CN1878416B - Method for triggering handover of mobile terminal and system thereof - Google Patents
Method for triggering handover of mobile terminal and system thereof Download PDFInfo
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- CN1878416B CN1878416B CN2006100917340A CN200610091734A CN1878416B CN 1878416 B CN1878416 B CN 1878416B CN 2006100917340 A CN2006100917340 A CN 2006100917340A CN 200610091734 A CN200610091734 A CN 200610091734A CN 1878416 B CN1878416 B CN 1878416B
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- base station
- portable terminal
- rnc
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70718—Particular systems or standards
- H04B2201/70724—UMTS
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A method for triggering a communication event of a mobile terminal is provided. The method includes transmitting a message from the mobile terminal to a radio network controller (RNC) to request a specific event be performed; and re-transmitting the message from the mobile terminal to the RNC based on a predetermined condition exists.
Description
The application requires korean patent application 10-2005-0050018 number submitted on June 10th, 2005 in Korea S and the priority of the korean patent application submitted on June 13rd, 2005 10-2005-0050581 number, and its full content is comprised fully and is incorporated herein by reference at this.
Technical field
The present invention relates to portable terminal, and more specifically say the method and system that relates to the handover work that is used for triggering mobile terminals.
Background technology
The portable terminal that uses Universal Mobile Telecommunications System (UMTS) and Wideband Code Division Multiple Access (WCDMA) (WCDMA) technology is the work of execution handover when current control signal of base station strength reduction.In addition, handover work is that wherein portable terminal switches to control the work of new base station when moving forward into new sub-district.Therefore, in handover work, when walking, keeps portable terminal call communication between different districts.In more detail, when portable terminal is leaving first base station when move second base station, the signal strength signal intensity between first base station and portable terminal dies down, and the signal strength signal intensity grow between second base station and portable terminal.Therefore, when in the signal strength signal intensity between second base station and the portable terminal during greater than the signal strength signal intensity between first base station and portable terminal, portable terminal switches to second base station.
For example, Fig. 1 is the flow chart that has illustrated according to the handover work of prior art.As shown in Figure 1, when portable terminal moves between first and second sub-districts corresponding to first and second base stations, and when the signal strength signal intensity between the portable terminal and first base station is fallen under the threshold level, portable terminal will send to radio network controller (RNC) such as the message of this class of handover measurement report, and the handover work (EVENT 1B) to second base station with stronger signal strength signal intensity is carried out in request.
Afterwards, RNC upgrades the active set (active set) of portable terminal in response to the handover measurement report.This active set is updated to and comprises new base station B.RNC will comprise that the active set updating message of the second new paging station B sends to portable terminal afterwards.In addition, handover work is soft handover (SHO) work.In case receive the active set updating message from RNC, portable terminal sends the active set renewal to RNC and finishes message, to finish this handover work to second base station with stronger signal strength signal intensity.
In addition, at the handover duration of work, portable terminal only sends the one-shot measurement report to RNC.Therefore, shown in the bottom of Fig. 1,, then call out and to be disconnected if measurement report message is not handled by RNC or lost.That is a little less than the signal strength signal intensity between first base station and the portable terminal may become too, so that calling disconnected before completing successfully handover work.United States Patent (USP) the 6th, 615 No. 044, the 6th, 845, No. 238 and the 6th, 879, also discloses the method for handover of prior art in No. 831.
Summary of the invention
Therefore, if an object of the present invention is not give RNC, carry out handover work effectively by receiving the response of message then resend handoff request message during at the fixed time from RNC.
Another object of the present invention is to be handed over to first base station recently when portable terminal, when still present second base station has stronger signal strength signal intensity, handoff request message is sent to RNC, and request is handed over to second base station.
For realizing above-mentioned purpose in whole or in part at least, the method of the communication event that is used for triggering mobile terminals is provided among the present invention in one aspect, this method comprises: send handoff request message from portable terminal and carry out the handover incident to radio network controller (RNC) with request, wherein this handoff request message comprises at least the first and second signal of base station intensity; RNC will comprise that again the message of first base station sends to portable terminal, and described first base station has and is higher than the second signal of base station intensity; When the signal strength signal intensity between the portable terminal and second base station be not less than the threshold level that the handover incident takes place and be higher than portable terminal and first base station between signal strength signal intensity the time, forcibly retransmit the handoff request message that comprises the second signal of base station intensity to described RNC.
According on the other hand, the invention provides a kind of communication system, it comprises: portable terminal is configured to and another portable terminal radio communication; A plurality of base stations are configured to control portable terminal when each base station of portable terminal process; And radio network controller (RNC), be configured to control a plurality of base stations and portable terminal, wherein this portable terminal sends to RNC with handoff request message and carries out the handover incident with request, and this handoff request message comprises at least the first and second signal of base station intensity of a plurality of base stations; This RNC will comprise that again the message of first base station sends to portable terminal, and described first base station has and is higher than the second signal of base station intensity; When the signal strength signal intensity between the portable terminal and second base station be not less than the threshold level that the handover incident takes place and be higher than portable terminal and first base station between signal strength signal intensity the time, forcibly retransmit the handoff request message that comprises the second signal of base station intensity to described RNC.
According on the other hand, the invention provides a kind of portable terminal, it comprises: physical layer, it is used to measure the measure signal intensity that receives from a plurality of base stations; Radio Link control (RLC) layer, it is used for transmission/reception message to radio network controller (RNC), and request switches to new base station with mobile terminal skip zone; With Radio Resource control (RRC) layer, it is used for when according to when the handover incident takes place physical layer place measured signal strengths, handoff request message is sent to RNC via rlc layer, and wherein this handoff request message comprises at least the first and second signal of base station intensity of a plurality of base stations; This RNC will comprise that again the message of first base station sends to portable terminal, and described first base station has and is higher than the second signal of base station intensity; When the signal strength signal intensity between the portable terminal and second base station be not less than the threshold level that the handover incident takes place and be higher than portable terminal and first base station between signal strength signal intensity the time, described rrc layer is forcibly retransmitted the handoff request message that comprises the second signal of base station intensity.
Other advantage of the present invention, purpose and feature will partly be described in explanation subsequently, and through following check or study from the practice of the present invention, above-mentioned advantage, purpose and feature are conspicuous for the person of ordinary skill of the art.Objects and advantages of the present invention can realize and obtain as specifically noted in the claims.
Description of drawings
To represent accompanying drawing detailed description the present invention of similar elements with reference to wherein identical Reference numeral, wherein:
Fig. 1 shows the flow chart according to the method for the handover work of the triggering mobile terminals of prior art;
Fig. 2 shows the overview according to the system of the handover work of triggering mobile terminals of the present invention;
Fig. 3 shows the flow chart according to the method for the handover work of the triggering mobile terminals of first embodiment of the invention;
Fig. 4 shows the flow chart according to the method for the handover work of the triggering mobile terminals of second embodiment of the invention;
Fig. 5 shows the block diagram according to the system of the handover work of the triggering mobile terminals of second embodiment of the invention.
Embodiment
The method of the handover work of triggering mobile terminals according to the preferred embodiment of the invention will be described with reference to the drawings.
In more detail, Fig. 2 shows the overview according to the system of the handover work of triggering mobile terminals of the present invention.As shown in the figure, this system comprises portable terminal (MT) 11, the first base stations (BS) 12, second base station (BS) 13 and RNC14.RNC14 controls BS12 and 13, and Fig. 2 shows the MT11 that is just communicating by letter with the 2nd BS (sub-district) 13.
Forward Fig. 3 afterwards to, it shows the flow chart according to the method for the handover work of the triggering mobile terminals of first embodiment of the invention.Also relate to Fig. 2 in this explanation.As shown in Figure 3, MT11 will ask the message of handover work to send to RNC14 when according to the signal strength signal intensity between MT11 and the BS13 handover incident taking place.For example, if MT11 just moves towards BS12, it is more weak that the signal strength signal intensity between MT11 and BS13 will become, and the signal strength signal intensity between MT11 and BS12 will become stronger.Therefore, in this situation, MT11 asks to carry out handoff operation to BS12 by sending measurement report message to RNC14.
That is, handover work relates to such function: the portable terminal in being in the call communication state is outside relevant base station service areas (cell boarder), and when adjacent base station service areas moved, the signal strength signal intensity between relevant base station and the portable terminal died down.Therefore, for keeping current call state, MT11 automatically tunes to the new Traffic Channel of adjacent base station via handover work.That is MT11 is wirelessly linked to adjacent base station to keep communication link.
In addition, as shown in Figure 3, MT11 determines whether receive response from RNC14 in the stand-by time that sets in advance (for example, one or two second).If do not receive response in the stand-by time that sets in advance, the message of MT11 re-send request may handover work is to RNC14.
But if receive response for the handover measurement report from RNC14 in the time that sets in advance, then MT11 carries out handover work.Say that in further detail RNC14 upgrades the active set of MT11 in response to the handover measurement report, and the active set that upgrades is sent to MT11.In above-mentioned example, when MT11 just when BS12 moves, active set will comprise that BS12 replaces BS13, thus MT11 switches to BS12.That is, the Radio Link of MT11 release and BS13, and be wirelessly linked to BS12.In addition, when MT11 successfully receives the active set updating message from RNC14, and during the work of successful execution handover, MT11 sends active set and upgrades and finishes message to RNC14, stops the triggering of the handover work of MT11 thus.
Therefore, when the handover measurement report message that is sent to RNC14 by MT11 is lost because of for example network failure, so that RNC14 is not when receiving message, and RNC can't send to MT11 with appropriate responsive.But according to embodiments of the invention, as shown in Figure 3, when the special time of response do not exist during to(for) handover incident (EVENT 1B), the message of MT11 re-send request may handover work prevents dropped calls thus.
Forward Fig. 4 afterwards to, it shows the flow chart according to the method for the handover work of the triggering mobile terminals of second embodiment of the invention.In Fig. 4, the signal strength signal intensity between MT11 and its control base station dies down, so MT11 sends to RNC14 with measurement report, and the request handover procedure.In this situation, measurement report comprises the information (for example, signal strength signal intensity) of the first and second base station A and B.Afterwards, as shown in Figure 4, RNC14 will comprise that the active set updating message of base station A sends to MT11, and this is that base station A has stronger signal strength signal intensity (just, the signal strength signal intensity of base station A is greater than the signal strength signal intensity of base station B) because at this moment.
But in the prior art, RNC14 only allows to carry out handover work with respect to the first base station A with the strongest signal strength signal intensity.Therefore, when with respect to the leaving trigger condition and be not met of the second base station B (for example, signal strength signal intensity between the MT11 and the second base station B is not less than predetermined threshold), owing to handover takes place (just with base station A, RNC will comprise that the active set updating message of base station A sends to MT11), so RNC14 does not allow the periodic report of the handover incident (EVENT 1C) for base station B.In other words, RNC14 determines that the signal strength signal intensity of base station A is the strongest, does not therefore allow MT11 to connect base station B (RNC does not allow the periodic report about the handover incident C of base station B).
Therefore, the strongest even the signal strength signal intensity of the second base station B becomes after the just definite base station A of RNC14 has strongest signal strength immediately, MT11 does not send the handover measurement report that is used to be handed over to the second base station B.Therefore, MT11 can not carry out the handover of the second base station B.Thereby, when except other adjacent base station of the second base station B signal strength signal intensity when dying down, MT11 can not be handed over to base station B, and dropped calls.
But,, automatically with the MT11 and the second base station B wireless link, prevent dropped calls when dying down by signal strength signal intensity at other adjacent base station according to embodiments of the invention.In other words, as shown in Figure 4, the active set updating message that sends to MT11 from RNC14 only comprises base station A (just, the second base station B is not included in the active set).In this situation, when with respect to the leaving trigger condition and be not met of base station B, and when the signal strength signal intensity of the second base station B becomes the strongest, even RNC14 does not allow the periodic report of handover incident (EVENT1C), MT11 retransmits the measurement report that is used to be handed over to the second base station B.Say in further detail, therein base station A have the signal strength signal intensity stronger than base station B after the initial handover work of base station A since this signal of base station intensity become the strongest, so handover incident 1C takes place once more.In this situation, MT retransmits the measurement report comprise base station B and gives RNC, to carry out with respect in the handover of base station B.
Forward Fig. 5 afterwards to, it shows the block diagram according to the system of the triggering handover work of second embodiment of the invention.As shown in the figure, system comprises MT11, it is used for from a plurality of base stations 30 received signals, measure the intensity of the signal that receives, even and be used for RNC do not allow periodic report, second base station not satisfy to leave about handover incident (EVENT 1C) trigger condition and when with respect to first and second base stations handover incident takes place after when active set only comprises first base station, transmission handover measurement report is asked the handover work for second base station.System also comprises RNC 14, and it is wirelessly linked to the second base station B by upgrade the active set of MT11 in response to the handover measurement report with MT11.
In addition, as shown in Figure 5, MT11 comprises the physical layer 11C that is used to measure each signal strength signal intensity that receives from a plurality of base stations 30, be used to send/receive for the Radio Link of the message of between MT11 and base station, carrying out handover work use and control (RLC) layer 11B, and Radio Resource control (RRC) layer 11A, this Radio Resource control (RRC) layer 11A is used for when according to physical layer 11C place measured signal strengths the handover incident taking place, by rlc layer 11B the handover measurement report is sent to RNC14, and leave trigger condition and retransmit measurement report when the handover incident takes place once more when not satisfying, to notify this handover incident to RNC14.
In addition, RNC14 analyzes the measurement report that receives from the rlc layer 11B of MT11, and if based on analysis result, the handover executive condition is met, and then RNC14 sends to rlc layer 11C with active set updating message (that is handover authentication message).MT11 receives the active set updating message by rlc layer 11B, and rrc layer 11A carries out handover work according to the active set updating message.After MT11 finished handover work, MT11 finished message (that is, handover is finished message) with the active set renewal and sends to RNC14, finishes the handover work of MT11 thus.
In addition, in the present invention, by a plurality of communication events definition special parameters (for example, report interval, report amount etc.) for not being defined as yet, then except the handover incident, message that can also the re-send request may communication event.
As previously mentioned, the method and system according to the handover of triggering mobile terminals of the present invention has lot of advantages.For example, when do not exist at the time durations that sets in advance from RNC to the handover message request responding time, resend message prevents dropped calls thus.In addition, after first base station and portable terminal wireless link are got up, and, the second signal of base station intensity do not become when leaving trigger condition when the strongest when not allowing not satisfy about the periodic report of handover incident (EVENT 1C) and second base station at RNC14, portable terminal will comprise that the measurement report of second base station sends to RNC, make when the signal strength signal intensity of other adjacent base station when being weak, portable terminal links with second base station radio, prevents dropped calls thus.
In addition, portable terminal can be applicable in the mobile communication system such as UMTS (Universal Mobile Telecommunications System), WCDMA (Wideband Code Division Multiple Access (WCDMA)) system etc.In addition, handover work is soft handover, and wherein mobile terminal locations is kept and the communicating by letter of its initial control base station, up to finishing and the communicating by letter of new base station.
Describe the present invention like this, clearly can make multiple modification.This modification should not be considered to break away from the spirit and scope of the present invention, and all changes that it will be apparent to those skilled in the art that all are intended to be included among the scope of following claim.
Claims (8)
1. method that is used for the communication event of triggering mobile terminals, described method comprises:
Send handoff request message from portable terminal and carry out the handover incident to radio network controller (RNC) with request, wherein this handoff request message comprises at least the first and second signal of base station intensity; Described RNC will comprise that again the message of first base station sends to portable terminal, and described first base station has and is higher than the second signal of base station intensity; And
When the signal strength signal intensity between the portable terminal and second base station be not less than the threshold level that the handover incident takes place and be higher than portable terminal and first base station between signal strength signal intensity the time, forcibly retransmit the handoff request message that comprises the second signal of base station intensity to described RNC.
2. the method for claim 1, wherein this is a measurement report by the handoff request message that portable terminal sends to RNC, and this is the active set updating message from the message that RNC sends to portable terminal.
3. communication system, it comprises:
Portable terminal is configured to and another portable terminal radio communication;
A plurality of base stations are configured to control portable terminal when each base station of portable terminal process; With
Radio network controller (RNC) is configured to control a plurality of base stations and portable terminal,
Wherein this portable terminal sends to RNC with handoff request message, carries out the handover incident with request, and this handoff request message comprises at least the first and second signal of base station intensity in a plurality of base stations; This RNC will comprise that again the message of first base station sends to portable terminal, and described first base station has and is higher than the second signal of base station intensity; When the signal strength signal intensity between the portable terminal and second base station be not less than the threshold level that the handover incident takes place and be higher than portable terminal and first base station between signal strength signal intensity the time, forcibly retransmit the handoff request message that comprises the second signal of base station intensity to described RNC.
4. system as claimed in claim 3, wherein, if do not receive response to handoff request message from RNC at the time durations that sets in advance, then this portable terminal is retransmitted handoff request message.
5. system as claimed in claim 3, wherein, this is a measurement report by the handoff request message that portable terminal sends to RNC, and this is the active set updating message from the message that RNC sends to portable terminal.
6. portable terminal, it comprises:
Physical layer, it is used to measure the measure signal intensity that receives from a plurality of base stations;
Radio Link control rlc layer, it is used for transmission/reception message to radio network controller (RNC), and request switches to new base station with mobile terminal skip zone; With
The radio resource control RRC layer, it is used for when based on physical layer place measured signal strengths the handover incident taking place, handoff request message is sent to RNC via rlc layer, and wherein this handoff request message comprises at least the first and second signal of base station intensity in a plurality of base stations; This RNC will comprise that again the message of first base station sends to portable terminal, and described first base station has and is higher than the second signal of base station intensity; When the signal strength signal intensity between the portable terminal and second base station be not less than the threshold level that the handover incident takes place and be higher than portable terminal and first base station between signal strength signal intensity the time, described rrc layer is forcibly retransmitted the handoff request message that comprises the second signal of base station intensity.
7. portable terminal as claimed in claim 6, wherein, if do not receive response to handoff request message from RNC at the time durations that sets in advance, then this rrc layer is retransmitted handoff request message.
8. portable terminal as claimed in claim 6, wherein, this is a measurement report by the handoff request message that portable terminal sends to RNC, and this is the active set updating message from the message that RNC sends to portable terminal.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050050018 | 2005-06-10 | ||
| KR10-2005-0050018 | 2005-06-10 | ||
| KR1020050050018A KR100677459B1 (en) | 2005-06-10 | 2005-06-10 | Method for processing a handover in a mobile communication system and system therefor |
| KR10-2005-0050581 | 2005-06-13 | ||
| KR1020050050581 | 2005-06-13 | ||
| KR1020050050581A KR100677460B1 (en) | 2005-06-13 | 2005-06-13 | Method for triggering handover of mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1878416A CN1878416A (en) | 2006-12-13 |
| CN1878416B true CN1878416B (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100917340A Expired - Fee Related CN1878416B (en) | 2005-06-10 | 2006-06-12 | Method for triggering handover of mobile terminal and system thereof |
Country Status (2)
| Country | Link |
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| KR (1) | KR100677459B1 (en) |
| CN (1) | CN1878416B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100895180B1 (en) * | 2006-04-14 | 2009-04-24 | 삼성전자주식회사 | Method for Radio Resource Control Connection Setup and Apparatus for the same |
| WO2015139300A1 (en) * | 2014-03-21 | 2015-09-24 | Nokia Technologies Oy | Parallel preamble transmission in power limited situations |
| CN108616804B (en) * | 2016-12-23 | 2020-09-29 | 中国移动通信有限公司研究院 | Switching method and device |
| CN110463267B (en) * | 2017-03-23 | 2022-07-01 | 摩托罗拉移动有限责任公司 | Apparatus and method for discarding data corresponding to conditional switch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1269684A (en) * | 1999-04-07 | 2000-10-11 | 株式会社东芝 | Mobile terminal having function of asking for switching-over, switching-over control apparatus and method and storage medium |
| US6256501B1 (en) * | 1997-07-03 | 2001-07-03 | Oki Electric Industry Co., Ltd. | Cellular mobile telecommunications system for controlling a hand-off by a mobile station |
| CN1487754A (en) * | 2002-08-21 | 2004-04-07 | Lg������ʽ���� | Shift processing method for mobile communication system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1192830A1 (en) | 1999-06-24 | 2002-04-03 | Telefonaktiebolaget LM Ericsson (publ) | Network-evaluated handover assisted by both mobile and base-stations |
| KR20040036863A (en) * | 2002-10-25 | 2004-05-03 | 삼성전자주식회사 | Method for transmitting measurement report message in universal mobile telecommunication systems |
| JP4255357B2 (en) | 2003-10-29 | 2009-04-15 | 京セラ株式会社 | Handoff control method and wireless device using the same |
-
2005
- 2005-06-10 KR KR1020050050018A patent/KR100677459B1/en not_active IP Right Cessation
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2006
- 2006-06-12 CN CN2006100917340A patent/CN1878416B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6256501B1 (en) * | 1997-07-03 | 2001-07-03 | Oki Electric Industry Co., Ltd. | Cellular mobile telecommunications system for controlling a hand-off by a mobile station |
| CN1269684A (en) * | 1999-04-07 | 2000-10-11 | 株式会社东芝 | Mobile terminal having function of asking for switching-over, switching-over control apparatus and method and storage medium |
| CN1487754A (en) * | 2002-08-21 | 2004-04-07 | Lg������ʽ���� | Shift processing method for mobile communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1878416A (en) | 2006-12-13 |
| KR100677459B1 (en) | 2007-02-02 |
| KR20060128513A (en) | 2006-12-14 |
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