CN103002554A - Method and device for setting open-loop power control parameters of TD-SCDMA (time division synchronous code division multiple access) network - Google Patents
Method and device for setting open-loop power control parameters of TD-SCDMA (time division synchronous code division multiple access) network Download PDFInfo
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Abstract
The invention discloses a method for setting open-loop power control parameters of the TD-SCDMA (time division synchronous code division multiple access) network. The method includes computing field intensity of an uplink pilot channel UpPCH of user equipment UE when transmitting radio resource control RRC connection requests; comparing the field intensity of the UpPCH with a preset field intensity value, determining the field intensity proportional value of the field intensity of the UpPCH smaller than the preset field intensity value; comparing the field intensity proportional value with a preset proportion value; if judging that the field intensity proportional value is larger than the preset proportional value, determining the scene of the cell where the UE is located as a weak coverage scene; setting the open-loop power control parameters of the TD-SCDMA network and setting the open-loop power control parameters of the TD-SCDMA network of the cell of the weak coverage scene as open-loop power parameters of the preset weak coverage scene.
Description
Technical field
The present invention about the control of the open loop power parameter in the time division SCDMA moving communicating field, is a kind of method to set up and device of open Loop Power control parameter of TD-SCMDA network particularly about moving communicating field concretely.
Background technology
In the TD-SCDMA wireless network, the relatively poor area of wireless interface passband mainly concentrates on the relatively poor zone of wireless coverage.And wireless interface passband and Radio Resource control (Radio Resource Control, RRC) are relevant with RAB (Radio Access Bearer, RAB), and its formula is:
Wireless interface passband=RAB is created as power * RRC connection and is created as power (traffic aided) * 100%
The reason of RRC connection failure has been divided into three classes: Unspecified (undefined), Congestion (congested), NoReply (not response) with reference to 3GPP TS 25.331 agreements simultaneously then according to signaling procedure in the TD-SCDMA network.Existing TD-SCDMA network RRC connection failure reason does not cause that mainly due to responding reason accounting reaches 74.63%, and its reason mainly is because up or descending covering is weak or have interference to cause.
Because wireless interface passband RRC connection is created as power and the open Loop Power control parameter has much relations, but in the prior art, for up, the uplink power control parameter: UpPCH (Uplink Pilot Channel ascending pilot channel) the whole settings of received power (PRXUpPCHdes) the whole network of residential quarter receiver end expectation are set to 30, corresponding to-90dBm, arrange too small for this parameter of weak covering scene, directly cause call completing rate excessively low, in addition, in the prior art other relevant open Loop Power control parameters are not rationally arranged yet.Therefore, because the unification of TD-SCDMA network arranges the open loop power control parameter in the prior art, affect overall network wireless interface passband, also affected user's use impression.
Summary of the invention
The embodiment of the invention provides a kind of open Loop Power control parameter setting method of TD-SCMDA network, and the method comprises:
The ascending pilot channel UpPCH field intensity of counting user equipment UE when sending the radio resource control RRC connection request;
Described UpPCH field intensity and default field intensity value are compared, determine that described UpPCH field intensity is less than the field intensity ratio value of preset value;
The size of more described field intensity ratio value and preset ratio value;
Judge that described field intensity ratio value greater than the preset ratio value, is defined as weak covering scene with UE place cell scenario;
Open Loop Power control parameter to described TD-SCMDA network arranges, open loop power parameter corresponding to weak covering scene that the open Loop Power control parameter of the TD-SCMDA network of the residential quarter of covering scene is set to preset a little less than being defined as.
Simultaneously, the invention also discloses a kind of open Loop Power control parameter setting apparatus of TD-SCMDA network, this device comprises:
The field intensity computing unit is used for calculating the ascending pilot channel UpPCH field intensity of user equipment (UE) when sending the radio resource control RRC connection request;
Field intensity ratio value determining unit is used for described UpPCH field intensity and preset value are compared, and determines that described UpPCH field intensity is less than the field intensity ratio value of preset value;
The scene determining unit judges that described field intensity ratio value greater than the preset ratio value, is defined as weak covering scene with UE place cell scenario;
Parameter set unit, be used for the open Loop Power control parameter of described TD-SCMDA network being arranged open loop power parameter corresponding to weak covering scene that the open Loop Power control parameter of the TD-SCMDA network of the residential quarter of covering scene is set to preset a little less than being defined as.
Technical scheme disclosed by the invention, for the shortcoming that arranges owing to the unification of open Loop Power control relevant parameter in the existing TD-SCDMA network, different scenes according to TD-SCDMA wireless network level of coverage have been proposed initiatively, corresponding open Loop Power control parameter is set, promote the UpPCH Initial Trans of UE, strengthen the number of times of the maximum UpPCH of transmission of open loop power control cycle UE of immediately access, strengthen the number of repetition that UE accesses the open loop power control cycle immediately, strengthen the number of repetition of the RRC CONNECTION REQUEST of UE initiation, promote the wireless interface passband of TD-SCDMA network, finally promote user's use impression.
For above and other purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of a kind of open Loop Power control parameter setting method of the present invention;
Fig. 2 is the flow chart of user equipment (UE) access procedure in the embodiment of the invention;
Fig. 3 is the structured flowchart of a kind of open Loop Power control parameter setting apparatus of the present invention;
Fig. 4 is the structured flowchart of the scene determining unit of open Loop Power control parameter setting apparatus of the present invention;
Fig. 5 is the structured flowchart of the parameter set unit of open Loop Power control parameter setting apparatus of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The invention discloses a kind of open Loop Power control parameter setting method, as shown in Figure 1, the method comprises, step S101 calculates the ascending pilot channel UpPCH field intensity of user equipment (UE) when sending the radio resource control RRC connection request; Step S102 compares UpPCH field intensity and preset value, determines that the UpPCH field intensity is less than the field intensity ratio value of preset value; Step S103 judges that whether the field intensity ratio value is greater than the preset ratio value; Judgement is, execution in step S104, UE place cell scenario is defined as weak covering scene, and execution in step S105 then is defined as open loop power parameter corresponding to weak covering scene that the open Loop Power control parameter of TD-SCMDA network of the residential quarter of weak covering scene is set to preset.
In step S103, judge noly, namely ratio value is less than or equal to the preset ratio value, execution in step S106 then, the TD-SCDMA network of statistics residential quarter, UE place is initiated the switching proportion value that different system is switched to the GSM network; Then execution in step S107 judges that whether the switching proportion value is greater than default switching proportion value; Judgement is execution in step S104; Judge no, be that the switching proportion value is less than or equal to default switching proportion value, execution in step S108, be general covering scene with the scene partitioning of the residential quarter at UE place, and execution in step S109, be defined as open loop power parameter corresponding to general covering scene that the open Loop Power control parameter of TD-SCMDA network of the residential quarter of general covering scene is set to preset.
In the present invention the open Loop Power control parameter of TD-SCMDA network is arranged and comprise: the UpPCH received power that residential quarter receiver section expectation is set according to the cell scenario of determining, number of times at the open loop power control that accesses the at random maximum transmission of UE UpPCH in the cycle, UE accesses the number of repetition in open loop power control cycle at random, and UE initiates the number of repetition of RRC CONECTION REQUEST (trial of Radio Resource control connection).
In the prior art, for up, the uplink power control parameter: the whole settings of UPPCH received power (PRXUpPCHdes) the whole network of residential quarter receiver end expectation are set to 30, corresponding to-90dBm, simultaneously, for other open loop power parameter, namely at the open loop power control of the at random access maximum number of times that sends UpPCH of UE in the cycle, UE accesses the number of repetition in open loop power control cycle at random, and the UE number of repetition of the initiating RRCCONECTION REQUEST rationally setting of also not be correlated with, initiate switching proportion value that different system switch less than the field intensity ratio value of preset value and the TD-SCDMA network of residential quarter, UE place to the GSM network according to the UpPCH field intensity among the present invention, with the scene of the residential quarter at UE place be divided into weak covering scene and general covering scene, arrange according to the open Loop Power control parameter of different cell scenario to the TD-SCMDA network.
Embodiment
As shown in Figure 2, be the flow chart of user equipment (UE) access procedure, after the UE start, receive the downlink pilot frequency channel (Downlink Pilot Channel, DwPCH) of certain residential quarter, receive afterwards the PCCPCH channel; In the system message of PCCPCH channel, read the information such as down initial transmitting power, power control parameters.In access procedure immediately, UE obtains the down initial transmitting power of PCCPCH by system message, and the received signal code power of the PCCPCH that receives in conjunction with UE calculates the Initial Trans that UE sends UpPCH by open loop power control.After UE sends UpPCH, wait for the fast physical layer access channel (Fast Physical Access Channel, FPACH) that the receiving system side sends.Fail to receive FPACH then retransmit UpPCH if UE is overtime.
Wherein, the Initial Trans of the UpPCH of UE is determined by the UPPCH received power (PRXUpPCHdes) of parameter residential quarter receiver end expectation, maximum number of retransmissions is determined by following three parameters: Max SYNC_UL Transmissions, Mmax, N300, and every open Loop Power control parameter interpretation is as follows:
1 in the uplink synchronous process, the transmitting power P of UE on UpPCH
UpPCHAdjust according to formula (1):
I is the number of times that UE sounds out, i=1 ... Mmax.Pwrramp is the power ramp step-length, L
PCCPCHBe the path loss between UE and the Node, UE can calculate path loss according to reference signal by formula (2):
L
PCCPCH＝P
P-CCPCHref-P
P-CCPCH_RSCP (2)
Wherein, P
P-CCPCHrefBe yard power that transmits, P
P-CCPCH_RSCPBe the signal code power that receives, PRXUpPCHdes is the performance number that Node B expectation receives UpPTS in the present embodiment, and by broadcast announcement UE, parameter value: 0dBm～62dBm is converted into actual power and is: foreground value=120+ actual power.The value of TD-SCDMA existing network is-90dBm that corresponding parameter value is 30dBm, from value, corresponding to weak covering scene, can get the Initial Trans that larger value promotes UpPCH, promotes the wireless interface passband.
2. at the number of times (Max SYNC_UL Transmissions) of the open loop power control that accesses the at random maximum transmission of UE UpPCH in the cycle, span: [1,2,4,8], the existing network value differs and is irregular, in order to improve the wireless interface passband, higher value can be set.
3.UE access at random the number of repetition (Mmax) in open loop power control cycle, span: [1～32], the existing network value differs and is irregular, in order to improve wireless interface passband and assurance user's normal use impression, can value be between the 2-10.
4.UE initiate the number of repetition (N300) of RRC CONECTION REQUEST, span: [0～7] in order to improve wireless interface passband and assurance user's normal use impression, can value be between the 3-4.
Below in conjunction with Fig. 1 and embodiment the present invention is described in further details:
UE when sending the RRC connection request, the field intensity of the UpPCH of webmaster side statistics, the field intensity of UE webmaster side statistics when sending the RRC connection request can be obtained by webmaster during implementation, in emerging TD facility network guard system support the collection of this index.Among the present invention, take-90dBm is as the field intensity preset value, and whether be weak covering, surpass 10% if this residential quarter UE works UpPCH field intensity when exhaling less than the ratio of-90dBm if defining cell scenario, and then delimiting this residential quarter is weak covering scene; If this residential quarter UE works UpPCH field intensity when exhaling and is no more than 10% less than the ratio of-90dBm, the step S106 among execution in step Fig. 1 then, judge whether this residential quarter TD-SCDMA surpasses 10% to the ratio that GSM initiates the switching of different system, if this residential quarter TD-SCDMA surpasses 10% to the ratio that GSM initiates the switching of different system, then delimiting this residential quarter is weak covering scene, then execution in step S105 is defined as folding power parameter corresponding to weak covering scene that the open loop power parameter of the residential quarter of weak covering scene is set to preset.Take out 4 relevant parameters of power control in network management system, at the rational parameter value of different scene setting.By promoting the wireless interface passband of weak covering scene, promote the wireless interface passband of the whole network, finally promote the user and use impression.
Judge in the embodiment of the invention that cell scenario is weak covering scene, the divided ring power contorl parameters carries out following setting:
(1) the UPPCH received power (PRXUpPCHdes) of residential quarter receiver end expectation is set to maximum, and namely 62, corresponding actual power is :-58dBm;
(2) the open loop power control of at random access in the cycle the maximum number of times (Max SYNC_UL Transmissions) that sends UpPCH of UE be set to maximum, namely 8;
(3) UE accesses the number of repetition (Mmax) in open loop power control cycle at random, uses perception according to the user, is set to 4;
(4) UE initiates the number of repetition (N300) of RRC CONECTION REQUEST, uses perception according to the user, is set to 4.
If this residential quarter TD-SCDMA is no more than 10% to the ratio that GSM initiates the switching of different system, then delimiting this residential quarter is general covering scene, and execution in step S109, be defined as the general covering scene open loop power parameter that the open Loop Power control parameter of TD-SCDMA network of the residential quarter of general scene is set to preset, in the embodiment of the invention, be judged as general covering scene, then the divided ring power contorl parameters carries out following setting:
(1) the UPPCH received power (PRXUpPCHdes) of residential quarter receiver end expectation is set between 40dBm～50dBm, and corresponding actual power is :-70dBm～-80dBm;
(2, the open loop power control of at random access in the cycle the maximum number of times (Max SYNC_UL Transmissions) that sends UpPCH of UE be set to 4-7;
(3) UE accesses the number of repetition (Mmax) in open loop power control cycle at random, uses perception according to the user, is set to 3;
(4) UE initiates the number of repetition (N300) of RRC CONECTION REQUEST, uses perception according to the user, is set to 3.
This is utilized that the poor reason of wireless interface passband mainly is by the relatively poor characteristics that cause of wireless coverage in the TD-SCDMA network, and by the relevant parameter condition is set the TD-SCDMA network is divided into general covering and weak covering scene, for the corresponding open Loop Power control parameter of different scene setting, namely for 4 relevant parameters in the different scene divided ring power controls: the UPPCH received power (PRXUpPCHdes) of residential quarter receiver end expectation, number of times (Max SYNC_UL Transmissions) at the open loop power control that accesses the at random maximum transmission of UE UpPCH in the cycle, UE accesses the number of repetition (Mmax) in open loop power control cycle at random and the number of repetition (N300) of UE initiation RRC CONECTION REQUEST is carried out difference setting, promotes the whole network wireless interface passband.
This patent invention is for the shortcoming that arranges owing to the unification of open Loop Power control relevant parameter in the existing TD-SCDMA network, different scenes according to TD-SCDMA wireless network level of coverage have been proposed initiatively, corresponding open Loop Power control parameter is set, promote the UpPCH Initial Trans of UE, strengthen the number of times of the maximum UpPCH of transmission of open loop power control cycle UE of immediately access, strengthen the number of repetition that UE accesses the open loop power control cycle immediately, strengthen the number of repetition of the RRC CONNECTION REQUEST of UE initiation, promote the wireless interface passband of TD-SCDMA network, finally promote user's use impression.
As shown in Figure 3, the invention also discloses a kind of open Loop Power control parameter setting apparatus of TD-SCMDA network, this device comprises: field intensity computing unit 301 is used for calculating the ascending pilot channel UpPCH field intensity of user equipment (UE) when sending the radio resource control RRC connection request; Field intensity ratio value determining unit 302 is used for described UpPCH field intensity and preset value are compared, and determines that described UpPCH field intensity is less than the field intensity ratio value of preset value; Scene determining unit 303 judges that described field intensity ratio value greater than the preset ratio value, is defined as weak covering scene with UE place cell scenario; Parameter set unit 304, be used for the open Loop Power control parameter of described TD-SCMDA network being arranged open loop power parameter corresponding to weak covering scene that the open Loop Power control parameter of the TD-SCMDA network of the residential quarter of covering scene is set to preset a little less than being defined as.
As shown in Figure 4, scene determining unit 303 of the present invention comprises: field intensity ratio value comparison module 3031, be used for field intensity ratio value and preset ratio value are compared, the field intensity ratio value is defined as weak covering scene greater than the cell scenario at the UE place of preset ratio value; Switching proportion Data-Statistics module 3032, when determining that for field intensity ratio value comparison module the field intensity ratio value is less than or equal to the preset ratio value, the TD-SCDMA network of statistics residential quarter, UE place is initiated the switching proportion value that different system is switched to the GSM network; Switching proportion value comparison module 3033, be used for switching proportion value and the switching proportion value of presetting are compared, the switching proportion value is defined as weak covering scene greater than the cell scenario at the UE place of default switching proportion value, and the cell scenario that the switching proportion value is less than or equal to the UE place of default switching proportion value is defined as general covering scene.
As shown in Figure 5, parameter set unit 304 of the present invention comprises: power setting module 3041 is used for according to the cell scenario of determining the UpPCH received power that residential quarter receiver section is expected being set; UpPCH number of maximum transmission arranges module 3042, is used for being arranged on the number of times of the maximum UpPCH of transmission of open loop power control cycle UE that accesses at random; The access number of times arranges module 3043, is used for arranging the number of repetition that UE accesses the open loop power control cycle at random; Number of repetition arranges module 3044, is used for arranging the number of repetition that UE initiates RRC CONECTION REQUEST.
Used specific embodiment among the present invention principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the open Loop Power control parameter setting method of a TD-SCMDA network is characterized in that, described method comprises:
The ascending pilot channel UpPCH field intensity of counting user equipment UE when sending the radio resource control RRC connection request;
Described UpPCH field intensity and default field intensity value are compared, determine that described UpPCH field intensity is less than the field intensity ratio value of preset value;
The size of more described field intensity ratio value and preset ratio value;
Judge that described field intensity ratio value greater than the preset ratio value, is defined as weak covering scene with UE place cell scenario;
Open Loop Power control parameter to described TD-SCMDA network arranges, open loop power parameter corresponding to weak covering scene that the open Loop Power control parameter of the TD-SCMDA network of the residential quarter of covering scene is set to preset a little less than being defined as.
2. the method for claim 1 is characterized in that, described method also comprises:
Judge that described ratio value is less than or equal to the preset ratio value, add up the TD-SCDMA network of residential quarter, described UE place and initiate the switching proportion value that different system is switched to the GSM network;
Judge described switching proportion value greater than default switching proportion value, with the weak covering scene that is defined as of the cell scenario at described subscriber equipment place;
Open Loop Power control parameter to described TD-SCMDA network arranges, open loop power parameter corresponding to weak covering scene that the open Loop Power control parameter of the TD-SCMDA network of the residential quarter of covering scene is set to preset a little less than being defined as.
3. method as claimed in claim 2 is characterized in that, described method also comprises:
Judging that described switching proportion value is less than or equal to default switching proportion value, is general covering scene with the scene partitioning of the residential quarter at UE place;
Open Loop Power control parameter to described TD-SCMDA network arranges, and is defined as open loop power parameter corresponding to general covering scene that the open Loop Power control parameter of TD-SCMDA network of the residential quarter of general covering scene is set to preset.
4. method as claimed in claim 3, it is characterized in that, described open Loop Power control parameter to described TD-SCMDA network arranges and comprises: the UpPCH received power that residential quarter receiver section expectation is set according to the cell scenario of determining, number of times at the open loop power control that accesses the at random maximum transmission of UE UpPCH in the cycle, UE accesses the number of repetition in open loop power control cycle at random, and UE initiates the number of repetition of RRC CONECTION REQUEST.
5. the method for claim 1 is characterized in that, described default field intensity value is-90dBm.
6. method as claimed in claim 2 is characterized in that, described switching proportion value is 10%.
7. the open Loop Power control parameter setting apparatus of a TD-SCMDA network is characterized in that, described device comprises:
The field intensity computing unit is used for calculating the ascending pilot channel UpPCH field intensity of user equipment (UE) when sending the radio resource control RRC connection request;
Field intensity ratio value determining unit is used for described UpPCH field intensity and preset value are compared, and determines that described UpPCH field intensity is less than the field intensity ratio value of preset value;
The scene determining unit judges that described field intensity ratio value greater than the preset ratio value, is defined as weak covering scene with UE place cell scenario;
Parameter set unit, be used for the open Loop Power control parameter of described TD-SCMDA network being arranged open loop power parameter corresponding to weak covering scene that the open Loop Power control parameter of the TD-SCMDA network of the residential quarter of covering scene is set to preset a little less than being defined as.
8. device as claimed in claim 7 is characterized in that, described scene determining unit comprises:
Field intensity ratio value comparison module is used for described field intensity ratio value and preset ratio value are compared, and described field intensity ratio value is defined as weak covering scene greater than the cell scenario at the UE place of preset ratio value;
Switching proportion Data-Statistics module when determining that for described field intensity ratio value comparison module described field intensity ratio value is less than or equal to the preset ratio value, is added up the TD-SCDMA network of residential quarter, described UE place and is initiated the switching proportion value that different system is switched to the GSM network;
Switching proportion value comparison module, be used for described switching proportion value and the switching proportion value of presetting are compared, described switching proportion value is defined as weak covering scene greater than the cell scenario at the UE place of default switching proportion value, and the cell scenario that described switching proportion value is less than or equal to the UE place of default switching proportion value is defined as general covering scene.
9. device as claimed in claim 7 is characterized in that, described parameter set unit comprises:
The power setting module is used for according to the cell scenario of determining the UpPCH received power that residential quarter receiver section is expected being set;
UpPCH number of maximum transmission arranges module, is used for being arranged on the number of times of the maximum UpPCH of transmission of open loop power control cycle UE that accesses at random;
The access number of times arranges module, is used for arranging the number of repetition that UE accesses the open loop power control cycle at random;
Number of repetition arranges module, is used for arranging the number of repetition that UE initiates RRC CONECTION REQUEST.
10. install as claimed in claim 8, it is characterized in that described parameter set unit also is used for open loop power parameter corresponding to general covering scene that the open Loop Power control parameter to the TD-SCMDA network of the residential quarter that is defined as general covering scene is set to preset.
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| CN112087784A (en) * | 2019-06-13 | 2020-12-15 | 中国移动通信集团浙江有限公司 | Pilot frequency switching method and device based on uplink coverage |
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