KR20010028045A - Access hand-off method of cellular mobile communication system - Google Patents

Access hand-off method of cellular mobile communication system Download PDF

Info

Publication number
KR20010028045A
KR20010028045A KR1019990040091A KR19990040091A KR20010028045A KR 20010028045 A KR20010028045 A KR 20010028045A KR 1019990040091 A KR1019990040091 A KR 1019990040091A KR 19990040091 A KR19990040091 A KR 19990040091A KR 20010028045 A KR20010028045 A KR 20010028045A
Authority
KR
South Korea
Prior art keywords
message
csm
mobile station
access
transmits
Prior art date
Application number
KR1019990040091A
Other languages
Korean (ko)
Other versions
KR100347415B1 (en
Inventor
김성국
Original Assignee
박종섭
현대전자산업 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 박종섭, 현대전자산업 주식회사 filed Critical 박종섭
Priority to KR1019990040091A priority Critical patent/KR100347415B1/en
Publication of KR20010028045A publication Critical patent/KR20010028045A/en
Application granted granted Critical
Publication of KR100347415B1 publication Critical patent/KR100347415B1/en

Links

Classifications

    • 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
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

Abstract

PURPOSE: A method for performing access handoff in a cellular mobile communication system is provided to analyze origination messages of a base station, which are received from a mobile station, in handoff generated when the mobile station transmits origination/termination calls and moves a boundary surface before the calls are connected, and to predict a moving path of the mobile station. CONSTITUTION: An access handoff is generated when a mobile station transmits origination/termination calls and moves a boundary surface before the calls are connected. A cellular mobile communication system analyzes a pilot offset and a pilot strength among origination messages of a base station, which are received in a mobile station. The cellular mobile communication system predicts a moving path of the mobile station, and assigns resources of the base station relating to a handoff generated before the calls are connected. The cellular mobile communication system transmits a mobile station acknowledge message(BS_ACK message) or a channel assign message to the mobile station.

Description

셀룰러 이동통신 시스템의 억세스 핸드오프 방법{Access hand-off method of cellular mobile communication system}Access hand-off method of cellular mobile communication system

본 발명은 셀룰러 이동통신 시스템에 관한 것으로, 더욱 상세하게는 셀룰러 이동통신 시스템의 이동국이 발/착호를 송신하고 호가 소통되기 전에 경계면을 이동함으로써 발생하는 핸드오프시 원활한 호 소통을 유지하기 위한 셀룰러 이동통신 시스템의 억세스 핸드오프 방법에 관한 것이다.The present invention relates to a cellular mobile communication system, and more particularly, to mobile communication for maintaining smooth call communication during handoff caused by a mobile station transmitting a call / call and moving a boundary before the call is communicated. The present invention relates to an access handoff method of a communication system.

잘 알려진 바와 같이, 셀룰러 이동통신 시스템에서의 핸드오프(handoff)는 이동국이 셀의 경계를 벗어나 새로운 셀로 이동할 때, 이동국과 기지국의 무선링크가 끊어지지 않도록 유지하면서 현재의 기지국에서 새로운 기지국으로 옮겨지는 처리과정을 말한다.As is well known, handoff in a cellular mobile communication system moves from a current base station to a new base station while keeping the radio link between the mobile station and the base station unbroken when the mobile station moves out of the cell boundary to a new cell. It refers to the process.

이와 같은 핸드오프의 종류로는 기지국간의 소프트 핸드오프(soft handoff), 디지털 교환국간의 CDMA to CDMA 하드(hard) 핸드오프, 디지털과 아날로그 교환국간의 CDMA to 아날로그 핸드오프, 동일 기지국내의 섹터간의 소프터(softer) 핸드오프 및 유휴(idle) 핸드오프 등이 있으며, 이러한 각종 핸드오프의 처리과정은 IS-95B(CDMA 방식을 이용한 디지털 셀룰러 이동통신 시스템간의 호환을 위한 잠정 표준안)를 지원하는 통상의 이동통신 관련 기술서적에 공지되어 있는 바와 같으므로, 여기서 상기 종래의 핸드오프 기술에 대한 상세한 설명은 생략하기로 한다.These types of handoffs include soft handoff between base stations, CDMA to CDMA hard handoff between digital switching stations, CDMA to analog handoff between digital and analog switching stations, and softer between sectors within the same base station. (softer) handoff and idle handoff, and the processing of these various handoffs is a common move supporting IS-95B (provisional standard for compatibility between digital cellular mobile communication systems using CDMA) As it is known in the communication related technical book, a detailed description of the conventional handoff technique will be omitted here.

그러나, 이와 같은 종래의 핸드오프 방법은, 이동국이 기지국간의 경계면을 빠른 속도로 통과하면서 발신이나 착신을 시도할 경우, 즉, 이동국이 발/착호를 송신하고 호가 소통되기 전에 이동국이 경계면을 이동함으로써 호가 소통되지 않는 상태에서 발생하는 핸드오프시에, 이동국은 발신 혹은 착신에 대한 응답으로 기지국으로부터 이동국에 송신하는 이동국 응답 메시지(BS_ACK message) 또는 채널 할당 메시지(Channel Assign message)를 수신하지 못하므로 호가 소통되지 않는 경우가 발생하여 호소통율을 저하시키는 문제점이 있었다.However, in the conventional handoff method, when a mobile station attempts to make or receive a call while passing through the interface between base stations at high speed, that is, the mobile station moves the interface before the mobile station transmits an incoming / outgoing call and the call is communicated. In a handoff that occurs while a call is not being communicated, the mobile station does not receive a BS_ACK message or a Channel Assign message from the base station to the mobile station in response to an originating or incoming call. There was a problem in that the communication rate is lowered to reduce communication appeal.

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 안출한 것으로 그 목적은, 이동국이 발/착호를 송신하고 호가 소통되기 전에 경계면을 이동함으로써 발생하는 핸드오프시에, 이동국에서 수신된 기지국의 발신 메시지(origination message)를 분석하여 이동국의 이동 경로를 예측함으로써 기지국의 자원을 미리 할당하도록 하여 호소통율을 향상시킨 셀룰러 이동통신 시스템의 억세스 핸드오프 방법을 제공함에 있다.Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a base station received at a mobile station at the time of handoff caused by the mobile station transmitting a call / call and moving the boundary before the call is communicated. The present invention provides an access handoff method of a cellular mobile communication system that improves the call rate by pre-allocating resources of a base station by analyzing an origination message of the mobile station and predicting a moving path of the mobile station.

도 1은 본 발명에 따른 기지국 내의 억세스 핸드오프 처리 흐름도,1 is a flowchart of an access handoff process in a base station according to the present invention;

도 2는 본 발명에 따른 기지국 상호간의 억세스 핸드오프 처리 흐름도,2 is a flowchart illustrating an access handoff process between base stations according to the present invention;

도 3은 본 발명에 따른 기지국 내의 억세스 프로브 핸드오프 처리 흐름도,3 is a flowchart of an access probe handoff process in a base station according to the present invention;

도 4는 본 발명에 따른 기지국 상호간의 억세스 프로브 핸드오프 처리 흐름도.4 is a flowchart of an access probe handoff process between base stations according to the present invention;

＜도면의 주요 부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>

10 : 이동국 20, 60 : 기지국10: mobile station 20, 60: base station

21, 61 : CSM 22, 62 : BCP21, 61: CSM 22, 62: BCP

30 :TSB 40 : CCP30: TSB 40: CCP

50 : PCX50: PCX

이와 같은 목적을 달성하기 위한 본 발명에 따른 셀룰러 이동통신 시스템의 억세스 핸드오프 방법의 특징은, 이동국이 발/착호를 송신하고 호가 소통되기 전에 경계면을 이동함으로써 발생하는 핸드오프시에, 이동국에서 수신된 기지국의 발신 메시지(origination message) 중에서 파일럿 오프셋(pilot offset)과 파일럿 세기(pilot strength) 등을 분석하여 이동국의 이동 경로를 예측하고, 호가 소통되기 전에 발생하는 핸드오프에 대해 기지국의 자원을 할당하여 이동국 응답 메시지(BS_ACK message) 또는 채널 할당 메시지(Channel Assign message)를 이동국에 송신함으로써 호소통율을 향상시킨다.A feature of the access handoff method of the cellular mobile communication system according to the present invention for achieving the above object is that the mobile station receives at the mobile station at the time of handoff caused by the mobile station transmitting a call / call and moving the boundary before the call is communicated. Analyze the pilot offset and pilot strength from the origination message of the base station to predict the mobile station's movement path, and allocate the base station's resources to the handoff that occurs before the call is communicated The call rate is improved by transmitting a BS_ACK message or a Channel Assign message to the mobile station.

본 발명에서 설명하고 있는 억세스 핸드오프(access handoff)는, 이동국이 발/착호를 송신하고, 호가 소통되기 전에 경계면을 이동함으로써 발생하는 핸드오프를 말하며, 이 억세스 핸드오프는 크게 억세스 핸드오프와 억세스 프로브 핸드오프(access probe handoff)로 분류할 수 있다.The access handoff described in the present invention refers to a handoff that occurs when a mobile station transmits an incoming / outgoing call and moves a boundary before the call is communicated. This access handoff is largely an access handoff and an access. It may be classified as an access probe handoff.

억세스 핸드오프는 이동국이 호출 응답 부상태(Page Response Substate)나 이동국 발신시도 부상태(Mobile Station Origination Attempt Substate)에서 접속채널(Access Channel)과 연관된 가장 양호한 파일럿 세기(Pilot Strength)의 호출 채널(Paging Channel)을 수신하기 위해 이동국으로부터 응답을 기다리는 동안 또는 이동국으로 응답에 대한 송신을 하기 전에 발생하는 핸드오프이다.Access handoff is the paging of the best pilot strength associated with the access channel in the page response substate or mobile station origination attempt substate. A handoff that occurs while waiting for a response from a mobile station to receive a channel or before sending a response to the mobile station.

또한, 이 억세스 핸드오프에는 기지국내에서 확장 채널(Extended Channel)을 할당하여 호를 소통시키는 기지국내 억세스 핸드오프와, 2개 이상의 기지국에 채널을 할당하여 호를 소통시키는 기지국간 억세스 핸드오프와, 그리고 기지국내와 기지국간이 혼합된 억세스 핸드오프가 있다.In addition, this access handoff includes an intra-base station access handoff for allocating an extended channel within the base station to communicate with the call, an inter-base station access handoff for allocating channels to two or more base stations for communicating the call; There is also a mixed access handoff between base stations and base stations.

억세스 프로브 핸드오프는 이동국이 호출 응답 부상태에서 접속 시도(Access Attempt)를 수행하는 동안 발생하는 핸드오프이다. 이동국이 발신호(Origination Call)에 대해 이동국 응답 메시지(BS_ACK message)를 받지 못하여 발신호를 다시 보내는 것으로, 이동국은 셋업 중에 다시 수신한 발신호에 대해 이동국 응답 메시지를 주는 것을 제외하고, 억세스 핸드오프와 동일한 제어를 수행한다.An access probe handoff is a handoff that occurs while a mobile station performs an access attempt in a call answer substate. The mobile station does not receive a BS_ACK message for an origination call and sends an outgoing signal again, where the mobile station gives an access handoff except for giving a mobile station response message for the originating signal received again during setup. Perform the same control as

이하, 본 발명에 따른 셀룰러 이동통신 시스템의 억세스 핸드오프 방법의 바람직한 실시예를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, a preferred embodiment of an access handoff method of a cellular mobile communication system according to the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 기지국 내의 억세스 핸드오프 처리 흐름도이다.1 is a flowchart of an access handoff process in a base station according to the present invention.

이에 의하면, 먼저 이동국(10)은 기지국(20)의 CSM(21)에 발신(Origination), 호출 응답(Page response) 등을 포함하는 Access Message를 전송한다(a). 기지국(20)의 CSM(21)은 BCP(22)에게 Access Message를 전송하고, BCP(22)는 Access Message에서 FIRST_IS_ACTIVE, FIRST_IS_PTA, PILOT_STRENGTH, ACCESS_ATTEMPTED, ACCESS_H/O 필드를 분석한다(b).According to this, first, the mobile station 10 transmits an access message including an origination, a page response, and the like to the CSM 21 of the base station 20 (a). The CSM 21 of the base station 20 transmits an Access Message to the BCP 22, and the BCP 22 analyzes the FIRST_IS_ACTIVE, FIRST_IS_PTA, PILOT_STRENGTH, ACCESS_ATTEMPTED, and ACCESS_H / O fields in the Access Message (b).

또한, BCP(22)는 ACCESS_H/O를 분석하여 CSM(21)에게 pc_mob_order 메시지를 전송하고 기지국(20) 자원을 할당한다(c). CSM(21)은 이동국(10)에게 bs_ack_order 메시지를 전송하고 이동국(10)은 Access Message 송신을 중지한다(d). BCP(22)는 CCP(40)에게 mob_orig_msg에 ACCESS_H/O 정보를 포함하여 전송한다(e).In addition, the BCP 22 analyzes the ACCESS_H / O, transmits a pc_mob_order message to the CSM 21, and allocates the base station 20 resources (c). The CSM 21 sends a bs_ack_order message to the mobile station 10 and the mobile station 10 stops transmitting the Access Message (d). The BCP 22 sends the CCP 40 including ACCESS_H / O information in mob_orig_msg (e).

CCP(40)는 PCX(50)와 call setup과정을 수행한다(f). CCP(40)는 BCP(22)에게 Channel Assign Request 메시지를 전송한다(g). BCP(22)는 CSM(21)에게 Traffic Channel Assign 메시지를 전송한다(h).CCP 40 performs a call setup process with PCX 50 (f). CCP 40 transmits a Channel Assign Request message to BCP 22 (g). The BCP 22 transmits a Traffic Channel Assign message to the CSM 21 (h).

CSM(21)은 Forward Null Traffic을 전송한다(i). CSM(21)은 Traffic Channel이 동작되면 BCP(22)에게 Call Status 메시지를 전송한다(j). BCP(22)는 ACCESS_H/O 정보를 사용하여 CSM(21)에게 Extended Channel Assign메시지를 전송한다(k).The CSM 21 transmits forward null traffic (i). The CSM 21 transmits a Call Status message to the BCP 22 when the Traffic Channel is operated (j). The BCP 22 transmits an Extended Channel Assign message to the CSM 21 using the ACCESS_H / O information (k).

CSM(21)은 Paging Channel로 Extended Channel Assign 메시지를 전송한다(l). CSM(21)은 Extended Channel Assign 메시지를 전송 후 BCP(22)에게 OTA_Tx 메시지를 전송한다(m). BCP(22)는 기지국 자원 할당 정보와 ACCESS H/O 정보를 CCP(40)에게 Channel Assign Complete 메시지를 전송한다(n).The CSM 21 transmits an Extended Channel Assign message to the paging channel (l). The CSM 21 transmits an OTA_Tx message to the BCP 22 after transmitting the Extended Channel Assign message (m). The BCP 22 transmits a Channel Assign Complete message to the CCP 40 with base station resource allocation information and ACCESS H / O information (n).

CCP(40)는 TSB(30)에게 ACCESS H/O 정보를 포함한 vs_tc메시지를 전송한다(o). TSB(30)는 CSM(21)에게 TIME_SYNC 메시지를 전송한다(p). CSM(21)은 TSB(30)에게 TIME_SYNC 메시지를 전송한다(q).The CCP 40 transmits a vs_tc message including ACCESS H / O information to the TSB 30 (o). TSB 30 transmits a TIME_SYNC message to CSM 21 (p). The CSM 21 transmits a TIME_SYNC message to the TSB 30 (q).

이동국(10)은 CSM(21)에 Reverse Traffic Preamble을 전송한다(r). CSM(21)은 mobile acquire control 메시지를 TSB(30)에게 전송한다(s). CSM(21)은 기지국(10) call setup이 되었음을 알리는 call_status 메시지를 BCP(22)에게 전송한다(t).The mobile station 10 transmits a reverse traffic preamble to the CSM 21 (r). The CSM 21 transmits a mobile acquire control message to the TSB 30 (s). The CSM 21 transmits a call_status message to the BCP 22 indicating that the base station 10 call setup has been performed (t).

TSB(30)와 이동국(10)은 bs_ack_order와 ms_ack_order 메시지를 전송한다(u). 이동국(10)은 CSM(21)에 Reverse Null Traffic을 전송한다(v). TSB(30)와 이동국(10)은 service option negotiation을 수행한다(w).The TSB 30 and the mobile station 10 transmit bs_ack_order and ms_ack_order messages (u). The mobile station 10 transmits reverse null traffic to the CSM 21 (v). TSB 30 and mobile station 10 perform service option negotiation (w).

TSB(30)는 CCP(40)에게 mobile confirm 메시지를 전송한다(x). CCP(40)는 PCX(50)와 call connect과정을 수행한다(y). CCP(40)는 TSB(30)에게 call connect 메시지를 전송한다(z).The TSB 30 transmits a mobile confirm message to the CCP 40 (x). The CCP 40 performs a call connect process with the PCX 50 (y). CCP 40 transmits a call connect message to TSB 30 (z).

도 2는 본 발명에 따른 기지국 상호간의 억세스 핸드오프 처리 흐름도이다.2 is a flowchart of an access handoff process between base stations according to the present invention.

도시된 바와 같이, 이동국(10)은 기지국(20)의 CSM(21)에 발신(Origination), 호출 응답(Page response) 등을 포함하는 Access Message를 전송한다(a). 기지국(20)의 CSM(21)은 BCP(22)에게 Access Message를 전송하고, BCP(22)는 Access Message에서 FIRST_IS_ACTIVE, FIRST_IS_PTA, PILOT_STRENGTH, ACCESS_ATTEMPTED, ACCESS_H/O 필드를 분석한다(b).As shown, the mobile station 10 transmits an Access Message including Origination, Page Response, etc. to the CSM 21 of the base station 20 (a). The CSM 21 of the base station 20 transmits an Access Message to the BCP 22, and the BCP 22 analyzes the FIRST_IS_ACTIVE, FIRST_IS_PTA, PILOT_STRENGTH, ACCESS_ATTEMPTED, and ACCESS_H / O fields in the Access Message (b).

또한, BCP(22)는 ACCESS_H/O를 분석하여 CSM(21)에게 pc_mob_order 메시지를 전송하고 기지국(20) 자원을 할당한다(c). CSM(21)은 이동국(10)에게 bs_ack_order 메시지를 전송하고 이동국(10)은 Access Message 송신을 중지한다(d). BCP(22)는 CCP(40)에게 mob_orig_msg에 ACCESS_H/O 정보를 포함하여 전송한다(e).In addition, the BCP 22 analyzes the ACCESS_H / O, transmits a pc_mob_order message to the CSM 21, and allocates the base station 20 resources (c). The CSM 21 sends a bs_ack_order message to the mobile station 10 and the mobile station 10 stops transmitting the Access Message (d). The BCP 22 sends the CCP 40 including ACCESS_H / O information in mob_orig_msg (e).

CCP(40)는 PCX(50)와 call setup과정을 수행한다(f). CCP(40)는 BCP(22)에게 Channel Assign Request 메시지를 전송한다(g). 또한, CCP(40)는 BCP(22)에서 수신한 Access_H/O 정보를 분석하여 Target BCP(62)에게 Channel Assign Request 메시지를 분석한다(g').CCP 40 performs a call setup process with PCX 50 (f). CCP 40 transmits a Channel Assign Request message to BCP 22 (g). In addition, the CCP 40 analyzes the Access_H / O information received from the BCP 22 and analyzes the Channel Assign Request message to the target BCP 62 (g ').

BCP(22)(62)는 CSM(21)(61)에게 Traffic Channel Assign 메시지를 전송한다(h)(h'). CSM(21)은 Forward Null Traffic을 전송한다(i)(i'). CSM(21)(61)은 Traffic Channel이 동작되면 BCP(22)(62)에게 Call Status 메시지를 전송한다(j)(j'). BCP(22)(62)는 CSM(21)(61)에게 Channel Assign메시지를 전송한다(k)(k').The BCP 22, 62 sends a Traffic Channel Assign message to the CSM 21, 61 (h) (h '). The CSM 21 transmits Forward Null Traffic (i) (i '). The CSM 21 and 61 transmit a Call Status message to the BCP 22 and 62 when the Traffic Channel is operated (j) (j '). The BCP 22 or 62 transmits a Channel Assign message to the CSM 21 and 61 (k) (k ').

CSM(21)(61)은 Paging Channel로 Channel Assign 메시지를 전송한다(l)(l'). CSM(21)(61)은 Channel Assign 메시지를 전송 후 BCP(22)(62)에게 OTA_Tx 메시지를 전송한다(m)(m'). BCP(22)(62)는 기지국 자원 할당 정보와 ACCESS H/O 정보를 CCP(40)에게 Channel Assign Complete 메시지를 전송한다(n)(n').The CSM 21 and 61 transmit a channel assign message to the paging channel (l) (l '). The CSM 21 and 61 transmit an OTA_Tx message to the BCP 22 and 62 after transmitting the Channel Assign message (m) (m '). The BCP 22 or 62 transmits a Channel Assign Complete message to the CCP 40 with base station resource allocation information and ACCESS H / O information (n) (n ').

CCP(40)는 TSB(30)에게 ACCESS H/O 정보를 포함한 vs_tc메시지를 전송한다(o)(o'). TSB(30)는 CSM(21)(61)에게 TIME_SYNC 메시지를 전송한다(p)(p'). CSM(21)(61)은 TSB(30)에게 TIME_SYNC 메시지를 전송한다(q)(q').The CCP 40 transmits a vs_tc message including ACCESS H / O information to the TSB 30 (o) (o '). TSB 30 sends a TIME_SYNC message to CSM 21 (61) (p) (p '). CSM 21 and 61 send a TIME_SYNC message to TSB 30 (q) (q ').

이동국(10)은 CSM(21)(61)에 Reverse Traffic Preamble을 전송한다(r)(r'). CSM(21)(61)은 mobile acquire control 메시지를 TSB(30)에게 전송하고, mobile not acquire시 call을 release한다(s)(s'). CSM(21)(61)은 기지국(10) call setup이 되었음을 알리는 call_status 메시지를 BCP(22)(62)에게 전송한다(t)(t').The mobile station 10 transmits a Reverse Traffic Preamble to the CSM 21 and 61 (r) (r '). The CSM 21 and 61 transmit a mobile acquire control message to the TSB 30, and release the call at mobile not acquire (s) (s'). The CSM 21 and 61 transmit a call_status message to the BCP 22 and 62 indicating that the base station 10 call setup has been performed (t) (t ').

TSB(30)와 이동국(10)은 bs_ack_order와 ms_ack_order 메시지를 전송한다(u). 이동국(10)은 CSM(21)(61)에 Reverse Null Traffic을 전송한다(v). TSB(30)와 이동국(10)은 service option negotiation을 수행한다(w).The TSB 30 and the mobile station 10 transmit bs_ack_order and ms_ack_order messages (u). The mobile station 10 transmits Reverse Null Traffic to the CSM 21 and 61 (v). TSB 30 and mobile station 10 perform service option negotiation (w).

TSB(30)는 CCP(40)에게 mobile confirm 메시지를 전송한다(x). CCP(40)는 PCX(50)와 call connect과정을 수행한다(y). CCP(40)는 TSB(30)에게 call connect 메시지를 전송한다(z).The TSB 30 transmits a mobile confirm message to the CCP 40 (x). The CCP 40 performs a call connect process with the PCX 50 (y). CCP 40 transmits a call connect message to TSB 30 (z).

도 3은 본 발명에 따른 기지국 내의 억세스 프로브 핸드오프 처리 흐름도이다.3 is a flowchart of an access probe handoff process in a base station according to the present invention.

도시된 바와 같이, 이동국(10)은 기지국(20)의 CSM(21)에 발신(Origination), 호출 응답(Page response) 등을 포함하는 Access Message를 전송한다(a)(a'). 기지국(20)의 CSM(21)은 BCP(22)에게 Access Message를 전송하고, BCP(22)는 Access Message에서 FIRST_IS_ACTIVE, FIRST_IS_PTA, PILOT_STRENGTH, ACCESS_ATTEMPTED, ACCESS_H/O 필드를 분석하고, ESN과 IMSI를 이용하여 이 메시지가 재전송된 메시지인가를 판단한다(b)(b').As shown, the mobile station 10 transmits an access message including origination, page response, etc. to the CSM 21 of the base station 20 (a) (a '). The CSM 21 of the base station 20 transmits an Access Message to the BCP 22, and the BCP 22 analyzes the FIRST_IS_ACTIVE, FIRST_IS_PTA, PILOT_STRENGTH, ACCESS_ATTEMPTED, ACCESS_H / O fields in the Access Message, and uses the ESN and IMSI. It is determined whether the message is a retransmitted message (b) (b ').

또한, BCP(22)는 ACCESS_H/O를 분석하여 CSM(21)에게 pc_mob_order 메시지를 전송하고 기지국(20) 자원을 할당한다(c)(c'). CSM(21)은 이동국(10)에게 bs_ack_order 메시지를 전송하고 이동국(10)은 Access Message 송신을 중지한다(d)(d'). BCP(22)는 CCP(40)에게 mob_orig_msg에 ACCESS_H/O 정보를 포함하여 전송한다(e).In addition, the BCP 22 analyzes the ACCESS_H / O, transmits a pc_mob_order message to the CSM 21, and allocates the base station 20 resources (c) (c '). The CSM 21 sends a bs_ack_order message to the mobile station 10 and the mobile station 10 stops transmitting the Access Message (d) (d '). The BCP 22 sends the CCP 40 including ACCESS_H / O information in mob_orig_msg (e).

CCP(40)는 PCX(50)와 call setup과정을 수행한다(f). CCP(40)는 BCP(22)에게 Channel Assign Request 메시지를 전송한다(g). BCP(22)는 CSM(21)에게 Traffic Channel Assign 메시지를 전송한다(h).CCP 40 performs a call setup process with PCX 50 (f). CCP 40 transmits a Channel Assign Request message to BCP 22 (g). The BCP 22 transmits a Traffic Channel Assign message to the CSM 21 (h).

CSM(21)은 Forward Null Traffic을 전송한다(i). CSM(21)은 Traffic Channel이 동작되면 BCP(22)에게 Call Status 메시지를 전송한다(j). BCP(22)는 ACCESS_H/O 정보를 사용하여 CSM(21)에게 Extended Channel Assign메시지를 전송한다(k).The CSM 21 transmits forward null traffic (i). The CSM 21 transmits a Call Status message to the BCP 22 when the Traffic Channel is operated (j). The BCP 22 transmits an Extended Channel Assign message to the CSM 21 using the ACCESS_H / O information (k).

CSM(21)은 Paging Channel로 Extended Channel Assign 메시지를 전송한다(l). CSM(21)은 Extended Channel Assign 메시지를 전송 후 BCP(22)에게 OTA_Tx 메시지를 전송한다(m). BCP(22)는 기지국 자원 할당 정보와 ACCESS H/O 정보를 CCP(40)에게 Channel Assign Complete 메시지를 전송한다(n).The CSM 21 transmits an Extended Channel Assign message to the paging channel (l). The CSM 21 transmits an OTA_Tx message to the BCP 22 after transmitting the Extended Channel Assign message (m). The BCP 22 transmits a Channel Assign Complete message to the CCP 40 with base station resource allocation information and ACCESS H / O information (n).

CCP(40)는 TSB(30)에게 ACCESS H/O 정보를 포함한 vs_tc메시지를 전송한다(o). TSB(30)는 CSM(21)에게 TIME_SYNC 메시지를 전송한다(p). CSM(21)은 TSB(30)에게 TIME_SYNC 메시지를 전송한다(q).The CCP 40 transmits a vs_tc message including ACCESS H / O information to the TSB 30 (o). TSB 30 transmits a TIME_SYNC message to CSM 21 (p). The CSM 21 transmits a TIME_SYNC message to the TSB 30 (q).

이동국(10)은 CSM(21)에 Reverse Traffic Preamble을 전송한다(r). CSM(21)은 mobile acquire control 메시지를 TSB(30)에게 전송한다(s). CSM(21)은 기지국(10) call setup이 되었음을 알리는 call_status 메시지를 BCP(22)에게 전송한다(t).The mobile station 10 transmits a reverse traffic preamble to the CSM 21 (r). The CSM 21 transmits a mobile acquire control message to the TSB 30 (s). The CSM 21 transmits a call_status message to the BCP 22 indicating that the base station 10 call setup has been performed (t).

TSB(30)와 이동국(10)은 bs_ack_order와 ms_ack_order 메시지를 전송한다(u). 이동국(10)은 CSM(21)에 Reverse Null Traffic을 전송한다(v). TSB(30)와 이동국(10)은 service option negotiation을 수행한다(w).The TSB 30 and the mobile station 10 transmit bs_ack_order and ms_ack_order messages (u). The mobile station 10 transmits reverse null traffic to the CSM 21 (v). TSB 30 and mobile station 10 perform service option negotiation (w).

TSB(30)는 CCP(40)에게 mobile confirm 메시지를 전송한다(x). CCP(40)는 PCX(50)와 call connect과정을 수행한다(y). CCP(40)는 TSB(30)에게 call connect 메시지를 전송한다(z).The TSB 30 transmits a mobile confirm message to the CCP 40 (x). The CCP 40 performs a call connect process with the PCX 50 (y). CCP 40 transmits a call connect message to TSB 30 (z).

도 4는 본 발명에 따른 기지국 상호간의 억세스 프로브 핸드오프 처리 흐름도이다.4 is a flowchart illustrating an access probe handoff process between base stations according to the present invention.

도시된 바와 같이, 이동국(10)은 기지국(20)(60)의 CSM(21)(61)에 발신(Origination), 호출 응답(Page response) 등을 포함하는 Access Message를 전송한다(a)(a'). 기지국(20)(60)의 CSM(21)(61)은 BCP(22)(62)에게 Access Message를 전송하고, BCP(22)(62)는 Access Message에서 FIRST_IS_ACTIVE, FIRST_IS_PTA, PILOT_STRENGTH, ACCESS_ATTEMPTED, ACCESS_H/O 필드를 분석한다(b)(b').As shown, the mobile station 10 transmits an access message including origination, page response, etc. to the CSM 21, 61 of the base station 20, 60 (a) ( a '). The CSM 21, 61 of the base station 20, 60 sends an Access Message to the BCP 22, 62, and the BCP 22, 62 sends FIRST_IS_ACTIVE, FIRST_IS_PTA, PILOT_STRENGTH, ACCESS_ATTEMPTED, ACCESS_H in the Access Message. Analyze the / O field (b) (b ').

또한, BCP(22)(62)는 ACCESS_H/O를 분석하여 CSM(21)(61)에게 pc_mob_order 메시지를 전송하고 기지국(20) 자원을 할당한다(c)(c'). CSM(21)(61)은 이동국(10)에게 bs_ack_order 메시지를 전송하고 이동국(10)은 Access Message 송신을 중지한다(d)(d'). BCP(22)는 CCP(40)에게 mob_orig_msg에 ACCESS_H/O 정보를 포함하여 전송한다(e).In addition, the BCP 22 (62) analyzes the ACCESS_H / O, transmits the pc_mob_order message to the CSM 21 (61), and allocates the base station 20 resources (c) (c '). CSM 21 (61) sends a bs_ack_order message to mobile station 10, and mobile station 10 stops transmitting Access Message (d) (d '). The BCP 22 sends the CCP 40 including ACCESS_H / O information in mob_orig_msg (e).

CCP(40)는 PCX(50)와 call setup과정을 수행한다(f). CCP(40)는 BCP(22)에게 Channel Assign Request 메시지를 전송한다(g). 또한, CCP(40)는 BCP(22)에서 수신한 Access_H/O 정보를 분석하여 Target BCP(62)에게 Channel Assign Request 메시지를 분석하고, Target BCP(62)가 일정시간동안 Channel Assign Request 메시지를 수신하지 못하면 Target BCP(62)는 CCP(40)에게 mob_orig_msg를 전송하여 정상적인 Call Processing을 수행한다(g').CCP 40 performs a call setup process with PCX 50 (f). CCP 40 transmits a Channel Assign Request message to BCP 22 (g). In addition, the CCP 40 analyzes the Access_H / O information received from the BCP 22 to analyze the Channel Assign Request message to the target BCP 62, and the Target BCP 62 receives the Channel Assign Request message for a predetermined time. If not, the Target BCP 62 transmits mob_orig_msg to the CCP 40 to perform normal call processing (g ').

BCP(22)(62)는 CSM(21)(61)에게 Traffic Channel Assign 메시지를 전송한다(h)(h'). CSM(21)(61)은 Forward Null Traffic을 전송한다(i)(i'). CSM(21)(61)은 Traffic Channel이 동작되면 BCP(22)(62)에게 Call Status 메시지를 전송한다(j)(j'). BCP(22)(62)는 CSM(21)(61)에게 Channel Assign메시지를 전송한다(k)(k').The BCP 22, 62 sends a Traffic Channel Assign message to the CSM 21, 61 (h) (h '). CSM 21 (61) transmits Forward Null Traffic (i) (i '). The CSM 21 and 61 transmit a Call Status message to the BCP 22 and 62 when the Traffic Channel is operated (j) (j '). The BCP 22 or 62 transmits a Channel Assign message to the CSM 21 and 61 (k) (k ').

CSM(21)(61)은 Paging Channel로 Channel Assign 메시지를 전송한다(l)(l'). CSM(21)(61)은 Channel Assign 메시지를 전송 후 BCP(22)(62)에게 OTA_Tx 메시지를 전송한다(m)(m'). BCP(22)(62)는 기지국 자원 할당 정보와 ACCESS H/O 정보를 CCP(40)에게 Channel Assign Complete 메시지를 전송한다(n)(n').The CSM 21 and 61 transmit a channel assign message to the paging channel (l) (l '). The CSM 21 and 61 transmit an OTA_Tx message to the BCP 22 and 62 after transmitting the Channel Assign message (m) (m '). The BCP 22 or 62 transmits a Channel Assign Complete message to the CCP 40 with base station resource allocation information and ACCESS H / O information (n) (n ').

CCP(40)는 TSB(30)에게 ACCESS H/O 정보를 포함한 vs_tc메시지를 전송한다(o)(o'). TSB(30)는 CSM(21)(61)에게 TIME_SYNC 메시지를 전송한다(p)(p'). CSM(21)(61)은 TSB(30)에게 TIME_SYNC 메시지를 전송한다(q)(q').The CCP 40 transmits a vs_tc message including ACCESS H / O information to the TSB 30 (o) (o '). TSB 30 sends a TIME_SYNC message to CSM 21 (61) (p) (p '). CSM 21 and 61 send a TIME_SYNC message to TSB 30 (q) (q ').

이동국(10)은 CSM(21)(61)에 Reverse Traffic Preamble을 전송한다(r)(r'). CSM(21)(61)은 mobile acquire control 메시지를 TSB(30)에게 전송하고, mobile not acquire시 call을 release한다(s)(s'). CSM(21)(61)은 기지국(10) call setup이 되었음을 알리는 call_status 메시지를 BCP(22)(62)에게 전송한다(t)(t').The mobile station 10 transmits a Reverse Traffic Preamble to the CSM 21 and 61 (r) (r '). The CSM 21 and 61 transmit a mobile acquire control message to the TSB 30, and release the call at mobile not acquire (s) (s'). The CSM 21 and 61 transmit a call_status message to the BCP 22 and 62 indicating that the base station 10 call setup has been performed (t) (t ').

TSB(30)와 이동국(10)은 bs_ack_order와 ms_ack_order 메시지를 전송한다(u). 이동국(10)은 CSM(21)(61)에 Reverse Null Traffic을 전송한다(v). TSB(30)와 이동국(10)은 service option negotiation을 수행한다(w).The TSB 30 and the mobile station 10 transmit bs_ack_order and ms_ack_order messages (u). The mobile station 10 transmits Reverse Null Traffic to the CSM 21 and 61 (v). TSB 30 and mobile station 10 perform service option negotiation (w).

TSB(30)는 CCP(40)에게 mobile confirm 메시지를 전송한다(x). CCP(40)는 PCX(50)와 call connect과정을 수행한다(y). CCP(40)는 TSB(30)에게 call connect 메시지를 전송한다(z).The TSB 30 transmits a mobile confirm message to the CCP 40 (x). The CCP 40 performs a call connect process with the PCX 50 (y). CCP 40 transmits a call connect message to TSB 30 (z).

이상 설명한 바와 같이 본 발명에 따른 셀룰러 이동통신 시스템의 억세스 핸드오프 방법에 의하면, 이동국이 발/착호를 송신하고 호가 소통되기 전에 경계면을 이동함으로써 발생하는 핸드오프시에, 이동국에서 수신된 기지국의 발신 메시지(origination message) 중에서 파일럿 오프셋(pilot offset)과 파일럿 세기(pilot strength) 등을 분석하여 이동국의 이동 경로를 예측하고, 호가 소통되기 전에 발생하는 핸드오프에 대해 기지국의 자원을 할당하여 이동국 응답 메시지(BS_ACK message) 또는 채널 할당 메시지(Channel Assign message)를 이동국에 송신함으로써 호소통율을 향상시키게 되는 효과가 있다.As described above, according to the access handoff method of the cellular mobile communication system according to the present invention, an outgoing call of a base station received at a mobile station in a handoff caused by a mobile station transmitting a call / call and moving a boundary before a call is communicated The mobile station response message is analyzed by analyzing the pilot offset and pilot strength among the origination messages, and estimating the mobile path of the mobile station, and allocating the resources of the base station to the handoff occurring before the call is communicated. The call rate can be improved by transmitting a BS_ACK message or a Channel Assign message to the mobile station.

Claims (2)

이동국이 발/착호를 송신하고 호가 소통되기 전에 경계면을 이동함으로써 발생하는 억세스 핸드오프시에, 상기 이동국에서 수신된 기지국의 발신 메시지(origination message) 중에서 파일럿 오프셋(pilot offset)과 파일럿 세기(pilot strength) 등을 분석하여 상기 이동국의 이동 경로를 예측하고, 호가 소통되기 전에 발생하는 핸드오프에 대해 상기 기지국의 자원을 할당하여 이동국 응답 메시지(BS_ACK message) 또는 채널 할당 메시지(Channel Assign message)를 상기 이동국에 송신함으로써 호소통율을 향상시키도록 하는 것을 특징으로 하는 셀룰러 이동통신 시스템의 억세스 핸드오프 방법.In an access handoff caused by a mobile station transmitting a call / call and moving the boundary before the call is communicated, a pilot offset and pilot strength among the origination messages of the base station received at the mobile station. Predicts a mobile path of the mobile station, allocates resources of the base station to a handoff occurring before a call is communicated, and sends a mobile station response message (BS_ACK message) or a channel assign message (Channel Assign message) to the mobile station. A method of access handoff in a cellular mobile communication system, characterized in that for improving the call rate by transmitting to a mobile station. 제 1항에 있어서, 상기 이동국은 상기 기지국의 CSM에 Access Message를 전송하고, 상기 CSM은 BCP에게 Access Message를 전송하고, 상기 BCP는 Access Message에서 FIRST_IS_ACTIVE, FIRST_IS_PTA, PILOT_STRENGTH, ACCESS_ATTEMPTED, ACCESS_H/O 필드를 분석하고 상기 CSM에게 pc_mob_order 메시지를 전송하여 기지국 자원을 할당하고, 상기 CSM은 상기 이동국에게 bs_ack_order 메시지를 전송하고, 상기 이동국은 Access Message 송신을 중지하고, 상기 BCP는 CCP에게 mob_orig_msg에 ACCESS_H/O 정보를 포함하여 전송하고, 상기 CCP는 PCX와 call setup과정을 수행하고, 상기 CCP는 상기 BCP에게 Channel Assign Request 메시지를 전송하고, 상기 BCP는 CSM에게 Traffic Channel Assign 메시지를 전송하고, 상기 CSM은 Forward Null Traffic을 전송하고, 상기 CSM은 Traffic Channel이 동작되면 상기 BCP에게 Call Status 메시지를 전송하고, 상기 BCP는 ACCESS_H/O 정보를 사용하여 상기 CSM에게 Extended Channel Assign메시지를 전송하고, 상기 CSM은 Paging Channel로 Extended Channel Assign 메시지를 전송하고, 상기 CSM은 Extended Channel Assign 메시지를 전송 후 상기 BCP에게 OTA_Tx 메시지를 전송하고, 상기 BCP는 기지국 자원 할당 정보와 ACCESS H/O 정보를 상기 CCP에게 Channel Assign Complete 메시지를 전송하고, 상기 CCP는 TSB에게 ACCESS H/O 정보를 포함한 vs_tc메시지를 전송하고, TSB는 상기 CSM에게 TIME_SYNC 메시지를 전송하고, 상기 CSM은 상기 TSB에게 TIME_SYNC 메시지를 전송하고, 상기 이동국은 상기 CSM에 Reverse Traffic Preamble을 전송하고, 상기 CSM은 mobile acquire control 메시지를 상기 TSB에게 전송하고, CSM은 기지국 call setup이 되었음을 알리는 call_status 메시지를 BCP에게 전송하고, 상기 TSB와 상기 이동국은 bs_ack_order와 ms_ack_order 메시지를 전송하고, 상기 이동국은 상기 CSM에 Reverse Null Traffic을 전송하고, 상기 TSB와 상기 이동국은 service option negotiation을 수행하고, 상기 TSB는 상기 CCP에게 mobile confirm 메시지를 전송하고, 상기 CCP는 상기 PCX와 call connect과정을 수행하고, 상기 CCP는 상기 TSB에게 call connect 메시지를 전송하는 것을 특징으로 하는 셀룰러 이동통신 시스템의 억세스 핸드오프 방법.The mobile station of claim 1, wherein the mobile station transmits an access message to a CSM of the base station, the CSM transmits an access message to a BCP, and the BCP transmits an FIRST_IS_ACTIVE, FIRST_IS_PTA, PILOT_STRENGTH, ACCESS_ATTEMPTED, and ACCESS_H / O fields in the Access Message. Analyzes and allocates base station resources by sending a pc_mob_order message to the CSM, the CSM sends a bs_ack_order message to the mobile station, the mobile station stops transmitting an Access Message, and the BCP sends ACCESS_H / O information to the CCP in mob_orig_msg. And the CCP performs a call setup process with the PCX, the CCP sends a Channel Assign Request message to the BCP, the BCP sends a Traffic Channel Assign message to the CSM, and the CSM forward Null Traffic. The CSM transmits a Call Status message to the BCP when the Traffic Channel is operated, and the BCP sends ACCESS_H / O information. Sends an Extended Channel Assign message to the CSM, the CSM transmits an Extended Channel Assign message to the Paging Channel, the CSM sends an Extended Channel Assign message to the BCP, and then sends an OTA_Tx message to the BCP. The base station resource allocation information and ACCESS H / O information is transmitted to the CCP, the CCP transmits a vs_tc message including the ACCESS H / O information to the TSB, and the TSB transmits a TIME_SYNC message to the CSM. The CSM transmits a TIME_SYNC message to the TSB, the mobile station transmits a Reverse Traffic Preamble to the CSM, the CSM transmits a mobile acquire control message to the TSB, and the CSM calls_status message indicating that a base station call setup has been made. To the BCP, the TSB and the mobile station transmit a bs_ack_order and ms_ack_order message, and the mobile station Transmits Reverse Null Traffic to the CSM, the TSB and the mobile station perform service option negotiation, the TSB sends a mobile confirm message to the CCP, the CCP performs a call connect process with the PCX, The CCP is an access handoff method of a cellular mobile communication system, characterized in that for transmitting a call connect message to the TSB.
KR1019990040091A 1999-09-17 1999-09-17 Access hand-off method of cellular mobile communication system KR100347415B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019990040091A KR100347415B1 (en) 1999-09-17 1999-09-17 Access hand-off method of cellular mobile communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019990040091A KR100347415B1 (en) 1999-09-17 1999-09-17 Access hand-off method of cellular mobile communication system

Publications (2)

Publication Number Publication Date
KR20010028045A true KR20010028045A (en) 2001-04-06
KR100347415B1 KR100347415B1 (en) 2002-08-03

Family

ID=19612027

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019990040091A KR100347415B1 (en) 1999-09-17 1999-09-17 Access hand-off method of cellular mobile communication system

Country Status (1)

Country Link
KR (1) KR100347415B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442137B1 (en) * 2002-06-21 2004-07-30 에스케이 텔레콤주식회사 Multi-Call Method for improving Terminating Call in mobile telecommunicaton network
KR100718443B1 (en) * 2006-06-01 2007-05-14 에스케이 텔레콤주식회사 System and method for access handoff in mobile communication network

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9247467B2 (en) 2005-10-27 2016-01-26 Qualcomm Incorporated Resource allocation during tune-away
US8068835B2 (en) 2005-10-27 2011-11-29 Qualcomm Incorporated Tune-away and cross paging systems and methods

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442137B1 (en) * 2002-06-21 2004-07-30 에스케이 텔레콤주식회사 Multi-Call Method for improving Terminating Call in mobile telecommunicaton network
KR100718443B1 (en) * 2006-06-01 2007-05-14 에스케이 텔레콤주식회사 System and method for access handoff in mobile communication network

Also Published As

Publication number Publication date
KR100347415B1 (en) 2002-08-03

Similar Documents

Publication Publication Date Title
EP0917809B1 (en) Method and apparatus for reliable intersystem handoff in a cdma system
US6438370B1 (en) Location update method and inter core network entity handover method
CA2334654C (en) Location update method and inter core network entity handover method
WO2009045027A2 (en) Method of fast uplink data transmission for handover
US5471644A (en) Method of reducing audio gap in downlink during handoff of cellular radiotelphone
KR100240451B1 (en) Reducing method of continuing hard handoff between base stations
AU731898B2 (en) System and method for registering the location of a mobile station after performing an inter-MSC soft handoff in a cellular system
US20080014968A1 (en) Apparatus and method for providing location information in mobile communication system
WO2001086975A2 (en) Handover method and apparatus for voice group calls in a mobile communications system
KR20040018184A (en) System and method for delivering incoming calls to mobile units in border cells using packet-based links
EP1313340B1 (en) Mobile telecommunications system with improved management of its radio resources
US5386456A (en) Method of reducing audio gap in downlink during handoff of cellular radiotelephone
US6961572B2 (en) Method and apparatus for base-initiated, CDMA-dispatch soft handoff
KR100347415B1 (en) Access hand-off method of cellular mobile communication system
US6788941B2 (en) Method and apparatus for mobile-initiated, CDMA-dispatch soft handoff
KR100345973B1 (en) CDMA mobile telecommunication method and system
KR100754648B1 (en) Hand-over method and system between heterogeneous mobile telecommunication systems
US7099290B2 (en) Method and apparatus for CDMA-dispatch soft handoff
KR100531360B1 (en) Method for hard hand-off in moile communication systems
EP2775777B1 (en) Mobile radio communications device and related method and system
KR100539539B1 (en) Method for Transmitting In-traffic Channel Information in Mobile Communication
KR100329656B1 (en) Method for applying inter-frequency hard hand-off in specific base station
KR100589960B1 (en) Hand Over Method from Asynchronous Mobile Communication Network to Synchronous Mobile Communication Network During Origination Alerting
KR20000033328A (en) Method for controlling switch in performing continuous hand-off between exchanges
KR20040028294A (en) Method for call setup using neighbor communication system in mobile communication system

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20060721

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee