KR20040036966A - Power saving method for mobile communication device - Google Patents

Power saving method for mobile communication device Download PDF

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KR20040036966A
KR20040036966A KR1020020065567A KR20020065567A KR20040036966A KR 20040036966 A KR20040036966 A KR 20040036966A KR 1020020065567 A KR1020020065567 A KR 1020020065567A KR 20020065567 A KR20020065567 A KR 20020065567A KR 20040036966 A KR20040036966 A KR 20040036966A
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South Korea
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cpich
terminal
channel
common pilot
call
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KR1020020065567A
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Korean (ko)
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정유철
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엘지전자 주식회사
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Publication of KR20040036966A publication Critical patent/KR20040036966A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE: A power saving method of a mobile communication terminal is provided to reduce power consumption of a mobile terminal and increase a standby time by transmitting a PI(Paging Indicator) through a CPICH(Common PIlot CHannel). CONSTITUTION: Since a PI is inserted into a frame of a CPICH according to a DRX(Discontinuous Receive) period and then transmitted, a terminal checks the DRX period(S101) and searches the PI from the CPICH(S102). If the PI is set as '1'(S103), the terminal performs a demodulating on a S-CCPCH(Secondary Common Control Physical CHannel) after a certain time elapses, to receive a paging message(S104). Since the CPICH, rather than a PICH which is transmitted at the maximum power, power loss for transmission of the PICH can be reduced and thus a standby time of the terminal can be increased.

Description

이동 통신 단말기의 절전 방법{POWER SAVING METHOD FOR MOBILE COMMUNICATION DEVICE}POWER SAVING METHOD FOR MOBILE COMMUNICATION DEVICE}

본 발명은 이동 통신 단말기의 대기시간을 증가시키기 위한 방법에 관한 것으로, 특히 비동기 방식 이동 통신 단말기에서 호출지시자(PI)를 공통파일럿채널(CPICH)을 통해서 전송함으로써, 단말기의 전력소모를 줄여 대기시간을 증가시킬 수 있도록 하는 이동 통신 단말기의 절전 방법에 관한 것이다.The present invention relates to a method for increasing the waiting time of a mobile communication terminal, and in particular, by transmitting a call indicator (PI) through a common pilot channel (CPICH) in an asynchronous mobile communication terminal, thereby reducing power consumption of the terminal. It relates to a power saving method of a mobile communication terminal to increase the.

일반적인 비동기 방식의 무선채널 구조를 살펴보면, 도1에 도시된 바와 같이 모든 채널의 위상기준을 제공하는 1차 공통파일럿채널과 특정지역에 스포트 빔 안테나의 기능수행을 위한 2차 공통파일럿채널로 구성된 공통파일럿채널(CPICH) 및 도2에 도시된 바와 같이 배터리 소모전력을 줄여 대기시간을 늘릴 수 있는 호출지시채널(PICH)을 가지고 있으며, 이외에도, 랜덤접속채널(PRACH)과 공통파일럿채널(CPICH)의 정보를 제공하는 1차 공통제어채널(P-CCPCH)과, 순방향액세스채널(FACH)과 호출채널(PCH)의 내용을 수행하는 2차 공통제어채널(S-CCPCH)과, 동기정보를 가진 동기채널(SCH) 등을 포함하고 있다.Referring to the general asynchronous wireless channel structure, as shown in FIG. 1, a common common channel consisting of a primary common pilot channel providing a phase reference of all channels and a secondary common pilot channel for performing a function of a spot beam antenna in a specific region is shown. As shown in FIG. 2, the pilot channel (CPICH) and the call instruction channel (PICH) which can increase the standby time by reducing the battery power consumption, in addition to the random access channel (PRACH) and common pilot channel (CPICH) A primary common control channel (P-CCPCH) for providing information, a secondary common control channel (S-CCPCH) for carrying out the contents of a forward access channel (FACH) and a call channel (PCH), and synchronization with synchronization information Channel (SCH) and the like.

여기서, 특히 호출지시채널(PICH)은 비동기 방식 이동 통신 시스템의 효율적인 슬립모드 지원을 위해서 사용되는 것으로, 이를 통해 상위 계층(Layer)에서 불연속 수신(이하 "DRX"라 칭함) 주기의 파라미터 값을 내려 줌으로써, 단말기는 DRX 주기에 따라 호출 메시지를 체크한다.In particular, the call indication channel (PICH) is used to support an efficient sleep mode of an asynchronous mobile communication system. Through this, a parameter value of a discontinuous reception (hereinafter, referred to as "DRX") period is lowered in an upper layer. By doing so, the terminal checks the call message according to the DRX cycle.

예컨대, 특정 단말에 호출이 있을 경우에는 호출지시자(PI)를 '1'로 설정하여 전송하면 그 단말기는 도3에 도시된 바와 같이 소정시간(7860칩(Chip)) 이후에 전송되는 순방향 2차 공통제어채널(S-CCPCH)을 검색하여 페이징 메시지(Paging Message)를 수신한다.For example, if there is a call to a specific terminal, if the call indicator (PI) is set to '1' and transmitted, the terminal is forward secondary transmitted after a predetermined time (7860 chip) as shown in FIG. A common control channel (S-CCPCH) is searched for and receiving a paging message.

다시 말해, 종래에 단말기의 전력소모를 줄이기 위해 이용한 방법은, 동기방식에서 사용하는 고속 페이징 채널(QPCH : Quick Paging Channel)과 비슷한 개념의 채널인 호출지시채널(PICH)을 통해 호출지시자(PI)를 전송하는 방법을 이용한 것으로서, 단말기는 불연속 수신(DRX) 주기에 맞추어서 슬립에서 깨어나호출지시채널(PICH)을 검색하고, 그 단말에 해당하는 호출지시자(PI)를 분석하여 '1'로 설정되어 있을 경우, 소정 시간(7860칩) 후에 그 단말에 해당하는 페이징 메시지를 받기 위해 순방향 2차 공통제어 채널(S-CCPCH)의 검색을 하게 된다.In other words, the conventional method used to reduce the power consumption of the terminal, the call indicator (PI) through the call instruction channel (PICH), which is a channel similar in concept to the quick paging channel (QPCH) used in the synchronous method As a method of transmitting a signal, the terminal wakes up from sleep according to a discontinuous reception (DRX) cycle, searches for a call instruction channel (PICH), analyzes a call indicator (PI) corresponding to the terminal, and is set to '1'. If there is, it searches for a forward secondary common control channel (S-CCPCH) to receive a paging message corresponding to the terminal after a predetermined time (7860 chip).

그런데, 호출지시채널(PICH)은 모든 단말이 호출지시채널(PICH)을 모니터 해야 하기 때문에, 기지국과 단말기와의 거리에 따른 전력제어(Power Control)를 수행하지 않고 무조건 최고 전력 레벨로 송신을 하게 되는데, 비록 불연속 주기지만 호출지시자(PI)를 분석하는 시간(Paging Indication 시간)만큼 전력 손실이 더 발생하는 문제점이 있다.However, since the call instruction channel (PICH) must monitor all the call instruction channel (PICH), the PICH must transmit at the highest power level without performing power control according to the distance between the base station and the terminal. Although there is a discontinuous period, there is a problem in that power loss occurs as much as the time of analyzing the call indicator (Paging Indication time).

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창출한 것으로, 비동기 방식 이동 통신 단말기에서 호출지시자(PI)를 공통파일럿채널(CPICH)을 통해서 전송함으로써, 단말기의 전력소모를 줄여 대기시간을 증가시킬 수 있도록 하는 이동 통신 단말기의 절전 방법을 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above-mentioned problems. In the asynchronous mobile communication terminal, a call indicator (PI) is transmitted through a common pilot channel (CPICH), thereby reducing power consumption of the terminal, and thus waiting time. It is an object of the present invention to provide a power saving method of a mobile communication terminal that can increase the number.

이와 같은 목적을 달성하기 위한 본 발명은, 기지국 시스템에서 불연속 수신(DRX) 주기에 맞춰서 공통파일럿채널(CPICH)의 어느 한 프레임에 전송하고자 하는 호출지시자(PI)를 삽입하여 전송하고, 단말기는 불연속 수신(DRX) 주기에 맞춰서 슬립모드에서 깨어나 공통파일럿채널(CPICH)에서 호출지시자(PI)를 검색하여 페이징 메시지를 수신하도록 이루어진 것을 특징으로 한다.In order to achieve the above object, the present invention inserts and transmits a call indicator (PI) to be transmitted in one frame of a common pilot channel (CPICH) according to a discontinuous reception (DRX) period in a base station system, and the terminal is discontinuous. It wakes up from the sleep mode according to the reception (DRX) period, characterized in that configured to receive the paging message by searching the call indicator (PI) in the common pilot channel (CPICH).

도 1은 종래의 일반적인 공통파일럿채널(CPICH)의 구성을 보인 예시도.1 is an exemplary view showing the configuration of a conventional common pilot channel (CPICH).

도 2는 종래의 호출지시채널(PICH)의 프레임 구성을 보인 예시도.Figure 2 is an exemplary view showing a frame configuration of a conventional call indication channel (PICH).

도 3은 종래의 호출지시채널(PICH)에 의한 페이징 메시지의 수신과정을 설명하기 위한 예시도.3 is an exemplary diagram for explaining a process of receiving a paging message by a conventional call indication channel (PICH).

도 4는 본 발명에 의해 호출지시자(PI)를 포함하는 공통파일럿채널(CPICH)의 구성을 보인 예시도.4 is a diagram illustrating a configuration of a common pilot channel (CPICH) including a call indicator (PI) according to the present invention.

도 5는 본 발명에 따른 호출지시자(PI)를 포함하는 공통파일럿채널(CPICH)의 전송에 의해 페이징 메시지를 수신하는 과정을 보인 순서도.5 is a flowchart illustrating a process of receiving a paging message by transmission of a common pilot channel (CPICH) including a call indicator (PI) according to the present invention.

본 발명은 종래에 호출지시채널(PICH)을 통해 전송하던 호출지시자(PI)를,공통파일럿채널(CPICH)을 통하여 전송함으로써, 호출지시채널(PICH)에 호출지시자(PI)를 포함하여 전송할 경우의 호출지시자(PI) 분석을 수행하기 위해 필요한 시간동안의 전력소모를 줄여 단말기의 대기시간을 증가시킬 수 있도록 하는 특징이 있다.The present invention transmits the call indicator (PI), which was conventionally transmitted through the call indication channel (PICH), by including the call indicator (PI) in the call indication channel (PICH) by transmitting it through the common pilot channel (CPICH). It is possible to increase the standby time of the terminal by reducing the power consumption during the time required to perform the PI analysis.

즉, 종래에는 호출지시채널(PICH)을 이용하여 호출지시자(PI)를 내려주고, 단말기는 불연속 수신(DRX) 주기가 되었을 때 슬립에서 깨어나 호출지시채널(PICH)의 호출지시자(PI)를 통하여 자신에게 온 호출메시지가 있는지를 확인하는 방식으로 동작하였지만, 본 발명에서는 기존의 호출지시채널(PICH) 대신 연속적으로 내려오는 공통파일럿채널(CPICH)에 호출지시자(PI)를 포함하여 전송함으로써 전력소모를 감소시켜 대기시간을 증가시키는 특징이 있다.That is, conventionally, the call indicator (PI) is lowered using the call indication channel (PICH), and the terminal wakes up from the sleep when the discontinuous reception (DRX) cycle is reached through the call indicator (PI) of the call indication channel (PICH). In the present invention, it operates in a manner of checking whether there is a call message. However, in the present invention, power is consumed by transmitting a call indicator (PI) to a common pilot channel (CPICH) that is continuously descended instead of the existing call instruction channel (PICH). It is characterized by increasing the waiting time by reducing.

이하, 본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 설명한다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described.

우선, 도4는 본 발명에 의해 호출지시자(PI)를 포함하는 공통파일럿채널(CPICH)의 구성을 보인 예시도로서, 기본적인 구성은 일반적인 공통파일럿채널(CPICH)의 구성과 큰 차이가 없으며, 다만 도4의 (b)와 같이 수퍼 프레임 중 어느 한 프레임에 호출지시자(PI)를 포함하여 구성한다.First, Figure 4 is an exemplary view showing a configuration of a common pilot channel (CPICH) including a call indicator (PI) by the present invention, the basic configuration is not significantly different from the configuration of a common common pilot channel (CPICH), As shown in (b) of FIG. 4, a call indicator (PI) is included in any one of the super frames.

즉, 도4의 (c)에서와 같이 시스템은 불연속 수신(DRX) 주기에 맞춰서 공통파일럿채널(CPICH)의 어느 한 프레임에 시스템이 보내고자 하는 호출지시자(PI)를 삽입하여 전송하는 것이다.That is, as shown in (c) of FIG. 4, the system inserts and transmits a call indicator (PI) which the system intends to send in one frame of the common pilot channel (CPICH) in accordance with a discontinuous reception (DRX) cycle.

이때, 호출지시자(PI)는 도4의 (d)와 같은 크기(512 ~ 4096 칩)를 갖는 것을 반복하여 포함시키는 것으로, 호출지시자(PI)가 포함되는 프레임의 구성은 도2에도시된 바와 같은 종래의 구성을 그대로 이용할 수 있다. 이로써, 호출지시자(PI)를 공통파일럿채널(CPICH)에 포함하여 전송하여 전송하는 방법은 그 실현에 큰 어려움 없이 적용할 수 있게 된다.At this time, the call indicator (PI) is to include repeatedly having the same size (512 ~ 4096 chips) as shown in Figure 4 (d), the configuration of the frame including the call indicator (PI) is shown in FIG. The same conventional structure can be used as it is. As a result, the method of transmitting and transmitting the call indicator (PI) in the common pilot channel (CPICH) can be applied without great difficulty in the realization thereof.

다음, 도5는 본 발명에 따른 호출지시자(PI)를 포함하는 공통파일럿채널(CPICH)의 전송에 의해 페이징 메시지를 수신하는 과정을 보인 순서도로서, 본 발명에서도 불연속 수신(DRX) 주기에 맞춰 호출지시자(PI)를 공통파일럿채널(CPICH)의 한 프레임으로 삽입하여 전송하므로, 단말기는 종래와 마찬가지로 불연속 수신(DRX) 주기를 체크하여(S101) 공통파일럿채널(CPICH)에서 호출지시자(PI)를 검색한다(S102).Next, FIG. 5 is a flowchart illustrating a process of receiving a paging message by transmission of a common pilot channel (CPICH) including a call indicator (PI) according to the present invention. In the present invention, FIG. 5 is called according to a discontinuous reception (DRX) cycle. Since the indicator (PI) is inserted into one frame of the common pilot channel (CPICH) and transmitted, the terminal checks the discontinuous reception (DRX) cycle as in the prior art (S101) and calls the call indicator (PI) in the common pilot channel (CPICH). Search (S102).

즉, 종래의 경우에는 호출지시채널(PICH)을 검색하여 자신에게 온 호출지시자(PI)를 검색하지만, 본 발명에서는 시스템에서 공통파일럿채널(CPICH)의 데이터 필드에 호출지시자(PI)를 넣어서 전송하므로, 공통파일럿채널(CPICH)에서 호출지시자(PI)를 검색하는 것이다.That is, in the conventional case, the call indicator channel (PICH) is searched for the call indicator (PI) that has come to it, but in the present invention, the call indicator (PI) is inserted into the data field of the common pilot channel (CPICH) in the system and transmitted. Therefore, the PI is searched on the common pilot channel (CPICH).

상기 검색 결과에 따라 호출지시자(PI)가 '1'로 설정되어 있는 경우에는(S103), 소정시간(7860 칩) 경과 후 2차 공통제어 채널(S-CCPCH)의 복조를 수행하여 페이징 메시지를 수신한다(S104).If the call indicator (PI) is set to '1' according to the search result (S103), after a predetermined time (7860 chips), the secondary common control channel (S-CCPCH) is demodulated to generate a paging message. It receives (S104).

상기와 같이 본 발명은 호출지시자(PI)를 전송하기 위해 최대전력으로 전송되는 호출지시채널(PICH)을 사용하지 않고, 공통 파일럿 채널(CPICH)을 이용하기 때문에 호출지시채널(PICH)의 전송을 위한 전력 손실을 줄일 수 있어 단말기의 대기시간이 호출지시채널(PICH)의 사용전보다 더 늘어나게 된다.As described above, the present invention uses the common pilot channel (CPICH) without using the call instruction channel (PICH) transmitted at full power to transmit the call indicator (PI). In this case, the standby time of the terminal is increased more than before using the PICH.

이상에서 설명한 바와 같이 본 발명 이동 통신 단말기의 절전 방법은, 비동기 방식 이동 통신 단말기에서 호출지시자(PI)를 공통파일럿채널(CPICH)을 통해서 전송함으로써, 단말기의 전력소모를 줄여 대기시간을 증가시킬 수 있도록 하는 효과가 있다.As described above, the power saving method of the mobile communication terminal of the present invention can increase the waiting time by reducing the power consumption of the terminal by transmitting the call indicator (PI) through the common pilot channel (CPICH) in the asynchronous mobile communication terminal. It is effective.

또한, 본 발명은 호출지시채널(PICH)을 사용하지 않기 때문에 시스템의 자원할당에 여유가 생기는 효과가 있다.In addition, since the present invention does not use the call indication channel (PICH), the resource allocation of the system has an effect.

Claims (2)

기지국 시스템에서 불연속 수신(DRX) 주기에 맞춰서 공통파일럿채널(CPICH)의 어느 한 프레임에 전송하고자 하는 호출지시자(PI)를 삽입하여 전송하고,The base station system inserts and transmits a call indicator (PI) to be transmitted in one frame of the common pilot channel (CPICH) in accordance with a discontinuous reception (DRX) cycle. 단말기는 불연속 수신(DRX) 주기에 맞춰서 슬립모드에서 깨어나 공통파일럿채널(CPICH)에서 호출지시자(PI)를 검색하여 페이징 메시지를 수신하도록 이루어진 것을 특징으로 하는 이동 통신 단말기의 절전 방법.The terminal wakes up from a sleep mode according to a discontinuous reception (DRX) cycle, and searches for a call indicator (PI) in a common pilot channel (CPICH) to receive a paging message. 제1항에 있어서, 상기 페이징 메시지는 공통파일럿채널(CPICH)에서 호출지시자(PI)가 특정 비트로 설정되어 있을 경우에 규정된 소정시간 후 2차 공통제어 채널(S-CCPCH)의 복조를 수행하여 수신하는 것을 특징으로 이동 통신 단말기의 절전 방법.The method of claim 1, wherein the paging message is demodulated by the secondary common control channel (S-CCPCH) after a predetermined time specified when the call indicator (PI) is set to a specific bit in the common pilot channel (CPICH) A power saving method of a mobile communication terminal, characterized in that for receiving.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110083454A (en) * 2010-01-12 2011-07-20 삼성전자주식회사 Method and apparatus for supporting discontinuous reception operation in mobile communication system
WO2011084024A3 (en) * 2010-01-08 2011-12-01 Samsung Electronics Co., Ltd. Paging method and apparatus for communication of m2m/mtc device operating in high power saving reception mode in a mobile communication system, and system thereof
WO2012013064A1 (en) * 2010-07-26 2012-02-02 中兴通讯股份有限公司 Method and apparatus for transmitting paging indicator channel frames
USRE49879E1 (en) 2010-01-12 2024-03-19 Samsung Electronics Co., Ltd. Method and apparatus for supporting discontinuous reception operation in mobile communication system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011084024A3 (en) * 2010-01-08 2011-12-01 Samsung Electronics Co., Ltd. Paging method and apparatus for communication of m2m/mtc device operating in high power saving reception mode in a mobile communication system, and system thereof
US9125157B2 (en) 2010-01-08 2015-09-01 Samsung Electronics Co., Ltd Paging method and apparatus for communication of M2M/MTC device operating in high power saving reception mode in a mobile communication system, and system thereof
US9930724B2 (en) 2010-01-08 2018-03-27 Samsung Electronics Co., Ltd. Paging method and apparatus for communication of M2M/MTC device operating in high power saving reception mode in a mobile communication system, and system thereof
US10362627B2 (en) 2010-01-08 2019-07-23 Samsung Electronics Co., Ltd. Paging method and apparatus for communication of M2M/MTC device operating in high power saving reception mode in a mobile communication system, and system thereof
KR20110083454A (en) * 2010-01-12 2011-07-20 삼성전자주식회사 Method and apparatus for supporting discontinuous reception operation in mobile communication system
USRE47736E1 (en) 2010-01-12 2019-11-19 Samsung Electronics Co., Ltd. Method and apparatus for supporting discontinuous reception operation in mobile communication system
USRE49879E1 (en) 2010-01-12 2024-03-19 Samsung Electronics Co., Ltd. Method and apparatus for supporting discontinuous reception operation in mobile communication system
WO2012013064A1 (en) * 2010-07-26 2012-02-02 中兴通讯股份有限公司 Method and apparatus for transmitting paging indicator channel frames

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