CN1731886A - Method for determining initial access power after mobile station switching - Google Patents
Method for determining initial access power after mobile station switching Download PDFInfo
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- CN1731886A CN1731886A CNA2004100700448A CN200410070044A CN1731886A CN 1731886 A CN1731886 A CN 1731886A CN A2004100700448 A CNA2004100700448 A CN A2004100700448A CN 200410070044 A CN200410070044 A CN 200410070044A CN 1731886 A CN1731886 A CN 1731886A
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- travelling carriage
- target cell
- power
- initial access
- base station
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Abstract
This invention relates to a method for determining initial switch-in power after switching mobile station, which comprises the following steps: a, judging the source area base station device, deciding which is the aim area, then calculating the initial switch-in power when mobile station is switched in area, and starting switch course; b, preparing wireless resource in aim area, the source area device sending the initial switch-in power needed by mobile station to the mobile station to switch in to the aim area. The invention can realize in most emitter power the mobile station switches in aim area in the situation of worse net signal, and in the better situation, mobile station dynamically adjusts the initial power to reduce interference among the wireless signals, and increases the quality of wireless communication.
Description
Technical field
The present invention relates to the handoff technique of mobile communication system, specially refer to a kind of method of definite initial access power after mobile station switching.
Background technology
In mobile communication system, signal between travelling carriage and the base station equipment transmits by Radio Link, therefore, between the travelling carriage, between the base station equipment and the wireless signal between travelling carriage and the base station equipment produce the phase mutual interference possibly, these interference will reduce the quality of radio communication.For this reason, in the communication process of travelling carriage and base station equipment, travelling carriage and base station equipment need dynamically be adjusted the transmitting power of its wireless signal according to the network signal coverage condition, and this dynamic adjustment to transmitting power is also referred to as power control.The purpose of power control is exactly not need to launch under the situation that maximum transmitting power just can reach transmission quality preferably in travelling carriage or base station equipment, reduces transmitting power, thereby reduces whole interference of netting, reduce power consumption.
Because Radio Link is divided into the uplink and downlink both direction, one preferably mobile communication system should make the power of the up received signal of base station equipment in the area of coverage and the power of travelling carriage down receiving signal reach balance.Otherwise, if the intensity of up received signal is greater than the intensity of down receiving signal, the coverage that will cause upward signal is greater than downstream signal, be cell edge downstream signal intensity a little less than, like this, the more weak downstream signal in this sub-district is flooded by the strong downstream signal of other sub-districts easily, causes speech quality relatively poor; And if the intensity of down receiving signal is greater than the intensity of up received signal, the coverage that is downstream signal is greater than upward signal, then travelling carriage will reside in the zone that this strong signal covers, but since the upward signal in this zone a little less than, also will cause speech quality relatively poor.Therefore, in travelling carriage and process that base station equipment is communicated by letter, guarantee the power-balance of uplink and downlink received signal as much as possible.This uplink and downlink received signal power balance principle also is the basic principle that mobile communication system network is optimized.
On the other hand, in mobile communication system, in order to realize the covering that the mobile subscriber is called out and to continue, optimize the transmission quality of call transfer quality and network integral body, adjust the traffic loads of network, improve network performance, mobile communication system must switch to another sub-district from a sub-district by supports mobile.
A typical handoff procedure mainly comprises following basic step:
The speech quality of entrained Serving cell and the downstream signal intensity of neighbor cell in the handover measurement message that the cell-of-origin at a, travelling carriage place reports according to travelling carriage through switch decision, are determined the Target cell that travelling carriage will switch to;
B, source cell base station equipment send handoff request message to Target cell;
After c, Target cell are received handoff request message, prepare the Radio Resource that travelling carriage switches to be needed when inserting, and reply response message to the cell-of-origin;
After response message is received in d, cell-of-origin, send switching command message, and in switching command message, carry the initial access power value that Target cell expectation travelling carriage inserts to travelling carriage;
E, travelling carriage can as the Initial Trans that inserts Target cell, utilize the Radio Resource of Target cell with this performance number, insert Target cell.
In the step e of above-mentioned existing mobile communications system handoff procedure, travelling carriage normally inserts Target cell with the transmitting power of maximum.And, after travelling carriage inserts Target cell, mobile communication system is adjusted the transmitting power of travelling carriage and target cell base station equipment according to the radio communication quality starting power control procedure between travelling carriage and the base station equipment, reduces the purpose that whole net disturbs thereby reach.
But, under many circumstances, especially cover area preferably at network signal, travelling carriage need just can not insert Target cell with the transmitting power of maximum, if but in access procedure, travelling carriage still inserts with the power of maximum, the interference that will increase whole network wireless signal, thereby the quality of reduction radio communication.
And, owing to control to travelling carriage with also for some time the delay of suitable power emission wireless signal from beginning power, like this, when power control is not finished, travelling carriage will be all the time with power emission wireless signal bigger than normal, so, not only just cause interference, also can cause the power consumption of travelling carriage bigger whole net signal.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the method that a kind of definite travelling carriage switches the back access power, the access power in the time of can adjusting travelling carriage access Target cell reduces the interference between the wireless signal, reduces the power consumption of travelling carriage simultaneously.
The invention discloses a kind of method of definite initial access power after mobile station switching, be provided with and preserve the up received signal power that the neighbor cell expectation receives in the source cell base station equipment of this method under current mobile station, described method is specially:
A, carry out switch decision at source cell base station equipment, determine Target cell that travelling carriage will switch to after, source cell base station calculation of equipments travelling carriage inserts the required initial access power of Target cell, and starts handoff procedure;
B, after Target cell is ready to Radio Resource, source cell base station equipment inserts the required initial access power of Target cell with the travelling carriage that calculates and sends to travelling carriage, travelling carriage inserts Target cell with the initial access power that receives.
Wherein, the up received signal power that receives of the current down receiving signal power of the described travelling carriage of the step a Target cell that to insert the required initial access power of Target cell be source cell base station equipment reports according to travelling carriage, the Target cell expectation that sets in advance and the maximum transmission power of travelling carriage calculate.
Aforementioned calculation is specially:
If the current down receiving signal power of the Target cell that travelling carriage reports is less than or equal to the up received signal power that the Target cell expectation receives, then the required initial access power of travelling carriage access Target cell is the maximum transmission power of travelling carriage;
If the up received signal power that the current down receiving signal power of the Target cell that travelling carriage reports receives greater than the Target cell expectation, then to insert the required initial access power of Target cell be the poor of the maximum transmission power of the travelling carriage up received signal power that deducts the current down receiving signal power of Target cell that travelling carriage reports and Target cell expectation reception to travelling carriage.
In addition, the described source cell base station equipment that is sent as of step b inserts the required initial access power of Target cell by switching command with travelling carriage and sends to travelling carriage.
This shows, use method of the present invention and can obtain following beneficial effect:
1, cover under the relatively poor situation at network signal, travelling carriage inserts Target cell with the transmitting power of maximum, guarantees successfully to realize handoff procedure as far as possible;
2, under network signal covers preferably situation, travelling carriage is dynamically adjusted the initial access power that inserts Target cell, when guaranteeing successfully to realize handoff procedure, reduces the transmitting power when inserting as far as possible, thereby reduce the interference between the wireless signal, improve the quality of radio communication;
3, the method for using dynamic adjustment travelling carriage initial access power of the present invention has also reduced the power control process of the mobile communication system after travelling carriage switches in the prior art, make in frequent handoff procedure, the fluctuation that the transmitting power of travelling carriage can be broken, thus the power consumption of travelling carriage reduced.
Description of drawings
Fig. 1 has shown the described travelling carriage handoff procedure of a preferred embodiment of the invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and specific embodiment.
Fig. 1 has shown the described travelling carriage handoff procedure of a preferred embodiment of the invention.As can be seen from Figure 1, the handoff procedure of using definite initial access power after mobile station switching method of the present invention may further comprise the steps:
Step 101: source cell base station equipment carries out switch decision according to the handover measurement report data that travelling carriage reports, and determines the Target cell that travelling carriage will switch to, and reads the up received signal power that this Target cell expectation receives;
Wherein, the base station equipment of each sub-district in the mobile communication system is all preserved the up received signal power of the neighbor cell expectation reception that sets in advance, and the up received signal power that this expectation receives is meant: the received power value that can guarantee the correct receiving mobile upward signal of this cell base station equipment substantially.This up received signal power rule of thumb is worth setting by mobile communication system, and can adjust according to the message accounting data in the running of mobile communication system.
Step 102: down receiving signal power, the transmitting power of travelling carriage maximum and the up received signal power that the Target cell expectation receives that the Target cell that the base station equipment of cell-of-origin reports according to travelling carriage is current, the initial access power when the calculating travelling carriage is linked into Target cell;
In this step, according to uplink and downlink received signal power balance principle, travelling carriage reports the current down receiving signal power of Target cell of source cell base station equipment, when inserting Target cell with travelling carriage with maximum transmission power, the up received signal power that this target cell base station equipment receives is suitable substantially.Therefore, the power of the Target cell down receiving signal that the base station equipment of cell-of-origin can report by travelling carriage relatively and the up received signal power that the Target cell expectation receives just can be judged the coverage condition of network signal between travelling carriage and the Target cell basically.
The method of the initial access power value when in a preferred embodiment of the invention, the calculating travelling carriage is linked into Target cell is specific as follows:
During up received signal power that the current down receiving signal power of the Target cell that reports when travelling carriage receives smaller or equal to the Target cell expectation, it is relatively poor to think that network signal covers, and the maximum transmission power that the travelling carriage initial access power is a travelling carriage is set;
During the up reception number of connecing power that the power of the down receiving signal that the Target cell that reports when travelling carriage is current receives greater than the Target cell expectation, think that network signal covers better, the maximum transmission power that the travelling carriage initial access power is set is travelling carriage deducts up received signal power poor of the current down receiving signal power of Target cell that travelling carriage reports and Target cell expectation reception.
Step 103: the initial access power when source cell base station equipment is kept at travelling carriage that step 102 calculates and inserts Target cell, and trigger handoff procedure;
Step 104: after Target cell was ready to Radio Resource, the cell-of-origin just sent to travelling carriage with the initial access power value of preserving by switching command message, and travelling carriage inserts Target cell according to the initial access power value in the switching command message.
As can be seen from the above-described embodiment, the method of definite initial access power after mobile station switching of the present invention, can dynamically adjust the initial access power of switching mobile station to target sub-district according to the quality that network signal covers, can cover under the relatively poor situation at network signal, guarantee the success of switching as far as possible; And under network signal covers preferably situation, when guaranteeing handover success, initial access power when reducing Target cell that travelling carriage switches to greatest extent, avoided in handoff procedure, the interference that causes owing to the access overflow of travelling carriage to other mobile station signals, thus the interference of whole net reduced.
In addition, use the method for dynamic adjustment travelling carriage initial access power of the present invention and also simplified the power control process of the mobile communication system after travelling carriage switches in the prior art, make in frequent handoff procedure, the fluctuation that the transmitting power of travelling carriage can be broken, thus the power consumption of travelling carriage reduced.
More than lift preferred embodiment; the purpose, technical solutions and advantages of the present invention have been carried out further detailed description; institute is understood that; the above is the preferred embodiments of the present invention; not in order to show the present invention; 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 (3)
1, a kind of method of definite initial access power after mobile station switching is characterized in that, is provided with and preserves the up received signal power that the neighbor cell expectation receives in the source cell base station equipment under current mobile station, and described method is specially:
A, carry out switch decision at source cell base station equipment, determine Target cell that travelling carriage will switch to after, source cell base station calculation of equipments travelling carriage inserts the required initial access power of Target cell, and starts handoff procedure;
B, after Target cell is ready to Radio Resource, source cell base station equipment inserts the required initial access power of Target cell with the travelling carriage that calculates and sends to travelling carriage, travelling carriage inserts Target cell with the initial access power that receives.
2, the method for claim 1, it is characterized in that the up received signal power that the current down receiving signal power of the described travelling carriage of step a inserts the required initial access power of Target cell Target cell that to be source cell base station equipment report according to travelling carriage, the Target cell expectation that sets in advance receive and the maximum transmission power of travelling carriage calculate;
Described calculating is specially:
If the current down receiving signal power of the Target cell that travelling carriage reports is less than or equal to the up received signal power that the Target cell expectation receives, then the required initial access power of travelling carriage access Target cell is the maximum transmission power of travelling carriage;
If the up received signal power that the current down receiving signal power of the Target cell that travelling carriage reports receives greater than the Target cell expectation, then to insert the required initial access power of Target cell be the poor of the maximum transmission power of the travelling carriage up received signal power that deducts the current down receiving signal power of Target cell that travelling carriage reports and Target cell expectation reception to travelling carriage.
3, the method for claim 1 is characterized in that, step b is described to be sent as source cell base station equipment and by switching command travelling carriage to be inserted the required initial access power of Target cell and send to travelling carriage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100700448A CN100391301C (en) | 2004-08-05 | 2004-08-05 | Method for determining initial access power after mobile station switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100700448A CN100391301C (en) | 2004-08-05 | 2004-08-05 | Method for determining initial access power after mobile station switching |
Publications (2)
| Publication Number | Publication Date |
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| CN1731886A true CN1731886A (en) | 2006-02-08 |
| CN100391301C CN100391301C (en) | 2008-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100700448A Expired - Fee Related CN100391301C (en) | 2004-08-05 | 2004-08-05 | Method for determining initial access power after mobile station switching |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012041187A1 (en) * | 2010-09-27 | 2012-04-05 | 电信科学技术研究院 | Interference information processing method and device |
| US8355411B2 (en) | 2006-07-03 | 2013-01-15 | Telefonaktiebolaget L M Ericsson (Publ) | Method and arrangement for handover in a radio access network |
| CN101617481B (en) * | 2006-08-16 | 2013-03-13 | Lg电子株式会社 | A method of controlling uplink output power in a wirless communication system |
| CN103650589A (en) * | 2013-07-30 | 2014-03-19 | 华为技术有限公司 | Switching method and user equipment |
| WO2016177110A1 (en) * | 2015-11-10 | 2016-11-10 | 中兴通讯股份有限公司 | Uplink interference control method and device, and computer readable storage medium |
| CN110446237A (en) * | 2018-05-03 | 2019-11-12 | 青岛海信移动通信技术股份有限公司 | A kind of the intelligent recommendation method and mobile terminal of network frequency range |
| CN112020128A (en) * | 2019-05-29 | 2020-12-01 | 中国电信股份有限公司 | Terminal and transmission power control method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5491837A (en) * | 1994-03-07 | 1996-02-13 | Ericsson Inc. | Method and system for channel allocation using power control and mobile-assisted handover measurements |
| FI96468C (en) * | 1994-05-11 | 1996-06-25 | Nokia Mobile Phones Ltd | Controlling the handover of a mobile radio station and adjusting the transmission power in the radio communication system |
| FI111580B (en) * | 1994-06-13 | 2003-08-15 | Nokia Corp | A power control method and arrangement for a handover in a mobile communication system |
| US6438116B1 (en) * | 1998-07-16 | 2002-08-20 | Telefonaktiebolaget L M Ericsson (Publ) | Adaptive power margin for hard handoffs in code division multiple access based systems |
-
2004
- 2004-08-05 CN CNB2004100700448A patent/CN100391301C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8355411B2 (en) | 2006-07-03 | 2013-01-15 | Telefonaktiebolaget L M Ericsson (Publ) | Method and arrangement for handover in a radio access network |
| CN101617481B (en) * | 2006-08-16 | 2013-03-13 | Lg电子株式会社 | A method of controlling uplink output power in a wirless communication system |
| WO2012041187A1 (en) * | 2010-09-27 | 2012-04-05 | 电信科学技术研究院 | Interference information processing method and device |
| CN102421135A (en) * | 2010-09-27 | 2012-04-18 | 电信科学技术研究院 | Method and device for processing interference information |
| CN102421135B (en) * | 2010-09-27 | 2015-05-20 | 电信科学技术研究院 | Method and device for processing interference information |
| US9210634B2 (en) | 2010-09-27 | 2015-12-08 | China Academy Of Telecommunications Technology | Interference information processing method and device |
| CN103650589A (en) * | 2013-07-30 | 2014-03-19 | 华为技术有限公司 | Switching method and user equipment |
| WO2015013888A1 (en) * | 2013-07-30 | 2015-02-05 | 华为技术有限公司 | Handover method and user equipment |
| WO2016177110A1 (en) * | 2015-11-10 | 2016-11-10 | 中兴通讯股份有限公司 | Uplink interference control method and device, and computer readable storage medium |
| CN110446237A (en) * | 2018-05-03 | 2019-11-12 | 青岛海信移动通信技术股份有限公司 | A kind of the intelligent recommendation method and mobile terminal of network frequency range |
| CN112020128A (en) * | 2019-05-29 | 2020-12-01 | 中国电信股份有限公司 | Terminal and transmission power control method thereof |
| CN112020128B (en) * | 2019-05-29 | 2022-08-30 | 中国电信股份有限公司 | Terminal and transmission power control method thereof |
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| Publication number | Publication date |
|---|---|
| CN100391301C (en) | 2008-05-28 |
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