CN101166349A - System switching method and device - Google Patents
System switching method and device Download PDFInfo
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- CN101166349A CN101166349A CNA2006101370637A CN200610137063A CN101166349A CN 101166349 A CN101166349 A CN 101166349A CN A2006101370637 A CNA2006101370637 A CN A2006101370637A CN 200610137063 A CN200610137063 A CN 200610137063A CN 101166349 A CN101166349 A CN 101166349A
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Abstract
The system switching method includes steps: S202, when user equipment (UE) switches to target sector from source sector, radio network controller (RNC) initiates the switching measurement to UE, and receives the measured result from UE in order to guide UE to carry out switching; S204,based on measured result and actual emissive power of the target sector, RNC calculates the route loss between UE and the target sector; mapping the route loss to down going initial emissive power control table to obtain initial emissive power (IEP) for the target sector, and to send the switching command including information of IEP to the target sector; S206,based on the switching command, to target sector sends information to UE, and UE accomplishes switching based on the information. The invention makes target sector use proper power to send information to UE.
Description
Technical field
The present invention relates to the communications field, relate more specifically to a kind of system switching method and device.
Background technology
At TD SDMA (Time Division Synchronization Code-Division Multiple Access, abbreviation TD-SCDMA) in the handoff procedure of system, as subscriber equipment (User Equipment, be called for short UE) when the cell-of-origin switches to Target cell, the down initial transmitting power of Target cell is difficult to determine, especially in handoff procedure, UE receives only the Target cell downstream signal at first, Target cell can't be determined its Initial Trans, in this case, if Target cell covers power with maximum and sends, can cause interference to other UE and other sub-districts, secondly, also can influence the power of Target cell with other down channels in the time slot.
Concrete, in the handoff procedure of TD-SCDMA system, when UE switches when Target cell switches from the cell-of-origin, radio network controller (Radio NetworkController, be called for short RNC) according to signal interference ratio (the Signal InterferenceRatio of UE, abbreviation SIR) value judges whether UE needs to carry out handover measurement, when sir value satisfies measuring condition, UE measures according to RNC instruction and measurement result is reported RNC, RNC judges whether reported result satisfies switching condition, if satisfy, then initiates the physical channel reprovision, guiding UE switches to Target cell, and its flow process as shown in Figure 1.
Have some problems in the open Loop Power control flow process of Fig. 1, promptly when RNC initiation physical channel reprovision, and the notification target sub-district should send with great down transmitting power when UE sends information.If Target cell covers power with maximum and sends, can cause interference to other UE and other sub-districts, secondly, also can influence the power of Target cell with other down channels in the time slot.If the Target cell transmitting power is too small, UE possibly can't correctly receive, and causes handoff failure.
Summary of the invention
The present invention is intended to solve above-mentioned one or more problem, has proposed a kind of system switching method and device.
According to an aspect of the present invention, a kind of system switching method has been proposed.This system switching method comprises: S202, when subscriber equipment from the cell-of-origin when Target cell switches, radio network controller is initiated handover measurement and is received measurement result from subscriber equipment to subscriber equipment, the guiding subscriber equipment switches; S204, radio network controller is according to the actual emission power of measurement result and Target cell, calculate the path loss between subscriber equipment and the Target cell, by path loss being mapped to the Initial Trans that the down initial transmitting power control table obtains Target cell, and send the switching command that comprises Initial Trans information to Target cell; And S206, Target cell sends information according to switching command to subscriber equipment, and subscriber equipment is finished switching according to information.
In the said system changing method, step S202 may further comprise the steps: S2022, and radio network controller is initiated handover measurement by the node of cell-of-origin to subscriber equipment; S2024, subscriber equipment carries out handover measurement, and the result of handover measurement is reported radio network controller; And S2026, radio network controller is according to switching condition, and the guiding subscriber equipment switches.
In the said system changing method, the down initial transmitting power control table comprises: with respect to the down transmitting power offset information of Primary Common Control Physical Channel and the path loss information of radio network controller calculating.
In the said system changing method, further comprise signal interference ratio constraints in the down initial transmitting power control table.
According to a further aspect in the invention, a kind of system switching device shifter has been proposed.This device comprises: switching and booting module 502, be used for when subscriber equipment from the cell-of-origin when Target cell switches, make radio network controller initiate handover measurement and receive measurement result from subscriber equipment to subscriber equipment, the guiding subscriber equipment switches; Power control module 504, be used to make the actual emission power of radio network controller according to measurement result and Target cell, calculate the path loss between subscriber equipment and the Target cell, by path loss being mapped to the Initial Trans that the down initial transmitting power control table obtains Target cell, and send the switching command that comprises Initial Trans information to Target cell; And switch and to finish module 506, be used to make Target cell to send information to subscriber equipment, and make subscriber equipment finish switching according to information according to switching command.
Switching and booting module in the said system switching device shifter comprises: handover measurement is initiated submodule 5022, and the node that is used to make radio network controller pass through the cell-of-origin is initiated handover measurement to subscriber equipment; Handover measurement implementation sub-module 5024 is used to make subscriber equipment to carry out handover measurement, and the result of handover measurement is reported radio network controller; And switching and booting submodule 5026, be used to make radio network controller according to switching condition, the guiding subscriber equipment switches.
In the power control module in the said system switching device shifter, the down initial transmitting power control table comprises: with respect to the down transmitting power offset information of Primary Common Control Physical Channel and the described path loss information of described radio network controller root calculating.
In the said system switching device shifter, the down initial transmitting power control table further comprises signal interference ratio constraints.
By the present invention, can make Target cell send information to subscriber equipment with suitable power, thereby can guarantee that subscriber equipment correctly receives information, can not cause too much influence again to other subscriber equipmenies and other sub-districts, simultaneously, can not cause too big influence with the power of other channels in the time slot to Target cell yet.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram that the TD-SCDMA switching flow in the correlation technique is shown;
Fig. 2 is the flow chart that illustrates according to system switching method of the present invention;
Fig. 3 a is the particular flow sheet that illustrates according to the step S202 of system switching method of the present invention;
Fig. 3 b is the particular flow sheet that illustrates according to the step S204 of system switching method of the present invention;
Fig. 4 illustrates the schematic diagram according to TD-SCDMA of the present invention system switching flow; And
Fig. 5 is the block diagram that illustrates according to system of the present invention switching device shifter.
Embodiment
Below with reference to accompanying drawing, describe specific embodiments of the invention in detail.
In the method for controlling downlink power in the system switching method that the present invention proposes, the measurement result that RNC reports according to UE, calculate the path loss of UE present position, this circuit loss value is mapped in the power control table, the method that employing is tabled look-up is on the basis of Primary Common Control Physical Channel (Primary Common Control Physical Channel is called for short PCCPCH) transmitting power, adjust the down initial transmitting power of corresponding Target cell, carry out downlink power control.
With reference to shown in Figure 2, illustrate according to system switching method of the present invention.This system switching method comprises: S202, when subscriber equipment from the cell-of-origin when Target cell switches, radio network controller is initiated handover measurement and is received measurement result from subscriber equipment to subscriber equipment, the guiding subscriber equipment switches; S204, radio network controller is according to the actual emission power of measurement result and Target cell, calculate the path loss between subscriber equipment and the Target cell, by path loss being mapped to the Initial Trans that the down initial transmitting power control table obtains Target cell, and send the switching command that comprises Initial Trans information to Target cell; And S206, Target cell sends information according to switching command to subscriber equipment, and subscriber equipment is finished switching according to information.
Wherein, step S202 may further comprise the steps (shown in Fig. 3 a): S2022, and radio network controller is initiated handover measurement by the node of cell-of-origin to subscriber equipment; S2024, subscriber equipment carries out handover measurement, and the result of handover measurement is reported radio network controller; And S2026, radio network controller is according to switching condition, and the guiding subscriber equipment switches.
Wherein, step S204 is the process that is used to carry out descending power control.This process specifically comprises (shown in Fig. 3 b): S2042, and radio network controller calculates the path loss between subscriber equipment and the Target cell; S2044, radio network controller is mapped to path loss in the descending power control table, obtains corresponding Initial Trans; S2046, radio network controller send the switching command that comprises Initial Trans information to Target cell.
Wherein, the down initial transmitting power control table comprises: with respect to the down transmitting power offset information of Primary Common Control Physical Channel and the path loss information of radio network controller calculating.The down initial transmitting power control table may further include signal interference ratio constraints.
Particularly, the Poewr control method of the system switching method of Ti Chuing in this application, the measurement result that to be RNC report according to UE and the actual emission power of Target cell calculate descending path loss, and descending circuit loss value is mapped in the corresponding down transmitting power control table.
Wherein, the down transmitting power control table is as follows:
Table 1
| Rank | Down transmitting power skew (dB) with respect to PCCPCH | UE and the path loss between Target cell (dB) that RNC calculates according to the measurement result that UE reports |
| 1 grade | X1 | Y1 |
| 2 grades | X2 | Y2 |
| … | … | … |
| The N level | Xn | Yn |
Table 1 is a mapping relations signal table between Initial Trans and the path loss, wherein the path loss that calculates has been carried out classification, every grade of corresponding different respectively down initial transmitting power.In actual use, because the error of path loss, so will calculate the supplementary constraints condition of SIR as mapping relations between above-mentioned transmitting power and the path loss, if SIR, thinks then that the path loss that calculates is believable greater than thresholding.After introducing SIR, improved the reliability that down transmitting power is adjusted.In table 2, increased this constraints.
Table 2
| Rank | Down transmitting power skew (dB) with respect to PCCPCH | UE and the path loss between Target cell (dB) that RNC calculates according to the measurement result that UE reports | SIR constraints |
| 1 grade | X1 | Y1 | Whether SIR surpasses thresholding |
| 2 grades | X2 | Y2 | Whether SIR surpasses thresholding |
| … | … | … | |
| The N level | Xn | Yn | Whether SIR surpasses thresholding |
Table 2 can carry out refinement according to different situations, and the table 3 among the embodiment is thinner divisions.
| Rank | Down transmitting power skew (dB) with respect to PCCPCH | UE and the path loss between Target cell (dB) that RNC calculates according to the measurement result that UE reports | SIR constraints (establishing thresholding is 9dB) |
| 1 | X＝-4 | Y＞120 | Whether SIR surpasses thresholding, if do not have, then X is invalid, and power adjustment skew is 0 |
| 2 | X＝-6 | 120＞＝Y＞110 | Whether SIR surpasses thresholding, if do not have, then X is invalid, and power adjustment skew is 0 |
| 3 | X＝-8 | 110＞＝Y | Whether SIR surpasses thresholding, if do not have, then X is invalid, and power adjustment skew is 0 |
With reference to figure 4, the concrete implementation step according to system switching method of the present invention is described:
Step 1, RNC initiates handover measurement through cell-of-origin Node B to UE, as (1) among Fig. 4, (2);
Step 2, UE carries out handover measurement, as (3) among Fig. 4;
Step 3, UE reports RNC with measurement result through Node B, as (4) (5) among Fig. 4;
Step 4, RNC judges whether to satisfy switching condition, as (6) among Fig. 4;
Step 5 satisfies switching condition, and guiding UE switches, as (7) among Fig. 4, (8);
Step 6, UE reads the down channel of cell-of-origin, prepares to switch (physical channel reprovision), as (9) among Fig. 4;
Step 7, RNC calculates path loss between UE and Target cell by UE reporting measurement result, as (10) among Fig. 4;
Step 8, RNC tables look-up 3 according to path loss, obtains corresponding Target cell Initial Trans, as (11) among Fig. 4;
Step 9, RNC sends hand off signaling to Target cell, comprises the configuration of Target cell down initial transmitting power, and as (12) among Fig. 4, generally speaking, this process is carried out after step 5, step 6, step 7, step 8;
Step 10, Target cell send information to UE, as (13) among Fig. 4 according to RNC downlink signaling and Initial Trans;
Step 11, UE reads the downlink information of Target cell.
With reference to figure 5, the switching device shifter according to system of the present invention is described.This system's switching device shifter.This device comprises: switching and booting module 502, be used for when subscriber equipment from the cell-of-origin when Target cell switches, make radio network controller initiate handover measurement and receive measurement result from subscriber equipment to subscriber equipment, the guiding subscriber equipment switches; Power control module 504, be used to make the actual emission power of radio network controller according to measurement result and Target cell, calculate the path loss between subscriber equipment and the Target cell, by path loss being mapped to the Initial Trans that the down initial transmitting power control table obtains Target cell, and send the switching command that comprises Initial Trans information to Target cell; And switch and to finish module 506, be used to make Target cell to send information to subscriber equipment, and make subscriber equipment finish switching according to information according to switching command.
Wherein, the switching and booting module comprises: handover measurement is initiated submodule 5022, and the node that is used to make radio network controller pass through the cell-of-origin is initiated handover measurement to subscriber equipment; Handover measurement implementation sub-module 5024 is used to make subscriber equipment to carry out handover measurement, and the result of handover measurement is reported radio network controller; And switching and booting submodule 5026, be used to make radio network controller according to switching condition, the guiding subscriber equipment switches.
Wherein, power control module is the device that is used for descending power control, and it comprises: path loss computing module 5042 is positioned at Wi-Fi controller side, be used for to switch to from the cell-of-origin under the situation of Target cell, calculate the path loss between subscriber equipment and the Target cell at subscriber equipment; Power acquisition module 5044 is positioned at the radio network controller side, is used for path loss is mapped to the descending power control table, obtains corresponding Initial Trans; Switching command sending module 5046 is positioned at the radio network controller side, is used for sending the switching command that comprises Initial Trans information to Target cell.
Wherein, the down initial transmitting power control table comprises: with respect to the down transmitting power offset information of Primary Common Control Physical Channel and the described path loss information of described radio network controller root calculating.The down initial transmitting power control table may further include signal interference ratio constraints.
By the present invention, can make Target cell send information to subscriber equipment with suitable power, thereby can guarantee that subscriber equipment correctly receives information, can not cause too much influence again to other subscriber equipmenies and other sub-districts, simultaneously, can not cause too big influence with the power of other channels in the time slot to Target cell yet.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. system switching method is characterized in that comprising:
S202, when subscriber equipment from the cell-of-origin when Target cell switches, radio network controller is initiated handover measurement and is received measurement result from subscriber equipment to subscriber equipment, guides described subscriber equipment to switch;
S204, described radio network controller is according to the actual emission power of described measurement result and described Target cell, calculate the path loss between described subscriber equipment and the described Target cell, by described path loss is mapped to the Initial Trans that the down initial transmitting power control table obtains described Target cell, and send the switching command that comprises described Initial Trans information to described Target cell; And
S206, described Target cell sends information according to described switching command to described subscriber equipment, and described subscriber equipment is finished switching according to described information.
2. system switching method according to claim 1 is characterized in that, described step S202 may further comprise the steps:
S2022, described radio network controller is initiated described handover measurement by the node of described cell-of-origin to described subscriber equipment;
S2024, described subscriber equipment carries out described handover measurement, and the result of described handover measurement is reported described radio network controller; And
S2026, described radio network controller guide described subscriber equipment to switch according to switching condition.
3. system switching method according to claim 1, it is characterized in that described down initial transmitting power control table comprises: with respect to the down transmitting power offset information of Primary Common Control Physical Channel and the described path loss information of described radio network controller root calculating.
4. system switching method according to claim 3 is characterized in that, further comprises signal interference ratio constraints in the described down initial transmitting power control table.
5. system's switching device shifter is characterized in that comprising:
The switching and booting module, be used for when subscriber equipment from the cell-of-origin when Target cell switches, make radio network controller initiate handover measurement and receive measurement result from described subscriber equipment to described subscriber equipment, guide described subscriber equipment to switch;
Power control module, be used to make the actual emission power of described radio network controller according to described measurement result and described Target cell, calculate the path loss between described subscriber equipment and the described Target cell, by described path loss is mapped to the Initial Trans that the down initial transmitting power control table obtains described Target cell, and send the switching command that comprises described Initial Trans information to described Target cell; And
Switch and finish module, be used to make described Target cell to send information to described subscriber equipment, and make described subscriber equipment finish switching according to described information according to described switching command.
6. system according to claim 5 switching device shifter is characterized in that, described switching and booting module comprises:
Handover measurement is initiated submodule, is used to make described radio network controller to initiate described handover measurement by the node of described cell-of-origin to described subscriber equipment;
The handover measurement implementation sub-module is used to make described subscriber equipment to carry out described handover measurement, and the result of described handover measurement is reported described radio network controller; And
The switching and booting submodule is used to make described radio network controller according to switching condition, guides described subscriber equipment to switch.
7. system according to claim 5 switching device shifter, it is characterized in that, in described power control module, described down initial transmitting power control table comprises: with respect to the down transmitting power offset information of Primary Common Control Physical Channel and the described path loss information of described radio network controller root calculating.
8. system according to claim 7 switching device shifter is characterized in that, described down initial transmitting power control table further comprises signal interference ratio constraints.
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| CNA2006101370637A CN101166349A (en) | 2006-10-19 | 2006-10-19 | System switching method and device |
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|---|---|---|---|
| CNA2006101370637A CN101166349A (en) | 2006-10-19 | 2006-10-19 | System switching method and device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010009674A1 (en) * | 2008-07-22 | 2010-01-28 | 大唐移动通信设备有限公司 | Method, system and equipment for measuring path loss |
| WO2010145442A1 (en) * | 2009-06-30 | 2010-12-23 | 中兴通讯股份有限公司 | Method for determining initial transmission power and base station |
| WO2011060741A1 (en) * | 2009-11-20 | 2011-05-26 | 华为技术有限公司 | Method for obtaining uplink transmission power control parameters |
| CN103139886A (en) * | 2011-12-05 | 2013-06-05 | 中兴通讯股份有限公司 | Method for controlling transmitted power and base station controller |
| CN105491624A (en) * | 2014-09-17 | 2016-04-13 | 成都鼎桥通信技术有限公司 | Method for switching between uplink carriers in uplink carrier aggregation and base station |
| CN105578520A (en) * | 2014-10-08 | 2016-05-11 | 展讯通信（上海）有限公司 | Cell handover processing system, cell handover processing method and mobile terminal |
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2006
- 2006-10-19 CN CNA2006101370637A patent/CN101166349A/en not_active Withdrawn
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010009674A1 (en) * | 2008-07-22 | 2010-01-28 | 大唐移动通信设备有限公司 | Method, system and equipment for measuring path loss |
| WO2010145442A1 (en) * | 2009-06-30 | 2010-12-23 | 中兴通讯股份有限公司 | Method for determining initial transmission power and base station |
| US8843172B2 (en) | 2009-06-30 | 2014-09-23 | Zte Corporation | Method and base station for determining an initial transmission power |
| WO2011060741A1 (en) * | 2009-11-20 | 2011-05-26 | 华为技术有限公司 | Method for obtaining uplink transmission power control parameters |
| CN102076062B (en) * | 2009-11-20 | 2015-03-11 | 华为技术有限公司 | Uplink transmit power control parameter acquisition method, eNodeB and user equipment |
| US9042926B2 (en) | 2009-11-20 | 2015-05-26 | Huawei Technologies Co., Ltd. | Method for obtaining uplink transmit power control parameter, base station, and user equipment |
| CN103139886A (en) * | 2011-12-05 | 2013-06-05 | 中兴通讯股份有限公司 | Method for controlling transmitted power and base station controller |
| CN103139886B (en) * | 2011-12-05 | 2018-06-08 | 中兴通讯股份有限公司 | A kind of method and base station controller for controlling transmission power |
| CN105491624A (en) * | 2014-09-17 | 2016-04-13 | 成都鼎桥通信技术有限公司 | Method for switching between uplink carriers in uplink carrier aggregation and base station |
| CN105491624B (en) * | 2014-09-17 | 2019-01-15 | 成都鼎桥通信技术有限公司 | Switching method and base station in up-link carrier polymerization between up-link carrier |
| CN105578520A (en) * | 2014-10-08 | 2016-05-11 | 展讯通信（上海）有限公司 | Cell handover processing system, cell handover processing method and mobile terminal |
| CN105578520B (en) * | 2014-10-08 | 2019-04-26 | 展讯通信（上海）有限公司 | A kind of cell switching processing system and method and mobile terminal |
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