CN1472902A - Semi-flexible switching method used in CDMA substation system - Google Patents
Semi-flexible switching method used in CDMA substation system Download PDFInfo
- Publication number
- CN1472902A CN1472902A CNA021363757A CN02136375A CN1472902A CN 1472902 A CN1472902 A CN 1472902A CN A021363757 A CNA021363757 A CN A021363757A CN 02136375 A CN02136375 A CN 02136375A CN 1472902 A CN1472902 A CN 1472902A
- Authority
- CN
- China
- Prior art keywords
- soft
- pilot
- medium
- base station
- switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention discloses a switching method with sub-software used in the CDMA base station system, characterized in that the system starts the actuating process of switching with sub-software by the co-action of introducing the parameters on the basis of distance and measuring the intensity variation of the pilot frequency signals by the mobile station while controlling effectively the loads share between the respectively carrier frequencies by the base station during switching with sub-software, not only overcoming the lack of the property in technique of switching with software, avoiding the loss of talk resulting from excessively frequent switch with sub-software, but also making use of the system resources most effectively, increasing the capacity of the system as most as possible.
Description
Technical field
The present invention relates to code division multiple access (CDMA) moving communicating field, specifically, relate to base station in the cdma system according to the Pilot Strength Measurement Message of receiving (Pilot Strength Measurement Message) with measure the method for the medium-soft switching of finishing based on the parameter of distance.
Background technology
In cdma system, the Mobile Origination call, realization is communicated by letter with a certain base station controller, and this moment, travelling carriage was set up Traffic Channel on a certain carrier frequency of this base station; Travelling carriage is in the process that moves, when the intensity of the pilot signal that detects another carrier frequency has surpassed in advance the increase thresholding that is provided with by base station controller, travelling carriage can be by Pilot Strength Measurement Message to base station controller report pilot signal strength and relevant information, base station controller was judged according to handoff algorithms and was indicated travelling carriage to do which kind of switching and enter the respective streams journey this moment, finished once and switched.But possibly can't finish switching because resource etc. are limited in the same carrier, need setover by change carrier frequency and frame and realize this moment, is called medium-soft and switches.Having many patents how to carry out medium-soft about the base station at present switches.As the patent No. is US6,393, how 003 United States Patent (USP) " be applied to overloading frequently medium-soft changing method Semi-soft handoff method that uses multiple common frequency " has just set forth the load condition that reports each sub-district in the Pilot Strength Measurement Message of base station and the base station according to travelling carriage, selects the pilot signal that expection switches and carries out the method that medium-soft is switched.But this method can't effectively be avoided, and travelling carriage carries out repeatedly frequently in overloading that medium-soft is switched and the increase of the system loading that brings and the waste of respective resources in some cases.
Summary of the invention
The technical assignment that the present invention will solve is to propose the method that a kind of general medium-soft is switched, and is used in and realizes the switching of medium-soft fast and effectively in the base station controller.
Changing method proposed by the invention may further comprise the steps:
1. the Pilot Strength Measurement Message of base station receiving mobile;
2. the information such as Pilot Strength Measurement Message that report according to travelling carriage of base station, whether the condition judgment of calling system setting can carry out medium-soft switches;
3., then carry out medium-soft and switch, order execution in step 4 and step 5 if satisfy condition; Switch if do not satisfy then carry out other type;
4. in neighbor cell, search and distribute efficient resource, and switch by sending extended handoff direction messages indication travelling carriage;
5. judge whether to be in critical sub-district after switching, if pilot signal transmitted ionization meter request instruction message then, otherwise do not send.
The condition that can carry out the medium-soft switching in the system's setting described in the step 2 is as follows, and all conditions will satisfy simultaneously:
A. the pilot tone in all active sets is all in critical sub-district;
B. do not require to increase new pilot tone in the pilot strength measurement report message that mobile phone reports;
C. the search window center of the pilot tone in all active sets all is greater than thresholding T_RTD;
D. pilot frequency intensity is not more than 1 greater than the pilot tone number of thresholding T_Drop in the active set;
E. pilot frequency intensity all must be less than thresholding T_DROP_SSHO in all active sets.
The medium-soft changing method of a kind of cdma system that the present invention proposes, be applicable in the present code division multiple access system, it is characterized in that this system comes acting in conjunction to start activation medium-soft handoff procedure by the variation of introducing based on the measured pilot signal strength of distance parameter and travelling carriage, simultaneously, sharing of loading between each carrier frequency effectively controlled in the base station in the medium-soft handoff procedure, not only improved the deficiency of the performance of soft hand-off, avoided too frequent medium-soft to switch the call drop that causes, more mainly be to the most effective utilization of system resource, improve power system capacity to a greater degree.
Description of drawings
Fig. 1 is the flow chart of switching flow in the method for the invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Before describing the present invention in detail,, introduce the several notions in the cdma system earlier for ease of understanding.
1. the active set of travelling carriage;
It is effective pilot signal collection, comprise the pilot signal that the assignment travelling carriage interrelates with the forward direction Traffic Channel, the beginning base station provided effective pilot signal set content by extended handoff direction messages or switch indicating information afterwards by the content of the effective pilot signal collection of channel assignment message notice travelling carriage.
2. critical sub-district, T_RTD, T_DROP_SSHO and T_Drop;
Critical sub-district refers to and allows travelling carriage to carry out the sub-district that medium-soft is switched.
T_RTD (Real Time Delay) is the search window center, be equivalent to mobile station signal from be transmitted into the base station receive the distance (time) of process.
T_DROP_SSHO is the medium-soft handoff threshold, just allows to do medium-soft and switch when the intensity of effectively concentrating all pilot tones all is lower than it.
T_Drop is that soft handover removes thresholding.
With reference to Fig. 1, travelling carriage is at first set up with the base station and is communicated by letter, and enters talking state, if this moment, travelling carriage sent Pilot Strength Measurement Message, then the base station will judge whether to carry out the medium-soft switching according to message content.In Rule of judgment, introduce this parameter of T_RTD of knowing clearly, promptly about the parameter of distance (time) between travelling carriage and base station, avoid travelling carriage nearer from the base station when regional the frequent medium-soft of carrying out switch, cause overloading frequently between laod unbalance; Guaranteed that simultaneously the medium-soft of carrying out that travelling carriage can success when signal strength signal intensity is more weak really switches.Other parameter mainly is at first can carry out soft handover in order to ensure travelling carriage in Rule of judgment.The base station judge need do medium-soft and switch after, the base station is carried out medium-soft according to resource situation indication travelling carriage again and is switched.After switching is finished, be according to the purpose that whether has pilot tone to belong to critical sub-district pilot signal transmitted ionization meter request message in the active set, at this moment under the situation of wireless environment more complicated, thereby the situation of change of the active set of the grasp travelling carriage that the base station can be real-time is made suitable processing, improve speech quality, reduce cutting off rate.
Claims (2)
1, a kind of medium-soft changing method of using in CDMA base station system is characterized in that comprising; (1) Pilot Strength Measurement Message of base station receiving mobile; (2) information such as Pilot Strength Measurement Message that report according to travelling carriage of base station, whether the condition judgment of calling system setting can carry out medium-soft switches; (3), then carry out medium-soft and switch, order execution in step (4) and step (5) if satisfy condition; Switch if do not satisfy then carry out other type; (4) in neighbor cell, search and distribute efficient resource, and switch by sending extended handoff direction messages indication travelling carriage; (5) judge whether to be in critical sub-district after switching, if pilot signal transmitted ionization meter request instruction message then, otherwise do not send.
2, medium-soft changing method according to claim 1, it is characterized in that the condition that can carry out the medium-soft switching of the system's setting described in the described step (2) is as follows, and all conditions will satisfy simultaneously:
A. the pilot tone in all active sets is all in critical sub-district;
B. do not require to increase new pilot tone in the pilot strength measurement report message that mobile phone reports;
C. the search window center of the pilot tone in all active sets all is greater than thresholding T_RTD;
D. pilot frequency intensity is not more than 1 greater than the pilot tone number of thresholding T_Drop in the active set;
E. pilot frequency intensity all must be less than thresholding T_DROP_SSHO in all active sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021363757A CN1317917C (en) | 2002-07-31 | 2002-07-31 | Semi-flexible switching method used in CDMA substation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021363757A CN1317917C (en) | 2002-07-31 | 2002-07-31 | Semi-flexible switching method used in CDMA substation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1472902A true CN1472902A (en) | 2004-02-04 |
| CN1317917C CN1317917C (en) | 2007-05-23 |
Family
ID=34146436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021363757A Expired - Fee Related CN1317917C (en) | 2002-07-31 | 2002-07-31 | Semi-flexible switching method used in CDMA substation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1317917C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007128226A1 (en) * | 2006-04-29 | 2007-11-15 | Huawei Technologies Co., Ltd. | A method and ue for measuring the adjacent cell |
| CN100433935C (en) * | 2006-09-15 | 2008-11-12 | 上海贝尔三星移动通信有限公司 | Method and device for optimizing soft switching ratio in code division multiple access mobile communication system |
| CN101516095B (en) * | 2009-03-19 | 2011-02-09 | 华为技术有限公司 | Method, device and system for distributing carrier wave |
| WO2012010038A1 (en) * | 2010-07-22 | 2012-01-26 | 中兴通讯股份有限公司 | Interference information equalization method and system for inter-cell interference coordination |
| CN101356839B (en) * | 2005-08-26 | 2012-08-15 | 朗迅科技公司 | Handoff method for use in wireless communications network with shared supplemental spreading codes |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU712633B2 (en) * | 1995-08-31 | 1999-11-11 | Nokia Telecommunications Oy | A method for selecting the way to perform a handover, and a cellular radio system |
| KR100259846B1 (en) * | 1997-08-22 | 2000-06-15 | 윤종용 | Semi-soft handoff |
-
2002
- 2002-07-31 CN CNB021363757A patent/CN1317917C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101356839B (en) * | 2005-08-26 | 2012-08-15 | 朗迅科技公司 | Handoff method for use in wireless communications network with shared supplemental spreading codes |
| WO2007128226A1 (en) * | 2006-04-29 | 2007-11-15 | Huawei Technologies Co., Ltd. | A method and ue for measuring the adjacent cell |
| CN100433935C (en) * | 2006-09-15 | 2008-11-12 | 上海贝尔三星移动通信有限公司 | Method and device for optimizing soft switching ratio in code division multiple access mobile communication system |
| CN101516095B (en) * | 2009-03-19 | 2011-02-09 | 华为技术有限公司 | Method, device and system for distributing carrier wave |
| WO2012010038A1 (en) * | 2010-07-22 | 2012-01-26 | 中兴通讯股份有限公司 | Interference information equalization method and system for inter-cell interference coordination |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1317917C (en) | 2007-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1155283C (en) | In-band cross-area switching method | |
| CN101583169B (en) | Method and equipment for selecting cell access for terminal equipment | |
| EP1553715B1 (en) | A method for decide cdma frequency hard hand-off | |
| EP1038411B1 (en) | Advanced method for executing handover | |
| CN100461959C (en) | Cell switching control method of high speed moving terminal | |
| CN1106132C (en) | Handoff device for mobile communication system | |
| CN1237838A (en) | Method and system for controlling pilot measurement request order (PMRO) | |
| CN101547409A (en) | Method, terminal, network side equipment and network system for maintaining service continuity | |
| CN1219829A (en) | Method for processing hard handoff in digital communication system | |
| CN1285239C (en) | Method for cell switching in mobile communication system | |
| CN1210901C (en) | Resource allocation method on switching for CDMa base station system | |
| CN101657031B (en) | Communication method of wireless mesh network and movable access point | |
| CN1317917C (en) | Semi-flexible switching method used in CDMA substation system | |
| CN101720094A (en) | Communication covering method and system for roads | |
| CN1263239C (en) | Soft switching method in wideband CDMA system | |
| CN1241347C (en) | Fast switching method based on dual-threshold judgement | |
| CN1154274C (en) | Control method and device for compression mode in CDMA system | |
| CN1277791A (en) | Method and system for channel allocation in dual band network | |
| CN100389625C (en) | Method of gathering statistics of channel resource occupancy in mobile communication system | |
| CN1578488A (en) | Method for controlling Load of 3G mobile communication system | |
| US20080064403A1 (en) | Handover method in a wireless access network Handover method in a wireless access network | |
| CN1305688A (en) | Handoven-method in cellular radio system | |
| CN1391407A (en) | Seamless talking switching system and method for global radio mobile communication system | |
| CN1399431A (en) | Hard switching method for service frequency in mobile communication | |
| CN101640909B (en) | Measurement control method of conversion between continuous transceiving mode and non-continuous transceiving mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070523 Termination date: 20190731 |