WO2001052586A1 - Optimized sleep mode operation - Google Patents
Optimized sleep mode operation Download PDFInfo
- Publication number
- WO2001052586A1 WO2001052586A1 PCT/FI2001/000023 FI0100023W WO0152586A1 WO 2001052586 A1 WO2001052586 A1 WO 2001052586A1 FI 0100023 W FI0100023 W FI 0100023W WO 0152586 A1 WO0152586 A1 WO 0152586A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- burst
- training sequence
- sequence part
- bursts
- channel
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
-
- 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
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the invention relates to operations in TDD (time division duplex) mode in third generation cellular telecommunication systems. Especially, the invention is related to such a method as specified in the preamble of the independent method claim.
- a typical third generation mobile telephone system structure will be shortly described. Only those functional blocks are shown which have certain importance to the description of the present invention; it is obvious to a person skilled in the art that a common mobile telephone system also comprises other functions and structures, which need not be discussed in greater detail here.
- the main parts of the mobile telephone system are: a CN or a core network 101 , a UTRAN or UMTS terrestrial radio access network 102 and a UE or user equipment 103.
- the user equipment is often called a mobile terminal or a mobile communication means.
- the interface between the CN and the UTRAN is called the Iu interface
- the interface between the UTRAN and the UE is called the Uu interface.
- the UTRAN is composed of RNSs or radio network subsystems 104.
- the interface between two RNSs is called the Iur interface.
- the RNS comprises a RNC or radio network controller 105 and one or more node Bs 106.
- the interface between an RNC and a node B is called the Iub interface.
- Each node B gives rise to at least one coverage area, i.e. cell, which is designated in Figure 1 by 107.
- UTRA UMTS Terrestrial Radio Access
- TDD time division duplex
- Each of the time slots can be allocated to either the upling or the downlink.
- the allocation can be nearly symmetric or even highly asymmetric, if needed.
- At least one time slot has to be allocated for the downlink and at least one time slot has to be allocated for the uplink.
- the flexibility in the allocation of time slots in uplink and downlink directions allows the TDD mode to be adapted to highly differing environments.
- the data symbols of a channel is sent in bursts.
- One burst is transmitted in a time slot.
- Figure 2 shows the structure of a burst.
- a burst comprises a first data part, a midamble, a second data part and a guard period.
- Two types of bursts are defined in UTRA TDD, which have different lenghts for the data parts and the midamble.
- Figure 2 shows the lengths of a type 1 burst, data parts being 976 chips long and the midamble 512 chips long.
- the midamble of a type 2 burst is 256 chips long, and the data parts 1104 chips long.
- the guard period in both types of bursts is 96 chips long.
- the midamble of a burst carries no payload data.
- the midamble functions as a training sequence for use by a receiver in signal acquisition and tracking.
- the UTRA TDD mode is described in more detail in various 3GPP (3rd Generation Partnership Project) specifications, such as the TS 25.221 V3.0.0 specification describing physical channels and mapping of transport channels onto physical channels.
- 3GPP 3rd Generation Partnership Project
- the paging mechanism uses two channels, namely the PICH (Paging Indicator CHannel) and the PCH (Paging CHannel). Paging messages are carried in the PCH, and the PICH carries only indications, if paging messages relating to mobile terminals in a given paging group are to be expected.
- the paging channel is transmitted over a paging area (PA) which may comprise one or more cells.
- PA paging area
- the number of mobile terminals within the paging area can be large, whereby the traffic volume of the paging channel can also be large.
- PICH indicate to each paging group of mobile terminals, if a paging message is to be expected on the PCH to some terminal of the paging group.
- Receiving of a paging indicator requires only receiving of a single burst and decoding the data bits of the burst to obtain the paging indicator values.
- the paging indicators are sent at predetermined intervals, so that terminals can stay in sleep mode between the paging indicator bursts. If a paging indicator indicates that a paging message is to be expected for the paging group of a particular mobile terminal, that mobile terminal begins to listen to PCH for a certain period to find out, if any paging messages are intended to that mobile terminal.
- Terminals in a paging area are divided into 60 paging groups, which allows the number of mobile terminals to stay rather low.
- the low number of terminals in a paging group results in a low number of paging messages intended for terminals in the group, whereby the terminals need to listen to PCH only for short periods of time. This results in a low power consumption in the sleep mode.
- a mobile terminal also needs to monitor the quality of the radio link to the current cell of the mobile terminal. If the quality of the radio link degrades for example due to moving of the terminal out of the coverage area of the cell, the mobile terminal needs to perform a handover to another cell. For this purpose, a mobile terminal needs to receive a burst in the PCCPCH (Primary Common Control Physical Channel) and measure the reception level of the midamble of a burst carrying PCCPCH information. If the reception level is too low, the terminal needs to start searching and listening to neighboring cells to find a cell, whose transmissions the terminal can receive at a sufficient level.
- PCCPCH Primary Common Control Physical Channel
- An object of the invention is to realize a method, which allows better optimization of sleep mode operation for TDD terminals.
- a further object of the invention is to realize a method, which allows a further reduction in the time required for reception of paging indicators and for measuring radio link quality.
- a still further object of the invention is to realize a TDD mode mobile terminal with a better optimized sleep mode operation than mobile terminals according to prior art.
- a further object of the invention is to provide a system in a radio access network, which allows the TDD mode mobile terminals under control of the radio access network to further reduce the time required for reception of paging indicators and for measuring radio link quality.
- the objects are reached by adjusting the transmission level of the midamble of a PICH burst to a level, which has a predefined relation to the transmission level of a PCCPCH burst. This allows a TDD mode terminal to receive a single PICH burst, and determine the paging indicators and the reception level of the PCCPCH channel.
- the method according to the invention is characterized by that, which is specified in the characterizing part of the independent method claim.
- the mobile terminal according to the invention is characterized by that, which is specified in the characterizing part of the independent claim directed to a mobile terminal.
- the system according to the invention is characterized by that, which is specified in the characterizing part of the independent claim directed to a system.
- the power level of midamble of the burst sent in the slot of the PICH channel has a predefined relation to the power level of the bursts sent at the primary CCPCH channel. This allows the mobile communication means to receive only one burst for obtaining both desired pieces of information by decoding the PICH bits to find out if a paging message is to be received, and measuring the reception level of the midamble of the PICH burst for determining the quality of the radio connection.
- FIG. 1 illustrates an UMTS system according to prior art
- FIG. 2 illustrates burst structure in UTRA TDD mode according to prior art
- FIG. 3 illustrates a method according to an advantageous embodiment of the invention
- Figure 4 illustrates a method according to a further advantageous embodiment of the invention
- Figure 5 illustrates a mobile terminal according to an advantageous embodiment of the invention
- FIG. 6 illustrates a system according to an advantageous embodiment of the invention.
- a method for transmitting paging indicators in a cellular telecommunication system employing time division duplex mode is provided.
- information is carried in bursts over the air interface, and paging indicators are carried in data part of certain bursts having at least a data part and a training sequence part.
- the transmission level of at least the training sequence part of a burst carrying paging indicators has a predefined relation to the transmission level of the training sequence part of a burst belonging to a channel which is used in measurements of radio link quality.
- said channel is the primary common control physical channel (PCCPCH).
- PCCPCH primary common control physical channel
- said predefined relation is that the transmission level of at least the training sequence part of a burst carrying paging indicators is essentially the same as the transmission level of the training sequence part of a burst belonging to said channel.
- the transmission levels can also be different, i.e. the relation may be for example such that the transmission level of the training sequence i.e. the midamble of the PICH burst has a certain predetermined offset to the transmission level of the PCCPCH burst.
- the midamble of the PICH slot has a predefined power offset compared to the midamble of PCCPCH.
- the PICH slot can be sent with a lower level than the PCCPCH although the PICH needs to be heard in the whole cell, since in some cases the PICH symbols may be repeated, which increases the probability of correct reception.
- Figure 3 illustrates a method for transmitting paging indicators in a cellular telecommunication system employing time division duplex mode according to an advantageous embodiment ol the invention.
- the transmission level of a PICH burst is set to a level having a predefined relation to the transmission level of the training sequence part of a burst belonging to a channel which is used in measurements of radio link quality.
- the PICH burst is transmitted at such a level.
- the determination of the transmission level of the midamble of PICH bursts is performed during network planning phase, when the transmission levels for base stations are determined.
- the transmission level of the PICH bursts can in such an embodiment be determined to be essentially the same as the transmission level of PCCPCH bursts.
- a method in a mobile terminal of a cellular telecommunication network for measuring quality of a radio link between the mobile terminal and a base station of the network.
- Figure 4 shows an example of such a method according to an advantageous embodiment of the invention.
- the method is applicable with mobile terminals arranged to employ time division duplex mode and to receive bursts carrying information from the base station, the bursts having at least a data part and a training sequence part, and which mobile terminals are arranged to receive paging indicators carried in certain bursts.
- the method comprises steps, in which
- a result value indicating the quality of the radio link is determined 430 on the basis of said measurement of the reception level of the training sequence part of said burst.
- a mobile terminal of a cellular telecommunication network is provided.
- the mobile terminal is arranged to employ time division duplex mode and to receive bursts carrying information from the base station, the bursts having at least a data part and a training sequence part.
- the mobile terminal is also arranged to receive paging indicators carried in certain bursts.
- the mobile terminal comprises
- Fig. 5 shows a block diagram of a mobile terminal, in this example a digital mobile communication means according to an advantageous embodiment of the invention.
- the mobile communication means comprises a microphone 301 , keyboard 307, display 306, earpiece 314, antenna duplexer or switch 308, antenna 309 and a control unit 305, which all are typical components of conventional mobile communication means.
- the mobile communication means contains typical transmission and receiver blocks 304, 31 1.
- Transmission block 304 comprises functionality necessary for speech coding, encryption, and modulation, and the necessary RF circuitry for amplification of the signal for transmission.
- Receiver block 31 1 comprises the necessary amplifier circuits and functionality necessary for demodulating and decryption of the signal, and removing speech coding.
- the signal produced by the microphone 301 is amplified in the amplifier stage 302 and converted to digital form in the A/D converter 303, whereafter the the signal is taken to the transmitter block 304.
- the transmitter block encodes the digital signal and produces the modulated and amplified RF-signal, whereafter the RF signal is taken to the antenna 309 via the duplexer or switch 308.
- the receiver block 31 1 demodulates the received signal and removes the encryption and channel coding.
- the resulting speech signal is converted to analog form in the D/A converter 312, the output signal of which is amplified in the amplifier stage 313, whereafter the amplified signal is taken to the earpiece 314.
- the control unit 305 controls the functions of the mobile communication means, reads the commands given by the user via the keypad 307 and displays messages to the user via the display 307.
- the mobile communication means comprises means 308, 309, 311 for receiving a paging indicator burst, means 330 for measuring the reception level of the training sequence part of said paging indicator burst, and means 340 for determining a result value indicating the quality of the radio link on the basis of the output of said means for measuring.
- a system in a radio access network of a cellular telecommunication system is provided.
- the system is applicable in cellular telecommunication systems employing time division duplex mode, in which mode information is carried in bursts over the air interface, and in which mode paging indicators are carried in data part of certain bursts having at least a data part and a training sequence part.
- the system comprises means 510 for adjusting the transmission level of at least the training sequence part of a burst carrying paging indicators to a certain level, said certain level having a predefined relation to the transmission level of the training sequence part of a burst belonging to a channel which is used in measurements of radio link quality.
- said channel is the primary common control physical channel.
- said predefined relation is that the transmission level of at least the training sequence part of a burst carrying paging indicators is essentially the same as the transmission level of the training sequence part of a burst belonging to said channel.
- Figure 6 illustrates a system according to an advantageous embodiment of the invention.
- Figure 6 shows a core network 101 , a UTRAN (UMTS terrestrial radio access network) 102 and a mobile terminal (UE, user equipment) 103.
- the UTRAN is comprises a radio network subsystem 104.
- the RNS comprises a RNC (radio network controller) 105 and one or more node Bs 106. Each node B gives rise to at least one coverage area, i.e. cell, which is designated in Figure 6 by 107.
- RNC radio network controller
- the system comprises means 510 for adjusting the transmission level of at least the training sequence part of a burst carrying paging indicators to a certain level, said certain level having a predefined relation to the transmission level of the training sequence part of a burst belonging to a channel which is used in measurements of radio link quality.
- the means 510 for adjusting the transmission level is located in the RNC. In other embodiments, the means 510 can be located in other network elements as well.
- the invention has many advantages. For example, the invention allows better optimization of sleep mode operation for TDD terminals compared to the prior art. The invention also allows a reduction in the time required for reception of paging indicators and for measuring radio link quality. Further, the invention allows the determination of two different results from the reception of one burst in the sleep mode, namely determination whether there is a paging message coming to the terminal or not from the PICH bits of the burst, and to determine the cell Ec/NO value for cell selection or reselection purposes from the received power level of the midamble of the same burst.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001552677A JP3863427B2 (en) | 2000-01-13 | 2001-01-12 | Optimized sleep mode operation |
CA002396101A CA2396101C (en) | 2000-01-13 | 2001-01-12 | Optimized sleep mode operation |
AU2001226845A AU2001226845A1 (en) | 2000-01-13 | 2001-01-12 | Optimized sleep mode operation |
BRPI0107580-2A BR0107580B1 (en) | 2000-01-13 | 2001-01-12 | METHOD AND SYSTEM FOR TRANSMITTING THE PAGINATION INDICATORS AND FOR MEASURING THE QUALITY OF THE RADIO LINK BETWEEN THE MOBILE TERMINAL AND THE STATION BASED ON THE CELLULAR TELECOMMUNICATION SYSTEM, AND THE MOBILE TERMINAL. |
EP01901235A EP1247418B1 (en) | 2000-01-13 | 2001-01-12 | Optimized sleep mode operation |
DE60129297T DE60129297T2 (en) | 2000-01-13 | 2001-01-12 | OPTIMIZED SLEEP MODE OPERATION |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20000069A FI109568B (en) | 2000-01-13 | 2000-01-13 | Optimized sleep mode |
FI20000069 | 2000-01-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001052586A1 true WO2001052586A1 (en) | 2001-07-19 |
Family
ID=8557057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2001/000023 WO2001052586A1 (en) | 2000-01-13 | 2001-01-12 | Optimized sleep mode operation |
Country Status (14)
Country | Link |
---|---|
US (1) | US7035234B2 (en) |
EP (1) | EP1247418B1 (en) |
JP (2) | JP3863427B2 (en) |
KR (1) | KR100555023B1 (en) |
CN (1) | CN1203721C (en) |
AT (1) | ATE367065T1 (en) |
AU (1) | AU2001226845A1 (en) |
BR (1) | BR0107580B1 (en) |
CA (1) | CA2396101C (en) |
DE (1) | DE60129297T2 (en) |
ES (1) | ES2288502T3 (en) |
FI (1) | FI109568B (en) |
WO (1) | WO2001052586A1 (en) |
ZA (1) | ZA200204798B (en) |
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US6934550B2 (en) | 2002-03-29 | 2005-08-23 | Interdigital Technology Corporation | Low layer paging indicator processing system and method for multi-layer communication equipment used in a wireless communication system |
CN1327740C (en) * | 2003-07-25 | 2007-07-18 | Lg电子株式会社 | Paging indicator deciding method of mobile communication terminal |
WO2009105987A1 (en) * | 2008-02-29 | 2009-09-03 | Huawei Technologies Co., Ltd. | Method and apparatus for supporting paging and deep sleep with multiple radio interfaces |
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US6810236B2 (en) * | 2001-05-14 | 2004-10-26 | Interdigital Technology Corporation | Dynamic channel quality measurement procedure for adaptive modulation and coding techniques |
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AU2002219235A1 (en) * | 2002-01-04 | 2003-07-15 | Nokia Corporation | Method and device for downlink packet access signalling for time division duplex (tdd) mode of a wireless communication system |
KR100480048B1 (en) * | 2002-04-25 | 2005-03-30 | 엘지전자 주식회사 | Page analyzing apparatus for wideband code division multiple access terminal system |
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US7698553B2 (en) * | 2003-05-20 | 2010-04-13 | Motorola, Inc. | Method for utilizing multiple level encryption |
US7058378B2 (en) * | 2003-11-18 | 2006-06-06 | Interdigital Technology Corporation | Method and apparatus for automatic frequency correction of a local oscilator with an error signal derived from an angle value of the conjugate product and sum of block correlator outputs |
US8045494B2 (en) * | 2004-02-06 | 2011-10-25 | Koninklijke Philips Electronics N.V. | System and method for hibernation mode for beaconing devices |
EP1578095B1 (en) * | 2004-03-17 | 2006-06-28 | Alcatel | Method for controlling the sleep mode on a mobile terminal, corresponding mobile terminal and corresponding radio access node |
KR100617731B1 (en) * | 2004-06-19 | 2006-08-28 | 삼성전자주식회사 | Apparatus and method for transmitting/receiving a traffic indication message in a communication system |
KR101205847B1 (en) * | 2006-01-17 | 2012-12-03 | 삼성전자주식회사 | Method and apparatus for performing decoding of a control channel in a wireless connunication system |
MY187397A (en) * | 2006-04-28 | 2021-09-22 | Qualcomm Inc | Method and apparatus for enhanced paging |
EP2338259B8 (en) | 2008-09-12 | 2013-11-06 | QUALCOMM Incorporated | A method and apparatus for signaling to a mobile device which set of training sequence codes to use for a communication link |
CN101854707B (en) * | 2009-03-31 | 2012-10-10 | 财团法人工业技术研究院 | Judging method for switching sleep mode |
CN102547930B (en) * | 2010-12-30 | 2014-10-08 | 联芯科技有限公司 | Paging indicator judging method and device and mobile terminal |
CN102984792B (en) * | 2012-12-18 | 2017-02-08 | 上海晨思电子科技有限公司 | Paging indication transmission method, system and receiving device of mobile communication system |
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- 2001-01-12 CA CA002396101A patent/CA2396101C/en not_active Expired - Fee Related
- 2001-01-12 KR KR1020027008990A patent/KR100555023B1/en active IP Right Grant
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- 2001-01-12 AU AU2001226845A patent/AU2001226845A1/en not_active Abandoned
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- 2001-01-12 ES ES01901235T patent/ES2288502T3/en not_active Expired - Lifetime
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US6934550B2 (en) | 2002-03-29 | 2005-08-23 | Interdigital Technology Corporation | Low layer paging indicator processing system and method for multi-layer communication equipment used in a wireless communication system |
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Also Published As
Publication number | Publication date |
---|---|
CA2396101A1 (en) | 2001-07-19 |
BR0107580A (en) | 2002-10-15 |
JP4486061B2 (en) | 2010-06-23 |
CN1395805A (en) | 2003-02-05 |
JP2003520522A (en) | 2003-07-02 |
ZA200204798B (en) | 2003-04-30 |
CN1203721C (en) | 2005-05-25 |
FI20000069A (en) | 2001-07-14 |
KR20020071938A (en) | 2002-09-13 |
JP3863427B2 (en) | 2006-12-27 |
US7035234B2 (en) | 2006-04-25 |
CA2396101C (en) | 2008-04-01 |
FI20000069A0 (en) | 2000-01-13 |
AU2001226845A1 (en) | 2001-07-24 |
ATE367065T1 (en) | 2007-08-15 |
FI109568B (en) | 2002-08-30 |
DE60129297D1 (en) | 2007-08-23 |
US20010008838A1 (en) | 2001-07-19 |
EP1247418B1 (en) | 2007-07-11 |
ES2288502T3 (en) | 2008-01-16 |
KR100555023B1 (en) | 2006-03-03 |
DE60129297T2 (en) | 2008-03-13 |
BR0107580B1 (en) | 2014-12-02 |
EP1247418A1 (en) | 2002-10-09 |
JP2006325225A (en) | 2006-11-30 |
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