CN102404810B - Method for cell handover in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system and device for cell handover in TD-SCDMA system - Google Patents
Method for cell handover in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system and device for cell handover in TD-SCDMA system Download PDFInfo
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Abstract
The invention discloses a method for cell handover in a TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system and a device for the cell handover in the TD-SCDMA system. The method comprises the following steps of: acquiring the RSCP (Received Signal Code Power) measured value of a current cell and the RSCP measured value of each neighbor cell of the current cell; selecting neighbor cells respectively with an RSCP measured value larger than that of the current cell as target cells to be handed over; determining the priority of each of the target cells to be handed over according to the size of the RSCP measured values corresponding to the target cells to be handed over; and determining handover target cells from the target cells to be handed over according to the priorities of the target cells to be handed over, and the size relationship among corresponding cell signal quality measured values and preset threshold values, and carrying out cell handover. In the invention, the RSCP measured values and the cell signal quality measured values are adopted to judge whether the neighbor cells of the current cell meet cell handover or not, thereby achieving the aim that the cell mistaken handover is avoided by using the cell signal quality measured values when the RSCP measured values are inaccurate or on the high side due to the fact that interference exists in a frequency point where the cell is located.
Description
Technical field
The present invention relates to communication technical field, in particular, relate to method and the device of a kind of TD-SCDMA system (Time Division-Synchronous Code Division Multiple Access, TDS-CDMA system) cell merge.
Background technology
In a communications system, when subscriber equipment moves to another community from a community (referring to the coverage of base station or base station), needing to keep the not interrupt communication of mobile subscriber to carry out channel switching, namely completing cell merge.At present, in order to prevent occurring that when carrying out cell merge the mistake between community switches, the measurement item adopting assessment to switch determines that UE (User Equipment, subscriber equipment) finally carries out the community switched.
In TD-SCDMA system, measurement item for assessment of switching is PCCPCH (Primary Common Control Physical Channel, Primary Common Control Physical Channel) RSCP (Received Signal Code Power, received signal code power).Wherein, PCCPCH is fixedly carried on time slot TS0 (Timeslot, time slot) 0,1 code channel on, be according to obtaining the channel estimating of Midamble (training sequence in TD-SCDMA system physical channel burst structure) to the measurement of its RSCP.Therefore, utilize and the RSCP relation of Serving cell and adjacent area thereof is assessed, finally judge whether the community carrying out assessing is suitable as switching target small area, if improper, continue to carry out handover evaluation to other communities; If be applicable to, UE (User Equipment, subscriber equipment) is reported network side, by switching target small area alternatively, this community.Referring to accompanying drawing 1 is the schematic diagram carrying out determining switching target small area in prior art.
But, in the cell switch process of prior art, carry out assess switch basis for estimation be the Measurement accuracy being based upon RSCP basis on carry out.And in current real network environment, place, community frequency is subject to following two kinds of situations impact, one, and the frequency in system is due to network miss-configured neighboring cells or this frequency also existing strong community, and this community not for domestic consumer service is provided time, make this frequency to exist the interference of unknown co-frequency cell; Its two, frequency may exist the interference of other electronic equipments; Owing to there is above-mentioned interference, make in the process of carrying out cell merge, cause the adjacent area RSCP measured value on this frequency higher.Therefore, determining cause deviation in the process of switching target small area according to RSCP measured value, and then causing community to switch by mistake.
Summary of the invention
In view of this, the invention provides a kind of method and device of TD-SCDMA system cell merge, to solve in prior art because the interference on subdistrict frequency point makes RSCP measured value higher, cause the problem that community switches by mistake.
For achieving the above object, the invention provides following technical scheme:
A method for TD-SCDMA system cell merge, comprising:
Obtain the received signal code power RSCP measured value of current area and each adjacent area thereof;
Choose RSCP measured value and be greater than the adjacent area of described current area as to be switched Target cell;
According to the RSCP measured value size that Target cell to be switched described in each is corresponding, determine the priority of to be switched Target cell described in each;
According to the priority of described to be switched Target cell described in each, and the magnitude relationship of the cell signal quality measured values that described in each, to be switched Target cell is corresponding and predetermined threshold value, from each to be switched Target cell, determine a switching target small area, and carry out cell merge.
Preferably, describedly determine that the process of to be switched Target cell priority described in each is specially:
Size according to RSCP measured value corresponding to Target cell to be switched described in each compares;
Determine that the described to be switched Target cell that maximum RSCP measured value is corresponding is limit priority, and successively priority arrangement is carried out to Target cell to be switched described in each.
Preferably, describedly from each to be switched Target cell, determine that a switching target small area is specially:
Choose the cell signal quality measured values of the highest to be switched Target cell of priority;
Whether the cell signal quality measured values chosen described in judgement is greater than predetermined threshold value, if so, then determines that the to be switched Target cell that described priority is the highest is switching target small area; If not, then choose the cell signal quality measured values of the to be switched Target cell of second priority level, continue to perform determining step, till determining switching target small area.
Preferably, described cell signal quality measured values is signal to noise ratio.
Preferably, described cell signal quality measured values is signal-to-jamming ratio.
Preferably, when described cell signal quality measured values is signal to noise ratio, described predetermined threshold value is between 3.5dB to 5dB; When described cell signal quality measured values is signal-to-jamming ratio, described predetermined threshold value can be set between-1dB to 2dB.
A device for TD-SCDMA system cell merge, comprising:
RSCP acquiring unit, for obtaining the received signal code power RSCP measured value of current area and each adjacent area thereof;
Choose unit, for choose be greater than described current area RSCP measured value adjacent area as to be switched Target cell;
Priority determining unit, for the size according to RSCP measured value corresponding to Target cell to be switched described in each, determines the priority of to be switched Target cell described in each;
Cell signal quality measured values acquiring unit, for obtain determine priority each described in cell signal quality measured values corresponding to be switched Target cell;
Handover evaluation unit, for the magnitude relationship according to cell signal quality measured values corresponding to Target cell to be switched described in each and predetermined threshold value, determines a switching target small area from each to be switched Target cell;
Switch unit, for carrying out cell merge according to described switching target small area.
Preferably, described priority determining unit comprises:
Comparing unit, for comparing the size of RSCP measured value corresponding to Target cell to be switched described in each;
Arrangement units, for determining that the described to be switched Target cell that maximum RSCP measured value is corresponding is limit priority, and carries out priority arrangement to Target cell to be switched described in each successively.
Preferably, described handover evaluation unit comprises:
Priority chooses unit, for choosing the cell signal quality measured values of the highest to be switched Target cell of priority;
Judging unit, for judging whether described cell signal quality measured values is greater than predetermined threshold value, if so, then determines that the to be switched Target cell that described priority is the highest is switching target small area; If not, then return and choose in be switched Target cell that unit never chooses, again choose the cell signal quality measured values of the highest to be switched Target cell of priority, till determining switching target small area.
Preferably, described cell signal quality measured values is signal to noise ratio or signal-to-jamming ratio.
Known via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of method and device of TD-SCDMA system cell merge, the RSCP measured value on frequency adjacent area, place, current area and cell signal quality measured values are judged, thus determines switching target small area.First, determine that the qualified adjacent area of RSCP measured value is to be switched Target cell; Then, the priority of each to be switched Target cell is determined; Recycle the priority determined, cell signal quality measured values (SIR or SNR) corresponding in each to be switched Target cell and threshold value are made comparisons, if cell signal quality measured values is greater than threshold value, then think that this to be switched Target cell quality is better, be applicable to switching; If cell signal quality measured values is less than threshold value, then thinks that this to be switched Target cell is second-rate, be not suitable as switching target small area.Adopting RSCP measured value and cell signal quality measured values to judge by the present invention, whether the adjacent area of current area meets carries out cell merge, reach and occur interference on the frequency of place, community, cause RSCP measured value inaccurate or higher time, utilize the object that cell signal quality measured values switches to avoid community by mistake.
In addition, method of the present invention and device can also avoid community by mistake switching cause switching rear demodulation quality and be deteriorated, cause step-out, make the problem of UE call drop, ensure further and promote UE performance and speech quality.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the schematic diagram carrying out determining switching target small area in prior art;
The method flow diagram a of Fig. 2 a kind of TD-SCDMA system cell merge disclosed in the embodiment of the present invention;
Fig. 3 is method flow diagram b disclosed in the embodiment of the present invention;
Fig. 4 is method flow diagram c disclosed in the embodiment of the present invention;
Fig. 5 be when SNR is cell signal quality measured values in Case001_b in adjacent area 1 SNR PDF figure;
Fig. 6 be when SNR is cell signal quality measured values in Case001_b in adjacent area 1 SNR CDF figure;
The apparatus structure schematic diagram d of Fig. 7 a kind of TD-SCDMA system cell merge disclosed in the embodiment of the present invention;
Fig. 8 is apparatus structure schematic diagram e disclosed in the embodiment of the present invention;
Fig. 9 is apparatus structure schematic diagram f disclosed in the embodiment of the present invention.
Embodiment
For the purpose of quoting and know, the explanation of the technical term hereinafter used, write a Chinese character in simplified form or abridge and be summarized as follows:
TD-SCDMA system: Time Division-Synchronous Code Division Multiple Access, TDS-CDMA system;
PCCPCH:Primary Common Control Physical Channel, Primary Common Control Physical Channel;
Midamble: be the training sequence in TD-SCDMA system physical channel burst structure;
RSSI:Received Signal Strength Indicator, received signal strength indicator;
RSCP:Received Signal Code Power, received signal code power;
ISCP:Interference Signal Code Power, Interference Signal Code Power;
SIR:Signal to Intercell-Interference Ratio, signal-to-jamming ratio;
SNR:Signal to Noise Ratio, signal to noise ratio;
UE:User Equipment, subscriber equipment.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to accompanying drawing 2, a kind of method flow diagram of TD-SCDMA system cell merge disclosed in the embodiment of the present invention, mainly comprises the following steps:
Step S101, obtains the received signal code power RSCP measured value of current area and each adjacent area thereof.
In TD-SCDMA system, because PCCPCH is fixedly carried on time slot TS0 (Timeslot, time slot) 0,1 code channel on, and be the RSCP of PCCPCH for assessment of the measurement item switched, and for the RSCP measured value on the current area at UE place and its each adjacent area, be according to obtaining the channel estimating of Midamble.Namely the RSCP measured value of the adjacent area on the frequency of place, UE persistent district and on this frequency is obtained.
Step 102, chooses RSCP measured value and is greater than the adjacent area of described current area as to be switched Target cell.
When performing step S102, need to choose in each adjacent area to meet as UE switching target small area as to be switched Target cell, in the process chosen, foundation is the size of the RSCP measured value of each adjacent area, and carry out in the process switched in community, then choose RSCP measured value and be greater than the adjacent area of the RSCP measured value of current area, UE place as to be switched Target cell.
Step S103, according to the RSCP measured value size that Target cell to be switched described in each is corresponding, determines the priority of to be switched Target cell described in each.
After execution above-mentioned steps S101 and step S102, obtain qualified to be switched Target cell, then step S103 is performed, for the RSCP measured value size that each qualified to be switched Target cell is corresponding, determine the priority of to be switched Target cell described in each, provide more accurate alternative condition for UE afterwards carries out cell merge.
Step S104, according to the priority of described to be switched Target cell described in each, and the magnitude relationship of the cell signal quality measured values that described in each, to be switched Target cell is corresponding and predetermined threshold value, from each to be switched Target cell, determine a switching target small area.
Step S105, carries out cell merge.
After the priority determining to be switched Target cell, need therefrom to choose and be suitable as the switching target small area that UE carries out cell merge.Therefore, UE is utilized to carry out cell signal quality measured, obtain the cell signal quality measured values determining each to be switched Target cell of priority, then foundation is from height to low priority orders, successively the size of cell signal quality measured values corresponding for be switched Target cell and predetermined threshold value is compared, according to the result compared, choose cell signal quality measured values and be greater than predetermined threshold value, and the highest to be switched Target cell of priority is switching target small area, UE switches in this community by the switching target small area that last foundation is determined, complete cell merge.
By said method disclosed in the embodiment of the present invention, utilize for RSCP measured value and cell signal quality measured values double standards, judge whether the adjacent area of current area meets the condition of carrying out cell merge, namely in appearance interference, cause RSCP measured value inaccurate or higher time, can the cell quality of utilization cell signal quality measured values to the to be switched Target cell determined judge further, therefrom choose and be applicable to switching, and the good to be switched Target cell of cell quality is as target handover cell, then cell merge is carried out, reach the object preventing community from by mistake switching.
It should be noted that, refer to accompanying drawing 3, determine the process of to be switched Target cell priority described in each in the above-described embodiments, specifically comprise the following steps when namely performing step S103:
Step S1031, the size according to RSCP measured value corresponding to Target cell to be switched described in each compares.
Step S1032, determines that the described to be switched Target cell that maximum RSCP measured value is corresponding is limit priority, and carries out priority arrangement to Target cell to be switched described in each successively.
When performing step S1031 and step S1032, first, the RSCP measured value in each to be switched Target cell is compared; Then, determine that the described to be switched Target cell that maximum RSCP measured value is corresponding is limit priority; Finally, sort to little order according to from large, namely the first preservation is the to be switched Target cell that current highest priority is corresponding, and other to be switched Target cells are preserved according to the mode reducing priority successively.
It should be noted that, refer to accompanying drawing 4, from each to be switched Target cell, determine the process of a switching target small area in the above-described embodiments, namely specifically comprising the following steps when performing step S104:
Step S1041, chooses the cell signal quality measured values of the highest to be switched Target cell of priority.
Step S1042, whether the cell signal quality measured values chosen described in judgement is greater than predetermined threshold value, if so, then performs step S1043; If not, then execution step S1041 is returned
Step S1043, then determine that the to be switched Target cell that described priority is the highest is switching target small area.
When performing step S1041 to step S1043, for the priority of the to be switched Target cell that above-mentioned steps is determined, process one by one.First, the cell signal quality measured values of the to be switched Target cell of the limit priority determined after choosing execution step S103, then, this cell signal quality measured values and predetermined threshold value are compared, if the cell signal quality measured values compared current is greater than predetermined threshold value, then think that the quality of the to be switched Target cell that this cell signal quality measured values is corresponding is better, be suitable as the switching target small area of UE, if be less than predetermined threshold value, then think the second-rate of this to be switched Target cell, even if the RSCP measured value of this to be switched Target cell is suitable, also think that this to be switched Target cell is not suitable as the switching target small area of UE, therefore, again choose new to be switched Target cell to compare, namely the cell signal quality measured values of the to be switched Target cell of second priority level is chosen, alternatively, choose the cell signal quality measured values of the highest to be switched Target cell of current priority, continue to perform determining step, till determining switching target small area.Finally perform step S105 again, complete the cell merge of UE.
In embodiment disclosed by the invention, first, to be switched Target cell is determined by performing step S101 to step S102; Then, then perform step S103, determine the priority of each to be switched Target cell, and by it according to from large to little, preserve from height to low order; Then, then perform step S104, the to be switched Target cell determining to be greater than predetermined threshold value is switching target small area; Finally perform step S105, complete the cell merge for UE.Adopting RSCP measured value and cell signal quality measured values to judge by the present invention, whether the adjacent area of current area meets carries out cell merge, in appearance interference, cause RSCP measured value inaccurate or higher when, thus cell signal quality measured values can be utilized reach the object avoiding community by mistake to switch.
In addition, community can also be avoided to miss switching by method disclosed in the above embodiment of the present invention and device and cause switching rear demodulation quality variation, cause step-out, make the problem of UE call drop, ensure further and promote UE performance and speech quality.
It should be noted that, state on the invention in disclosed embodiment, the cell signal quality measured values of each adjacent area got can be signal to noise ratio snr, also can for being signal-to-jamming ratio SIR.Wherein, SNR is that symbol data after utilizing joint-detection carries out estimating to obtain; And SIR utilizes received signal code power RSCP to obtain to the relevant ratio of Interference Signal Code Power ISCP, i.e. SIR=RSCP/ISCP.
Conveniently understand the method disclosed in the present, application is in practice illustrated in this way below:
When SNR is as cell signal quality measured values, predetermined threshold value is 4dB (be the empirical value in practical application about predetermined threshold value, or experiment value, therefore predetermined threshold value can be set between 3.5dB to 5dB).The present invention is not limited in this about the setting of predetermined threshold value.
Refer to table 1:
Wherein, Case001_a:
UE resides in above 19 communities (current RSCP drops to-88dBm) of frequency A, and frequency B Shang 100 community (current RSCP is-81dBm), frequency B Shang 58 community (current RSCP is-67dBm) and frequency C Shang 85 community (current RSCP is-80dBm) are its adjacent area.
The inventive method: first according to the size of RSCP measured value, judge that adjacent area is stronger than Serving cell (community, current UE place), from upper table 1,100 communities, 58 communities and 85 communities are all eligible, then the priority of 100 communities, 58 communities and 85 communities is determined according to the size of RSCP measured value, it can thus be appreciated that 58 native region priorities are the highest, take second place in 85 communities, and 100 native region priorities are minimum.
Table 1
In the present invention, add signal quality and judge, therefore, from most Gao 58 community of priority, whether the SNR measured value comparing its correspondence is greater than predetermined threshold value 4dB.From in table 1, the SNR measured value of 58 communities (adjacent area 2) is greater than 4dB, so meet the condition of handover evaluation, therefore 58 communities are the switching target small areas being suitable as UE, can't cause hydraulic performance decline.
Wherein, Case001_b:
UE resides in above 19 communities (current RSCP drops to-88dBm) of frequency A, frequency B Shang 100 community (current RSCP is-81dBm) and frequency C Shang 85 community (current RSCP is-80dBm) are its adjacent area, and on frequency B, there are unknown 58 communities (current RSCP is-67dBm).
In prior art solutions: according to the size of RSCP measured value in table 1, UE will switch on frequency B Shang 100 community.But owing to there is strong co-channel interference (because adjacent area 2 is not configured to the adjacent area of Serving cell on frequency B, generally UE does not know have this community to exist, so can cause the measured value of adjacent area 1 higher), therefore 100 communities be not suitable as the Target cell of switching.
And utilize method of the present invention: judge according to RSCP and SNR measured value, the process of judgement is identical with Case001_a:
First according to the size of RSCP measured value, judge that whether adjacent area is stronger than Serving cell, from upper table 1,100 communities and 85 communities eligible, then determine the priority of 100 communities and 85 communities according to the size of RSCP measured value, it can thus be appreciated that, 100 native region priorities are the highest, take second place in 85 communities; Then according in the present invention to the judgement of cell signal quality measured values.
Refer to accompanying drawing 5 and accompanying drawing 6, represent the SNR measured value of 100 communities (adjacent area 1), wherein, in accompanying drawing 5 (PDF figure), abscissa is the probability distribution graph that SNR, PDF figure represents SNR; In accompanying drawing 6 (CDF figure), abscissa is SNR, CDF characterizes SNR cumulant, namely the ratio accounting for whole SNR measured value from minimum value (negative infinite) to this frequency all SNR measured value is represented, go up Fig. 5 and Fig. 6 thus can find out, the SNR measured value of 100 communities (adjacent area 1) is less than threshold value 4dB, and from table 1, the SNR measured value of 85 communities (adjacent area 3) is greater than threshold value 4dB.So carry out assessment switching in RSCP and SNR two after, determine that 85 communities are more suitable for the switching target small area as UE, and the probability having more than 98% is switched on 85 communities of frequency C by UE.
Therefore, adopt method disclosed in the embodiment of the present invention, can effectively avoid because the problem that switches of the higher thus community caused of the measured value that causes of co-channel interference by mistake.
When SIR is as cell signal quality, its predetermined threshold value is set as 0dB.(be the empirical value in practical application about predetermined threshold value, or experiment value, therefore predetermined threshold value can be set between-1dB to 2dB).The present invention is not limited in this about the setting of predetermined threshold value.
Refer to table 2:
Wherein, Case002_a:
UE resides in above 19 communities (current RSCP drops to-88dBm) of frequency A, and frequency B Shang 100 community (current RSCP is-81dBm), frequency B Shang 58 community (current RSCP is-72dBm) and frequency C Shang 85 community (current RSCP is-80dBm) are its adjacent area.
Wherein, Case002_b:
UE resides in above 19 communities (current RSCP drops to-88dBm) of frequency A, upper 100 communities of frequency B (current RSCP is-81dBm) and frequency C Shang 85 community (current RSCP is-80dBm) are its adjacent area, and on frequency B, there are unknown 58 communities (current RSCP is-72dBm).Due on frequency B because there is strong co-channel interference, therefore 100 communities are the Target cells being not suitable as switching.
Table 2
No matter be in Case002_a, or in Case002_b, all judge according to RSCP and cell signal quality measured values, cell signal quality measured values is SIR in the present embodiment, and SIR=RSCP/ISCP, corresponding ratio can be known by upper table 2.Due to, other processes are identical with when cell signal quality measured values is SNR, repeat no more here, carry out reference obtain afterwards in Case002_a with said process, and the switching target small area of UE is 58 communities (adjacent areas 2); And the switching target small area of UE is 85 communities (adjacent areas 3) in Case002_b.
A kind of method of TD-SCDMA system cell merge is described in detail in embodiment disclosed in the invention described above, the device of various ways can be adopted to realize for method of the present invention, therefore the invention also discloses a kind of device of TD-SCDMA system cell merge, provide specific embodiment below and be described in detail.
Refer to accompanying drawing 7, a kind of apparatus structure schematic diagram of TD-SCDMA system cell merge disclosed in the embodiment of the present invention, mainly comprises: RSCP acquiring unit 701, choose unit 702, priority determining unit 703, cell signal quality measured values acquiring unit 704, handover evaluation unit 705 and switch unit 706.
RSCP acquiring unit 701, for obtaining the received signal code power RSCP measured value of current area and each adjacent area thereof.
Choose unit 702, for choose be greater than described current area RSCP measured value adjacent area as to be switched Target cell.
Priority determining unit 703, for the size according to RSCP measured value corresponding to Target cell to be switched described in each, determines the priority of to be switched Target cell described in each.
Cell signal quality measured values acquiring unit 704, for obtain determine priority each described in cell signal quality measured values corresponding to be switched Target cell.
Handover evaluation unit 705, for the magnitude relationship according to cell signal quality measured values corresponding to Target cell to be switched described in each and predetermined threshold value, determines a switching target small area from each to be switched Target cell.
Switch unit 706, for carrying out cell merge according to described switching target small area.
It should be noted that, refer to accompanying drawing 8, mainly comprise in priority determining unit 703 disclosed in the invention described above embodiment: comparing unit 7031 and arrangement units 7032.
Comparing unit 7031, for comparing the size of RSCP measured value corresponding to Target cell to be switched described in each.
Arrangement units 7032, for determining that the described to be switched Target cell that maximum RSCP measured value is corresponding is limit priority, and carries out priority arrangement to Target cell to be switched described in each successively.
It should be noted that, refer to accompanying drawing 9, mainly comprise in handover evaluation unit 705 disclosed in the invention described above embodiment: priority chooses unit 7051 and judging unit 7052.
Priority chooses unit 7051, for choosing the cell signal quality measured values of the highest to be switched Target cell of priority.
Judging unit 7052, for judging whether described cell signal quality measured values is greater than predetermined threshold value, if so, then determines that the to be switched Target cell that described priority is the highest is switching target small area; If not, then return and choose in be switched Target cell that unit never chooses, again choose the cell signal quality measured values of the highest to be switched Target cell of priority, till determining switching target small area.
When carrying out cell merge for UE, RSCP acquiring unit 701 in device disclosed in the embodiment of the present invention obtains the current area (i.e. Serving cell) at UE place, and the RSCP measured value of its adjacent area, then the RSCP measured value of adjacent area and the RSCP measured value of current area are compared choosing in unit 702, choose qualified adjacent area as to be switched Target cell, namely choose be greater than current area RSCP measured value adjacent area as to be switched Target cell.
Then, the to be switched Target cell determined is carried out to the determination of priority in priority determining unit 703: first, RSCP measured value size in comparing unit 7031 one by one in more to be switched Target cell, then in arrangement units 7032 according to from large to little mode, determine the priority of each to be switched Target cell, and be arranged in the first to be switched Target cell the highest for priority.
After determining to be switched Target cell priority, in handover evaluation unit 705, successively the cell signal quality measured values in be switched Target cell the highest for priority is compared with predetermined threshold value.Wherein, the cell signal quality measured values of to be switched Target cell is obtained by cell signal quality measured values acquiring unit 704.Through the judgement of handover evaluation unit 705, determine that cell signal quality measured values is greater than the to be switched Target cell of predetermined threshold value as switching target small area.
Finally, by switch unit 706, UE is switched to switching target small area from current area, complete the cell merge of UE.
It should be noted that, described cell signal quality measured values is signal to noise ratio or signal-to-jamming ratio in the above-described embodiments.
In sum:
By method disclosed in the embodiment of the present invention and device, utilize for RSCP measured value and cell signal quality measured values double standards, judge whether the adjacent area of current area meets the condition of carrying out cell merge, namely in appearance interference, cause RSCP measured value inaccurate or higher time, can the cell quality of utilization cell signal quality measured values to the to be switched Target cell determined judge further, therefrom choose and be applicable to switching, and the good to be switched Target cell of cell quality is as target handover cell, then cell merge is carried out, reach the object preventing community from by mistake switching.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a method for TD-SCDMA system cell merge, is characterized in that, comprising:
Obtain the received signal code power RSCP measured value of current area and each adjacent area thereof;
Choose RSCP measured value and be greater than the adjacent area of described current area as to be switched Target cell;
According to the RSCP measured value size that Target cell to be switched described in each is corresponding, determine the priority of to be switched Target cell described in each, for cell merge provides alternative condition;
According to the priority of described to be switched Target cell described in each, and the magnitude relationship of the cell signal quality measured values that described in each, to be switched Target cell is corresponding and predetermined threshold value, from each to be switched Target cell, determine a switching target small area, and carry out cell merge;
Wherein, describedly from each to be switched Target cell, determine that a switching target small area is specially:
Choose the cell signal quality measured values of the highest to be switched Target cell of priority;
Whether the cell signal quality measured values chosen described in judgement is greater than predetermined threshold value, if so, then determines that the to be switched Target cell that described priority is the highest is switching target small area; If not, then choose the cell signal quality measured values of the to be switched Target cell of second priority level, continue to perform determining step, till determining switching target small area.
2. method according to claim 1, is characterized in that, describedly determines that the process of to be switched Target cell priority described in each is specially:
Size according to RSCP measured value corresponding to Target cell to be switched described in each compares;
Determine that the described to be switched Target cell that maximum RSCP measured value is corresponding is limit priority, and successively priority arrangement is carried out to Target cell to be switched described in each.
3. method according to claim 1, is characterized in that, described cell signal quality measured values is signal to noise ratio.
4. method according to claim 1, is characterized in that, described cell signal quality measured values is signal-to-jamming ratio.
5. method according to claim 1, is characterized in that, when described cell signal quality measured values is signal to noise ratio, described predetermined threshold value is between 3.5dB to 5dB; When described cell signal quality measured values is signal-to-jamming ratio, described predetermined threshold value is set between-1dB to 2dB.
6. a device for TD-SCDMA system cell merge, is characterized in that, comprising:
RSCP acquiring unit, for obtaining the received signal code power RSCP measured value of current area and each adjacent area thereof;
Choose unit, for choose be greater than described current area RSCP measured value adjacent area as to be switched Target cell;
Priority determining unit, for the size according to RSCP measured value corresponding to Target cell to be switched described in each, determines the priority of to be switched Target cell described in each, for cell merge provides alternative condition;
Cell signal quality measured values acquiring unit, for obtain determine priority each described in cell signal quality measured values corresponding to be switched Target cell;
Handover evaluation unit, for the magnitude relationship according to cell signal quality measured values corresponding to Target cell to be switched described in each and predetermined threshold value, determines a switching target small area from each to be switched Target cell;
Switch unit, for carrying out cell merge according to described switching target small area;
Wherein, described handover evaluation unit comprises:
Priority chooses unit, for choosing the cell signal quality measured values of the highest to be switched Target cell of priority;
Judging unit, for judging whether described cell signal quality measured values is greater than predetermined threshold value, if so, then determines that the to be switched Target cell that described priority is the highest is switching target small area; If not, then return priority and choose in the to be switched Target cell that unit never chooses, again choose the cell signal quality measured values of the highest to be switched Target cell of priority, till determining switching target small area.
7. device according to claim 6, is characterized in that, described priority determining unit comprises:
Comparing unit, for comparing the size of RSCP measured value corresponding to Target cell to be switched described in each;
Arrangement units, for determining that the described to be switched Target cell that maximum RSCP measured value is corresponding is limit priority, and carries out priority arrangement to Target cell to be switched described in each successively.
8. device according to claim 6, is characterized in that, described cell signal quality measured values is signal to noise ratio or signal-to-jamming ratio.
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| CN201010288062.9A CN102404810B (en) | 2010-09-15 | 2010-09-15 | Method for cell handover in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system and device for cell handover in TD-SCDMA system |
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| BR112014028105B1 (en) | 2012-05-11 | 2022-05-10 | Nokia Technologies Oy | Method, device and system for communicating signal quality measurement result |
| CN103974351B (en) * | 2013-01-24 | 2017-11-28 | 中国移动通信集团北京有限公司 | A kind of switching method and network side equipment |
| CN105376810A (en) * | 2014-08-13 | 2016-03-02 | 中兴通讯股份有限公司 | Method and device for improving cell switching speed |
| CN105517085B (en) * | 2015-12-15 | 2019-06-14 | 中国联合网络通信集团有限公司 | A kind of residence reselecting and device |
| CN106714259A (en) * | 2017-02-28 | 2017-05-24 | 努比亚技术有限公司 | Serving cell switching method and mobile terminal |
| CN108668316B (en) * | 2017-03-31 | 2021-07-06 | 中国移动通信集团湖北有限公司 | Cell switching control method and device |
| CN107249201A (en) * | 2017-05-27 | 2017-10-13 | 珠海市魅族科技有限公司 | Communication control method, terminal, network side equipment and network switching system |
| CN109413701B (en) * | 2017-08-15 | 2020-12-15 | 中国移动通信集团公司 | VoLTE service switching method and system |
| CN109890057A (en) * | 2017-12-06 | 2019-06-14 | 中国电信股份有限公司 | Method for switching network, device, terminal and computer readable storage medium |
| CN110636539B (en) | 2018-06-25 | 2021-07-16 | 维沃移动通信有限公司 | Resource configuration method, mobile terminal, network side device and medium |
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