes to step S322.
Step S314: network side judges whether the load of current area A is higher than the congestion threshold value of current area A, if so, then goes to step S316, if not, then goes to step S322.
Step S316: network side judges whether the load of associated cell C is higher than the congestion threshold value of associated cell C, if so, then goes to step S322, if not, then goes to step S318.
Step S318: network side judges whether the TA value of associated cell C is lower than default dual-frequency network and switches the descending level of TA threshold value and associated cell C greater than default dual-frequency network switch level threshold value, if, then go to step S320, if not, then go to step S322.
Step S320: network side carries out directed retry, and MS is assigned to associated cell C, converses among the MS access associated cell C, and flow process finishes.
Step S322: network side is assigned to current area A with MS, converses among the MS access current area A, and flow process finishes.
This example is the flow process that terminal is switched, and need to prove, this example is applicable but be not limited to comprise the scene of following content:
1) as shown in Figure 2, under GSM double frequency networking scene, realize the associating covering by two different frequency ranges residential quarter (900MHz and 1800MHz), same level, residential quarter A and residential quarter B cover as main, and frequency range is 900MHz; Residential quarter C covers as absorbing traffic, and frequency range is 1800MHz.
2) network side is residential quarter B and residential quarter C with the neighbor cell configuration of residential quarter A, residential quarter A is set to related each other residential quarter with residential quarter C simultaneously, (be equivalent to the first residential quarter) take residential quarter A as current area, residential quarter C is that associated cell (being equivalent to the second residential quarter) is example.
The flow process that this example provides a kind of terminal to switch, as shown in Figure 4, the flow process that this terminal is switched comprises that step S402 is to step S414.
Step S402:MS (terminal) prepares to switch.
Step S404: network side judges whether to allow to carry out the dual-frequency network traffic and switches, and if so, then goes to step S406, if not, then goes to step S414.
Step S406: the load condition of network side inquiry current area A, and judge whether the load of current area A is higher than current area A " TCH channel congestion threshold value ", if so, then goes to step S408, if not, then goes to step S414.
Step S408: network side judges that the TA of associated cell C whether less than " dual-frequency network switches the TA threshold value ", if so, then goes to step S410, if not, then goes to step S414.
Step S410: network side judges that the descending level of associated cell C whether greater than " dual-frequency network switch level threshold value ", if so, then goes to step S412, if not, then goes to step S414.
Step S412: network side carries out the dual-frequency network traffic with associated cell C as Target cell and switches, and flow process finishes;
Step S414:MS does not carry out the dual-frequency network traffic and switches, and flow process finishes.
Embodiment 2
The present embodiment provides a kind of terminal switching device shifter, as shown in Figure 5, this terminal switching device shifter comprises: the first judge module 502, when having surpassed the first predetermined threshold value for the load in the first residential quarter, whether the load of judging the second residential quarter that is associated with the first residential quarter is lower than the second predetermined threshold value, wherein, the first residential quarter and the second residential quarter are for adopting two residential quarters of different frequency range; Handover module 504 is connected to the first judge module 502, when being lower than the second predetermined threshold value for the load in the second residential quarter, the first terminal in the first residential quarter is switched to the second residential quarter that is associated with the first residential quarter.
In the above-described embodiments, after having terminal to access the first residential quarter, when the load of the first residential quarter has surpassed the first predetermined threshold value, the first judge module 502 judges whether the load of the second residential quarter that is associated with the first residential quarter is lower than the second predetermined threshold value, wherein, the first residential quarter and the second residential quarter are for adopting two residential quarters of different frequency range, if when judging the load of the second residential quarter and being lower than the second predetermined threshold value, handover module 504 switches to the first terminal in the first residential quarter the second residential quarter that is associated with the first residential quarter, realized according to the load condition of the first residential quarter and the second residential quarter the first terminal in the first residential quarter being switched to the second residential quarter, avoided in Dual Band network the problem of between different frequency range, carrying out blind switching owing to the terminal that adopts BCCH Channel Technology altogether to cause, thereby Effective Raise appointment success rate and the handover success rate of terminal, and then improved the performance of network; Simultaneously, the first residential quarter and frequency range corresponding to the second residential quarter difference, load condition according to the first residential quarter and the second residential quarter is switched terminal between the first residential quarter and the second residential quarter, can avoid a certain frequency range the phenomenon of resource congestion to occur, traffic between effectively balanced different frequency range, thus help to improve the communication quality of network.
Preferably, load in the first residential quarter has surpassed the first predetermined threshold value, and when the load of the second residential quarter is lower than the second predetermined threshold value, first terminal in the first residential quarter is switched to the second residential quarter with the first cell association, be about to the Target cell that switch as first terminal the second residential quarter, when needing to switch, pay the utmost attention to first terminal is switched to the second residential quarter, avoid in the sequencing queue of adjacent cells in order select target residential quarter, thereby improved the efficient that terminal is switched.
In force, the first residential quarter in above-described embodiment and frequency range corresponding to the second residential quarter difference, the first residential quarter and the second residential quarter can not share the BCCH channel, thereby avoid in Dual Band network owing to adopting some problems that the BCCH Channel Technology causes that are total to, the first residential quarter and the second residential quarter can preferably be used single-band antenna and do not used dual-band antenna simultaneously, therefore, do not need to carry out coordinating of dual-band antenna consistent yet, thereby not only reduced the difficulty that the antenna cost has also reduced the network optimization.
For the load condition according to the first residential quarter and the second residential quarter effectively switches to the second residential quarter with the first terminal in the first residential quarter, improve appointment success rate and the handover success rate of terminal, in this preferred embodiment, as shown in Figure 6, above-mentioned the first judge module 502 comprises: the first judging unit 5022, the load that is used for the first residential quarter is during greater than the TCH congestion threshold value of the first residential quarter, and whether the load of judging the second residential quarter is less than the TCH congestion threshold value of the second residential quarter; Processing unit 5024 is connected to the first judging unit 5022, is used for, judging first terminal being switched to the second residential quarter that is associated with the first residential quarter during less than the TCH congestion threshold value of the second residential quarter at the load of the second residential quarter.
In above-mentioned preferred embodiment, after having great amount of terminals to access the first residential quarter, may cause the load of the first residential quarter too high, whether the load of at first judging the first residential quarter is greater than the TCH congestion threshold value of the first residential quarter, if the load of the first residential quarter is greater than the TCH congestion threshold value of the first residential quarter, whether the first judging unit 5022 is judged with the load of the second residential quarter of the first cell association less than the TCH congestion threshold value of the second residential quarter, when the load of the second residential quarter during less than the TCH congestion threshold value of the second residential quarter, processing unit 5024 is judged the first terminal in the first residential quarter is switched to the second residential quarter, if the load of the second residential quarter is greater than the TCH congestion threshold value of the first residential quarter, then the first terminal in the first residential quarter continues allocated channel on the first residential quarter, communicate, realized can be simultaneously according to the load condition of the first residential quarter and the first residential quarter, first terminal in the first residential quarter is switched to the second residential quarter, thereby greatly improved appointment success rate and the handover success rate of terminal.
Handover success rate in order to ensure terminal, in this preferred embodiment, as shown in Figure 7, above-mentioned handover module 504 comprises: the second judging unit 5042, be used for when allowing the double frequency traffic to switch, whether the load of judging the first residential quarter is greater than the TCH congestion threshold value of the first residential quarter; The 3rd judging unit 5044 is connected to the second judging unit 5042, is used for during greater than the TCH congestion threshold value of the first residential quarter, judging that whether the TA value of the second residential quarter is less than default dual-frequency network switching TA threshold value at the load of the first residential quarter; Switch unit 5046, be connected to the 3rd judging unit 5044, the descending level that is used for switching TA threshold value and the second residential quarter less than default dual-frequency network in the TA of the second residential quarter value switches to terminal the second residential quarter that is associated with the first residential quarter during greater than the dual-frequency network switch level threshold value preset.
In above-mentioned preferred embodiment, after having great amount of terminals to access the first residential quarter, may cause the load of the first residential quarter too high, at first judge the load of the first residential quarter greater than the TCH congestion threshold value of the first residential quarter, when allowing the dual-frequency network traffic to switch, the second judging unit 5042 is judged the load of the first residential quarter greater than the TCH congestion threshold value of the first residential quarter, and after the TCH congestion threshold value of the load of the second residential quarter less than the second residential quarter, the 3rd judging unit 5044 judges whether the TA value of the second residential quarter is lower than default dual-frequency network and switches the TA threshold value; If being lower than default dual-frequency network, the TA value of the second residential quarter switches the descending level of TA threshold value and the second residential quarter greater than default dual-frequency network switch level threshold value, switch unit 5046 switches to the first terminal in the first residential quarter the second residential quarter that is associated with the first residential quarter, therefore, guaranteed the handover success rate of terminal.
Certainly, in above preferred embodiment, do not allow the dual-frequency network traffic to switch if judge, then when satisfying other-end switching condition (other switching conditions except the condition that above-mentioned dual-frequency network traffic switches), with the second residential quarter as preferred switching target small area, certainly, when the load in the first residential quarter and the second residential quarter all is higher than separately default congestion threshold value, will terminal not carried out switching between two-band.
For the traffic between the balanced two-band effectively, load condition according to the first residential quarter and the second residential quarter accesses suitable residential quarter with terminal, in this preferred embodiment, as shown in Figure 8, above-mentioned terminal switching device shifter also comprises: the second judge module 506, be used for when the second terminal accesses the second residential quarter, when the load of the second residential quarter has surpassed the TCH portion gate limit value of the second residential quarter, judge whether the load of the first residential quarter that is associated with the second residential quarter is lower than the TCH portion gate limit value of the first residential quarter; The first access module 508 is connected to the second judge module 506, when being used for access level that load in the first residential quarter is lower than the TCH portion gate limit value of the first residential quarter and the first residential quarter and being higher than default minimum access level, the second terminal is accessed the first residential quarter.
In the above-described embodiments, when having the second terminal to prepare access the second residential quarter, the second judge module 506 judges at first whether the load of the second residential quarter has surpassed the TCH portion gate limit value of the second residential quarter, when having surpassed the TCH portion gate limit value of the second residential quarter, judge again whether the load of the first residential quarter that is associated with the second residential quarter is lower than the TCH portion gate limit value of the first residential quarter, when the load of the first residential quarter has surpassed the TCH portion gate limit value of the first residential quarter, then continue the second terminal is accessed the second residential quarter, and then communication, when the load of the first residential quarter is lower than the TCH portion gate limit value of the first residential quarter, the first access module 508 accesses the first residential quarter with the second terminal, to reach the effect of the traffic between balanced the first residential quarter and the second residential quarter.
Behind terminal access residential quarter, switch continually, in this preferred embodiment, as shown in Figure 9, above-mentioned terminal switching device shifter also comprises: the 3rd judge module 510, when being higher than the TCH portion gate limit value of the first residential quarter for the load in the first residential quarter that is associated with the second residential quarter, judge whether the load of the second residential quarter is higher than the TCH congestion threshold value of the second residential quarter; The 4th judge module 512 is connected to the 3rd judge module 510, is higher than the TCH congestion threshold value of the second residential quarter for the load in the second residential quarter, judges whether the load of the first residential quarter is higher than the TCH congestion threshold value of the first residential quarter; The second access module 514, be connected to the 4th judge module 512, when being lower than the TCH congestion threshold value of the first residential quarter for the load in the first residential quarter, when the TA value of the first residential quarter is lower than descending level that default dual-frequency network switches TA threshold value and the first residential quarter greater than default dual-frequency network switch level threshold value, the second terminal is accessed the first residential quarter.
In above preferred embodiment, when the second terminal is prepared access the second residential quarter, when the load that is higher than the TCH congestion threshold value of the second residential quarter and judges the first residential quarter when the load of the second residential quarter is higher than the TCH portion gate limit value of the first residential quarter, the 3rd judge module 510 judges whether the load of the second residential quarter is higher than the TCH congestion threshold value of the second residential quarter, if be not higher than, then the second terminal is accessed the second residential quarter, if be higher than the TCH congestion threshold value of two residential quarters, the 4th judge module 512 judges whether the load of the first residential quarter is lower than the TCH congestion threshold value of the first residential quarter, if be lower than, when the TA value of the first residential quarter is lower than descending level that default dual-frequency network switches TA threshold value and the first residential quarter greater than default dual-frequency network switch level threshold value, the second terminal is accessed the first residential quarter, the second access module 514 accesses the first residential quarter with the second terminal, if be higher than, then the second terminal is accessed the separately large residential quarter of difference of the load congestion threshold value relatively separately of residential quarter, to avoid after terminal accesses certain residential quarter, the load of this residential quarter is original just very large, be easy to be higher than the congestion threshold value of this residential quarter and need this terminal to switch soon, thereby avoid switching continually behind the terminal access residential quarter.
Preferably, first terminal in above-mentioned each preferred embodiment can be identical terminal with the second terminal, it also can be not identical terminal, namely when the second terminal is prepared access the second residential quarter, the TCH portion gate limit value that has surpassed the second residential quarter when the load of the second residential quarter, and when the load of the first residential quarter is lower than the TCH portion gate limit value of the first residential quarter, the second terminal is accessed the first residential quarter, after having a large amount of terminals to access the first residential quarter, during the default congestion threshold of the first residential quarter that the load of the first residential quarter surpasses, judge the terminal in the first residential quarter is switched to the second residential quarter with the first cell association, this terminal may be the second terminal (this moment, first terminal was identical terminal with the second terminal), it also may be other the terminal except the second terminal, be first terminal, (this moment, first terminal was not identical terminal with the second terminal).
In order to ensure network capacity, the traffic of balanced different frequency range, the frequency range that above-mentioned the first residential quarter is corresponding different with the second residential quarter, in this preferred embodiment, for example, frequency range corresponding to the first residential quarter is 900MHz, frequency range corresponding to the second residential quarter is 1800MHz; Perhaps frequency range corresponding to the second residential quarter is 900MHz, frequency range corresponding to the first residential quarter is 1800MHz, related by the first residential quarter and the second residential quarter, in Dual Band network, residential quarter corresponding to 1800MHz frequency range can absorb the voice telephone traffic of residential quarter corresponding to 900MHz frequency range effectively, thereby realized that the resource between the Dual Band network small area can share, the effectively balanced traffic of different frequency range when guaranteeing network capacity, simultaneously, the default congestion threshold value of the first residential quarter is higher than its TCH portion gate limit value, the default congestion threshold value of the second residential quarter is higher than its TCH portion gate limit value, when increasing as best one can the telephone traffic of residential quarter corresponding to a certain frequency range, the TCH portion gate limit value that this residential quarter can be set is higher than the TCH portion gate limit value of residential quarter corresponding to other frequency ranges, for example, the frequency range corresponding take the first residential quarter is as 900MHz, frequency range corresponding to the second residential quarter is that 1800MHz is example, in order to increase as best one can the telephone traffic of the first residential quarter, the TCH portion gate limit value that the first residential quarter can be set is higher than the TCH portion gate limit value of the second residential quarter.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
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 modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. terminal switching method is characterized in that comprising:
When the load of described the first residential quarter has surpassed the first predetermined threshold value, whether the load of judging the second residential quarter that is associated with described the first residential quarter is lower than the second predetermined threshold value, wherein, described the first residential quarter and described the second residential quarter are for adopting two residential quarters of different frequency range;
When the load of described the second residential quarter is lower than described the second predetermined threshold value, the first terminal in described the first residential quarter is switched to the second residential quarter that is associated with described the first residential quarter.
2. method according to claim 1 is characterized in that, when the load of described the first residential quarter had surpassed the first predetermined threshold value, whether the load of the second residential quarter that judgement is associated with described the first residential quarter is lower than the second predetermined threshold value comprised:
The load of described the first residential quarter is during greater than the Traffic Channel TCH congestion threshold value of described the first residential quarter, and whether the load of judging described the second residential quarter is less than the TCH congestion threshold value of described the second residential quarter;
If the load of described the second residential quarter less than the TCH congestion threshold value of described the second residential quarter, is then judged described first terminal is switched to the second residential quarter that is associated with described the first residential quarter.
3. method according to claim 1 is characterized in that, when the load of described the second residential quarter is lower than described the second predetermined threshold value, the described first terminal in described the first residential quarter is switched to the second residential quarter that is associated with described the first residential quarter comprise:
When allowing the double frequency traffic to switch, judge whether the load of described the first residential quarter is higher than the TCH congestion threshold value of described the first residential quarter;
If the load of described the first residential quarter is higher than the TCH congestion threshold value of described the first residential quarter, judge then whether the Timing Advance TA value of described the second residential quarter is lower than default dual-frequency network switching TA threshold value;
If the TA value of described the second residential quarter is lower than the descending level of default dual-frequency network switching TA threshold value and described the second residential quarter greater than default dual-frequency network switch level threshold value, then described first terminal is switched to the second residential quarter that is associated with described the first residential quarter.
4. each described method in 3 according to claim 1, it is characterized in that, when the load in described the first residential quarter has surpassed the first predetermined threshold value, judge whether the load of the second residential quarter that is associated with described the first residential quarter is lower than before the second predetermined threshold value, also comprise:
When the second terminal accesses described the second residential quarter, when the load of described the second residential quarter has surpassed the TCH portion gate limit value of described the second residential quarter, judge whether the load of the first residential quarter that is associated with described the second residential quarter is lower than the TCH portion gate limit value of described the first residential quarter;
The load of described the first residential quarter is lower than the TCH portion gate limit value of described the first residential quarter and the access level of described the first residential quarter is higher than when presetting minimum access level, and described the second terminal is accessed described the first residential quarter.
5. method according to claim 4 is characterized in that,
When the load in the first residential quarter that is associated with described the second residential quarter is higher than the TCH portion gate limit value of described the first residential quarter, judge whether the load of described the second residential quarter is higher than the TCH congestion threshold value of described the second residential quarter;
If the load of described the second residential quarter is higher than the TCH congestion threshold value of described the second residential quarter, judge whether the load of described the first residential quarter is higher than the TCH congestion threshold value of described the first residential quarter;
When the load in described the first residential quarter is lower than the TCH congestion threshold value of described the first residential quarter, when the TA value of described the first residential quarter is lower than descending level that default dual-frequency network switches TA threshold value and described the first residential quarter greater than default dual-frequency network switch level threshold value, described the second terminal is accessed described the first residential quarter.
6. each described method in 3 according to claim 1 is characterized in that,
Frequency range corresponding to described the first residential quarter is 900MHz, and frequency range corresponding to described the second residential quarter is 1800MHz; Perhaps
Frequency range corresponding to described the second residential quarter is 900MHz, and frequency range corresponding to described the first residential quarter is 1800MHz.
7. terminal switching device shifter is characterized in that comprising:
The first judge module, when having surpassed the first predetermined threshold value for the load in described the first residential quarter, whether the load of judging the second residential quarter that is associated with described the first residential quarter is lower than the second predetermined threshold value, wherein, described the first residential quarter and described the second residential quarter are for adopting two residential quarters of different frequency range;
Handover module when being lower than described the second predetermined threshold value for the load in described the second residential quarter, switches to the first terminal in described the first residential quarter the second residential quarter that is associated with described the first residential quarter.
8. device according to claim 7 is characterized in that, described the first judge module comprises:
The first judging unit is used at the load of described the first residential quarter during greater than the Traffic Channel TCH congestion threshold value of described the first residential quarter, and whether the load of judging described the second residential quarter is less than the TCH congestion threshold value of described the second residential quarter;
Processing unit is used for, judging described first terminal being switched to the second residential quarter that is associated with described the first residential quarter during less than the TCH congestion threshold value of described the second residential quarter at the load of described the second residential quarter.
9. device according to claim 8 is characterized in that, described handover module comprises:
The second judging unit is used for judging whether the load of described the first residential quarter is higher than the TCH congestion threshold value of described the first residential quarter when allowing the double frequency traffic to switch;
The 3rd judging unit when being higher than the TCH congestion threshold value of described the first residential quarter for the load in described the first residential quarter, judges whether the Timing Advance TA value of described the second residential quarter switches the TA threshold value less than default dual-frequency network;
Switch unit, the descending level that is used for switching TA threshold value and described the second residential quarter less than default dual-frequency network in the TA of described the second residential quarter value switches to described first terminal the second residential quarter that is associated with described the first residential quarter during greater than the dual-frequency network switch level threshold value preset.
10. each described device in 9 according to claim 7 also comprises:
The second judge module, be used for when the second terminal accesses described the second residential quarter, when the load of described the second residential quarter has surpassed the TCH portion gate limit value of described the second residential quarter, judge whether the load of the first residential quarter that is associated with described the second residential quarter is lower than the TCH portion gate limit value of described the first residential quarter;
The first access module when being used for access level that load in described the first residential quarter is lower than the TCH portion gate limit value of described the first residential quarter and described the first residential quarter and being higher than default minimum access level, accesses described the first residential quarter with described the second terminal.
11. device according to claim 10 is characterized in that, also comprises:
The 3rd judge module when being higher than the TCH portion gate limit value of described the first residential quarter for the load in the first residential quarter that is associated with described the second residential quarter, judges whether the load of described the second residential quarter is higher than the TCH congestion threshold value of described the second residential quarter;
The 4th judge module is used for the TCH congestion threshold value that load in described the second residential quarter is higher than described the second residential quarter, judges whether the load of described the first residential quarter is higher than the TCH congestion threshold value of described the first residential quarter;
The second access module, when also being lower than the TCH congestion threshold value of described the first residential quarter for the load in described the first residential quarter, when the TA value of described the first residential quarter is lower than descending level that default dual-frequency network switches TA threshold value and described the first residential quarter greater than default dual-frequency network switch level threshold value, described the second terminal is accessed described the first residential quarter.
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| CN103369596B (en) | 2016-09-14 |
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